539 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 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 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.

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 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 discloses an AI-based intelligent regulation and control method and equipment for low-carbon combustion of hydrogen fuel of a cement kiln, and belongs to the technical field of cement industry. According to the method, through multi-source data acquisition and preprocessing, AI model construction and training, intelligent regulation and optimization and closed-loop verification and iteration, intelligent optimization regulation and control of the hydrogen fuel combustion process are realized, so that the thermal efficiency is improved, and the carbon emission intensity is reduced; the content of constructing the AI model and training comprises the following steps: constructing a multi-objective optimization model based on a specific algorithm, and training the model through supervised learning and reinforcement learning by taking kiln operation parameters as input and optimal combustion control parameters as output; the content of intelligent regulation and control and optimization comprises the steps that data are collected in real time and input into an AI model, multi-target optimization is achieved in combination with MPC and a self-adaptive optimization algorithm, and therefore the dynamic self-optimization capacity is achieved. The thermal efficiency of the cement kiln can be remarkably improved, and the carbon emission strength is greatly reduced.

The invention relates to the field of rotary kilns, and discloses a rotary cement kiln which comprises a rotary kiln body, a kiln door and a firing port, the kiln door is installed on the upper portion of the front face of the rotary kiln body, a handle is installed on the kiln door, and a heating chamber is arranged on the upper portion in the rotary kiln body. A firing opening is formed in the lower portion of the left side face of the rotary kiln body, an air exhaust structure is arranged at the position, close to the lower edge, of the right side face of the rotary kiln body, under the action of a driving structure, a switching sleeve with a filter element replaced can be switched into a corresponding switching pipe, and then a switching sleeve with a filter element needing to be replaced is switched from the other switching pipe. And meanwhile, the corresponding switching pipes can be automatically opened and blocked, so that when the filter elements are replaced, the normal operation of the processing work can be ensured, meanwhile, the loss of hot air flow can be reduced, dust in air is prevented from entering the kiln, and the processing work quality is improved.

The utility model provides cement kiln tail high-temperature low-dust SCR (Selective Catalytic Reduction) denitration equipment capable of realizing off-line ash removal, which comprises a high-temperature bag dust collector, a denitration reactor, a flue, more than two compartments, a flap valve assembly and an ash removal assembly for carrying out ash removal treatment on a filter bag to be cleaned of the high-temperature bag dust collector, all the compartments are arranged at the top of the high-temperature bag dust collector, the denitration reactor is arranged beside the high-temperature bag dust collector, the flue is located between the compartments on the two sides, and the flue is communicated with an air inlet of the denitration reactor; the air inlets of the sub-chambers are communicated with the corresponding high-temperature bag dust collectors, and the flap valve assemblies are located at the air outlets of the sub-chambers and used for communicating or blocking the air outlets of the sub-chambers with the flue; the flap valve assemblies are closed, the air outlets of the sub-chambers are blocked from the flue, the sub-chambers are unloaded, and smoke does not circulate in the sub-chambers, so that off-line ash removal of the high-temperature bag dust collector is achieved, and the single-chamber ash removal effect is more thorough.

The invention belongs to the technical field of cement kiln flue gas treatment, and particularly relates to a carbide slag cement denitration ammonia escape control and utilization system, and a modification method of the carbide slag cement denitration ammonia escape control and utilization system comprises the following steps: changing a drying crusher into an indirect dryer, indirectly exchanging heat between flue gas at an outlet of a preheater and carbide slag, and drying the flue gas at an outlet of the indirect dryer; a waste gas outlet of the indirect dryer is connected with an inlet of the ammonia gas absorption device, and an outlet of the ammonia gas absorption device is communicated with a drying medium outlet of the indirect dryer. The invention provides a carbide slag cement denitration ammonia escape control and utilization system.

The method comprises the following steps that S1, dry materials and a binding agent are provided, and the dry materials comprise 19 wt%-24 wt% of intaglio corundum with the particle size being 3-5 mm, 22 wt%-35 wt% of intaglio corundum with the particle size being 1-3 mm, 12 wt%-19 wt% of white corundum with the particle size being 0-1 mm, 18 wt%-24 wt% of white corundum fine powder with the particle size being smaller than 200 meshes and 2 wt%-4 wt% of composite metal powder; s2, the dry material and a binding agent are mixed and ground, and a mixed and ground material is obtained; and S3, molding and drying the mixed and ground material to obtain the fire-resistant heat-insulating brick. The refractory brick produced by adopting the inked corundum and the white corundum as main raw materials, adding the composite metal powder and adding the additional binding agent has the advantages of high strength, good thermal shock resistance, good permeability resistance, good erosion resistance and long service life, and can be widely applied to rotary kilns, cement kilns and other parts.

The invention provides a process for preparing cement from aluminum electrolysis overhaul residues and waste anti-seepage material lithium extraction residues, and relates to the technical field of solid waste co-treatment and resource utilization, and the process comprises the following steps: mixing pretreatment: crushing and grinding mixed raw materials, adding a calcium-based fluorine fixing agent, and roasting to decompose cyanide and stabilize fluoride; preparing a cement raw material: mixing the mixed residues with other raw materials according to a certain ratio, adjusting the ratio value, and grinding to prepare the cement raw material; calcining the clinker, namely calcining the raw material at high temperature, treating flue gas, and quickly cooling to obtain the cement clinker; according to the invention, a carbonaceous material in the overhaul slag is utilized to provide part of heat, so that the energy consumption is reduced; fluorides in the two wastes react with each other to generate a more stable compound, so that the fluorine curing efficiency is improved, and the environmental risk is thoroughly eliminated; heavy metal is further solidified in a cement kiln high-temperature environment, harmless treatment is achieved, the resource utilization rate is increased, and product performance is reliable.

The system comprises a drying machine, the drying machine comprises a discharging box, the feeding end of the discharging box is connected with an outer-layer cylinder, a middle-layer cylinder and an inner-layer cylinder which are concentrically arranged and provided with refractory materials, an outer ring chamber is formed between the outer-layer cylinder and the middle-layer cylinder, an inner ring chamber is formed between the middle-layer cylinder and the inner-layer cylinder, and the outer-layer cylinder, the middle-layer cylinder and the inner-layer cylinder are arranged in parallel; a discharging system is arranged in the discharging box; the outer conveying system is arranged in the outer ring chamber and used for conveying the hot raw materials; the inner conveying system is arranged in the inner ring chamber and is used for conveying sludge; and the air guide system is arranged on the inner cylinder wall of the inner-layer cylinder and used for introducing tertiary air into the inner ring chamber.

The utility model belongs to the field of sludge treatment, and particularly relates to a novel sludge treatment device based on a cement kiln, which comprises a base, a combustion device is mounted on the upper portion of the base, the cement kiln is mounted on the upper portion of the combustion device, and a sintering kiln is arranged in an inner cavity of the cement kiln. A feeding end seat penetrating through the outer part of the cement kiln is mounted on the sintering kiln, and a discharging end seat penetrating through the cement kiln is mounted at the top of the sintering kiln; the turnover mechanism comprises a motor mounted in the middle of the sintering kiln; a sintering kiln is improved, through cooperation of a turnover mechanism and a cage bin mechanism, simultaneous sintering of multiple bins is achieved, gaps are reserved inside through separation rods, sufficient gaps are reserved between sludge and cement raw material mixtures, contact with a combustion heat source is facilitated, and after combustion is conducted for a period of time, the sintering bins can be switched through rotation of a cage frame; and in the rotating process, the mixture of the sludge and the cement raw materials can be turned over, and sufficient sintering is achieved in all the sintering bins.

This invention discloses a bypass-coordinated dechlorination and stratified filtration dust collector for cement kilns, and a dechlorination and dust removal method, suitable for high-temperature flue gas treatment within a temperature window of 200~300℃. The dust collector includes a filter housing, within which a dechlorination chamber, a dust removal chamber, and a clean gas chamber are sequentially formed along the flue gas flow direction. The dechlorination chamber is equipped with an alkaline dry powder injection device and an S-shaped flow guiding structure composed of baffles and inclined guide plates. By extending the flue gas path and counter-current injection, the alkaline agent reacts fully with trace amounts of HCl gas to generate solid chloride salts. The dust removal chamber is equipped with an array of double-layer filtration devices, consisting of an inner filter bag and an outer filter screen forming a sandwich cavity. The inner wall of the inner filter bag is equipped with an adaptive beam shaping component, which can drive the filter bag to partially expand outward and abut against the outer filter screen during shock wave backflushing, dividing the sandwich cavity into several flow-limiting channels. After backflushing, the cavity is reset to an integrated space. This invention achieves integrated synergistic operation of fine dechlorination and efficient dust removal, with a simplified structure and stable and reliable operation.

The invention relates to a method for co-processing low-flash-point low-calorific-value waste liquid in a cement kiln, and belongs to the technical field of environmental protection. The low-flash-point low-calorific-value waste liquid is conveyed to a pressure-stabilizing and flow-stabilizing tank and then is stably output to a low-pressure gasification preheater; the low-pressure gasification preheater is used for heating the waste liquid by utilizing low-grade waste heat of the cement kiln system and gasifying the waste liquid; the gas-liquid mixed phase is conveyed to a kiln head cover nozzle and a decomposing furnace nozzle through a special conveying pipeline, and heat energy is released and thoroughly decomposed; the inner wall of the special conveying pipeline is coated with a malonyl urea-epoxy resin composite coating; the malonyl urea-epoxy resin composite coating is prepared from epoxy resin, malonyl urea, methylbenzene, amino ferrocene and additional amino ferrocene; after the flue gas is co-treated by the cement kiln disclosed by the invention, the concentration of benzene and chlorobenzene in the flue gas is remarkably reduced, and the requirements of environment-friendly emission are met.