348results about "Preheating charges" patented technology

The invention discloses a coal gangue distributed homogeneous high-temperature activation calcination method and system, and relates to the technical field of resources and environments, the system comprises a coal gangue powder preparation and feeding system, a coal gangue powder distributed homogeneous high-temperature activation calcination system, a high-temperature powder cooling system, a finished product collection system and a flue gas purification system; the coal gangue powder distributed homogeneous high-temperature activation calcining system comprises a primary cyclone preheating system and a distributed homogeneous high-temperature activation furnace; the air inlet end of the primary cyclone preheating system is communicated with the coal gangue powder preparing and feeding system, the primary cyclone preheating system is communicated with the homogeneous high-temperature activation furnace, materials in the distributed homogeneous high-temperature activation furnace are separated by the gas-solid cyclone separator and then are divided into two parts by the distributor, one part enters the high-temperature powder cooling system, and the other part enters the high-temperature powder cooling system; and the other part returns to the distributed homogeneous high-temperature activation furnace for circulation. According to the method, large-scale treatment of high-temperature activation and calcination of the coal gangue is realized, and the uniformity and controllability of product quality are remarkably improved.

The utility model provides a charging waste heat platform for secondary aluminum production, and relates to the field of secondary aluminum production. The charging waste heat platform for secondary aluminum production comprises a platform body and supporting legs installed at the bottom of the platform body, the charging waste heat platform body comprises a fixed platform body, a fixed cover and a fixed shell, a feeding device used for smashing aluminum raw materials is installed on the fixed shell, and a conveying mechanism is installed in the fixed cover and the fixed shell. Feeding holes are formed in an outer cylinder and a fixed shell of the conveying mechanism; according to the feeding waste heat platform for secondary aluminum production, flue gas is wrapped by the fixing cover and can flow in the specific direction, the heat loss amount in the preheating process is reduced, energy is saved, aluminum raw materials are crushed through the two crushing cutters, the contact area of the aluminum raw materials and air is increased, the subsequent preheating effect is improved, and the service life of the aluminum raw materials is prolonged. And the conveying mechanism can intermittently supply materials and is matched with the inner cylinder and the outer cylinder to rotate, so that the aluminum raw materials continuously roll, the retention time and the heated contact area are increased, and the preheating effect is improved.

The invention discloses an environment-friendly metal combined smelting furnace, relates to the field of metal smelting equipment, and aims to solve the problems of low efficiency, heat energy waste, waste gas pollution, inconvenience in operation and the like of a traditional smelting furnace. The environment-friendly metal combined smelting furnace comprises a smelting furnace support, a rotatable high-temperature smelting furnace is arranged on the support, and a liftable metal preheating furnace is arranged above the support; a smelting crucible and a combustor are arranged in the high-temperature smelting furnace, and a multi-layer heat insulation structure is arranged on the outer side; a preheating box is arranged in the metal preheating furnace, forms an exhaust cavity with the furnace wall, and is butted with the high-temperature smelting furnace through a waste gas guide pipe to realize secondary combustion of waste gas; according to the equipment, waste heat recovery and waste gas harmless treatment are achieved, the energy utilization rate and the environmental protection property are improved, operation is convenient and fast, and the equipment is suitable for smelting of various kinds of metal.

The invention belongs to the technical field of cement production line transformation, and discloses a method for transforming a cement clinker production line into a coal gangue suspension calcination production line, the cement clinker production line comprises five stages of double-series preheaters and a decomposing furnace, the five stages of double-series preheaters are divided into A-row preheaters and B-row preheaters, a preheater in the column A is transformed into a preheating device of the coal gangue powder suspension calcination production line, a preheater in the column B is transformed into a gas-solid separation cyclone and a cooling device of the coal gangue powder suspension calcination production line, and a pipeline furnace is arranged between an air outlet of a decomposing furnace and an air inlet of the gas-solid separation cyclone. A decomposing furnace and a pipeline furnace are jointly transformed into a coal gangue suspension calcining furnace. According to the method, an obsolete cement clinker production line is transformed into a coal gangue suspension calcining production line with the working procedures of coal gangue grinding, conveying, metering, preheating, calcining, cooling and the like.

The utility model discloses a slurry preheating device for ferrite material production, which relates to the technical field of ferrite material production and comprises a base, a preheating box is fixedly mounted at the top of the base, a feed port is fixedly connected to the right side of the top of the preheating box, and a discharge port is fixedly connected to the bottom end of the left side of the preheating box. And plugging plates are movably inserted into the feeding opening and the discharging opening correspondingly, a screening unit is arranged in the preheating box and comprises sliding grooves formed in the top ends of the inner walls of the front side and the rear side of the preheating box, and filter sieves are movably inserted into the sliding grooves. The bidirectional motor is arranged, the top output end of the bidirectional motor is used for driving the driving rod to rotate, the driving rod drives the rotating plate to promote the brake rod to rotate along with the driving rod, the brake rod drives the brake sleeve to promote the reciprocating rod to reciprocate left and right, and the reciprocating rod drives the rolling wheel to roll at the top of the filter sieve to roll and crush agglomerates. The slurry production quality is promoted.

The invention discloses a process and system for preparing an auxiliary cementing material by calcining granular coal gangue coupled with a cement clinker sintering system, and the process comprises the following steps: treating large undisturbed coal gangue to obtain granular coal gangue, and quantitatively analyzing minerals in the granular coal gangue; feeding the granular coal gangue raw material into an activating calcining kiln for activating and calcining; then feeding into a grate cooler for cooling to obtain calcined activated coal gangue; wherein an activation calcination heat source comes from high-temperature section hot air of a grate cooler and hot air at an outlet of a C4 preheater, the proportion of the high-temperature section hot air, the hot air at the outlet of the C4 preheater and combustion-supporting air is controlled, and temperature and oxygen concentration adjustment at the activation calcination stage is achieved. According to the invention, the system for preparing the auxiliary cementing material by calcining the coal gangue is coupled with the original cement clinker sintering system, so that the on-line doping of the auxiliary cementing material in the cement clinker is realized, and meanwhile, the carbon emission is reduced.

An adjustable high-temperature steam directional permeation device for a sintering round roller stock bin comprises a directional permeation spray gun system which comprises an adjustable spray gun; one end of the adjustable spray gun is located in the round roller stock bin, and the acting force of materials in the round roller stock bin on the adjustable spray gun at least comprises a component which is in the axial direction of the adjustable spray gun and points to the inner side of the round roller stock bin; the other end of the adjustable spray gun is located outside the round roller stock bin and used for being connected with a steam source. According to the device, the adjustable spray gun is inserted into the round roller bin to conduct steam injection on materials, steam directly reaches a core area of a material layer, steam heat is almost completely absorbed by the materials, heat energy loss is low, and the temperature of the materials is greatly increased; the material is heated by steam from the inner layer of the material, and the thickness of an over-wet layer is obviously reduced because the steam is uniformly dispersed. The spray gun device solves the problem that in the prior art, a spray gun device in a round roller stock bin is poor in preheating effect.

The invention provides an aluminum material purification refining furnace for non-ferrous metal remanufacturing, and belongs to the technical field of aluminum melting equipment, the aluminum material purification refining furnace comprises a furnace shell and a heat insulation bottom plate, an aluminum melting unit and a heat insulation layer are installed on the heat insulation bottom plate, and the heat insulation layer is arranged on the outer side of the aluminum melting unit in a sleeving mode. Wherein a heat insulation gap is formed between the aluminum melting unit and the heat insulation layer, an annular bracket is installed in the heat insulation gap, and a traction unit is installed on the furnace shell. The heat insulation gap is formed between the aluminum melting unit and the heat insulation layer, aluminum raw materials are put into the heat insulation gap, waste heat dissipated outwards by the aluminum melting unit is used for drying the aluminum raw materials, the aluminum raw materials are preheated, energy consumption is reduced, meanwhile, the aluminum raw materials can be gradually lifted to the top of the heat insulation gap through the lifting annular bracket, and the heat insulation effect is improved. And when the aluminum raw materials do not need to be added, the aluminum raw materials are always in a dry heat preservation state in the heat insulation gaps, and the situation that the surfaces of the aluminum raw materials adsorb moisture again due to the fact that the transferring time is too long is avoided.

The invention discloses a roasting system for leaching and lithium extraction of salt lake deposited clay type lithium ores, and belongs to the technical field of salt lake resource development and lithium extraction, the roasting system comprises a rack, the rack is provided with a preheating mechanism, a rotary driving mechanism and a roasting box, the preheating mechanism is used for preheating the leached salt lake deposited clay type lithium ores, and the rotary driving mechanism is used for driving the roasting box to rotate; the preheating mechanism is composed of a charging barrel, a lower conical barrel, a communicating pipe and a preheating box, a first rotating guide ring is arranged at the lower end of the charging barrel, and a first guide ring cavity is formed in an upper cavity opening of the lower conical barrel; the lower conical barrel adopts a rotating mode, and a matching structure of a first rotating guide ring at the lower end of the matched charging barrel and a first guide ring cavity at an upper cavity opening of the lower conical barrel is adopted, so that continuous circumferential shearing force and radial pushing force can be generated on the lithium ore which is high in viscosity and easy to cake after leaching, and the lithium ore is turned over along the inner wall of the conical barrel through rotation; local accumulation dead angles are avoided, and the problem that materials are bonded and blocked in a traditional fixing structure is solved.

A powdered limestone suspension calcination system with waste gas treatment function belongs to the fields of limestone resource processing technology and industrial waste gas treatment. It includes a feeding unit, a calcination unit, a cooling unit, a product bin, and a tail gas treatment unit. The discharge end of the feeding unit is connected to the feed end of the calcination unit, the discharge end of the calcination unit is connected to the feed end of the cooling unit, and the discharge end of the cooling unit is connected to the product bin. The air inlet of the feeding unit is connected to the air outlet of the calcination unit, the air outlet of the feeding unit is connected to the air inlet of the tail gas treatment unit, and the air outlet of the cooling unit is connected to the air inlet of the tail gas treatment unit. The system provided by this invention can realize the calcination of limestone of all particle sizes, introduces a heat recovery system and a waste gas treatment system, reducing energy consumption and production costs; after dust removal, cooling, and treatment, the waste gas has reduced environmental impact and meets the requirements of sustainable development.

The utility model discloses a novel efficient heat exchange low-pressure-loss preheater which achieves the technical effects of reducing system resistance, improving separation efficiency and reducing C1 outlet temperature by increasing the height of a volute in a gradient mode, prolonging the length of an inner barrel in a proportion mode, optimizing the structure of an air inlet pipe and improving a material scattering device. The method is particularly suitable for energy-saving transformation of a 5000t / d cement clinker production line, and has the characteristics of low investment, quick effect, lasting effect and the like.

The invention aims to provide a sintering ring cold waste gas zero emission treatment system and method, and relates to the technical field of waste gas emission in the steel industry. The system comprises a circular cooler, a waste heat boiler and a blast furnace ore tank, a waste gas outlet of the cooling section generating high-temperature waste gas is connected with a waste gas inlet of the waste heat boiler, and a waste gas outlet of the waste heat boiler is connected with air boxes below trolleys of the cooling sections generating the high-temperature waste gas, so that the high-temperature waste gas enters the waste heat boiler to be subjected to waste heat recovery and then enters the cooling sections again to be recycled. The cooling section for generating the medium and low temperature waste gas is connected with the blast furnace ore tank, and the medium and low temperature waste gas is introduced into the blast furnace ore tank to supply heat to the blast furnace ore tank. According to the sintering ring cooler waste gas zero emission system, cross-process resource collaboration is achieved, meanwhile, waste gas is completely consumed, the purpose of sintering ring cooler waste gas zero emission is achieved, other large equipment is not added, and the sintering ring cooler waste gas zero emission system has the advantages of being simple in structure and low in maintenance cost.

The utility model belongs to the field of positioning devices, and particularly relates to an internal positioning device of a pre-forging preheating furnace, which comprises a preheating furnace, two guide rails are fixedly connected in the preheating furnace, guide seats are slidably connected to the two guide rails, positioning seats are fixedly connected to the tops of the guide seats, and the positioning seats are slidably connected in the preheating furnace. A positioning pin is slidably connected to the bottom of the positioning seat and penetrates through the positioning seat, a pull rod is slidably connected to the interior of the positioning seat and penetrates through the positioning seat, and a slope block is fixedly connected to one end of the pull rod. According to the utility model, the locking seat is arranged in the preheating furnace and below the positioning seat, and then the positioning pin which stretches out and draws back by the spring is arranged in the positioning seat, and the positioning pin can be inserted into the locking seat under the action of the spring, so that the positioning seat has a locking function after entering the position in the preheating furnace, and the situation that the position of a workpiece is too random is prevented; and the heating uniformity is ensured.

The utility model discloses a novel sinter mixture bunker steam preheating device, which belongs to the technical field of sinter mixture bunker steam preheating, and comprises a boiler steam distribution drum, a heat preservation pipe is arranged at the top of the boiler steam distribution drum, an efficient steam-water separator is arranged at one end of the heat preservation pipe, a control valve is arranged in the efficient steam-water separator, and the control valve is connected with the steam distribution drum. A support frame is arranged at the bottom end of the efficient steam-water separator; according to the utility model, the thermal insulation pipe is arranged, the thermal insulation cotton and the thermal insulation pipe are used for protection through the design, so that the temperature loss of steam in the steam pipe is avoided, and then the heated sintering mixture ore tank is arranged on one side closer to the ignition furnace, so that the mixture can immediately enter the ignition furnace for ignition after being heated, and the heat loss in the conveying process is reduced; the air permeability of a material layer is improved, the thickness of a sintered material layer is increased, and the yield and quality of sintered ore are greatly improved.

The present application relates to the technical field of energy storage, and relates to an energy storage system based on thermochemical energy storage and Rankine cycle and an operation method. The energy storage system comprises a storage device, an energy storage device, an energy release device and a power generation device. The energy storage device comprises a calcium carbonate rotary calcining kiln, a first heat exchanger network and an electric heater, and the structural components are sequentially connected. The electric heater is used to convert excess electricity into heat energy, the calcium carbonate decomposition reaction is carried out in the calcium carbonate rotary calcining kiln, the heat energy is converted into chemical energy stored in calcium oxide, the energy release device is used to convert the chemical energy stored in calcium oxide into heat energy, the heat energy is converted into electricity by the power generation device, and the electricity demand of the terminal user is met. The energy storage system provided by the present application can realize the conversion, transmission and storage of different energies, has high energy conversion efficiency, can effectively reduce the coal consumption in the energy conversion process, and meets the energy saving and carbon reduction and flexibility reconstruction requirements of coal-fired power plants.

This application relates to the field of roasting waste heat utilization technology, specifically disclosing an apparatus and method for recycling the heat energy of lithium ore roasting. The apparatus includes a preheating cylinder with heat-conducting plates installed on its inner wall to receive waste heat from the lithium ore roasting process. A lithium ore storage mechanism is installed within the preheating cylinder, comprising: a first storage component including a tumbling assembly and a first vibrating screening assembly, wherein the tumbling assembly flips large-sized lithium ore for rapid preheating; a second storage component including a second vibrating screening assembly, wherein the second vibrating screening assembly flips medium-sized lithium ore for rapid preheating; and a third storage component for receiving small-sized lithium ore falling from the second storage component. The lithium ore storage mechanism stores lithium ore in layers according to its size and performs targeted treatment on each layer to improve the efficiency of waste heat absorption, thereby improving preheating efficiency.

This utility model discloses an expanded perlite preheating device, including an expansion furnace, a heat exchange cylinder, a storage tank, and a transfer silo. A feed hopper is located at the bottom of the expansion furnace, and a mixing and conveying pipe is located at the top of the expansion furnace. The mixing and conveying pipe passes through the heat exchange cylinder, which has a heat exchange channel with an inlet and an outlet. The heat exchange channel is not connected to the inner cavity of the heat exchange cylinder. The outlet of the storage tank is connected to the inlet of the heat exchange channel, and the outlet of the heat exchange channel is connected to the inlet of the transfer silo via a pipe. The outlet of the transfer silo adds material to the feed hopper via a pipe. The beneficial effects of this utility model are: the heat exchange channel within the heat exchange cylinder allows the perlite powder to exchange heat with the waste heat of the flue gas, thus preheating the perlite powder before it enters the expansion furnace, reducing energy consumption and improving the utilization rate of waste heat from the flue gas.

The invention discloses an external material returning large-scale steam calcining furnace for trona production, and relates to the technical field of steam calcining furnaces for trona production. Comprising an obliquely-installed furnace body with the high end being a furnace head and the low end being a furnace tail. The furnace head end is connected with a feeding device with mixing and preheating functions, and the furnace tail is provided with a discharging cover. The steam calcining furnace is supported by front and rear two-gear supporting devices, and a transmission device is arranged between the two-gear supporting devices and close to a rear supporting position. Steam heat exchange pipes are concentrically arranged in the machine body and connected with a furnace tail steam chamber, and the steam chamber is connected with a furnace tail air inlet box assembly. According to the feeding device of the steam calcining furnace, the functions of feeding, premixing, preheating and the like are integrated, an external premixer of a traditional external material returning calcining furnace is omitted, space and investment are saved, and steam is fully utilized for preheating.

The application provides a lime rotary kiln preheater push head material return recovery device and relates to the technical field of lime calcination. The device comprises a preheater main body, a plurality of push heads are respectively arranged in a plurality of through channels formed in the preheater main body, one end of the through channel is connected with the outside world, and the other end is connected with a vertical feeding channel of the preheater main body; a layered space is formed between the upper part of the through channel and the upper part of the push head, two baffle structures are respectively connected with the two ends of the through channel, the distance between the bottom of each baffle structure and the upper part of the push head is less than 1.5 mm, a plurality of balls are arranged in the layered space, the push head is hollow, a plurality of through holes with a diameter less than 1.5 mm are arranged on the upper surface of the hollow part of the push head, the through holes are connected with the inside of the push head and the layered space, and the hollow space of the push head is connected with an external material collecting bin through a material guide pipe. The application can avoid the powder from sliding from the gap between the preheater main body and the push head, thereby reducing the waste of raw materials.

The invention relates to the technical field of shift catalyst presulfurization, in particular to a thermal coupling circulating sulfurization device and a thermal coupling circulating sulfurization process, the device comprises a preheating assembly used for introducing a mixed gas of N2 and H2S gas with a set concentration; the preheating assembly comprises a heater and a heat exchanger which are connected in sequence, and the heater and the heat exchanger respectively raise the temperature of the mixed gas to t1, t2 and t1lt; t2; the heating assembly is connected with the preheating assembly and used for receiving the mixed gas preheated by the preheating assembly and heating the mixed gas to t3 and t3gt; t2; the pre-vulcanization tower is connected with the heat exchanger; an outlet of the pre-vulcanization tower is communicated with the heat exchanger and is used for discharging high-temperature mixed gas after reaction into the preheating assembly to serve as a heat exchange heat source; the heat exchanger is further connected with the heater through a cooling circulation assembly so as to recycle N2 and H2S; according to the invention, the vulcanization and activity of the catalyst can be improved, the carbon deposition of the catalyst and the out-of-control reaction caused by too high temperature can be avoided, the driving process is simplified, and the production efficiency is improved.

The present invention relates to the technical field of cement production and in particular to a calcination system and a calcination process for low-carbon cement clinker. The calcination system comprises: a kaolin calcination assembly comprising a preheater and a decomposition furnace; wherein the preheater is provided with a multi-stage cyclone; wherein the preheater is provided with an inlet and an outlet; wherein the decomposition furnace is provided with a fuel inlet and a raw material inlet; wherein the raw material inlet is connected to the outlet; wherein the decomposition furnace calcines to produce activated kaolin; wherein the calcination temperature in the decomposition furnace is between 700°C and 850°C, the calcination time is between 0 and 1.5 hours, and the calcination atmosphere in the decomposition furnace is an oxygen-rich atmosphere or a CO reduction atmosphere.and a cement calcining unit configured for calcination to produce cement clinker; wherein the activated kaolin is added to the outlet side of the cement calcining unit in a predetermined proportion of the activated kaolin in the cement clinker. It can reduce the use of carbon-containing feedstocks in clinker production, decrease the carbon emissions of the clinker, and adjust the hydration rate of the cement clinker.

The utility model discloses an anti-blocking cyclone cylinder for a preheater, which relates to the technical field of preheaters and comprises a cyclone cylinder, an air inlet pipe matched with the cyclone cylinder penetrates through the top of the cyclone cylinder, and a discharge pipe is arranged at the bottom end of the cyclone cylinder; an anti-blocking mechanism is arranged in the discharging pipe in a penetrating mode and used for preventing the cyclone from being blocked. And a gas outlet assembly penetrates through the middle of the top end of the cyclone and is used for increasing the gas discharge rate. The cyclone barrel, the air inlet pipe, the discharging pipe, the anti-blocking mechanism and the air outlet assembly are arranged in a matched mode, so that effective anti-blocking measures can be achieved, the situation that shutdown cleaning is needed due to blockage of the cyclone barrel is greatly reduced, continuity and stability of a production line are guaranteed, meanwhile, direct physical impact can be avoided, and the production efficiency is improved. The equipment abrasion and damage risks caused by repeated striking are reduced, the service life of the equipment is prolonged, and the maintenance cost is reduced.

This invention discloses a combined adjustable material spreading device, comprising a housing, a telescopic adjustment mechanism, an angle adjustment mechanism, and a spreading plate. The housing is equipped with a sliding support and an adjusting support. The telescopic adjustment mechanism includes a handwheel, a nut, a first screw, a threaded sleeve, a thrust bearing, a Y-type connector, and a rotating shaft. The threaded sleeve is mounted on the adjusting support. The threaded sleeve, thrust bearing, handwheel, and nut are connected sequentially. The first screw is screwed into the threaded sleeve. The first screw, Y-type connector, and rotating shaft are connected sequentially, and rotating shaft is connected to a hole in the spreading plate. The angle adjustment mechanism includes a second handwheel, a second screw, a crossbar, a connecting rod, rotating shaft, and a nut. The second screw is screwed into the first screw. The second handwheel, second screw, crossbar, connecting rod, and rotating shaft are connected sequentially, and rotating shaft is connected to a hole in the spreading plate. This invention can adjust the telescopic length and angle of the spreading plate individually or in combination to meet the needs of different production conditions, offering high adjustment accuracy, reliability, and stability.

Provided is a radiant heating device. The radiant heating device according to the present disclosure comprises: a combustion chamber body having a combustion chamber therein; a burner configured to preheat the combustion chamber by supplying fuel and an oxidizer and, after preheating, to supply only fuel into the combustion chamber; an oxidizer injection nozzle for supplying the oxidizer to the combustion chamber; and a gas discharge pipe for discharging exhaust gas circulated in the combustion chamber.

The utility model discloses novel energy-saving limestone calcining treatment equipment, which relates to the technical field of limestone processing, and comprises a base and a calcining kiln arranged on the base, the calcining kiln comprises a calcining cylinder, a feeding cylinder, a sealing cover and a discharging pipe; the calcining barrel is of a hollow structure, one end of the calcining barrel is open, the feeding barrel is rotationally arranged on the outer wall of the open end of the calcining barrel, the sealing cover is arranged at the end, away from the end cover, of the feeding barrel, and the discharging pipe is arranged below the side, away from the feeding barrel, of the calcining barrel; an electric heating plate is arranged in the interlayer of the calcining cylinder; two bearings are arranged on the outer wall of the calcining cylinder, the calcining cylinder can rotate in the bearings, a first lifting device used for adjusting the angle of the calcining cylinder is arranged at the bottom of each bearing, and the first lifting devices are arranged at the top of the base; and the function of uniform calcination is achieved, exhausted hot air is utilized, limestone is preheated, the cost can be reduced, and the practicability is improved.

Provided is a heat exchanger capable of increasing the installation density of a heat transfer medium in the heat exchanger while expanding the selectivity of the heat transfer medium usable as compared with the related art. The heat exchanger includes: a first heat exchange chamber including a first region filled with a granular heat transfer medium; a first introduction port configured to introduce a high-temperature first gas to be treated into the first region; a first discharge port positioned above the first introduction port in the vertical direction and configured to discharge gas from the first heat exchange chamber; a second heat exchange chamber positioned below the first heat exchange chamber in the vertical direction and including a second region filled with the granular heat transfer medium that has flowed in from the first heat exchange chamber; a second introduction port configured to introduce a second gas, having a temperature lower than that of the first gas, into the second region; a second discharge port positioned above the second introduction port in the vertical direction and configured to discharge gas from the second heat exchange chamber; and a regulating member disposed at one or more locations between the end of the first region on the side of the second heat exchange chamber and the end of the second region on the side of the first heat exchange chamber, the regulating member being capable of controlling a gas flow rate.

The utility model belongs to preheater cleaning technical field especially is a kind of preheater skin's cleaning facility, including the high-pressure water gun of being installed on preheater, and the high-pressure water pipe being matched with high-pressure water gun and the footboard being connected with high-pressure water gun and being used to control high-pressure water gun switch, the high-pressure water pipe, high-pressure water gun and footboard are all distributed in the multiple floors of preheater, the high-pressure water pipe set in each floor is connected by connecting pipe, and the floor where the high-pressure water pipe is laid is respectively equipped with different length's cleaning rod, the cleaning rod is used to assist high-pressure water gun to clean the skin inside preheater, by distributing high-pressure water gun, high-pressure water pipe and footboard in the multiple floors of preheater, the efficient cleaning of the skin inside preheater is realized, and the flexibility and efficiency of cleaning are improved;The setting of hand valve enables operator to accurately control the flow of high-pressure water flow, and improves the safety and flexibility of cleaning.

The application relates to the field of kilns, and particularly provides a kiln waste heat utilization device and an energy-saving kiln. The waste heat utilization device comprises an outer heat preservation shell, the outer heat preservation shell is a straight tunnel-shaped structure with openings arranged at two ends, and a chamber of the kiln is arranged inside the outer heat preservation shell; an inner heat preservation shell, the inner heat preservation shell is a straight tunnel-shaped structure with openings arranged at two ends, the inner heat preservation shell is arranged on the inner side of the outer heat preservation shell, a preheating section of the kiln is located above the inner heat preservation shell, a combustion section and a cooling section of the kiln are located inside the inner heat preservation shell, the top of the inner heat preservation shell is communicated with the upper side of the inner heat preservation shell and the inside of the outer heat preservation shell through a top communication pipe, and a gap is arranged between the outer wall of the inner heat preservation shell and the inner wall of the outer heat preservation shell; the application can improve the waste heat utilization efficiency, reduces the equipment cost, the hot air in the outer heat preservation shell also plays a heat insulation role, and heat loss is reduced.

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 invention discloses an aluminum ash rotary kiln and a polyaluminum chloride production process, and relates to the technical field of rotary kilns. The aluminum ash rotary kiln comprises a rotary kiln body, and the rotary kiln body comprises a kiln body, a kiln tail, a kiln head and a spiral conveyor used for feeding materials into the rotary kiln body. According to the aluminum ash rotary kiln, when raw materials are calcined in the rotary kiln and the kiln body rotates, the raw materials can be driven to turn over and fall on a first filter plate under the action of gravity, meanwhile, a second filter plate can be driven by a driving mechanism to move in a reciprocating mode, a plurality of grinding rollers are driven by a first fixing frame and a rotating shaft to roll in a reciprocating mode, and at the moment, the raw materials are evenly mixed. According to the high-temperature calcining device, raw materials on the first filter plate can be tiled, meanwhile, caked raw materials can be ground and smashed, the smashed and tiled raw materials can fall into the kiln body again through the first filter plate, it is guaranteed that the raw materials at the bottom of the kiln body are evenly distributed, caking is avoided, even calcining is guaranteed, and the high-temperature calcining efficiency and quality are improved.