Biomass pyrolysis waste heat utilization composite preparation reforming hydrogen production equipment and method

Abstract

The invention discloses biomass pyrolysis waste heat utilization composite preparation reforming hydrogen production equipment and method.The biomass pyrolysis waste heat utilization composite preparation reforming hydrogen production equipment comprises a pyrolysis carbonization furnace and a reforming hydrogen production furnace which are connected up and down, a pyrolysis reaction chamber is arranged in the pyrolysis carbonization furnace, and a reforming reaction chamber is arranged in the reforming hydrogen production furnace; a pyrolysis heating cavity is formed between the outer wall of the pyrolysis reaction chamber and the inner wall of the pyrolysis carbonization furnace, a reforming heating cavity is formed between the outer wall of the reforming reaction chamber and the inner wall of the reforming hydrogen production furnace, and a heating resistance wire is arranged on the inner wall of the reforming hydrogen production furnace. According to the invention, a plurality of devices are not needed to transfer the catalyst, the operation steps are simplified, the experimental error in the transfer process is reduced, a heat source is provided by a single-section electric heating mode, and the energy consumption is reduced; and waste heat recycling can be achieved, the heat energy use efficiency is improved, and the pyrolysis hydrogen production efficiency is higher.

Description

Technical Field

[0001] The invention relates to a composite preparation and reforming hydrogen production equipment and method using waste heat from biomass pyrolysis, belonging to the technical field of biomass pyrolysis and reforming hydrogen production. Background Art

[0002] Hydrogen energy has attracted much attention as an efficient and clean energy carrier. Traditional hydrogen production methods such as fossil fuel reforming hydrogen production face problems such as limited resources and environmental pollution, while biomass hydrogen production has significant advantages such as being renewable and carbon neutral, and has become a research hotspot in the field of hydrogen production. As a major agricultural country, my country is rich in biomass resources, which provide sufficient raw materials for pyrolysis reforming hydrogen production. Biomass includes crop straw, firewood, and forestry residues. Every year, about hundreds of millions of tons of biomass are discarded or incinerated on site, which not only pollutes the environment but also causes a waste of resources. Therefore, the utilization of biomass resources has been continuously promoted.

[0003] The recovery and utilization of waste heat from biomass pyrolysis can effectively improve the resource utilization of biomass hydrogen production, improve energy conversion efficiency, economic efficiency and reduce environmental pollution. The pyrolysis catalyst plays a key role in the process of biomass pyrolysis reforming hydrogen production. It can promote the pyrolysis reaction and improve the output and quality of hydrogen. However, in the prior art, the efficiency of biomass waste heat recovery still needs to be improved, the integration of the waste heat utilization system and the hydrogen production equipment is not ideal, and the cost of the waste heat utilization system is relatively high. The preparation of the catalyst and the biomass pyrolysis process often lack effective composite integration, resulting in a complex process of catalytic preparation and pyrolysis hydrogen production, and the hydrogen production efficiency cannot be fully utilized. In addition, the experimental errors from catalyst preparation to biomass pyrolysis process are large and the process is complex.

[0004] The Chinese invention patent with announcement number CN117946705A discloses a biomass pyrolysis reforming hydrogen production system and method, including a pyrolysis carbonization furnace device for pyrolyzing raw materials, a reforming hydrogen production furnace device for reforming raw materials, a secondary combustion chamber device for transporting and burning and heating pyrolysis gas, and a water tank; an air heat exchange box cools down the high-temperature gas; the above patent can achieve self-heating of the biomass pyrolysis reforming hydrogen production system, improves energy utilization efficiency, but its system operation efficiency is low, and it still needs an electric heating system to start. Although there is a waste heat utilization system, the waste heat efficiency is low, the waste heat utilization is insufficient, and the catalyst preparation is separated from the pyrolysis process, the process flow is complicated, and the hydrogen production efficiency is low.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0006] In view of the deficiencies in the background technology, the present invention provides a composite preparation and reforming hydrogen production equipment and method for utilizing the waste heat of biomass pyrolysis. There is no need to use multiple devices to transfer the catalyst, which simplifies the operation steps and reduces the experimental errors in the transfer process. The heat source is provided by a single-stage electric heating method, which reduces energy consumption. The composite preparation of pyrolysis catalyst can realize the recovery and utilization of waste heat, improves the efficiency of thermal energy utilization, and makes the pyrolysis hydrogen production more efficient.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: A biomass pyrolysis waste heat utilization composite preparation reforming hydrogen production equipment, comprising a pyrolysis carbonization furnace and a reforming hydrogen production furnace connected up and down, wherein a pyrolysis reaction chamber is provided inside the pyrolysis carbonization furnace, and a reforming reaction chamber is provided inside the reforming hydrogen production furnace; A pyrolysis heating chamber is formed between the outer wall of the pyrolysis reaction chamber and the inner wall of the pyrolysis carbonization furnace, a reforming heating chamber is formed between the outer wall of the reforming reaction chamber and the inner wall of the reforming hydrogen production furnace, and a heating resistance wire is arranged on the inner wall of the reforming hydrogen production furnace.

[0008] Furthermore, the top of the reforming heating chamber is connected to the recovery pump air inlet of the waste heat recovery box through the heating gas exhaust port, and the recovery pump exhaust port of the waste heat recovery box is connected to the pyrolysis heating air inlet at the top of the pyrolysis heating chamber.

[0009] Furthermore, the bottom of the reforming heating chamber is connected to the blower through the blower air inlet.

[0010] Furthermore, a water pipe is provided in the waste heat recovery box, one end of the water pipe is connected to the water pump, and the other end is connected to the composite air inlet at the top of the reforming reaction chamber, and the composite air inlet is located at the lower end of the isolation valve.

[0011] Furthermore, the pyrolysis reaction chamber and the reforming reaction chamber are arranged to be interconnected from top to bottom, and an isolation valve is provided at the junction between the two. A biomass placement plate is placed in the pyrolysis reaction chamber, and the biomass is placed on the biomass placement plate for pyrolysis reaction. A catalyst placement plate is placed in the reforming reaction chamber, and the biomass raw material for preparing the catalyst is placed on the catalyst placement plate to prepare the catalyst.

[0012] Furthermore, it also includes a first gas cylinder and a second gas cylinder containing inert gas, the first gas cylinder transports the inert gas into the pyrolysis reaction chamber through a feeder; the second gas cylinder is connected to the composite gas inlet through a pipeline to transport the inert gas into the reforming reaction chamber.

[0013] Furthermore, the smoke filter, the pyrolysis gas exhaust port and the smoke filter are connected through a connecting pipe and a switch is provided on the connecting pipe; the pyrolysis gas exhaust port at the lower end of the reforming reaction chamber is connected to the condensing device; A waste gas exhaust pipe is arranged in the pyrolysis heating chamber, the lower end of the waste gas exhaust pipe extends into the bottom of the pyrolysis heating chamber, the waste gas exhaust pipe is connected to the smoke filter through a connecting pipe and a switch is arranged on the connecting pipe.

[0014] Furthermore, a plurality of annular gas baffles are arranged at intervals from top to bottom on the outer wall of the pyrolysis reaction chamber and the inner wall of the pyrolysis carbonization furnace.

[0015] A method for producing hydrogen by composite reforming of biomass pyrolysis waste heat, the method comprising the following steps: Step S1, placing the raw materials for preparing the catalyst into the reforming reaction chamber, tightening the furnace body sealing cover and the pyrolysis reaction chamber sealing cover, and completing the sealing and preparation work; Step S2, close the isolation valve, open the second gas cylinder, and allow the inert gas to enter the reforming reaction chamber through the composite gas inlet; after the exhaust is completed, control the heating resistance wire in the reforming heating chamber to heat through the heating temperature control panel; Step S3, closing the second gas cylinder, de-energizing the heating resistor, starting the blower, and discharging the high-temperature waste heat gas into the waste heat recovery box 19 through the heating gas exhaust port 10; Step S4, after the waste heat gas is exhausted, the isolation valve is opened, the blower is turned off, the first gas cylinder is opened, and the inert gas enters the pyrolysis reaction chamber through the feeder and the feed inlet, and the air in the pyrolysis reaction chamber and the reforming reaction chamber is exhausted; Step S5, after the exhaust is completed, the heating temperature control panel is turned on, a predetermined temperature is set, the waste heat recovery pump in the waste heat recovery box is turned on, and the high-temperature gas in the waste heat recovery box is discharged into the pyrolysis heating chamber for preheating. After reaching the predetermined temperature, the biomass raw material is added through the feeder 22, the switch 24 of the pipeline from the pyrolysis gas exhaust port 17 to the smoke filter 23 is closed, and the pipeline leading to the condensing device 28 is connected; Step S6, start the water pump to allow the water vapor in the water pipe to enter the reforming reaction chamber from the composite air inlet. In the reforming reaction chamber, the water vapor, the catalyst and the pyrolysis gas produced by pyrolysis in the pyrolysis reaction chamber react together to generate a synthesis gas with a high hydrogen content. The synthesis gas is collected as a mixed gas with a high hydrogen content under the filtering action of the condensing device 28.

[0016] Furthermore, in step S5, the blower is started to continuously send the high-temperature gas in the reforming heating chamber into the waste heat recovery box, and then into the pyrolysis heating chamber from the waste heat recovery box to heat the pyrolysis reaction chamber.

[0017] After adopting the above technical solution, the present invention has the following advantages compared with the prior art: 1) The integrated structure of the pyrolysis carbonization furnace and the reforming hydrogen production furnace can combine the catalyst preparation with the biomass pyrolysis reforming hydrogen production process. There is no need to transfer the catalyst between multiple devices, which simplifies the operation steps and reduces the error in the transfer process. The heat source is provided by a single-stage electric heating method, which reduces energy consumption.

[0018] 2) During the catalyst preparation process, the high-temperature gas in the reforming heating chamber is collected in the waste heat recovery box, and the high-temperature gas is used for pyrolysis and water vapor heat exchange vaporization, and finally the waste heat gas is returned to the reforming heating chamber to complete hydrogen production.

[0019] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0021] In the figure, 1-pyrolysis carbonization furnace, 2-sealing cover, 201-pyrolysis heating air inlet, 202-pressure sensor connection port, 203-feeding port, 204-temperature sensor connection port, 205-waste gas exhaust port, 3-pyrolysis reaction chamber sealing cover, 4-pyrolysis heating chamber, 5-pyrolysis reaction chamber, 6-biomass placement plate, 7-gas baffle plate, 8-insulation partition, 9-composite air inlet, 10-heating gas exhaust port, 11-reforming hydrogen production furnace, 12-reforming heating chamber, 13-reforming reaction chamber, 1 4- heating temperature control panel, 15- catalyst placement plate, 16- heating resistance wire, 17- pyrolysis gas exhaust port, 18- air blower inlet, 19- waste heat recovery box, 191- recovery pump exhaust port, 192- water pipe, 193- recovery pump inlet, 20- waste heat recovery pump, 21- water pump, 22- feeder, 23- smoke filter, 24- switch, 25- isolation valve, 26- second gas cylinder, 27- blower, 28- condensing device, 29- first gas cylinder, 30- sealing buckle. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0023] like Figure 1-2 As shown, the present invention provides a composite reforming hydrogen production equipment for utilizing waste heat from biomass pyrolysis, comprising a pyrolysis carbonization furnace 1 and a reforming hydrogen production furnace 11 connected up and down, the pyrolysis carbonization furnace 1 and the reforming hydrogen production furnace 11 are both cylindrical in shape formed by buckling two semicircular arc furnace bodies, one side of the two semicircular arc furnace bodies are hinged to each other, and the other side is locked to each other by a sealing buckle 30.

[0024] The pyrolysis carbonization furnace 1 is provided with a pyrolysis reaction chamber 5, and the reforming hydrogen production furnace 11 is provided with a reforming reaction chamber 13; A pyrolysis heating chamber 4 is formed between the outer wall of the pyrolysis reaction chamber 5 and the inner wall of the pyrolysis carbonization furnace 1, a reforming heating chamber 12 is formed between the outer wall of the reforming reaction chamber 13 and the inner wall of the reforming hydrogen production furnace 11, a heating resistance wire 16 is provided on the inner wall of the reforming hydrogen production furnace 11, and a heating temperature control panel 14 is provided on the outer side of the reforming hydrogen production furnace 11.

[0025] The bottom of the reforming heating chamber 12 is connected to the blower 27 through the blower air inlet 18, the top of the reforming heating chamber 12 is connected to the recovery pump air inlet 193 of the waste heat recovery box 19 through the heating gas exhaust port 10, and the recovery pump exhaust port 191 of the waste heat recovery box 19 is connected to the pyrolysis heating air inlet 201 at the top of the pyrolysis heating chamber 4.

[0026] A plurality of annular gas baffles 7 are arranged at intervals from top to bottom on the outer wall of the pyrolysis reaction chamber 5 and the inner wall of the pyrolysis carbonization furnace 1 .

[0027] The pyrolysis reaction chamber 5 and the reforming reaction chamber 13 are mutually connected in an upper and lower manner, and an isolation valve 25 is provided at the junction between the two. A biomass placement plate 6 is placed in the pyrolysis reaction chamber 5, and the biomass is placed on the biomass placement plate 6 for pyrolysis reaction. A catalyst placement plate 15 is placed in the reforming reaction chamber 13, and the biomass raw material for preparing the catalyst is placed on the catalyst placement plate 15 to prepare the catalyst. A furnace body sealing cover 2 is provided at the upper end of the pyrolysis carbonization furnace 1.

[0028] A water pipe 192 is provided in the waste heat recovery box 19 , one end of the water pipe 192 is connected to the water pump 21 , and the other end is connected to the composite air inlet 9 at the top of the reforming reaction chamber 13 , and the composite air inlet 9 is located at the lower end of the isolation valve 25 .

[0029] The present invention also includes a first gas cylinder 29 and a second gas cylinder 26 containing inert gas. The first gas cylinder 29 transports the inert gas into the pyrolysis carbonization furnace 1 through the feeder 22, and the feeder 22 adds biomass into the pyrolysis carbonization furnace 1; the second gas cylinder 26 is connected to the composite air inlet 9 through a pipeline.

[0030] The present invention also includes a condensing device 28 and a smoke filter 23. The pyrolysis gas exhaust port 17 at the lower end of the reforming reaction chamber 13 is connected to the condensing device 28. The pyrolysis gas exhaust port 17 is connected to the smoke filter 23 through a connecting pipe and a switch 24 is provided on the connecting pipe. A waste gas exhaust pipe 205 is provided in the pyrolysis heating chamber 4. The lower end of the waste gas exhaust pipe 205 extends to the bottom of the pyrolysis heating chamber 4, so that the waste heat gas entering from the pyrolysis heating air inlet 201 can fully heat the pyrolysis reaction chamber 5 and then flow out from the air inlet at the lower end of the waste gas exhaust pipe 205.

[0031] The exhaust gas exhaust pipe 205 is connected to the smoke filter 23 through a connecting pipe and a switch 24 is provided on the connecting pipe.

[0032] A pyrolysis reaction chamber sealing cover 3 is provided at the upper end of the pyrolysis reaction chamber 5, and a pressure sensor connection port 202 and a temperature sensor connection port 204 are provided on the pyrolysis reaction chamber sealing cover 3. A pressure sensor and a temperature sensor are installed on the pressure sensor connection port 202 and the temperature sensor connection port 204 respectively. A feed port 203 is also provided on the pyrolysis reaction chamber sealing cover 3, and the feed port 203 is connected to the feeder 22.

[0033] The integrated structure of the pyrolysis carbonization furnace 1 and the reforming hydrogen production furnace 11 can combine the catalyst preparation with the biomass pyrolysis reforming hydrogen production process, without the need to transfer the catalyst between multiple devices, thus simplifying the operation steps and reducing errors in the transfer process. The heat source is provided by a single-stage electric heating method, which reduces energy consumption.

[0034] After the catalyst preparation is completed, the high-temperature gas in the reforming heating chamber 12 is collected in the waste heat recovery box 19, and the high-temperature gas is used for pyrolysis and water vapor heat exchange vaporization, and finally the waste heat gas flows to the pyrolysis heating chamber 4 to complete pyrolysis hydrogen production.

[0035] The present invention also provides a method for producing hydrogen by pyrolysis and reforming of biomass using the device, comprising the following steps: Step S1, put the raw materials for preparing the catalyst into the reforming reaction chamber 13, and tighten the furnace body sealing cover 2 and the pyrolysis reaction chamber sealing cover 3, and do a good job of sealing and preparation. Place the biomass raw materials for preparing the catalyst into the feeder 22, and connect the blower 27 and the waste heat recovery box 19.

[0036] Step S2, close the isolation valve 25, open the second gas cylinder 26, allow the inert gas to enter the reforming reaction chamber 13 through the composite air inlet 9, and discharge the air in the reforming reaction chamber 13 from the smoke filter 23 through the pyrolysis gas exhaust port 17; after the gas is exhausted, control the heating resistance wire 16 in the reforming heating chamber 12 to heat through the heating temperature control panel 14, so as to heat the biomass raw material used to prepare the catalyst in the reforming reaction chamber 13 to prepare the catalyst.

[0037] In step 2, the gas discharged from the pyrolysis gas exhaust port 17 of the reforming reaction chamber 13 enters the smoke filter 23. The discharged gas contains inert gas and mixed gas generated during the catalyst preparation process, and is discharged after the filtered gas meets the emission standards.

[0038] Step S3, after the catalyst preparation is completed, the second gas cylinder 26 is closed, the heating resistor 16 is powered off, and the blower 27 is started. The blower 27 drives the high-temperature gas in the reforming heating chamber 12 from the heating gas exhaust port 10 into the waste heat recovery box 19 for waste heat recovery.

[0039] Step S4, after the waste heat recovery is completed and the reforming reaction chamber 13 is cooled down, the isolation valve 25 is opened, the blower 27 is closed, the first gas cylinder 29 is opened, and the inert gas enters the pyrolysis reaction chamber 5 through the feeder 22 and the feed port 203, and the air in the pyrolysis reaction chamber 5 and the reforming reaction chamber 13 is discharged.

[0040] Step S5, after the air is exhausted, the heating temperature control panel 14 is opened, the predetermined temperature is set, the waste heat recovery pump 20 in the waste heat recovery box 19 is turned on, and the high-temperature gas in the waste heat recovery box 19 enters the pyrolysis heating chamber 4 for preheating, and is blocked by the gas baffle 7, so that the heat in the pyrolysis heating chamber 4 is fully transferred to the pyrolysis reaction chamber 5, and the pyrolysis reaction chamber 5 is preheated. During the preheating process, the speed of the waste heat recovery pump 20 and the flow rate of the water pump 21 are controlled by observing the temperature sensor, so as to achieve the effect of controlling the temperature of the pyrolysis reaction chamber 5. After the temperature reaches the preheating temperature, the discharge port of the feeder 22 is opened, so that the biomass is put into the biomass placement plate 6 of the pyrolysis reaction chamber 5 through the feed port 203 for pyrolysis, and at the same time, the switch 24 of the pipeline from the pyrolysis gas exhaust port 17 to the smoke filter 23 is closed, and the pipeline leading to the condensing device 28 is connected.

[0041] In step S5 , the blower 27 is started to continuously send the high-temperature gas in the reforming heating chamber 12 into the waste heat recovery box 19 , and then into the pyrolysis heating chamber 4 from the waste heat recovery box 19 to heat the pyrolysis reaction chamber 5 .

[0042] Step S6, start the water pump 21, so that the water vapor in the water pipe 192 enters the reforming reaction chamber 13 from the composite air inlet 9, and in the reforming reaction chamber 13, the water vapor, the catalyst and the pyrolysis gas generated by pyrolysis in the pyrolysis reaction chamber 5 react together to generate a synthesis gas with a high hydrogen content. Under the action of the condensing device 28, the syngas filters out impurities such as tar and acid gas in the synthesis gas, and collects the mixed gas with a high hydrogen content. The waste gas reused in the pyrolysis heating chamber 4 enters the smoke filter 23 from the waste gas exhaust pipe 205, and is discharged after the filtered gas meets the emission standards.

[0043] The pyrolysis equipment can collect and utilize the waste heat generated during the catalyst preparation process, store the waste heat high-temperature gas and vaporize it through heat exchange with water vapor, and use the waste heat to supply heat for biomass pyrolysis reforming and hydrogen production operations.

[0044] The above is an example of the best implementation of the present invention, and the parts not described in detail are common knowledge of ordinary technicians in the field. The protection scope of the present invention shall be based on the content of the claims, and any equivalent transformation based on the technical enlightenment of the present invention is also within the protection scope of the present invention.

Claims

1. A biomass pyrolysis waste heat utilization composite preparation reforming hydrogen production equipment, characterized in that: It comprises a pyrolysis carbonization furnace (1) and a reforming hydrogen production furnace (11) connected up and down, wherein a pyrolysis reaction chamber (5) is provided inside the pyrolysis carbonization furnace (1), and a reforming reaction chamber (13) is provided inside the reforming hydrogen production furnace (11); A pyrolysis heating chamber (4) is formed between the outer wall of the pyrolysis reaction chamber (5) and the inner wall of the pyrolysis carbonization furnace (1), a reforming heating chamber (12) is formed between the outer wall of the reforming reaction chamber (13) and the inner wall of the reforming hydrogen production furnace (11), and a heating resistance wire (16) is provided on the inner wall of the reforming hydrogen production furnace (11).

2. The biomass pyrolysis waste heat utilization composite reforming hydrogen production equipment according to claim 1, characterized in that: The top of the reforming heating chamber (12) is connected to the recovery pump air inlet (193) of the waste heat recovery box (19) through the heating gas exhaust port (10), and the recovery pump exhaust port (191) of the waste heat recovery box (19) is connected to the pyrolysis heating air inlet (201) at the top of the pyrolysis heating chamber (4).

3. A biomass pyrolysis waste heat utilization composite reforming hydrogen production equipment as claimed in claim 2, characterized in that: The bottom of the reforming heating chamber (12) is connected to a blower (27) via a blower air inlet (18).

4. The biomass pyrolysis waste heat utilization composite reforming hydrogen production equipment as claimed in claim 2, characterized in that: A water pipe (192) is provided in the waste heat recovery box (19), one end of the water pipe (192) is connected to the water pump (21), and the other end is connected to the composite air inlet (9) at the top of the reforming reaction chamber (13), and the composite air inlet (9) is located at the lower end of the isolation valve (25).

5. The biomass pyrolysis waste heat utilization composite reforming hydrogen production equipment as claimed in claim 1, characterized in that: The pyrolysis reaction chamber (5) and the reforming reaction chamber (13) are arranged to be interlinked with each other from top to bottom, and an isolation valve (25) is provided at the junction between the two. A biomass placement plate (6) is placed in the pyrolysis reaction chamber (5), and biomass is placed on the biomass placement plate (6) for pyrolysis reaction. A catalyst placement plate (15) is placed in the reforming reaction chamber (13), and biomass raw materials for preparing catalysts are placed on the catalyst placement plate (15) to prepare catalysts.

6. The biomass pyrolysis waste heat utilization composite reforming hydrogen production equipment as claimed in claim 1, characterized in that: It also includes a first gas cylinder (29) and a second gas cylinder (26) containing inert gas. The first gas cylinder (29) delivers the inert gas to the pyrolysis reaction chamber (5) through the feeder (22); the second gas cylinder (26) is connected to the composite gas inlet (9) through a pipeline and delivers the inert gas to the reforming reaction chamber (13).

7. The biomass pyrolysis waste heat utilization composite reforming hydrogen production equipment as claimed in claim 1, characterized in that: The filter (23), the pyrolysis gas exhaust port (17) at the lower end of the reforming reaction chamber (13) is connected to the condensing device (28), the pyrolysis gas exhaust port (17) is connected to the smoke filter (23) through a connecting pipe and a switch (24) is provided on the connecting pipe; A waste gas exhaust pipe (205) is provided in the pyrolysis heating chamber (4), the lower end of the waste gas exhaust pipe (205) extends into the bottom of the pyrolysis heating chamber (4), the waste gas exhaust pipe (205) is connected to the smoke filter (23) through a connecting pipe, and a switch (24) is provided on the connecting pipe.

8. The biomass pyrolysis waste heat utilization composite reforming hydrogen production equipment as claimed in claim 1, characterized in that: A plurality of annular gas baffles (7) are arranged at intervals from top to bottom on the outer wall of the pyrolysis reaction chamber (5) and the inner wall of the pyrolysis carbonization furnace (1).

9. A method for producing hydrogen by utilizing the waste heat from biomass pyrolysis and reforming, characterized in that: The method is applied to the biomass pyrolysis waste heat composite preparation reforming hydrogen production equipment according to any one of claims 1 to 8, and the method comprises the following steps: Step S1, placing the raw materials for preparing the catalyst into the reforming reaction chamber (13), tightening the furnace body sealing cover (2) and the pyrolysis reaction chamber sealing cover (3), and completing the sealing and preparation work; Step S2, closing the isolation valve (25), opening the second gas cylinder (26), allowing the inert gas to enter the reforming reaction chamber (13) through the composite gas inlet (9); after the exhaust is completed, controlling the heating resistance wire (16) in the reforming heating chamber (12) to heat through the heating temperature control panel (14); Step S3, closing the second gas cylinder (26), de-energizing the heating resistor (16), and starting the blower (27); Step S4, opening the isolation valve (25), closing the blower (27), opening the first gas cylinder (29), allowing the inert gas to enter the pyrolysis reaction chamber (5) through the feeder (22) and the feed port (203), and exhausting the air in the pyrolysis reaction chamber (5) and the reforming reaction chamber (13) from the smoke filter (23); Step S5, open the heating temperature control panel (14), set a predetermined temperature, turn on the waste heat recovery pump (20) in the waste heat recovery box (19), allow the high-temperature gas in the waste heat recovery box (19) to enter the pyrolysis heating chamber (4) for preheating, and after reaching the predetermined temperature, add the biomass raw material through the feeder (22), close the switch (24) of the pipeline from the pyrolysis gas exhaust port (17) to the smoke filter (23), and connect the pipeline to the condensing device (28); Step S6, starting the water pump (21) to allow the water vapor in the water pipe (192) to enter the reforming reaction chamber (13) from the composite air inlet (9). In the reforming reaction chamber (13), the water vapor, the catalyst and the pyrolysis gas generated by the pyrolysis of the biomass in the pyrolysis reaction chamber (5) react together to generate a synthesis gas with a high hydrogen content. The synthesis gas is filtered by the condensing device (28) to collect a mixed gas with a high hydrogen content.

10. A method for producing hydrogen by composite reforming using waste heat from biomass pyrolysis as claimed in claim 8, characterized in that: In step S(5), the blower (27) is started to continuously send the high-temperature gas in the reforming heating chamber (12) into the waste heat recovery box (19), and then enter the pyrolysis heating chamber (4) from the waste heat recovery box (19) to heat the pyrolysis reaction chamber (5).

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