778results about "Lime production" 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 discloses a double-kiln lime powder pneumatic conveying device, and relates to the technical field of double-kiln lime powder conveying devices.The double-kiln lime powder pneumatic conveying device comprises a main body mechanism, the main body mechanism comprises a draught fan, a first pipeline and a second pipeline, and the output end of the draught fan is fixedly communicated with the first pipeline; the first pipeline and the second pipeline are fixedly communicated through a flange, the surface of the first pipeline is fixedly sleeved with a first half box, the surface of the second pipeline is sleeved with a second half box, the first half box and the second half box are fixedly connected through bolts, and air leakage detection mechanisms are arranged on the surfaces of the first pipeline and the second pipeline. According to the double-kiln lime powder pneumatic conveying device, the whistle unit, the visual warning unit and the leaking stoppage unit are used in cooperation, the attention of maintenance personnel is attracted, the maintenance personnel can conveniently find the gas leakage condition in time, and therefore continuous loss and waste of pneumatic force are avoided, and the conveying efficiency of lime powder is improved.

The invention relates to the technical field of magnesite block light burning, and discloses an efficient and energy-saving magnesite block porous light burning annular kiln which comprises a vertical feeding cylinder, the vertical feeding cylinder is installed in the center area of the top of a kiln body, and smoke exhaust holes communicated with the outside space are formed in the circumferential face, close to the top of the kiln body, of the kiln body. An annular section composed of an inner side fire-resistant lining and an outer side fire-resistant lining is formed in the vertical feeding cylinder, and a plurality of annular array type internal combustion chambers are arranged in the kiln body and located in the annular section. The efficient and energy-saving magnesite block porous light burning annular kiln is a vertical circular kiln, magnesite with the particle size being 30-100 mm serves as raw materials, the cross section of the magnesite block porous light burning annular kiln is annular, a plurality of internal combustion chambers are arranged in a light burning zone, a plurality of coolers are arranged in a cooling zone, heat is evenly supplied to the internal combustion chambers, finished products are evenly cooled by the coolers, the light burning temperature of the materials is even, and the temperature of combustion-supporting air is high; the product quality is improved, and the fuel consumption is reduced.

The invention relates to the technical field of lime shaft kilns, in particular to a full-automatic Kawasaki rotating lime shaft kiln device, and aims to solve the problems that during combustion of an existing lime shaft kiln, due to the fact that flame heat is concentrated on a local part, a disordered and uniform temperature field cannot be formed, and the calcination temperature of limestone is not uniform; limestone processing is achieved through the combustion mechanism on the supporting seat, the soaking assembly in the thermal insulation shell guides materials and cooperates with the combustion assembly for preheating, a flame jet device of the combustion assembly jets flames, the flames act with heating gas blown out by the high-pressure air pump to form a uniform temperature field, and the material guiding plate guides the materials to enter the rotating processing part. And the processing component disperses the materials through the rotating and material uniformizing assembly, so that the limestone is uniformly heated, and the uniform effect during limestone calcination is improved.

The invention belongs to the technical field of intelligent measurement and control of kilns, and particularly relates to a kiln control system based on a lime sleeve kiln, which realizes space-time alignment of an airflow velocity vector field, a temperature gradient field and a dynamic material distribution field by constructing a three-dimensional dynamic grid topology of a countercurrent calcining zone in real time. The method comprises the following steps: accurately predicting a material migration path in a preset time window and an airflow critical speed required for realizing suspension under the condition of predicting evolution particle size at each path node, and quantifying the matching degree of the current opening degree of an axial air door group in a countercurrent calcining zone to the suspension efficiency of the material based on the actual airflow speed of the material and a critical value deviation; when it is judged that the matching degree does not reach the standard, an accurate air door regulation and control instruction is generated based on abnormal node space distribution, a servo mechanism is driven to execute and trigger closed-loop feedback, suspension requirement dynamic coupling of current and future short-time-sequence materials is achieved, a traditional lag regulation and control mode is broken through, and the calcination efficiency and the energy consumption control level of the lime sleeve kiln are remarkably improved.

A polymer-nanocellulose-lignin composite as disclosed comprises a polymer, nanocellulose, and lignin, wherein lignin forms a hydrophobic interface between the polymer and the nanocellulose. In some variations, a process is disclosed for producing a polymer-nanocellulose-lignin composite material, comprising: fractionating lignocellulosic biomass in the presence of an acid, a solvent for lignin, and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin, wherein lignin deposits onto fiber surfaces or into fiber pores; mechanically treating the cellulose-rich solids to form a hydrophobic nanocellulose material comprising cellulose fibrils and / or cellulose crystals; hydrolyzing the hemicellulose to generate fermentable hemicellulosic sugars; fermenting the fermentable hemicellulosic sugars to generate a monomer or monomer precursor; polymerizing the monomer to produce a polymer; and combining the polymer with the lignin-coated nanocellulose to generate a polymer-nanocellulose-lignin composite material for use in a wide variety of products.

The utility model discloses a sealing and isolating structure of a double-hearth kiln, which relates to the field of steel manufacturing equipment and is characterized in that a heat insulation plate, insulating bricks and refractory bricks are sequentially built from a steel structure to the center of a kiln hearth; fiberboards are built between the insulating bricks and the refractory bricks; the refractory bricks, the fiberboards and the heat insulation plates which are built are flush in height from bottom to top at intervals, the heat insulation bricks which are built are lower than the refractory bricks, the fiberboards and the heat insulation plates, a groove is formed, heavy castable is cast in the groove to form a pouring layer, and the pouring layer is made of a heat insulation material. One side of the casting layer is connected with the heat insulation plate, and the other side of the casting layer is connected with the fiber plate; compared with the prior art, the pouring layer is used for covering the heat preservation layer, heat preservation bricks of the heat preservation layer are effectively isolated, and high-temperature smoke is prevented from entering the heat preservation layer and burning loss of the heat preservation layer in a large area is avoided.

The utility model discloses a limestone milk grinding device, which relates to the technical field of limestone milk, and comprises a shell, the left part of the top end of the shell is fixedly connected with a feed hopper, the right part of the top end of the shell is fixedly connected with a water inlet pipe, and the bottom end of the shell is fixedly provided with a first electromagnetic valve; and the bottom end of the first electromagnetic valve is fixedly connected with a discharging pipe, and a grinding structure is fixedly installed in the middle of the top end of the shell. According to the limestone milk grinding device disclosed by the utility model, under the action of the grinding structure, the first motor is used for driving the transmission rod to rotate, so that the grinding roller and the brush roller are driven to rotate synchronously, and limestone milk raw materials are ground under the matching action of the grinding roller and the grinding disc; the ground limestone powder penetrates through the grinding disc and falls onto the surface of the filter screen, and in the process, the brush roller rotates to clean the surface of the grinding disc, so that the situation that part of particles block small holes in the surface of the grinding roller, and consequently discharging of the limestone powder is affected is avoided.

The utility model provides an anti-blocking rapping device for a limestone feed opening, which relates to the technical field of thermal power generation production and comprises a feed pipe, a feeder, a gate valve, a rapping mechanism, a shell, an air inlet port, an exhaust port, a rotating part, a clamping groove, a side plate, a fan blade, a striking component, a fixing rod, a top block and a flange. The outer surface of the fixing rod is provided with a spring, the spring is located between the ejector block and the shell, one side of the side plate is provided with a side rod, and the upper surface of the side rod is provided with a guide rod matched with the flange. The density of limestone slurry located below the discharging pipe meets the standard, SO2 absorption of an absorption tower is facilitated, normal production work is guaranteed, meanwhile, through the arranged sensing device, vibration can be started when it is detected that the discharging pipe is blocked, vibration can be stopped when the discharging pipe is not blocked, and therefore energy can be saved, and the use effect is good.

The invention relates to the technical field of rotary kiln processes, and provides a method for reducing nodulation in a lime rotary kiln, which comprises the following steps: S1, raw material pretreatment; s2, controlling the environment in the kiln; s3, optimizing the structural design of the kiln body; and S4, cleaning and maintaining in the kiln. According to the technical scheme, through the process steps of proportioning the raw materials, calculating the calcining temperature in a kiln, adjusting the stockline of a cooler to be 1.5 m, starting to discharge ash, and ending when the stockline of the cooler is 0.5 m, the CaO range of block ash is reduced by 11.44%, the SiO2 range is reduced by 1.52%, the activity range is reduced by 94.88 ml, the CaO range of surface ash is reduced by 6.95%, the SiO2 range is reduced by 0.54%, and the activity range is reduced by 100 ml; the data verifies that the quality of the finished product ash subjected to multi-fuel combustion in the rotary kiln is relatively stable after the new method is adopted.

The utility model relates to the technical field of grinding equipment, and discloses a grinding device for lime powder processing, which comprises a screening barrel, the bottom of the screening barrel is fixedly connected with a base, the top of the inner wall of the screening barrel is fixedly connected with a fixing ring, and the inner wall of the fixing ring is fixedly connected with a grinding cover. A material guide pipe is fixedly connected to the top of the grinding cover, a hopper is fixedly connected to the top of the material guide pipe, a backflow opening is formed in the left side of the hopper, a grinding block is arranged on the inner side of the grinding cover, and a first motor is fixedly connected to the lower side of the grinding block. The raw materials can be guided between the grinding cover and the grinding block through the hopper and the material guide pipe, uninterrupted grinding is carried out, the grinding efficiency is improved, the stirring rod and the brush plate are driven by the grinding block to rotate, the raw materials can be prevented from being blocked in the material guide pipe, unqualified lime powder can be screened out through the arranged backflow assembly, and the raw materials can be recycled. And backflow is carried out in time, and secondary grinding is carried out.

The utility model discloses a carbon-rich lime kiln production system which comprises a kiln body and a kiln cavity, the kiln cavity comprises a calcining chamber, a carbon cooling chamber, a water cooling chamber and an oxygen cooling chamber which are sequentially connected in series from top to bottom; a carbon dioxide injection mechanism is arranged at the lower part of the carbon cooling chamber; a water vapor injection mechanism is arranged at the lower part of the water cooling chamber; and an oxygen injection mechanism is arranged at the lower part of the oxygen cooling chamber. A single air or carbon dioxide cooling structure independently adopted by a traditional lime kiln cooling section is replaced with a multi-medium multi-stage cooling structure, CO2 enrichment is achieved, meanwhile, the lime cooling effect can be guaranteed and improved, and the quality of lime products is guaranteed; and the difficulty of capturing and recycling the carbon dioxide in the subsequent lime kiln flue gas can be greatly reduced. The device has the advantages of simple structure, easiness in operation, flexibility in adjustment, low investment cost and the like, and realizes effective compatibility of good carbon enrichment effect and good lime product quality.

The utility model relates to the technical field of double-chamber kilns, and in particular to a double-chamber kiln channel refractory brick anti-falling structure, including a floor and a wall, the surface of the floor is fixedly connected to the two ends of the wall, the outer wall of the wall is provided with fireproof bricks, the gap between the two fireproof bricks is matched, and the outer walls of the two fireproof bricks are fitted. The threaded column in the anti-falling structure is inserted into the interior of the sleeve, and then the staff turns the handle, the handle drives the threaded column to rotate, the threaded column is turned to the interior of the sleeve, the threaded column drives the disc to move, the disc and the connecting plate are tightly fitted together, the connection and the curved plate are fixed with the surface of the fireproof brick to prevent the fireproof brick from falling off, the wall and the fireproof brick form a double-chamber kiln channel. The anti-falling structure is set. When the refractory bricks inside the double-chamber kiln channel are prevented from falling off, the fireproof bricks are supported by the curved plate and the connecting plate, and the fireproof bricks will not be suspended in the air, thereby improving the use effect of the anti-falling structure.

The invention relates to the technical field of lime manufacturing, and provides a process and a system for manufacturing high-purity lime. The process comprises the steps of raw material pretreatment, plasma surface pretreatment, segmented atmosphere calcination, sound wave reinforced mass transfer, heat energy comprehensive utilization and intelligent control, rapid cooling, flue gas treatment and finished product packaging. The system comprises a raw material pretreatment unit, a plasma surface pretreatment unit, a multi-section gradient atmosphere calcining kiln, a sound wave reinforced mass transfer system, a heat energy comprehensive utilization and intelligent control system, a carbon dioxide capturing and recycling unit and a finished product cooling and packaging unit. Through raw material deep purification, surface activation treatment, gradient calcination and atmosphere accurate control, sound wave mass transfer reinforcement, intelligent optimization regulation and control, rapid cooling and flue gas purification and resource recovery, the purity and the reaction activity of a calcium oxide product are synergistically improved, and the production energy consumption and pollutant emission are remarkably reduced; and high-efficiency, clean and resource production of the high-purity lime is realized.

Equipment for crushing and grading magnesium oxide comprises a composite grading machine, a striking crushing and stripping machine, a spiral feeding machine, a circulating fan, a cyclone separator, a bag-type dust collector and an air compressor, and is characterized in that a crushing and grading unit is upgraded and grafted on the magnesium oxide crushing and grading equipment by utilizing the air flow advantage of closed-loop circulating air; on the basis of ensuring that the content of MgO is not reduced due to the influence of moisture and CO2 in air in the crushing and grading process, heavy MgCO3 fine powder and coarse MgO powder in raw powder are separated and graded to the maximum extent, and a low-grade magnesium oxide product containing a small amount of MgCO3 is obtained through an outlet of a 1 # air-lock valve of a composite grading machine; a high-grade magnesium oxide fine powder main product is obtained through an outlet of a second air-lock valve of the cyclone separator, and a high-grade magnesium oxide superfine powder product is obtained through an outlet of a third air-lock valve of the bag-type dust collector. By adopting a simple mode of coarse particle stripping shell shrinkage crushing instead of coarse particle grinding, the non-calcined magnesite powder is prevented from entering the fine powder, and the amount of the magnesium oxide fine powder is also increased. Operation is simple and easy to control, productivity efficiency is high, production is safe and environmentally friendly, and market application prospects are wide.

The present invention discloses an alkali-resistant castable for a lime rotary kiln working lining, as well as its preparation method and application. The present invention comprises the following raw materials in parts by mass: 100 parts premixed granular material; 50-55 parts premixed fine powder; and 9-13 parts potassium dihydrogen phosphate solution. The premixed granular material comprises magnesia aluminate spinel particles and calcium hexaaluminate particles; and the premixed fine powder comprises magnesia rhodonite fine powder, enstatite fine powder, zirconium boride fine powder, and amorphous Al2O3 fine powder. The alkali-resistant castable for the lime rotary kiln working lining prepared by the present invention has excellent construction performance. After being cast into the lime rotary kiln working lining, it does not require additional heat treatment or firing, thus saving energy. The castable has high high-temperature strength, low bulk density, low thermal conductivity, high alkalinity, strong resistance to alkali corrosion, and is non-ringing and slag-resistant. The castable has good fluidity, ensuring good overall sealing of the lime rotary kiln working lining. The alkali-resistant castable produces no toxic components before and after construction, making it environmentally friendly.

The utility model relates to a pulverized coal and coal gas co-combustion device for a Merz double-chamber lime kiln, and belongs to the technical field of lime calcination equipment in the metallurgical industry. According to the technical scheme, the device comprises a coal gas access pipe (1), a pulverized coal access pipe (2), a spray gun flange (3), a double-pipeline parallel combined spray gun pipe (4), a kiln shell (9) and an elbow (10), the coal gas access pipe (1) and the pulverized coal access pipe (2) are fixed to the kiln shell (9) through the spray gun flange (3), and the coal gas access pipe (1) and the pulverized coal access pipe (2) are transversely arranged up and down; the double-pipeline parallel combined spray gun pipe (4) consists of two pipelines which are vertically arranged in parallel, the upper ends of the two pipelines are respectively connected with the coal gas access pipe (1) and the pulverized coal access pipe (2) through an elbow (10), the lower ends of the two pipelines extend into a kiln to form a spray gun opening, and a cavity between the two pipelines is filled with a wear-resistant material. The pulverized coal and coal gas dual-fuel combustion device has the advantage that the purpose of pulverized coal and coal gas dual-fuel combustion is achieved.

The invention belongs to the technical field of lime shaft kilns, and particularly discloses a double-hearth type lime shaft kiln which is characterized in that a calcining zone is connected to the lower portion of a preheating zone, a cooling zone is connected to the lower portion of the calcining zone, a discharging barrel is connected to the lower portion of the cooling zone, a discharging frame is connected to the lower portion of the discharging barrel, and a discharging mechanism is arranged in the discharging barrel; an air locking mechanism is arranged in the discharging frame. The discharging mechanism is arranged, four discharging holes of a center plate are matched with a sealing plate, materials fall from the center to the periphery in a dispersed mode, material segregation caused by single-channel discharging is avoided, the air locking mechanism is tightly attached to a conical discharging groove through a sealing plate, and a movable plate and the sealing plate are in linkage sealing, so that the discharging efficiency is improved. The external cold air is effectively prevented from flowing backwards and hot air in the kiln is effectively prevented from leaking, zero-time-difference synchronous actions of blanking hole opening, air locking releasing, blanking hole closing and air locking starting are achieved through linkage control of the blanking mechanism and the air locking mechanism, and the air leakage problem caused by delay of a traditional control system is avoided.

The lime kiln lining structure comprises a kiln top lining and a kiln body lining, and the kiln body lining comprises a first refractory brick layer, a second refractory brick layer, a first heat insulation layer, a second heat insulation layer and a third heat insulation layer which are sequentially arranged from inside to outside. Contact surfaces between two adjacent bricks in the first refractory brick layer are in concave-convex fit and are in sealed connection; the strength of the kiln top lining is higher than that of the first refractory brick layer, the second refractory brick layer, the first heat insulation layer, the second heat insulation layer and the third heat insulation layer, and the kiln top lining extends downwards to form a reinforcing part; kiln protecting plates are arranged on the inner side face of the kiln top lining and the upper side surface of the side, away from the second refractory brick layer, of the first refractory brick layer. The stability of the lime kiln lining can be enhanced, and the service life of the lime kiln can be prolonged; meanwhile, the heat preservation performance of the lime kiln can be enhanced, and heat loss is reduced.

The invention relates to the technical field of sintering, and discloses an in-furnace high-permeability efficient sintering process which comprises the following steps: step 1, selecting raw ore; step 2, proportioning raw ore; 3, high-quality lime application; step 4, steam preheating; step 5, sintering process control; and 6, sintering is completed. In the first step, the proportion of small-particle-size raw ore in the proportion is increased to 20%, the compactness and uniformity of a sintered block are improved, combination is easier during sintering, and therefore the strength and stability of a final product are improved, in the second step, the average particle size is controlled to be 5 mm, the particle size smaller than 1 mm is smaller than 5%, and the particle size larger than 3 mm is larger than 65%. The method ensures good fluidity and effective reaction of the material in the sintering process, the moisture content is controlled to 6.8-8%, pulverization is reduced, the strength and stability of the sintered ore are improved, and the beneficial effects of improving the drum strength and metallurgical performance of the sintered ore and ensuring long-period stable and smooth operation of the blast furnace condition are achieved.

The invention provides a method for establishing a metallurgical lime burning reduction model and a method for establishing a calcium-magnesium-silicon content model in metallurgical lime, and further provides application of the method for establishing the models. The establishment method of the model provided by the invention comprises the following steps: preparing a series of standard samples of which the ignition loss and the content of each component have a proper gradient range, directly melting and flaking, weighing the mass of the molten flaking, and carrying out fitting regression on the loss amount of the sample before and after melting and a standard ignition loss value, so as to establish an ignition loss correction model; after dilution ratio correction is carried out on the measured value of each component, iterative regression calculation is carried out on the measured value and the burning loss, and a basic effect correction model caused by the burning loss is established; therefore, a model for rapidly determining the burning loss of the metallurgical lime and the contents of chemical components such as calcium oxide, magnesium oxide and silicon dioxide by using the fuse piece weighing correction-X-ray fluorescence spectrometry is established, and accurate determination of the burning loss of the metallurgical lime and the contents of the calcium oxide, the magnesium oxide and the silicon dioxide can be realized.

The invention provides a lime slaking machine which comprises a lime inlet, a water inlet, a barrel, a motor, a pushing shoveling plate and a fixing cover, the lime inlet and the water inlet are formed in the front end of the barrel, the motor, a rolling ring and a tug device are arranged on the outer side of the barrel, the pushing shoveling plate is arranged on the inner side of the barrel, the fixing cover is arranged at the rear end of the barrel, and the fixing cover comprises a circular rotary screen, a discharging port and a steam exhaust chimney. A steam exhaust chimney is arranged on the upper portion of the fixed cover, a discharging port is formed in the lower portion of the fixed cover, a circular rotary screen is arranged in the fixed cover and comprises an inner rotary screen body and an outer rotary screen body arranged outside the inner rotary screen body, and the outer rotary screen body comprises a first-stage rotary screen body close to the rear end of the barrel and a second-stage rotary screen body connected with the first-stage rotary screen body. Screen holes of the rotary screen are different in diameter, the outer hole diameter is larger than the inner hole diameter, blocking can be effectively prevented, the round rotary screen used by the lime slaking machine is of a two-layer three-level structure, lime milk good in dispersity can be extracted, grading treatment of solid particles is achieved, and the effect of saving energy is achieved while the raw material conversion rate is increased.

The screening equipment for high-purity magnesia production comprises a screening box, flow guide plates are fixedly connected to the tops of the two sides of the screening box, a grinding assembly is fixedly connected to the position, located below the flow guide plates, of an inner cavity of the screening box, and a screening assembly is fixedly connected to the position, located below the grinding assembly, of the inner cavity of the screening box. According to the high-purity magnesia grinding device, the grinding assembly is adopted for grinding high-purity magnesia, the grinding distance between the two grinding rollers can be adjusted through stretching out of a double-output-shaft hydraulic telescopic rod, and therefore the grinding fineness can be adjusted, after the ground high-purity magnesia enters an inner cavity of a screen, a cam can be driven to rotate by starting a second motor, and the grinding precision is improved. The screening function is achieved, the multi-stage screening effect can be achieved by arranging the three layers of filter sieves, so that the purification accuracy can be guaranteed, and after screening is completed, materials left after screening of each layer can be rapidly discharged by inclining the screen cloth.

The utility model discloses limestone crushing equipment with a dust falling mechanism, which comprises a crushing equipment main body, a dust falling assembly and an anti-blocking assembly, the bottom of the dust falling assembly is fixedly mounted with the top of a bearing plate, the anti-blocking assembly is arranged outside the dust falling assembly, and the anti-blocking assembly comprises a cover box plate, a fixed block, an electric telescopic rod and a connecting block. The bottom of the cover box plate and the top of the bearing plate are movably installed, the inner surface of the cover box plate and the side end of the dust falling box are movably installed, the bottom of the fixing block and the top of the bearing plate are fixedly installed, one end of the electric telescopic rod and the side face of the fixing block are fixedly installed, and the other end of the electric telescopic rod and the side face of the connecting block are fixedly installed. The side end of the connecting block is fixedly mounted on the outer surface of the cover box plate; by arranging the anti-blocking assembly, the air cylinder is controlled to push the installed push plate to move from one side to the other side, so that dust falls into the collecting box to be collected, and the situation that the filtering efficiency is reduced or filtering cannot be continued due to the fact that the filter screen is blocked is avoided.

The utility model relates to the technical field of double-chamber lime kilns, in particular to a constant-calorific-value double-chamber lime kiln. According to the technical scheme, the double-hearth lime kiln comprises a bearing base, a double-hearth lime kiln body, a feeding pipe and a heat exchange coil pipe, wherein a pump body and a gas filtering box are mounted on the top end face of the bearing base; a double-chamber lime kiln body is mounted on the top end face of the bearing base through a mounting frame, and a communicating pipe is arranged on the double-chamber lime kiln body. A feeding pipe is arranged on the top end face of the double-chamber lime kiln body, and a discharging pipe is arranged on the bottom end face of the double-chamber lime kiln body. A hopper is fixedly embedded in the top end face of the feeding pipe. A combustion-supporting gas pipe is fixedly embedded into the side end surface of the double-chamber lime kiln body; a heat exchange coil pipe is mounted on the discharging pipe in an attached manner; a connecting pipe is embedded and fixed on the heat exchange coil pipe; an exhaust pipe and a first air inlet pipe are arranged on the pump body. The double-chamber lime kiln can be used, and direct heat exchange in the double-chamber lime kiln is avoided during combustion supporting.

The invention provides a low-nitrogen combustion decomposing furnace and a lime calcining system, and belongs to the technical field of limestone calcining, specifically, the low-nitrogen combustion decomposing furnace comprises a decomposing furnace body used for calcining and decomposing limestone, and a furnace chamber of the decomposing furnace body is divided into a material collecting area, a hot carbon reduction area and a combustion decomposing area; materials, combustion-supporting gas and fuel enter the decomposing furnace body in two ways, and the proportion of the materials, the combustion-supporting gas and the fuel entering the decomposing furnace body in the two ways is controlled, so that a hot carbon reduction area and a combustion decomposing area are formed in a furnace cavity of the decomposing furnace body. For example, the proportion of combustion-supporting gas in the combustion decomposition area is more, so that materials can be fully combusted, while the proportion of the combustion-supporting gas in the hot carbon reduction area can be reduced, so that insufficient combustion is carried out in the area, and meanwhile, suppression and reduction are carried out through fuel, so that nitrogen oxide passing through the area is subjected to reduction reaction to become carbon dioxide and nitrogen to be discharged; the content of nitrogen oxide is greatly reduced, and the nitrogen oxide treatment procedure of the subsequent exhaust process is reduced.

The utility model relates to the technical field of limestone powder iron removal, and discloses an iron removal device for desulfurized limestone powder production and processing, which comprises a first conveying seat, rotating shafts are rotatably mounted on two sides of the first conveying seat, and driving rollers are fixedly mounted on two sides of the two groups of rotating shafts. According to the limestone powder conveying device, the transmission belt on the outer side of the transmission roller is driven for transmission, limestone powder in the first conveying base can be continuously conveyed on the transmission belt, and iron powder contained in the limestone powder can be adsorbed and attached to the transmission belt in cooperation with the magnetic plate installed in the first conveying base; after the iron powder on the transmission belt is separated from the magnetic plate, the iron powder can be automatically separated and removed, meanwhile, limestone powder can be guided into the second conveying seat before being guided into the first conveying seat, and the driving motor drives the flattening roller and the second transmission belt to rotate reversely, so that the quantity of the limestone powder guided into the first conveying seat can be well controlled; limestone powder is uniformly paved on the surface of the transmission belt.

The invention discloses a simple and practical slide sieve, and relates to the technical field of refractory material manufacturing. The simple and practical slide sieve comprises a slide carriage shell, a sieving assembly is arranged in the slide carriage shell, an overhauling assembly is arranged on one side of the slide carriage shell, the sieving assembly comprises a sieve arranged in the slide carriage shell, and lifting lugs are fixedly installed on the two sides of the sieve. The screening problem is solved by the self-gravity of the arranged screening assembly in the using process, only the low-power bin wall vibrator is periodically used for vibration, the cost is remarkably saved, the size is small, the weight is light, installation and maintenance are convenient, the structure is simple, multiple inspection holes are formed in the top of the slide sieve, the sieve net is convenient to overhaul and replace, and sampling and testing are convenient; the vibrating screen device replaces traditional vibrating screen equipment, is obvious in using effect especially in occasions for treating and screening lime or making sand and other fine powder materials, meanwhile, is small in installation space occupied area and light in weight, and can still achieve the screening function under the condition that the space layout is compact.

The utility model discloses an efficient limestone powder conveying mechanism which comprises a conveying outer box. The side surface of the extension plate is fixedly connected with the front and back surfaces of the transportation outer box; the side surface of the hinge is fixedly connected with the side surface of the extension plate; the side face of the bottom end of the inclined supporting plate is fixedly connected with the side face of the hinge. According to the scheme, by arranging related structures of the extension plate, the hinge, the inclined supporting plate, the baffle and the sealing gaskets, before limestone powder is poured, the inclined supporting plate is lifted to the maximum angle, the top of the outer conveying box abuts against the middle of the side face of the inclined supporting plate, then the sealing gaskets on the two sides can be attached to each other, and then the conveying belt box is opened to start conveying; when the limestone powder is conveyed, corresponding mechanisms are used for shielding and protection, impurities and particles of other components are not prone to falling on the conveying belt in the external environment, the impurities can be prevented from being doped in the limestone powder, and therefore the subsequent quality of the limestone powder can be guaranteed when the limestone powder is used.

The present invention discloses a method for constructing a refractory material structure of a lining support pillar of a double-chamber kiln, including constructing a refractory material structure of a lining support pillar of a double-chamber kiln; the construction process includes: for the odd layers in the ring brick layer, a heat-insulating brick close to the casting material around the pillar is horizontally longitudinally constructed and the side is close to the steel shell for construction, and a refractory brick is horizontally longitudinally constructed on the side of this heat-insulating brick facing the furnace interior, and a part of this refractory brick is longitudinally inserted into the position of the casting material; for the even layers in the ring brick layer and the upper and lower layers of the pillar, a heat-insulating brick on an outer C-lining adjacent to the inner C-lining is horizontally longitudinally constructed and the side is close to the steel shell for construction, and a refractory brick is horizontally longitudinally constructed on the side of this heat-insulating brick facing the furnace interior, and the end faces of this heat-insulating brick and this refractory brick are flush for construction and both are partially inserted into the connection between the inner C-lining and the outer C-lining. The present invention can solve the problem that the pillars and refractory materials of the double-chamber kiln are prone to cracking to generate straight seams and damage the furnace wall.