35results about How to "Avoid Heat Transfer Deterioration" patented technology

A flow control type impact transpiration cooling nose cone comprises a porous nose cone and a flow control cone core; the porous nose cone is a circular cone; a conical blind hole is formed in the bigend of the porous nose cone; the flow control cone core is a circular cone; the flow control cone core is inserted into the conical blind hole of the porous nose cone; a cavity is formed between thehead of the flow control cone core and the bottom of the conical blind hole of the porous nose cone; a through hole is formed in the flow control cone core in the axis direction and used for enablinga coolant to flow into the through hole from the big end of the circular cone of the flow control cone core and flow out of the through hole from the small end; and the big end of the flow control cone core is connected with an aircraft downstream cabin section. According to the flow control type impact transpiration cooling nose cone, by using a transpiration cooling and impact cooling principle,the temperature of the nose cone part of an aircraft is reduced so that ablation deformation cannot be generated; and requirements on long-time, long-distance and repeated use of the aircraft are satisfied.

The invention provides a supplementary combustion chamber of a supercritical pressure gas-liquid fuel generator, and relates to oil extraction equipment in an oil field. The supplementary combustion chamber is characterized by comprising a pre-combustion chamber (6), a secondary combustion chamber (10) and a vaporizing chamber (14). A spouting mode of fuel of the supplementary combustion chamber is as follows: the pre-combustion chamber (6) only sprays part of the fuel and full air for oxygen-enriched combustion; the remaining fuel is sprayed into the secondary combustion chamber (10) from a supplementary combustion inspirator and completely combusted with oxygen-enriched gas from the pre-combustion chamber in the secondary combustion chamber (10). By the combustion chamber, simultaneous combustion of gas fuel and liquid fuel is realized, and heat transfer deterioration is prevented due to various cooling modes.

The invention relates to a self-cleaning high-salt wastewater evaporative crystallization device. The evaporative crystallization device comprises a heater (1), an injection pump (3), a self-cleaning medium (4), a solid-liquid separating chamber (5), an evaporative crystallization chamber (6), a steam compressor (7), a strong brine pump (8) and a material water pump (9). By adopting the evaporative crystallization device, because the self-cleaning medium flows continuously in a heat transfer pipe of the heater and rubs and crashes the inner wall of the heat transfer pipe continuously, the dirt deposited on the inner wall of the heat transfer pipe is peeled off, and the self-cleaning medium is drained out of a heating chamber together with the material water, and thus the purpose of self-cleaning of the device is achieved; with the adoption of the evaporative crystallization device, the problem of scaling of the heat transfer pipe can be solved, and thus the heat transfer deterioration of the heat transfer pipe can be avoided, the heating exchanging property of the heater is enhanced, the usage rate of the wastewater evaporative crystallization device is improved, the work load of on-site maintenance is reduced, the dosage of chemicals is reduced, and meanwhile the pressure of environment pollution is reduced; and the wastewater evaporative crystallization is simple in structure, low in machining and manufacturing cost, and easy and convenient to mount and demount.

The invention discloses a high-power concentrating photovoltaic thermal control device. The high-power concentrating photovoltaic thermal control device comprises a radiator and a water tank, whereina circulating pipeline arranged on the radiator is arranged inside the water tank, and heat exchange is carried out between a heat-carrying working medium in the circulating pipeline and water in thewater tank; the high-power concentrating photovoltaic thermal control device is characterized in that the radiator further comprises a heat absorption surface and a heat dissipation part, wherein theheat dissipation part is arranged on one side of the heat absorption surface, and a medium inlet and a medium outlet are formed in the heat dissipation part; the circulating pipeline is connected to the medium inlet and the medium outlet; and fins are arranged in the radiator and gaps formed by the adjacent fins are equal. The technical scheme provided by the invention is used for temperature control of a concentrating photovoltaic power generation battery; the high-power concentrating photovoltaic thermal control device is reasonable in structure, and the heat-carrying working medium is usedfor taking away heat from the heat absorbing surface so as to achieve the purpose of temperature control, so that the service life of the battery is guaranteed, and the reliability and the efficiencyof concentrating photovoltaic power generation are improved; and in addition, the heat taken away by the heat-carrying working medium is stored in water in the water tank, so that waste is reduced, and the utilization rate of energy is improved.

The invention discloses a variation micro-channel cooling type surface flame low NOx gas device, which comprises an upper and lower header, a variation structure water-cooling component, and a plurality of compact gas-cooling components constructed by the upper and lower headers and multiple groups of variation structure water cooling components arranged in parallel. Variation airflow microchannel, and water inlet and water outlet respectively connected with the upper and lower headers. The gas and air mixture flows through the dense variable airflow microchannel and then ignites and burns. However, due to the heat absorption of the variable structure water cooling component, the flame front of the gas flow burns at the low temperature surface of the variable airflow microchannel outlet and the surface of the variable structure water cooling component, significantly reducing the airflow combustion temperature , and then achieve low-temperature and low-NOx combustion; at the same time, the variation structure of the gas flow microchannel significantly promotes the disturbance of the flame gas flow, and is combined with the dense variation structure water-cooling component and the variation gas flow microchannel to effectively prevent tempering and defiring, thereby achieving low temperature At the same time, low NOx surface combustion eliminates local high temperature phenomenon and ensures stable, safe and efficient combustion.

The invention discloses a partial jet flow small circulating ratio pipe casing type high temperature waste heat steam boiler. The partial jet flow small circulating ratio pipe casing type high temperature waste heat steam boiler comprises a boiler cylinder and a pipe casing type evaporation heat exchanger which are vertically arranged; the boiler cylinder and the pipe casing type evaporation heat exchanger are arranged in a horizontal type; the boiler cylinder and the pipe casing type evaporation heat exchanger are connected through an ascending pipe assembly and a declining pipe assembly; the boiler cylinder is connected with a water inlet connecting opening formed in the pipe casing type evaporation heat exchanger through a high temperature high pressure water pipe; a high temperature high pressure water pump is arranged on the high temperature water pipe. The partial jet flow small circulating ratio pipe casing type high temperature waste heat steam boiler has the advantages of being small in circulating ratio, efficient and energy saving, long in service life, small in occupied space, benefited to site installation and original facility reconstruction and reasonably utilizing high temperature flue gas waste heat in the chemical engineering field.

The invention relates to the technical field of water supplying control of supercritical units, and specifically relates to a rapid load fluctuation adapting type water supplying flow rate control method. The method is characterized in that the main steam flow rate is treated as a main input signal of water supplying control; the difference between target load of the unit and the target load afterspeed limitation, the deviation between the target main steam pressure and the actual main steam pressure, and the deviation between the target temperature and the actual temperature of an outlet ofa separator are overlapped and act on the set water supplying flow rate value; the coal quantity change and the water supplying quantity change are relatively independent; and intermediate point temperature deviation is added to correct the water supplying quantity. According to the method, sufficient water supplying flow rate and pressure are supplied by a water supplying system in running, so that the problems such as large main steam pressure fluctuation and high overshoot of a supercritical pressure circulating fluidized bed boiler can be solved; the cooling water quality of all heated surfaces and the power circulating stability of water in water cooling walls are protected; and the unit can work in an area under a pressure setting working condition. Therefore, the purpose of increasing the economic benefit of the unit is achieved.

The invention provides a heat exchange strengthening structure used for regenerative cooling of a supersonic combustion chamber through a spraying / convection composite type heat exchange mode. A double flow channel design is adopted, and the characteristic of the large heat flux of a spraying cooling mode is fully utilized to conduct heat exchange strengthening on the wall face of the combustion chamber. A scheme is composed of a double layer heat exchange scheme of the outer layer wall and the inner layer wall. A flow channel formed by partitioning of the outer layer wall and the inner layer wall is used for spray wall impingement strengthening heat exchange. Spraying nozzles are arranged on the inner layer wall. The number and distribution density of the spraying nozzles are determined according to the heat exchange strength and the heat exchange area. Part of heated liquid fuel and gaseous fuel formed by spray heat absorption are supplied to a nozzle of an engine combustion system in different phase states, and the liquid fuel is atomized in a mode of pneumatic atomization assisting. By adopting the design that a gas heat exchange flow channel and a liquid heat exchange flow channel are partitioned, the problem of flow supplying fluctuation caused by nonuniform gas and liquid distribution in the conveying process of the two phase flows of fuel after heat absorption to the combustion system is avoided.

The invention relates to a natural circulation split shell-and-tube waste heat boiler with optimized flow field layout, which includes a drum and a steam drum. The drum is divided into a flue gas inlet, a heat exchange chamber and a flue gas outlet; The water pipe is connected to the water collection pipe; the heat exchange chamber is arranged with a heat exchange tube bundle; the heat exchange chamber is divided into several heat exchange units by arranging vertical support baffles, and each heat exchange unit is connected to the steam drum through a riser pipe. The upper ends of the ascending tubes extend into the steam drum and are always above the liquid level in the steam drum; there are tube holes on the support baffle for the passage of the heat exchange tube bundle, and there are holes between the tube holes on the lower part of the support baffle. The baffle hole; the steam drum is provided with a steam drum water supply port and several steam outlets; the steam drum is connected with the water collection pipe through the downpipe. The invention can solve the problem that the vapor-liquid two-phase flow in the middle and lower drum of the split-tube shell type waste heat boiler is disordered and the vapor-liquid two-phase flow in the rising pipe is stagnant or even reversed.

The invention discloses an external cooling system for a pressure vessel used in a floating nuclear power plant, which belongs to the technical field of nuclear reactor engineering and includes a containment vessel, a pressure vessel, a liquid gallium collection box, a heat pipe, a cooling cabin and a gallium storage box; the containment vessel is arranged in the sea environment, the containment vessel has a containment chamber; the pressure vessel and the liquid gallium collection tank are arranged up and down, and are located in the containment chamber of the containment vessel; one end of the heat pipe is inserted in the liquid gallium collection box, and the other end is arranged outside the liquid gallium collection box; The gallium tank is located in the containment chamber of the containment vessel; the gallium storage tank communicates with the liquid gallium collection tank through the liquid gallium release valve; the cooling cabin is set at the lower end of the containment vessel and is located below the sea level in the sea environment. The invention does not face the risk of failure of the external cooling of the reactor vessel due to the loss of the heat sink, does not generate a large amount of steam inside the containment, avoids the problems of flow channel blockage and containment overpressure, and has the advantages of safety, stability and long-term operation.

The invention discloses a low-voltage and high-power pressurized water reactor fuel assembly simulation device, which comprises a pressure-bearing assembly, an electric heating assembly and a square flow channel. The square flow channel is arranged in the pressure-containing assembly and is sealed with the pressure-containing assembly. The electric heating component passes through the square flow channel and the pressure-bearing component at the same time, and is sealed and fixed with the pressure-bearing component. The device meets the requirements of high-temperature and high-pressure experiments, and maintains the thermal-hydraulic characteristics similarity with the reactor fuel assembly. It can realize the simulation process of the pressurized water reactor fuel assembly with low voltage and high power. It consumes less energy and simplifies the structure. It is used in pressurized water reactors. Fuel assembly critical heat flux and flow instability experiments to verify the thermal safety performance of the reactor.

The invention discloses a sludge continuous thermal hydrolysis membrane type wall reactor for a supercritical water oxidization system and belongs to the technical field of supercritical water oxidization. The sludge continuous thermal hydrolysis membrane type wall reactor comprises a barrel body, wherein an upper sealing head is arranged at the top of the barrel body and a lower sealing head is arranged at the bottom of the barrel body; a motor is mounted outside the upper sealing head; the barrel body is internally provided with a rotary shaft driven by the motor; the bottom of the rotary shaft is fixed on the lower sealing head; a sludge inlet is arranged on the upper sealing head and a sludge outlet is arranged at the bottom of the lower sealing head; the barrel body is internally further provided with a membrane type wall heat exchanger which is coaxial with the barrel body and is clung to a side wall of the barrel body; the rotary shaft is provided with a stirring device; the stirring device penetrates through a cavity of the membrane type wall heat exchanger; the upper sealing head is further provided with a hot fluid inlet and a hot fluid outlet; the hot fluid inlet and thehot fluid outlet are communicated with the membrane type wall heat exchanger. The sludge continuous thermal hydrolysis membrane type wall reactor is used for providing heat for sludge to raise the temperature of the sludge; thermal hydrolysis reaction occurs so that the viscosity is reduced; the technical problems in the aspects of sludge conveying, heat exchange and the like in the background technology are solved, so that the sludge continuous thermal hydrolysis membrane type wall reactor can be widely applied to the SCWO (Supercritical Water Oxidation) system for continuously treating thehigh-viscosity sludge.

The invention provides a 1000MW ultra-supercritical secondary reheat boiler with a high reheat steam temperature and width regulation ratio. The 1000MW ultra-supercritical secondary reheat boiler comprises a boiler body, a primary reheat low-temperature reheater, primary reheat wall type reheaters, a primary reheat high-temperature reheater, a secondary reheat low-temperature reheater, secondary reheat wall type reheaters and a secondary reheat high-temperature reheater, wherein the primary reheat low-temperature reheater, the primary reheat wall type reheaters and the primary reheat high-temperature reheater are sequentially connected, and the secondary reheat low-temperature reheater, the secondary reheat wall type reheaters and the secondary reheat high-temperature reheater are sequentially connected. The boiler body comprises a hearth and an outlet flue. The primary reheat wall type reheaters are symmetrically arranged on a front wall and a rear wall of a vertical water cooling wall section in the hearth. The secondary reheat wall type reheaters are symmetrically arranged on a left wall and a right wall of the vertical water cooling wall section in the hearth. The boiler is simple in structure and low in cost; the reheat steam temperature is greatly improved; the outlet exhaust temperature of an air pre-heater is reduced; exhaust heat losses are reduced; and therefore the efficiency of the boiler is improved, power supply coal consumption is reduced, and the economic efficiency and safety of running of a unit are guaranteed.

The invention relates to a gradual vapouration type high-energy-efficiency direct-flow steam injection boiler and a method. The technical scheme of the invention is that the steam injection boiler mainly consists of four modules and an accessory, wherein the four modules comprise a radiation water-cooled module, a gradual vapouration module, a water pipe convection module and a smoke pipe water bath module; the radiation water-cooled module is placed on the bottom of the center of the boiler in a horizontal manner, a front-end opening of the water-cooled module is butted with a burner, and a tail-end upper opening is connected with the bottom of the gradual evapouration module; a front-side opening in the horizontal direction of the gradual vapouration module is connected with the water pipe convection module, and the rear side of the water pipe convection module is connected with the smoke pipe water bath module by a front smoke box; and the smoke pipe water bath module is of a square structure, and is connected with a chimney by a rear smoke box. The boiler and the method have the beneficial effects of preventing a heat transmission exacerbation phenomenon from being generated from fundamentality, greatly reducing tube exploding probability, promoting safety and stability, solving the problem that the heat transmission exacerbation easily exists in a large specific heat region under supercritical pressure, and the energy is saved and the consumption is reduced so as to be beneficial for environmental protection.