72 results about "Gas solid" patented technology

The application relates to a gas-solid reaction rotary furnace. The gas-solid reaction rotary furnace comprises a support frame, a base, a frame rotatably connected to the base, a first driver for driving the frame to rotate, a rotary furnace pipe arranged in the frame, the rotary furnace pipe comprising a powder inlet and outlet end and a gas inlet and outlet end, and a gas assembly arranged at the gas inlet and outlet end of the rotary furnace pipe, wherein when the gas assembly supplies gas to the rotary furnace pipe, the rotary furnace pipe can be moved to a state where the gas inlet and outlet end is higher than the powder inlet and outlet end. During operation of the gas-solid reaction rotary furnace, the rotary furnace pipe is kept in an inclined rotating state, the loading capacity of the rotary furnace pipe is increased, the production capacity of a single furnace is increased, the energy consumption of unit weight of material is reduced, and the processing time and cost are reduced.

The device is mainly used for zinc powder waste slag recycling treatment device of thermal zinc spraying, establishes an integrated waste slag treatment system, adopts high-efficiency electromagnetic induction heating technology, precise temperature control mechanism, combination design of rotary valve airlock and high-precision filter screen, breaks through the defects of low separation efficiency and gas leakage of traditional separation equipment, realizes gas-solid separation, introduces a high-temperature high-pressure reaction kettle for carbon dioxide green conversion process, and cooperatively realizes the recycling of zinc resources (recycled zinc can be directly used for thermal zinc spraying) and the environmental protection treatment of carbon dioxide (urea is generated), greatly improves the economy and sustainability.

The present application belongs to the technical field of acetylene preparation, and discloses a method and system for efficiently preparing acetylene and hydrogen from natural gas based on turbine cracking. The method comprises the following steps: obtaining 95%-100% purified methane gas through raw material pretreatment, preheating to 523-823 K, and then feeding into a turbine cracking reaction unit to be heated to 1800-2200 K within 1-10 ms and cracked for 1-10 ms; the cracked gas is quenched to below 800 K within 0.5-3 ms and the waste heat is recovered; finally, carbon black, high-purity acetylene and hydrogen are obtained through gas-solid and gas separation. The system comprises raw material pretreatment, preheating, turbine cracking reaction, quenching and waste heat recovery, gas-solid separation, gas separation units, and a matching monitoring and collaborative control module, and realizes multi-parameter collaborative control and online carbon cleaning. The present application does not introduce oxygen, the conversion rate of natural gas is 92%-95%, the acetylene yield is 83%-87.5%, the energy consumption is low, the products are easy to separate, it is green and environmentally friendly, and it is suitable for industrial continuous production.

This invention discloses a gasification reduction ironmaking system and method for the synergistic resource utilization of solid and hazardous waste and red mud. The system includes a raw material pretreatment unit, a pyrolysis gasification and purification unit, a gasification reduction ironmaking unit, and a waste heat comprehensive utilization unit. After pretreatment, the solid and hazardous waste enters a multi-stage gasifier for pyrolysis and gasification reactions. Combined with a two-stage gas-solid separation and return structure, the gas yield and carbon conversion rate are improved. The gasified gas enters the reduction furnace and pre-reduction furnace for cascade reduction, realizing the efficient recovery of iron resources from red mud. The waste heat comprehensive utilization unit performs multi-stage heat exchange on the tail gas and uses it for the preparation of gasifying agents, realizing closed-loop heat utilization. This invention constructs a multi-cycle system of gas, heat, and materials, realizing the recycling of gas, heat, and materials. It not only improves the resource utilization rate but also obtains tail gas rich in methane, achieving the synergistic and efficient resource utilization of solid and hazardous waste and red mud.

The utility model provides a kind of sludge treatment system of coupling carbonization and gasification, including pyrolysis unit, combustion unit, waste heat recovery unit and flue gas collection unit. Among them, pyrolysis unit includes pyrolysis furnace and cyclone separator, the top of pyrolysis furnace is equipped with gas injection port, it is suitable for the temperature of fluidized gas in pyrolysis furnace is adjusted by inputting oxygen, to control pyrolysis furnace in gasification reaction or carbonization reaction;Cyclone separator is suitable for the pyrolysis product is carried out gas-solid separation and obtains pyrolysis gas and pyrolysis carbon, the outlet of cyclone separator includes gas product outlet and solid product outlet;Combustion unit is suitable for receiving pyrolysis gas generated in pyrolysis furnace and carries out combustion reaction, obtains flue gas;Waste heat recovery unit includes heat exchange component, heat exchange component is communicated with combustion unit, it is suitable for receiving and recovering heat in flue gas by heat transfer;Flue gas collection unit is communicated with heat exchange component, it is suitable for purifying and collecting flue gas.

The present application relates to a kind of steel enterprises gas-solid pollutant discharge integrated management system and method, belong to steel enterprises environmental management technical field.The system includes four modules of environmental protection digital map module, wisdom dispatching and path optimization module, risk early warning module and account management module.The method first establishes the information database of whole plant waste gas treatment, carries out unified coding naming and identity electronic tag transformation to the waste gas treatment facilities and its associated solid waste of each production unit, secondly, sorts out the solid waste utilization way, carries out information transformation to solid waste transport vehicle, metering system, then again access inspection system data, transfer warehouse inventory information and solid waste treatment unit's inventory information.The present application can realize the efficient management and control of whole process of atmospheric treatment and solid waste circulation by the treatment, management and control integration of gas-solid pollutant, improve the accuracy, timeliness and standardization of management.

This invention discloses an apparatus for preparing high specific surface area calcium hydroxide, comprising a lime premixing tank and a digestion reactor. The lime premixing tank contains a ribbon agitator connected to a stirring motor at the top of the tank. Steam is conveyed to the premixing tank via a Venturi mixer I. A powder distributor and baffles within the reactor ensure uniform material distribution and gas-solid separation. A closed-loop tail gas treatment system is employed, with a sawtooth distributor and spiral nozzles in the scrubbing tower providing efficient dust removal. Purified wastewater is recycled to Venturi mixer II via a booster pump for reuse. Water is atomized and replenished in the reaction zone via spiral nozzle II to enhance the three-phase reaction. The product settles via baffles and is discharged under control by a rotary valve, then collected after cooling by a screw conveyor. This invention, through a closed-loop design of premixing-steam conveying-tail water reuse-separation, achieves continuous production and efficient resource utilization, significantly improving the specific surface area and production efficiency of calcium hydroxide.

The embodiment of the application provides a kind of low energy consumption compression formula direct current atomization air pump operation control method and system, comprising: the gas flow of detecting airflow channel, particle size and average pressure;According to the gas flow, particle size and average pressure, gas flow basic characteristics and gas flow derived characteristic quantity are calculated;Through the grid division of gas flow, the gas region grid parameter is obtained by the gas flow basic characteristics and gas flow derived characteristic quantity;According to the gas region grid parameter, gas-solid atomization model is generated;According to the first control result of gas-solid atomization model, the first control result is compared with preset control result, and adjustment coefficient sequence is generated;The operation of atomization air pump is controlled by the adjustment coefficient sequence, and the parameter generation ability of control model is improved by the way of improvement for the adaptive control parameter of airflow channel, the generation accuracy of parameter is improved, atomization efficiency can be effectively improved, and the consumption time of atomization is reduced.

This invention discloses a dual-duct vertical cooling device for material cooling and waste heat utilization. The main body of the device consists of a cooling cylinder, a feed hood, a rotary support platform, a discharge hood, and an external support frame. Multiple sets of cooling cones and a material collection tray are vertically arranged inside the cylinder, with a central ventilation duct in the center. The external support frame, through circumferential guide wheels and a cylinder retaining ring, ensures stable operation. The cooling cones adopt a combination of outer and inner cone structures, combined with a skirted concave design, which, combined with the rotation of the equipment, achieves flat material dispersion, expanding the gas-solid heat exchange area. The dual-duct system operates independently: turbid air is fluidized and pressure-stabilized by the discharge hood before directly exchanging heat with the material, with the heated gas used for material preheating; clean air indirectly exchanges heat with the cone walls through the central ventilation duct, forming clean air for use in the plant area. This invention achieves uniform material cooling, broadens the pathways for waste heat utilization, improves cooling effect and waste heat recovery efficiency, and is suitable for rotary kiln production lines in magnesium smelting and other similar applications.

The application relates to a biomass gasification device and relates to the technical field of biomass gasification, which comprises a gasification hearth, a fluidized bed is arranged in the gasification hearth, a bubbling bed is arranged in the gasification hearth, a biomass gasification area is arranged between the bubbling bed and the fluidized bed, and the biomass gasification area is used for making biomass stack combustion; the bubbling bed is located at the upper end of the biomass gasification area, a feeding device is arranged on the gasification hearth, an air inlet pipe is arranged on the gasification hearth, the air inlet pipe is used for blowing air into the fluidized bed, the air inlet pipe is used for making fuel in the biomass gasification area tumble, the air inlet pipe is used for blowing the fuel which is not fully combusted on the fluidized bed to the bubbling bed, a cyclone separator is arranged on the upper portion of the gasification hearth, the cyclone separator outputs relatively clean combustible gas after carrying out gas-solid separation on dust-containing combustible gas, the cyclone separator is used for inputting the fuel which is not fully combusted into the bubbling bed, and an ignition device is arranged on the bubbling bed and the fluidized bed. The application has the effect of fully gasifying biomass fuel.

This application discloses a screw conveyor and a dryer discharge system with grading and crushing functions. The screw conveyor includes a cylinder, a shaft, screw blades a and b, a motor, and a separation pipe and a feeding pipe perpendicular to the cylinder. A feed inlet is located at the left end of the cylinder. The feeding pipe and separation pipe are located at the top and bottom of the cylinder, respectively, and their air passages are connected. An air chamber is located on the outside of the separation pipe. A smooth shaft is located in the middle of the shaft, corresponding to the junction of the separation pipe and the feeding pipe. Screw blades a are located at the left end and b at the right end, with the two screw blades rotating in opposite directions. Material enters the cylinder through the feed inlet and falls into the separation pipe under the action of screw blades a. Smaller particles are carried by the airflow and flow out through the upper air outlet a via the feeding pipe for gas-solid separation. Larger particles and lumps are directly crushed. The screw conveyor and discharge system of this application can grade, convey, and crush dried products, reducing the transportation and crushing processes of lumps, saving manpower, and being environmentally friendly.

The application discloses a kind of well down pipe string erosion risk assessment method based on gas field production parameters, comprising the following steps, step 1, based on the relationship between the deformation wear amount, cutting wear amount and particle impact load of parent material, the production situation is established;Step 2, based on the production pipe string structure, the gas-solid erosion prediction model of production pipe string is established, and the grid-independent solution is obtained;Step 3, according to the relationship between the deformation wear amount, cutting wear amount and particle impact load in step 1, the gas-solid erosion prediction model is optimized to the error within 5% range;Step 4, based on the direct relationship between the optimized gas-solid erosion prediction model and production parameters, determine the production parameters corresponding to the erosion degree;Step 5, establish three-dimensional critical production parameter chart containing yield, pressure, sand production, according to the production parameters in step 4, erosion risk assessment is carried out on production pipe string of different materials.

This invention discloses a shockwave cyclone reactor and method for biomass flash pyrolysis. The reactor is a tubular structure and includes at least: a shockwave preheating section, which includes a tubular shell and a rotating shaft disposed within the shell, with a circumferential gap between the rotating shaft and the tubular shell forming a gas channel; the gas channel is provided sequentially along the gas flow direction by: a first stator for initial acceleration of the process gas, a rotor for accelerating the process gas to supersonic speed, and a second stator for generating shockwave losses and rapidly raising the temperature of the process gas; a biomass particle inlet is located downstream of the shockwave preheating section and arranged tangentially along the circumference of the tubular reactor, for mixing the biomass particles with the shockwave-heated gas; guide vanes for forming a cyclone are provided between the biomass particle inlet and the shockwave preheating section; a pyrolysis section is located below the biomass particle inlet and includes a cylindrical section and a conical section; the biomass particles and high-temperature gas form a cyclone in the cylindrical section, pyrolysis is performed in the cyclone state, and gas-solid separation is performed in the conical section.

This invention belongs to the field of biochar gasification hydrogen production technology, specifically designing a method and apparatus for preparing high-purity hydrogen, including the following steps: S1, a mixture of biochar and sodium borate is fed into the apparatus for crushing, drying, and preheating; S2, the mixture from step S1 is fed into a reaction chamber, and carrier gas and steam are introduced for a high-temperature reaction, yielding a mixed gas and solid waste; S3, the mixed gas from step S2 is passed through a gas-solid separator and a pressure swing adsorption device, finally reaching a hydrogen-rich collection device to obtain high-purity hydrogen; S4, the solid waste from step S2 is fed into a waste residue treatment tank, and after heating treatment, regenerated sodium borate is generated. The regenerated sodium borate and biochar are then taken out and fed back into the apparatus for recycling. This invention uses biochar as raw material and couples it with a sodium borate recycling process, offering advantages such as high hydrogen purity, low carbon footprint, environmental friendliness, and sustainable operation, providing an efficient and feasible technical solution for biochar hydrogen production.

The utility model discloses a kind of controllable gas temperature recovery devices for low temperature powder, it is related to powder temperature recovery technical field;And the utility model includes temperature recovery pipeline, one end of temperature recovery pipeline is fixedly connected with fan equipment, the inside fixed mounting of temperature recovery pipeline has resistance heater, the inside fixed mounting of temperature recovery pipeline is close to the side of resistance heater and is equipped with valve, the top of temperature recovery pipeline is fixedly installed with electromagnetic device, the drive end of electromagnetic device is connected with valve, the top of temperature recovery pipeline middle part is fixedly installed with blanking tube;Through the cooperation of fan equipment, temperature recovery pipeline, resistance heater, valve, temperature sensor, electromagnetic device, again through starting motor rotates driving bevel gear, driving bevel gear rotation drives driven bevel gear rotation, driven bevel gear rotation drives rotating shaft and deflector rotation, to realize rotating airflow enhances gas-solid mixing, improves heat transfer efficiency, also prevent powder aggregation, ensure uniform heating, further improve powder temperature recovery efficiency.

The application discloses a gas-solid separation device and a calcium carbonate preparation process. The gas-solid separation device comprises an outer cylinder, a gas inlet pipe fixedly connected with the side wall of the outer cylinder and communicating with the top of the outer cylinder, an inner cylinder fixedly connected with the inner top wall of the outer cylinder and communicating with the inner top wall, and outer spiral blades fixedly sleeved on the inner cylinder and located between the inner cylinder and the inner wall of the outer cylinder. The top of the outer cylinder is fixedly connected with a gas outlet pipe for discharging the gas entering from the lower end of the inner cylinder. The bottom of the outer cylinder is provided with a discharge assembly. The top of the outer cylinder is provided with a central shaft rotatably connected with the top. The bottom of the inner cylinder is provided with a filter screen assembly sleeved on the central shaft. The outer cylinder is provided with a driving mechanism for controlling the rotation of the central shaft to make the filter screen assembly vibrate. The application can vibrate and clean the filter screen assembly, and ensures the filtering effect and the gas-solid separation efficiency.

This invention belongs to the field of flue gas treatment technology and provides a process for desulfurization, denitrification, and dust removal of flue gas from waste incineration power plants. The process includes the following steps: Step 1: The flue gas from the waste incineration boiler outlet is introduced into a circulating fluidized bed reactor for desulfurization treatment. After the desulfurization reaction, the gas-solid mixture is separated by a gas-solid separator to obtain desulfurized flue gas; Step 2: The temperature of the desulfurized flue gas is adjusted using a burner, and then introduced into an integrated dust and nitrogen removal device with ceramic fiber catalytic filter tubes inside. While filtering dust, a selective catalytic reduction denitrification reaction occurs on the surface and inside of the filter tubes to obtain denitrified and dust-removed flue gas; Step 3: The denitrified and dust-removed flue gas is discharged externally by an induced draft fan. This invention simplifies the desulfurization, denitrification, and dust removal process, reduces the number of equipment and floor space required, lowers system investment and operation and maintenance costs, and simultaneously meets the stringent requirements for waste incineration flue gas emissions.

This invention relates to the field of metallurgical solid waste resource utilization and waste heat recovery technology, and discloses a system and method for separating dust components using waste heat from electric arc furnace steel slag. The system includes: an electric arc furnace steel slag heat exchanger, whose outlet is connected to a first waste heat boiler and a temperature regulating furnace; a mixing silo for mixing electric arc furnace dust and biomass carbon powder, the mixing silo being connected to the temperature regulating furnace; a circulating fluidized bed connected to the temperature regulating furnace; and a high-temperature dust collector connected to the circulating fluidized bed, used to separate the gas-solid mixture after the circulating fluidized bed reaction into weakly reducing dust and hot air. The hot air is transported to a second waste heat boiler for heat exchange, and the weakly reducing dust is separated into iron tetroxide solid and zinc-rich ash by a magnetic separator. This invention adopts a "selective weak reduction-magnetic separation for iron extraction-zinc oxide enrichment" route, achieving high iron and zinc separation efficiency, high product purity, and realizing cascade utilization of waste heat. With dual waste heat boilers, the thermal energy utilization rate is high.

The utility model relates to deodorization device technical field, and disclose a kind of PP grid deodorization device of double air flue shunt, including device main body, servo motor and fan, the output end spline connection of servo motor has liquid injection mechanism.The PP grid deodorization device of double air flue shunt, by the setting of inlet pipe, efficiency mechanism, fan and filter mechanism, when deodorization device works, after fan inhales stench, wind volume is adjusted dynamically by solenoid valve, stench forms rotating airflow into conical cylinder by spiral inlet pipe, realizes gas-solid primary separation (relatively heavy particulate matter is collected along cylinder wall and settles down) under the action of centrifugal force, after separation, gas forms vortex and is discharged into filter box by exhaust pipe, successively through activated carbon filter screen adsorption VOCs and HEPA filter screen deep purification, finally clean air is discharged by fan, so that by double air flue structure, different stench component optimization processing path can be aimed at, spiral airflow prolongs contact time and improves separation efficiency.

The present application relates to the technical field of post-treatment of titanium sponge production, in particular to a dust removal method and system for reducing chlorine content, the system comprising a gas collecting hood, a lateral air inlet, a multi-stage flow guide baffle, a heat dissipation fin, a forced cooling unit, a temperature sensor, a control system, a dust collecting hopper and a dust discharge valve; the method realizes preliminary separation of coarse particles by forming a cyclone through tangential air inlet, and the three-stage collaborative cooling system composed of the multi-stage flow guide baffle, the heat dissipation fin and the forced cooling unit stably controls the temperature of chlorine at 60-70 DEG C, so as to promote the full condensation of gaseous chlorides, and then realize gas-solid separation through gravity settling, and the collected dust is directly returned to the electrolytic cell for recycling. The present application has high heat exchange efficiency, the dust recovery rate is not less than 90%, the dust content of purified chlorine is not higher than 10 mg / m3, the maintenance frequency of subsequent equipment is greatly reduced, and the present application has energy saving and environmental protection and high adaptability, and is suitable for various electrolytic chlorine production scenes.

The application discloses a thermogravimetric analysis device and method for high-humidity multi-component atmosphere reaction kinetics research, and belongs to the technical field of thermogravimetric analysis instruments.The device comprises a reaction module, a heating furnace, a weighing module, a gas distribution module and an analysis module; the reaction module is vertically arranged in the heating furnace, and the core is a reaction tube main body which is open at the lower part; the side surface is connected with a gas inlet pipe and a sampling pipe from top to bottom; the weighing module is located below the reaction module and comprises a weighing balance, a water cooling unit and a weighing support rod; the water cooling unit can control the water vapor condensation area and stabilize the balance temperature; the gas distribution module can provide a multi-component reaction atmosphere containing controllable concentration water vapor; and the analysis module can detect the tail gas composition in real time.The application can realize low gas-solid mass transfer resistance, stable control of a high-humidity environment, wide particle size sample measurement and rapid temperature rise and fall, and is suitable for high-humidity multi-component atmosphere gas-solid reaction kinetics research in the fields of combustion, catalysis, adsorption and the like.

The present application relates to the technical field of waste heat collection, and particularly relates to a diesel generating set waste heat collection device and a method thereof. The technical problem to be solved is to provide a diesel generating set waste heat collection device which can efficiently recover waste heat and has good gas-solid separation and self-cleaning capacity. The technical scheme of the present application is as follows: comprising a flue gas pipe and the like; a bend is arranged on the flue gas pipe; one end of the bend is connected with a waste heat box through a flange; a pipeline is installed in the waste heat box; the pipeline is sealedly connected at both ends and penetrates through the waste heat box; the lower end of the pipeline is a water inlet, and the upper end is a water outlet; and helical fins are installed on the outer wall of the pipeline. In the present application, the helical fins are used to guide the formation of helical air flow on the flue gas side, and the clockwise and counterclockwise alternating helical water channels are used to generate vortex flow on the water side, so that the two work together to greatly improve the convective heat transfer coefficient and heat exchange area, and significantly improve the waste heat recovery efficiency.

The present application relates to gas-solid fluidization reaction technical field, disclose a kind of nozzle, gas distributor, fluidized bed reactor and application, the nozzle includes nozzle, the nozzle includes conical tube section and straight pipe section from feed end to discharge end, at least one baffle member is provided in the straight pipe section, the outer wall surface of the baffle member is sealingly connected with the inner wall surface of the straight pipe section, the baffle member has material passage communicated with the feed end, the outlet direction of the material passage is not identical with the direction of the discharge end of the nozzle.The present application can avoid the particles falling into the nozzle and then causing blockage, thereby effectively promoting gas-solid contact, mixing, improving fluidization effect.

This invention proposes a cooling system suitable for server motherboards, relating to the field of cooling technology. The cooling system includes a cooling component, a cooling chamber, and a cooling plate. A gas-solid mixture generated by the cooling component is sprayed onto the cooling plate through the cooling chamber, rapidly cooling the chip attached to the back of the cooling plate. The cooling component includes a reaction element and a spray element connected to the reaction element. The cooling chamber and the spray element are connected by threads. The cooling plate is fixedly connected to the bottom of the cooling chamber, and the cooling plate is in close contact with the chip. The reaction element converts liquid carbon dioxide into subcritical carbon dioxide, which is then sprayed into the cooling chamber through the spray element. Because the cooling plate is positioned in the spray direction of the spray element, the gas-solid mixture is ultimately sprayed directly onto the cooling plate, rapidly cooling it and consequently, the chip attached to the cooling plate is also rapidly cooled.

The present application belongs to the technical field of erosion wear test, in order to solve the problem that it is difficult to switch or superimpose various medium erosion conditions in the same device, a fan blade material erosion test device and method based on annular jet disc are provided, which comprises a container cabinet, a disc jet unit, a sample rotating motion unit and a bottom circulating water tank unit; the annular jet disc is provided with a medium flow channel extending in the circumferential direction; the nozzles located in the corresponding area of the liquid disc pipeline constitute a water jetting area for rain erosion; the nozzles located in the corresponding area of the sand disc pipeline constitute a sand jetting area for wind-sand or gas-solid mixed erosion; the sample rotates around its own axis under the drive of the rotating table assembly to simulate the tangential motion state of the fan blade in the actual operation process. The device can stably simulate the rain erosion, wind-sand erosion and their combined effect of the fan blade.

This utility model belongs to the field of graphite material production technology, and discloses an enhanced cooling device and waste heat recovery system for graphitization kilns. The enhanced cooling device for graphitization kilns includes a material storage and cooling component, a heat exchange component, an air supply component, and a solid-gas separation component. The material storage and cooling component includes a material storage module and a cooling module. The material storage module stores and supplies heat exchange particles, and the cooling module cools the heat exchange particles. The heat exchange component includes a movable heat exchange module. The air supply component receives the heat exchange particles from the material storage module and can generate airflow to drive the heat exchange particles to form a gas-solid fluid flow through the heat exchange module. The solid-gas separation component separates the heat exchange particles in the gas-solid fluid so that the heat exchange particles enter the material storage module. By transporting the heat exchange particles into the heat exchange module for heat exchange with the graphitization kiln, the cooling cycle is shortened, production efficiency is improved, and the movable heat exchange module reduces the difficulty of implementation.

The utility model discloses a novel red mud desulfurization and denitrification process device, including boiling bed flue gas desulfurization and denitrification tower, spiral heating feeder, red mud feed buffer tank, cyclone separator, cloth bag dust collector and spiral returner, this technology takes red mud as desulfurization and denitrification agent, and the red mud enters boiling bed flue gas desulfurization and denitrification tower after heating and drying, and is fully contacted with flue gas under fluidized state, and the high efficient removal of NO x 、SO x In flue gas in red mud is utilized, and red mud desalination stabilization is realized simultaneously. After reaction, flue gas is separated and dusted to reach standard discharge, and the red mud that is not completely reacted can be recycled or discharged as resources. By strengthening gas-solid mass transfer, reaction efficiency is improved, desulfurization, denitrification and particulate matter removal integration are realized, and the utility model is suitable for industrial flue gas treatment of surrounding alumina plant or red mud yard, and has environmental protection and resource recycling benefits.

This invention discloses a flow-type gas-phase carbonization apparatus and method for preparing monodisperse nano-tungsten carbide, comprising five main units: raw material supply, carbon source heating and decomposition, gas-phase reaction, cooling and collection, and waste heat utilization. The raw material supply unit includes a hopper, a screw feeder, a motor, a methane cylinder, and an argon source; the carbon source heating and decomposition unit includes a heating chamber fitted at the outlet end of the screw feeder and an external tubular furnace; the gas-phase reaction unit includes a reduction reactor and a Venturi tube, with guide plates evenly distributed axially on the inner wall of the reduction reactor; the cooling and collection unit includes a gas-solid separation device, a water cooling device, and a water-gas separation device; the waste heat utilization unit connects the combustion chamber inlet to the water-gas separation device outlet and the air inlet. The methane pipeline and the middle section of the screw feeder pass through the combustion chamber heating zone before entering the heating chamber, utilizing the waste heat from waste gas combustion to preheat the raw materials. This invention achieves molecular-level reactions through synergistic regulation, combined with waste heat recovery, balancing high-purity preparation with low-carbon production.

This utility model discloses a cyclone separator for a biomass circulating fluidized bed boiler, comprising a flue gas inlet section, a gas-solid two-phase separation section connected to the flue gas inlet section, a flue gas outlet section connected to the top and bottom of the gas-solid two-phase separation section respectively, and a solid return section. The solid return section includes multiple coaxially connected and fixedly connected solid return straight sections and multiple solid return conical sections, which are arranged at intervals in the vertical direction. Flue gas flows in from the flue gas inlet section, rotates along the inner wall of the gas-solid two-phase separation section, and achieves gas-solid two-phase separation through centrifugal force. The gas phase flows out through the flue gas outlet section, and the solid phase is returned from top to bottom through the solid return section. Through segmented and optimized solid return path and gas-solid separation flow field, the intermittent blockage problem caused by alkali metal adhesion in traditional cyclone separators is solved, avoiding forced boiler load reduction or shutdown. It is especially suitable for biomass combustion scenarios with complex fuel types and variable ash composition.