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52 results about "Calcifuge" patented technology
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A calcifuge is a plant that does not tolerate alkaline (basic) soil. The word is derived from the Latin 'to flee from chalk'. These plants are also described as ericaceous, as the prototypical calcifuge is the genus Erica (heaths). It is not the presence of carbonate or hydroxide ions per se that these plants cannot tolerate, but the fact that under alkaline conditions, iron becomes less soluble. Consequently, calcifuges grown on alkaline soils often develop the symptoms of iron deficiency, i.e. interveinal chlorosis of new growth. There are many horticultural plants which are calcifuges, most of which require an 'ericaceous' compost with a low pH, composed principally of Sphagnum moss peat.
Method for producing active pulverized lime by utilizing coal gas to calcine limestone through suspended state pre-heating decomposing furnace
The invention relates to a method for producing active pulverized lime by utilizing coal gas to calcine limestone through a suspended state pre-heating decomposing furnace, which belongs to the field of environment protection production of building materials. The method comprises the voltage stabilizing and conveying process of coal gas, the combustion heating process of the coal gas in a decomposing furnace for sufficiently combusting the coal gas in the suspended state pre-heating decomposing furnace to obtain the active quicklime powder as staflux in the lime calcining production, and the process for cooling the lime by a grate type cooler. Coke-oven coal gas, blast furnace coal gas, converter coal gas and mixed coal gas in the metallurgy production process are respectively adopted as fuel for replacing the coal powder in the traditional process for calcining and decomposing the lime powder. The method solves the problem of environment pollution caused by coal firing, improves the utilization rate of the excessive coal gas generated during steel making, reduces the outwards discharge of the coal gas, simultaneously improves the production efficiency and the heat efficiency of the lime calcination, and improves the activity of the lime.
Owner:SHANDONG IRON & STEEL CO LTD
Lime powder suspension calcining production line and suspension calcining process thereof
The invention relates to a lime powder suspension calcining production line and a suspension calcining process thereof. The production line comprises a crushed limestone storage device, a limestone powder preparation device, a feeding device, a suspension calcining cooling device, a fuel supply device, a screening device, a finished product storage device and a waste gas treatment device. The suspension calcining cooling device comprises five stages of heating hoppers, a decomposition furnace and three stages of cooling hoppers. The heating hoppers, the decomposition furnace and the cooling hoppers are communicated through a cyclone feeding pipe, a cyclone return pipe, a material pipe and an inverted-U-shaped air pipe on the top of the decomposition furnace to form an air duct, a draught fan and the fuel gas supply end of the fuel supply device are connected through the air duct, suspension calcining is carried out in the decomposition furnace, the temperature of suspension calcining ranges from 850 DEG C to 1,000 DEG C, the calcining time is within 10 seconds, finally, materials are discharged through the material pipe of the cooling hopper at the tail stage, the materials are screened through the screening device, and then finished lime powder is obtained. The whole production process is in a closed type, environment friendliness is achieved, the heat utilization rate of suspension calcining is increased, and therefore production efficiency and production quality are guaranteed.
Owner:ZHEJIANG CALCIUM TECH CO LTD
Process and system for preparing high-strength blocky active lime from carbide slag
Owner:ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
System and method for calcining cement clinker through lignite safely in large amount
ActiveCN104326688AAvoid explosion riskReduce the chance of spontaneous combustionDispersed particle filtrationInert gas productionCold airCombustor
The invention discloses a system and a method for calcining a cement clinker through lignite safely in a large amount. The system includes a kiln head raw coal grinding system and a kiln tail raw coal grinding system. The kiln head raw coal grinding system is connected to a kiln head burner and the kiln tail raw coal grinding system is connected to a kiln tail burner. The method includes following steps: (1) grinding bituminous coal or anthracite through the kiln head raw coal grinding system and adding the grinded bituminous coal or anthracite to the kiln head burner for employing the grinded bituminous coal or the anthracite as coal used in rotary kiln; and (2) grinding the lignite through the kiln tail raw coal grinding system and adding the grinded lignite to the kiln tail burner for employing the grinded lignite as coal used in decomposing furnace. The system and the method are advantaged in that the lignite is used for calcining the cement clinker in a large amount so that a production cost is greatly reduced. By means of the method, nitrogen oxide generated during calcination of the cement is greatly reduced. By means of a CO2 explosion-proof device, fire can be extinguished and prevention of explosion is actually achieved. Possibility of fresh air entering the system is reduced since a cold air valve is removed, thereby improving safety.
Owner:海拉尔蒙西水泥有限公司
Technique for using dry discharging carbide slag to completely substitute natural calcareous raw material for producing cement chamotte
ActiveCN101265041BSolve the problem of environmental pollution that is difficult to deal withSolve pollutionCement productionSlagCalcination
The invention discloses a method for producing cement clinkers from dried carbide slag completely instead of natural limy materials, which relates to the field of building materials. Firstly, three auxiliary materials (including sand rock, coal ash and sulfur acid residue) are compounded, pulverized and sieved, and the fine powder is fed into a dryer. Then, the carbide slag with a water content less than or equal to 12% is fed into the dryer, and undergoes intensive heat exchange with the hot flue gas at the charge side, realizing complete drying and mixture. The crude material powder is fed into first-stage, second-stage and third-stage cyclone cylinders to undergo multiple suspension heat exchange with the hot flue gas, and then enter a rotary kiln for calcination. The hot flue gas inside the klin undergoes the heat exchange in a pipeline calciner and a wind pipe and then reversely flows into the third-stage, second-stage and first-stage third-stage cyclone cylinders, the dryer, a cyclone dust collector, a system fan and an airbox pulse bag-shaped dust collector sequentially, and the purified gas is discharged into the external atmosphere. The coal powder jets into the calciner at the charge side for further combustion, and the crude material powder undergoes decomposition reactions: Ca(OH)2-H2O+CaO. The clinker burned in the rotary kiln is cooled by a grate cooler and then delivered to a clinker storage room. In the invention, the waste carbide slag is completely dried by using the exhaust gas at the discharge side, and the heat consumption for clinker combustion is reduced by about 25%, thereby realizing energy conservation and exhaust reduction.
Owner:新疆凯盛建材设计研究院(有限公司)
Method for preparing lime by using byproduct calcium carbonate obtained from preparation of ammonium sulfate by phosphogypsum as raw material
The invention relates to a method for preparing lime by using a byproduct calcium carbonate obtained from preparation of ammonium sulfate by phosphogypsum as a raw material. The method comprises the following steps that (1) the byproduct wet-based calcium carbonate obtained from preparation of ammonium sulfate by phosphogypsum is fed to a third-level cyclone preheater for heat transfer and drying with decomposed exhaust gases; (2) dried materials in the previous step enters a decomposing furnace, pulverized coal and air are sprayed to the decomposing furnace by a pulverized coal preparation system to combust in the decomposing furnace to generate high-temperature flue gas at 1200 DEG C, the materials are heated and decomposed to CaO and CO2, and the exhaust gases generated by the decomposing furnace are fed to the third-level cyclone preheater in the previous step; (3) lime generated by decomposition enters a third-level cyclone cooler; (4) lime discharged out of the cooler is fed to a limit finished product storeroom; (5) the exhaust gases after heat exchange in the first step are fed to a bag type dust collector to be dedusted, and purified qualified exhaust gases are discharged to a chimney. The method provided by the invention is simple, remarkable in effect and applicable to manufacturers with devices for preparation of ammonium sulfate by phosphogypsum and sewage treatment devices.
Owner:WENGFU (GRP) CO LTD
Self-adaptive low-nitrogen calcination control system for cement kiln and method thereof
InactiveCN112429989ASolve the hysteresisSolve problems such as large fluctuationsRotary drum furnacesCement kilnClinker (cement)
The invention discloses a self-adaptive low-nitrogen calcination control system for a cement kiln and a method thereof, and the system comprises a pre-decomposition system, a rotary kiln system and anintelligent control system, and the pre-decomposition system collects related parameters in a decomposition furnace and transmits the related parameters to the intelligent control system. The intelligent control system controls and adjusts the total coal feeding amount, the distribution amount of several coal feeding points and the distribution amount of different feeding points according to corresponding parameters; the rotary kiln system collects relevant parameters in the rotary kiln and transmits the relevant parameters to the intelligent control system, and the intelligent control systemcontrols the frequency of a primary air fan, the kiln head coal feeding amount and the opening ratio of air valves inside and outside a combustor according to the corresponding parameters. Accordingto the method, the clinker yield and quality and NOx emission are closely related and deeply fused for the first time, the effect of actively adjusting and controlling the NOx emission is achieved, the problems of hysteresis quality, large fluctuation and the like of a manual control system are solved, the production cost is remarkably reduced, the stability of the yield and quality is improved, NOx emission is reduced by over 35% in the comprehensive process, and the tail end treatment cost of NOx is effectively reduced.
Owner:HEFEI CEMENT RES DESIGN INST
Denitrification method using decomposing furnace and decomposing furnace
InactiveCN110092598AReduced risk of crustingReduce manufacturing costGas treatmentDispersed particle separationDecompositionNitrogen gas
The invention relates to a denitration method using a decomposing furnace and the decomposing furnace. The method comprises the following steps: coal powder is injected from the lower end of the decomposing furnace and combusted under an anoxic condition to form an anoxic reducing atmosphere, and coal powder is injected from the upper end of the decomposing furnace and combusted to consume part ofoxygen at the upper end of a reducing atmosphere; tertiary air is sprayed into the decomposing furnace in streams to make the air excess coefficient be 0.3-0.6; a cement raw material is respectivelyput into the decomposing furnace from a plurality of feeding ports for carbonate decomposition, so that the temperature at the reducing atmosphere is 900-1100 DEG C; exhaust gas is introduce from thatbottom end of the decomposing furnace for reduction denitration, and the reaction time is 0.5 to 1.2 seconds; and insufficiently combustible solid materials are guided to the decomposing furnace by refluxing with a reflux ratio of 20-45%. The denitration method using the decomposing furnace is simple and easy to operate, can reduce 60-85% of nitrogen oxides generated by a rotary kiln to nitrogen,has high reduction efficiency, effectively reduces the harm to the natural environment, does not affect the decomposition of carbonate in cement raw materials, can fully utilize materials, and savescost.
Owner:CHENGDU JINGLONG TECH
System for large production increasing, nitrogen reduction and consumption reduction of KHD type cement kiln
PendingCN111981859AReduce the problems of high resistance, material accumulation at bends, etc.Increase volumeMaintainance of heating chambersPreheating chargesThermodynamicsTube furnace
The invention discloses a system for large production increasing, nitrogen reduction and consumption reduction of a KHD type cement kiln, and relates to the technical field of cement production. A preheater system is reconstructed on the basis of an original dry method production line cement kiln, the large production increasing, lower power consumption, lower coal consumption and lower NOx emission of the system can be achieved. An original tube furnace is changed into a decomposing furnace with larger furnace capacity, a structural form and a furnace entering position of a tertiary air pipeare changed, and a new gooseneck pipe is added. According to the system disclosed by the invention, the furnace capacity of a decomposing furnace is larger, the retention time of raw materials in thepreheater is longer, the decomposition rate is increased, and production increasing is facilitated; a denitration reduction area is arranged in a new decomposing furnace cone, a production process ofcoal feeding in a tertiary air pipe is changed, and the situation that a large amount of NOx generated in the tertiary air pipe can only be reduced by using a denitration agent is avoided. By changingthe structural forms of the tertiary air pipe and the decomposing furnace, the resistance in the system is greatly reduced, the power consumption is correspondingly reduced, the furnace capacity is increased, the burn-off rate of pulverized coal is increased, and the coal consumption is reduced.
Owner:SHANDONG TAIAN HENGYE MACHINERY
Local calcium circulation and pure oxygen combustion coupling carbon capture device and process for cement production
ActiveCN113509834AReduce captureReduce difficulty of useProductsGas treatmentDust controlCarbonization
The invention discloses a local calcium circulation and pure oxygen combustion coupling carbon capture device and process for cement production, and the device comprises a preheater-carbonization furnace-rotary kiln module, a pure oxygen combustion decomposing furnace module and an auxiliary and purification device. The preheater-carbonization furnace-rotary kiln module comprises a raw material feeding device, a first-series cyclone preheater, a carbonization furnace, a second-series cyclone preheater, a smoke chamber, a rotary kiln, a tertiary air pipe, a rotary kiln combustor and a cooling machine. The pure oxygen combustion decomposing furnace module comprises a decomposing furnace, a decomposing furnace combustor, a third-series cyclone preheater and a booster fan. The auxiliary and purification device comprises a first SNCR (Selective Non Catalytic Reduction) device, a second SNCR device, an air distribution device, a first material distribution device, a second material distribution device, a first heat exchange device, a second heat exchange device, a condensation and water removal device, a CO2 collection and storage device, a dust removal device, an SCR (Selective Catalytic Reduction) device and a flue gas exhaust device. Through modular separation and coupling, the CO2 capture and utilization difficulty is reduced, and good economical efficiency is achieved.
Owner:SOUTH CHINA UNIV OF TECH
Method for producing active admixture by treating electrolytic manganese slag through non-homogenization process
ActiveCN110963722APromote healthy developmentTo achieve the purpose of effective comprehensive utilizationSolid waste managementSlagMaterials science
The invention provides a method for producing an active admixture by treating electrolytic manganese slag through a non-homogenization process. The method comprises the following steps of (1) the electrolytic manganese slag is continuously fed into a kiln tail smoke chamber through an air locking feeding system; (2) mineral adjusting material powder is preheated through a preheater system and is fed into a decomposing furnace, and then the mineral adjusting material powder is continuously fed into the kiln tail smoke chamber to be mixed with electrolytic manganese slag; (3) an electrolytic manganese slag and mineral adjusting material powder mixture enters a rotary kiln through the kiln tail smoke chamber, is further mixed in the kiln tail smoke chamber and the rotary kiln, and is calcinedat the same time to obtain cooked slag; and (4) the obtained cooked slag is discharged into a grate cooler from a kiln head of the rotary kiln, and is cooled to obtain the active admixture. Accordingto the method, dry-process rotary kiln cement production line equipment provided with the air locking feeding system is utilized, the non-homogenization process is adopted to treat the electrolytic manganese slag to produce the active admixture, and the electrolytic manganese slag does not need to be dried and ground, so that a large amount of energy consumption can be saved; components such as silicon, aluminum, iron, calcium and calcium sulfate in the electrolytic manganese slag are effectively utilized; volatile pollutants are prevented from polluting the environment; and the production investment is low.
Owner:湖南省小尹无忌环境能源科技开发有限公司
Novel countercurrent stepped solid waste pre-calcining device for dry-process clinker line decomposing furnace
PendingCN114518038AAffect normal operationImprove qualityCement productionIncinerator apparatusProduction lineClinker (waste)
The invention discloses a novel countercurrent stepped solid waste pre-calcining device for a dry clinker line decomposing furnace in the field of solid waste pre-calcining devices.The countercurrent stepped solid waste pre-calcining device comprises a countercurrent stepped calcining furnace and an air cannon, and the lower right portion of the countercurrent stepped calcining furnace is in a stepped shape; an air cannon is arranged at each step on the outer side of the countercurrent step type calcining furnace, the air cannon is used for blowing solid waste to turn over and enter the next step from the previous step, a ventilation opening communicated with the decomposing furnace is formed in the left lower part of the countercurrent step type calcining furnace, and a solid waste discharging pipe is arranged at the top of the countercurrent step type calcining furnace; an air outlet pipe communicated with the upper part of the decomposing furnace is arranged at the right upper part of the countercurrent stepped calcining furnace; according to the device, solid waste can be dispersed and fully combusted, and a guarantee is provided for normal operation of a system and a production line.
Owner:ANHUI CONCH DESIGN & RES INST OF BUILDING MATERIALS CO LTD
Low nitrogen type decomposition furnace and method for reducing nitrogen oxide concentration in clinker calcination process
PendingCN111664702AAchieve emission reductionAvoid burnsGas treatmentDispersed particle separationLow nitrogenCement kiln
The invention provides a low nitrogen type decomposition furnace and a method for reducing the nitrogen oxide concentration in the clinker calcination process. The technical problems that in the cement line production in the prior art, the denitration treatment of flue gas corresponding to clinker production consumes a large amount of ammonia water, and the denitration cost is high are solved. Thedecomposition furnace comprises a furnace body, the furnace body comprises an upper pipe section, a middle pipe section, a lower pipe section and a cone pipe section from top to bottom in sequence; the lower pipe section is connected with an upper coal injection pipe for pulverized coal feed and a third air main pipe, and is connected with a low position material separation pipe for raw materialfeed; and the third air main pipe is connected with a lower pipeline of the furnace body, and the third air main pipe is further connected with a third air branch pipe. According to the low nitrogen type decomposition furnace and the method for reducing the nitrogen oxide concentration in the clinker calcination process, an intermediate product produced in the process of fuel combustion is used for denitration, no additional denitration reducing agent is used, the emission of flue gas pollutants can be fundamentally reduced, the amount of ammonia water consumed by flue gas denitration in a cement kiln can be reduced accordingly, so that the operation cost of denitration is reduced.
Owner:华润水泥技术研发(广西)有限公司
System and method for preparing powdery active lime by modifying cement clinker production line
The invention discloses a system and method for preparing powdery active lime by modifying a cement clinker production line. The system comprises a grinding unit and a homogenizing silo which are communicated with each other, and also comprises: a preheating unit for drying ground limestone powder, a decomposing furnace for calcining the limestone powder, and a suspension cooling unit for cooling the calcined limestone powder, wherein the material outlet of the decomposing furnace is connected with a cyclone cylinder for gas-solid separation, and the material outlet of the cyclone cylinder is connected with the material inlet of the suspension cooling unit. According to the method, by using suspension cooling, the overall heat exchange efficiency is high, energy consumption is low, heat of high-temperature lime at an outlet of the decomposing furnace is recycled to the maximum extent in a multi-stage cooling series connection mode, the cooling air volume is small, and the temperature of air returning to the decomposing furnace is high; and original equipment and systems of the cement clinker line can be fully utilized, so that the transformation amount is small, and the provided method enables the lime production capacity to be large.
Owner:SINOMA INT ENG
A method for producing active admixtures by treating electrolytic manganese slag with a non-homogenization process
ActiveCN110963722BPromote healthy developmentTo achieve the purpose of effective comprehensive utilizationSolid waste managementSlagPhysical chemistry
Owner:湖南省小尹无忌环境能源科技开发有限公司
Anaerobic decompose furnace for domestic garbage
ActiveCN110699104ALow energy consumption for decompositionDecomposition is sustainableCoking carbonaceous materialsMechanical engineeringDomestic waste
The invention discloses a domestic garbage anaerobic decomposing furnace. The furnace comprises an inner cylinder, an outer cylinder, a driving mechanism, a first feeder, a second feeder and a discharging machine, both the outer cylinder and the inner cylinder are horizontal, the driving mechanism drives that out cylinder to rotate, the inner cylinder and the outer cylinder are coaxially fixed inthe outer cylinder, a heating cavity is arranged between that rear end of the out cylinder and the inner cylinder, the inner cylinder is provided with a first inclined lifting plate, a second inclinedlifting plate is arranged in the outer cylinder, the discharge end of the first feeder passes through the front end of the outer cylinder and the front end of the inner cylinder in turn and then communicates with the inner cavity of the inner cylinder, the feeding end of the discharging machine passes through the rear end of the outer cylinder and the rear end of the inner cylinder in turn and iscommunicated with the inner cavity of the inner cylinder. The discharging machine has a gas outlet and a solid outlet, the solid outlet is communicated with the feeding end of the second feeder, thedischarging end of the second feeder is communicated with the heating cavity, and the front end of the outer cylinder is provided with a waste residue outlet. The domestic garbage anaerobic decomposing furnace provided by the invention can recycle and utilize the residual energy in the domestic garbage, has low energy consumption for garbage decomposition, and can continuously decompose the garbage.
Owner:四川中城建业环保科技有限公司
Technical method for stably reducing coal consumption of cement clinker firing
The invention discloses a technical method for stably reducing coal consumption of cement clinker firing, which comprises the following steps of: high-silicon rock is replaced with medium-silicon rockand silica by adjusting a raw material proportioning scheme; industrial waste yellow phosphorus slag is blended as a mineralizing agent; fan configuration of a grate cooler is optimized, quenching isenhanced, and the heat recovery efficiency is improved; a grate plate structure and grate cooler control are optimized, and the heat recovery efficiency is improved; a pipe diameter of the inflatablebeam air supply pipeline is enlarged, the air volume is increased, and the heat recovery efficiency is improved; through system air leakage treatment, the oxygen content of an outlet of a preheater C1 is reduced; a novel flap valve is used for reducing internal air leakage, and a kiln tail sealing device is modified from cylinder sealing to graphite sealing to reduce external air leakage; a novelspreading box is used for improving the dispersity of materials in a decomposing furnace and a preheater, so that the heat exchange efficiency is improved; the position of the furnace coal burner isoptimized, and the combustion efficiency and the burn-off rate of pulverized coal are improved by using the furnace coal burner with a novel structure. By implementing the method, the production costof the cement clinker is greatly reduced, and remarkable economic benefits are obtained.
Owner:攀枝花瑞峰水泥有限公司
System and process adopting regenerative heating furnaces to heat acidic circulating gas
PendingCN111829347APrevention and control and removal of carbon depositsAchieve recyclingFurnace typesGas emission reductionCarbon depositChemistry
The invention relates to a system and process adopting regenerative heating furnaces to heat acidic circulating gas. The system involves the regenerative heating furnaces, a mixing chamber, a decomposing furnace, a settling chamber, a metal film powder collector, a heat exchanger, a deacidification device and a chimney, wherein the two or more regenerative heating furnaces are arranged, each regenerative heating furnace is connected in parallel in a crossed mode, and each regenerative chamber heating furnace is switched between a combustion heat storage working state and a circulation heatingworking state. According to the system, a heat accumulator is heated, then the low-temperature acid gas is heated through the heat accumulator, the heated high-temperature acid gas enters the decomposing furnace, is mixed with iron-nickel nitrate compound and is subjected to a decomposition reaction to obtain a metal oxide, and the decomposed acid gas is recovered and recycled; and safety explosion-proof measures are set so that carbon deposition inside the regenerative heating furnaces can be effectively prevented, controlled and removed.
Owner:鞍钢集团工程技术有限公司
Cement production carbon capture device and process for local calcium circulation coupling waste disposal
PendingCN113120906AReduce the temperatureRealize emission reduction at sourceCarbon compoundsEnergy inputClinker (waste)Flue gas
The invention discloses a cement production carbon capture device and process for local calcium circulation coupling waste disposal, and belongs to the cross technical field of cement production, calcium cycle carbon capture and waste co-disposal. The cement production carbon capture device consists of an off-line decomposing furnace module, a preheater-carbonization furnace-rotary kiln module and an auxiliary and purification device. According to the carbon capture process, CO2 capture is completed by means of CaO-CaCO3-CaO circulation between a decomposing furnace and a carbonization furnace, the off-line decomposing furnace design is adopted, and SO2, chlor-alkali sulfur and other impurities generated in the clinker sintering and raw material preheating process are prevented from entering a decomposing furnace module. Meanwhile, waste is combined for cooperative treatment, the flue gas temperature is lowered, the CaO carbon sequestration rate and efficiency are improved, NOx generated by the rotary kiln is reduced through waste thermal cracking products, flue gas CO2 self-enrichment and multi-pollutant cooperative control under the air combustion condition are achieved, the follow-up CO2 purification and recycling difficulty is lowered, the technical economy is remarkably improved, and the popularization of carbon capture and recycling of the cement industry is powerfully promoted.
Owner:SOUTH CHINA UNIV OF TECH
CO2 zero-emission production process and system for calcining cement by using solar energy and hydrogen energy
PendingCN114249550AProduction continuesOvercoming Solar VolatilitySolar heating energyRotary drum furnacesClean energyEnergy conservation
The invention discloses a CO2 zero-emission production process and system for calcining cement by using solar energy and hydrogen energy, and the specific process is as follows: the solar energy is reflected to a heat collection energy storage device through a mirror field, the heat collection energy storage device focuses and stores energy, the collected kiln tail waste gas containing high-concentration CO2 gas is heated to 900-1200 DEG C and is conveyed into a decomposition furnace, and the decomposition furnace is heated to 900-1200 DEG C; the limestone is decomposed into calcium oxide, and high-concentration CO2 waste gas generated by decomposition enters a preheater system to preheat the limestone and then returns to the heat collection energy storage device; when the solar energy is sufficiently stored, decomposed calcium oxide is divided into two paths, one part of calcium oxide and auxiliary materials are mixed and enter a rotary kiln to be calcined, fuel of the rotary kiln adopts hydrogen energy, and flue gas discharged out of the kiln is collected through a cyclone; a part of calcium oxide enters the storage tank. According to the invention, solar energy and hydrogen energy clean energy with low energy consumption, low pollution and low emission are used for replacing traditional energy, so that the whole firing system has the effects of energy conservation, consumption reduction and zero emission of CO2 greenhouse gas.
Owner:TIANJIN CEMENT IND DESIGN & RES INST
Self-extraction method of cement calciner temperature based on bfcm-iwm fuzzy rules
ActiveCN107544578BAvoid difficultiesImprove applicabilityTemperature control using electric meansFurnace temperatureTemperature control
The invention discloses a cement decomposition furnace temperature control method based on BFCM-iWM fuzzy rule self-extraction. The method includes the steps that through analysis of the decompositionfurnace technology and on-site experience summarization, values related to the outlet temperature of a decomposition furnace are analyzed, and an outlet temperature control strategy of the decomposition furnace is determined; data in the operation process of the decomposition furnace is collected by inquiring an industrial field database; when the coal feeding amount of the decomposition furnaceis changed, elimination is conducted according to the condition and the 3 sigma criterion; the temperature deviation and the deviation change rate of the decomposition furnace and the domain range ofthe coal feeding increment of the decomposition furnace are determined after elimination; sample data is clustered by using a BFCM clustering method, and the credibility of the sample data is determined; a rule is extracted on the basis of the iWM method added with credibility; a fuzzy controller is built on the basis of the rule, and temperature control is achieved. According to the method, the rule is automatically extracted from the data by using the iWM method added with the data credibility, the subjectivity and limitation of manual rule making rule are avoided, and the accuracy and robustness of the rule are improved.
Owner:秦皇岛东辰科技有限公司
A system and method that uses industrial amateur heat associations to dispose of waste
ActiveCN114110608BIncrease combustionBurn fullyExhaust apparatusRotary drum furnacesFlue gasProcess engineering
The invention discloses a system and a method for co-processing waste by utilizing industrial waste heat, and belongs to the technical field of co-processing waste. It includes a pre-disposal furnace and a clinker calcination system for burning and disposing of waste. The tertiary air from the grate cooler is introduced into the pre-disposal furnace, and the top of the pre-disposal furnace is connected to the upper end of the calciner through a flue gas channel. The pretreatment furnace is provided with an oxygen-enriched air inlet; the oxygen-enriched air inlet faces the main combustion area of the pretreatment furnace and forms an included angle of 30°-45° with the level of the pretreatment furnace. The present invention adopts oxygen-enrichment to achieve an oxidative environment, allowing waste particles to be fully burned; and the excess oxygen-enriched gas is passed into the decomposition furnace through a flue gas pipeline, thereby providing favorable conditions for suppressing the production of sulfur dioxide in the decomposition furnace.
Owner:崇左南方水泥有限公司
System for increasing proportion of organic waste co-processed by cement kiln and processing method
PendingCN114484447ADoes not affect stable operationSave Disposal WasteLiquid degasificationFeed water supplyExhaust fumesProcess engineering
The invention discloses a system for increasing the proportion of organic waste co-processed by a cement kiln and a processing method. The system comprises a decomposing furnace, a tertiary air pipe communicated with the decomposing furnace, a high-temperature pre-processing system, a residue cooling and conveying system, a waste heat power generation system connected with the residue cooling and conveying system and a waste pre-processing system. A waste outlet of the waste pretreatment system is connected with a waste inlet of the high-temperature pretreatment system, a combustion air inlet of the high-temperature pretreatment system is communicated with a waste gas outlet of the waste pretreatment system and a branch pipe of a tertiary air pipe at the same time, and a smoke outlet of the high-temperature pretreatment system is connected into a decomposing furnace. A residue outlet of the high-temperature pre-treatment system is communicated with an inlet of the material distributing device, and an outlet of the material distributing device is connected into the decomposing furnace and the residue cooling and conveying system at the same time. According to the system, the adaptability and the treatment proportion of the cement kiln to the organic waste are improved, and the comprehensive treatment requirements of the regional organic waste are met.
Owner:SINOMA INT ENG
Method for calcining cement by carbide slag replacing whole limestone
The invention relates to a method of using carbide slag to replace all limestone for calcining cement, which belongs to the inorganic non-metallic material technological field. The invention uses the carbide slag as the calcareous raw material and adopts the dry process pre-decomposition cement production technology out of kiln. The invention is characterized in that the carbide slag is used to replace the limestone in 100 percent for calcining the cement clinker, and the invention includes: firstly, the preheating and the pre-decomposition of the carbide slag: a cyclone preheater and a calciner system are adopted for the preheating and the pre-decomposition of the carbide slag green stock; the decomposition temperature of the carbide is 380-550 DEG C, and the outlet temperature of the calciner is 550-750 DEG C; secondly, the coal powder burning and the green stock decomposition: the coal powder and the green stock enter the calciner respectively through a distributor; the adding position and the adding amount of wind, materials and coal of the calciner are controlled; the coal powder is burned at the condition of 850 DEG C above; the green stock is decomposed; thirdly, the materials enter a rotary kiln to be calcined into the cememt clinker. The invention has the advantages of resource saving performance, little CO2 emission, low cost, circular economy, etc.
Owner:TIANJIN CEMENT IND DESIGN & RES INST
Method and system for dry rotary kiln drying and incineration of urban domestic waste
ActiveCN103951293BThe process is simple and reliableFlexible processSolid waste disposalCement productionSlagEngineering
The invention provides a method and system for drying and incinerating urban household garbage through a dry-process rotary kiln. The method comprises the following steps: feeding wet garbage into a C5 blanking pipe, fast drying and alkalizing the garbage by utilizing high-temperature powder in the C5 blanking pipe, enabling the dry and easily-combustible garbage to enter in a kiln tail smoke chamber along with the powder, so as to be fast gasified and combusted, pumping high-temperature steam and combustion waste gas generated due to combustion through a bypass flue, mixing cold wind through a bypass fan so as to be mixed and regulate the temperature, and collecting dust through a dust collector, wherein the residual heat of dust-removed waste gas is used for power generation of a cement kiln waste heat power generation system, or productive drying, or can be discharged after dust is finely collected; calcining untimely burnout garbage and burnout slag into clinker in the rotary kiln along with raw materials; and enabling untimely burnout hydrocarbon compounds to ascend into a decomposing furnace for continuously burning. The invention further comprises the system for drying and incinerating urban household garbage through a dry-process rotary kiln. According to the method and system, the problems that the urban household garbage causes the influence on a kiln condition and the increase of coal consumption can be solved, and the sticking and plugging of a kiln system caused by the water in the garbage and chlor-alkali can be effectively eliminated.
Owner:长沙紫宸科技开发有限公司
Method for quenching pyrolysis products
ActiveCN111094518BLarge capacityImprove separation efficiencyThermal non-catalytic crackingTreatment with plural parallel cracking stages onlyThermodynamicsProcess engineering
The application provides a method for quenching pyrolysis products, more specifically, the method for quenching pyrolysis products includes: supplying the discharge stream from the liquid decomposition furnace to the first quenching tower; The upper effluent stream of is supplied to the second quench tower; the effluent stream from the first gas decomposition furnace is supplied to the second quench tower; and the effluent stream from the second gas decomposition furnace is supplied to the second quench tower.
Owner:LG CHEM LTD
Tertiary air duct coal powder preheating and prefiring method for cement predecomposition kiln
InactiveCN1256293CImprove adaptabilityRich combustion control meansThermodynamicsProcess engineering
The invention provides a method for preheating and pre-combusting pulverized coal in the tertiary air duct of a cement precalcining kiln. A decomposition furnace is set between the rotary kiln and the suspension preheater as the second heat source of the system. A certain proportion of pulverized coal is sprayed into the wall of the tertiary air duct at a certain distance, so that the pulverized coal and the tertiary hot air enter the calciner together. Generally, pulverized coal is sprayed 5-10m away from the tertiary air inlet of the calciner. The pulverized coal sprayed into the tertiary air duct from the wall of the tertiary air duct is divided into two to four symmetrical injections. The ratio of the pulverized coal entering the tertiary air pipe to the pulverized coal directly entering the calciner is 2:8-3:7. The gas-solid ratio of pulverized coal entering the tertiary air duct is subject to the tertiary air temperature of the calciner reaching 950°C-1000°C. Generally, the first branch pipe is led from the pulverized coal air pipe to the calciner to the third air pipe.
Owner:周立秋
Method for producing sintered material from inorganic raw materials
ActiveCN107207344BIncrease temperatureRotary drum furnacesPreheating chargesCombustionRotary furnace
The invention relates to a method for producing sintered material from organic raw materials (11), said method being carried out in a device comprising: cyclone preheater (1), rotary furnace (2), grate cooler (3), And wherein, the raw material (11) is preheated in the cyclone preheater (1), the preheated material is calcined and sintered in the rotary furnace (2), and the cooling air (4, 40) is blown in the grate cooler (3) Cooling the calcined material generates hot air. According to the invention, from upstream to downstream, the hot air is divided into three parts, according to the direction of progress of the material in the grate cooler, said three parts of hot air are at a decreasing temperature, respectively comprising at least The possible presence of a first air fraction (5) in the combustion zone of the precalciner used as combustion air, an intermediate second air fraction (6) larger than the required combustion air for energy generation and at a lower temperature The third air portion (7) is directed at least a portion (71) of the third air portion (7) towards said combustion zone of the device for use as combustion air together with said first air portion (5).
Owner:FIVES FCB
A zoned tissue combustion self-denitration system and process with a reduction furnace and a decomposition furnace
ActiveCN111750670BLow cost of environmental protectionAdaptableGas treatmentDispersed particle separationCombustionFlue gas
The invention discloses a self-denitrification system and process for zoned tissue combustion with a reduction furnace and a decomposition furnace. A reduction furnace is installed between the kiln tail smoke chamber and the decomposition furnace. The bottom of the calciner cone is connected to form a horizontally partitioned combustion environment with a central oxygen-rich zone and a peripheral low-oxygen zone on the calciner cross-section; The space inside the calciner below the upper branch pipe is the weak reduction zone, and the space inside the calciner above the upper branch pipe of the tertiary air is the burnout zone, forming a longitudinal gradient combustion environment combining strong reduction zone-weak reduction zone-burnout zone. The horizontal partition combustion environment is realized by the tertiary air entering vertically upward from the bottom center of the calciner, and the flue gas is realized by the spiral tangential rotating air entering from the side of the calciner; the vertical gradient combustion environment is realized by fuel graded feeding and tertiary air distribution. The present invention realizes self-denitrification through zoned organization combustion as a whole, and improves self-denitrification efficiency.
Owner:TIANJIN CEMENT IND DESIGN & RES INST
Method for preparing highly active light-burned magnesia in fixed-bed-fluidized-bed multi-fluid state
The invention relates to a method for preparing high-activity light-burned magnesia in a fixed bed-fluidized bed multi-fluid state, using magnesite with a particle size of 30-300 mm as raw material, and sending the magnesite to a fixed bed for calcining and decomposition through a feeding system The massive magnesite decomposes into smaller chunks and powders, and 10-80% of the magnesite undergoes a decomposition reaction, which is decomposed in an accumulation state; the material particles from the fixed bed calcining and decomposition furnace are passed through The pipeline is sent to the fluidized bed boiling state decomposition furnace, so that the material particles are in a boiling state, and the undecomposed magnesite can continue to decompose in the process of simmering in the fluidized bed boiling state decomposition furnace. This decomposition reaction is boiling state decomposition; completely The decomposed light-burned magnesia enters the cooling device through the pipeline along with the hot flue gas and is collected from the discharge port after being cooled. The material presents a multi-fluid combination in the whole process. This multi-fluid combination is conducive to the full progress of the decomposition reaction of magnesite, which can ensure that the decomposition rate of magnesite is greater than 99%, and the product quality is uniform and stable.
Owner:UNIV OF SCI & TECH LIAONING
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