676 results about "Cement kiln" patented technology

The invention relates to the technical field of machine learning, and discloses a cement kiln alternative fuel consumption prediction method and system based on machine learning. The method comprises the following steps: processing alternative fuel characteristic parameters in a cement kiln system and kiln system operation parameters to obtain a cement kiln multi-source data set; performing thermal analysis test on the alternative fuel sample to obtain an alternative fuel combustion characteristic parameter set; analyzing the dynamic association relationship between the kiln system working condition and the alternative fuel characteristics to obtain a working condition adaptability parameter set; extracting a combustion time-space feature set consumed by the alternative fuel of the cement kiln; performing multi-model parallel processing and prediction result fusion on the combustion space-time feature set to obtain first prediction data; and executing adaptive error correction, and outputting second prediction data and a fuel adjustment suggestion. According to the method, the complex non-linear relation and the time-lag effect between the kiln system working condition and the alternative fuel characteristics are effectively captured, and accurate prediction and optimal control over the alternative fuel consumption are achieved.

The invention discloses a method and system for predicting the temperature of a rotary cement kiln, and belongs to the technical field of artificial intelligence. The method for predicting the temperature of the rotary cement kiln comprises the steps that real working condition data and simulation working condition data of the rotary cement kiln are obtained; the real working condition data and the simulation working condition data are mixed, and a sample data set is constructed; constructing a temperature prediction model of the rotary cement kiln; training the temperature prediction model of the rotary cement kiln by using the sample data set; and realizing the temperature prediction of the rotary cement kiln by using the trained rotary cement kiln temperature prediction model. According to the method for predicting the temperature of the rotary cement kiln, the multi-source sensing data and the depth time sequence modeling technology are fused, the temperature prediction of the burning zone of the rotary cement kiln is achieved through the CNN-LSTM mixed neural network, and a decision basis can be provided for regulation and control of the working condition of the rotary cement kiln.

The invention discloses a cement kiln tail flue gas waste heat recovery system based on cascade heat exchange and intelligent regulation and control and a cascade heat exchange method thereof, the cement kiln tail flue gas waste heat recovery system comprises a cascade heat exchange module and an intelligent regulation and control module which are matched for use, and a flue gas guide plate is arranged at a flue gas inlet of the cascade heat exchange module; under control and regulation of the intelligent regulation and control module, high, medium and low cascade heat exchange of cement kiln tail flue gas waste heat is achieved, the dynamic response time of control and regulation can be shorter than 30 s, the response speed is increased by 60% or above compared with a traditional control system with a fixed proportion, the scaling and anti-corrosion detection function is achieved, and the control system is suitable for large-scale popularization and application. And the operation stability of the system is guaranteed, the service life of the system is prolonged, and the system is not only suitable for heat energy recovery in the cement production process, but also capable of achieving efficient heat energy recovery in other high-dust and high-corrosion flue gas environments.

The invention provides a cement kiln bypass ventilation and high-chlorine material treatment device, and relates to the technical field of bypass ventilation devices.The spraying mechanism comprises a fixed rotating shaft, the fixed rotating shaft is fixedly installed through a fixed output shaft and a servo motor, and a first bevel gear is arranged on the fixed rotating shaft; a first bevel gear is rotatably mounted on the annular steel tank body, a second bevel gear is engaged with the circumferential surface of the first bevel gear, a third bevel gear is engaged with the circumferential surface of the second bevel gear, a first fixing shaft is rotatably mounted on the second bevel gear, and the first fixing shaft is fixedly mounted on the annular steel tank body. A spiral blade centrifugal separation unit and a rotational flow plate demister fine treatment unit are innovatively integrated in the device, a spiral blade adopts a variable pitch design and is driven by a servo motor, the rotating speed can be adjusted according to the working condition of flue gas, airflow is driven to form a strong rotational flow field, and high-chlorine dust with large particle size in the flue gas rapidly moves towards a tank wall under the action of centrifugal force.

The invention relates to the technical field of ammonia control and denitrification of kiln flue gas, in particular to an ammonia control and denitrification method for kiln flue gas for preparing cement from carbide slag based on waste heat utilization. According to the technical scheme, the method comprises the following steps that waste heat cooperative utilization is conducted, specifically, flue gas waste heat is subjected to graded utilization through three waste heat recovery systems, specifically, kiln bypass waste heat utilization is conducted, flue gas is extracted from a kiln bypass dechlorination high-temperature area at about 350 DEG C, and the overall energy consumption of the system is reduced; the atomization effect of the calcium nitrate solution is optimized by adopting the nano dispersing agent, and the sulfur resistance of the modified catalyst is combined, so that efficient and stable denitration reaction is realized, ammonia escape is accurately controlled, finally, the flue gas of the kiln can meet the ultralow emission requirement, and secondary pollution to the environment is greatly reduced; the modular reactor design and the dynamic predictive control technology enhance the adaptability of the system to complex working conditions, meanwhile, fuel consumption is further reduced through waste heat recycling and raw flue gas preheating, the service life of equipment is prolonged, and the operation cost of the system is remarkably reduced.

The utility model provides dry denitration equipment for a rotary cement kiln. The dry denitration equipment for the rotary cement kiln comprises a device body, a circulating box is fixedly connected to the device body, a circulating base is fixedly connected to the interior of the circulating box, a circulating pump is fixedly connected to the circulating base, a circulating pipe is fixedly connected to the circulating pump, a circulating output pipe is fixedly connected to the circulating pump, and the circulating output pipe is fixedly connected to the device body. A circulating pump is fixedly connected to the device main body, a circulating electromagnetic valve is arranged on the circulating pump, a water tank is fixedly connected to the device main body, a cooling distillation box is fixedly connected to the device main body, an ammonia gas input pipe is fixedly connected to the cooling distillation box, a condenser is fixedly connected to the ammonia gas input pipe, a liquid ammonia input pipe is fixedly connected to the condenser, and a liquid ammonia outlet pipe is fixedly connected to the liquid ammonia input pipe. A liquid ammonia box is arranged on the device main body, and an exhaust pipe is fixedly connected to the device main body. The dry denitration equipment for the rotary cement kiln has the effect of reducing environmental pollution.

The invention discloses an all-solid-waste negative-carbon porous brick and a preparation method thereof, belongs to the technical field of green building materials for solid waste recycling and CO2 capture-storage-utilization, and particularly relates to a porous brick which takes red mud, steel slag and recycled aggregate as main raw materials, constructs a hierarchical pore structure through low-water-binder-ratio semi-dry pressing molding, and is prepared from the following raw materials in a solid-solid-waste negative-carbon porous brick. And directional carbonization curing is carried out by using cement kiln tail gas CO2 under the conditions of normal temperature and micro pressure, so that the national waste porous brick with negative carbon characteristic is prepared. According to the method, solid waste high doping, CO2 efficient solid storage and product performance synergistic improvement can be achieved.

The invention discloses an intelligent operation judgment system for cement kiln equipment. The intelligent operation judgment system comprises a knowledge base unit, a data acquisition unit, a data processing unit, an intelligent analysis unit, a decision execution unit, a feedback optimization unit and a man-machine cooperation unit, the knowledge base unit stores historical fault cases, process rules and expert experience and supports root cause reasoning; the data acquisition unit acquires equipment operation full-dimension data in real time through sensor acquisition, visual perception acquisition and process parameter acquisition; and the data processing unit is used for performing low-delay data processing and lightweight model reasoning, preprocessing the data, performing real-time anomaly detection and executing a preset process rule. The system is reasonable in design, through real-time data acquisition, intelligent analysis and predictive maintenance, the production process is optimized, the energy consumption is reduced, the fault downtime is shortened, and through'sensing-transmission-analysis-decision 'closed-loop management, the production efficiency and safety are remarkably improved, and the maintenance cost is reduced.

The invention discloses a cement kiln thermotechnical diagnosis analysis method and system based on heat balance calculation, and relates to the field of cement kiln thermotechnical diagnos.The analysis method comprises the steps that a corresponding heat balance state is calculated by obtaining cement kiln thermotechnical parameters and material component data, the material balance relation between the material input quantity and the material output quantity of the cement kiln is analyzed; evaluating the energy utilization efficiency of the cement kiln firing system by taking the ratio of the cement kiln clinker formation heat to the input total heat as a thermal efficiency index, and generating a diagnostic index by combining a thermal balance state and a material balance relationship; and comparing the diagnosis index with a historical operation optimal value to determine a deviation condition, evaluating heat loss abnormity and an operation state of the cement kiln thermotechnical engineering according to the deviation condition, constructing a causal atlas to predict a development trend of the cement kiln thermotechnical engineering, and obtaining a cement kiln combustion control result. The method can help to understand how each factor affects the overall performance of the thermal system, and facilitates the optimization and adjustment of different parameters according to the causal relationship in the later stage.

The invention belongs to the technical field of flue gas denitration, and particularly relates to a denitration catalyst, a preparation method thereof and application of the denitration catalyst in flue gas denitration of a cement kiln. The denitration catalyst provided by the invention is prepared from the following raw materials: 5 to 10 parts of montmorillonite powder, 60 to 85 parts of titanium dioxide, 1 to 2 parts of stearic acid, 4 to 6 parts of metavanadate, 2 to 4 parts of glass fiber, 3 to 5 parts of niobium phosphate, 1 to 3 parts of carboxymethylcellulose and 1 to 3 parts of polyoxyethylene. When the denitration catalyst provided by the invention is applied to cement kiln flue gas denitration, the main active component vanadium poisoning of the catalyst can be effectively avoided, and the denitration activity of the catalyst is further improved.

The invention belongs to the technical field of liquid hazardous waste treatment, and particularly relates to a process for harmlessly treating liquid hazardous waste by using a cement kiln, which comprises the following steps: S1, conveying pretreated liquid hazardous waste to a temporary storage device by using a pumping device; s2, the liquid hazardous waste is temporarily stored and homogenized in the cache device; s3, the materials discharged from the temporary storage device are divided into four branches, four atomizing gun heads are evenly distributed in the same horizontal plane of the decomposing furnace, and the materials in the four branches are atomized through the four atomizing gun heads; and S4, atomizing the materials in the four branches, spraying the atomized materials into the decomposing furnace, and enabling the atomized liquid hazardous waste to be in full contact with high-temperature gas in the decomposing furnace and to be quickly combusted. The method does not affect the yield and quality of the cement kiln, can improve the disposal amount of the liquid hazardous waste, and achieves the effect of replacing a large amount of fire coal.

The application relates to the technical field of pavement materials, and particularly discloses a high-strength asphalt-based pavement material and a preparation method and application thereof. The high-strength asphalt-based pavement material comprises the following raw material components in mass fractions: waste rubber powder 60-80 parts, base asphalt 20-50 parts, sodium lignosulfonate modified petroleum resin 10-20 parts, deacidified waste oil 5-15 parts and solid filler 20-30 parts; wherein the raw material components of the solid filler comprise furan resin glass fiber reinforced material, cement kiln dust, blast furnace slag and coal gangue powder. The high-strength asphalt-based pavement material provided by the application has excellent road performance, can maintain good stability at low temperatures, is not prone to cracking, the raw material components are cheap and easy to obtain, the preparation cost is low, and the treatment pressure of solid waste can be effectively relieved.

The invention discloses a silicon mullite brick with high connection stability and a production process thereof, and belongs to the technical field of silicon mullite brick preparation. Through the composite formula design of the multi-graded silicon carbide aggregate and the in-situ generated mullite precursor and in combination with a microwave-air pressure coupling sintering process, the optimization of the material structure is realized. Wherein the silicon carbide aggregate is subjected to surface etching to form a microporous structure, and the microporous structure and the aluminum phosphate nanofiber reinforced matrix form a three-dimensional interlocking network; dual-band microwave alternate radiation and staged air pressure dynamic regulation and control are adopted, substance diffusion is promoted at low temperature, and meanwhile pore formation is inhibited at high temperature; and in the gradient cooling stage, the grain boundary stability is enhanced through controllable oxygen partial pressure and rare earth steam treatment. The process effectively improves the interface bonding strength and thermal shock resistance of the silicon mullite brick, reduces the sintering energy consumption, and is suitable for refractory material preparation of high-temperature equipment such as a cement kiln and an incinerator.

The invention discloses a system and a method for capturing cement kiln flue gas carbon dioxide based on a high-temperature flue gas waste heat regeneration technology. The system comprises a carbon dioxide absorption system and a carbon dioxide desorption system, the carbon dioxide absorption system comprises a pretreatment tower, an induced draft fan, an absorption tower, a water washing tower and a rich liquid pump; the carbon dioxide desorption system comprises a rich and lean solution heat exchanger, a lean solution pump, a desorption tower, a regenerated gas cooler, a lean solution cooler and a high-temperature flue gas waste heat recovery reboiler. Compared with the prior art, the system and method for capturing the cement kiln flue gas carbon dioxide based on the high-temperature flue gas waste heat regeneration technology can effectively utilize the cement kiln high-temperature flue gas to replace external heat source water vapor to desorb CO2, can effectively reduce the CO2 capturing cost, realizes the cooling of the cement kiln high-temperature flue gas, and improves the recovery rate of CO2. Good application prospects are realized.

The present invention discloses a high-concentration carbon dioxide capture system built on a cement kiln system and a low-carbon emission type cement clinker production line. Among them, the high-concentration carbon dioxide capture system includes a first decomposing furnace, a preheater assembly, a first gas-solid separator, a second decomposing furnace device, and a second gas-solid separator; the feed end of the first decomposing furnace is connected to the discharge end of the preheater assembly, and the intake end of the first decomposing furnace is connected to the cement kiln system; the inlet end of the first gas-solid separator is connected to the outlet end of the first decomposing furnace, the discharge end of the first gas-solid separator is connected to the second decomposing furnace device, and the outlet end of the first gas-solid separator is connected to the intake end of the preheater assembly; the inlet end of the second gas-solid separator is connected to the second decomposing furnace device. The low-carbon emission type cement clinker production line includes a cement kiln system, a high-concentration carbon dioxide capture system, and a carbon monoxide generation system that are connected to each other. The present invention effectively realizes the series connection and circulation of the production of cement clinker, carbon dioxide, and carbon monoxide.

The invention discloses a pre-heating and pre-decomposing device and method for co-production of acid from ardealite and outside a cement kiln, and the device is characterized in that pretreated ardealite, a siliceous raw material and an aluminum raw material are prepared into a raw material according to a specific proportion, the raw material is fed into a pre-heating system, and the raw material and hot flue gas from a decarburization and desulfurization furnace are subjected to countercurrent suspension pre-heating; the preheated mixture enters a decomposing furnace, is subjected to suspension reductive decomposition with reductive hot flue gas from a gasification furnace, and then is mixed and oxidized with high-temperature and high-oxygen air from a kiln head, so that a hot raw material with relatively high calcium oxide content is obtained; and the hot raw material enters the rotary kiln and is further subjected to mineralization reaction with the silicon-aluminum correction material to generate cement clinker. According to the method for co-producing acid from ardealite and preheating and pre-decomposing outside the cement kiln, preheating and decomposing of ardealite are completed in a suspended state, decomposing of ardealite in the kiln is converted into decomposing outside the kiln, and the effects of being high in heat and mass transfer efficiency, high in reducing agent utilization rate, high in production efficiency, low in system energy consumption, cost-reducing and efficiency-increasing can be achieved.

The invention discloses a desulfurizing agent for a cement kiln as well as a production method and application of the desulfurizing agent. The desulfurizing agent is prepared from the following raw material components in percentage by weight: 88-96 wt% of limestone; 2-6 wt% of an iron raw material; 1-6 wt% of gypsum; and 0-4 wt% of a silicon-aluminum material. The desulfurizer is produced by utilizing a kiln line of a cement enterprise, is dried and ground with raw materials according to a mass ratio of 1: 100 to 3: 100, and then is put into a cement kiln system for cement clinker production, so that the emission concentration of sulfur oxides in kiln tail flue gas produced by sulphoaluminate cement clinker can be reduced from more than 2000mg / Nm < 3 > to less than 35mg / Nm < 3 >; and for other types of cement clinker, the content of the cement clinker can be reduced from 1000 mg / Nm < 3 > or above to 35 mg / Nm < 3 > or below, the desulfurization effect is stable, and the environment-friendly emission requirement can be continuously met.

The invention belongs to the technical field of environmental protection, and particularly relates to a treatment method for recycling cement kiln flue gas mineralization solid waste gypsum coupling escape ammonia, which comprises the following steps: conveying original flue gas to a deamination tower, feeding an ammonia-containing ammonium sulfate solution output by a mineralization reactor into the deamination tower for deamination, washing the flue gas by using the ammonia-containing ammonium sulfate solution, and volatilizing ammonia in the process, therefore, the flue gas is desulfurized; the desulfurized ammonia-containing desulfurized flue gas is input into the decarburization tower to be subjected to water washing treatment, the ammonia water storage tank inputs ammonia water into the liquid storage area, the ammonia water in the liquid storage area is circularly conveyed to the decarburization area to be used for carrying out water washing on the ammonia-containing desulfurized flue gas to realize decarburization, and the decarburized flue gas enters the deamination area to be subjected to two-stage water washing treatment; the ammonia-containing decarburized flue gas subjected to two-stage water washing is input into an acid washing tower for acid washing, and ammonia in the flue gas is further removed; meanwhile, the liquid storage area conveys the mixed solution to the mineralization reactor. According to the invention, the desulfurization, decarbonization and mineralization functions are realized, the problem of ammonia escape is effectively solved, and the energy consumption of evaporative crystallization is reduced.

METHOD, APPARATUS, COMPUTER DEVICE AND STORAGE MEDIUM FOR DETERMINING ALTERNATIVE FUELS The present invention relates to a method, device, computer device and storage medium for determining an alternative fuel, the method comprising: obtaining a target fuel corresponding to a target cement kiln and a plurality of alternative component categories, property parameters, a maximum carrying capacity of an alternative fuel combination to be selected, as well as a fuel boundary condition, constructing an objective function and a constraint condition; Based on the objective function and the constraint conditions, calculating the initial alternative fuel combination ratio solution for each alternative fuel combination to be selected;using a non-dominated sequential genetic algorithm to optimize the initial alternative fuel combination ratio solution, and calculating the theoretical substitution ratio of each optimized alternative fuel combination; based on the theoretical substitution ratio, selecting a fuel combination from a plurality of alternative fuel combinations to be selected. Based on the theoretical substitution ratio, determining the alternative fuel component scheme corresponding to the target fuel from among the alternative fuel combinations to be selected. The invention solves the problem of fluctuation of working conditions in cement kilns due to the complexity of the composition of alternative fuels, and improves the accuracy and reliability of determining alternative fuels. Figure for abstract: none;

The invention discloses a carbon dioxide capture and concrete solidification integrated utilization system which comprises a cement kiln, a carbon capture device and a concrete premixing device, the carbon capture device is connected with the cement kiln so that the cement kiln can convey waste gas to the carbon capture device, the carbon capture device is provided with a washing cavity and a capture cavity, and the concrete premixing device is connected with the washing cavity. The waste gas flows into the trapping cavity after being subjected to water washing and dust removal through the water washing cavity, carbon dioxide in the gas is trapped by using an absorbent, the concrete premixing device is connected with the carbon trapping device, and the carbon dioxide trapped by the carbon trapping device is conveyed into the concrete premixing device so as to be sealed in concrete. By integrating a large amount of carbon dioxide generated in the production link of the cement industry and the process of improving the concrete strength by using carbon dioxide in the concrete production, the pollution and carbon dioxide emission of the traditional cement industry are greatly reduced, and meanwhile, the carbon dioxide is utilized in the hardening process of the concrete; therefore, a value-added building material product is obtained.

The invention relates to the technical field of pavement materials, and particularly discloses a high-strength asphalt-based pavement material as well as a preparation method and application thereof. The high-strength asphalt-based pavement material is prepared from the following raw material components in parts by mass: 60 to 80 parts of waste rubber powder, 20 to 50 parts of matrix asphalt, 10 to 20 parts of sodium lignin sulfonate modified petroleum resin, 5 to 15 parts of deacidified waste grease and 20 to 30 parts of solid filler, wherein the solid filler comprises the following raw material components: a furan resin glass fiber reinforced material, cement kiln ash, blast furnace slag and coal gangue powder. The high-strength asphalt-based pavement material provided by the invention has excellent pavement performance, can keep good stability at low temperature, is not easy to crack, is low in raw material components and easy to obtain, is low in preparation cost, and can also effectively relieve the treatment pressure of solid wastes.

The invention relates to the technical field of environmental management, and discloses an environmental economic benefit evaluation method and device for cement kiln cooperative disposal of hazardous wastes. The method comprises the following steps: respectively constructing a cement kiln co-processing hazardous waste scene model and a reference scene model through the same functional unit, and determining model system boundaries of different scene models; compiling a life cycle list based on the model system boundary; determining activity levels and emission factors of different scene models based on the life cycle list; based on the activity level and the emission factor, determining the environmental influence caused by the cooperative disposal of the dangerous waste by the cement kiln by adopting a life cycle evaluation (LCA) mode; based on the activity level and the market price level, determining the economic benefit generated by co-processing the hazardous waste by the cement kiln by adopting a net cost analysis (NC) mode; the model evaluation considers the thermal efficiency loss of the cement kiln, the input and transportation of raw and auxiliary materials, the change of the electric energy consumption of each production link, the change of pollutant emission and the like caused by the cooperative disposal of the dangerous waste by the cement kiln, and the accuracy of the model evaluation can be improved.

The invention relates to the technical field of high-temperature waste heat recovery, and discloses an energy-saving kiln flue gas waste heat recycling device which comprises a main body, the top of the main body is fixedly connected with a first auxiliary frame, and the side, close to the first auxiliary frame, of the main body is fixedly connected with a second auxiliary frame. Powder-gas separation is carried out through filtering of the filtering plate in the recycling box, then dust filtered out through the filtering plate falls into the ash bin to be collected, the collected dust can be used for batching or other purposes, the amount of chlorine in ash and chlorine in RDF brought into a cement kiln can be effectively reduced, the recycling box or other systems are prevented from being crust and blocked, and the recycling efficiency is improved. Compared with other processes, the device has the advantages that the heat loss is small, the heat recovery efficiency is high, the influence of a large number of chloride ions in the flue gas on a cement kiln system is reduced, the cement output quality is guaranteed, and the heat recovery efficiency is high.

An alternative fuel vertical pre-combustion furnace comprises a vertical combustion chamber furnace body, a multi-stage stepped furnace hearth arranged on the side wall of the pre-combustion furnace body and a pneumatic pulse injection device arranged on the furnace hearth, and castable is arranged on the inner wall of the whole furnace body. Light flammable substances are completely incinerated under the driving of high-speed airflow, heavier flame-retardant substances fall into the next step to be continuously incinerated, the burn-off rate of the alternative fuel is greatly improved after the alternative fuel stays, is scattered and is pre-combusted, and completely-combusted material residues are dispersed by strong injection of compressed air of an air cannon system; therefore, the influence on the cement kiln caused by sedimentation of the material slag agglomerated in the decomposing furnace is solved. And materials on the uppermost combustion platform sequentially slide to the second-stage combustion step platform and then slide to the next-stage combustion platform layer by layer, and the process is repeated. And waste gas and ash after incineration are discharged from the bottom of the pre-combustion furnace and enter a kiln tail decomposing furnace system, when the material slag is harmful to the kiln system, the material slag can be discharged, and high-temperature airflow enters the decomposing furnace.

The invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment device for a cement kiln solid waste co-treatment technology. The air inlet pipe is communicated with the shell; the first fixing plate is fixedly connected into the shell; the second fixing plate is fixedly connected into the shell; the first sliding frames are arranged on the first fixing plate in a sliding mode, the first sliding frames are rotationally provided with sliding sleeves, the sliding sleeves slide in the second fixing plate, and cloth bags are installed between the first sliding frames and the adjacent sliding sleeves; the exhaust pipe is communicated with the shell, all the first sliding frames are jointly provided with a driving mechanism, and the driving mechanism is used for controlling all the first sliding frames to respectively drive the adjacent cloth bags to shake. The first sliding frame drives the cloth bag to shake in a reciprocating mode, dust is accelerated to be separated from the cloth bag, and the continuous filtering duration of the cloth bag is prolonged.

The invention relates to the technical field of waste treatment processes, and discloses a secondary aluminum ash harmless treatment process, which comprises the following steps: collecting secondary aluminum ash for pretreatment, calculating the proportion range of secondary aluminum ash substitute raw materials required by cement production after pretreatment, feeding the secondary aluminum ash in the proportion range into a cement kiln or a cement kiln for calcination, and discharging the secondary aluminum ash into a furnace. According to the reaction characteristics of the secondary aluminum ash, a proper storage container is determined through comparison and analysis of multiple groups of data, the secondary aluminum ash is subjected to fast burning treatment, schemes A, B, C and D are set by controlling the addition of calcium salt, the roasting temperature and the duration, then the components of the calcined aluminum ash A, B and C are measured to adjust the mineral composition of the cement clinker, and meanwhile, a quenching process is adopted to adjust the mineral composition of the cement clinker. And the cement is produced by simulating an aluminum-containing raw material in actual cement production according to the replacement proportion of the optimal calcined secondary aluminum ash, and the treatment amount of the secondary aluminum ash can be maximized through the technological process.

The invention discloses a system and a method for low-energy-consumption carbon capture and purification of flue gas of a full-system oxygen-fuel combustion cement kiln, the system comprises an oxygen-fuel combustion cement clinker production system and a carbon capture and purification system, an air outlet at the top end of a preheater is respectively connected with a cooling medium inlet of the front two sections of a cooler and the carbon capture and purification system; the carbon capture and purification system comprises a precooler, a steam-water separator, a first booster fan, a vacuum pressure swing adsorption system, a second booster fan, a flue gas deep purification system, a refrigerator and a rectification system, and the volume fraction of CO2 in gas recovered by the vacuum pressure swing adsorption system is 85-97%; a recovered gas outlet of the vacuum pressure swing adsorption system is sequentially connected with a second booster fan, a flue gas deep purification system, a refrigerator and a rectification system, and a gas outlet of the rectification system is connected with an inlet of the vacuum pressure swing adsorption system. According to the invention, stable operation of the full-system oxygen-fuel combustion system is realized, and meanwhile, the overall CO2 recovery rate of the carbon capture and purification system is improved, so that the carbon capture CO2 recovery rate is greater than or equal to 95%.

The utility model discloses a cement kiln head and tail dust collecting device, which belongs to the field of cement processing and comprises a bottom plate, the top of the bottom plate is fixedly connected with an atomizing box and a filter box, the top of the filter box is fixedly connected with an exhaust fan, a communicating pipe is fixedly connected between the atomizing box and the filter box, and an atomizing mechanism is arranged in the atomizing box. A filter mechanism is arranged in the filter box, the filter mechanism comprises a filter plate, a cleaning mechanism is arranged below the filter plate, the cleaning mechanism comprises a mounting frame, a brush roller is rotationally connected between the inner walls of the mounting frame, a plurality of bristles abutting against the filter plate are fixedly connected to the brush roller, and the cleaning mechanism further comprises an air supply assembly and a moving assembly. The cleaning device has the beneficial effects that the cleaning mechanism is arranged, the cleaning mechanism comprises a brush roller, ventilation holes are formed in the brush roller, air is supplied through an air supply assembly while the brush roller cleans the filter plate, dust attached to the filter plate is dried through air blown out of the ventilation holes, the cleaning effect is improved conveniently, and meanwhile the dust is prevented from being attached to the brush roller.

The present invention relates to the technical field of alternative fuel in the cement industry. Disclosed is a high-proportion alternative fuel pre-treatment and cement kiln incineration system, comprising a stacking shed, a storage system, a rotary kiln, a pulverized coal burner, a cooler, a tertiary air duct and a preheated raw-material preheater; and further comprising a crushing system, a homogenization system, metering systems, conveying systems, gravity-type feeding systems, a multifunctional decomposition furnace, a special combustor for alternative fuel, and a pneumatic conveying system. In the present invention, the particle size of crushed alternative fuel is controlled on the basis of a flue gas suspension speed, such that the alternative fuel combusts in a suspended manner in the multifunctional decomposition furnace; the alternative fuel is metered by means of the three metering systems, and the alternative fuel in one path is fed into the special combustor; the special combustor and the pulverized coal combustor are arranged one above the other in the rotary kiln, and pulverized coal combustion is used to drive the combustion of the alternative fuel; and the gravity-type feeding systems and their respective two airlock discharge valves, which are alternately opened, are used to feed in the alternative fuel, thereby reducing air leakage during a feeding process.

The invention relates to the field of rotary cement kiln process parameter prediction, and particularly discloses a rotary cement kiln process parameter prediction method based on mechanism and data collaboration, which comprises the following steps: selecting production-related parameters from production data of a rotary cement kiln according to a cement clinker firing mechanism, and recording the parameters as process parameters of the rotary cement kiln; sampling data of each time of the process parameters are collected, preprocessing of missing value filling, abnormal value elimination, mean filtering, time matching and homogenization is carried out, and a preprocessed data set of the process parameters of the rotary cement kiln is obtained; selecting a target process parameter, evaluating the correlation degree between other process parameters and the target process parameter, screening a key variable of the target process parameter, and training a prediction model of the target process parameter in combination with an LSTM model; the prediction model is constructed by pertinently selecting the variables which are highly correlated with the target process parameters, so that the prediction model accurately captures the change rule of the target process parameters, and the prediction precision is improved.