132 results about "Lime kiln" patented technology

The invention relates to the technical field of lime kiln control, and discloses a lime kiln partition intelligent temperature control system and a storage medium, and the system comprises a data collection unit which is used for collecting state data of each region of a lime kiln; the working condition recognition unit recognizes working conditions based on the state data; the temperature control unit is provided with a PID (Proportion Integration Differentiation) control strategy and a prediction control strategy, and the opening degrees of the fuel regulating valves and the air regulating valves in different areas in the lime kiln are calculated according to the corresponding control strategies selected on the basis of working conditions; the discharging control unit is provided with a balance control strategy, the balance control strategy obtains the current discharging speed through the current productivity of the lime kiln and the material level height in the lime kiln, and the execution unit correspondingly controls the lime kiln according to the control quantity. The method effectively solves the problems of difficulty in multi-area coordination, poor working condition adaptability, high energy consumption and the like in a traditional control mode, and has the remarkable advantages of improving the temperature control precision, ensuring the production stability and reducing the energy consumption.

The invention relates to the technical field of industrial environmental protection, in particular to a double-hearth lime kiln low-emission collaborative dust removal system and a control method. The control method comprises the steps that a flue gas sensing module collects real-time flue gas parameters and kiln body working condition data; the working condition linkage regulation and control unit dynamically adjusts operation parameters of the dust removal equipment through a fuzzy PID working condition matching algorithm; the regional collaborative dust removal assembly performs differential dust removal according to flue gas characteristics and treatment requirements of different dust raising points, and flue gas flow guide is performed through a double-hearth time sequence valve group during kiln body switching; the noise elimination and vibration isolation cooperation unit adjusts the noise elimination amount and the vibration isolation damping according to the rotating speed of the draught fan and controls noise and vibration. The tail gas deep purification unit evaluates the dust removal state through a flue gas and dust coupling model, carries out deep treatment on the dedusted tail gas and controls the tail gas emission concentration; the anti-blocking optimization unit carries out cooperative anti-blocking through dynamic rapping and airflow purging based on historical operation data and real-time working conditions. Therefore, the problems of poor dust removal stability, high operation energy consumption and the like in the prior art are solved.

The utility model discloses a system for producing sodium carbonate by using carbon dioxide and carbide slag in boiler flue gas, which is characterized in that the boiler flue gas discharged by a coal-fired boiler is purified and then enters a carbonization tower instead of part of lime kiln gas to react with ammoniacal salt water to generate NaHCO3, the NaHCO3 is calcined to generate a final product sodium carbonate, carbon is fixed to the final product, and the emission of CO2 is reduced; and meanwhile, the consumption of CO2 generated by calcining the limestone is reduced, so that the consumption of the limestone and the coke is greatly reduced. Calcium carbide slag generated by a calcium carbide method PVC production device is ground and screened to obtain coarse powder, fine powder and superfine powder, the coarse powder, the fine powder and the superfine powder are mixed in proportion to obtain a calcium carbide slag powder mixture with reasonable grain size distribution, the mixture is used for preparing lime milk, lime milk meeting the ammonia distillation requirement of a sodium carbonate system can be prepared without adding quick lime, the lime milk is used for the ammonia distillation system, and the production cost is reduced. Lime milk notches caused by reduction of lime yield are supplemented, and meanwhile, the utilization value of the solid waste carbide slag is improved.

The application provides a heat comprehensive utilization system based on a lime kiln and a combustion beam, belongs to the technical field of calcining equipment, and comprises a beam body, a cooling oil circulation pipeline, a steam pipeline and a combustion air pipeline; the cooling oil circulation pipeline is in communication with an oil cooling cavity. A fan is arranged on the combustion air pipeline, the fan can make gas flow to form an air flow; the steam pipeline is in communication with a gas cooling cavity, a steam valve is arranged between the steam pipeline and the gas cooling cavity, the steam pipeline further has a tempering branch in communication with a hollow cavity, and a tempering valve is arranged on the tempering branch; the combustion air pipeline is in communication with the gas cooling cavity; a combustion valve is arranged between the combustion air pipeline and the gas cooling cavity, the combustion air pipeline further has a combustion branch in communication with the hollow cavity, and an air inlet valve is arranged on the combustion branch. The heat comprehensive utilization system based on the lime kiln and the combustion beam provided by the application realizes energy saving to the maximum by means of liquid and gas collaborative cooling.

The utility model discloses a lime kiln burner nozzle structure which comprises a connecting pipe, a nozzle body is arranged on the connecting pipe, a connecting port is arranged on the connecting pipe, the nozzle body is connected with the connecting port in an inserted mode, the nozzle body is connected with the connecting pipe through a flange, a sealing ring is arranged between the nozzle body and the connecting pipe, and the nozzle body is connected with the connecting pipe through a flange. A filtering assembly is arranged on the spray head body, a collecting box is arranged on the spray head body, and the filtering assembly and the collecting box are correspondingly arranged. By arranging the structures such as the filter plate and the like, the filter plate can effectively intercept solid particles in fuel or air and prevent the solid particles from entering the nozzle during use, so that the occurrence of nozzle blockage is reduced, the service life of the nozzle is prolonged, the maintenance frequency and cost are reduced, the cleanness of the fuel and the air is ensured, and the service life of the nozzle is prolonged. And mixing of fuel and air is optimized, combustion is more sufficient, fuel waste is reduced, and the operation cost is reduced.

The utility model discloses a device for preparing calcium carbonate and calcium sulfate from desulfurized fly ash through wet carbon sequestration. Comprising a lime kiln, a lime digestion and emulsification tank, a leaching tank, a first filtering unit, a second filtering unit, a third filtering unit, a fourth filtering unit, a purification reaction kettle, a carbonization and oxidation reaction kettle, a light calcium synthesis reaction kettle, a calcium carbonate synthesis reaction kettle, a common calcium carbonate drying unit, a calcium sulfate drying unit and an ammonia chloride solution buffer tank, the first recovery tank is used for collecting ammonia gas escaped from the leaching tank, the first filtering unit, the purification reaction kettle, the second filtering unit, the third filtering unit and the calcium sulfate synthesis reaction kettle and supplying the ammonia gas to the light calcium synthesis reaction kettle. The ammonia gas is used for adjusting the PH, so that carbon dioxide is dissolved in water to form carbonic acid, and carbonate reacts with calcium ions to form calcium carbonate. And the escaped ammonia gas is collected and reused. The ammonia gas utilization rate is improved. And the consumption of ammonia gas is reduced.

The device comprises a flash replacement kiln, the flash replacement kiln comprises a powder-fuel gas heat exchanger and an oxygen-powder bin, slag sludge is ground by a Reynolds mill after moisture is evaporated and falls into the oxygen-powder bin, oxygen powder and fuel gas in the kiln are mixed and then subjected to fuel gas combustion, powder vapor is heated to 550-650 DEG C and subjected to a replacement reaction, slaked lime powder is generated, and the slaked lime powder is discharged into the flash replacement kiln. And the powder-fuel gas heat exchange tube is frequently impacted to reduce the temperature to 80-90 DEG C, CO2-enriched gas flow enters the drying kiln and the CO2-enriched gas-oxygen heat exchanger to be cooled, and part of condensed water is separated out by the cyclone dehydrator and sprayed into the kiln. The particle size of the limestone powder is smaller than 200 meshes, the temperature of an upper inner cavity is 550-650 DEG C, and the steam supply coefficient is 1.03-1.05. The limestone slag sludge can be recycled. The method is low in investment, high in waste heat recovery rate, low in emission, free of burning reduction of products, long in service life and large in carbon capture potential, and the key management object lime kiln device of the national two-high project is prevented from being used.

The utility model belongs to the technical field of oxygen-enriched combustion, and particularly relates to a lime kiln oxygen-enriched combustion oxygen concentration adjusting device which comprises a gas mixing bin, an oxygen generator and an air blower. An oxygen conveying pipe and an air conveying pipe are arranged on the upper side and the lower side respectively, air inlet buckets are fixedly connected to the ends, close to the gas mixing bin, of the oxygen conveying pipe and the air conveying pipe, a plurality of arc-shaped blades are fixedly connected to the inner surfaces of the air inlet buckets, and the diffusion area of oxygen and air entering the gas mixing bin is increased; the oxygen concentration of the mixed air after stirring and mixing is more uniform, so that the oxygen concentration measurement is more accurate, and the oxygen concentration adjustment failure of the device is avoided.

The utility model discloses a denitration device for a lime shaft kiln, which structurally comprises a main body unit and a denitration unit, the main body unit comprises a tank body, a filter plate and a shunt pipe are arranged in the tank body, and a spray head is mounted on the shunt pipe; the supporting unit comprises a water storage tank and a medicament tank, a top cover is arranged on the water storage tank and the medicament tank, and a fixing frame is detachably connected to the top cover through bolts. When the device is used, flue gas enters the fixed box through the gas inlet, the temperature of the flue gas is sensed through the temperature sensor, and when the temperature of the flue gas is too high, cold water in the water storage tank is pumped out through the first water pump and conveyed into the snake-shaped copper pipe through the water conveying pipe, so that heat in the flue gas is taken away, and the flue gas is cooled; circulating cold water enters the water storage tank through the drainage pipe to circulate, the cooled flue gas is guided into the tank body to be filtered and denitrated, cooling is conducted in a cold water circulation heat exchange mode, heat in the flue gas can be rapidly absorbed, the temperature of the flue gas is reduced, and the situation that a filter screen is burnt or a spray head structure is damaged due to overheated flue gas is prevented.

The invention discloses an intelligent lime batching system, and relates to the technical field of refractory material processing. The intelligent lime batching system comprises a raw material bin, a raw material vibrating screen assembly is arranged on one side of the raw material bin, a raw material waste bin is arranged below the raw material vibrating screen assembly, a variable-frequency feeding belt conveyor is arranged at the bottom of the raw material waste bin, and a small raw material crusher is arranged at a discharging port of the variable-frequency feeding belt conveyor. A lime kiln is arranged on one side of the raw material vibrating screen assembly. By arranging the batching system and cooperating with components in the system, all recycling of by-products (raw material screen material, raw material dedusting ash, flue gas dedusting ash and finished product dedusting ash), zero emission of waste, uniform batching, 100% of finished product rate, effective utilization of all by-products, capability of meeting sintering process requirements by activity index, zero pollution to environment and low cost are realized. Each burdening link is realized in a closed space, and a finished product is pneumatically conveyed to be sintered.

The utility model discloses a lime waste heat recycling system which is characterized in that when the lime waste heat recycling system is used, high-temperature flue gas generated in the production process of a lime kiln enters a treatment box through a gas inlet pipe, and the flue gas directly enters a heat exchange device for heat exchange due to the fact that a large amount of dust is contained in the flue gas; the dust in the heat exchange device is too much to cause blockage, the flue gas cannot be directly discharged to cause atmospheric pollution, the flue gas enters the treatment box and is filtered by an internal filter plate, and the fixed plates on the two sides of the filter plate are knocked by a knocking component to cause blockage of the filter plate, so that the dust in the heat exchange device can be removed, and the dust in the heat exchange device can be removed. And a fixing plate drives a mounting plate to slide above a fixing rod, a spring is matched to enable a filter plate to shake so as to shake off dust above the filter plate, and treated flue gas enters a recycling pipe for waste heat recycling.

The utility model relates to kiln equipment technical field especially relates to a kind of double-chamber lime kiln with reinforced annular channel top, including lower kiln body, upper kiln body and plugging component, plugging component includes dense refractory castable, lightweight refractory castable and lightweight heat insulating material, two groups of lower kiln body are interconnected, the upper portion of lower kiln body is provided with upper kiln body, annular channel is arranged between upper kiln body outer wall and lower kiln body inside, the upper portion of annular channel is provided with dense refractory castable, the upper portion of dense refractory castable is provided with lightweight refractory castable, the upper portion of lightweight refractory castable is provided with lightweight heat insulating material, the part of lower kiln body and plugging component connection is annular channel outer wall, the part of upper kiln body and plugging component connection is annular channel inner wall;The utility model has reinforced annular channel, simultaneously uses the way of cast to build annular channel, prolongs the service life of lime kiln.

The application relates to the technical field of tail gas treatment, in particular to a method and system for carbon neutralization in lime kiln tail gas; the method comprises the following steps: obtaining liquid steel slag after a converter and lime kiln tail gas respectively; performing pressure swing adsorption on the lime kiln tail gas to obtain first CO2 gas; introducing the first CO2 gas into the first treated steel slag to perform an oxidation-reduction reaction, then performing second heat exchange and post-treatment to obtain second CO2 gas and CO gas respectively; returning the second CO2 gas to the blowing to realize carbon cycle; collecting and storing the CO gas to realize carbon neutralization; the system comprises a lime kiln tail gas collecting part, a steel slag reaction part, a gas treatment part and a control part; the utilization of CO2 in the lime kiln tail gas can improve the heat energy utilization rate of the steel slag.

The parallel flow heat accumulating type double-hearth lime kiln comprises a hearth kiln I and a hearth kiln II, preheating zones are arranged at the upper end of the hearth kiln I and the upper end of the hearth kiln II, calcining zones are arranged in the middle of the hearth kiln I and the middle of the hearth kiln II, cooling zones are arranged at the lower end of the hearth kiln I and the lower end of the hearth kiln II, and cooling zones are arranged at the lower end of the hearth kiln II. A connecting channel is arranged at the joint of the first hearth kiln and the second hearth kiln. According to the double-chamber lime kiln, the damaged arc-shaped shell can be detached through the detachable chamber kiln shell, maintenance or overhaul is convenient, in addition, the reinforcing plates, the reinforcing grooves and the reinforcing pipes are arranged on the outer surface of the arc-shaped shell, the compression resistance and impact resistance of the double-chamber lime kiln are improved, the service life of the double-chamber lime kiln is prolonged, and the service life of the double-chamber lime kiln is prolonged. By arranging the heat preservation and insulation blocks made of the aluminum silicate ceramic fiber materials and combining the refractory lining built by the refractory bricks, the heat preservation and insulation performance is good, heat loss is effectively reduced, energy is saved, and consumption is reduced.

The invention provides a lime kiln calcination control method and system, and relates to the technical field of lime kiln calcination, and the method comprises the following steps: obtaining fusion temperature data of a plurality of radial areas of a calcination zone; processing the fused temperature data and preset successful case data through a particle swarm optimization algorithm, and generating an expected temperature set value sequence of each radial partition of the calcining zone; and generating a fuel flow control parameter based on the expected temperature set value sequence and a preset physically guided neural network model. By adopting the technical scheme, the spatial temperature field distribution of the calcining zone of the lime kiln is controlled to a certain extent under complex production working conditions, and the technical effect of collaborative optimization of temperature uniformity, product quality and production energy efficiency is achieved.

The application discloses a material uniform distribution device of a lime calcining kiln and relates to the technical field of lime calcining equipment. The material uniform distribution device of the lime calcining kiln, in the device, the change of the incoming material quantity directly drives the adjustment of the inclination angle of the distribution plate, when the incoming material quantity is too large, the distribution plate increases the inclination range, speeds up the falling and spreading speed of the material, and avoids the accumulation of the local material in the kiln, when the incoming material quantity is too small, the distribution plate reduces the inclination range, slows down the falling speed of the material, and prevents the sparse distribution of the material, through the real-time linkage of the incoming material quantity and the distribution angle, the distribution plate can uniformly spread the material in the lime kiln, forms a material layer with consistent thickness and uniform distribution, and guarantees the uniformity of the calcining reaction from the source.

The application discloses a lime kiln tail gas carbon dioxide recovery and purification system and method based on membrane separation and multistage adsorption, and belongs to the field of industrial gas separation and recovery. The system comprises a pretreatment unit, a membrane separation system, an adsorption purification system, a deep cooling purification system, and a tail gas reflux system. The system and method of the application can increase the carbon dioxide concentration from 12% to 15% to 35% to 50% through membrane separation and pre-enrichment, realize efficient hydrocarbon removal and impurity removal and deep cooling rectification by adopting three-stage pressure swing adsorption combined with temperature swing adsorption, and realize the efficient recovery of carbon dioxide by combining tail gas reflux circulation and reprocessing, so that the carbon dioxide recovery rate can be significantly improved from less than 70% to more than 90%, the product purity can reach more than 99.5%, the energy consumption can be reduced, the service life of the adsorbent can be prolonged, and the system operation stability can be improved, thereby providing an efficient and feasible solution for industrial carbon emission reduction and resource utilization.

This invention provides a method for preparing low thermal conductivity magnesia-alumina spinel bricks for lime kilns, belonging to the field of finished lime kiln refractory bricks. The method uses magnesia and corundum powder in a mass ratio of 90:10 as the main materials, adding 1% Y₂O₃ sintering aid and 4% Mg(OH)₂-Al(OH)₃ sol binder. The mixture is then pressed, fired at high temperature, and cooled in the kiln. During firing, the sol decomposes to generate nano-MgO and Al₂O₃ particles, filling the grain boundary pores and forming a dense, low thermal conductivity magnesia-alumina spinel. Y₂O₃ effectively reduces the firing temperature. This brick is an alkaline, chromium-free material. When used in the combustion zone of a lime kiln, it exhibits excellent kiln lining adhesion and thermal shock stability, reducing kiln temperature by 30–50°C, achieving energy saving, consumption reduction, and extending kiln lining life.

The present application relates to a kind of lime kiln thermal efficiency monitoring system and method, the system includes: lime production acquisition module, the lime production of certain time period is counted, and the lime production data of this time period is obtained;Gas consumption total acquisition module, the total amount of gas consumption in certain time period is counted, and the total amount of gas consumption data of this time period is obtained;Insulation gas quantity acquisition module, the amount of gas consumption for the insulation of lime kiln in certain time period is counted, and the insulation gas quantity data of this time period is obtained;Coal powder consumption quantity acquisition module, the amount of coal powder consumption in certain time period is counted, and the coal powder consumption quantity data of this time period is obtained;Lime kiln thermal efficiency acquisition module, according to the lime production data, the total amount of gas consumption data, insulation gas quantity data, coal powder consumption quantity data of control module in certain time period are calculated to the thermal efficiency of lime kiln.

The invention discloses a lime kiln tail gas carbon dioxide recovery and purification system and method based on membrane separation and multi-stage adsorption, and belongs to the field of industrial gas separation and recovery, the system comprises a pretreatment unit, a membrane separation system, an adsorption purification system, a cryogenic purification system and a tail gas backflow system. According to the system and the method, the concentration of carbon dioxide is increased from 12%-15% to 35%-50% through membrane separation pre-enrichment, graded adsorption purification, efficient dealkylation and impurity removal and cryogenic rectification which are combined with three-section pressure swing adsorption and temperature swing adsorption are adopted, tail gas backflow circulation retreatment is combined, efficient recovery of carbon dioxide is achieved, and the system and the method are suitable for industrial production. According to the method, the recovery rate of carbon dioxide can be obviously increased to 90% or above from 70% or below, the product purity reaches 99.5% or above, meanwhile, energy consumption is reduced, the service life of an adsorbent is prolonged, the operation stability of a system is improved, and an efficient and feasible solution is provided for industrial carbon emission reduction and resource utilization.

This utility model provides an energy-saving device for flue gas circulation in a double-chamber lime kiln based on waste heat recovery, comprising a frame, a workbench, a main frame, an electrostatic precipitator, a heat exchanger, and a spray box. The workbench is mounted on the upper surface of the frame. The main frame is installed on top of the workbench and has an open structure. The electrostatic precipitator, heat exchanger, and spray box are sequentially installed inside the main frame, with the electrostatic precipitator and heat exchanger, and the heat exchanger and spray box, being independently connected in pairs via pipes. Through the electrostatic precipitator, the flue gas undergoes further purification, effectively removing fine particles and harmful substances. The electrostatic precipitator technology utilizes an electric field to charge the particles in the flue gas and adsorb them onto the collecting plates, thereby purifying the flue gas and effectively reducing environmental pollution.

The utility model belongs to the technical field of equidistant stretching of a filter plate of a filter press for lime kiln desulfurization sludge, and discloses an equidistant stretching device of a filter plate of a filter press for lime kiln desulfurization sludge, which is characterized in that a sliding body is fixedly arranged in the middle of the front and rear side surfaces of a frame type filter plate; the thrust plate is fixedly arranged on the upper portion of the right inner side face of the support. The fixed body is fixedly arranged in the middle of the front and rear side surfaces of the thrust plate; the filtered water discharge pipes are fixedly arranged on the front side and the rear side of the bottom of the frame type filter plate, and the filtered water discharge pipes are communicated with the interior of the frame type filter plate; the lifting equidistant stretching mechanisms are fixedly arranged on the front side and the rear side of the support respectively, and the lifting equidistant stretching mechanisms achieve one-time stretching action on the frame type filter plate through lifting action. The utility model has the beneficial effects that under the lifting matching of the lifting equidistant stretching mechanism, the frame type filter plate can be stretched at one time, so that sludge cakes formed by filtering can be discharged at one time, and the discharging operation efficiency of the sludge filter cakes is improved.

The invention relates to a lime kiln feeding system and a method for preventing accidents of a cableway of the lime kiln feeding system.The system is composed of a winch and a feeding mechanism, the feeding mechanism is composed of a cableway, a driving wheel, a first driven wheel, a second driven wheel, a balance weight, a track on which the cableway moves, and a steel wire rope for pulling the cableway; wherein a tensioning wheel is arranged between the first driven wheel and the driving wheel, and a tension sensor used for monitoring tension on the tensioning wheel in real time is installed on the tensioning wheel. According to the lime kiln feeding system and method, an alarm can be given in advance, and accidents are reduced.

The utility model discloses a discharged material cooling device of a lime kiln furnace, which comprises a closed box body, cooling components penetrating into the closed box body are arranged on two sides of the closed box body, and the cooling components are at least used for cooling lime discharged from the lime kiln furnace; the cooling assembly comprises a condensing box and a collecting box which are located on the two sides of the closed box body, a water feeding pipe is installed above the condensing box, a plurality of heat exchange pipes inserted into the closed box body are arranged on the upper portion of the water feeding pipe, a backflow pipe located on the other side of the closed box body is connected to the heat exchange pipes, and a plurality of one-way valves are installed on the backflow pipe. The cooling assembly is inserted into the closed box body from the outside of the closed box body, so that the heat exchange rate is improved, the cooling effect on lime products discharged from the kiln is enhanced, meanwhile, closed conveying operation on the lime products can be completed, and the good dustproof purpose is achieved.

The utility model relates to the technical field of lime kilns, in particular to a double-chamber lime kiln with good smoke discharge capacity, which comprises a lime kiln body, a gas pipeline, a smoke pipeline and an air pipeline, the gas inlet end of the gas pipeline is connected with the side wall of the lime kiln body, and the smoke pipeline connecting end of the smoke pipeline is connected with the side wall of the lime kiln body. The air inlet end of the air pipeline is connected with the side wall of the lime kiln body, the smoke pipeline connecting end is higher than the coal gas inlet end, and the air inlet end is lower than the coal gas inlet end. According to the utility model, through the position design of each pipeline on the lime kiln body, the gas inlet end is positioned above the air inlet end, so that the uniform mixing of gas and air is facilitated, the phenomenon of insufficient local combustion is reduced, better mixing of air and gas can be realized, and the combustion efficiency is improved; meanwhile, the flue gas pipeline connecting end is higher than the coal gas inlet end, so that flue gas can be smoothly discharged, and flue gas backflow is reduced.

This invention discloses a method for preparing basic magnesium carbonate from calcium carbide production purification ash, belonging to the field of solid waste resource utilization. The method mainly utilizes carbon dioxide from the lime kiln gas in calcium carbide production to pressurize and carbonize the purified ash, obtaining high-concentration heavy magnesium water. This heavy magnesium water is then catalytically degassed to obtain high-purity wet basic magnesium carbonate. Furthermore, the waste heat from the lime kiln gas in calcium carbide production is used to dry the wet basic magnesium carbonate, obtaining basic magnesium carbonate powder. This technical solution utilizes the lime kiln gas from calcium carbide production in a site-specific manner, effectively treating waste with waste, and avoiding the traditional chemical method of using chemical reagents to treat purified ash from calcium carbide production to obtain basic magnesium carbonate. Simultaneously, the catalytic degassed treatment technology significantly improves the preparation efficiency and recovery rate of basic magnesium carbonate, providing a new solution for calcium carbide production purification ash.

The utility model relates to the technical field of lime kiln cleaning equipment, in particular to a high-pressure blowing device for cleaning a lime kiln channel, which comprises a guide rail plate, an air storage tank, an air compressor and a display control screen. A driving motor for driving the screw rod to rotate is mounted on one mounting plate, a moving seat is in threaded connection with the screw rod, the moving seat is in sliding connection with the guide rail plate, a mounting frame is fixedly mounted on the moving seat, a rotating motor is fixedly mounted on the mounting frame, an output shaft of the rotating motor is in driving connection with a rotating plate, and an air outlet pipe is fixedly mounted on the rotating plate; a high-pressure nozzle is mounted at the output end of the air outlet pipe, the input end of the air outlet pipe is communicated with an air outlet of the air storage tank through a telescopic hose, an air outlet of the air compressor is communicated with an air inlet of the air storage tank, and an electromagnetic valve is mounted on the air outlet pipe; according to the utility model, an operator does not need to personally enter the kiln in danger and is far away from high-temperature burn, dust suction and other harms.

The invention discloses a lime kiln high-temperature flue gas recycling device, and belongs to the technical field of waste heat utilization, the lime kiln high-temperature flue gas recycling device comprises a water tank, support legs are fixedly connected below two sides of the water tank, a slag discharge pipe is fixedly communicated below the water tank, a heat conduction pipe is fixedly mounted in the water tank, and one end of the heat conduction pipe is fixedly communicated with an exhaust pipe; according to the flue gas treatment device, the filter assembly is arranged, flue gas can be conveniently filtered, and therefore the situation that impurities in the flue gas enter the heat conduction pipe and accumulate for a long time, and use of the heat conduction pipe is affected is prevented; a switch assembly is arranged, so that the water tank is convenient to open, the surface of the heat conduction pipe is convenient to clean, and the situation that due to long-time accumulation of water scale, use of the heat conduction pipe is affected is prevented.

The present application relates to lime kiln technical field, specifically disclose a kind of vacuum annular structure lime kiln, including feed section, still including preheating section, combustion section and cooling section, sequentially sealed and connected in the lower of feed section, the shape of preheating section, combustion section and cooling section are annular and are all arranged with concentric heat transfer wall one and heat transfer wall two inside, and the channel is formed between heat transfer wall one and heat transfer wall two;A kind of vacuum annular structure lime kiln of the present application, through the independent chamber design of annular channel and combustion chamber, flue gas chamber, realize indirect processing between whole process of limestone heating, preheating, cooling, limestone is always with fuel combustion flue gas, combustion air, cooling air and other media physical isolation, only flows in closed channel, avoids mixing dilution from source, without complex separation and purification equipment, can obtain high-purity carbon dioxide, reduce recovery cost while improving resource utilization efficiency.

The utility model relates to a distributing device of a smoke exhaust type lime shaft kiln, and belongs to the technical field of lime kiln equipment in the metallurgical industry. According to the technical scheme, a kiln shell (3) is of a cylindrical structure with the upper end closed, a round lime shaft kiln feeding port (2) is formed in the center, a chimney (1) is arranged on the periphery, a preheating zone, a calcining zone and a cooling zone are sequentially arranged in the kiln shell (3) from top to bottom, a material storage zone is arranged on the preheating zone, and a plurality of circles of vertically-arranged smoke exhaust pipes (6) are arranged in the material storage zone with the center of the kiln shell (3) as the circle center. The lower end of each circle of smoke exhaust pipe (6) is communicated with the preheating zone, a smoke exhaust material surface (9) is formed between the end surfaces of the lower ends of each circle of smoke exhaust pipe (6), the end surface of the upper end of each circle of smoke exhaust pipe (6) is higher than a limestone high material level material surface (7), the smoke exhaust pipes (6) are connected together through tie bars, and the smoke exhaust pipes (6) and the kiln shell (3) are connected together through tie bars. The utility model has the beneficial effects that the airflow distribution in the kiln is more uniform, and the product calcining quality is good.