A biomass integrated gasification combustion device and process

Abstract

The present invention discloses a biomass integrated gasification combustion device and process, which relates to the technical field of biomass gasification. It includes a reaction furnace body, a feeding device located at the top of the reaction furnace body, a heating grate located below the reaction chamber in the reaction furnace body, a gas outlet located on the reaction furnace body and above the reaction chamber. An ash hopper is located below the heating grate. The feeding end of the ash hopper is located on one side of the advancing direction of the heating grate. An inclined screen is provided inside the ash hopper for screening biomass char and biomass ash. The inclined high end of the screen is located below the feeding end. The present invention integrates the biomass gasification combustion device and the heat exchange structure of the boiler, which can reduce the occupied space of subsequent process equipment, directly utilize the waste heat or combustion heat of biomass gasification combustion to heat the heat exchange structure of the boiler, and achieve the maximum utilization of energy.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass gasification, and particularly relates to a biomass integrated gasification combustion device and process. Background Art

[0002] Biomass gasification refers to that after the biomass raw materials are pressed into shapes or simply crushed and processed, they are sent into a gasification furnace, and under the condition of insufficient oxygen, pyrolysis, oxidation, reduction, and reforming reactions of the high polymers of the biomass occur to obtain gases such as CO, H2, and CH4, converting the solid raw materials with low calorific value into gaseous fuels with high calorific value. Then, using the biomass gasification system to provide fuel sources for industrial boilers can effectively solve the problems of low combustion efficiency and large pollution of existing industrial boilers.

[0003] Existing biomass gasification combustion devices and boiler combustion devices are different equipment, occupying a large area, and there is no report on integrating them into one. The solid residues generated after biomass gasification combustion include biomass charcoal and biomass ash. Among them, the biomass ash still has a relatively high temperature, and it is necessary to wait for it to cool naturally before the biomass ash can be recycled to produce by-products, resulting in waste of energy. Summary of the Invention

[0004] The purpose of the present invention is to provide a biomass integrated gasification combustion device and process to solve the problems existing in the background art.

[0005] The present invention achieves the above purpose through the following technical solutions:

[0006] A biomass integrated gasification combustion device includes a reaction furnace body, a feeding device located at the top of the reaction furnace body, a heating grate located below the reaction chamber in the reaction furnace body, and a gas outlet located on the reaction furnace body and above the reaction chamber.

[0007] An ash hopper is located below the heating grate. The feeding end of the ash hopper is located on one side of the advancing direction of the heating grate. An inclined screen is provided inside the ash hopper for screening biomass charcoal and biomass ash. The inclined high end of the screen is located below the feeding end.

[0008] A first heat exchange assembly is composed of a heat exchange tube bundle located below the screen in the ash hopper, and a water inlet header and a water outlet header located at both ends of the heat exchange tube bundle and outside the ash hopper. The water inlet header is located on one side of the inclined bottom end of the screen. The heat exchange tube bundle exchanges heat between the falling biomass ash and the liquid flowing inside the heat exchange tube bundle.

[0009] An ash auger is located below the heat exchange tube bundle for conveying the heat-exchanged biomass ash out of the reaction furnace body.

[0010] A further improvement is that a plurality of fixing plates for fixing the heat exchange tube bundle are provided on the heat exchange tube bundle, strip-shaped air flow channels are provided between the upper and lower adjacent heat exchange tubes inside the fixing plates, and outlets are provided on both sides of the air flow channels, the outlets are located on both sides of the fixing plates and the outlets face the heat exchange tubes, the air inlet ends of the plurality of air flow channels are connected to the air inlet through a vertical channel, and a pressure regulating valve is provided on the air inlet for controlling the air volume and wind speed.

[0011] A further improvement is that an eccentric wheel is provided below the inclined high end of the screen, and the eccentric wheel drives the screen to move upward when it rotates. An elastic member is provided below the inclined bottom end of the screen to provide buffering when the screen moves upward.

[0012] A further improvement is that a charcoal outlet is provided on one side of the inclined bottom end of the screen, which is used to clean the biomass charcoal on the screen when the machine is shut down.

[0013] A further improvement is that a water pump is provided at the water outlet end of the water outlet pipe box, and a transmission structure is provided at the driving end of the eccentric wheel. The transmission structure utilizes the pump flow generated by the water pump to drive the eccentric wheel to rotate. The transmission structure is composed of a driving wheel located at the driving end of the eccentric wheel, a liquid wheel located at the water inlet end of the water pump, and a transmission wheel connecting the driving wheel and the liquid wheel. The liquid wheel and the transmission wheel are connected by a transmission member, and the transmission wheel and the driving wheel are connected by a rotating shaft.

[0014] A further improvement is that the device also includes a second heat exchange component, the structure of the second heat exchange component is the same as that of the first heat exchange component, the water inlet pipe box of the second heat exchange component is connected to the water outlet pipe box of the first heat exchange component, the air flow channel in the fixed plate of the second heat exchange component is used to circulate nitrogen, and the water outlet end of the water outlet pipe box of the second heat exchange component is provided with a flow regulating valve.

[0015] A further improvement is that the device also includes a waste removal component, the air inlet end of the waste removal component is connected to one end of the gas outlet, the air outlet end of the waste removal component is connected to an external device, the waste removal component includes a tank body and a plurality of staggered baffles located at the top and bottom ends of the tank body, forming an S-shaped gas channel between the air inlet end and the air outlet end, a nozzle is provided at the top end of the tank body, the inlet of the nozzle is connected to one end of the flow regulating valve at the water outlet end of the second heat exchange component, and a liquid outlet is provided at the bottom end of the tank body.

[0016] A further improvement is that the bottom end of the tank body is in a semi-concave elliptical shape, and a liquid leakage hole is provided at the bottom of the baffle located at the bottom end of the tank body.

[0017] A biomass integrated gasification and combustion process, using the above-mentioned biomass integrated gasification and combustion device, comprises the following steps:

[0018] (1) Biomass enters the reaction chamber of the reaction furnace body from the feeding device. The biomass fuel to be gasified is heated by the heating grate, causing the biomass to gasify and burn in the reaction chamber. Among them, the solid residue of the biomass after gasification and combustion falls onto the heating grate and then into the ash chamber. After being screened by the sieve, biomass carbon and biomass ash are obtained. The biomass ash falls into the first heat exchange component, and the heat exchange tube bundle uses the falling biomass ash to exchange heat with the liquid flowing inside the heat exchange tube bundle. After heat exchange, the biomass ash falls into the ash auger and is removed from the device;

[0019] (2) The thermal decomposition of the biomass gasification combustion occurs and is converted into CO, H2, CH4 or other alkane gases, which are transported to the gas-using equipment through the gas outlet.

[0020] The beneficial effects of the present invention are as follows:

[0021] (1) Integrating the biomass gasification combustion device and the heat exchange structure of the boiler into one can reduce the occupied space of subsequent process equipment, directly utilize the waste heat or combustion heat of the biomass gasification combustion to heat the heat exchange structure of the boiler, and achieve the maximum utilization of energy;

[0022] (2) Utilize the waste heat of the biomass ash to heat the liquid in the first heat exchange component, and can also quickly cool down the biomass ash, then use the ash auger to remove it. At the same time, use the sieve to separate the biomass ash and biomass charcoal; use the air blown out from the air inlet in the air flow channel to replace the air blower of the traditional biomass gasifier to provide air for biomass gasification, and at the same time use this air to clean the biomass ash staying on the heat exchange tube bundle, and use this air to cool down the biomass charcoal on the sieve, killing multiple birds with one stone;

[0023] (3) By combining the second heat exchange component and the waste removal component provided, the liquid after heat exchange in the first heat exchange component is lifted to the second heat exchange component at the top of the reaction furnace body by a water pump, and is further heated by the high temperature inside the reaction furnace body to become hot water or steam. Then, a part of the hot water or steam is sprayed into the waste removal component, so that sulfur dioxide in the gas passing through it reacts with the steam to generate sulfuric acid or sulfurous acid, and the relatively active CO and steam in CO, H2, CH4 react to generate CO2 and H2, avoiding too high a concentration of CO, and the combustion calorific value of CO is not as good as that of H2. Description of the Drawings

[0024] Figure 1 is the structural schematic diagram of the biomass integrated gasification combustion device in Embodiment 1;

[0025] Figure 2 is the structural schematic diagram of the lower half of the biomass integrated gasification combustion device in Embodiment 1;

[0026] Figure 3 It is a schematic plan view of the fixing plate of the heat exchange component in the biomass integrated gasification combustion device in Embodiment 1;

[0027] Figure 4 is Figure 3 a schematic side view of the fixing plate of the heat exchange component described in

[0028] Figure 5 It is a schematic structural view of the biomass integrated gasification combustion device in Embodiment 2;

[0029] Figure 6 It is a schematic view of the waste removal component of the biomass integrated gasification combustion device in Embodiment 2.

[0030] In the figure:

[0031] 100, reaction furnace body;

[0032] 200, feeding device;

[0033] 300, heating grate; 310, fuel inlet;

[0034] 400, gas outlet;

[0035] 500, ash hopper; 510, screen; 520, eccentric wheel; 530, elastic member; 540, carbon outlet; 550, transmission structure;

[0036] 600, ash auger;

[0037] 700, first heat exchange component; 710, inlet water header; 720, outlet water header; 730, heat exchange tube bundle; 740, fixing plate; 741, air flow channel; 742, air inlet; 750, water pump;

[0038] 800, second heat exchange component; 810, flow regulating valve;

[0039] 900, waste removal component; 910, gas channel; 920, baffle plate; 930, spray nozzle; 940, liquid outlet; 950, liquid leakage hole. Detailed implementation manners

[0040] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0041] Embodiment 1

[0042] As Figure 1 - Figure 2As shown in the figure, the biomass integrated gasification combustion device of this embodiment includes a reaction furnace body 100, a feeding device 200 located at the top of the reaction furnace body 100, a heating grate 300 located below the reaction chamber in the reaction furnace body 100 (a fuel inlet 310 is provided on one side of the heating grate 300), and a gas outlet 400 located on the reaction furnace body 100 and above the reaction chamber. It further includes: an ash hopper 500, a first heat exchange component 700, and an ash auger 600. Specifically:

[0043] The ash hopper 500 is located below the heating grate 300. The feeding end of the ash hopper 500 is located on one side of the advancing direction of the heating grate 300. An inclined screen 510 is provided inside the ash hopper 500 for screening biomass charcoal and biomass ash. The inclined high end of the screen 510 is located below the feeding end.

[0044] The first heat exchange component 700 is composed of a heat exchange tube bundle 730 located below the screen 510 in the ash hopper 500, and a water inlet header 710 and a water outlet header 720 located at both ends of the heat exchange tube bundle 730 and outside the ash hopper 500. The water inlet header 710 is located on one side of the inclined bottom end of the screen 510. The heat exchange tube bundle 730 exchanges heat between the falling biomass ash and the liquid flowing inside the heat exchange tube bundle 730.

[0045] The ash auger 600 is located below the heat exchange tube bundle 730 and is used to convey the heat-exchanged biomass ash out of the reaction furnace body 100.

[0046] Biomass enters the reaction chamber of the reaction furnace body 100 from the feeding device 200. The heating grate 300 heats the biomass fuel to be gasified, so that the biomass gasifies and burns in the reaction chamber. The biomass gasification combustion undergoes thermal decomposition and is converted into CO, H2, CH4 or other alkane gases, which are conveyed to the gas-using equipment through the gas outlet 400. Among them, the solid residue of the biomass after gasification combustion falls onto the heating grate 300 and then into the ash hopper 500. After being screened by the screen 510, biomass carbon and biomass ash are obtained. The biomass ash falls into the first heat exchange component 700. The heat exchange tube bundle 730 exchanges heat between the falling biomass ash and the liquid flowing inside the heat exchange tube bundle 730. The heat-exchanged biomass ash falls into the ash auger 600 and is removed from the device.

[0047] Furthermore, as Figure 3 - Figure 4As shown in the figure, a plurality of fixing plates 740 for fixing the heat exchange tube bundle 730 are provided on the heat exchange tube bundle 730. Strip-shaped air flow channels 741 are provided between the heat exchange tubes adjacent to each other vertically inside the fixing plates 740, and outlets are provided on both sides of the air flow channels 741. The outlets are located on both sides of the fixing plates 740 and the outlets face the heat exchange tubes. The intake ends of the plurality of air flow channels 741 are connected to an air inlet 742 through a vertical channel. A pressure regulating valve is provided on the air inlet 742 to control the air volume and air speed of the air entering from the air inlet 742; during the heating process of the heating grate 300, the gasifier needs air to enter. The present invention uses the air blown out from the air inlet 742 through the air flow channels 741 to replace the air blowing ports of the traditional biomass gasifier to provide air for biomass gasification. At the same time, the air blown out from the air flow channels 741 is used to clean the biomass ash staying on the heat exchange tube bundle 730, and the air is used to cool down the biomass charcoal on the screen 510.

[0048] Further, as Figure 2 shown in the figure, an eccentric wheel 520 is provided below the inclined high end of the screen 510. When the eccentric wheel 520 rotates, it drives the screen 510 to move upward. An elastic member 530 is provided below the inclined low end of the screen 510 to provide buffering when the screen 510 moves upward. When the eccentric wheel 520 rotates, the screen 510 moves upward and then freely falls. The whole screen 510 can produce a vibration effect, which is beneficial to the separation of biomass charcoal and biomass ash. After screening, the biomass charcoal stays on the screen 510. An outlet 540 for charcoal is provided on one side of the inclined low end of the screen 510 to clean the biomass charcoal on the screen 510 during shutdown. The biomass ash falls into the heat exchange tube bundle 730. The heat exchange tube bundle 730 is made of high-temperature resistant inorganic materials.

[0049] Further, a water pump 750 is provided at the water outlet end of the water outlet header 720. A transmission structure 550 is provided at the driving end of the eccentric wheel 520. The transmission structure 550 drives the eccentric wheel 520 to rotate by using the pump flow generated by the water pump 750, which can save energy and reduce the use of motors. The transmission structure 550 is composed of a driving wheel located at the driving end of the eccentric wheel 520, a liquid wheel located at the water inlet end of the water pump 750, and a transmission wheel connecting the driving wheel and the liquid wheel. The liquid wheel and the transmission wheel are connected through a transmission member, and the transmission wheel and the driving wheel are connected through a rotating shaft.

[0050] The biomass integrated gasification combustion process of this embodiment uses the above-mentioned biomass integrated gasification combustion device and includes the following steps:

[0051] (1) Biomass enters the reaction chamber of the reaction furnace body 100 from the feeding device 200. The biomass fuel to be gasified is heated by the heating grate 300. The air blown out from the air inlet 742 through the air flow channel 741 is used to provide air for biomass gasification instead of the air blower opening of the traditional biomass gasifier, enabling the biomass to gasify and burn in the reaction chamber. Among them, the solid residue of the biomass after gasification and combustion falls onto the heating grate 300 and then into the ash chamber 500. After screening by the sieve 510, biomass carbon and biomass ash are obtained. The biomass ash falls into the first heat exchange component 700, and the heat exchange tube bundle 730 exchanges heat between the falling biomass ash and the liquid flowing inside the heat exchange tube bundle 730. The heat-exchanged biomass ash falls into the ash auger 600 and is removed from the device;

[0052] (2) The biomass gasification combustion undergoes thermal decomposition and is converted into CO, H2, CH4 or other alkane gases, which are transported to the gas-using equipment through the gas outlet 400.

[0053] Embodiment 2

[0054] On the basis of Embodiment 1, as Figure 5 shown, the device further includes a second heat exchange component 800. The structure of the second heat exchange component 800 is the same as that of the first heat exchange component 700. The water inlet header 710 of the second heat exchange component 800 is connected to the water outlet header 720 of the first heat exchange component 700. Since the waste heat of the biomass ash has a certain limit and may not be able to completely heat the water in the first heat exchange component 700 to boiling, the second heat exchange component 800 is designed. The water is pumped to the second heat exchange component 800 by the water pump 750 and is secondarily heated by the temperature inside the reaction furnace body 100, making the water temperature inside the heat exchange tube bundle 730 higher, even turning into steam. Then, it can be directly utilized or put into the boiler for reheating, which can reduce the use of fuel. Moreover, the second heat exchange component 800 is arranged above the reaction chamber and below the feeding device 200. The gap of the heat exchange tube bundle 730 (the gap distance between the heat exchange tubes is designed to be at least 20 cm) can disperse the materials fed by the feeding device 200, making it more dispersed and evenly laid in the reaction chamber. At the same time, the air flow channel 741 in the fixed plate 740 of the second heat exchange component 800 is used for the circulation of nitrogen. One purpose is to clean the biomass falling on the heat exchange tube bundle 730. The second purpose is that nitrogen is introduced into the air flow channel 731. Nitrogen is lighter than air and moves upward. When the feeding device 200 feeds materials, the air between the biomass can be extruded, preventing a large amount of air from entering the top of the reaction furnace and affecting the reaction. A flow regulating valve 810 is provided at the water outlet end of the water outlet header 720 of the second heat exchange component 800, and the other end is connected to an external steam-using equipment, water-using equipment or boiler.

[0055] Furthermore, as Figure 6As shown, the device also includes a waste removal component 900, the air inlet end of the waste removal component 900 is connected to one end of the gas outlet 400, and the air outlet end of the waste removal component 900 is connected to an external device (industrial boiler or gas purification system). The waste removal component 900 includes a tank body and a plurality of staggered baffles 920 located at the top and bottom ends of the tank body, and an S-shaped gas channel 910 is formed between the air inlet end and the air outlet end, so that the residence time of the gas inside is prolonged. A nozzle 930 is provided at the top of the tank body, and the inlet of the nozzle 930 is connected to one end of the flow regulating valve 810 at the water outlet end of the second heat exchange component 800. A liquid outlet 940 is provided at the bottom of the tank body, and the bottom end of the tank body is a semi-concave ellipse. A leakage hole 950 is provided at the bottom of the baffle 920 located at the bottom end of the tank body, and the liquid flows into the liquid outlet 940 along the leakage hole 950. A portion of the hot water or hot steam in the second heat exchange component 800 is sprayed into the waste removal component 900 through the nozzle 930, so that the sulfur dioxide in the fuel gas passing through the fuel gas channel 910 reacts with the steam to generate sulfuric acid or sulfurous acid, and the sulfur dioxide in the fuel gas can be removed and converted into by-product sulfuric acid or sulfurous acid to be collected, and the more active CO, H2, and CH4 react with the steam to generate CO2 and H2, thereby avoiding excessive CO concentration. The combustion calorific value of CO is not as good as that of H2, and the combustion value of the fuel gas can be further improved.

[0056] The biomass integrated gasification combustion process of this embodiment, using the above-mentioned biomass integrated gasification combustion device, includes the following steps:

[0057] (1) Biomass enters the reaction chamber of the reactor body 100 from the feeding device 200, and the biomass fuel to be gasified is heated by the heating grate 300. The air blown out from the air flow channel 741 by the air inlet 742 replaces the blast port of the traditional biomass gasifier to provide air for biomass gasification, so that the biomass is gasified and burned in the reaction chamber. The solid residue of biomass after biomass gasification and combustion falls into the heating grate 300, and then falls into the ash falling chamber 500. After screening by the screen 510, biomass carbon and biomass ash are obtained. The biomass ash falls into the first heat exchange component 700. The heat exchange tube bundle 730 uses the fallen biomass ash to exchange heat with the liquid flowing inside the heat exchange tube bundle 730. The biomass ash after heat exchange falls into the ash discharge auger 600 and is removed from the device.

[0058] (2) The liquid in the first heat exchange assembly 700 is pumped to the second heat exchange assembly 800, and the second heat exchange assembly 800 is further heated by the high temperature inside the reaction chamber, and then discharged through the flow control valve 810;

[0059] (3) Biomass gasification combustion undergoes thermal decomposition and is converted into CO, H2, CH4 or other alkane gases, which are transported to the gas-using equipment through the gas outlet 400. Among them, when the gas is discharged from the gas outlet 400, it passes through the waste removal component 900. The flow regulating valve 810 is used to control the injection of a part of the hot water or steam heated by the second heat exchange component 800 into the waste removal component 900, so that sulfur dioxide in the gas passing through the waste removal component 900 reacts with steam to generate sulfuric acid or sulfurous acid, and CO reacts with steam to generate CO2 and H2, avoiding too high a CO concentration and increasing the calorific value of the gas.

[0060] The above embodiments only represent several implementation modes of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A biomass integrated gasification combustion device, comprising a reaction furnace body, a feeding device located at the top of the reaction furnace body, a heating grate located below the reaction chamber in the reaction furnace body, and a gas outlet located on the reaction furnace body and above the reaction chamber, characterized in that: An ash hopper, located below the heating grate, the feeding end of the ash hopper is located on one side of the advancing direction of the heating grate, and an inclined screen is provided inside the ash hopper for screening biomass charcoal and biomass ash, and the inclined high end of the screen is located below the feeding end; A first heat exchange component, which consists of a heat exchange tube bundle located below the screen in the ash hopper, and a water inlet header and a water outlet header located at both ends of the heat exchange tube bundle and outside the ash hopper. The water inlet header is located on one side of the inclined bottom end of the screen; the heat exchange tube bundle exchanges heat between the falling biomass ash and the liquid flowing inside the heat exchange tube bundle; a plurality of fixing plates for fixing the heat exchange tube bundle are provided on the heat exchange tube bundle, and strip-shaped air flow channels are provided between the heat exchange tubes adjacent up and down inside the fixing plates, and outlets are provided on both sides of the air flow channels. The outlets are located on both sides of the fixing plate and the outlets face the heat exchange tubes. The intake ends of a plurality of air flow channels are connected to an air inlet through a vertical channel, and a pressure regulating valve is provided on the air inlet for controlling the air volume and air speed; An ash auger, located below the heat exchange tube bundle, for conveying the heat-exchanged biomass ash out of the reaction furnace body.

2. The biomass integrated gasification combustion device according to claim 1, wherein: An eccentric wheel is provided below the inclined high end of the screen. When the eccentric wheel rotates, it drives the screen to move upward. An elastic member is provided at the lower end of the inclined bottom end of the screen for providing buffering when the screen moves upward.

3. The biomass integrated gasification combustion device according to claim 2, characterized in that: An outlet for charcoal is provided on one side of the inclined bottom end of the screen for cleaning the biomass charcoal on the screen during shutdown.

4. The biomass integrated gasification combustion device according to claim 2, wherein: A water pump is provided at the water outlet end of the water outlet header, and a transmission structure is provided at the driving end of the eccentric wheel. The transmission structure drives the eccentric wheel to rotate by using the pump flow generated by the water pump.

5. A biomass integrated gasification combustion device according to claim 1, characterized in that: The device further includes a second heat exchange component. The structure of the second heat exchange component is the same as that of the first heat exchange component. The water inlet header of the second heat exchange component is connected to the water outlet header of the first heat exchange component. The air flow channels in the fixing plates of the second heat exchange component are used for circulating nitrogen, and a flow regulating valve is provided at the water outlet end of the water outlet header of the second heat exchange component.

6. The biomass integrated gasification combustion device according to claim 5, characterized in that: The device further includes a waste removal component. The intake end of the waste removal component is connected to one end of the gas outlet, and the outlet end of the waste removal component is connected to an external device. The waste removal component includes a tank body and a plurality of staggered baffle plates located at the top and bottom inside the tank body, forming an S-shaped gas channel between the intake end and the outlet end. A spray pipe is provided at the top of the tank body, and the inlet of the spray pipe is connected to one end of the flow regulating valve at the water outlet end of the second heat exchange component. A liquid outlet is provided at the bottom of the tank body.

7. A biomass integrated gasification combustion device according to claim 6, characterized in that: The bottom end of the tank body is semi-elliptical concave, and liquid leakage holes are provided at the bottom of the baffle plates located at the bottom inside the tank body.

8. A biomass integrated gasification combustion process, which utilizes the biomass integrated gasification combustion device according to any one of claims 1-7, characterized in that: Including the following steps: (1) Biomass enters the reaction chamber of the reaction furnace body from the feeding device, and the biomass fuel to be gasified is heated by the heating grate, so that the biomass gasifies and burns in the reaction chamber. Among them, the solid residue of the biomass after gasification and combustion falls onto the heating grate, then falls into the ash chamber, and after being screened by the sieve, biomass carbon and biomass ash are obtained. The biomass ash falls into the first heat exchange component, and the heat exchange tube bundle exchanges heat between the falling biomass ash and the liquid flowing inside the heat exchange tube bundle. The biomass ash after heat exchange falls into the ash auger and is removed from the device; (2) The biomass gasification combustion undergoes thermal decomposition and is converted into CO, H2, CH4 or other alkane gases, and is transported to the gas-using equipment through the gas outlet.

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