Biomass gasification hydrogen, electricity and heat trigeneration system

Abstract

The utility model relates to the technical field of energy, in particular to a biomass gasification hydrogen-electricity-heat trigeneration system which comprises a biomass waste treatment device, a gasification furnace, a fuel gas pretreatment device, a desulfurization tower, a carbon monoxide isothermal sulfur-free converter, a PSA hydrogen extraction device, a generator set and a waste heat boiler which are sequentially communicated in series. Biomass waste is gasified in the gasification furnace through the gasification medium to obtain biomass fuel gas, then the biomass fuel gas is treated through the desulfurization tower and the carbon monoxide isothermal sulfur-free converter, finally hydrogen is obtained through the PSA hydrogen extraction device, electric energy is obtained through the generator set, heat energy is obtained through the waste heat boiler, and the energy is saved. And hydrogen, electricity and heat trigeneration is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of energy, in particular to a biomass gasification hydrogen electricity and heat trigeneration system. Background Art

[0002] As an important industrial raw material and clean fuel, hydrogen is widely used in the fields of petroleum, chemical engineering, metallurgy, electronics, and medicine. Traditional hydrogen production relies primarily on fossil fuels such as coal and natural gas, while the high production cost of hydrogen produced by water electrolysis has limited its widespread adoption.

[0003] Biomass waste, such as agricultural product processing residues, forestry residues, and energy crops, is a renewable energy source that is green, low-carbon, clean, and renewable. Direct incineration of these biomass wastes produces large amounts of smoke and dust, polluting the atmosphere and failing to fully utilize the resources they contain.

[0004] Based on this, the present application proposes a system that can both process biomass waste and produce green and clean energy. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a biomass gasification hydrogen electric heat trigeneration system, which realizes the purpose of producing hydrogen from biomass waste.

[0006] The utility model is achieved through the following technical solutions:

[0007] A biomass gasification hydrogen electricity and heat trigeneration system, comprising:

[0008] A biomass waste treatment device, wherein the input end of the biomass waste treatment device inputs biomass with high moisture content, and the output end of the biomass waste treatment device outputs block-shaped biomass with low moisture content;

[0009] A gasifier, wherein a solid input end thereof is connected to an output end of the biomass waste treatment device, a gasification medium is input to a gas input end of the gasifier, and a biomass fuel gas is output to a gas output end of the gasifier;

[0010] a fuel gas pretreatment device, the input end of which is connected to the gas output end of the gasifier;

[0011] a desulfurization tower, the input end of which is connected to the output end of the gas pretreatment device;

[0012] a carbon monoxide isothermal sulfur-free converter, the input end of which is connected to the output end of the desulfurization tower;

[0013] a heat exchanger, the input end of which is in communication with the output end of the carbon monoxide isothermal sulfur-free converter;

[0014] A PSA hydrogen extraction device, the input end of which is connected to the output end of the heat exchanger, and the hydrogen output end of the PSA hydrogen extraction device outputs product hydrogen;

[0015] A generator set, the fuel gas input of which is connected to the desorbed gas output of the PSA hydrogen extraction device, and the generator set outputs electrical energy;

[0016] A waste heat boiler, whose heat energy input end is connected to the tail gas output end of the generator set, and the heat boiler outputs steam.

[0017] Optionally, the moisture content of the high-moisture biomass is ≥30%, and the moisture content of the low-moisture block biomass is <30%.

[0018] Specifically, the biomass waste treatment device includes: a crushing device, a drum drying device and an extrusion molding device. The output end of the crushing device is connected to the input end of the drum drying device, and the output end of the drum drying device is connected to the input end of the extrusion molding device. The extrusion molding device outputs block-shaped biomass.

[0019] Specifically, the gas pretreatment device includes: a purification device, a gas pressurizing device and a pipeline heater. The purification device, the gas pressurizing device and the pipeline heater are connected in series in sequence. The input end of the purification device is connected to the gas output end of the gasifier, and the output end of the pipeline heater is connected to the input end of the desulfurization tower.

[0020] Optionally, the purification device includes: an inertial dust collector, a water washing tower and an adsorption tank, the inertial dust collector, the water washing tower and the adsorption tank are connected in series in sequence, the input end of the inertial dust collector is connected to the gas output end of the gasification furnace, and the output end of the adsorption tank is connected to the input end of the gas pressurizing equipment.

[0021] Furthermore, the trigeneration system also includes: a low-nitrogen burner and a combustion chamber, the input end of the low-nitrogen burner is connected to the output end of the purification device, the output end of the low-nitrogen burner is connected to the input end of the combustion chamber, the output end of the combustion chamber is connected to the heat source input end of the drum drying equipment, and the heat source output end of the drum drying equipment is connected to the exhaust gas treatment system.

[0022] Optionally, the gasification medium includes oxygen and water vapor, the oxygen is produced by an air separation oxygen production device, the water vapor is produced by a waste heat boiler, and the oxygen and the water vapor are mixed by a premixer.

[0023] Optionally, the solid input end of the gasifier is arranged at the top of the gasifier, the gas input end of the gasifier is arranged at the bottom of the gasifier, and the gas output port of the gasifier is arranged at the upper part of the gasifier;

[0024] The reaction temperature of the gasifier is greater than 1000°C, and the temperature of the biomass gas output by the gasifier is 100°C.

[0025] Specifically, the heat exchanger is used to reduce the output temperature of the carbon monoxide isothermal sulfur-free converter. A buffer tank is provided between the desorbed gas output end of the PSA hydrogen extraction device and the gas input end of the generator set.

[0026] Optionally, the tail gas output end of the waste heat boiler is connected to a tail gas treatment system.

[0027] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0028] The utility model obtains biomass gas by gasifying biomass waste through a gasification medium in a gasifier, then processes the biomass gas through a desulfurization tower and a carbon monoxide isothermal sulfur-free converter, and finally obtains hydrogen through a PSA hydrogen extraction device, obtains electrical energy through a generator set, and obtains thermal energy through a waste heat boiler, thereby realizing the trigeneration of hydrogen, electricity and heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification and do not constitute a limitation on the embodiments of the present invention.

[0030] Figure 1 It is a partial schematic diagram of a biomass gasification hydrogen electricity and heat trigeneration system according to the utility model.

[0031] Figure 2 It is a schematic diagram of the remaining part of a biomass gasification hydrogen electricity and heat trigeneration system according to the utility model.

[0032] Description of the drawings: 1-drum drying equipment, 2-extrusion molding equipment, 3-gasification furnace, 4-purification device, 5-gas pressurizing equipment, 6-pipeline heater, 7-desulfurization tower, 8-carbon monoxide isothermal sulfur-free converter, 9-heat exchanger, 10-low nitrogen burner, 11-combustion chamber, 12-PSA hydrogen extraction device, 13-buffer tank, 14-generator set, 15-waste heat boiler. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the relevant content and are not intended to limit the present invention.

[0034] It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

[0035] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] Based on the existing problems, research has found that, combined with the problems of low hydrogen production in existing hydrogen production technology, excessive consumption of electricity and steam in the production process, and large desorption gas production that cannot be fully utilized, if biomass waste is used for pure oxygen gasification to produce hydrogen, and energy is fully utilized to produce other by-products during the preparation process, it not only provides a method for treating biomass waste and eliminates safety and environmental hazards, but also produces hydrogen, electricity and heat energy in this way, thereby obtaining green and clean properties and replacing the consumption of fossil fuels to reduce carbon emissions.

[0039] Example 1

[0040] like Figure 1 and Figure 2As shown, a biomass gasification hydrogen-electricity-heat trigeneration system is provided, comprising: a biomass waste treatment device, a gasifier 3, a gas pretreatment device, a desulfurization tower 7, a carbon monoxide isothermal sulfur-free converter 8, a PSA hydrogen extraction device 12, a generator set 14, and a waste heat boiler 15, all connected in series. The system gasifies the biomass waste to achieve biomass waste treatment. Hydrogen is then produced by the PSA hydrogen extraction device 12, electricity is generated by the generator set 14, and heat is generated by the waste heat boiler 15.

[0041] The input end of the biomass waste treatment device inputs high-moisture biomass, and the output end of the biomass waste treatment device outputs low-moisture-content block biomass. The solid input end of the gasifier 3 is connected to the output end of the biomass waste treatment device. The gasification medium is input to the gasification medium 3, and the gasification medium 3 outputs biomass fuel gas. The input end of the fuel gas pretreatment device is connected to the gas output end of the gasification furnace 3. The input end of the desulfurization tower 7 is connected to the output end of the fuel gas pretreatment device. The input end of the carbon monoxide isothermal sulfur-free converter 8 is connected to the output end of the desulfurization tower 7. The gasification medium includes oxygen and water vapor. The oxygen is produced by air separation oxygen production equipment, and the water vapor is produced by waste heat boiler 15. The oxygen and water vapor are mixed in a premixer.

[0042] The input of the PSA hydrogen extraction unit 12 is connected to the output of the carbon monoxide isothermal sulfur-free converter 8. The hydrogen output of the PSA hydrogen extraction unit 12 outputs product hydrogen. The gas input of the generator set 14 is connected to the desorbed gas output of the PSA hydrogen extraction unit 12, and the generator set 14 outputs electricity. The heat input of the waste heat boiler 15 is connected to the exhaust gas output of the generator set 14, and the waste heat boiler outputs steam. A buffer tank 13 is provided between the desorbed gas output of the PSA hydrogen extraction unit 12 and the gas input of the generator set 14.

[0043] The utility model adopts pure oxygen gasification technology, using a mixture of oxygen and water vapor as the gasification medium, which can increase the proportion of hydrogen in biomass fuel gas by about 5% to 10%. The carbon monoxide conversion technology is used to convert the conversion in biomass fuel gas, further increasing the proportion of hydrogen in the fuel gas by about 15% to 20%, thereby increasing the hydrogen production.

[0044] Furthermore, the biomass fuel gas produced in the present invention and the desorbed gas used in producing hydrogen can be used for power generation by gas turbines or internal combustion engines, thereby reducing self-use energy consumption.

[0045] Gas turbines and internal combustion engines generate high-temperature exhaust gas with a temperature of 500°C. In order to fully utilize energy, improve heat conversion efficiency, and achieve step-by-step energy utilization, a waste heat boiler 15 is used to recover waste heat. The recovered steam can be used for self-use or sold to other parties, thereby reducing production costs.

[0046] Through the coordination of hydrogen, electricity and thermal energy, this system ultimately produces green hydrogen, electricity and steam with high added value, reducing fossil energy consumption and achieving zero carbon emissions.

[0047] Example 2

[0048] This embodiment provides a detailed description of some of the devices in the first embodiment.

[0049] The biomass waste treatment device processes the biomass waste to obtain agglomerated biomass that can enter the gasification furnace 3 .

[0050] The biomass waste treatment device includes: a crushing device, a drum drying device 1 and an extrusion molding device 2. The output end of the crushing device is connected to the input end of the drum drying device 1, and the output end of the drum drying device 1 is connected to the input end of the extrusion molding device 2. The extrusion molding device 2 outputs block biomass.

[0051] Generally, the moisture content of high-moisture biomass is set to be ≥30%, and the moisture content of low-moisture block biomass is set to be <30%.

[0052] The biomass waste is crushed by crushing equipment, then dried to remove a large amount of water, and then squeezed into block-shaped objects to facilitate entry into the gasification furnace 3.

[0053] In addition, a heat source is required to dry the biomass waste by the drum drying equipment 1. The trigeneration system in this embodiment also includes a low-nitrogen burner 10 and a combustion chamber 11. The input end of the low-nitrogen burner 10 is connected to the output end of the purification device 4, and the output end of the low-nitrogen burner 10 is connected to the input end of the combustion chamber 11. The output end of the combustion chamber 11 is connected to the heat source input end of the drum drying equipment 1, and the heat source output end of the drum drying equipment 1 is connected to the exhaust gas treatment system.

[0054] The gas pretreatment device processes the biomass gas after gasification, separates impurities such as tar, dust and water from the gas, and heats it for high-temperature desulfurization.

[0055] The gas pretreatment device includes: a purification device 4, a gas pressurizing device 5 and a pipeline heater 6. The purification device 4, the gas pressurizing device 5 and the pipeline heater 6 are connected in series in sequence. The input end of the purification device 4 is connected to the gas output end of the gasification furnace 3, and the output end of the pipeline heater 6 is connected to the input end of the desulfurization tower 7.

[0056] The purification device 4 includes: an inertial dust collector, a water washing tower and an adsorption tank. The inertial dust collector, the water washing tower and the adsorption tank are connected in series in sequence. The input end of the inertial dust collector is connected to the gas output end of the gasification furnace 3, and the output end of the adsorption tank is connected to the input end of the gas pressurizing device 5.

[0057] Example 3

[0058] This embodiment provides a processing process based on the system of embodiment 1 and embodiment 2.

[0059] Biomass waste is collected and stored in a temporary storage area. After being crushed and screened by a dual-shaft crushing device, biomass waste with a moisture content ≥ 30% is transported to a drum drying device 1 to be dried to a moisture content of < 30%. Raw materials with a moisture content of < 30% are mixed and transported to an extrusion molding device 2 for simple briquetting to obtain block biomass.

[0060] The lump biomass is fed into the updraft fixed-bed gasifier 3 for gasification. The gasification medium is composed of oxygen produced by the air separation oxygen production equipment and water vapor produced by the waste heat boiler 15. The gasification medium is mixed in a premixer before entering the furnace and then passed into the bottom of the updraft fixed-bed gasifier 3, where it comes into reverse contact with the molding raw materials and undergoes oxidation, reduction, pyrolysis, and drying from bottom to top to produce biomass fuel gas. The solid input end of the gasifier 3 is set at the top of the gasifier 3, the gas input end of the gasifier 3 is set at the bottom of the gasifier 3, and the gas output port of the gasifier 3 is set at the upper part of the gasifier 3; the reaction temperature of the gasifier 3 is greater than 1000°C.

[0061] The biomass gas is output from the upper part of the updraft fixed bed gasifier 3, and the outlet gas temperature is about 100°C. The gas is removed from oil and ash in turn by the inertial dust collector, water scrubber and adsorption tank. A portion of the biomass gas is passed into the low-nitrogen burner 10 and burned in the combustion chamber 11 to generate high-temperature flue gas as a heat source for drying the biomass waste. The dried exhaust gas is passed into the exhaust gas treatment system.

[0062] The other part of the biomass gas passes through the gas pressurizing device 5 and the pipeline heater 6, and is pressurized and heated before entering the desulfurization tank. In order to reduce the pollution of sulfur-containing substances in the gas to the carbon monoxide conversion catalyst and increase its service life, it is passed into the desulfurization tower 7 where zinc oxide adsorbent is used to reduce the sulfur content.

[0063] The desulfurized gas is passed into the carbon monoxide isothermal sulfur-free converter 8 to react with water vapor, converting most of the carbon monoxide in the gas into hydrogen, increasing the hydrogen content. The converted gas is too hot and needs to be passed into the heat exchanger 9 to reduce the gas temperature. After meeting the requirements of the subsequent process, it is passed into the pressure swing adsorption hydrogen extraction to produce hydrogen;

[0064] The desorbed gas remaining after hydrogen extraction is fed into a steam turbine or internal combustion engine power generation equipment for power generation. The high-temperature tail gas after power generation is about 500°C and can be recycled through the waste heat boiler 15 to produce steam for self-use or for sale. The remaining tail gas temperature is about 120°C and is fed into the tail gas treatment system for treatment.

[0065] The tail gas is discharged after being treated to meet the emission standards, and the wastewater generated during the production process is discharged after being treated to meet the standards.

[0066] The exhaust gas generated by the system is mainly composed of nitrogen oxides, dust and VOC. The exhaust gas is treated by spraying ammonia water in the combustion chamber, adding a medium and low temperature selective catalytic reduction device at the back end, and condensation and water washing.

[0067] The connection structure can be summarized as follows: crushing equipment, drum drying equipment 1, extrusion molding equipment 2, updraft fixed bed gasification furnace 3, inertial dust collector, water washing tower, adsorption tank, gas pressurizing equipment 5, pipeline heater 6, desulfurization tower 7, carbon monoxide isothermal sulfur-free converter 8, heat exchanger 9, PSA hydrogen extraction device, generator set 14, waste heat boiler 15, and tail gas treatment system are connected in sequence.

[0068] The low nitrogen burner 10, the combustion chamber 11, the drum drying equipment 1, and the tail gas treatment system are connected in sequence.

[0069] The tail gas outlet of the waste heat boiler 15 and the tail gas treatment system are connected in sequence; the steam outlet of the waste heat boiler 15, the air separation oxygen production equipment, and the premixer are connected.

[0070] Example 4

[0071] This embodiment conducts research and development of biomass pure oxygen, hydrogen gas, electricity and heat trigeneration technology, using biomass raw materials to replace traditional fossil energy for hydrogen and electricity production, thereby achieving step-by-step energy utilization.

[0072] Biomass waste is collected and transported to the fuel preparation area;

[0073] The raw materials are crushed to a particle size of less than 30 mm by crushing equipment;

[0074] The crushed raw materials enter the drum drying equipment 1 to be dried until the moisture content is less than 30%;

[0075] The dried raw materials are extruded into compacted biomass blocks through the extrusion molding device 2 and placed in the storage area;

[0076] The lump biomass fuel is transported to the gasification area;

[0077] The lump biomass fuel is loaded onto a bucket conveyor and lifted to the feed preparation bin at the top of the gasifier 3. The preparation bin is connected to the feed transfer bin below. Feed interlock valves are set above and below the transfer bin. The opening and closing of the feed interlock valves are controlled by the material level sensor inside the gasifier 3 to ensure the airtightness of the gasification system and the material supply. At the same time, the material level controllers of the transfer bin and the preparation bin control the feed conveying equipment.

[0078] The gasification medium is fed from the bottom of the furnace, using oxygen and water vapor as the gasification medium, and the fuel gas is discharged from the top of the furnace. The gasification medium is fed from the bottom of the furnace to the gasification section, where oxygen and carbon in the raw materials undergo an exothermic oxidation reaction, and the temperature of the gasification oxidation section is maintained at >800°C;

[0079] The bottom of the gasifier 3 adopts a tower-type rotary grate slag removal process to discharge the ash and transport it outside. The ash is plant ash and can be returned to the field;

[0080] The gas produced by gasification enters the purification device 4 to separate tar, dust and water from the gas;

[0081] The purified fuel gas enters the gas pressurizing equipment 5 for pressurization, the pipeline heater 6 for heating, the desulfurization tower 7, the carbon monoxide isothermal sulfur-free converter 8 to convert the CO in the fuel gas into H2, and then enters the heat exchanger 9 to reach the pressure and temperature required by the subsequent process;

[0082] The converted and cooled fuel gas is fed into the PSA hydrogen extraction device 12 to extract H2, which can be used as raw material to supply local hydrogen-consuming enterprises or as clean energy.

[0083] The remaining desorbed gas is fed into the low calorific value generator set 14 to generate electricity for self-use or to be connected to the grid;

[0084] The high-temperature flue gas generated by the generator set 14 is about 500°C, which can be reduced to about 100°C by the waste heat recovery boiler. The recovered heat can be used to generate steam for self-use or sale;

[0085] Drying tail gas and boiler tail gas are treated by tail gas treatment system and then discharged in compliance with emission standards;

[0086] The wastewater generated during the production process is treated by the wastewater treatment system and then discharged in compliance with the emission standards.

[0087] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0088] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0089] Those skilled in the art will appreciate that the above embodiments are merely intended to clearly illustrate the present invention and are not intended to limit the scope of the present invention. Other variations or modifications may be made based on the above-described utility model, and such variations or modifications are still within the scope of the present invention.

Claims

1. A biomass gasification hydrogen electricity and heat trigeneration system, characterized in that: include: A biomass waste treatment device, wherein the input end of the biomass waste treatment device inputs biomass with high moisture content, and the output end of the biomass waste treatment device outputs block-shaped biomass with low moisture content; A gasifier (3), wherein a solid input end thereof is connected to an output end of the biomass waste treatment device, a gasification medium is input to the gas input end of the gasifier (3), and a biomass fuel gas is output to the gas output end of the gasifier (3); a fuel gas pre-treatment device, the input end of which is in communication with the gas output end of the gasification furnace (3); a desulfurization tower (7), the input end of which is connected to the output end of the gas pretreatment device; a carbon monoxide isothermal sulfur-free converter (8), the input end of which is connected to the output end of the desulfurization tower (7); a heat exchanger (9), the input end of which is in communication with the output end of the carbon monoxide isothermal sulfur-free converter (8); A PSA hydrogen extraction device (12), the input end of which is in communication with the output end of the heat exchanger (9), and the hydrogen output end of the PSA hydrogen extraction device (12) outputs product hydrogen; A generator set (14), the fuel gas input end of which is in communication with the desorbed gas output end of the PSA hydrogen extraction device (12), and the generator set (14) outputs electrical energy; A waste heat boiler (15) has a heat energy input end connected to the tail gas output end of the generator set (14), and the heat boiler outputs steam.

2. The biomass gasification hydrogen electricity and heat trigeneration system according to claim 1, characterized in that: The moisture content of the high-moisture biomass is ≥30%, and the moisture content of the low-moisture block biomass is <30%.

3. The biomass gasification hydrogen electricity and heat trigeneration system according to claim 1, characterized in that: The biomass waste treatment device comprises: a crushing device, a drum drying device (1) and an extrusion molding device (2); the output end of the crushing device is connected to the input end of the drum drying device (1); the output end of the drum drying device (1) is connected to the input end of the extrusion molding device (2); and the extrusion molding device (2) outputs block-shaped biomass.

4. The biomass gasification hydrogen electricity and heat trigeneration system according to claim 3, characterized in that: The gas pretreatment device comprises: a purification device (4), a gas pressurizing device (5) and a pipeline heater (6); the purification device (4), the gas pressurizing device (5) and the pipeline heater (6) are connected in series in sequence; the input end of the purification device (4) is connected to the gas output end of the gasification furnace (3); and the output end of the pipeline heater (6) is connected to the input end of the desulfurization tower (7).

5. The biomass gasification hydrogen electricity and heat trigeneration system according to claim 4, characterized in that: The purification device (4) comprises: an inertial dust collector, a water scrubber and an adsorption tank, wherein the inertial dust collector, the water scrubber and the adsorption tank are connected in series in sequence, the input end of the inertial dust collector is connected to the gas output end of the gasification furnace (3), and the output end of the adsorption tank is connected to the input end of the gas pressurizing device (5).

6. The biomass gasification hydrogen electricity and heat trigeneration system according to claim 4, characterized in that: The trigeneration system further comprises: a low-nitrogen burner (10) and a combustion chamber (11), wherein the input end of the low-nitrogen burner (10) is connected to the output end of the purification device (4), the output end of the low-nitrogen burner (10) is connected to the input end of the combustion chamber (11), the output end of the combustion chamber (11) is connected to the heat source input end of the drum drying device (1), and the heat source output end of the drum drying device (1) is connected to the exhaust gas treatment system.

7. The biomass gasification hydrogen electricity and heat trigeneration system according to claim 1, characterized in that: The gasification medium includes oxygen and water vapor, the oxygen is produced by air separation oxygen production equipment, the water vapor is produced by a waste heat boiler (15), and the oxygen and the water vapor are mixed by a premixer.

8. The biomass gasification hydrogen electricity and heat trigeneration system according to claim 1, characterized in that: The solid input end of the gasifier (3) is arranged at the top of the gasifier (3), the gas input end of the gasifier (3) is arranged at the bottom of the gasifier (3), and the gas output port of the gasifier (3) is arranged at the upper part of the gasifier (3); The reaction temperature of the gasifier (3) is greater than 1000°C, and the temperature of the biomass fuel gas output by the gasifier (3) is 100°C.

9. The biomass gasification hydrogen electricity and heat trigeneration system according to claim 1, characterized in that: The heat exchanger (9) is used to reduce the temperature of the converted fuel gas output by the carbon monoxide isothermal sulfur-free converter (8); A buffer tank (13) is provided between the desorbed gas output end of the PSA hydrogen extraction device (12) and the fuel gas input end of the generator set (14).

10. The biomass gasification hydrogen electricity and heat trigeneration system according to claim 1, characterized in that: The tail gas output end of the waste heat boiler (15) is connected to the tail gas treatment system.

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