31 results about "Fluidized bed combustion" patented technology

The invention discloses a circulating fluidized bed combustion reduced-order prediction method based on enhanced compressed sensing and a time convolutional neural network. In the off-line preparation stage, firstly, original variable information in a multi-phase combustion field is obtained, the time average value of grid variables is calculated, and a result snapshot matrix is decentralized in time; and obtaining a POD mode and a corresponding mode coefficient thereof, and obtaining the optimal arrangement positions of the time convolutional neural network and the sensor. In the online prediction stage, the modal coefficient at the current moment is reconstructed based on the position of the sensor, the future modal coefficient is predicted based on the time convolutional neural network, and the flow field is reconstructed through linear combination with the POD modal. According to the method, on-line rapid prediction of full-field variables at the future moment is realized by utilizing sparse sensor data at the current moment, the defect that a traditional CFD method cannot be applied to industrial production rapid prediction is overcome, and the blank of multiphase combustion in the circulating fluidized bed in the aspect of on-line flow field rapid prediction is filled.

The invention provides a fluidized bed combustion system and a combustion method. The fluidized bed combustion system comprises a fluidized bed combustion reaction device and a mild gasification reaction device, the fluidized bed combustion reaction device comprises a dilute-phase region arranged in the middle and a dense-phase region arranged at the lower part; a gas phase outlet of the mild gasification reaction device is connected with a gas phase inlet of the dilute phase zone, and a solid phase outlet of the mild gasification reaction device is connected with a solid phase inlet of the dense phase zone. The system is stable in combustion, high in denitration efficiency, compact in structure, easy and convenient to operate, low in operation cost and suitable for low-nitrogen transformation and new projects of coal and biomass combustion devices, and has good industrial application prospects and popularization value.

The invention relates to the technical field of soil remediation materials, in particular to a degradable soil stabilizer and a preparation method thereof. The degradable soil stabilizer provided by the invention comprises the following components: phosphate grafted graphene oxide, polylactic acid, Portland cement, fluidized bed combustion ash, a composite anti-freezing agent, a silane coupling agent and the balance of soil, the mass percent of each component is as follows: 0.5%-3% of phosphate grafted graphene oxide, 2%-5% of polylactic acid, 25%-40% of Portland cement, 10%-15% of fluidized bed combustion ash, 1%-3% of a composite anti-freezing agent and 0.3%-1% of a silane coupling agent. The degradable soil stabilizer disclosed by the invention has the effect of simultaneously improving the compressive strength and the degradability of the soil stabilizer.

This invention provides a computer program, an information processing method, and an information processing device for detailed observation of the inside of a bubbling fluidized bed combustion furnace. [Solution] The computer program acquires images of the inside of a bubbling fluidized bed combustion furnace using an infrared camera, generates a brightness distribution inside the bubbling fluidized bed combustion furnace and a velocity vector distribution representing the distribution of velocity vectors of moving objects inside the bubbling fluidized bed combustion furnace based on the images, and causes the computer to execute a process to output analysis results based on the brightness distribution and the velocity vector distribution.

The invention relates to a device and method for producing synthesis gas by gasifying fluidized bed gasification slag or CFB gasification fly ash, and belongs to the field of chemical synthesis gas. A circulating fluidized bed combustion chamber (1) is connected to a high-efficiency cyclone separator (3), the lower part of the high-efficiency cyclone separator (3) is connected to a fluidized bed gasification furnace (2), and the lower part of the fluidized bed gasification furnace (2) is connected to the circulating fluidized bed combustion chamber (1); the top of the high-efficiency cyclone separator (3) is connected to a superheater (4), an evaporator (5), an economizer (6), an air preheater (7) and an exhaust gas treatment device (8) in sequence; the synthesis gas outlet of the fluidized bed gasification furnace (2) is connected to a high-efficiency cyclone separator (9), the lower part of the high-efficiency cyclone separator (9) is connected to the fluidized bed gasification furnace (2), and the top of the high-efficiency cyclone separator (9) is connected to a evaporator (10), an air preheater (12) and a synthesis gas purification device (15) in sequence, and then hydrogen-rich synthesis gas is transported outward. The present invention can realize the preparation of hydrogen-rich synthesis gas by gasifying slag from an entrained flow bed or gasifying fly ash from a CFB gasification bed, thereby achieving high-value utilization.

To provide a fluid bed combustion system which has a high mixing / stirring function and further improves classification performance.SOLUTION: A rotary classifier according to one aspect includes: a rotary shaft extending along a horizontal direction; a cylindrical screen configured to rotate around a center line of the rotary shaft and transport a fluid medium; and an internal stirring plate supported at the rotary shaft side or the screen side. The internal stirring plate includes a second strip plate connected to a first strip plate. On a cross section orthogonal to the center line of the rotary shaft, the first strip plate extends along a radial direction of the screen and the second strip plate extends along a direction orthogonal to the radial direction of the screen. An inner first long side, located at the inner side in the radial direction of the screen, of a pair of first long sides is connected to the second strip plate or an upstream side second long side, located at the upstream side in a rotation direction, of a pair of second long sides is connected to the first strip plate.SELECTED DRAWING: Figure 3

This invention relates to the field of fluidized bed burner technology and discloses a biomass fuel energy-saving burner based on fluidized bed technology, including a wind circulation assembly. The wind circulation assembly includes a sealed outer shell, an air supply assembly fixedly connected to the inner side of the bottom of the sealed outer shell, a fuel tank fixedly sleeved on the inner side of one end of the sealed outer shell, a guide plate fixedly connected to the top of the front of the fuel tank, a fluidization assembly fixedly installed on the inner side of the bottom of the fuel tank, a combustion chamber assembly fixedly sleeved on one end of the sealed outer shell, and an ash removal assembly fixedly connected to one side of the combustion chamber assembly. The fluidization assembly fluidizes the fuel in the fuel tank, and the air supply assembly, under the action of the sealed outer shell and the guide plate, forms a wind circulation to discharge coke and promote combustion. This solves the problem that the coke produced by fuel combustion is often mixed with the fuel itself, resulting in incomplete combustion and low combustion efficiency.

This invention relates to the field of fluidized bed combustion technology, and more particularly to a method and system for optimizing combustion in a circulating fluidized bed. This application involves real-time acquisition of bed pressure differential and temperature signals from multiple monitoring points above the air distribution plate. A multi-dimensional fluidization state feature vector is extracted for each monitoring point. Based on the feature vectors and spatial locations of each monitoring point, all monitoring points are dynamically clustered into one or more virtual zones. For each virtual zone, a prediction model is established using its feature vector, and a target airflow is calculated, thereby adjusting the airflow distribution of each virtual zone. This application transforms fixed physical zones into dynamic virtual zones, enabling real-time adaptation to changes in fuel type, load, and bed material characteristics. This alleviates problems of poor local fluidization or excessive airflow when deviating from design conditions, thereby improving airflow uniformity and combustion efficiency.

The invention provides a compound combustion device and method for fuel decoupling staged micro-fluidization grate-firing. The compound combustion device comprises a grate-firing furnace and a pyrolysis reactor. The fuel decoupling classification refers to that fine coal particles are converted into pyrolysis gas and high-temperature semi-coke through a cyclone pyrolysis reactor, the pyrolysis gas is introduced from the upper part of a main hearth to be used for reducing nitrogen oxide generated by combustion of a coal bed in a bed layer area, and the high-temperature semi-coke is conveyed to the upper surface of a bed layer through a pipeline to assist in igniting the coal bed; micro-fluidized bed combustion refers to that particle size distribution coal distribution is combined with primary air middle-front part air distribution, fine-particle coal in a bed layer is in a micro-fluidized combustion state in gaps of large-particle coal, combustion and burnout of a bed layer coal sample are enhanced, and the carbon content of bottom slag is reduced; the three-hearth structural design is adopted, fly ash return is coupled, fluidized fly ash and gas-phase components are intensified to be burnt out, and then the carbon content of the fly ash is reduced; through the layer combustion-chamber combustion combined combustion method, the incomplete combustion heat loss of the layer combustion furnace can be effectively reduced, the boiler efficiency is improved, and the original emission of nitrogen oxide is reduced.

The invention discloses a preparation method of modified circulating fluidized bed combustion ash, an in-situ polymerizable sludge curing material and a preparation method thereof. The preparation method of the modified circulating fluidized bed combustion ash comprises the following steps: mixing the circulating fluidized bed combustion ash with an acid solution, stirring, drying, performing vacuum suction to remove air, injecting a potassium persulfate solution under a negative pressure condition, drying again to obtain circulating fluidized bed combustion ash particles loaded with potassium persulfate, mixing the circulating fluidized bed combustion ash particles with an acrylic emulsion, and curing and coating to form a film. The curing material is prepared from the following components in parts by mass: 126 to 400 parts of sludge, 56 to 84 parts of silicon-calcium slag, 24 to 36 parts of modified circulating fluidized bed combustion ash, 10 to 20 parts of gypsum, 7 to 24 parts of water glass, 4 to 7 parts of sodium hydroxide, 35 to 44 parts of water, 4 to 8 parts of acrylamide and 0.025 to 0.08 part of N, N '-methylene bisacrylamide. The material toughness can be improved, and the problems that solidified soil is large in brittleness and prone to cracking are solved.

This invention provides a production process for the tiered utilization and comprehensive conversion of low-calorific-value anthracite. It employs a precise separation technology combining heavy media separation and jigging to separate the low-calorific-value anthracite into three grades of coal and washed gangue. Grade I coal undergoes deep deashing, segmented heat treatment, and phosphorus doping modification to prepare lithium-ion battery anode materials. Grade II coal is processed using a low-temperature activation process with a composite activator to prepare high-end activated carbon. Grade III coal is processed using a solvent extraction-chemical modification route to prepare carbon-based new materials. The washed gangue is used for circulating fluidized bed combustion power generation. Simultaneously, a wastewater, waste gas, and solid waste co-treatment system is established. This invention can improve the comprehensive utilization rate of resources, reduce pollutant emissions, achieve clean, high-value, and zero-waste utilization throughout the entire process, and form a coal-carbon materials-new energy industrial chain. It yields significant economic and environmental benefits and is suitable for regions rich in low-calorific-value anthracite resources.

The utility model relates to the technical field of combustion experiment equipment, in particular to a high-temperature corrosion experiment device for a fluidized bed combustion furnace. A furnace tube insulating layer is arranged on the periphery of a vertical furnace tube, an auxiliary heating wire is wound on the furnace tube and located between the furnace tube and the furnace tube insulating layer, an upper cover flange and an air supply tube are arranged at the upper end and the lower end of the furnace tube respectively, an upper cover insulating layer is arranged at the top of the upper cover flange, a quartz sand layer is arranged at the bottom of an inner cavity of the furnace tube, and a bottom plate flange is mounted at the lower end of the air supply tube; the middle part and the upper part of the inner cavity of the furnace tube are respectively provided with a horizontal 1 # sample hanging rod and a 2 # sample hanging rod; the lower part of the side surface of the furnace tube is provided with a spiral pulverized coal feeding tank communicated with the inner cavity of the furnace tube; the device can ensure the heat preservation and heating effects of the inner cavity of the furnace tube and improve the efficiency, and is used for simulating the high-temperature corrosion environment of a coal-fired power plant and realizing accurate regulation and control of parameters.

A classification device that can prevent the structure of the classification device from becoming complicated and large in size, and a fluidized bed combustion system equipped with the classification device are provided. [Solution] The classification device is used to remove foreign matter from a fluidized medium extracted from a fluidized bed combustion device, and comprises an upstream classifier configured to remove small foreign matter smaller than the lower limit value of the fluidized medium from the fluidized medium, and a downstream classifier integrally provided with the upstream classifier, configured to remove large foreign matter larger than the upper limit value of the fluidized medium from the fluidized medium from which small foreign matter has been removed by the upstream classifier.

The invention discloses an intelligent clean biomass fluidized bed combustion furnace and method, and relates to the technical field of fluidized bed combustion furnaces, the intelligent clean biomass fluidized bed combustion furnace comprises a combustion boiler and a flue gas discharge bin, the combustion boiler is provided with an exhaust pipe and a feed pipe, the inner part of the flue gas discharge bin comprises two cavities, a through hole is formed between the two cavities, and the through hole is communicated with the exhaust pipe. The flue gas emission bin is fixedly connected with an exhaust pipe of a combustion boiler, the flue gas emission bin comprises a material conveying channel, the material conveying channel fixedly penetrates through the inner wall and the outer wall of the flue gas emission bin, the material conveying channel is fixedly connected with a feeding pipe of the combustion boiler, and a temperature sensor is arranged on the surface of the material conveying channel and used for monitoring the temperature; by arranging a round block, dust particles are effectively prevented from entering the heat conduction frame and being accumulated on the contact face of the heat conduction frame and the heat conduction rod, and therefore the long-term stable heat conduction efficiency is maintained.

The invention discloses a household garbage coupling coal-fired boiler power generation system and method. The household garbage coupling coal-fired boiler power generation system comprises a boiler body, a fluidized bed combustion chamber, a household garbage pyrolysis chamber, a first cyclone separator and a second cyclone separator. A heat carrier separated from the first cyclone separator is fed into the household garbage pyrolysis chamber, high-temperature flue gas leaving the top of the first cyclone separator enters the boiler body for heat recovery, household garbage materials are evenly mixed with the heat carrier in the household garbage pyrolysis chamber due to rotational motion, high-temperature combustible gas is generated after pyrolysis, and the high-temperature combustible gas is discharged from the boiler body. Generated high-temperature combustible gas passes through a second cyclone separator and then enters a position between a pulverized coal nozzle of the boiler body and an over-fire air position to be combusted; domestic garbage materials are rapidly heated in the process of being mixed with the high-temperature heat carrier in the domestic garbage pyrolysis chamber to generate pyrolysis reaction, combustible volatile component gas is generated, and part of solid product coke or semicoke, the circulating heat carrier after heat release and coke or semicoke particles serving as pyrolysis products are also generated.

The utility model provides a hearth anti-coking structure of a biomass fluidized bed combustion boiler and the biomass fluidized bed combustion boiler. The hearth anti-coking structure comprises a hearth, the bed material layer is arranged at the bottom of the hearth; the cooling water tank is arranged below the bed material layer, the top of the cooling water tank is attached to the bed material layer, and the cooling water tank is used for being filled with flowing cooling liquid to cool the bed material layer; the air distribution plate is arranged below the cooling water tank, and a plurality of air guide holes are formed in the air distribution plate; the air caps penetrate through the cooling water tank and are communicated with the air guide holes in the air distribution plate; and a ventilation hole is formed in the top of the air cap, and the air cap is used for blowing combustion-supporting air conveyed through the air guide hole to the bed material layer through the ventilation hole. According to the utility model, the cooling water tank filled with the flowing cooling liquid is arranged at the bottom of the hearth of the biomass fluidized bed furnace, so that the surface temperature of the hearth material layer is reduced, and the phenomena of melting and coking caused by local temperature rise of the hearth material layer of the biomass fluidized bed furnace and worsening of the cooling condition due to dust particle turnover can be prevented and reduced.

The invention discloses an anti-slagging control method for a coal slime circulating fluidized bed, and relates to the field of combustion of the coal slime circulating fluidized bed, which comprises the following steps: S1, data acquisition: monitoring the interior of the CFB by using a high-precision temperature sensor, a pressure sensor, an oxygen analyzer, a microwave material concentration sensor and a laser particle size analyzer; the method comprises the steps of S1, building a prediction model, S2, utilizing training and prediction learning of a vector machine (SVM) algorithm model machine to recognize potential slagging risks in advance, S3, optimizing combustion conditions, S4, carrying out a slag removal program, S5, carrying out data analysis, S6, carrying out equipment maintenance and S7, carrying out multi-system linkage coordination. According to the method, through data acquisition, prediction model establishment, combustion condition optimization, real-time monitoring and dynamic combustion parameter adjustment, the problem of unstable combustion caused by slagging is effectively avoided, it is ensured that the CFB can stably operate under various working conditions, the energy utilization efficiency is improved, and the frequency of slagging events in the CFB operation period can be greatly reduced.

This fluid medium regeneration device of a fluidized bed is provided with a cooling unit in which, at least, a fluid medium recovered from the fluidized bed of a fluidized bed combustion furnace is supplied, the fluid medium is cooled through contact with a liquid medium that has a boiling point of less than or equal to -20°C at 1 atm, and a coating layer is separated from the fluid medium.

The invention provides geopolymer improved granite residual soil as well as a preparation method and application thereof, and belongs to the technical field of geopolymer materials. The geopolymer improved granite residual soil comprises granite residual soil, a gel material and a carbonate alkali activator, the mixing amount of the gel material is 10-20% of the total mass of improved dry soil, the mass of equivalent Na2O generated by the carbonate alkali activator is 2.5-6.5% of the mass of the gel material, and the content of the equivalent Na2O generated by the carbonate alkali activator is 10-20% of the total mass of the granite residual soil. The gel material comprises the following components in parts by weight: 35-50 parts of glass superfine powder, 20-40 parts of petroleum refining deactivated catalyst powder and 10-35 parts of circulating fluidized bed combustion ash. The composite system reacts to generate an interpenetrating gel network and a compact pore structure, saltpetering of the material can be inhibited, long-term stabilization of heavy metal is realized, and freeze-thaw resistance, dynamic load fatigue resistance and dry-wet cycle resistance of the material are remarkably improved.

The invention provides a chemical-looping combustion boiler system and a using method for solving the problems that a traditional boiler is large in carbon emission amount, high in carbon reduction cost and the like. The boiler system comprises an oxidation reaction chamber, a reduction reaction chamber, a parallel flue, an internal adjustment type heat balance system and the like, and the rapid fluidized bed combustion system composed of the steam-water cooling type oxidation reaction chamber and the heat insulation type reduction reaction chamber has high reaction efficiency, safety and reliability. The thermodynamic system formed by the heating surfaces in the parallel flues and the internal adjustment type heat balance system has operation independence and collaboration and has adjustment and control flexibility; the using method comprises the steps of ignition starting, adjustment control, flue gas treatment and the like, and is detailed in content and high in operability. The fuel combustion process is decomposed through the chemical looping combustion technology, N2 and CO2 in exhausted smoke are separated, the purity of CO2 is improved, and conditions are created for efficient and low-cost carbon reduction and emission reduction of a boiler through the CCUS technology.

The application discloses a kind of intelligent clean biomass fluidized bed combustion furnace and method, it is related to fluidized bed combustion furnace technical field, including combustion boiler and flue gas discharging bin, the exhaust pipe and feed pipe are arranged on the combustion boiler, the inside of the flue gas discharging bin includes two chambers, through hole is opened between two described chambers, the exhaust pipe of the flue gas discharging bin and combustion boiler fixed connection, including: material conveying channel, the inner and outer wall of flue gas discharging bin is fixedly penetrated in the material conveying channel, the material conveying channel and the feed pipe of combustion boiler fixed connection, the surface of the material conveying channel is provided with temperature sensor, and the temperature sensor is used for monitoring temperature;By setting round block, effectively prevent dust particles from entering the inside of heat conducting frame, prevent dust particles from being accumulated on the contact surface of heat conducting frame and heat conducting rod, so as to maintain long-term stable heat conduction efficiency.

The present application relates to circulating fluidized bed combustion, gasification, chemical reaction equipment manufacturing and operation technical field, aims at solving the problems of material flow dead zone, poor dredging accuracy, high ventilation energy consumption, unstable system operation and lack of automatic regulation, provides a low energy consumption, high stability circulating fluidized bed return material system and its control method, containing downcomer, down curve channel, horizontal section, rising channel, also set air distribution device, loose air, pressure monitoring and control system; The pressure monitoring system is provided with a plurality of pressure measuring points at different heights of the downcomer, the control system is electrically connected with the former two and adjusts the loose air volume according to the pressure data. The control method determines the material flow condition by collecting data, automatically controls the opening and closing of the air distribution and loose air regulating valve, and realizes real-time monitoring and automatic pressure relief control of the high-pressure fan. The present application has the advantages of stable material flow, no dead zone, accurate air distribution and low energy consumption, stable system operation, intelligent control and self-adaptation.

The invention relates to the technical field of coal development and utilization, and discloses a coal gasification filter cake different-density circulating fluidized bed combustion system which comprises a gasification filter cake bin (1), a screw feeder (2), a plunger pump (3), a crusher (4), a pneumatic spreading device (5), a circulating fluidized bed (7), a gas-solid separator (8), a heating surface (9), an air preheater (10), an induced draft fan (12) and a chimney (13) which are sequentially connected. A coal feeder (6) is further arranged on the lower portion of the circulating fluidized bed (7), and the hot air outlet end of the air preheater (10) is connected with an air inlet in the lower end of the circulating fluidized bed (7) and the air inlet end of the pneumatic material spreading device (5). The coal gasification filter cake different-density circulating fluidized bed combustion system is simple in structure, convenient to use and operate and good in use effect.

The utility model discloses a water-cooled wall sealing housing. The utility model belongs to the technical field of circulating fluidized bed combustion. A water-cooled wall sealing housing comprises a water-cooled wall main body, the water-cooled wall main body is provided with an open hole, the water-cooled wall main body is provided with a sealing housing used for covering the open hole, the sealing housing comprises a plurality of groups of horizontal section housings and vertical section housings which are alternately connected, and a smooth transition section housing is arranged between any horizontal section housing and the correspondingly connected vertical section housing. According to the utility model, the smooth transition section shell is additionally arranged, so that the stress concentration of the corner part formed by the horizontal section shell and the vertical section shell of the sealing cover shell is reduced, the problems of cracking and leakage between the sealing cover shell and the water cooling wall main body are further reduced, and the reliability of a unit is improved.

A circulating fluidized bed fly ash heating furnace coupled with a fly ash melting device and method belongs to the field of harmless and resource-based treatment of fly ash from waste incineration. The flue gas outlet of the circulating fluidized bed combustion chamber is connected to a high-efficiency cyclone separator 1, the discharge port of which is connected to a return valve. The outlet on one side of the return valve is connected to the combustion chamber, while the outlet on the other side of the return valve is connected to a high-temperature melting furnace. The flue gas outlet of the high-efficiency cyclone separator 1 is connected to the second combustion chamber and the first waste heat boiler. The flue gas outlet of the high-temperature melting furnace is connected to the second waste heat boiler, which is connected to the second waste heat boiler. The flue gas outlet of the first waste heat boiler and the second waste heat boiler is connected to the second high-efficiency cyclone separator. The flue gas outlets of the first waste heat boiler and the second high-efficiency cyclone separator are connected to a quenching tower. The quenching tower flue gas outlet is connected to a bag filter, the flue gas cooling side of a flue gas-flue gas heater, a wet scrubber, the flue gas heating side of a flue gas-flue gas heater, a steam-flue gas heater, an SCR denitrification device, and the flue gas inlet of an economizer. The present invention is used for high-temperature melting of fly ash.

The utility model relates to the technical field of circulating fluidized beds, in particular to a roasting circulating fluidized bed combustion system. According to the technical scheme, the device comprises a hearth, a separator connected with the hearth, a flue communicated with the top of the separator and a post-treatment module connected with the flue, and further comprises a primary air inlet component and a secondary air inlet component which are installed in the hearth, and the primary air inlet component is located below the secondary air inlet component; the primary air inlet component and the secondary air inlet component each comprise a flow dividing ring fixedly installed in the hearth, a plurality of exhaust holes are formed in each flow dividing ring, and an airflow balance assembly for balancing the air output of the exhaust holes is installed in each flow dividing ring. The gas flow balancing assembly can reduce the gas flow passing through the exhaust holes close to the connector and can increase the gas flow passing through the exhaust holes far away from the connector, so that the difference of the gas flow passing through the exhaust holes can be effectively reduced, and the uniformity of gas in a hearth can be improved.

The invention discloses a supercritical carbon dioxide pressurized oxygen-enriched fluidized bed-SOEC peak regulation cogeneration system, which is characterized in that circulating flue gas of a pressurized oxygen-enriched circulating fluidized bed combustion mechanism for co-combustion of coal and biomass provides multiple times of heat exchange for a working medium of a supercritical carbon dioxide power generation mechanism; meanwhile, high-temperature flue gas rich in water vapor is pressurized to preheat electrolytic reactant water in the SOEC peak regulation cogeneration mechanism; one part of pure CO2 obtained by treating combustion products is used as a circulating working medium, the other part of the pure CO2 is used as another electrolytic reactant, oxygen generated by co-electrolysis can provide an oxygen source for combustion, and generated hydrocarbon substances are used as chemicals or fuels; the SOEC and the supercritical carbon dioxide power generation mechanism realize the targets of flexible start and stop and peak and frequency regulation under the background of power grid load change. According to the system, the pressurized oxygen-enriched fluidized bed, supercritical carbon dioxide circulation and SOEC peak regulation are integrated, efficient power generation, carbon emission reduction and energy storage peak regulation are considered, and the overall benefit of an energy system is improved.

The utility model provides multi-stage circulating fluidized bed combustion equipment. The multi-stage circulating fluidized bed combustion equipment comprises a primary fan, a secondary fan, a secondary air stage distribution pipe, a first-stage constant feeder, a second-stage constant feeder, a first-stage return feeder, a second-stage return feeder, a main combustion chamber, an auxiliary combustion chamber, a burnout chamber and a cyclone separator, wherein the main combustion chamber, the auxiliary combustion chamber, the burnout chamber and the cyclone separator are communicated in sequence; the first-stage constant feeder and the second-stage constant feeder are sequentially arranged at the front part of the main combustion chamber from bottom to top; the first-stage constant feeder and the second-stage constant feeder are both communicated with the main combustion chamber; the primary return feeder is arranged below the auxiliary combustion chamber and the after-combustion chamber; the main combustion chamber, the auxiliary combustion chamber and the burnout chamber are all communicated with the first-stage return feeder, and the second-stage return feeder is communicated with the cyclone separator and the main combustion chamber. A heat flow meter sensor is arranged on a water cooling wall of the main combustion chamber; an anti-blocking pitot tube is arranged on a pipeline between the cyclone separator and the main combustion chamber; the multi-stage circulating fluidized bed combustion equipment is reliable in structure, and combustion efficiency can be improved and original generation of NOx can be reduced.

The utility model discloses a boiler hood which comprises an air supply pipe and a ceramic hood body, a positioning ring is arranged on the side wall of the lower portion of the air supply pipe, a pressing and abutting table matched with the positioning ring is arranged on the inner wall of the lower end of the ceramic hood body, the upper end of the air supply pipe is inserted into the ceramic hood body and is in threaded connection with the upper end of the ceramic hood body, and a plurality of air outlet holes are formed in the side wall of the lower portion of the ceramic hood body. A plurality of air supply holes are formed in the side wall of the air supply pipe. The air cap has the advantages that the air cap is made of wear-resistant ceramic materials, the wear resistance of the air cap is improved, the service life is prolonged, coal consumption can be reduced, combustion of the fluidized bed is stabilized, generation of NOx and SOx can be effectively controlled, and the heat efficiency of the boiler is improved. Meanwhile, the positioning ring is arranged on the side wall of the air supply pipe, the pressing and abutting table matched with the ceramic air cap is arranged at the lower end of the ceramic air cap to achieve tight contact of the air supply pipe and the ceramic air cap, the upper end of the ceramic air cap is fixed in a threaded connection mode, disassembly and assembly are more convenient and faster, the ceramic air cap can be independently replaced during maintenance, and maintenance cost is low.

The invention relates to the technical field of fluidized bed combustors, and discloses a biomass fuel energy-saving combustor based on a fluidized bed technology, which comprises a wind power circulation assembly, the wind power circulation assembly comprises a sealed shell, and the inner side of the bottom of the sealed shell is fixedly connected with an air supply assembly; a fuel tank is fixedly connected to the inner side of one end of the sealing shell in a sleeving mode, a flow guide plate is fixedly connected to the top of the front face of the fuel tank, a fluidization assembly is fixedly installed on the inner side of the bottom of the fuel tank, a combustion chamber assembly is fixedly connected to one end of the sealing shell in a sleeving mode, and an ash discharging assembly is fixedly connected to one side of the combustion chamber assembly. The fluidization assembly fluidizes fuel in the fuel tank, the air supply assembly forms wind circulation under the action of the sealing shell and the flow guide plate to discharge coke to promote combustion, and the problem that the combustion efficiency is low due to the fact that the coke generated by fuel combustion is often mixed with the fuel and combustion is insufficient is solved.