Biomass pyrolysis gasification furnace and pyrolysis gasification method thereof

Abstract

The invention provides a biomass pyrolysis gasification furnace and a pyrolysis gasification method thereof.The biomass pyrolysis gasification furnace comprises a furnace body, a gasification reaction chamber is arranged in the furnace body, a feeding device is arranged on the upper portion and / or the lower portion of the gasification reaction chamber, and an environment-friendly heating device is installed at the position, on the top of the furnace body, of the upper portion of the gasification reaction chamber; an outer jacketed pipe is arranged on the outer side of the gasification reaction chamber and penetrates through the bottom of the furnace body to be connected with ash collecting equipment. A pyrolysis gas outlet and a drain outlet are respectively formed in one side and the bottom of the furnace body; the system has the advantages that the gasification efficiency is improved, the fuel gas quality is improved, the energy consumption is reduced, the pollution is reduced, the operation is flexible, the system safety is ensured, and the secondary pollution is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of biomass pyrolysis, and in particular to a biomass pyrolysis gasification furnace and a pyrolysis gasification method thereof. Background Art

[0002] Biomass gasification technology is a technology that converts biomass into combustible gases. Combustible gases mainly include hydrogen, carbon monoxide and methane. Biomass gasification technology is clean, efficient and renewable. Traditional biomass gasifiers mostly use electric heating or fuel heating. The impact of fuel heating on the environment is mainly reflected in greenhouse gas emissions and pollutant generation. For example, burning coal will produce a large amount of carbon dioxide, sulfur dioxide and nitrogen oxides and other pollutants. These substances will cause environmental problems such as acid rain and greenhouse effect. The combustion of liquid fuels will also produce carbon dioxide and some harmful organic compounds, causing pollution to the atmospheric environment. Therefore, traditional electric heating or fuel heating methods have problems such as high energy consumption, heavy pollution and low gasification efficiency.

[0003] After searching, the applicant retrieved the closest prior art as follows: a high-efficiency biomass pyrolysis gasification furnace with application number 201910070859.2, which discloses a technical solution, including a combustion tank, a pyrolysis tank, a cooling tank and an intelligent processing system, one side of the pyrolysis tank is fixed with a fixed plate, the cooling tank is fixedly installed on the top of the fixed plate, the bottoms of the combustion tank and the pyrolysis tank are fixedly connected with a connecting pipe 1, the bottom of the connecting pipe 1 is fixedly connected with a slag discharge pipe, the top of the pyrolysis tank is provided with a pyrolysis tank cover, one side of the top of the pyrolysis tank is fixedly connected with a return air pipe, and the return air pipe The other end is fixedly connected to the bottom of the combustion tank, a rotating rod is arranged in the pyrolysis tank, a plurality of dispersed square tubes are fixedly connected to the rotating rod, and an annular slide groove is provided at a position corresponding to the dispersed square tube on the inner wall of the pyrolysis tank. The high-efficiency biomass pyrolysis gasification furnace is reasonably designed, which can greatly improve the efficiency of biomass pyrolysis gasification, and the pyrolysis gasification effect is uniform; the application can solve the problem of low gasification efficiency, but its specification clearly mentions: "Put suitable fuel in the combustion tank and then ignite it", that is, the application adopts fuel heating method for heating, and there are still technical problems of high energy consumption and heavy pollution.

[0004] Therefore, it is necessary to provide a new solution to solve the above technical problems. Summary of the invention

[0005] The present application provides a biomass pyrolysis gasification furnace, comprising a furnace body, a gasification reaction chamber is arranged in the furnace body, a feeding device is arranged at the upper part and / or the lower part of the gasification reaction chamber, an environmental protection heating device is installed at the top of the furnace body at the upper part of the gasification reaction chamber, an outer jacket pipe is arranged on the outer side of the gasification reaction chamber, and the outer jacket pipe passes through the bottom of the furnace body and is connected with an ash collection device; a pyrolysis gas outlet and a sewage outlet are respectively arranged on one side and the bottom of the furnace body.

[0006] As a preferred solution, the feeding device arranged at the upper part of the gasification reaction chamber comprises a feeding pipeline communicated with the gasification reaction chamber, and the end of the feeding pipeline is connected with a feeding port.

[0007] As a preferred solution, the feeding device arranged at the lower part of the gasification reaction chamber includes a motor, the output end of the motor is connected to a screw feeder, the screw feeder is provided with a feed port 1, and the screw feeder is connected to the gasification reaction chamber.

[0008] As a preferred solution, the environmentally friendly heating device adopts at least one of a laser transmitter and a hydrogen flame combustion device.

[0009] As a preferred solution, a cylinder shield is provided on the outside of the laser emitter, a purified gas inlet is provided on one side of the cylinder shield, and the purified gas inlet extends to the outside of the furnace body.

[0010] As a preferred solution, an ash screening device is connected to the lower part of the ash collecting equipment.

[0011] As a preferred solution, the ash screening device comprises a screening device body, a partition is arranged in the screening device body, an ash screening discharge port 1 is arranged at the bottom of one side of the partition, and an ash screening discharge port 2 is arranged at the bottom of the other side of the partition.

[0012] As a preferred solution, the second ash screening discharge port is arranged at an incline.

[0013] As a preferred solution, the feeding device is connected to a pre-pyrolysis reactor.

[0014] As a preferred solution, the pyrolysis gas outlet of the gasification reaction chamber is connected to an input end of a pre-pyrolysis reactor through a pyrolysis gas pipeline, and an output end of the pre-pyrolysis reactor is connected to a condenser, and the condenser is connected to a pyrolysis gas production pipeline and a condensate production pipeline.

[0015] As a preferred solution, the condensate production pipeline is connected to the condensate tank, the top of the condensate tank is connected to the pyrolysis gas production pipeline through the condensate tank top pipeline, and the condensate tank production pipeline is provided at the bottom of the condensate tank.

[0016] As a preferred solution, the sewage outlet is connected to the condensate tank through a production pipeline at the bottom of the gasifier.

[0017] A biomass pyrolysis and gasification method comprises the following steps:

[0018] S1: biomass is introduced into the gasification reaction chamber;

[0019] S2: The environmentally friendly heating device heats the biomass in the gasification reaction chamber to perform biomass pyrolysis;

[0020] S3: The pyrolysis gas generated by the pyrolysis of biomass is extracted from the pyrolysis gas outlet, and the waste liquid generated by the pyrolysis of biomass is discharged through the sewage outlet;

[0021] S4: The ash generated by the biomass pyrolysis gas enters the outer jacket pipe along the top of the gasification reaction chamber and flows into the ash collection equipment along the outer jacket pipe.

[0022] As a preferred solution, it also includes S5: the ash enters the ash screening device from the bottom of the ash collecting device, the ash is screened by the ash screening device, the biomass that has not been pyrolyzed is separated from the ash, and the ash is discharged from the ash screening discharge port 1 and the ash screening discharge port 2 respectively.

[0023] As a preferred solution, the environmentally friendly heating device in S2 adopts a laser emitter and / or a hydrogen flame combustion device. The laser emitter focuses the laser beam into the gasification reaction chamber through a laser control device to form a light spot to heat and pyrolyze the biomass in the gasification reaction chamber; the hydrogen flame combustion device adopts hydrogen as fuel and oxygen as a nozzle ignition combustion device as a combustion aid, and the hydrogen combustion flame heats and pyrolyzes the biomass in the gasification reaction chamber.

[0024] As a preferred solution, the biomass in S1 is preheated in a pre-pyrolysis reactor and then enters a gasification reaction chamber.

[0025] As a preferred solution, the pyrolysis gas generated by the pyrolysis of the biomass enters the pre-pyrolysis reactor from the pyrolysis gas outlet, providing preheating heat for the biomass in the pre-pyrolysis reactor.

[0026] As a preferred solution, the pyrolysis gas after heat exchange enters the condenser, the biomass pyrolysis gas is collected from the top of the condenser, and the condensate is collected from the bottom of the condenser.

[0027] As a preferred solution, condensate is extracted from the bottom of the condenser and enters a condensate tank, biomass pyrolysis gas is extracted from the top of the condensate tank, and condensate is extracted from the bottom of the condensate tank.

[0028] As a preferred solution, the waste liquid discharged from the sewage outlet enters the condensate tank.

[0029] This application uses an environmentally friendly heating device to heat biomass, which has the following advantages:

[0030] (1) Improve gasification efficiency and gas quality: It can achieve faster and more uniform heating, thereby improving the gasification efficiency of biomass; in addition, since the heating process is more uniform and controllable, it can reduce the generation of tar and other impurities, thereby improving the quality of gas;

[0031] (2) Reduce energy consumption: Environmentally friendly heating can reduce energy loss during the heating process, thereby reducing overall energy consumption;

[0032] (3) Reduce pollution: Environmentally friendly heating does not produce pollutants such as carbon dioxide, sulfur dioxide and nitrogen oxides, thus reducing pollution;

[0033] (4) Flexible operation: Environmentally friendly heating can be precisely controlled as needed, providing better operational flexibility and reaction controllability;

[0034] (5) Ensure system safety: The entire gasification system is operated under positive pressure, which greatly reduces the risk of system explosion and improves system safety;

[0035] (6) Reduce secondary pollution and improve energy resource utilization: Through the design of the gasification reaction chamber and the optimization of the ash collection equipment, the utilization rate of energy resources can be improved and the waste of energy resources can be reduced.

[0036] (7) Improving the utilization rate of biomass pyrolysis gas. The biomass pyrolysis gas is used to preheat the biomass in the pre-pyrolysis reactor, thereby improving the thermal energy utilization rate of the biomass pyrolysis gas and also improving the pyrolysis efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of this application;

[0038] Figure 2 It is a schematic diagram of the structure of multiple environmentally friendly heating devices of the present application;

[0039] Figure 3 is a schematic structural diagram of Embodiment 3;

[0040] 1. Furnace body; 2. Gasification reaction chamber; 3. Environmental protection heating device; 4. Cylinder shield; 5. Purified gas inlet; 6. Outer jacket pipe; 7. Ash collection equipment; 8. Pyrolysis gas outlet; 9. Drain port; 10. Screening device body; 11. Partition; 12. Ash screening discharge port 1; 13. Ash screening discharge port 2; 14. Feed pipe; 15. Feed port; 16. Motor; 17. Screw feeder; 18. Feed port 1; 19. Reducer; 20. Coupling; 21. Pre-pyrolysis reactor; 22. Biomass feed pipeline; 23. Pyrolysis gas pipeline; 24. Condenser; 25. Pyrolysis gas production pipeline; 26. Condensate production pipeline; 27. Condensate tank; 28. Condensate tank top pipeline; 29. ​​Gasifier bottom production pipeline; 30. Condensate tank production pipeline. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 The specific implementation of the present invention is described in detail. It should be noted that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0042] Embodiment 1:

[0043] like Figure 1As shown, the present application provides a novel biomass pyrolysis gasification furnace, including a furnace body 1, which can be cylindrical or conical, etc. The outer shell of the furnace body 1 is insulated, and the material of the furnace body 1 is made of high-temperature resistant material (nickel-based alloy, cobalt-based alloy, 310S stainless steel, alumina ceramic, etc.) or carbon steel coated with refractory material; a gasification reaction chamber 2 is arranged in the furnace body 1, and the gasification reaction chamber 2 is a beveled cylindrical or beveled cubic shape, etc., and needs to adopt high-temperature resistant materials, such as graphite plates, cast iron plates, and specially treated optical glass and high-temperature resistant heat-insulating coating materials, etc. The high-temperature resistant materials can withstand the high temperature generated by heating to ensure the stability and safety of the gasification process; a feeding device is arranged on the upper and / or lower part of the gasification reaction chamber 2, and the biomass raw material is introduced into the furnace body 1 through the feeding device; an environmentally friendly heating device 3 is installed on the top of the furnace body 1 at the upper part of the gasification reaction chamber 2, and the environmentally friendly heating device 3 adopts an excitation At least one of a light emitter and a hydrogen flame combustion device. In this embodiment, a laser emitter is used. The laser emitter focuses the laser beam into the gasification reaction chamber 2 through a laser control device to form a light spot to heat and pyrolyze the biomass in the gasification reaction chamber 2. Laser heating does not involve a chemical combustion process, which can reduce the emission of pollutants. The hydrogen flame combustion device is a nozzle ignition device that uses hydrogen as fuel and oxygen as a combustion aid. The hydrogen combustion flame heats the biomass in the gasification reaction chamber 2. As a clean energy source, the hydrogen flame mainly produces water as a combustion product, and almost no other invalid gases are produced, which can also reduce the emission of pollutants. When the hydrogen flame combustion device is used, the combustible gas source of the flame can be biomass pyrolysis gas, hydrogen, methane, and any proportion of mixed gases or other green sustainable fuel gases. The combustion-supporting gas is mainly oxygen. In order to ensure safety, hydrogen is excessive, and CO 2As an inert explosion-proof gas, it can effectively control the temperature of the flame during high-temperature combustion and improve the pyrolysis and gasification efficiency of biochar; preferably, a barrel shield 4 is provided on the outside of the laser emitter, and a purified gas inlet 5 is provided on one side of the barrel shield 4, and the purified gas inlet 5 extends to the outside of the furnace body 1, and the purified pyrolysis gas or carbon dioxide gas is introduced into the barrel shield 4 through the purified gas inlet 5, and positive pressure turbulence is performed on the flue gas generated by pyrolysis in the furnace body 1 to prevent the flue gas and tar substances from contacting the lens of the laser emitter, causing contamination of the laser emitter lens and affecting the heating effect; the above-mentioned environmentally friendly heating device 3 adopts flame and laser forms to reduce pollution In order to reduce emissions and energy consumption, an outer jacket pipe 6 is provided on the outside of the gasification reaction chamber 2. The outer jacket pipe 6 passes through the bottom of the furnace body 1 and is connected to the ash collection device 7. The ash collection device 7 adopts an ash collection cabinet. The ash generated by pyrolysis is discharged along the outer jacket pipe 6 and enters the ash collection cabinet. The design of the ash collection device 7 collects and recycles the ash and the biomass that has not been pyrolyzed and gasified, and then the biomass that has not been pyrolyzed and gasified is screened and recovered through a screening device, thereby improving the utilization rate of resources and meeting the requirements of environmental protection and energy saving. A pyrolysis gas outlet 8 and a sewage outlet 9 are respectively provided on one side and the bottom of the furnace body 1. The generated biomass pyrolysis gas (mainly composed of CO, CO 2 , CH 4 The waste liquid generated in the furnace body 1 is discharged from the drain port 9 and then goes to the subsequent process section for purification and other treatments through the pyrolysis gas outlet 8 .

[0044] Preferably, the lower part of the ash collecting equipment 7 is connected to an ash screening device, and the ash screening device includes a screening device body 10, and a partition 11 is arranged in the screening device body 10, and an ash screening discharge port 12 is arranged at the bottom of one side of the partition 11, and an ash screening discharge port 2 13 is arranged at the bottom of the other side of the partition 11. More preferably, the ash screening discharge port 2 13 is arranged at an angle; the ash in the ash collection cabinet may contain ungasified biomass raw materials, and an ash screening device can be used to screen and recover the ash particles according to the size and weight differences; the coordinated arrangement of the outer jacket pipe 6 and the ash screening device makes the discharge and recovery of ash more efficient and reduces the waste of incompletely gasified raw materials.

[0045] Preferably, if Figure 2 As shown, a furnace body 1 can be provided with multiple environmentally friendly heating devices 3, and correspondingly with multiple feeding devices and gasification reaction chambers 2, and in this way the production capacity of the gasifier can be increased, such as Figure 2 As shown, five environmentally friendly heating devices 3, five gasification reaction chambers 2, and five feeding devices are provided.

[0046] Embodiment 2:

[0047] In this embodiment, a feeding device is provided at both the upper part and the lower part of the gasification reaction chamber 2:

[0048] Specifically: the feeding device arranged on the upper part of the gasification reaction chamber 2 includes a feeding pipe 14 connected to the gasification reaction chamber 2, the feeding pipe 14 extends to the outside of the furnace body 1, and the end of the feeding pipe 14 located on the outside of the furnace body 1 is connected to a feeding port 15. In order to facilitate the addition of materials, the feeding port 15 adopts a funnel-type feeding port.

[0049] The feeding device arranged at the lower part of the gasification reaction chamber 2 includes a motor 16, the output end of the motor 16 is connected to the screw feeder 17 through a coupling 20, the screw feeder 17 is provided with a feed port 18, and the feed port 18 adopts a funnel-type feed port, and the screw feeder 17 is connected to the gasification reaction chamber 2; in order to reduce the rotation speed of the screw feeder 17, a reducer 19 is arranged between the motor 16 and the screw feeder 17, and the motor 16 and the reducer 19, and the reducer 19 and the screw feeder 17 are all connected through a coupling 20.

[0050] The feeding method of the lower part of the gasification reaction chamber 2 is as follows: the biomass raw material is added to the screw feeder 17 through the feed port 18, and the motor 16 drives the screw feeder 17 to rotate, and the material is transported to the gasification reaction chamber 2 for heating and gasification. This material transportation ensures the stable transportation of the biomass raw material; the feeding method of the upper part of the gasification reaction chamber 2 is as follows: the feed port 15 is set at the upper part of the gasification reaction chamber 2, and the feed pipe 14 is directly introduced into the upper end of the gasification reaction chamber 2. After the biomass is added from the feed port 15, it flows into the gasification reaction chamber 2 by its own gravity for pyrolysis and gasification. This feeding method can effectively save mechanical energy.

[0051] Embodiment three:

[0052] In order to improve the pyrolysis efficiency of biomass, a pre-pyrolysis reactor 21 is added in the present embodiment, and the biomass is heated before feeding. Specifically: the feeding device is connected to the pre-pyrolysis reactor 21, and the pre-pyrolysis reactor 21 is connected to the biomass feeding pipeline 22, and the output end of the pre-pyrolysis reactor 22 is respectively connected to the feed port 15 and the feed port 18.

[0053] Preferably, the present embodiment utilizes the biomass pyrolysis gas to provide heat for the biomass in the pre-pyrolysis reactor 21, thereby improving the utilization efficiency of the biomass pyrolysis gas. Specifically, the pyrolysis gas outlet 8 of the gasification reaction chamber 2 is connected to an input end of the pre-pyrolysis reactor 21 through a pyrolysis gas pipeline 23, and an output end of the pre-pyrolysis reactor 21 is connected to a condenser 24. The condenser 24 is connected with a pyrolysis gas production pipeline 25 and a condensate production pipeline 26. The biomass pyrolysis gas generated by biomass pyrolysis enters the pre-pyrolysis reactor 21 through the pyrolysis gas outlet 8, providing heat for the biomass in the pre-pyrolysis reactor 21 to dry the water. The biomass pyrolysis gas after heat exchange enters the condenser 24 for condensation, and the uncondensed biomass pyrolysis gas is produced through the pyrolysis gas production pipeline 25 and enters the subsequent process. The condensed condensate is produced through the condensate production pipeline 26.

[0054] More preferably, the condensate production pipeline 26 is connected to the condensate tank 27, and the top of the condensate tank 27 is connected to the pyrolysis gas production pipeline 25 through the condensate tank top pipeline 28. Further, the sewage outlet 9 is connected to the condensate tank 27 through the gasifier bottom production pipeline 29; the condensed condensate enters the condensate tank 27 through the condensate production pipeline 26, and the liquid phase in the furnace body 1 enters the condensate tank 27 through the sewage outlet 9. After separation in the condensate tank 27, the gas phase is produced as biomass pyrolysis gas, and the liquid phase is produced through the condensate tank production pipeline 30 and discharged directly, or enters the subsequent process for treatment. The technicians make corresponding choices according to the specific circumstances.

[0055] Embodiment 4:

[0056] This embodiment provides a biomass pyrolysis and gasification method, comprising the following steps:

[0057] S1: biomass is introduced into the gasification reaction chamber 2; biomass is introduced into the upper part or / and the lower part of the gasification reaction chamber 2, specifically: the feeding method of the lower part of the gasification reaction chamber 2 is: the biomass raw material is added to the screw feeder 17 through the feed port 18, and the motor 16 drives the screw feeder 17 to rotate, and the material is transported to the gasification reaction chamber 2 for heating and gasification. This material transportation ensures the stable transportation of the biomass raw material; the feeding method of the upper part of the gasification reaction chamber 2 is: the feed port 15 is set at the upper part of the gasification reaction chamber 2, and the feed pipe 14 is directly introduced into the upper end of the gasification reaction chamber 2. After the biomass is added from the feed port 15, it flows into the gasification reaction chamber 2 by its own gravity for pyrolysis and gasification. This feeding method can effectively save mechanical energy; preferably, the biomass raw material enters the pre-pyrolysis reactor 21 for drying treatment first, and the treated biomass enters the gasification reaction chamber 2 through the feed port 18 and / or the feed port 15;

[0058] S2: The environmentally friendly heating device 3 heats the biomass in the gasification reaction chamber 2 to perform pyrolysis of the biomass; the environmentally friendly heating device 3 uses a laser emitter and / or a hydrogen flame combustion device, and the laser emitter focuses the laser beam into the gasification reaction chamber 2 through a laser control device to form a light spot to heat and pyrolyze the biomass in the gasification reaction chamber 2; the hydrogen flame combustion device uses hydrogen as fuel and oxygen as a nozzle ignition device for a combustion aid, and the hydrogen combustion flame heats the biomass in the gasification reaction chamber 2; when the hydrogen flame combustion device is used, the source of the combustible gas of the flame is referred to in Example 1, and no specific description is given here. In addition, the same as Example 1 CO 2 As an inert explosion-proof gas, it can effectively control the flame temperature during high-temperature combustion and improve the pyrolysis and gasification efficiency of biochar;

[0059] S3: The pyrolysis gas generated by the pyrolysis of biomass is produced from the pyrolysis gas outlet 8, and the waste liquid generated by the pyrolysis of biomass is discharged through the sewage outlet 9; preferably, the pyrolysis gas generated by the pyrolysis of biomass enters the pre-pyrolysis reactor 21 through the pyrolysis gas outlet 8, provides heat for the biomass in the pre-pyrolysis reactor 21, and dries the water, and the biomass pyrolysis gas after heat exchange enters the condenser 24 for condensation, and the uncondensed biomass pyrolysis gas is produced through the pyrolysis gas production pipeline 25 and enters the subsequent process, and the condensed condensate is produced through the condensate production pipeline 26; more preferably, the condensed condensate enters the condensate tank 27 through the condensate production pipeline 26, and the waste liquid generated by the pyrolysis of biomass enters the condensate tank 27 through the sewage outlet 9. After separation in the condensate tank 27, the gas phase is produced as the biomass pyrolysis gas, and the liquid phase is produced through the condensate tank production pipeline 30, and is directly discharged, or enters the subsequent process for treatment. The technicians make corresponding choices according to the specific situation;

[0060] S4: Ash generated by biomass pyrolysis gas enters the outer jacket pipe 6 along the top of the gasification reaction chamber 2, and flows into the ash collecting device 7 along the outer jacket pipe 6. After the ash collecting device 7 is full, it is processed.

[0061] Embodiment five:

[0062] Compared with the third embodiment, the present embodiment also includes S5: when the ash collecting device 7 collects a certain amount of ash, the ash enters the ash screening device from the bottom end of the ash collecting device 7, and the ash is screened by the ash screening device to separate the unpyrolyzed biomass from the ash, and the ash is discharged from the ash screening discharge port 1 12 and the ash screening discharge port 2 13 respectively; the unpyrolyzed biomass is recovered and mixed with the biomass raw material and continues to be added to the gasification reaction chamber 2.

[0063] The working principle of the present invention is as follows: biomass is fed into the screw feeder 17 through the feed port 18, and the motor 16 drives the screw feeder 17 to transport the biomass to the gasification reaction chamber 2, or / and the biomass is directly fed into the gasification reaction chamber 2 through the feed port 15 and the feed pipe 14 for pyrolysis and gasification; the environmentally friendly heating device 3 heats the biomass in the gasification reaction chamber 2, pyrolyzes the biomass, and the generated biomass pyrolysis gas is extracted from the pyrolysis gas outlet 8 to the subsequent process section for treatment, and the waste liquid generated in the furnace body 1 is discharged from the sewage outlet 9. Out; the ash produced by the pyrolysis and gasification of biomass enters the outer jacket pipe 6 along the oblique cut of the gasification reaction chamber 2, and flows into the ash collection cabinet along the outer jacket pipe 6. When the ash collection cabinet collects a certain amount of ash, the ash enters the ash screening device from the bottom of the collection cabinet, and the ash is screened by the ash screening device to separate the unpyrolyzed biomass from the ash, and the ash is discharged from the ash screening discharge port 1 12 and the ash screening discharge port 2 13 respectively. The unpyrolyzed biomass is recovered and mixed with the biomass raw material to continue to be added to the gasification reaction chamber 2.

[0064] This application uses laser emitter heating, which has the following advantages:

[0065] (1) Improve gasification efficiency and gas quality: Laser heating or hydrogen flame heating can achieve faster and more uniform heating, thereby improving the gasification efficiency of biomass; because the heating process is more uniform and controllable, it can reduce the generation of tar and other impurities, thereby improving the quality of gas;

[0066] (2) Reduce energy consumption: Laser heating and hydrogen flame heating are both high-energy-density heat sources, which can reduce energy loss during the heating process, thereby reducing overall energy consumption;

[0067] (3) Reduce pollution: Hydrogen flame is a clean energy source, and its combustion product is mainly water, and almost no other invalid gases are produced. Laser heating does not involve chemical combustion process, so it can reduce pollutant emissions;

[0068] (4) Flexible operation: Laser heating and hydrogen flame heating can be precisely controlled as needed, providing better operational flexibility and reaction controllability;

[0069] (5) System safety: The entire gasification system is operated under positive pressure, which greatly reduces the risk of system explosion and improves system safety;

[0070] (6) Reduce secondary pollution and improve energy resource utilization: Through the design of the gasification reaction chamber and the optimization of the ash collection equipment, the utilization rate of energy resources can be improved and the waste of energy resources can be reduced;

[0071] (7) Improving the utilization rate of biomass pyrolysis gas. The biomass pyrolysis gas is used to preheat the biomass in the pre-pyrolysis reactor, thereby improving the thermal energy utilization rate of the biomass pyrolysis gas and also improving the pyrolysis efficiency.

[0072] The devices, connection relationships, etc. not specifically described above all belong to the prior art and will not be described in detail in the present invention.

[0073] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings; however, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0074] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the various possible combinations of this application will not be described separately.

[0075] In addition, the various implementation modes of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A biomass pyrolysis gasification furnace, comprising a furnace body (1), characterized in that: A gasification reaction chamber (2) is arranged in the furnace body (1), a feeding device is arranged at the upper part and / or the lower part of the gasification reaction chamber (2), an environmental protection heating device (3) is installed at the upper part of the gasification reaction chamber (2) at the top of the furnace body (1), an outer jacket pipe (6) is arranged on the outer side of the gasification reaction chamber (2), and the outer jacket pipe (6) passes through the bottom of the furnace body (1) and is connected to an ash collection device (7); a pyrolysis gas outlet (8) and a sewage outlet (9) are respectively arranged on one side and the bottom of the furnace body (1).

2. The biomass pyrolysis gasification furnace according to claim 1, characterized in that: The feeding device arranged at the upper part of the gasification reaction chamber (2) comprises a feeding pipeline (14) communicating with the gasification reaction chamber (2), and the end of the feeding pipeline (14) is connected to a feeding port (15).

3. The biomass pyrolysis gasification furnace according to claim 1, characterized in that: The feeding device arranged at the lower part of the gasification reaction chamber (2) comprises a motor (16), the output end of the motor (16) is connected to a screw feeder (17), the screw feeder (17) is provided with a feeding port 1 (18), and the screw feeder (17) is connected to the gasification reaction chamber (2).

4. The biomass pyrolysis gasification furnace according to claim 1, characterized in that: The feeding device is connected to the pre-pyrolysis reactor (21).

5. The biomass pyrolysis gasification furnace according to claim 4, characterized in that: The pyrolysis gas outlet (8) of the gasification reaction chamber (2) is connected to an input end of a pre-pyrolysis reactor (21) via a pyrolysis gas pipeline (23); an output end of the pre-pyrolysis reactor (21) is connected to a condenser (24); and the condenser (24) is connected to a pyrolysis gas extraction pipeline (25) and a condensate extraction pipeline (26).

6. The biomass pyrolysis gasification furnace according to claim 5, characterized in that: The sewage outlet (9) is connected to the condensate tank (27) via a gasifier bottom extraction pipeline (29), the top of the condensate tank (27) is connected to the pyrolysis gas extraction pipeline (25) via a condensate tank top pipeline (28), and a condensate tank extraction pipeline (30) is provided at the bottom of the condensate tank (27).

7. A biomass pyrolysis and gasification method using a biomass pyrolysis and gasification furnace according to any one of claims 1 to 6, characterized in that: The steps include: S1: biomass is introduced into the gasification reaction chamber (2); S2: The environmentally friendly heating device (3) heats the biomass in the gasification reaction chamber (2) to perform pyrolysis of the biomass; S3: The pyrolysis gas generated by the pyrolysis of biomass is extracted from the pyrolysis gas outlet (8), and the waste liquid generated by the pyrolysis of biomass is discharged through the sewage outlet (9); S4: Ash generated by the biomass pyrolysis gas enters the outer jacket pipe (6) along the top of the gasification reaction chamber (2), and flows into the ash collection device (7) along the outer jacket pipe (6).

8. The biomass pyrolysis and gasification method according to claim 7, characterized in that: After being preheated in the pre-pyrolysis reactor (21), the biomass enters the gasification reaction chamber (2).

9. The biomass pyrolysis and gasification method according to claim 8, characterized in that: The pyrolysis gas generated by the pyrolysis of the biomass enters the pre-pyrolysis reactor (21) through the pyrolysis gas outlet (8), providing preheating heat for the biomass in the pre-pyrolysis reactor (21).

10. The biomass pyrolysis and gasification method according to claim 8, characterized in that: The pyrolysis gas after heat exchange enters the condenser (24), the biomass pyrolysis gas is extracted from the top of the condenser (24), and the condensate is extracted from the bottom of the condenser (24).

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