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43results about How to "Achieve thermoelectric decoupling" patented technology
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Thermoelectric decoupling heating system extracting steam from utility boiler
InactiveCN106194296AAchieve thermoelectric decouplingCapable of peak regulationSteam engine plantsEngineeringHigh pressure
The invention discloses a thermoelectric decoupling heating system extracting steam from a utility boiler. A steam condensing heat exchanger is mainly adopted for heating return water of a heating network, a steam extraction heater is then additionally arranged behind the steam condensing heat exchanger, and heat source steam of the steam extraction heater is extracted from an overheating section or a reheating section of the utility boiler. When a turbine power generation system is under the high load, exhaust steam of a turbine or steam extracted from a medium-pressure cylinder and low-pressure cylinder communicating pipe of the turbine is completely adopted to be condensed in the steam condensing heat exchanger to release heat to heat the water of the heating network, when the load of the turbine power generation system is reduced and the heating capability of the steam condensing heat exchanger is insufficient, high-pressure steam is extracted from the utility boiler, subjected to pressure reduction and sent to the steam extraction heater, the water of the heating network is further heated, and therefore it is ensured that the heating capability is not reduced under the low power generation load. According to the thermoelectric decoupling heating system extracting the steam from the utility boiler, thermoelectric decoupling of a heating power plant can be achieved, it is ensured that the heating capability under the low power generation load is not reduced, in addition, decreasing of the temperature of tail smoke of the utility boiler under the low load can be relieved, and it is ensured that a boiler denitration system works normally.
Owner:HUANENG POWER INT INC +1
Thermoelectricity decoupling transformation and operation method based on heat source end and heat network comprehensive adjustment
ActiveCN106894855ARealization of de-cylinder operationIncrease heating capacityHeating fuelCentral heating with accumulated heatEngineeringHigh pressure
The invention provides a thermoelectricity decoupling transformation and operation method based on heat source end and heat network comprehensive adjustment, and the thermoelectricity decoupling is realized through transformation of a high-pressure bypass and low-pressure bypass, cylinder disengaging operation of a low-pressure cylinder, additional arrangement of an electric boiler and pipe network heat storage of a heat network. In order to ensure the heat supply capacity of a unit under the low load, the cylinder disengaging operation transformation of the low-pressure cylinder is carried out on the basis of an original steam extraction and heat supply mode to increase the heat supply capacity of the unit; meanwhile, by means of joint adjustment of an initial station and a secondary station, the defect that the heat supply capacity is insufficient under the low load is overcome through the heat storage of a primary pipe network under the high load; by means of the cylinder disengaging operation of the low-pressure cylinder and the heat storage of the primary pipe network, the problem that the heat supply amount under the low load is low during the whole heat supply period can be solved basically; the electric boiler is adopted during transformation so that the electric boiler can be used as the peak adjustment of the heat load when the heat storage function fails because of an extreme weather period and a long-time pipe network operation of the unit under the low load; and meanwhile, the high-pressure bypass and the low-pressure bypass are transformed to serve as a standby means for heat supply, so that the reliability of heat supply under the low load of the unit is further improved.
Owner:晟源高科(北京)科技有限公司
Thermoelectric decoupling and peak shaving system
PendingCN107166484ARealize thermal energy storageAchieve thermoelectric decouplingHeating fuelHeat recovery systemsThermal energyEngineering
The invention relates to a thermoelectric decoupling and peak shaving system. The thermoelectric decoupling and peak shaving system comprises a thermal power plant heating-extracting heat supply network heating system and a heat supply network system. The thermoelectric decoupling and peak shaving system is characterized by further comprising an electric network and electric plant peak shaving control platform and a heat supply network heat storage and release operation and management platform and further comprising at least one of a circulating water waste-heat heat pump recycling system and an electric boiler heating system; and when the electric network and electric plant peak shaving control platform of the thermoelectric decoupling and peak shaving system gives out a peak shaving command, an electric plant converts electric energy into heat energy by starting an electric boiler and the circulating water heat pump and conveys the heat energy into a heat supply pipe network, and the heat supply network heat storage and release control platform is used for controlling the whole temperature increase of a primary pipe network and a secondary pipe network so as to achieve the purpose of pipe network heat storage. The wind abandoning and light abandoning peak shaving electric quantity is absorbed through the heat pump and the electric boiler, the complete thermoelectric decoupling can be achieved for the thermal power plant, the pure condensing operation depth peak shaving of the thermal power plant becomes possible, the thermal power plant can receive the subsidy through the depth peak shaving, and the heating safety can be guaranteed through the pipe network heat storage.
Owner:HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
Electric peak load regulation gas-fired cogeneration waste heat recycling device and method
ActiveCN108266777AImprove power peak shaving capabilityReduce pollutionHeating fuelLighting and heating apparatusCogenerationPeak load
The invention relates to an electric peak load regulation gas-fired cogeneration waste heat recycling device and method. The device comprises a central urban area heat supply system and an external supply area heat supply system which are arranged in a power plant, and the two systems are each composed of a high-temperature heat storage tank, a low-temperature heat storage tank, a steam-water heatexchanger, a heat pump unit, a flue gas heat exchanger and accessories such as valves. The method comprises the steps that the running mode of the device is adjusted through different valve opening and closing combinations, and then the device runs in the electrical load off-peak period and in the electrical load peak period separately. According to the electric peak load regulation gas-fired cogeneration waste heat recycling device and method, thermoelectric decoupling of the gas-fired cogeneration power plant in winter is achieved, flue gas total heat is recycled on the condition that it isguaranteed that the heat supply capacity of an original heat supply network of the central urban area is invariable, the added heat is externally supplied to a newly-added heat supply area, and meanwhile the electric peak load regulation capability of the gas-fired power plant in winter is significantly improved to reduce a wind curtailment phenomenon. The heat supply network of the central urbanarea still runs according to an original heat supply mode, only a large-temperature-difference heat exchange unit of a tail-end heating station of the external supply area needs to be transformed ornewly constructed, and therefore the transforming or newly constructing cost is reduced.
Owner:BEIJING THUPDI PLANNING DESIGN INST +2
Energy-saving thermoelectric decoupling system and operating method thereof
ActiveCN108361086AIncrease flexibilityIncrease heat loadSuperheating controlSteam useEngineeringDeaerator
The invention provides an energy-saving thermoelectric decoupling system and an operating method thereof. The system comprises a boiler, a steam turbine high-pressure cylinder, a steam turbine mediumand low-pressure cylinder, a condenser, a condensate pump, a low-pressure heater, a deaerator, a water feed pump and a high-pressure heater which communicate in sequence, and further comprises a mainsteam injection system, a reheat steam injection system and a heat supply network heat exchanger. The main steam flow going into the heat supply network heat exchanger is adjusted through a main steaminjection system high-pressure steam regulation valve and a main steam injection system bypass regulation valve which communicate with an inlet of the main steam injection system, and meanwhile, thereheat steam flow going into the heat supply network heat exchanger is adjusted, so that the ratio of the main steam flow going into the heat supply network heat exchanger to the reheat steam flow going into the heat supply network heat exchanger is equal to the ratio of the main steam flow going into the steam turbine high-pressure cylinder from the boiler to the reheat steam flow going into thesteam turbine medium and low-pressure cylinder. The energy-saving thermoelectric decoupling system is simple in structure, little in investment and high in energy utilization efficiency.
Owner:XI AN JIAOTONG UNIV
Heat-power decoupling system of combined heat and power generation unit and operation method
ActiveCN110454764AAchieve thermoelectric decouplingStored in a large temperature differenceSteam generation plantsSteam engine plantsCogenerationEngineering
The invention discloses a heat-power decoupling system of a combined heat and power generation unit and an operation method. The system comprises a boiler, a steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a steam turbine low-pressure cylinder, a condenser, a condensation water pump and a heat regenerative system which communicate with one another in sequence, and further comprises a heat supply system formed by an absorption heat pump, a heat storage heat exchanger, a heat storage tank, a high-temperature heater and a low-temperature heater jointly; the heat regenerative system comprises a low-pressure heater set, a deaerator, a water feeding pump and a high-pressure heater set which are connected in sequence, the storage temperature of the heat storage tank is 50 DEG C to 350 DEGC, heat release is performed through two stages, a high-temperature section serves as a driving heat source of the absorption heat pump, and a low-temperature section is used for further heating heat-network water obtained after absorbing heat in the absorption heat pump. According to the heat-power decoupling system of the combined heat and power generation unit and the operation method, heat-power decoupling can be realized, the waste heat of exhaust steam of a steam turbine is recycled, and the energy utilization efficiency is high.
Owner:XI AN JIAOTONG UNIV
Effective-flexible cogeneration system in supercritical carbon dioxide
ActiveCN107355265AIncreased power cycleImprove waste heat qualityCompression machinesSteam useElectrolysisPower cycle
The invention discloses an effective-flexible cogeneration system in supercritical carbon dioxide, which comprises a power-cycle power generating system in supercritical carbon dioxide, a reverse circulation heating system in supercritical carbon dioxide and a shunt water heating system for heating water. Based on the existing power-cycle power generating system in supercritical carbon dioxide, the effective-flexible cogeneration system adds the reversing circulation in supercritical carbon dioxide, thereby the residual heat quality of the driving force circulating cold end can be improved, then the residual heat can meet the requirement of heating, and the aims of the cogeneration system can be achieved and the comprehensive utility efficiency can be highly improved. By shunting the shunt water heating system, one part of the water can be heated directly by the residual heat in higher temperature of the driving force circulating cold end, and the other part of the water absorbs the residual heat in lower temperature by the heat pump technology and heat the shunting water. The cogeneration system realizes the classification using of the energy, and by adjusting proportion of shunting, the cogeneration system adjusts the proportion of external power supply and heat supply, and then the system can realize the totally hot electrolytic coupling.
Owner:XIAN THERMAL POWER RES INST CO LTD
Waste heat recovery system and method for coal-fired power plant
PendingCN111486468AAvoid Low Temperature CorrosionLow temperature corrosion achievedCombustion processClimate change adaptationAir preheaterElectrolysis
The invention provides a waste heat recovery system for a coal-fired power plant. The waste heat recovery system involves a boiler, an air preheater, a plurality of coolers, a dust remover, a desulfurizing tower, a flue gas condensation heat exchanger, a flue gas reheater and a chimney which are sequentially arranged; the plurality of coolers are sequentially connected in series, the outlet temperatures of heat exchange media of the plurality of coolers are sequentially reduced, and the plurality of coolers correspond to different heat using devices; the system involves an absorption heat pump, a thermocline heat storage tank and a heat supply network, and the hot water output end of the thermocline heat storage tank communicates with the heat supply network; and heat generated by part ofthe coolers is used for driving the absorption heat pump to recover heat released in the flue gas condensation process, part of the heat generated by the heat pump is conveyed to the flue gas reheaterto be used for reheating flue gas, part of the heat is used for preheating air, and the rest part of the heat is continuously heated in part of coolers and stored in the thermocline heat storage tankto supply heat loads needed by the heat supply network. Gradient utilization of energy is achieved, energy conservation, water recovery and thermoelectric decoupling can be achieved simultaneously, and the unit waste heat and water recovery capacity and the power station operation flexibility are improved.
Owner:DATANG ENVIRONMENT IND GRP +1
Whole network distributed heat storage and supply system and method
ActiveCN108895514AMeet peak shaving needsSolve balance problemsCentral heating with accumulated heatLighting and heating apparatusControl systemEngineering
The invention relates to a whole network distributed heat storage and supply system and method and belongs to the field of heat storage and supply systems. The whole network distributed heat storage and supply system is characterized by comprising a heat supply system, a heat storage system, a control system and a management and control platform, wherein the heat supply system is connected to theheat storage system, and the control system is separately connected to the heat supply system, the heat storage system and the management and control platform; the heat storage system includes a heatstorage tank, an electric shut-off valve, an electric regulating valve and a circulating water pump, wherein a cold water end and hot water end of the heat storage tank are separately connected to theheat supply system through the electric shut-off valve, the electric regulating valve and a circulating water pump. The whole network distributed heat storage and supply system and method have the advantages that novel heating systems of heat storage devices are installed on positions such as users' houses, heat exchange stations, pipe networks, renewable energy source areas, thermal power plantsand regional boiler rooms, and through the mode of combining user sides, pipe network sides and heat source sides for heat storage, not only are the needs of heat sources for peak shaving met, but also the advantages of being narrow in adjustment range, closer to the users, higher in flexibility and the like are achieved.
Owner:大连海心信息工程有限公司
System for realizing thermo-electric decoupling and rapid peak regulation by utilizing bypass
PendingCN108678819AIncrease heating capacityReduce outputLighting and heating apparatusSteam useElectricityPower grid
Owner:NORTH CHINA ELECTRICAL POWER RES INST +3
Fused salt heat storage and heat-conducting oil heat transfer system as well as heat conducting method
PendingCN109654928AImprove utilization efficiencyAccelerate the heating processHeat storage plantsEnergy storageThermal energyStart time
The invention provides a fused salt heat storage and heat-conducting oil heat transfer system. The fused salt heat storage and heat-conducting oil heat transfer system comprises a fused salt heat storage tank, a heat-conducting oil circulating main pipeline, a heat exchanger unit and a heating system, wherein the fused salt heat storage tank is filled with fused salt subjected to heat storage; a heating device can be started through grid off-peak electrical energy so as to heat the fused salt subjected to heat storage and the heat-conducting oil, and meanwhile, heat exchange between the heatedheat-conducting oil and the fused salt subjected to heat storage is carried out, so that a heating process of the fused salt subjected to heat storage can be further quickened until the fused salt subjected to heat storage reaches a set temperature, and thus, the starting time of the system is shortened, and the operation efficiency of the system is improved; and after heat storage is carried outcompletely, an external supply medium is heated through the heat exchanger group. The system disclosed by the invention has the advantages that the fused salt subjected to heat storage is heated by utilizing the grid off-peak electrical energy, so that electro-thermal conversion is completed, and then the external supply medium is heated through the converted heat, and thus, thermoelectric decoupling is realized, and therefore, the utilization efficiency of energy is improved.
Owner:NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP
Comprehensive frequency modulation and peak regulation system of coal-fired power plant
PendingCN111256192AMeet peak shaving needsIncrease flexibilityLiquid degasificationHot-water central heatingDeaeratorCondensate pump
A comprehensive frequency modulation and peak regulation system of a coal-fired power plant comprises a heat accumulator, a heat accumulator cold water pipeline, a heat accumulator hot water pipeline,a condensate water return pipeline, a condenser, a steam turbine, a generator connected with the steam turbine, an electric heating conversion device connected with the generator through a power transmission line, a heat storage heater with one side connected with the electric heating conversion device and the other side connected with the heat accumulator cold water pipeline and the heat accumulator hot water pipeline through a heat storage pipeline, a heating network heater connected with the heat accumulator cold water pipeline and the heat accumulator hot water pipeline through a heat release pipeline, a condensate pump, a shaft seal heater with one end connected with the condensate pump and the other end connected with a condensed water supply pipe, a low-pressure heater, a deaerator, a water supply pump and a high-pressure heater. The system not only can meet the peak regulation requirement of the coal-fired power plant, but also can meet the frequency regulation requirement ofa large power grid, simultaneously can improve the utilization rate of existing heat accumulator equipment and obviously improves the flexibility of the coal-fired power plant. The system can be widely applied to flexible transformation of the coal-fired power plant.
Owner:QINGDAO DANENG ENVIRONMENTAL PROTECTION INC
Heat supplying system of fuel gas-steam combined circulation heat power plant
ActiveCN109945268ASolve the problem of thermal and electrical load mismatchAchieve thermoelectric decouplingLighting and heating apparatusSpace heating and ventilation detailsElectricityCogeneration
The invention belongs to the technical field of combined heat and power generation, and discloses a heat supplying system of a fuel gas-steam combined circulation heat power plant. The system comprises three heat exchangers, and has three heat supplying modes connected in parallel; according to the first heat supplying mode, part of steam is introduced into one of the heat exchangers; according tothe second heat supplying mode, part of steam is introduced into the three heat exchangers in sequence; and according to the third heat supplying mode, all steam is introduced into the three heat exchangers in sequence. According to the heat supplying system of the fuel gas-steam combined circulation heat power plant, by adjusting steam inflow of a steam turbine of the fuel gas-steam combined circulation heat power plant, flexible switching of three heat supplying running modes is achieved, and therefore changing of heat supplying loads is achieved; and the problem that heat and electricity loads of the fuel gas-steam combined circulation heat power plant are not matched is effectively solved, and thermoelectric decoupling is achieved.
Owner:TAIYUAN UNIV OF TECH
Thermoelectric decoupling system and method for gas turbine cogeneration unit
PendingCN111237732AReduce energy consumptionReduce consumptionLiquid degasificationSteam useElectrolysisHigh energy
The invention relates to a thermoelectric decoupling system for a gas turbine cogeneration unit. The thermoelectric decoupling system comprises a molten salt storage and heat release system, a waste heat boiler, a chimney, a gas turbine, a steam turbine medium-pressure cylinder, a steam turbine low-pressure cylinder, a generator and a hot user. The thermoelectric decoupling system has the beneficial effects that molten salt is heated by using high-temperature flue gas after the gas turbine generates power so as to store heat, so that high energy consumption caused by a direct combustion boileris avoided, the consumption of natural gas is reduced, and the steam cost is reduced; compared with an existing peak regulation technique of a heat accumulating type electric boiler, the problem of high energy consumption caused by the change of high-quality power into steam is solved; and according to the thermoelectric decoupling system, the gas turbine and the waste heat boiler are not rebuilt, only one molten salt storage and heat release system is additionally arranged, so that the thermoelectric decoupling of the gas turbine cogeneration unit is realized, and the problem that the directcombustion steam boiler with high energy consumption is forced to adopt due to shutdown of the gas turbine is solved.
Owner:ZHEJIANG ZHENENG TECHN RES INST +1
Virtual power plant thermoelectric combined economic dispatching method containing heat utilization comprehensive satisfaction
PendingCN111768108APromote digestionAchieve thermoelectric decouplingResourcesInformation technology support systemCogenerationProcess engineering
The invention discloses a virtual power plant thermoelectric combined economic dispatching method containing heat utilization comprehensive satisfaction. The method comprises the specific steps ofS1,enabling a cogeneration unit and a wind power plant to be aggregated into a thermal-electric virtual power plant, carrying out the demand response management of a thermal load, and introducing an excitation type thermal load demand response, S2, constructing a heat utilization comprehensive satisfaction model for weighted consideration of the heat utilization mode satisfaction and the heat utilization cost satisfaction, and constraining the heat load demand response through the model, and S3, constructing a virtual power plant thermoelectric combined economic dispatching model containing heatutilization comprehensive satisfaction by taking the maximum net income of the virtual power plant as a target function, and formulating a dispatching scheme according to the model. The method is simple in implementation process, can effectively promote wind power consumption by implementing the excitation type thermal load demand response on the basis of meeting the heat utilization of a user, and meanwhile, improves the flexibility and economy of virtual power plant scheduling.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Combined heat and power generation system and working method thereof
ActiveCN112302747ADoes not affect power generation capacityBreaking the thermoelectric rigid coupling relationshipLighting and heating apparatusSteam useCogenerationProcess engineering
The embodiment of the invention provides a combined heat and power generation system. The combined heat and power generation system comprises a steam turbine generator unit, a heat supply network heater, a low-pressure bypass, a steam extraction pipeline, a hot water container, a heat supply and water return pipeline, and a heat supply and water supply pipeline; the first end of the low-pressure bypass communicates with a steam outlet of a reheater, and the second end of the low-pressure bypass communicates with a steam inlet of the heat supply network heater; the first end of the steam extraction pipeline communicates with a steam outlet of a medium-pressure cylinder, and the second end of the steam extraction pipeline communicates with a steam inlet of the heat supply network heater; thehot water container is provided with a hot water inlet and a hot water outlet, and the hot water inlet communicates with a hot water outlet of the heat supply network heater; the heat supply and water return pipeline communicates with a cold water inlet of the heat supply network heater; and the heat supply and water supply pipeline communicates with a hot water outlet of the heat supply networkheater and a hot water outlet of the hot water container. The combined heat and power generation system provided by the embodiment of the invention has the advantages of flexible adjustment of heat and power, large peak shaving depth, good economic benefit, stable load and the like.
Owner:STATE POWER INVESTMENT CORP RES INST +1
Heat-storage power generation system
PendingCN109113813ARealize load reduction, peak regulation and frequency regulationSolution depthSteam useLoad SheddingMechanical energy
The invention discloses a heat-storage power generation system, and belongs to the technical field of thermoelectricity. The heat-storage power generation system comprises a main steam boiler (101), amain steam turbine (102), a main power generator (103) and a steam tank group (104), wherein the main steam boiler is used for generating steam; the inlet of the main steam turbine communicates withthe outlet of the main steam boiler (101); the main steam turbine is used for converting steam energy into mechanical energy; the main power generator is used for converting mechanical energy into electric energy and supplying power to a power grid (200); the steam tank group is equipped with at least one high-pressure tank (104a); the inlet of the steam tank group communicates with the outlet ofthe main steam boiler (101) and / or a steam extraction port of the main steam turbine (102); and the steam tank group is used for storing steam extracted from the main steam boiler (101) and / or the main steam turbine (102), so that load-shedding peak load regulation and frequency regulation can be achieved, and the stored steam can be used for the load-increasing peak load regulation and frequencyregulation during staggered power generation and / or used for heat supply. The heat-storage power generation system disclosed by the invention has the beneficial effect that through the arrangement ofthe steam tank group, the steam generated from the main steam boiler can be extracted for being stored, the stored steam can be used for staggered power generation, and then load-shedding and load-increasing peak load regulation and frequency regulation in the heat-storage power generation system can be quickly achieved.
Owner:HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
Absorption heat pump heat storage and heat releasing system used for heating unit and work method of absorption heat pump heat storage and heat releasing system
ActiveCN110243009ARealization of heat storageIncrease heat storageHeat pumpsSpace heating and ventilation detailsLatent heat storageWater vapor
The invention discloses an absorption heat pump heat storage and heat releasing system used for a heating unit and a work method of the absorption heat pump heat storage and heat releasing system. The system is composed of a liquid storage tank, a solution heat exchanger, an evaporator, a condenser, an absorber, a solution cooler, a liquid conveying pump, a liquid return pump, a valve, a relevant pipeline and other devices. The system has two tropical work processes of heat storage and heat releasing. By means of the system and the work method, the characteristic that when the concentration of a heat storage medium is changed, water vapor is absorbed or released is utilized so that latent heat storage of water for use can be achieved, meanwhile, the temperature changing range of the heat storage medium is enlarged, the latent heat storage amount is correspondingly increased, and therefore the heat storage amount of the unit heat storage medium is increased, the volume of a heat storage tank is reduced, and the system investment is reduced. The system works with the working process similar to an absorption heat pump all the time, exhaust waste heat of a turbine can be recycled, the heating capacity of a unit can be improved, the power generation coal consumption rate of the unit can also be reduced, and good heat economical efficiency and technical economical efficiency are achieved.
Owner:XI AN JIAOTONG UNIV
Heat supply system and method adopting heat-storage auxiliary peak-regulation and used for coal-fired power generator set
PendingCN109139153AAchieve Peaking FlexibilityImprove living qualityHeat storage plantsSteam generation using pressureElectricityPower grid
The invention relates to the field of heat supply for thermal power plants, and specifically relates to a heat supply system and method adopting heat-storage auxiliary peak-regulation and used for a coal-fired power generator set. The heat supply system comprises a front end and a tail end, wherein at least two branches are comprised between the front end and the tail end; the branches are joinedand communicated at the front end and the tail end of the heat supply system separately; each branch comprises a heat supply branch and a heat storage-taking branch; a heat exchange unit is arranged on each heat supply branch, and each heat supply branch carries out heat exchange with a heat network through the corresponding heat exchange unit; and a heat storage-taking unit is arranged on the heat storage-taking branch, and each heat storage-taking branch stores and takes heat passing through the heat storage-taking branch through the corresponding heat storage-taking unit. According to the heat supply system and method adopting heat-storage auxiliary peak-regulation and used for the coal-fired power generator set, in the case of valley electricity, the heat of steam is stored into a heatstorage body by regulating steam extraction; and in the case of peak electricity, the heat supply amount of the steam extraction is avoided or reduced, a heat supply load is met by virtue of the heatstored in the heat storage body, and steam in a steam turbine is completely used for applying work to meet the requirements of an electricity network, so that thermoelectric decoupling is realized toa certain extent.
Owner:GUODIAN LONGYUAN ENERGY SAVING TECH
Thermoelectric decoupling type thermal energy storage heat and power combined supply system
PendingCN109026220AIncrease diversityGuaranteed reliabilitySteam useCombined combustion mitigationElectricityPower station
The invention discloses a thermoelectric decoupling type thermal energy storage heat and power combined supply system, and relates to heat and power combined supply systems. The problem that in the prior art, power source power supply or electric heating related equipment fails, and the system cannot store heat is solved. The system comprises an energy storage power station unit, a steam turbine unit and a heat supply unit; the energy storage power station unit comprises a low-temperature medium tank, a high-temperature medium tank, an electric heater and a gas heater, heat storage media are stored in the low-temperature medium tank and the high-temperature medium tank, the low-temperature medium tank is connected with a low-temperature medium output pipeline, the low-temperature medium output pipeline passes through heating ends of the electric heater and the gas heater and then enters the high-temperature medium tank, and a cooling medium pump is arranged on the low-temperature medium output pipeline and used for pumping low-temperature heat storage media. The gas heater in parallel connection with the electric heater is arranged, and when the power source power supply or electric heating related equipment fails, the gas heater can be used in a switched manner.
Owner:中国船舶重工集团公司第七0三研究所
Heat supply system
PendingCN108167914ASimple structureReasonable designLighting and heating apparatusWaste gas energyEngineeringTurbine
The embodiment of the invention discloses a heat supply system comprising a turbine unit (11), a heat pump device (12), a circulating water device (13) and a heat supply device (14); the turbine unit(11) is connected to the circulating water device (13) used for absorbing heat from the turbine unit (11); the heat pump device (12) is connected to the circulating water device (13), and used for absorbing the heat from the circulating water device (13); the heat supply device (14) is connected to the heat pump device (12) used for absorbing the heat from the circulating water device (13) and transferring the heat to the heat supply device (14) for heat supply. Through increase of the heat pump device between the turbine unit and the circulating water device, the problem that the overall turbine needs to be modified during improvement of the heating capacity of a thermal power unit is solved, and the beneficial effects of simple system structure, rational design and reliable performance are achieved.
Owner:YANTAI LONGYUAN POWER TECH
Thermoelectric unit thermoelectric decoupling system and operation method
ActiveCN112484129AAchieve thermoelectric decouplingIncrease flexibilityLighting and heating apparatusSpace heating and ventilation detailsThermodynamicsProcess engineering
The invention discloses a thermoelectric unit thermoelectric decoupling system and an operation method. The system comprises a hearth, a heat exchange boiler and a heating station. A water outlet of the heat exchange boiler communicates with a third pipeline and a fourth pipeline, the third pipeline communicates with a water inlet of the heating station, and a water outlet of the heating station communicates with a fifth pipeline. The fifth pipeline is used for communicating with a circulating water inlet of a heat supply network user, the fourth pipeline communicates with the fifth pipeline,the water inlet of the heating station further communicates with a seventh pipeline, the seventh pipeline is used for communicating with a circulating water outlet of the heat supply network user, a water inlet of the heat exchange boiler communicates with a sixth pipeline, the sixth pipeline communicates with the seventh pipeline, a third valve is arranged on the third pipeline, a fourth valve isarranged on the fourth pipeline, a sixth valve is arranged on the sixth pipeline, and a seventh valve is arranged on the seventh pipeline. Thermoelectric decoupling of a thermoelectric unit is realized, and flexibility of the thermoelectric unit is improved.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
Heat supply system
PendingCN107091489AAchieve reuseAddress heating load effectsLighting and heating apparatusHot-water central heatingHeating seasonEngineering
The invention discloses a heat supply system which comprises a condenser, a first circulating water pump, a second circulating water pump and an electric heat pump system. Condensate water heated by the condenser to first temperature serves as heat source water of the electric heat pump system and is output into evaporators of electric heat pumps of the electric heat pump system through the first circulating water pump; the heat source water of the first temperature of the evaporators is reduced to heat source water of second temperature to extract heat, and the heat extracted from the evaporators is transmitted to heating return water through condensators of the electric heat pumps, and the temperature of the heating return water is increased to fourth temperature from third temperature; and the heating return water of the fourth temperature is output to a heating water supply end by the electric heat pump system to be used for heat supply. Compared with the tradition, according to the heat supply system, the electric heat pumps are adopted as equipment for increasing the heat grade, heat in the condenser is input into the electric heat pumps, high-grade heat is obtained through conversion and used for heat supply, and therefore the influence of electric loads of a thermal power generating unit on heat supply loads in the heat supply season is solved, and thermoelectric decoupling is achieved.
Owner:YANTAI LONGYUAN POWER TECH
Fuel cell combined heat and power generation microgrid day-ahead scheduling method based on dynamic planning
ActiveCN112510682ASupply and demand balanceAchieve thermoelectric decouplingDc network circuit arrangementsSingle network parallel feeding arrangementsPrime moverMicrogrid
Owner:SOUTHEAST UNIV
Supercritical CO2 combined heat and power generation system and method integrated with multi-stage compression heat pump
PendingCN114718680AImprove COPReduce heat transfer temperature differenceSteam useEnergy industryElectrolysisCogeneration
The invention provides a supercritical CO2 combined heat and power generation system and method integrated with a multi-stage compression heat pump, the supercritical CO2 combined heat and power generation system comprises a supercritical CO2 cycle power generation system, an outlet of a main compressor is sequentially communicated with a low-temperature heat regenerator, a high-temperature heat regenerator, a boiler and a turbine, and an outlet of a precooler is communicated with an inlet of the main compressor; an inlet of the auxiliary compressor communicates with a hot side outlet of the low-temperature regenerator, and an outlet of the auxiliary compressor communicates with a cold side outlet of the low-temperature regenerator. The multi-stage compression heat pump assemblies in the heat supply system are connected in series stage by stage, the hot ends of the multi-stage compression heat pump assemblies communicate with the supercritical carbon dioxide cycle power generation system, and the cold ends of the multi-stage compression heat pump assemblies communicate with the condenser. The multi-stage compression heat pump is adopted to recover waste heat of the cold end, so that irreversible loss of heat transfer is greatly reduced, quality-divided gradient utilization of energy is achieved, and the energy utilization efficiency of the system is greatly improved. In addition, thermoelectricity decoupling can be achieved, and the operation flexibility of the system is greatly improved.
Owner:XIAN THERMAL POWER RES INST CO LTD
Steam extraction and heat supply regulation and control method for secondary heating steam turbine generator unit
ActiveCN114183807AWide temperature rangeAchieve thermoelectric decouplingSuperheating controlLiquid degasificationElectrolysisProcess engineering
The invention belongs to the technical field of heat supply, power generation and control analysis of heat supply and power generation, and particularly relates to a steam extraction and heat supply regulation and control method for a secondary heating steam turbine generator unit. The heat supply steam flow requirement is met by controlling the steam extraction flow of the secondary heating cold section steam extraction pipe and the steam extraction flow of the secondary heating hot section steam extraction pipe, the steam quantity proportion of the secondary heating cold section steam extraction pipe and the secondary heating hot section steam extraction pipe is adjusted in real time, and the temperature changes correspondingly after different steam extraction quantity proportions of the secondary heating cold section steam extraction pipe and the secondary heating hot section steam extraction pipe are mixed. Heat supply steam of different temperature grades can be met; and the temperature of the heat supply steam is adjusted in combination with the vapor-liquid two-phase heat exchanger, so that the temperature range of the heat supply steam is expanded. And meanwhile, external steam supply can be realized without grid connection of the unit, and thermoelectric decoupling is realized.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
An energy-saving thermoelectric decoupling system and its operating method
ActiveCN108361086BIncrease flexibilityIncrease heat loadSuperheating controlSteam useElectrolysisDeaerator
Owner:XI AN JIAOTONG UNIV
A heating system of a gas-steam combined cycle thermal power plant
ActiveCN109945268BAchieve thermoelectric decouplingTo meet the change of heating loadLighting and heating apparatusSpace heating and ventilation detailsElectrolysisCogeneration
The invention belongs to the technical field of combined heat and power generation, and discloses a heat supplying system of a fuel gas-steam combined circulation heat power plant. The system comprises three heat exchangers, and has three heat supplying modes connected in parallel; according to the first heat supplying mode, part of steam is introduced into one of the heat exchangers; according tothe second heat supplying mode, part of steam is introduced into the three heat exchangers in sequence; and according to the third heat supplying mode, all steam is introduced into the three heat exchangers in sequence. According to the heat supplying system of the fuel gas-steam combined circulation heat power plant, by adjusting steam inflow of a steam turbine of the fuel gas-steam combined circulation heat power plant, flexible switching of three heat supplying running modes is achieved, and therefore changing of heat supplying loads is achieved; and the problem that heat and electricity loads of the fuel gas-steam combined circulation heat power plant are not matched is effectively solved, and thermoelectric decoupling is achieved.
Owner:TAIYUAN UNIV OF TECH
A heat supply system that flexibly regulates the steam inlet of the steam turbine in a coal-fired heat-supply power plant
ActiveCN109779705BAchieve thermoelectric decouplingFlexible switchingLighting and heating apparatusSpace heating and ventilation detailsElectrolysisCogeneration
The invention belongs to the field of cogeneration of heat and power, and specifically discloses a heat supply system for flexibly regulating the steam intake of a steam turbine in a coal-fired heat supply power plant. Heat exchange with the water supply of the primary pipe network, the second heat supply method is to exchange heat with the water supply of the primary pipe network through the main steam, reheat steam and medium pressure cylinder exhaust steam, and the third heat supply method is through the main steam And the reheated steam exchanges heat with the feed water of the primary pipe network. Various heating modes can be switched flexibly to ensure that the system meets the heating demand in the most economical mode of operation; it can effectively solve the problem of mutual constraints between thermal and electrical loads in coal-fired thermal power plants, and realize thermoelectric decoupling.
Owner:TAIYUAN UNIV OF TECH
A kind of thermoelectric decoupling system and operation method
ActiveCN108035776BIncrease flexibilityIncrease heat loadSteam useEngine componentsProcess engineeringCondensate pump
The invention discloses a thermoelectric decoupling system and an operating method thereof. The system comprises a boiler, a steam turbine high-pressure cylinder, a steam turbine middle-low-pressure cylinder, a steam condenser, a condensate pump and a heat regenerative system which communicate with one another in sequence, and further comprises a generator, a condenser, an evaporator and an absorber which communicate with one another in sequence to form a circulating loop to form an absorption type heat pump. Flow of main stream which enters the generator is regulated by a main steam ejector high-pressure steam regulating valve which is connected with a main steam ejector inlet, and a main steam ejector by-pass regulating valve; flow of reheated steam which enters the generator is regulated by a reheated steam ejector high-pressure steam regulating valve which is connected with a reheated steam ejector inlet, and a reheated steam ejector by-pass regulating valve; and the regulating target is that a proportion of main steam flow to reheated steam flow, which enters the generator, is equal to a proportion of main stream flow, which enters the steam turbine high-pressure cylinder fromthe boiler, to reheated steam flow which enters the steam turbine middle-low-pressure cylinder. The thermoelectric decoupling system is small in system investment and is high in energy utilization efficiency.
Owner:HUANENG POWER INT INC +1
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