17 results about "Bubbling fluidized bed" patented technology

The invention discloses a megawatt pressurized bubbling fluidized bed oxygen-enriched combustion test platform and a combustion method. The platform comprises a feeding system, a pressure swing adsorption oxygen production and gas inlet system, a deslagging system, an oxygen-enriched combustion reaction system and a flue gas and fly ash sampling treatment system. The feeding system adopts a spiral and star-shaped double-path independent pressure feeding unit, and is provided with a multi-stage stock bin, a drying device and a pipeline cooling structure, so that pressurized continuous feeding is realized, and tempering is prevented; the pressure swing adsorption oxygen generation and gas inlet system generates oxygen-enriched gas through a PSA technology, and the oxygen-enriched gas is mixed with CO2 to form a graded oxygen-enriched atmosphere; according to the oxygen-enriched combustion reaction system, accurate temperature control is achieved through an air distribution plate, a reducer pipe and a partition heat exchange device, and generation of NOx is restrained; the problems of unstable fuel supply, unreliable deslagging, low combustion efficiency, difficulty in CO2 enrichment and the like under the high-pressure oxygen-enriched combustion condition in the prior art can be effectively solved.

The invention belongs to the field of catalytic processes. In particular, the present invention relates to a thermocatalytic cracking process for the preparation of low molecular weight monocyclic aromatic compounds. According to the present invention there is provided a thermocatalytic cracking process for preparing a low molecular weight monocyclic aromatic compound from a feed stream comprising biomass and / or one or more polymers, the process comprising the steps of: a) subjecting the feed stream comprising biomass and / or one or more polymers to a pyrolysis treatment at a pyrolysis temperature to produce a pyrolysis steam; b) optionally cooling or heating the pyrolysis steam; c) contacting the pyrolysis steam with an aromatization catalyst at an aromatization temperature in a catalytic conversion step to produce a conversion product comprising low molecular weight aromatics, and d) optionally recovering low molecular weight monocyclic aromatics from the conversion product, the catalytic conversion step c) being carried out in a stationary or bubbling fluidized bed reactor.

The utility model discloses a fluidization gasification - pyrolysis conveying coupling's reaction unit, including air chamber, cloth air distribution board, bubbling fluidized bed reactor, transition section, conveyor I, screw feeder, conveyor II and gasification furnace, the material outlet of screw feeder is connected with the one side end of bubbling fluidized bed reactor, and the other side end of bubbling fluidized bed reactor is connected with conveyor I through conveyor II, and the bottom of bubbling fluidized bed reactor is connected with the top of air chamber, and cloth air distribution board sets up between bubbling fluidized bed reactor and air chamber, and the top of bubbling fluidized bed reactor is connected with conveyor I through transition section, and the end of conveyor I is in communication with the inlet of gasification furnace. Through the coupling of two section conveyors, realize half -coke granule pyrolysis conveying integration, have both the advantage that bubbling fluidized bed granule stays long, gas -solid contact is sufficient, and have the advantage that external circulation flow rate is high, and half -coke granule pyrolysis is sufficient, provide the support for the efficient gasification of subsequent gasification furnace.

This invention provides a method for producing hot-pressed iron blocks from laterite nickel ore hydrometallurgical slag, belonging to the field of laterite nickel ore hydrometallurgical slag utilization technology. The process includes the following steps: S1, pressure filtration and water removal, reducing the moisture content of the wet slag to ≤30%; S2, drying and crushing, reducing the moisture content of the dried slag to ≤5%; S3, preheating, decrystallization, sulfate decomposition, and desulfurization, generating SO2 gas and hot-roasted sand containing oxides such as Fe2O3, Fe3O4, and CaO; S4, the hot-roasted sand is reduced in a multi-stage fluidized bed consisting of a second-stage pre-reduction fluidized bed and a third-stage final reduction horizontal bubbling fluidized bed, using H2 as the reducing agent. After reduction in the second and third-stage reduction fluidized beds, the degree of reduction reaches 65-85% and the metallization rate is >93%, respectively; S5, the reduced iron powder from the third-stage final reduction horizontal bubbling fluidized bed is processed into hot-pressed iron blocks by a hot-pressing device. The purified high-temperature flue gas is then recycled in the burner of a flash heater, thus utilizing the wet smelting slag of laterite nickel ore.

This application relates to a catalytic cracking coke generator, a regeneration system, and a regeneration method. The coke generator, from bottom to top, includes a pre-lifting zone, a reaction zone (either a bubbling fluidized bed or a turbulent fluidized bed), and an outlet zone. The pre-lifting zone is connected to the bottom of the reaction zone and the regenerator, while the top of the reaction zone is connected to the outlet zone. At least one fuel oil inlet is provided at the outlet of the pre-lifting zone or at the bottom of the reaction zone. When the coke generator and system of this application are used in fluidized catalytic cracking reactions with high reaction heat, a coke source can be provided from the reaction system to the regenerator, solving the reaction heat balance problem without affecting the regeneration process and without damaging the physical and chemical properties of the catalyst.

The invention belongs to the technical field of grading treatment of wind driven generator blades, and particularly relates to a method and an integrated system for thermochemical grading treatment of waste wind driven generator blades. The integrated system comprises a spiral feeder, a gasification reactor bubbling fluidized bed gasification area, a gasification reactor lifting pipe reforming area, a cyclone separator, a heat exchanger, a bag-type dust collector, a matched gas conveying pipeline, a matched solid conveying pipeline and the like which are connected in sequence. The gasification reaction of the abandoned wind driven generator blade is decoupled into the gasification reaction and the reforming reaction, the solid product generates glass fiber powder, and the gas product realizes clean conversion of high-volatile organic matters into synthesis gas / fuel gas by enhancing the thermal cracking / oxidative cracking effect of organic macromolecules. And finally, stage treatment and resource utilization of the abandoned wind driven generator blades are achieved.

The utility model provides a bubbling fluidized bed thermochemical heat storage reactor, and relates to the technical field of energy storage. The device comprises a shielding layer, an electromagnetic induction coil layer and a heat storage reactor inner wall from outside to inside, and a cavity defined by the heat storage reactor inner wall is filled with thermochemical heat storage materials and induction heating particles which can be jointly fluidized. An air distribution device is arranged at the bottom of the cavity and communicated with the air chamber, and a gas outlet is formed in the top of the cavity. The induction heating particles heated by electromagnetic induction are used as a heat source, and the heat storage material is heated in the reactor cavity. The power regulation of electromagnetic induction heating is more sensitive, so that the temperature rise effect is fed back more quickly. And when the inner wall of the heat storage reactor is also made of a metal material, the heat storage reactor can become a heat source under the action of the electromagnetic induction coil layer, and high-temperature fluidizing air with a heating function is added, so that multiple heat sources are used for heating at the same time, and rapid input of high-power heat energy and efficient heat energy storage can be realized.

The invention relates to the technical field of ferrous metallurgy, in particular to a low-carbon zero-carbon ironmaking device and method.The low-carbon zero-carbon ironmaking device comprises a fluidized bed system and a smelting reduction furnace system, and the fluidized bed system comprises a fluidized bed feeding pipe, a fluidized bed discharging pipe, a fluidized bed air inlet and a fluidized bed air outlet; the fluidized bed system is a multi-stage fluidized bed or a multi-layer fluidized bed, when the fluidized bed system is the multi-stage fluidized bed, at least one stage of fluidized bed is a bubbling fluidized bed, and when the fluidized bed system is the multi-layer fluidized bed, at least one fluidized bed layer is a bubbling bed layer; the smelting reduction furnace system comprises at least one smelting reduction furnace; and the fluidized bed discharge pipe is connected with a solid material spray gun of the smelting reduction furnace. According to the device and the method, the carbon reducing agent and the hydrogen reducing agent can be simultaneously applied in any proportion, and the process requirements of the transition stage of carbon smelting and hydrogen smelting are met.

This invention discloses a multi-scale honeycomb structure Ti(C,N)-based cermet and its preparation method. The cermet has the following composition (mass fraction): Ti: 50.56~53.92, W: 1.96~2.04, Ta: 1.48~1.52, Nb: 1.87~1.93, Mo: 7.51~8.18, Ni: 11.91~16.23, C: 12.61~14.29, N: 6.93~7.06. The preparation method includes the following steps: (1) using Ti(C,N) as the base metal. (1) Using C,N), WC, TaC, NbC, Mo2C, Ni and graphite powder as raw materials, the mixture is prepared and ball-milled; (2) The mixed slurry is poured into a bubbling fluidized bed for fluidized drying to obtain mixed powder; (3) The mixed powder is pressed and sintered under vacuum to obtain multi-scale honeycomb structure Ti(C,N) based metal ceramic, which has good comprehensive mechanical properties; This method achieves multi-scale distribution of fine crystal agglomerates in the mixture by adjusting the drying process, and has the characteristics of low cost, simple process and easy industrialization.

This invention provides a method and apparatus for extracting heme iron based on a dual-membrane cascade and oxygen isolation protection, belonging to the field of biochemical separation and purification technology. The method first constructs a pneumatically suspended hemolytic environment, utilizing a metal sintered microporous distributor to generate a micron-sized inert bubble fluidized bed, achieving red blood cell disruption and deep deoxygenation under zero mechanical shear conditions, solving the molecular damage and oxidation problems caused by traditional processes. Then, a gas-liquid co-flow ultrafiltration mechanism is employed, introducing pulsed plug flow drive to physically peel off the protein gel layer on the membrane surface online, achieving dynamic anti-clogging and long-term stability in the macromolecular separation process. Finally, transmembrane partial pressure extraction is performed based on a reverse gas-scan nanofiltration model, distinguishing the migration paths of water molecules and dissolved oxygen, outputting a highly active concentrate and a closed-loop circulating gas flow. This invention effectively improves the extraction efficiency of the product Fe. 2+ Retention rate, purity, and continuity of industrial production.

The invention discloses a bubbling fluidized bed boiler capable of adjusting an air hole structure of a distribution plate, and belongs to the field of fluidized bed boilers. The bubbling fluidized bed boiler comprises a boiler body, the distribution plate is installed on the lower side in the boiler body, a plurality of circulation grooves are formed in the distribution plate, adjusting assemblies are installed in the circulation grooves, and rotating grooves are formed in the circulation grooves; the upper end of the rotating frame is fixedly provided with a blocking cap; the lower side of the distribution plate is provided with a connecting frame; the upper end of the connecting frame is fixedly provided with a plurality of connecting rods; one side of the lower end of the connecting frame is provided with a bolt in a penetrating manner, the bolt is rotatably connected with the connecting frame, and the upper side of the bolt is in threaded connection with the distribution plate; according to the fuel distribution device, the opening and closing degree of the circulation groove can be adjusted according to the size of fuel through the arranged adjusting assembly, so that the flow speed of gas flowing through the circulation groove can be adjusted, and meanwhile, the stability of fuel of different sizes during combustion is guaranteed.

This invention discloses a bubbling fluidized bed boiler with an adjustable distribution plate pore structure, belonging to the field of fluidized bed boilers. It includes a boiler body, with a distribution plate installed on the lower side inside the boiler body. Multiple flow channels are formed on the distribution plate, and an adjustment component is installed inside each flow channel. A rotating channel is formed inside each flow channel. The adjustment component includes a rotating frame rotatably connected to the rotating channel, with a stop cap fixedly installed at the upper end of the rotating frame. A connecting frame is installed on the lower side of the distribution plate, with multiple connecting rods fixedly installed at the upper end of the connecting frame. A bolt is threaded through one side of the lower end of the connecting frame, rotatably connected to the connecting frame, and its upper side is threadedly connected to the distribution plate. The bolt is used to adjust the distance between the connecting frame and the distribution plate. This invention, through its adjustment component, can adjust the opening and closing size of the flow channels according to the size of the fuel, thereby regulating the gas flow rate through the flow channels and ensuring the stability of combustion for fuels of different sizes.

The present invention provides a process for the hydropyrolysis of biomass, said process comprising the steps of contacting biomass with a hydropyrolysis catalyst in a bubbling fluidised bed reactor under a hydrogen atmosphere, wherein the hydropyrolysis catalyst is prepared by a process comprising the steps of impregnating a gamma alumina carrier with a first impregnation solution comprising a tungsten salt, drying the tungsten-impregnated carrier; then impregnating the dried tungsten-impregnated carrier with a second impregnation solution comprising a source of a metal selected from those in groups 8, 9 and 10 of the periodic table, and, optionally, a molybdenum source, drying the fully impregnated carrier and then calcining it.

This invention discloses a bubbling fluidized bed boiler for burning biomass fuel, belonging to the field of boiler technology. It includes a boiler body with a wind chamber and air ducts fixedly installed on it. This design uses a filter plate to allow the combusted slag to enter the discharge chamber. The slag preheats the airflow within the wind chamber, thus utilizing the preheated slag. The wind chamber design prevents the slag from combining with the airflow, which would affect the fluidization effect of the bed material. When slag needs to be discharged from the discharge chamber, the operator starts a motor, which drives an auger. During the auger's rotation, the slag moves towards the outside of the boiler body, achieving automatic slag discharge. This prevents the bed material from being mistakenly discharged and avoids the slag from re-contacting the airflow, thus improving the fluidization effect and enhancing the slag discharge efficiency.

The invention relates to the technical field of ferrous metallurgy, in particular to a particle size grading multi-layer bubbling fluidized bed and a direct steelmaking device. The fluidized bed comprises a gas distribution chamber and a plurality of fluidized bed layers from bottom to top, at least one of the fluidized bed layers is a bubbling bed layer, and the bubbling bed layer is a conical bed; the bottom fluidized bed layer is a cooling reduction bed layer, and the gas distribution chamber is provided with a low-temperature reducing gas inlet; the middle fluidized bed layers and the top fluidized bed layer are heating reduction bed layers, the heating reduction bed layers are divided into a fine particle bed layer and a coarse particle bed layer, and the fine particle bed layer is located above the coarse particle bed layer; except for the bottom fluidized bed layer, each fluidized bed layer is provided with a discharging pipe, the bottom fine particle bed layer is provided with a fine material discharging pipe, and the bottom fluidized bed layer is at least provided with a bottom discharging pipe. The cooling reduction bed layer is arranged, the temperature of DRI powder discharged from the fluidized bed is low, the iron grade can be directly improved after magnetic separation, direct steelmaking is achieved, and carbon emission in the whole steelmaking process is greatly reduced.

The invention belongs to the technical field of sludge pyrolysis, and discloses an efficient preparation method and application of sludge-based biochar for a soil conditioner. The method comprises the following steps: performing strip extrusion on municipal sludge, and cutting into particles; the particles are dried through sludge pyrolysis gas and incineration flue gas until the moisture content is 5-30 wt.%, then part of the sludge particles are fed into a fluidized bed incinerator to be combusted, and the flue gas enters a pyrolysis furnace to serve as fluidization carrier gas and a pyrolysis heat source of the other part of the sludge particles; and the sludge particles entering the bubbling fluidized bed pyrolyzing furnace are subjected to rapid pyrolysis in a low-oxygen environment at 700 DEG C to efficiently prepare the sludge-based biochar. Experimental tests show that under the action of optimized parameter and characteristic combination, the prepared sludge-based biochar has excellent physical properties, namely uniform particle size distribution, developed internal pore structure and heavy metal stabilization; the carbonization degree of the biochar is high, and the residual content of macromolecular organic matters is less than or equal to 10wt.%. Therefore, the risk of organic pollution and heavy metal pollution can be greatly reduced by improving the soil through the Zhuajiang.

The invention discloses a pebble coal combustion and utilization integrated desulfurization and dust removal system and a multi-pollutant cooperative treatment method thereof. The pebble coal combustion and utilization integrated desulfurization and dust removal system comprises a bubbling fluidized bed (1), a cyclone tower (2) and a dry powder desulfurizer injection device (3), wherein the cyclone tower (2) is used for performing centrifugal dust removal and secondary desulfurization on flue gas discharged by the bubbling fluidized bed (1), and the bubbling fluidized bed (1), the cyclone tower (2) and the dry powder desulfurizer injection device (3) are sequentially communicated; wherein the cyclone tower (2) comprises a tower body, a center stabilizing cone (21), a second ash hopper (22) and a second pneumatic ash discharge valve (23), the center stabilizing cone (21) is fixedly arranged in the tower body, the second ash hopper (22) is installed at the lower end of the tower body, and the second pneumatic ash discharge valve (23) is installed on the second ash hopper (22). Pollutant emission is reduced; and resource utilization is realized.