A biomass low temperature hydrogen production equipment

Abstract

The present invention belongs to the technical field of hydrogen production, and specifically refers to a biomass low-temperature hydrogen production device, including a gasification chamber, a reaction center and a separator, wherein the feed inlet of the reaction center is connected to the discharge port of the gasification chamber, and the feed inlet of the separator is connected to the discharge port of the reaction center. The gasification chamber is used to steam the biomass raw material to produce a high-temperature gas rich in hydrogen. After the high-temperature gas is cooled by the reaction center in multiple stages, it reacts with the reaction enzyme at low temperature to produce hydrogen. The hydrogen and the residual mixed gas are transported to the separator, and pure hydrogen is obtained by separation. The present invention recycles the heat energy of the pyrolysis gas through the waste heat recovery unit, so that the pyrolysis gas is cooled in reverse, and then the pressure in the reaction enzyme space is reduced to evaporate the water at low temperature, thereby realizing a low-temperature and high-humidity environment, so as to improve the hydrogen conversion efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen production, and specifically refers to a biomass low-temperature hydrogen production device. Background Art

[0002] As the demand for clean energy continues to increase, biomass hydrogen production technology has attracted much attention as a potential renewable energy solution. Biomass refers to plant or animal materials that store chemical energy and solar energy, and has traditionally been widely used in heat generation or various industrial processes. Biomass contains a large amount of hydrogen, which is an excellent raw material for hydrogen production and has rich recycling value.

[0003] Biomass hydrogen production technology can be divided into high-temperature hydrogen production and low-temperature hydrogen production according to temperature. Among them, the temperature of low-temperature hydrogen production is generally 15-25 degrees. The lower temperature can effectively inhibit the production of methane during the reaction, thereby improving the conversion efficiency of hydrogen. Therefore, low-temperature biomass hydrogen production technology has its unique development advantages compared to high-temperature biomass hydrogen production technology.

[0004] However, when producing hydrogen at low temperature, the biomass must first be cooked and pyrolyzed in the gasification chamber. The gas produced by pyrolysis needs to be reduced to 15-25 degrees before it can contact and react with the reaction enzyme. In this process, the heat energy of the pyrolysis gas cannot be used, and more energy must be consumed to offset this part of the heat, reducing the efficiency of energy utilization; at the same time, when producing hydrogen at low temperature, a certain humidity must be maintained. The reaction enzyme has a higher reaction efficiency and a better hydrogen conversion rate in a low temperature and high humidity environment. However, low temperature and high humidity are contrary to traditional high temperature and high humidity. When the temperature is low, water is not easy to evaporate and it is not easy to form a high humidity environment.

[0005] The above problems need to be improved. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a biomass low-temperature hydrogen production equipment, which recycles the heat energy of the pyrolysis gas through a waste heat recovery unit, so that it can cool the pyrolysis gas in reverse, and then reduce the pressure in the reaction enzyme space to evaporate the water at low temperature, thereby achieving a low temperature and high humidity environment, so as to improve the hydrogen conversion efficiency.

[0007] The technical solution adopted by the present invention is as follows: A biomass low-temperature hydrogen production device proposed in the present invention includes a gasification chamber, a reaction center and a separator. The feed inlet of the reaction center is connected to the feed outlet of the gasification chamber, and the feed inlet of the separator is connected to the feed outlet of the reaction center. The gasification chamber is used to cook the biomass raw material to produce high-temperature gas rich in hydrogen. After the high-temperature gas is cooled in multiple stages by the reaction center, it reacts with the reaction enzyme at low temperature to produce hydrogen. The hydrogen and the residual mixed gas are transported to the separator and separated to obtain pure hydrogen.

[0008] Furthermore, the reaction center includes a hydrogen production unit, a temperature and humidity control unit, a waste heat recovery unit and a vacuum pump. The hydrogen production unit is connected to the discharge port of the gasification chamber, the temperature and humidity control unit is arranged on the outer wall of the hydrogen production unit, the waste heat recovery unit is arranged on the side of the hydrogen production unit away from the gasification chamber, the vacuum pump is arranged on the upper part of the side wall of the hydrogen production unit, and an on-off valve is arranged at the upper end of the hydrogen production unit, the on-off valve is used to control the discharge port of the hydrogen production unit, the hydrogen production unit is divided into multiple cooling spaces, and the high-temperature pyrolysis gas generated in the gasification chamber is subjected to multiple cooling treatments. The topmost and bottommost spaces of the hydrogen production unit are filled with water, the pyrolysis gas contacts the water in the bottommost space to exchange energy, and the water is evaporated into a gaseous state to take away heat, thereby achieving initial cooling. This heat can be utilized by the waste heat recovery unit, and then the water vapor is cooled in reverse to make it The water evaporates at low pressure when the space pressure is between 1700 Pa and 3200 Pa, and the boiling point of water is between 15 and 25 degrees, which matches the optimal reaction temperature of the enzyme. After multi-stage cooling and adjustment by the temperature and humidity control unit, the pyrolysis gas undergoes a chemical reaction with the enzyme under low pressure, thereby achieving the effect of low-temperature hydrogen production. The temperature and humidity control unit can adjust the environmental conditions of each space inside the hydrogen production unit, which can not only protect the enzyme from heat loss, but also increase the humidity, so that the reaction conditions of the enzyme reach the optimal state.

[0009] Furthermore, the waste heat recovery unit includes a support rod, an air intake fan, an induced ejection amplifier, a steam pipe, a pressure valve, a steam fan, a conveyor belt and a heat sink. The support rod is arranged on the side wall of the hydrogen production unit away from the vaporization chamber. The air intake fan is rotatably arranged at the center of the support rod. The induced ejection amplifier is arranged on the air intake fan. The induced ejection amplifier completely covers the blades of the air intake fan. The steam pipe is arranged at the bottom of the side wall of the hydrogen production unit near the support rod. The steam pipe is connected to the bottom end of the hydrogen production unit. The water vapor generated in the primary cooling space at the bottom of the hydrogen production unit can be transported to the steam pipe. The pressure valve is arranged on the steam pipe. The pressure valve is used to control the pressure of the gas in the steam pipe. It can only be opened when it reaches a certain pressure threshold to maintain sufficient steam pressure. The steam fan is rotatably arranged at On the side wall of the pressure valve, the conveyor belt is connected between the steam fan and the air intake fan, the air inlet of the heat sink is arranged on the side wall of the steam fan, the steam fan can rotate relative to the air inlet of the heat sink, the air outlet of the heat sink is connected to the bottom of the side wall of the hydrogen production unit close to the vaporization chamber through a pipeline, the air outlet of the heat sink is connected to the cooling space at the bottom of the hydrogen production unit, the water vapor in the cooling space at the bottom of the hydrogen production unit enters the steam pipe, when the steam pressure exceeds a certain value, the pressure valve opens, the internal steam rushes out, and drives the steam fan to rotate, and then drives the air intake fan to rotate through the conveyor belt, the wind energy inhaled by the air intake fan is multiplied by the induced amplifier, producing an air induced effect, more low-temperature cold air from the outside acts on the heat sink, so that the water vapor is cooled and condensed, completing the cycle.

[0010] Furthermore, the hydrogen production unit includes a reaction box, a primary condenser, a retention pipe and an anti-filling pipe. The reaction box is connected to the gasification chamber. The primary condenser is arranged at the bottom of the reaction box. The pyrolysis gas enters the primary condenser from the gasification chamber. The primary condenser is used to initially cool the pyrolysis gas. The retention pipe is arranged in the middle of the reaction box. The retention pipe is connected to the primary condenser. The retention pipe performs secondary cooling on the pyrolysis gas. The anti-filling pipe is arranged at the upper end of the reaction box. The anti-filling pipe is in an inverted U shape. The bottom end array of the anti-filling pipe is provided with exhaust holes. When the pyrolysis gas is discharged from the exhaust holes, the anti-filling pipe It can also prevent water in the space where the reaction enzyme is located from flowing back from the exhaust hole to the space below; a temperature sensor 1 is provided through the area where the side wall of the reaction box and the retention tube are adapted, and the temperature sensor 1 is used to confirm the temperature of the cooling zone of the retention tube; a temperature sensor 2 and a humidity sensor are provided through the area where the side wall of the reaction box and the anti-flowing tube are adapted, respectively, and the temperature sensor 2 and the humidity sensor are used to confirm the temperature and humidity in the space where the reaction enzyme is located, and the humidity sensor can feed back the measurement signal to the vacuum pump, and the vacuum pump controls the pressure change according to the change of humidity in the current space, thereby adjusting the evaporation rate of water; The reaction box is provided with a first layer of plates, the first layer of plates is provided with a second layer of plates, the second layer of plates is provided with vent holes in an array, the vent holes are connected to the bottom of the anti-flooding pipe, the area below the first layer of plates is a primary cooling area, this area is filled with water, the pyrolysis gas enters the primary condensing tube and exchanges heat with the water to achieve initial cooling, the water evaporates into a gaseous state, enters the steam pipe of the waste heat recovery unit, and drives the steam fan to rotate, so as to achieve waste heat recovery; after the pyrolysis gas is initially cooled, it enters the retention pipe, the retention pipe can keep the gas for a long time, and the gas is cooled for the second time, and the pyrolysis gas is cooled for the second time. After warming up, it enters the anti-irrigation pipe from the vent hole, and then enters the area above the second layer of the plate from the exhaust hole. This area is the chemical reaction area and is filled with water. Its temperature should be controlled between 15-25 degrees, and the pressure should be controlled between 1700pa-3200pa, so as to achieve a low temperature and high humidity environment and promote the conversion efficiency of hydrogen; temperature sensor 1 measures the temperature of the retention tube area to make it fluctuate within a safe range to prevent the next level of low-temperature reaction enzyme from being damaged due to excessive temperature. Temperature sensor 2 and humidity sensor are used to measure the temperature and humidity in the chemical reaction area to keep them within a reasonable range.

[0011] Furthermore, the temperature and humidity control unit includes an air compressor, a dual-pipe, an upper expansion valve, a lower expansion valve, a condensing fan and a condenser. The air compressor is arranged on the side wall of the reaction box, the dual-pipe is arranged on the air compressor, the upper water distribution pipe of the dual-pipe is connected to the area where the anti-flooding pipe is located in the reaction box, the lower water distribution pipe of the dual-pipe is connected to the area where the retention pipe is located in the reaction box, the upper expansion valve is arranged in the upper water distribution pipe of the dual-pipe, the lower expansion valve is arranged in the lower water distribution pipe of the dual-pipe, the condenser is connected between the reaction box and the air compressor through a pipeline, and the condensing fan is arranged near the condenser to the reaction box. On the inner side, the number of condensers and condensing fans is adapted to the number of cooling spaces above the first layer of plates in the reaction box. An evaporator is also provided inside the reaction box. The air inlet of the evaporator is connected to the upper water distribution pipe and the lower water distribution pipe respectively, and the air outlet of the evaporator is connected to the condenser. The number and position of the evaporators are adapted to the condenser. The temperature and humidity control unit is filled with refrigerant. Under the action of the air compressor, the refrigerant circulates and switches between gas and liquid and takes away heat to achieve a refrigeration effect. By adjusting the upper expansion valve and the lower expansion valve, the cold air flow in the corresponding area can be changed, thereby adjusting the temperature inside the reaction box.

[0012] Furthermore, the steam fan is provided with inner fan blades, which will rotate when pushed by steam and drive the steam fan to rotate, and the steam fan drives the air intake fan to rotate through a conveyor belt; the side wall of the induced air amplifier is provided with a housing shell, and the air intake fan is arranged in the housing shell. The inner cavity of the induced air amplifier is surrounded by an annular air channel, and the inner side of the annular air channel is provided with an induced air slit. When the air intake fan rotates, external cold air will be blown into the annular air channel, and the cold air will flow along the annular air channel and flow out from the induced air slit. Because the gap of the induced air slit is small, the flow velocity here increases and the pressure decreases. Driven by atmospheric pressure, the external cold air quickly rushes into the center of the induced air amplifier, resulting in an air induced effect. The induced cold air is applied to the heat sink, and a larger wind force is introduced through a smaller wind force, thereby achieving a better cooling effect.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows:

[0014] 1. The interior of the hydrogen production unit is set as a multi-level space to cool the pyrolysis gas in layers. When the pyrolysis gas is cooled for the first time, a large amount of heat energy can be transferred to the cooling water, causing the cooling water to evaporate into gaseous state so that it can be recycled by the waste heat recovery unit. The subsequent multi-level cooling combined with the adjustment of the temperature and humidity control unit can better protect the low-temperature reaction enzyme and prevent the reaction enzyme from being damaged due to direct contact with high-temperature gas;

[0015] 2. The waste heat recovery unit can utilize the steam energy of the coolant, which drives the steam fan to rotate and converts it into the kinetic energy of the intake fan;

[0016] 3. The air intake fan can draw external wind energy into the induced amplifier. The induced amplifier uses the induced effect of air to blow more external wind energy onto the heat sink, accelerate the cooling of the heat sink, and accelerate the primary cooling of the pyrolysis gas;

[0017] 4. The vacuum pump can reduce the pressure in the reaction enzyme space, thereby reducing the boiling point of water, allowing water to evaporate at low temperatures, thereby increasing the humidity in the reaction enzyme space, achieving the effect of low temperature and high humidity, and improving hydrogen production efficiency;

[0018] 5. Since the pressure in the space where the reaction enzyme is located is relatively low, the anti-flooding pipe can both guide the gas below into the reaction space and prevent the water in the reaction space from flowing back into the space below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a biomass low-temperature hydrogen production device proposed by the present invention;

[0020] Figure 2 is a schematic diagram of the structure of the reaction center;

[0021] Figure 3 This is an exploded view of the reaction center;

[0022] Figure 4 is a structural schematic diagram of a waste heat recovery unit;

[0023] Figure 5 It is a structural schematic diagram of the temperature and humidity control unit;

[0024] Figure 6 This is an exploded diagram of the waste heat recovery unit;

[0025] Figure 7 is a partial cross-sectional view of a hydrogen production unit;

[0026] Figure 8 is a schematic diagram of the structure of a steam fan;

[0027] Fig. 9 It is a partial cross-sectional view of the ejection amplifier;

[0028] Fig.10 This is the position relationship diagram of the primary condenser, retention tube and anti-flooding tube;

[0029] Fig.11 It is a schematic diagram of the structure of the anti-irrigation pipe;

[0030] Fig.12 A partial cross-sectional view of the reaction box.

[0031] Among them, 1. vaporization chamber, 2. reaction center, 3. separator, 4. hydrogen production unit, 5. temperature and humidity control unit, 6. waste heat recovery unit, 7. vacuum pump, 8. opening and closing valve, 9. support rod, 10. air intake fan, 11. injection amplifier, 12. steam pipe, 13. pressurizing valve, 14. steam fan, 15. conveyor belt, 16. heat sink, 17. air compressor, 18. two-piece pipe, 19. upper expansion valve, 20. lower expansion valve, 21. condensing fan, 22. condenser, 23. reaction box, 24. primary condensing pipe, 25. retention pipe, 26. anti-flooding pipe, 27. temperature sensor 1, 28. temperature sensor 2, 29. humidity sensor, 30. inner fan blade, 31. placement shell, 32. annular air duct, 33. injection seam, 34. exhaust hole, 35. first layer plate, 36. second layer plate, 37. vent.

[0032] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0035] like Figure 1 As shown, a biomass low-temperature hydrogen production device proposed in the present invention includes a gasification chamber 1, a reaction center 2 and a separator 3. The feed inlet of the reaction center 2 is connected to the feed outlet of the gasification chamber 1, and the feed inlet of the separator 3 is connected to the feed outlet of the reaction center 2. The gasification chamber 1 is used to cook the biomass raw material to produce a high-temperature gas rich in hydrogen. After the high-temperature gas is cooled in multiple stages by the reaction center 2, it reacts with the reaction enzyme at low temperature to produce hydrogen. The hydrogen and the residual mixed gas are transported to the separator 3 and separated to obtain pure hydrogen.

[0036] like Figure 1-Figure 3As shown, the reaction center 2 includes a hydrogen production unit 4, a temperature and humidity control unit 5, a waste heat recovery unit 6 and a vacuum pump 7. The hydrogen production unit 4 is connected to the discharge port of the gasification chamber 1. The temperature and humidity control unit 5 is arranged on the outer wall of the hydrogen production unit 4. The waste heat recovery unit 6 is arranged on the side of the hydrogen production unit 4 away from the gasification chamber 1. The vacuum pump 7 is arranged on the upper part of the side wall of the hydrogen production unit 4. An on-off valve 8 is arranged at the upper end of the hydrogen production unit 4. The on-off valve 8 is used to control the discharge port of the hydrogen production unit 4. The hydrogen production unit 4 is divided into multiple cooling spaces, and the high-temperature pyrolysis gas generated by the gasification chamber 1 is subjected to multiple cooling treatments. The topmost and bottommost spaces of the hydrogen production unit 4 are filled with water. The pyrolysis gas contacts the water in the bottommost space to exchange energy, and evaporates the water into a gaseous state to take away heat, thereby achieving initial cooling. This heat can be utilized by the waste heat recovery unit 6, and then the water vapor is cooled in reverse. It is re-condensed into liquid, thereby achieving the effect of cyclic cooling; the space at the top level of the hydrogen production unit 4 is also filled with a reaction enzyme, and the optimal reaction temperature of the reaction enzyme is between 15-25 degrees. The vacuum pump 7 is connected to the space where the reaction enzyme is located. The vacuum pump 7 is used to adjust the pressure in the reaction enzyme space so that water can evaporate under low pressure. When the space pressure is between 1700Pa-3200Pa, the boiling point of water is between 15-25 degrees, which is adapted to the optimal reaction temperature of the reaction enzyme. After multi-stage cooling and adjustment by the temperature and humidity control unit 5, the pyrolysis gas undergoes a chemical reaction with the reaction enzyme under low pressure, thereby achieving the effect of low-temperature hydrogen production; the temperature and humidity control unit 5 can adjust the environmental conditions of each space inside the hydrogen production unit 4, which can not only protect the reaction enzyme and prevent it from heat loss, but also increase the humidity so that the reaction conditions of the reaction enzyme reach the optimal state.

[0037] like Figure 1 , Figure 3 , Figure 4 and Figure 6As shown, the waste heat recovery unit 6 includes a support rod 9, an air intake fan 10, an induced emission amplifier 11, a steam pipe 12, a pressure valve 13, a steam fan 14, a conveyor belt 15 and a heat sink 16. The support rod 9 is arranged on the side wall of the hydrogen production unit 4 away from the vaporization chamber 1. The air intake fan 10 is rotatably arranged at the center of the support rod 9. The induced emission amplifier 11 is arranged on the air intake fan 10. The induced emission amplifier 11 completely covers the blades of the air intake fan 10. The steam pipe 12 is arranged at the bottom of the side wall of the hydrogen production unit 4 near the support rod 9. The steam pipe 12 is connected to the bottom end of the hydrogen production unit 4. The water vapor generated in the primary cooling space at the bottom of the hydrogen production unit 4 can be transported to the steam pipe 12. The pressure valve 13 is arranged on the steam pipe 12. The pressure valve 13 is used to control the pressure of the gas in the steam pipe 12. It can only be opened when it reaches a certain pressure threshold to keep the steam pressure sufficient. The steam fan 14 is rotatably arranged at On the side wall of the pressure valve 13, the conveyor belt 15 is connected between the steam fan 14 and the air intake fan 10, the air inlet of the heat sink 16 is arranged on the side wall of the steam fan 14, the steam fan 14 can rotate relative to the air inlet of the heat sink 16, the air outlet of the heat sink 16 is connected to the bottom of the side wall of the hydrogen production unit 4 close to the vaporization chamber 1 through a pipeline, the air outlet of the heat sink 16 is connected to the cooling space at the bottom of the hydrogen production unit 4, the water vapor in the cooling space at the bottom of the hydrogen production unit 4 enters the steam pipe 12, when the steam pressure exceeds a certain value, the pressure valve 13 opens, the internal steam rushes out, and drives the steam fan 14 to rotate, and then drives the air intake fan 10 to rotate through the conveyor belt 15, the wind energy inhaled by the air intake fan 10 is multiplied by the induced amplifier 11, producing an air induced effect, more low-temperature cold air from the outside acts on the heat sink 16, so that the water vapor is cooled and condensed, completing the cycle.

[0038] like Figure 7 , Fig.10 , Fig.11 and Fig.12As shown, the hydrogen production unit 4 includes a reaction box 23, a primary condenser 24, a retention pipe 25 and an anti-filling pipe 26. The reaction box 23 is connected to the gasification chamber 1. The primary condenser 24 is arranged at the bottom of the reaction box 23. The pyrolysis gas enters the primary condenser 24 from the gasification chamber 1. The primary condenser 24 is used to initially cool the pyrolysis gas. The retention pipe 25 is arranged in the middle of the reaction box 23. The retention pipe 25 is connected to the primary condenser 24. The retention pipe 25 performs secondary cooling on the pyrolysis gas. The anti-filling pipe 26 is arranged at the upper end of the reaction box 23. The anti-filling pipe 26 is inverted U shape. The bottom end array of the anti-filling pipe 26 is provided with exhaust holes 34. When the pyrolysis gas is discharged from the exhaust holes 34, The anti-irrigation pipe 26 can also prevent the water in the space where the reaction enzyme is located from flowing back into the space below from the exhaust hole 34; the area where the side wall of the reaction box 23 and the retention pipe 25 are adapted is penetrated with a temperature sensor 27, and the temperature sensor 27 is used to confirm the temperature of the cooling zone of the retention pipe 25. The area where the side wall of the reaction box 23 and the anti-irrigation pipe 26 are adapted is penetrated with a temperature sensor 28 and a humidity sensor 29, respectively. The temperature sensor 28 and the humidity sensor 29 are used to confirm the temperature and humidity in the space where the reaction enzyme is located. The humidity sensor 29 can feed back the measurement signal to the vacuum pump 7, and the vacuum pump 7 controls the pressure change according to the change of humidity in the current space, thereby adjusting the water The reaction box 23 is provided with a first plate 35, a second plate 36 is provided on the first plate 35, and an array of vents 37 is provided on the second plate 36, the vents 37 are connected to the bottom of the anti-flooding pipe 26, and the area below the first plate 35 is a primary cooling area, which is filled with water. After the pyrolysis gas enters the primary condenser 24, it exchanges heat with the water to achieve initial cooling. The water evaporates into a gaseous state and enters the steam pipe 12 of the waste heat recovery unit 6, and drives the steam fan 14 to rotate, so as to achieve waste heat recovery. After the pyrolysis gas is initially cooled, it enters the retention pipe 25, and the retention pipe 25 can keep the gas for a long time, and the gas is cooled for the second time. After secondary cooling, the gas enters the anti-flooding tube 26 from the vent hole 37, and then enters the area above the second layer plate 36 from the exhaust hole 34. This area is a chemical reaction area and is filled with water. Its temperature should be controlled between 15-25 degrees, and the pressure should be controlled between 1700Pa-3200Pa to achieve a low temperature and high humidity environment and promote the conversion efficiency of hydrogen; the temperature sensor 1 27 measures the temperature of the retention tube 25 area to make it fluctuate within a safe range to prevent the next level of low-temperature reaction enzyme from being damaged due to excessive temperature. The temperature sensor 28 and the humidity sensor 29 are used to measure the temperature and humidity in the chemical reaction area to control them within a reasonable range.

[0039] like Figure 2 , Figure 3 and Figure 5As shown, the temperature and humidity control unit 5 includes an air compressor 17, a dual-pipe 18, an upper expansion valve 19, a lower expansion valve 20, a condensing fan 21 and a condenser 22. The air compressor 17 is arranged on the side wall of the reaction box 23, the dual-pipe 18 is arranged on the air compressor 17, the upper water distribution pipe of the dual-pipe 18 (not marked in the figure) is connected to the area where the anti-flooding pipe 26 is located in the reaction box 23, the lower water distribution pipe of the dual-pipe 18 (not marked in the figure) is connected to the area where the retention pipe 25 is located in the reaction box 23, the upper expansion valve 19 is arranged in the upper water distribution pipe of the dual-pipe 18, the lower expansion valve 20 is arranged in the lower water distribution pipe of the dual-pipe 18, the condenser 22 is connected between the reaction box 23 and the air compressor 17 through a pipeline, and the condensing fan 21 is arranged on the condenser. 22 is close to the inner side of the reaction box 23, the number of condensers 22 and condensing fans 21 is adapted to the number of cooling spaces above the first layer 35 in the reaction box 23, an evaporator (not shown in the attached figure) is also arranged inside the reaction box 23, the air inlet of the evaporator is respectively connected to the upper water distribution pipe and the lower water distribution pipe, the air outlet of the evaporator is connected to the condenser 22, the number and position of the evaporators are adapted to the condenser 22, the temperature and humidity control unit 5 is filled with refrigerant, under the action of the air compressor 17, the refrigerant circulates and switches between gas and liquid and takes away heat, so as to achieve the refrigeration effect, and by adjusting the upper expansion valve 19 and the lower expansion valve 20, the cold air flow in the corresponding area can be changed, thereby adjusting the temperature inside the reaction box 23.

[0040] like Figure 8 and Fig. 9 As shown, the steam fan 14 is provided with inner blades 30. When pushed by the steam, the inner blades 30 will rotate and drive the steam fan 14 to rotate. The steam fan 14 drives the intake fan 10 to rotate through the conveyor belt 15. The side wall of the induced amplifier 11 is provided with a placement shell 31. The intake fan 10 is arranged in the placement shell 31. The inner cavity of the induced amplifier 11 is surrounded by an annular airway 32. The inner side of the annular airway 32 is provided with an induced slit 33. When the intake fan 10 rotates, external cold air will be blown into the annular airway 32. The cold air flows along the annular airway 32 and flows out from the induced slit 33. Because the gap of the induced slit 33 is small, the flow velocity here increases and the pressure decreases. The external cold air is pushed by the atmospheric pressure and quickly flows into the center of the induced amplifier 11, generating an air induced effect. The induced cold air is acted on the heat sink 16, and a larger wind force is introduced through a smaller wind force to achieve a better cooling effect.

[0041] During specific operation, the biomass raw material is put into the gasification chamber 1 , and the biomass is cooked in the gasification chamber 1 to produce pyrolysis gas rich in hydrogen, and the pyrolysis gas will be transported to the reaction center 2 .

[0042] The lower end of the first plate 35 is filled with cooling water. When the pyrolysis gas enters the primary condenser 24, the cooling water will exchange heat with the pyrolysis gas in the primary condenser 24 to reduce the temperature of the pyrolysis gas. The cooling water evaporates into a gaseous state, and the pyrolysis gas continues to flow along the primary condenser 24 and reaches the retention tube 25 above to wait for secondary cooling.

[0043] At the same time, after the moisture under the first layer 35 is converted into steam, the water vapor enters the steam pipe 12. When the pressure of the water vapor reaches a certain value, the pressure valve 13 is opened, and the water vapor enters the heat sink 16. Under the action of the water vapor and the inner fan blades 30, the steam fan 14 rotates and drives the intake fan 10 to rotate through the conveyor belt 15. When the intake fan 10 rotates, the external gas is blown into the annular airway 32 of the injection amplifier 11. The gas flows along the annular airway 32 and flows out from the injection slit 33. Because the spacing of the injection slit 33 is small, the gas flow rate here increases and the pressure decreases. The external gas is affected by the atmospheric pressure and flows into the center of the injection amplifier 11, generating an air injection effect, so that the cooling air volume acting on the heat sink 16 can reach dozens of times the air volume of the intake fan 10. The air injection effect is used to achieve the effect of amplified cooling. After being cooled by the heat sink 16 and the injection amplifier 11, the water vapor is re-condensed into liquid and then flows into the primary cooling space at the bottom of the reaction box 23, forming a circulating cooling effect.

[0044] After the pyrolysis gas is initially cooled down and reaches the retention tube 25, the air compressor 17 pushes the liquid refrigerant inside into the evaporator through the lower water distribution pipe of the double pipe 18. The liquid refrigerant absorbs the heat dissipated by the retention tube 25, evaporates into gas, and then enters the heat sink 16. The temperature of the pyrolysis gas inside the retention tube 25 is further reduced. When the internal temperature detected by the temperature sensor 27 is not within the control range, the lower expansion valve 20 will automatically adjust the flow rate of the refrigerant, so that the temperature of the space where the retention tube 25 is located is automatically adjusted to an appropriate range; the gaseous refrigerant enters the heat sink 16, and with the assistance of the condensing fan 21, it is re-condensed and liquefied, releasing a large amount of heat, and then enters the air compressor 17 again, forming a circulating refrigeration effect.

[0045] The pyrolysis gas after cooling overflows from the retention tube 25, enters the anti-filling tube 26 from the vent hole 37, and then flows out from the exhaust hole 34 of the anti-filling tube 26. At this time, the temperature of the pyrolysis gas has been reduced to within the reaction range of 15-25 degrees, and the vacuum pump 7 also adjusts the pressure in the space where the anti-filling tube 26 is located to within the range of 1700Pa-3200Pa. At this pressure and ambient temperature, water will evaporate, increasing the humidity in the space, and the low-temperature reaction enzyme will quickly react with the gas to obtain hydrogen at this temperature and humidity; as the reaction process accelerates, the temperature and humidity in the space will gradually change. The upper expansion valve 19 has the same operating principle as the lower expansion valve 20. After the temperature sensor 28 detects the temperature change, the upper expansion valve 19 will automatically adjust the flow rate of the refrigerant in the current space, so that the temperature in the reaction space is within the required range, and after the humidity sensor 29 detects the humidity change, it will control the vacuum pump 7 to adjust the pressure in the space, thereby adjusting the evaporation rate of water, so as to control the humidity within a reasonable range.

[0046] After the reaction is completed, the space above the first plate 35 is filled with hydrogen and other impurity gases, the on-off valve 8 above the reaction box 23 is opened, and the mixed gas flows into the separator 3 from the on-off valve 8, and pure hydrogen is obtained after separation.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

[0049] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A biomass low-temperature hydrogen production device, characterized in that: It comprises a gasification chamber (1), a reaction center (2) and a separator (3), wherein the feed inlet of the reaction center (2) is connected to the discharge port of the gasification chamber (1), and the feed inlet of the separator (3) is connected to the discharge port of the reaction center (2); The reaction center (2) comprises a hydrogen production unit (4), a temperature and humidity control unit (5), a waste heat recovery unit (6) and a vacuum pump (7); the hydrogen production unit (4) is connected to the discharge port of the gasification chamber (1); the temperature and humidity control unit (5) is arranged on the outer wall of the hydrogen production unit (4); the waste heat recovery unit (6) is arranged on a side of the hydrogen production unit (4) away from the gasification chamber (1); the vacuum pump (7) is arranged on the upper part of the side wall of the hydrogen production unit (4); and an on-off valve (8) is arranged at the upper end of the hydrogen production unit (4); The waste heat recovery unit (6) comprises a support rod (9), an air intake fan (10), an ejection amplifier (11), a steam pipe (12), a pressure valve (13), a steam fan (14), a conveyor belt (15) and a heat sink (16), wherein the support rod (9) is arranged on a side wall of the hydrogen production unit (4) away from the vaporization chamber (1), the air intake fan (10) is rotatably arranged at the center of the support rod (9), the ejection amplifier (11) is arranged on the air intake fan (10), the steam pipe (12) is arranged at the bottom of the side wall of the hydrogen production unit (4) near the support rod (9), and the steam pipe (1 2) is connected to the bottom end of the interior of the hydrogen production unit (4), the pressurizing valve (13) is arranged on the steam pipe (12), the steam fan (14) is rotatably arranged on the side wall of the pressurizing valve (13), the conveyor belt (15) is connected between the steam fan (14) and the air intake fan (10), the air intake of the heat sink (16) is arranged on the side wall of the steam fan (14), the steam fan (14) can rotate relative to the air intake of the heat sink (16), and the air outlet of the heat sink (16) is connected to the bottom of the side wall of the hydrogen production unit (4) close to the vaporization chamber (1) through a pipeline; The hydrogen production unit (4) comprises a reaction box (23), a primary condenser (24), a retention pipe (25) and an anti-flooding pipe (26), wherein the reaction box (23) is connected to the vaporization chamber (1), the primary condenser (24) is arranged at the bottom of the reaction box (23), the retention pipe (25) is arranged in the middle of the reaction box (23), the retention pipe (25) is connected to the primary condenser (24), and the anti-flooding pipe (26) is arranged at the upper end of the reaction box (23); The reaction box (23) is provided with a first layer plate (35), a second layer plate (36) is provided on the first layer plate (35), an array of ventilation holes (37) is provided on the second layer plate (36), and the ventilation holes (37) are communicated with the bottom of the anti-irrigation tube (26); The topmost and bottommost spaces of the hydrogen production unit (4) are filled with water, and the topmost space of the hydrogen production unit (4) is also filled with a reaction enzyme.

2. A biomass low-temperature hydrogen production equipment according to claim 1, characterized in that: The anti-flooding tube (26) is in an inverted U shape, and an array of exhaust holes (34) are provided at the bottom end of the anti-flooding tube (26).

3. A biomass low-temperature hydrogen production equipment according to claim 2, characterized in that: A temperature sensor 1 (27) is provided through the area where the side wall of the reaction box (23) and the retention tube (25) are adapted, and a temperature sensor 2 (28) and a humidity sensor (29) are provided through the area where the side wall of the reaction box (23) and the anti-irrigation tube (26) are adapted, respectively.

4. A biomass low-temperature hydrogen production equipment according to claim 3, characterized in that: The temperature and humidity control unit (5) comprises an air compressor (17), a dual-connected pipe (18), an upper expansion valve (19), a lower expansion valve (20), a condensing fan (21) and a condenser (22); the air compressor (17) is arranged on the side wall of the reaction box (23); the dual-connected pipe (18) is arranged on the air compressor (17); the upper water distribution pipe of the dual-connected pipe (18) is connected to the area where the anti-flooding pipe (26) is located in the reaction box (23); and the dual-connected pipe (18) is connected to the upper water distribution pipe of the reaction box (23). The lower water distribution pipe of the double-tube (18) is connected to the area where the retention pipe (25) is located in the reaction box (23), the upper expansion valve (19) is arranged in the upper water distribution pipe of the double-tube (18), the lower expansion valve (20) is arranged in the lower water distribution pipe of the double-tube (18), the condenser (22) is connected between the reaction box (23) and the air compressor (17) through a pipeline, and the condensing fan (21) is arranged on the inner side of the condenser (22) close to the reaction box (23).

5. A biomass low-temperature hydrogen production equipment according to claim 4, characterized in that: The steam fan (14) is provided with inner fan blades (30).

6. A biomass low-temperature hydrogen production device according to claim 5, characterized in that: The side wall of the ejection amplifier (11) is provided with a housing shell (31), the air intake fan (10) is arranged in the housing shell (31), an annular air passage (32) is arranged around the inner cavity of the ejection amplifier (11), and an ejection slit (33) is arranged on the inner side of the annular air passage (32).

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