235 results about "Alternative fuels" patented technology

The invention relates to the technical field of machine learning, and discloses a cement kiln alternative fuel consumption prediction method and system based on machine learning. The method comprises the following steps: processing alternative fuel characteristic parameters in a cement kiln system and kiln system operation parameters to obtain a cement kiln multi-source data set; performing thermal analysis test on the alternative fuel sample to obtain an alternative fuel combustion characteristic parameter set; analyzing the dynamic association relationship between the kiln system working condition and the alternative fuel characteristics to obtain a working condition adaptability parameter set; extracting a combustion time-space feature set consumed by the alternative fuel of the cement kiln; performing multi-model parallel processing and prediction result fusion on the combustion space-time feature set to obtain first prediction data; and executing adaptive error correction, and outputting second prediction data and a fuel adjustment suggestion. According to the method, the complex non-linear relation and the time-lag effect between the kiln system working condition and the alternative fuel characteristics are effectively captured, and accurate prediction and optimal control over the alternative fuel consumption are achieved.

The invention relates to the technical field of pure ammonia combustors, in particular to a catalytic auxiliary cracking plasma pure ammonia combustor and an operation method thereof. According to the technical scheme, the device comprises catalytic cracking areas, a purification area, a pre-combustion area, a main combustion area, an ammonia supply area and a waste heat system, the catalytic cracking areas are arranged on the two sides of a combustor and comprise an ammonia gas inlet channel and a catalytic reaction area internally provided with a porous medium, and a catalyst fixedly grows on the surface of the porous medium; the purification area is located outside the combustor and connected with an outlet of the catalytic cracking area through a pipeline, and selective separation membranes are arranged at the outlet end and the exhaust end of the purification area respectively; the pre-combustion areas are distributed on the two sides of the main combustion area, comprise air inlet channels and plasma igniters and communicate with an outlet of the purification area. According to the invention, the problems of ignition, stable combustion and low NOx emission of the ammonia fuel are solved, the unification of efficient energy utilization and industrial applicability is realized, and a key technical support is provided for large-scale application of the ammonia alternative fuel in an industrial kiln.

A vehicle provided with a frame (1) comprising two side members (2, 3) connected together at least by a cross member (4), an alternative fuel module (6) and a support system (5) connected to the frame (1) for supporting the alternative fuel module (6), the support system (5) comprising at least a first support element (7) and a second support element (8), both being configured to be fixedly connected to the alternative fuel module (6) via coupling portion (11, 9b′), the coupling portion (9b′) of the second support element (8) being connected to both the side members (2, 3) and the coupling portion (11) of the first support element (7) being connected to the cross member (4) via a movable connection.

An ignition diagnostic system and method for evaluating and optimizing the ignition performance of internal combustion engines (ICEs), such as those that burn hydrogen (H2) and / or other fuels. According to one example, the ignition diagnostic system and method use an artificial intelligence (AI) model with one or more machine learning (ML) algorithm(s) to identify, predict and / or otherwise evaluate abnormal combustion events, and to provide such information to an electronic control unit (ECU) in real-time. The ECU, in turn, can make combustion-related modifications to one or more components of the ignition system to optimize performance. By integrating the AI model into the ignition diagnostic system and method, a fast and simplified solution is provided that can be implemented across a wide variety of ICEs, including those that burn alternative fuels, where detecting abnormal combustion events and monitoring combustion-related parameters can be important.

METHOD, APPARATUS, COMPUTER DEVICE AND STORAGE MEDIUM FOR DETERMINING ALTERNATIVE FUELS The present invention relates to a method, device, computer device and storage medium for determining an alternative fuel, the method comprising: obtaining a target fuel corresponding to a target cement kiln and a plurality of alternative component categories, property parameters, a maximum carrying capacity of an alternative fuel combination to be selected, as well as a fuel boundary condition, constructing an objective function and a constraint condition; Based on the objective function and the constraint conditions, calculating the initial alternative fuel combination ratio solution for each alternative fuel combination to be selected;using a non-dominated sequential genetic algorithm to optimize the initial alternative fuel combination ratio solution, and calculating the theoretical substitution ratio of each optimized alternative fuel combination; based on the theoretical substitution ratio, selecting a fuel combination from a plurality of alternative fuel combinations to be selected. Based on the theoretical substitution ratio, determining the alternative fuel component scheme corresponding to the target fuel from among the alternative fuel combinations to be selected. The invention solves the problem of fluctuation of working conditions in cement kilns due to the complexity of the composition of alternative fuels, and improves the accuracy and reliability of determining alternative fuels. Figure for abstract: none;

An engine can utilize a combustor to combust fuel to drive the engine. A fuel nozzle assembly can supply fuel to the combustor for combustion or ignition of the fuel. The fuel nozzle assembly can include a swirler and a fuel nozzle to supply a mixture of fuel and air for combustion. Increasing efficiency and meeting emission needs can be met with the use of alternative fuels, which combust at higher temperatures or higher speeds than traditional fuels, requiring improved fuel introduction without the occurrence of flame holding or flashback.

An alternative fuel vertical pre-combustion furnace comprises a vertical combustion chamber furnace body, a multi-stage stepped furnace hearth arranged on the side wall of the pre-combustion furnace body and a pneumatic pulse injection device arranged on the furnace hearth, and castable is arranged on the inner wall of the whole furnace body. Light flammable substances are completely incinerated under the driving of high-speed airflow, heavier flame-retardant substances fall into the next step to be continuously incinerated, the burn-off rate of the alternative fuel is greatly improved after the alternative fuel stays, is scattered and is pre-combusted, and completely-combusted material residues are dispersed by strong injection of compressed air of an air cannon system; therefore, the influence on the cement kiln caused by sedimentation of the material slag agglomerated in the decomposing furnace is solved. And materials on the uppermost combustion platform sequentially slide to the second-stage combustion step platform and then slide to the next-stage combustion platform layer by layer, and the process is repeated. And waste gas and ash after incineration are discharged from the bottom of the pre-combustion furnace and enter a kiln tail decomposing furnace system, when the material slag is harmful to the kiln system, the material slag can be discharged, and high-temperature airflow enters the decomposing furnace.

The invention discloses a coupling low-carbon combustion process device and an adjusting method thereof, and relates to the field of coupling low-carbon combustion process devices, the coupling low-carbon combustion process device comprises a fuel supply system, an oxygen-enriched / total-oxygen supply system, an air supply system, a flue gas circulation system, a fuel combustion system and a flue gas treatment system; the fuel supply system is used for providing solid-phase fuel, liquid-phase fuel and gas-phase fuel; the oxygen-enriched / total-oxygen supply system is combined with the air supply system and used for changing the combustion atmosphere in the combustion furnace and achieving fuel oxygen-enriched / total-oxygen combustion. The flue gas treatment system comprises a two-stage heat exchanger, a cooling tower and a dust collector; the fuel combustion system is composed of a combustion furnace, an online flue gas analyzer and a temperature, pressure and flow detection device. According to the invention, the synergistic effect among different processes is realized, so that the defect of single process application of the existing platform is effectively overcome, a new solution is provided for low-carbon, high-efficiency and clean industrial combustion process, and multiple low-carbon combustion processes such as alternative fuel combustion, oxygen-enriched / oxygen-full combustion, flue gas circulation and the like are organically coupled.

The invention relates to all-solid-waste high-alkalinity sintered ore and a preparation method, and belongs to the technical field of sintering. The sintered ore comprises the following raw materials in parts by weight: 65-75 parts of high-iron solid waste, 8-13 parts of high-carbon solid waste, 10-15 parts of high-calcium solid waste and 8-12 parts of water. Complementation is realized by mixing different solid waste types, the iron source is provided by the high-iron solid waste, the fuel is replaced by the high-carbon solid waste, the alkalinity is adjusted by the high-calcium solid waste, the prepared sintered ore can meet the steelmaking requirement, and the comprehensive utilization rate of the metallurgical solid waste is greatly increased.

The present invention relates to the technical field of alternative fuel in the cement industry. Disclosed is a high-proportion alternative fuel pre-treatment and cement kiln incineration system, comprising a stacking shed, a storage system, a rotary kiln, a pulverized coal burner, a cooler, a tertiary air duct and a preheated raw-material preheater; and further comprising a crushing system, a homogenization system, metering systems, conveying systems, gravity-type feeding systems, a multifunctional decomposition furnace, a special combustor for alternative fuel, and a pneumatic conveying system. In the present invention, the particle size of crushed alternative fuel is controlled on the basis of a flue gas suspension speed, such that the alternative fuel combusts in a suspended manner in the multifunctional decomposition furnace; the alternative fuel is metered by means of the three metering systems, and the alternative fuel in one path is fed into the special combustor; the special combustor and the pulverized coal combustor are arranged one above the other in the rotary kiln, and pulverized coal combustion is used to drive the combustion of the alternative fuel; and the gravity-type feeding systems and their respective two airlock discharge valves, which are alternately opened, are used to feed in the alternative fuel, thereby reducing air leakage during a feeding process.

A turbine engine can utilize a combustor to combust fuel to drive the turbine, which drives the engine. A fuel nozzle assembly can supply fuel to the combustor for combustion or ignition of the fuel. The fuel nozzle assembly can include a swirler and a fuel nozzle to supply a mixture of fuel and air for combustion. Increasing efficiency and carbon-containing emission needs benefit from the use of alternative fuels, which combust at higher temperatures than traditional fuels, requiring improved fuel introduction without the occurrence of flame holding or flashback.

The invention relates to the technical field of cement mine digital mining engineering, and discloses a cement production line carbon emission data cross coupling verification method, which comprises a carbon emission online monitoring module A1, a carbon emission online accounting module A2 and a big data cross coupling model A3, the carbon emission on-line monitoring module A1 is a carbon emission on-line monitoring system mounted at a pollution source discharge port at the kiln tail of a cement production line; the carbon emission online monitoring system comprises automatic monitoring of flue gas CO2 concentration, flue gas flow rate, flue gas humidity, flue gas temperature and flue gas pressure parameters and real-time carbon emission obtained through calculation of the automatic monitoring parameters. According to the invention, cross checking and data coupling can be carried out on the carbon emission data obtained by the two methods through a big data model, a universal automatic monitoring technology and the accounting business of a cement production line are fused, the influence of alternative fuel on the monitoring of the carbon emission in the cement industry is solved, and the effective connection of an accounting method and online monitoring is realized.

The invention relates to the technical field of energy processing, and provides a powder alternative fuel system, which comprises a crushing bin; a supporting part is arranged at the bottom of the crushing bin, a mounting frame is arranged on one side of the crushing bin, a crushing bin is arranged on the surface of the mounting frame, two sets of symmetrically-arranged crushing parts are arranged on the inner wall of the crushing bin, and a driving part matched with the crushing parts is arranged on one face of the crushing bin. According to the device, raw materials are thoroughly and homogeneously crushed into fine powder through combination of a double-roller type coarse crusher and a high-speed crusher, a heating pipe and a temperature control system are innovatively integrated in a crushing bin, online drying can be performed according to the humidity of the raw materials, and the fuel heat value is increased. The processed powder fuel is stably and directly conveyed to a combustor in an anti-blocking and anti-backfire mode through a spiral-rotary valve-wind power jet mechanical and pneumatic two-stage closed conveying chain, and full-process automatic and closed operation from raw materials to ignition points is achieved.

The invention relates to the technical field of biofuels, and discloses an aviation kerosene biological alternative fuel based on multi-objective optimization, which is characterized in that a comprehensive selection index system comprising density, kinematic viscosity, thermodynamic characteristics (lower calorific value and hydrogen-carbon ratio) and molecular weight is established based on a multi-objective optimization model constructed by a genetic algorithm; the invention discloses a biological fuel formula for replacing RP-3 aviation kerosene by optimizing the design of biological alternative fuel components, the biological alternative fuel is prepared from the following components in parts by volume: 70-80 parts of second-generation biodiesel, 10-15 parts of tetrahydrofuran and 7-15 parts of isopropanol, the components are easy to obtain, the production process is simple, and the biological alternative fuel is suitable for large-scale production. The second-generation biodiesel, tetrahydrofuran and isopropanol are used as raw materials, the obtained biofuel has low kinematic viscosity, the low calorific value reaches 43 MJ / kg or above, the physicochemical property of the biofuel is similar to that of RP-3 aviation kerosene, and the biofuel has good substitutability and wide popularization value.

The invention discloses a cement kiln alternative fuel dehumidification device, and relates to the technical field of cement kiln alternative fuels. Dry hot air is blown into the drying box through the hot air blower, alternative fuel in the rotary drum is dried, meanwhile, the rotary drum rotates and is matched with the stirring piece to stir the alternative fuel, and therefore the alternative fuel is scattered, and the alternative fuel drying effect is further improved. And hot air is conveniently conveyed into the inserting groove through the air guide pipe by means of the hot air blower, and then the hot air in the inserting groove passes through the air spraying holes, so that airflow in the stirring piece is sprayed into the rotary drum through the air spraying holes, and therefore the alternative fuel in the middle of the rotary drum is dried.

The invention provides a control method and device applied to an alternative fuel blending combustion system, and belongs to the technical field of alternative fuel combustion. The control method applied to the alternative fuel blending combustion system comprises the following steps that S1, operation data are collected; s2, acquiring a current alternative fuel state; s3, the tailing adjustment amount is obtained; s4, the tailing adding amount is obtained; s5, the current alternative fuel state is that the output value of the tailings being put into use is the first alternative-fuel-free tailing use amount, the current alternative fuel state is that the output value of the tailings being cut off is the first alternative-fuel tailing use amount, and the current alternative fuel state is that the output value of the tailings being cut off is the second alternative-fuel-free tailing use amount. The current alternative fuel state is that the tail coal output value is completely started and is the second alternative fuel tail coal consumption, and the current alternative fuel state is that the tail coal output value is completely stopped and is the third non-alternative fuel tail coal consumption. The complete control method can adapt to the whole process of alternative fuel from starting to stopping.

The present application relates to coal gangue treatment technical field, provide a kind of coal gangue-containing biofuel particle and its preparation method and application.The biofuel particle provided by the present application includes: coal gangue powder 60~62%;14~15% of oil-stained mixture;High molecular waste powder 24~26%;The oil-stained mixture is waste engine oil and / or oil-stained material;The oil-stained material is obtained by crushing and drying in turn from swill.The oil-stained mixture used in the present application is rich in oil and fat, with high volatile matter, easy to ignite, coal gangue and waste tires and / or waste plastic bottles have high fixed carbon content, long burning time, so that the biofuel particle of the present application has high calorific value, stable combustion, can be used as alternative fuel to alleviate the problem of traditional fossil fuel shortage.The present application uses catering leftovers swill, waste tires and / or waste plastic bottles and coal gangue powder, to prepare biofuel particles, which solves the various hazards caused by long-term storage of coal gangue.

To provide an alternative fuel vessel capable of reducing inboard operation arising with processing of drain with alternative fuel mixed in.SOLUTION: An alternative fuel vessel 1 includes, for example as shown in figure 2: a first recovery tank 13 for recovering drain discharged from a fuel engine (an alternative fuel engine 4 and a power generator 5) when using natural fossil fuel; and a second recovery tank 14 for recovering drain discharged from the fuel engine (the alternative fuel engine 4 and the power generator 5) when using the alternative fuel.SELECTED DRAWING: Figure 2

An engine may utilize a burner to combust fuel to drive the engine. A fuel nozzle assembly may supply fuel to the burner for combustion or ignition of the fuel. The fuel nozzle assembly may include a swirler and a fuel nozzle to supply a fuel and air mixture for combustion, which may supply a primary fuel supply and a secondary fuel supply. Increased efficiency and reduced emissions require the use of alternative fuels that burn at higher temperatures or at faster burn rates than conventional fuels, requiring improved fuel introduction without flame holding or flashback.

Systems and methods for providing alternative fuel, in particular hydrogen photocatalytically generated by a system comprising photoactive nanoparticles and a nitrogenase cofactor are provided. In one aspect, the system includes a water soluble cadmium selenide nanoparticle (CdSe) surface capped with mercaptosuccinate (CdSe-MSA) and a NafY.FeMo-co complex comprising a NafY protein and an iron-molybdenum cofactor (FeMo-co), wherein the CdSe-MSA and NafY·FeMo-co complex are present in about 1:2 to 1:10 molar ratio.

The utility model provides an alternative fuel crushing device which comprises a discharging base, a first crushing barrel is fixedly arranged at the top of the discharging base, a second crushing barrel is arranged at the top of the first crushing barrel, a first crushing mechanism for crushing alternative fuel is arranged in the middle of the top end of the second crushing barrel, and a second crushing mechanism for crushing the alternative fuel is arranged in the middle of the first crushing barrel. A movable mechanism for assisting in discharging is arranged on the outer side of the crushing cylinder I; the first crushing mechanism comprises a mounting disc, a first motor, a rotating rod, first crushing blades and spiral blades, the mounting disc is arranged at the top end of the second crushing barrel, and the first motor is arranged in the middle of the top face of the mounting disc. By means of the first crushing mechanism and the second crushing mechanism which are arranged in a separated mode, the alternative fuel can be primarily crushed to reduce the size difference of alternative fuel particles, the crushing effect of the alternative fuel is controlled through secondary crushing, and the alternative fuel can be efficiently and evenly crushed through the crushing device in cooperation with dredging and crushing of the movable mechanism.

This invention relates to a multi-biomass alternative fuel feeding system for cement production, comprising a negative pressure separator. The air inlet of the negative pressure separator is connected to a bag packaging unit, the air outlet of the negative pressure separator is connected to a Roots vacuum pump, the bottom outlet of the negative pressure separator is connected to a storage silo, the top of the storage silo is equipped with a level gauge, the conical part of the storage silo is connected to the Roots vacuum pump, a pneumatic gate valve is connected directly below the bottom outlet of the storage silo, a metering scale is connected directly below the pneumatic gate valve, a buffer silo is connected below the outlet of the metering scale, a belt conveyor is connected to the top of the buffer silo, an inverted conical feed silo and an iron separator are connected to the tail of the belt conveyor, a through-type belt scale is installed in the middle of the belt of the belt conveyor, and a pneumatic conveying device is connected to the bottom of the buffer silo. This invention can simultaneously process multiple types, different forms, and different entry methods of biomass alternative fuels. It has a compact structure, low investment, integrates storage, metering, and conveying, eliminates the need for bag breaking, is environmentally friendly, allows for rapid switching, provides stable multi-point feeding, and reduces energy consumption.

Turbine engines can utilize a combustor to combust fuel to drive a turbine that drives the engine. A fuel nozzle assembly can supply fuel to the combustor for combustion or ignition of the fuel. The fuel nozzle assembly can include a swirler and a fuel nozzle to supply a mixture of fuel and air for combustion. Increased efficiency and carbon-containing emissions requirements benefit from the use of alternative fuels that combust at higher temperatures than traditional fuels, requiring improved fuel introduction without flame holding or backfiring.

This invention discloses a system and method for coupling alternative fuel vortex gasification with a cement production line. The system includes a vortex gasification device, a decomposition furnace, a flue gas chamber, and a distribution device. The outlet of the distribution device is connected to both the flue gas chamber and an ash cooling system. The vortex gasification device includes a vortex gasification section, a suspension section, a fluidized bed section, and a wind chamber section. The vortex gasification section is equipped with an air inlet pipe, and a flue gas outlet pipe is connected between the air inlet pipe and the flue gas chamber. The top of the suspension section is equipped with a flue gas outlet connected to the decomposition furnace. The vortex gasification device is equipped with an alternative fuel feed inlet, a difficult fuel feed inlet, and a bed material feed inlet. The fluidized bed section is equipped with a slag outlet connected to the distribution device. This invention uses a vortex gasification device for the pyrolysis and gasification of alternative fuels, which does not affect the stable operation of the cement clinker calcination system. The resulting combustible gas and carbonaceous fly ash are more easily combusted after entering the decomposition furnace, and the NOx concentration in the decomposition furnace can be reduced.

The present invention relates to the technical field of dust collectors, and specifically to an anti-clogging dust collector for alternative fuels, comprising: a dust box, wherein the lower end of the dust box is fixedly connected to a dust hopper, the lower end of the dust hopper is fixedly connected to a dust outlet frame, the lower end of the dust outlet frame is fixedly connected to a dust outlet hopper, and the dust box is provided with a conveying mechanism; and a gathering mechanism, wherein the gathering mechanism includes an insulating cylinder that is rotatably connected to the inner wall of the dust hopper and the dust outlet frame. The present invention provides a gathering mechanism and an electrostatic generating mechanism, wherein the second conductive rod can lead out the static electricity on the multiple metal rods and multiple metal plates corresponding to the L-shaped conductive rod through an L-shaped conductive rod, a wire, a metal bar, multiple tooth plates and multiple gears, and neutralize the charges on the multiple metal rods and multiple metal plates. At this time, the fibers on the multiple metal rods and multiple metal plates will fall downward into the conveying cylinder due to being bonded together, thereby conveying the fibers out.

A method for operating a turbomachine (10) includes directing a stream of ammonia vapor to one or more hot gas path components (300) of the turbomachine (10). This transfers heat from the one or more hot gas path components (300) to the ammonia vapor. The method also includes cracking the ammonia vapor using the heat from the one or more hot gas path components (300), producing hydrogen gas and nitrogen gas. The method further includes directing the hydrogen gas produced by cracking the ammonia vapor to a combustion chamber (24) of the turbomachine (10).

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

To provide an alternative fuel vessel capable of suppressing contamination of residence area by alternative fuel gas.SOLUTION: An alternative fuel vessel 1 includes a plurality of fresh air inlets for taking in fresh air to a prescribed place in residence area 8 from outside the vessel (a first fresh air inlet 14 and a second fresh air inlet 15). The first fresh air inlet 14 and the second fresh air inlet 15 are installed in positions separated from each other. For example, the first fresh air inlet 14 is arranged on the port side and the second fresh air inlet 15 is arranged on the starboard side.SELECTED DRAWING: Figure 3

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

The utility model discloses an alternative fuel pyrolysis gasification and cement production line coupling system. The system comprises a decomposing furnace, a smoke chamber, an n-stage raw material preheating system, a pyrolysis gasification device and an ash cooling and conveying system, a raw material distributing device is arranged on a blanking pipe of an (n-1)-stage cyclone cylinder in the n-stage raw material preheating system; an outlet of the raw material distributing device is respectively communicated with a raw material inlet of the decomposing furnace and a hot raw material inlet of the pyrolysis gasification device; the pyrolysis gasification device comprises a suspension section positioned at the upper part, a transition section and a boiling section positioned at the middle part, and an air distribution system and a slag outlet positioned at the lower part; a tertiary air inlet is formed in the side surface of the suspension section, and a flue gas outlet communicated with the decomposing furnace is formed in the upper part; an alternative fuel inlet, a bed material inlet and a hot raw material inlet are respectively formed in the side surface of the middle part; and the slag outlet is respectively communicated with the smoke chamber and the ash cooling and conveying system. According to the utility model, the alternative fuel heat utilization efficiency and fossil fuel substitution rate of the cement kiln can be greatly improved.