364 results about "Cement kiln" patented technology

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 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 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 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.

This invention relates to a method for preparing lightweight building materials with high carbon sequestration and high strength, comprising the following steps: preparation and activation of biochar; mixing biochar with solid waste raw materials to obtain a mixture; preparing biochar-modified lightweight aggregate in a granulator; curing the obtained lightweight aggregate according to a process of pre-curing – carbonization curing – subsequent wet curing; and drying to obtain lightweight building materials. This invention uses activated biochar as a modifying material, uses fly ash, coal gangue, desulfurized gypsum, and other multi-element solid wastes instead of cement as raw materials, uses blast furnace slag instead of traditional silicone, vinyl acetate (VAM) emulsion, polyurethane, etc., as binders, and uses CO2 from flue gas emitted from steelmaking furnaces, cement kilns, and coal-fired power plants for carbonization curing. This achieves optimized control of the internal pore structure of the lightweight aggregate and accelerates the carbonization reaction rate between CO2 and the internal and external aggregate media, effectively improving the overall carbonization degree and CO2 adsorption performance of the lightweight aggregate.

A method and system for automating control procedures in a cement kiln (102) are disclosed. The method involves receiving historical data collected over a specific period, analyzing the data to identify interrelationships between modifications of input parameters and variations in process parameters, and determining an effectiveness parameter for each control procedure based on these interrelationships. The processor (202) selects a control procedure from a plurality of control procedures based on the effectiveness parameter and generates a control parameter sequence accordingly. This sequence of modifications is dynamically adjusted to adapt to real-time conditions of the cement kiln (102) and executed to achieve kiln stability efficiently. The system includes a memory (204) for storing historical data and a processor (202) configured to receive, analyze, and prioritize parameters, identify interrelationships, determine effectiveness parameters, select control procedures, and execute dynamically adjusted control sequences. This automation ensures optimized kiln operation, stability, and clinker quality.

This invention relates to the field of cement production technology and discloses a method for evaluating the combustion state of a cement kiln based on sulfur detection. The method includes the following steps: S1, within a set time period, obtaining a fixed amount of hot raw meal from the feed pipe of the final preheater and a fixed amount of clinker from the clinker hopper; S2, detecting the mass percentage of sulfur in the obtained hot raw meal and clinker, and determining the sulfur circulation ratio M within the cement kiln based on the ratio of the mass percentage of sulfur in the hot raw meal to the mass percentage of sulfur in the clinker; S3, evaluating the combustion state at a set process location within the cement kiln based on the sulfur circulation ratio, and identifying process locations with unreasonable combustion states. This method overcomes the limitations of traditional methods that rely solely on CO detection at the kiln tail and smoke chamber, which cannot accurately reflect the fuel combustion state. Therefore, it can more accurately and promptly evaluate the fuel combustion state within the kiln system and quickly determine process locations that need adjustment.

This utility model relates to the field of cement production technology, and in particular to a cement kiln that uses waste tires as fuel for cement clinker calcination. It includes a base, with the main body of the cement kiln fixedly installed on the top of the base. A burner is fixedly installed on the right side of the base, and a feeding cylinder is fixedly installed on the top of the burner. A drive motor is fixedly connected to the top of the feeding cylinder, and the output end of the drive motor passes through the inner cavity of the feeding cylinder and is fixedly connected to a crushing shaft. This utility model can treat exhaust gas. During use, the exhaust pipe guides the exhaust gas, and during this guidance, the water in the recovery box recovers and treats the exhaust gas. Simultaneously, the exhaust gas is introduced into the treatment box, allowing the filter plate, filling box, and adsorption packing material to treat the exhaust gas. Furthermore, during use, the feeding cylinder, drive motor, crushing shaft, and spiral shaft guide tire material into the burner, enabling the use of waste tires as fuel.

The invention relates to the technical field of energy conservation and environmental protection, and discloses a cement kiln bypass air discharge dechlorination and waste heat recovery system and method.The cement kiln bypass air discharge dechlorination and waste heat recovery system comprises an air taking device which stretches into a cement kiln smoke chamber to extract high-temperature mixed smoke containing dust, and a probe assembly and a first-stage dust removal unit are integrated on the air taking device; the heat exchanger unit is communicated with an outlet of the primary dust removal unit, and the secondary dust removal unit is communicated with an outlet of the heat exchanger unit, comprises an induced air booster fan arranged at the downstream of the secondary dust removal unit, and is used for providing power for the system and conveying purified flue gas to waste heat utilization equipment; the oxygen supplementation loop is used for taking air from a clean air source and accurately injecting the air into the air taking device through an oxygen supplementation electric control valve; and the control unit is electrically connected with the probe assembly, the sensors, the air taking electric control valve, the oxygen supplementing electric control valve and the induced air booster fan, and cooperatively controls the bypass air releasing amount and the oxygen supplementing amount through a built-in algorithm according to real-time detection parameters, so that the energy consumption cost of an enterprise is reduced, and greenhouse gas emission is reduced.

The utility model belongs to the field of SCR denitration technology, concretely relates to carbide slag cement kiln low temperature low dust SCR denitration device, including denitration jar, the front of denitration jar is provided with ammonia sprayer, the downside fixedly connected with three annular array arrangement's support foot of denitration jar, the inner wall fixedly connected with the air inlet pipe of denitration jar, the horizontal portion outside of air inlet pipe is provided with front filter cartridge. This scheme can use the flow of the input flue gas through the setting of the gas pipe, under the action of the filter screen, can use the front filter of the large particle impurities in the flue gas, under the action of the liquid inlet pipe, rotating pipe, nozzle and other structures, can spray the water, and then use the backwash of the filter screen, to ensure the flow of the filter screen, and under the action of the motor, gear two and other structures, can drive the rotating pipe, nozzle to rotate, to ensure the good cleaning effect of the nozzle.

The utility model discloses a ceramic inner cylinder hanging piece fixing seat for a cement kiln preheater, which relates to the technical field of preheater hanging piece fixing and comprises a fixing base and a rubber pad which is arranged on the fixing base and fixedly connected with the fixing base. The number of the threaded holes is two, and the two threaded holes are formed in the fixed base and fixedly connected with the fixed base; the number of the bolts is two, and the two bolts are arranged in the threaded holes and matched with the threaded holes; and the fixing mechanism is arranged on the fixed base. According to the device, the fixing mechanism is arranged, and the hanging piece can be fixed through the fixing mechanism, so that the hanging piece is stably fixed in the inner cylinder of the preheater. According to the device, the hanging pieces can be disassembled through the fixing mechanism, meanwhile, the hanging pieces are disassembled conveniently, replacement operation of the hanging pieces is facilitated, the time used for replacement is shortened, and the working efficiency is improved.

The application discloses a kind of calcined coal gangue composite clinker low-carbon preparation system and preparation method based on cement production line, including cooling machine, vertical cylinder preheater, cyclone separator, prehydroxyl removal device, condenser and oil-water separator;The application proposes to use prehydroxyl removal device, combined with cooling machine to prepare composite clinker by calcining coal gangue, and the removed water does not enter the cement kiln firing system, and the prehydroxyl removal high-temperature coal gangue is calcined and activated in the cooling machine, the method is simple, has little effect on the cement kiln firing system, and the prepared calcined coal gangue active material has good quality and low cost, the coal gangue disposal amount is large, the heat value utilization rate is high, can reduce the energy consumption and carbon emission of cement industry, and has good economic benefit and social benefit.

The utility model relates to an anti-blocking device for a cyclone cone of a cement kiln preheater, and belongs to the technical field of cyclone preheaters. The cyclone cylinder comprises a cyclone cylinder body and a cyclone cylinder conical part which are distributed up and down; the anti-blocking device comprises an ash removal pipe, an air pressure measuring pipe, a fixed pipe and an anti-blocking rod; an ash removal pipe is arranged at the upper end of the side wall of the cyclone cone part, an air pressure measuring pipe is arranged on the side wall of the cyclone cone part, an upper layer of fixing pipes and a lower layer of fixing pipes are fixedly arranged at the middle height position of the outer wall of the cyclone cone part, and each layer of fixing pipes are symmetrically arranged on the two sides of the cyclone cone part. The same anti-blocking rod is inserted into the two symmetrical fixing pipes, and the fixing pipe on the upper layer is perpendicular to the fixing pipe on the lower layer. The problem that a conical part of an existing cyclone cylinder is prone to being blocked is solved.

The application provides a system for co-processing waste lithium ion batteries in a cement kiln, which comprises an electrified crushing device, a high-temperature pyrolysis device, a cement kiln, a cooling device, a coarse crushing device, a fine crushing device and an airflow sorting device; the gas inlet of the electrified crushing device is connected to the kiln tail low-oxygen tail gas of the cement kiln through a pipeline, and electrolyte generated when the first crushing knife splits or shears the material is subjected to high-temperature drying treatment; a nitrogen gas compression tank is connected to the nitrogen gas inlet; an air extraction guide pipe is connected to the mixed gas outlet, and the mixed gas composed of nitrogen gas and the kiln tail low-oxygen tail gas is discharged to the mixed gas compression tank under negative pressure; the mixed gas compression tank discharges the mixed gas under negative pressure to the high-temperature pyrolysis device; the discharge port of the crushing device is connected to the high-temperature pyrolysis device through a feeding guide rail; the high-temperature pyrolysis device is connected to the kiln tail low-oxygen tail gas of the cement kiln; and the high-temperature pyrolysis device is connected to the kiln head of the cement kiln. The application can realize low energy consumption, safety and reliability, and qualified VOCs gas.

The present disclosure provides a kind of cement kiln SCR denitration system with acoustic wave soot blower device, cement kiln SCR denitration system with acoustic wave soot blower device can include: acoustic wave generator and first function structure, acoustic wave generator has acoustic wave output port, acoustic wave generator is configured to at least output first acoustic wave and second acoustic wave by acoustic wave output port, first acoustic wave propagates along first propagation path, second acoustic wave propagates along second propagation path different from first propagation path;First function structure is provided with at least one first function area, first function area is arranged on second propagation path, for interacting with second acoustic wave, to at least generate third acoustic wave of propagation direction change and intensity less than second acoustic wave, third acoustic wave propagates along third propagation path, and first propagation path and third propagation path all pass through first target surface, so that first acoustic wave and third acoustic wave can all act on first target surface, first target surface is the surface where the area to be cleaned or cleaned of slag is located.

The invention belongs to the technical field of refractory materials, and particularly relates to a composite castable for a cement kiln coal injection duct and a preparation method and application of the composite castable for the cement kiln coal injection duct. 15-20% of silicon carbide particles; 8-12% of dispersed alumina micro powder; 4-6% of calcium aluminate cement; the content of SiO2 in the rare earth modified silica fume is greater than or equal to 94%, and the rare earth modified silica fume is doped with 0.5-1.5 wt% of Y2O3; 3% to 5% of ZrO2-TiO2-Al2O3 precursor powder, 2% to 5% of ZrO2-TiO2-Al2O3 0.1%-0.3% of a water reducing agent; 0.05 to 0.1 percent of a retarder; and the balance of water. According to the castable, ZrO2-TiO2-Al2O3 precursor powder is added, in-situ reaction is carried out at the temperature of 1100-1300 DEG C, micro-expansion and sintering shrinkage are dynamically matched, cracking is avoided, thermal stability is remarkably improved through doping of Zr < 4 + >, and once the ZrO2-TiO2-Al2O3 precursor powder is formed, a Zr-doped aluminum titanate crystal phase cannot be decomposed or reversed in a high-temperature environment in follow-up service, and the structural stability can be kept.

The invention discloses an alternative fuel distributing and conveying system which comprises a surge bin connected with feeding equipment; the double-discharging-port conveying mechanism is located under the buffering bin, a feeding port of the double-discharging-port conveying mechanism is communicated with a round opening in the bottom of the buffering bin, and the double-discharging-port conveying mechanism is provided with two discharging ports which are communicated with the two stock bins respectively; the multiple arch breaking mechanisms are evenly installed on the surge bin, and each arch breaking mechanism can stir and loosen materials accumulated on the bin wall in the surge bin; and the automatic spraying system is mounted at the inner top of the surge bin, and the automatic spraying system is controlled by the temperature monitoring system to spray and extinguish the combustion materials in the surge bin. The material characteristics of the alternative fuel required by the cement kiln are combined, multi-point distribution conveying of the alternative fuel is achieved, and stable conveying of the alternative fuel is guaranteed.

The present application relates to the technical field of adsorbent, in particular to a semi-volatile heavy metal adsorbent suitable for cement kiln co-processing and a preparation method thereof.The preparation method comprises the following steps: step 1, mixing kaolin, calcium oxide and water to form a slurry, preparing a foaming agent into a foam, adding the foam into the slurry to stir, and obtaining a semi-dry high-calcium material; step 2, mixing kaolin, aluminum hydroxide and water to form a slurry, preparing a foaming agent into a foam, adding the foam into the slurry to stir, and obtaining a high-aluminum slurry; step 3, mixing and stirring the semi-dry high-calcium material and the high-aluminum slurry, and then performing die pressing forming and curing to obtain the semi-volatile heavy metal adsorbent.The present application successfully prepares an adsorbent material capable of efficiently adsorbing semi-volatile heavy metals in cement kiln co-processing, and can improve the environmental safety of waste co-processing in a cement kiln.

The utility model provides a cement kiln collaborative special material treatment device which comprises a decomposing furnace, a rotary kiln, a storage pool, a clinker outlet, a material treatment device, a feeding pipeline, a first air blower, a gas cooler, a cyclone separator, a dust treatment device, a dust collector, an induced draft fan, an odor treatment system, a dilution cooler and a second air blower. The rotary kiln is cast and connected to the lower part of the decomposing furnace through bolts and is communicated with the decomposing furnace; the right side of the rotary kiln is built on the left upper side of the interior of the storage pool; the clinker outlet is formed in the right lower side of the front part of the storage pool. By utilizing the advantage of high-temperature calcination of the cement kiln, hazardous wastes such as strong acid, strong alkali and strong oxidizing property are incinerated at high temperature, so that the generated waste gas is cleanly discharged after being treated by a denitrification system, a desulfurization system and the like, and the generated residues are solidified into clinker through mineralization reaction of materials, so that the generation of secondary pollutants can be avoided; and clean, reduced and harmless treatment is realized.

The invention discloses a porous nozzle combustor and a targeted adding combustion device of a cement kiln, and solves the problem that stable production of the cement kiln is affected due to non-uniform heat distribution caused by complex and changeable properties of alternative fuels in the prior art. The multi-hole nozzle combustor comprises a feeding cavity and a mixed spraying cavity which are connected, a multi-hole nozzle is arranged at the outlet end of the feeding cavity and comprises a center gas nozzle and a plurality of side nozzles, the side nozzles are distributed on a circle with the center gas nozzle as the center, a ventilation pipeline is arranged in the feeding cavity, and the mixed spraying cavity is communicated with the center gas nozzle. The ventilation pipeline is communicated with the central gas nozzle, and the side nozzles are communicated with the feeding chamber; and flow guide fins are arranged in the mixed spraying chamber and are spirally arranged by taking the central gas nozzle as a circle center. According to the porous nozzle burner, optimized nozzle layout and mixed spraying cavity design are adopted, and pyrolysis gas and solid products are promoted to be fully mixed; the flow guide fins spirally arranged in the mixed spraying cavity enable pyrolysis gas to form rotating gas flow, the rotating gas flow violently collides and wraps solid particles, a stable and efficient combustion gas-solid flow state is formed, and the combustion stability is improved.

The invention relates to the technical field of solid waste recycling, and discloses a solid waste fuel preparation device capable of replacing cement kiln pulverized coal fuel, the solid waste fuel preparation device comprises two groups of supporting seats which are symmetrically distributed at the bottom of a screening outer cylinder, the screening outer cylinder is slightly inclined, and a magnetic separation inner cylinder is rotatably arranged in the screening outer cylinder; the outer side of the magnetic separation inner cylinder is connected with the inner wall of the screening outer cylinder through two sets of inner bearings, and the outer side of the magnetic separation inner cylinder is sleeved with a large gear. According to the invention, the cam part is designed, on one hand, the moving cam part also enables the fuel rod to be forced to turn over under the action of a cam, so that the fuel rod in the gluing groove can be turned over and glued at the same time, and the gluing uniformity is improved; and on the other hand, the cam part is in contact with a sliding head below the cam part in the downward movement process, extrusion acting force is generated to enable a telescopic column to retract, a pressure plug is driven to move in a hydraulic cavity, and the adhesive enters two sets of adhesive spraying pipes and is sprayed outwards from the flower umbrella head, so that the adhesive is uniformly sprayed to the area of the adhesive coating part.

The utility model relates to cement kiln equipment technical field, concretely relates to a kind of preheater wide body ceramic inner cylinder for cement kiln, including multiple annular distribution's hanging piece unit each hanging piece unit includes fixed seat and stabilizing lock piece, multiple ceramic hanging pieces connected at head and tail are installed between fixed seat and stabilizing lock piece, the connecting place of two ceramic hanging pieces connected is equipped with transverse gap, longitudinal gap is set between the two adjacent hanging piece units, stabilizing briquetting is installed at the intersection of transverse gap and longitudinal gap, the connection strength between the two adjacent hanging piece units can be strengthened by the installation of stabilizing briquetting, avoid the phenomenon that the two adjacent hanging piece units appear front and rear misregistration after material falling and hanging piece impact when using, to reach the purpose that the overall inner cylinder structure stability is improved.

The invention belongs to the field of cement kiln denitration, and particularly relates to a cement kiln accurate denitration system which comprises a denitration tower, a first supporting side plate, a second supporting side plate, a supporting top plate, an injection assembly, a driving assembly, an overturning plate, a spray head, a sealing assembly and a communication assembly. The communicating assembly is installed on the supporting top plate and connected with the communicating assembly, the output end of the communicating assembly is connected with the top of the overturning plate, the injection assembly is installed on the supporting top plate and connected with the communicating assembly, the two sealing assemblies are symmetrically installed on the outer walls of the two second supporting side plates, and the output ends of the sealing assemblies are connected to the end of the overturning plate in a clamped mode. Therefore, when the spray head is replaced, the spray head does not need to enter the denitration tower, the disassembly and replacement operation can be directly completed outside the tower, and the core problems that in the background technology, the spray head is fixedly installed in the denitration tower, shutdown cooling and flue gas emptying are needed during replacement, the spray head needs to enter a narrow tower for operation, the operation difficulty is large, time and labor are consumed, and potential safety hazards exist are solved.