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29 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.
Arsenic-calcium slag harmless treatment equipment
The utility model provides harmless treatment equipment for arsenic-calcium slag. The harmless treatment equipment comprises a mixer, a medium-temperature volatilization furnace, a high-temperature decomposition furnace and a tail gas purification device, the mixer is provided with a mixed material inlet and a mixed material outlet, and the mixed material inlet is used for inputting arsenic-calcium slag and pyrite. The medium-temperature volatilization furnace is provided with a volatilization furnace material inlet, a volatilization furnace gas inlet, a volatilization furnace gas outlet and a volatilization furnace tailing outlet. And the volatilization furnace material inlet is connected with the mixed material outlet. The high-temperature decomposing furnace is provided with a decomposing furnace material inlet, a decomposing furnace gas inlet, a decomposing furnace gas outlet and a decomposing furnace tailing outlet. The material inlet of the decomposing furnace is connected with the tailing outlet of the volatilization furnace. The tail gas purification device is provided with a purification inlet and a purification outlet, and the purification inlet is connected with the volatilization furnace gas outlet and the decomposition furnace gas outlet. The harmless treatment equipment for the arsenic-calcium slag can effectively remove arsenic in the arsenic-calcium slag, avoid arsenic pollution, improve the utilization rate of pyrite and save cost and heat.
Owner:SHENZHEN ZHONGYUAN RARE GOLD MATERIALS TECH CO LTD
Decomposition furnace outlet temperature optimizing method, system, equipment and medium
The invention provides a decomposing furnace outlet temperature optimizing method, system and device and a medium. The method comprises the steps that firstly, multi-source data of decomposing furnace operation are collected and preprocessed, features are extracted through an auto-encoder, and key features are screened out through a random forest to construct subsets; and then, constructing a mixed prediction model of LSTM and SVR, carrying out training by taking the feature subset as input and the outlet temperature as output, and adjusting parameters through a back propagation algorithm. And then determining an optimal combination of the coal feeding amount, the air amount and the raw material feeding amount by combining a genetic algorithm with the goal that the outlet temperature reaches a target value and the energy consumption is minimum. The optimization result is used for actual control, the temperature is monitored in real time, and if the deviation exceeds a threshold value, data are collected again for optimization. According to the method, the accuracy and the stability of outlet temperature control of the decomposing furnace are effectively improved, the energy consumption is remarkably reduced, the cross-working-condition adaptability is enhanced, the real-time performance and the efficiency of optimization are improved, and good economic benefits and quality guarantee are brought to industrial production.
Owner:CHINA NAT BUILDING MATERIALS TECH CO LTD +2
Low-nitrogen combustion decomposing furnace and lime calcining system
The invention provides a low-nitrogen combustion decomposing furnace and a lime calcining system, and belongs to the technical field of limestone calcining, specifically, the low-nitrogen combustion decomposing furnace comprises a decomposing furnace body used for calcining and decomposing limestone, and a furnace chamber of the decomposing furnace body is divided into a material collecting area, a hot carbon reduction area and a combustion decomposing area; materials, combustion-supporting gas and fuel enter the decomposing furnace body in two ways, and the proportion of the materials, the combustion-supporting gas and the fuel entering the decomposing furnace body in the two ways is controlled, so that a hot carbon reduction area and a combustion decomposing area are formed in a furnace cavity of the decomposing furnace body. For example, the proportion of combustion-supporting gas in the combustion decomposition area is more, so that materials can be fully combusted, while the proportion of the combustion-supporting gas in the hot carbon reduction area can be reduced, so that insufficient combustion is carried out in the area, and meanwhile, suppression and reduction are carried out through fuel, so that nitrogen oxide passing through the area is subjected to reduction reaction to become carbon dioxide and nitrogen to be discharged; the content of nitrogen oxide is greatly reduced, and the nitrogen oxide treatment procedure of the subsequent exhaust process is reduced.
Owner:TIANJIN CHAOYANG ENVIRONMENTAL PROTECTION TECH GRP CO LTD
Dry-process cement clinker sintering device
The utility model provides a dry process cement clinker firing device which comprises a preheating mechanism, a decomposing furnace, a material spraying assembly, a rotary kiln and a cooling machine, the preheating mechanism is used for preheating raw materials, the decomposing furnace is connected with the preheating mechanism, the decomposing furnace is used for receiving and decomposing the preheated raw materials, the material spraying assembly is connected with the decomposing furnace, and the rotary kiln is connected with the cooling machine. The material spraying assembly is used for evenly spraying preheated raw materials into the rotary kiln, the rotary kiln is used for calcining the raw materials to form clinker, the rotary kiln sequentially comprises a shell, at least two heat insulation layers and a heat-resistant lining from outside to inside, and the cooling machine is used for cooling the clinker. Due to the fact that the material spraying assembly evenly sprays the preheated raw materials into the rotary kiln, the raw materials can be heated more sufficiently and evenly in the rotary kiln, the calcining process is more thorough, and the clinker quality is further guaranteed. In addition, due to the fact that the rotary kiln comprises at least two heat insulation layers, the heat insulation effect of the rotary kiln is better, and the calcination process is more thorough.
Owner:WEIHUI CHUNJIANG CEMENTS CO LTD
A device and method for producing low-sulfur and low-chlorine lime powder by calcining limestone powder
The application discloses a device and a production method for producing low-sulfur and low-chlorine lime powder by calcining limestone powder, and belongs to the field of limestone powder production and steelmaking. The decomposition furnace is divided into a high-temperature oxygen-deficient combustion region, a first limestone decomposition region and a second limestone decomposition region. A high-temperature oxygen-deficient CaO-free environment is created in the high-temperature oxygen-deficient combustion region, so as to promote the volatilization of residual KCl and NaCl, and then the residual KCl and NaCl are discharged through bypass air release technology. Limestone is added in the first decomposition region for decomposition, and combustion-supporting air is added in the second limestone decomposition region for strengthening combustion effect. In this way, the decomposition rate of limestone can be improved, the quality of steelmaking lime can be improved, and the steelmaking cost can be reduced.
Owner:天津中材工程研究中心有限公司 +1
System for calcining cement clinker by using ammonia-coal mixed fuel
The utility model relates to the technical field of cement production, and provides an ammonia-coal mixed fuel cement clinker calcining system which comprises a rotary kiln, a smoke chamber and a decomposing furnace which are sequentially connected. A sufficient combustion area and an ammonia gas pre-decomposition-NOx reduction area are formed in the decomposition furnace, and the sufficient combustion area is located at the downstream of the ammonia gas pre-decomposition-NOx reduction area; the rotary kiln and the ammonia gas predecomposition-NOx reduction area are both connected with an ammonia-coal mixture feeding module used for introducing ammonia gas, pulverized coal and a primary air mixture, the rotary kiln is provided with a secondary air inlet, and the sufficient combustion area is provided with a pulverized coal inlet and a tertiary air inlet. According to the system for calcining the cement clinker by using the ammonia-coal mixed fuel, the ammonia and the coal powder are mixed for use, so that the use of fossil fuel can be reduced, the emission of greenhouse gas CO2 in the calcining process of the cement clinker is reduced, the cost is lower, and meanwhile, the problem that a large amount of NOx is generated by combustion of the ammonia gas is solved.
Owner:BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
Concrete admixture based on washed sand sludge and preparation method thereof
The invention discloses a concrete admixture based on washed sand sludge and a preparation method thereof, comprising the following steps: 1) drying and crushing the sludge to obtain sludge powder; 2) drying and grinding coal gangue, and then feeding it into a decomposition furnace as fuel; 3) feeding the sludge powder obtained in step 1) into a preheater for preheating, and then feeding it into a decomposition furnace after preheating; 4) feeding the material decomposed in the decomposition furnace into a rotary kiln for calcining into clinker, and cooling it in a grate cooler to obtain clinker; 5) roller pressing and ball milling the clinker to obtain a finished product. The admixture prepared by using washed sand sludge as raw material has good performance, a fluidity ratio of 105%, a water content of 0.34%, a loss on ignition of 1.34%, and a 28d activity index of 88%.
Owner:河南方瑞科技发展有限公司
High-activity lime low-nitrogen energy-saving calcining system based on thermal carbon reduction technology
The invention provides a low-nitrogen energy-saving calcining system for high-activity lime based on a thermal carbon reduction technology, which belongs to the technical field of lime production and specifically comprises a multi-stage suspension preheating unit, a suspension low-nitrogen combustion unit and a fluidized bed suspension cooling unit, the fluidized bed suspension cooling unit comprises a fluidized bed suspension cooling furnace and two cooling cyclones which are arranged in parallel, and the fluidized bed suspension cooling furnace is used for receiving and cooling materials which are combusted by the decomposing furnace and then subjected to gas-solid separation by the cyclones; the two parallel-connected cooling cyclone cylinders are used for carrying out gas-solid separation on the materials cooled by the fluidized bed suspension cooling furnace so as to be stored or transported to a finished product warehouse, the two parallel-connected cyclone cylinders are arranged in the cooling unit, single-stage gas-solid separation is carried out, the cooled materials can be separated only by one of the cooling cyclone cylinders, and the separation efficiency is greatly improved. The running resistance of the system is greatly reduced, the power consumption is reduced, and the cost is further reduced.
Owner:TIANJIN CHAOYANG ENVIRONMENTAL PROTECTION TECH GRP CO LTD +1
A dicalcium silicate-calcium sulfoaluminate-calcium sulfo-silicate cement clinker and an industrialized preparation method thereof
The application discloses a kind of dicalcium silicate-calcium sulphoaluminate-calcium sulphosilicate cement clinker and its industrialized preparation method, it is related to building material technical field, method includes steps: S1, raw material preparation, calcareous, siliceous and sulphuric raw materials are proportioned according to proportion, raw material rate value is limestone saturation coefficient 0.9~1.0, aluminium sulphur ratio ≤2.2, aluminium silicon ratio ≤1.0;S2, preheating decomposition, raw meal is handled by multistage cyclone preheater and decomposition furnace, the temperature of first-stage cyclone preheater outlet ≤310 ℃, the middle part temperature of decomposition furnace 770±10 ℃;S3, calcination, material enters rotary kiln, sintering zone temperature 1200~1250 ℃, weak oxidation or neutral atmosphere in kiln;S4, quenching, kiln clinker is cooled by grate cooler, 15~25min is cooled to 100 ℃ below from 1200~1250 ℃;S5, crushing storage, after cooling clinker is crushed and is stored, finished product is obtained, solve the problem that existing dicalcium silicate-calcium sulphoaluminate-calcium sulphosilicate cement clinker is easily decomposed at high temperature, sintering temperature zone is narrow, industrialized mineral composition fluctuation is big and kiln system is easily crust blocking.
Owner:JIAHUA SPECIAL CEMENT
A method for dividing and identifying temperature working conditions of a decomposition furnace under waste co-processing
The application discloses a kind of decomposition furnace temperature working condition division and identification method under garbage collaborative disposal, its steps include:1) using WK-Means algorithm to carry out decomposition furnace temperature working condition division;2) using IPSO-SVM algorithm to carry out decomposition furnace temperature working condition identification.The application is aimed at the key parameter in the process of decomposition furnace temperature control under garbage collaborative disposal to carry out working condition division and identification, so as to improve the efficiency and accuracy of decomposition furnace temperature multi-working condition division and identification under garbage collaborative disposal.
Owner:HEFEI UNIV OF TECH
Multi-objective optimized cement decomposing furnace intelligent prediction control method, device and equipment
PendingCN121596740AAdaptive controlSimultaneous control of multiple variablesFurnace temperatureGenetics algorithms
The invention provides a multi-objective optimization cement decomposing furnace intelligent prediction control method, device and equipment, and relates to the technical field of cement decomposing furnace control. The method comprises the following steps: respectively obtaining an f-CaO prediction value, an NOx prediction value and a decomposition furnace temperature prediction value at the next moment through an f-CaO prediction model, an NOx prediction model and a decomposition furnace temperature prediction model. Wherein the f-CaO prediction model, the NOx prediction model and the decomposition furnace temperature prediction model are respectively constructed on the basis of a CNN-P-sLSTM network, a CNN-minGRU network and a Reformer-KAN network, and are obtained through training of the CNN-P-sLSTM network, the CNN-minGRU network and the Reformer-KAN network. And on the basis of the f-CaO predicted value and the NOx predicted value at the next moment, the optimal solution interval of the state parameters is calculated through a multi-objective genetic algorithm NSGA-II. And performing intelligent control on the cement decomposing furnace based on the optimal solution interval of the state parameters and the temperature predicted value of the decomposing furnace at the next moment. The production cost and pollution emission can be reduced, and the quality of a cement finished product and the resource utilization rate are improved.
Owner:YANSHAN UNIV
Novel self-denitration carbide slag cement kiln production line
The utility model relates to the technical field of cement kiln denitration, and discloses a novel self-denitration carbide slag cement kiln production line which comprises a rotary kiln, a smoke chamber, a decomposing furnace, a C1 preheater, a C2 preheater, a C3 preheater, a raw material conveying system, a carbide slag conveying system, a drying crusher and a cyclone dust collector. An exhaust pipe of the C3 preheater is connected with a discharge pipe of the C1 preheater, an exhaust pipe of the C2 preheater is communicated with an inlet end of the drying crusher, the carbide slag conveying system is communicated with the exhaust pipe of the C2 preheater, an outlet end of the drying crusher is communicated with the cyclone dust collector, an exhaust pipe of the cyclone dust collector is communicated with a discharge pipe of the raw material conveying system, and the raw material conveying system is communicated with a discharge pipe of the cyclone dust collector. And an exhaust pipe of the preheater C1 is connected with a high-temperature fan. According to the utility model, the temperature of the inlet entering the drying crusher is increased, so that the initial reaction temperature of ammonia and nitrogen oxide in carbide slag is increased, and the automatic denitration effect of a production line system is realized.
Owner:SICHUAN ZHONGKEJUN ENERGY CONSERVATION & ENVIRONMENTAL PROTECTION TECH CO LTD
Low NOx-based X Method for controlling a decomposition furnace for full system oxycombustion, method and system for preparing cement clinker
Owner:TIANJIN CEMENT IND DESIGN & RES INST CO LTD
Semi-dry desulfurization ash recycling on-line treatment system and semi-dry desulfurization ash recycling on-line treatment method
The invention discloses an online recycling treatment system and method for semi-dry desulfurization ash. The system at least comprises a decomposing furnace system (1), a high-temperature dust collecting system (2) and a hot material cooling system (3), wherein the decomposing furnace system (1) is used for carrying out high-temperature decomposition on desulfurized fly ash of the semi-dry desulfurization system to generate calcium oxide and sulfur dioxide enriched gas, and then sending the calcium oxide and sulfur dioxide enriched gas to the high-temperature dust collecting system (2) for separation; and the high-temperature dust collection system (2) cools the separated and collected calcium oxide through the hot material cooling system (3) and outputs the cooled calcium oxide. According to the method, the sulfur dioxide enriched gas with high added value is generated through on-line high-temperature decomposition of the semi-dry desulfurization ash, meanwhile, calcium oxide generated through decomposition serves as a desulfurizing agent to be recycled, the problem of solid waste desulfurization ash disposal of a traditional semi-dry desulfurization system is solved, and secondary pollution is avoided.
Owner:HUATIAN NANJING ENG & TECH CORP MCC +1
Method for recycling solid wastes used in cement production
The invention discloses a solid waste recycling material recycling method for cement production, which belongs to the technical field of cement production, and comprises the following steps of: dividing solid wastes into alternative raw materials, alternative fuels and mixed materials according to components, and respectively crushing, sorting and homogenizing; mixing the substitute raw material type solid wastes with natural raw materials according to a preset ratio, and adjusting the silicon rate, the aluminum rate and the saturation coefficient of lime to form a cement raw material; the alternative fuel type solid waste is dried, crushed and then conveyed to a rotary kiln or a decomposing furnace, and part of fossil fuel is replaced for high-temperature calcination; in the cement grinding stage, the mixed material type solid waste is mixed into clinker according to the mass percent of 5%-40%, and the mixed material type solid waste and the clinker are jointly ground into a cement finished product; organic matters in the solid waste are decomposed through a high-temperature and alkaline environment in the kiln, heavy metals are solidified, and emission indexes are monitored in real time; according to the invention, through solid waste classification treatment and multi-link cooperative utilization, recycling and disposal of various types of solid wastes are realized.
Owner:英德海螺水泥有限责任公司
System for producing lime from carbide slag
The utility model belongs to the technical field of industrial waste residue recycling, and particularly discloses a system for producing lime from carbide slag. The system is composed of a carbide slag warehouse, metering equipment, conveying equipment A, conveying equipment B, conveying equipment C, conveying equipment D, a homogenization metering system, a cyclone preheating system, a cyclone calcination decomposition system, a suspension cooling system, a lime warehouse, a homogenization metering system, granulation equipment, a calcium carbide production line and the like. The device disclosed by the utility model has the beneficial effects that the process flow is simple, the layout is compact, the suspension preheating decomposition calcining technology of cyclone preheating, pipeline type decomposition furnace and suspension cooling is adopted, continuous production can be realized, the production efficiency is high, the decomposition rate of carbide slag is greater than 98%, and the yield is high; according to the utility model, the calcium carbide slag suspension calcination technology is adopted, the unit product energy consumption of lime can be reduced, so that the unit energy consumption of calcium carbide finished products is reduced, the calcium carbide by-product furnace gas is adopted as the calcination fuel, the reasonable and full utilization of coal resources can be realized, and no extra coal resource consumption is caused.
Owner:NANJING GOLDEN CEMENT TECH ENG CO LTD
Clay calcination treatment system
PCT designated stageWO2025195528A1Charge treatment typeFurnace typesEmission standardAtmospheric pollution
The present disclosure relates to a clay calcination treatment system, comprising a raw material mill, a dust collector connected to an outlet of the raw material mill, a calcination preheating system and a flue gas exhaust system which are connected to an outlet of the dust collector, a cooling system connected to an outlet of the calcination preheating system, and an exhaust gas harmless treatment system used for treating an inert gas, wherein the calcination preheating system comprises a preheating cyclone, a decomposition furnace, a first hot blast stove used for providing a heat source for the decomposition furnace, and a second fan; the cooling system comprises a cooling cyclone; and the exhaust gas harmless treatment system comprises a third fan and a second hot blast stove. An inert exhaust gas generated in the decomposition furnace passes through the preheating cyclone and then enters the second hot blast stove, and an outlet of the second hot blast stove is connected to the raw material mill. CO, volatile matter and sulfide in the inert exhaust gas are digested and absorbed inside the system, thereby reducing air pollution; a reducing atmosphere is maintained during a calcining process, such that the color of a finished product is ensured; and the clay calcination treatment system can perfectly adapt to a high-humidity clay calcining process, and can significantly reduce the treatment investment cost of the inert exhaust gas, and the inert exhaust gas can also meet gaseous emission standards.
Owner:CBMI CONSTRUCTION CO LTD
A method of controlling the color of high iron content calcined clay
The present application belongs to the technical field of inorganic non-metallic material, and particularly relates to a method for controlling the color of calcined clay with high iron content. The method comprises a clay raw material suspension preheating system (1), a clay raw material suspension calcination section system (2) and a calcined clay suspension cooling system (3). The clay raw material suspension preheating system (1) is connected with the clay raw material suspension calcination section system (2), and the clay raw material suspension calcination section system (2) is connected with the calcined clay suspension cooling system (3). The present application does not need to control the atmosphere in the calcination and cooling stages, and the process flow is simple. In the cooling stage, the heat of the high-temperature calcined clay can be efficiently recovered through the ambient air, and the recovered high-temperature air can be used as combustion-supporting air for fuel combustion in the decomposition furnace, so that the heat consumption is greatly reduced. When the iron content of the clay is higher than 5%, the color of the calcined clay can also be kept gray, and the magnetite with high added value can be obtained.
Owner:CHENGDU DESIGN & RES INST OF BLDG MAT IND CO LTD
Cement calcination harmless process based on waste cathode carbon block alternative fuel
The invention discloses a cement calcination harmless process based on waste cathode carbon block alternative fuel, which comprises the following steps: after electrolytic aluminum waste cathode carbon blocks are subjected to magnetic separation to remove iron and are ground into 80 mu m sieve residue less than or equal to 12 percent, pre-mixing with pretreated Bayer process red mud (Al2O3 is more than or equal to 18 percent by weight and Na2O is less than or equal to 6 percent by weight) according to a mass ratio of 100: (3-8) to form composite fuel; the fuel is sprayed into a decomposing furnace through a multi-channel combustor, and stays at 860-900 DEG C for more than or equal to 5 seconds to replace 15-35% of fire coal; after combustion, the raw material stays for 25-40 minutes in a high-temperature zone of 1420-1450 DEG C of the rotary kiln, so that fluorine ions react with Al2O3 in the red mud to generate a Na3AlF6 mineral phase; the kiln tail flue gas is suddenly cooled to below 180 DEG C within 0.8 second through a quench tower to inhibit dioxin, and then carbide slag (Ca / F molar ratio is 1.5-2.2) is sprayed to remove residual fluorine; and returning the defluorinated dust to the raw mill for cyclic utilization. According to the technology, the fluorine curing rate is larger than or equal to 95%, the dioxin emission is smaller than or equal to 0.025 ng-TEQ / Nm < 3 >, the clinker coal consumption per ton is smaller than or equal to 95 kgce, and the problems of pollution control and energy efficiency optimization in the waste cathode carbon block fuelization process are solved.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
High-activity lime calcining process based on thermal carbon reduction technology
The invention provides a high-activity lime calcining process based on a thermal carbon reduction technology, and belongs to the technical field of lime production, and the high-activity lime calcining process specifically comprises the following steps: enabling the interior from a multi-stage suspension preheating unit to a suspension low-nitrogen combustion unit to be in a negative pressure state through a high-temperature fan; introducing the material into a multi-stage suspension preheating unit, and carrying out suspension preheating by utilizing preheating gas; fuel and preheated combustion-supporting gas are introduced into the decomposing furnace, and materials are subjected to suspension calcination decomposition in the decomposing furnace; the separated hot gas enters a multi-stage suspension preheating unit under the action of negative pressure to serve as preheating gas, and the separated material is introduced into a fluidized bed suspension cooling unit; and the materials and the gas after heat exchange are introduced into a cooling cyclone cylinder for cyclone separation, and the separated gas is introduced into the decomposing furnace to serve as preheated combustion-supporting gas. The cooling part is cooled through the suspension cooling furnace, and gas-solid separation is performed through the cooling cyclone, so that the running resistance of the system is greatly reduced, the power consumption is reduced, and the cost is further reduced.
Owner:TIANJIN CHAOYANG ENVIRONMENTAL PROTECTION TECH GRP CO LTD
Energy-saving operation method of preheating and pre-decomposing system for cement production
The invention relates to the technical field of preheating and predecomposition in cement production, and discloses an energy-saving operation method of a preheating and predecomposition system for cement production. Energy saving is achieved through cooperative control of raw material components and the temperature of the preheater. According to the raw material component control, 2.02.5% by mass of specific coal gangue is added into the raw material, the initial decomposition temperature of calcium carbonate is reduced by utilizing the chemical characteristics of the specific coal gangue, and advanced decomposition of the raw material in a C1C4-level preheater is promoted. According to the preheater temperature control, the outlet temperatures of C1C4-grade preheaters are actively increased to about 340 DEG C, 520 DEG C, 640 DEG C and 800 DEG C respectively, so that the total decomposition rate of raw materials before the raw materials enter a C5-grade preheater is greatly increased. On the basis, the C5 outlet temperature can be reduced to about 840 DEG C on the premise that the kiln-entering decomposition rate is not changed, and the energy input of the decomposing furnace is reduced. The system heat distribution is effectively optimized, the problem of high energy consumption caused by excessive dependence on a decomposing furnace in the prior art is solved, and the fuel consumption of a unit product is remarkably reduced.
Owner:NINGXIA QINGTONGXIA CEMENT CO LTD
Process method for producing calcium carbide
The invention relates to a process method for producing calcium carbide, which comprises the following steps of: powdering limestone blocks, calcining by a preheater and a decomposing furnace to obtain high-quality high-temperature lime powder, metering by a metering device, conveying the high-quality high-temperature lime powder and metered semi-coke powder blocks to a mixing stirrer, uniformly stirring to obtain high-temperature materials, continuously conveying the high-temperature materials to a ball press machine, and carrying out ball press molding on the high-temperature materials. According to the invention, the result is incomparable to that of the traditional equipment and the production process, and the method has the advantages of little dust, high utilization rate of heat energy and electric energy, and high productivity.
Owner:米长山
Air ratio dividing device for fluidized bed of decomposing furnace
The utility model relates to the technical field of flue gas desulfurization equipment, in particular to an air ratio dividing device for a fluidized bed of a decomposing furnace, which comprises a base, a hollow first shell is mounted at the bottom end of the outer wall of the rotating shaft and communicates with the rotating shaft, and a plurality of first fan blades are fixed to the top of the first shell; the rotating shaft rotates to drive the first shell and the second shell to rotate, the first shell drives the multiple first fan blades to rotate, the first fan blades rotate to generate spiral ascending air flow, sulfide and lime spirally ascend under the action of the ascending air flow, and the sulfide and the lime are pushed to be fully suspended; under the action of airflow generated by rotation of a plurality of second fan blades, sulfide and lime are fully suspended and mixed, through the design, the high-speed airflow is fed into the decomposing furnace, full suspension and mixing between the sulfide and the lime are facilitated, the contact efficiency of the sulfide and the lime is improved, and therefore the desulfurization effect is improved.
Owner:NEIXIANG COUNTY BAOTIANMAN CEMENTS CO LTD
Retired wind power blade cement clinker, and preparation method and application thereof
The application provides a retired wind power blade cement clinker, a preparation method and application thereof. The method comprises the following steps: crushing solid waste raw materials; the solid waste raw materials comprise retired wind power blades, carbide slag, red mud and iron tailings; the proportioning of the solid waste raw materials is determined according to a preset rate value; the solid waste raw materials are measured according to the proportioning; the carbide slag, the red mud and the iron tailings are uniformly mixed to obtain a mixture; the mixture is ground into raw materials; the raw materials are homogenized and preheated; the preheated raw materials enter a decomposing furnace for decomposition, and coal powder and retired wind power blade powder are sprayed into the decomposing furnace; calcination is performed to obtain the cement clinker. The technical problem solved is how to prepare a cement clinker, so that the retired wind power blades and other solid waste raw materials can be effectively utilized, carbon emission is reduced, the land occupation pollution problem of the retired wind power blades is solved, the additional heat source can be provided in the adding process, the use amount of coal resources is saved, obvious energy saving and environmental protection benefits are achieved, and the production cost of a cement enterprise is reduced.
Owner:CHINA BUILDING MATERIALS ACADEMY CO LTD
Calcium carbonate cyclic decomposition and CO2 capture system
The utility model discloses a calcium carbonate cyclic decomposition and CO2 capture system, which relates to the technical field of CO2 capture and comprises a decomposition furnace, a preheater component, a tertiary air pipe and a rotary kiln. The preheater assembly comprises four preheaters which are sequentially connected, namely C1, C2, C3 and C4, and the discharging end of the preheater C4 is connected with the feeding end of the decomposing furnace; the feeding end of the decomposing furnace extends downwards and is connected with an ultra-high-temperature circulating fan, and the kiln tail of the rotary kiln and a tertiary air pipe are both communicated with an air inlet pipe of the preheater C4. The outlet end of the decomposing furnace is connected with a preheater C5, the discharging end of the preheater C5 is communicated with the rotary kiln, an air outlet pipeline of the preheater C5 is divided into two paths, one path is connected with an ultrahigh-temperature circulating fan, and the other path is connected with a CO2 aftertreatment system. According to the utility model, the kiln tail decomposing furnace and the preheater of the existing cement production line are properly modified, so that the system can normally produce cement clinker and simultaneously co-produce high-concentration CO2, the high-concentration CO2 is captured, and the emission reduction of CO2 on the cement production line is realized.
Owner:CHENGDU JINCHANGMIN ENVIRONMENTAL PROTECTION TECH CO LTD
Process for producing zinc calcine based on cement clinker production line transformation
The invention provides a technology for producing zinc calcine based on cement clinker production line transformation. The technology comprises the following operation steps that S1, zinc-containing solid waste, waste tire residues, furfural residues and other waste biomass residues are subjected to batching and stirring; the invention provides a technology for producing zinc calcine based on modification of a cement clinker production line, which comprises the following steps: using zinc-containing solid wastes, waste tire residues, furfural residues and other waste biomass residues, simultaneously increasing raw material balling to increase the permeability of materials in a kiln, arranging a carbonization device in a decomposition furnace to increase the heat value and improve the yield, recovering zinc steam by using zinc hypoxide, and spraying ammonia water to obtain the zinc calcine. Compared with the traditional rotary kiln for producing zinc oxide, the method has the advantages that the fuel cost is reduced by more than 50%, the roasted product utilizes the flue gas with the same property as waste heat, and the roasted product does not use fuel gas or diesel oil, so that the energy cost is saved, and the production cost is reduced. And particularly, zinc in the tire slag can be recycled.
Owner:李道斌
System and method for preparing sulfuric acid and co-producing cement clinker from ardealite
The invention discloses a system and a method for preparing sulfuric acid and co-producing cement clinker from ardealite. The system comprises a preheater, a decomposing furnace, a rotary kiln and a grate cooler, the preheater comprises a kiln row and a furnace row which are used for material heat exchange, each of the kiln row and the furnace row comprises multiple stages of cyclones, the penultimate stage of cyclone in the kiln row is communicated with a smoke chamber uptake flue, and the last stage of cyclone is communicated with the decomposing furnace; the penultimate-stage cyclone cylinder in the furnace row is communicated with the decomposing furnace, the last-stage cyclone cylinder is communicated with the smoke chamber, materials are collected and enter the rotary kiln through the smoke chamber, and waste gas discharged by the furnace row is conveyed to the SO2 sulfuric acid preparation process through a furnace row high-temperature fan; the decomposing furnace is connected with a plurality of combustors; the decomposing furnace and the rotary kiln are both connected with the grate cooler, the grate cooler cools clinker and discharges the clinker out of the system, generated secondary air is introduced into the rotary kiln, and generated tertiary air is introduced into the decomposing furnace. The coal consumption indexes of multiple stages can be reduced, the SO2 concentration of exhaust gas discharged by the preheater is improved, and the power consumption index for preparing sulfuric acid through flue gas treatment SO2 is reduced.
Owner:ANHUI CONCH DESIGN & RES INST OF BUILDING MATERIALS CO LTD
A two-stage calcination and carbon dioxide recovery system and process for magnesite
ActiveCN121782850BReduce temperature loadSolve lossCarbon compoundsRotary drum furnacesCombustion chamberDust control
The application discloses a magnesite two-stage calcination and carbon dioxide recovery system and process, relates to the technical field of efficient utilization of magnesite, and aims to solve the problem of how to realize efficient and low-consumption calcination of high-quality magnesia and efficient recovery of carbon dioxide in a same process system. A rotary kiln is arranged in a rotary kiln combustion chamber, and the combustion chamber is used for heating the outer wall of the rotary kiln by gaseous fuel; the outlet end of the rotary kiln is communicated with a gas-solid separation chamber; magnesite powder is decomposed in the rotary kiln to generate carbon dioxide gas, which is led out by an induced draft fan through the gas-solid separation chamber, and micro-negative pressure in the kiln is maintained. High-temperature dust-containing carbon dioxide enters a downstream A1 carbon dioxide cyclone gas-solid separator for gas-solid separation. After heat exchange, cooling and dust removal, the high-temperature gas is transported to a carbon dioxide liquefaction and solidification treatment system; the solid material outlet of the gas-solid separation chamber is connected to the feeding port of a suspension decomposition furnace through a high-temperature airtight conveying device, and a decomposition furnace main combustion chamber is arranged at the bottom of the suspension decomposition furnace.
Owner:YINGKOU JINHONGYUAN MEI LU CERAMICS CO LTD
Process method for preparing lime and co-producing sulfur by using all-solid waste gypsum of cement kiln
PendingCN121405380ACalcium/strontium/barium carbonatesRotary drum furnacesClinker (waste)Process engineering
The invention provides a process method for preparing lime and co-producing sulfur by using cement kiln all-solid waste gypsum, and relates to the technical field of solid waste treatment and carbon dioxide capture and mineralization utilization. According to the method, a novel dry cement clinker kiln production system is subjected to nine targeted modifications (including independent operation modification of a decomposing furnace air pipe, additional arrangement of a material distributing and batching device, optimization of a rotary kiln lining, building of a waste heat recovery and tail gas utilization system, additional arrangement of an oxygen enrichment device, additional arrangement of a CO2 trapping system and the like); calcium oxide (the purity is greater than or equal to 97%), calcium carbonate (the purity is greater than or equal to 98%) and sulfur (the purity is greater than or equal to 99%) are synchronously prepared under the condition of 1300 + / -10 DEG C to 1350 + / -10 DEG C through the steps of pretreatment, precise feeding, calcination reaction and the like. According to the method, full-amount resource utilization of the solid waste gypsum is achieved through existing cement kiln equipment, the investment and operation cost is reduced, the comprehensive energy consumption is reduced by 30% or above compared with a traditional process, the sulfur market gap is made up, and the cement kiln utilization rate is increased.
Owner:CARBON SILVER (HEBEI XIONGAN) NEW ENERGY TECHNOLOGY CO LTD