Biomass pyrolysis waste heat utilization composite preparation reforming hydrogen production equipment

Abstract

The utility model discloses biomass pyrolysis waste heat utilization composite preparation reforming hydrogen production equipment which 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 utility model, 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 utility model relates to a kind of biomass pyrolysis waste heat utilization composite preparation reform hydrogen production equipment, belong to biomass pyrolysis reform hydrogen production technical field. BACKGROUND

[0002] Hydrogen energy, as a kind of efficient and clean energy carrier, has attracted much attention. Traditional hydrogen production methods, such as fossil fuel reforming, face problems such as limited resources and environmental pollution. Biomass hydrogen production, with its advantages of being renewable and carbon neutral, has become a research hotspot in the field of hydrogen production. China, as an agricultural country, has abundant biomass resources, providing sufficient raw materials for pyrolysis reform hydrogen production. Biomass includes crop straw, firewood and forestry residues, etc. Each year, about 700 million tons of biomass are wasted or burned on site, polluting the environment and wasting resources. Therefore, the utilization of biomass resources has been continuously promoted.

[0003] Biomass pyrolysis waste heat recovery can effectively improve the resource utilization of biomass hydrogen production, improve energy conversion efficiency and economic efficiency, and reduce environmental pollution. The pyrolysis catalyst plays a key role in the process of biomass pyrolysis reform hydrogen production, as it can promote the pyrolysis reaction, improve the yield and quality of hydrogen. However, in existing technology, the biomass waste heat recovery efficiency still needs to be improved, the integration of waste heat utilization system and hydrogen production equipment is not ideal, and the cost of waste heat utilization system is relatively high. The preparation of catalyst and biomass pyrolysis process often lack effective integration, resulting in complex catalytic preparation and pyrolysis hydrogen production process, and the hydrogen production efficiency is not fully utilized. From catalyst preparation to biomass pyrolysis process, the experimental error is large and the process is complex.

[0004] The Chinese utility model patent with publication number CN117946705A discloses a biomass pyrolysis reform hydrogen production system and method, which includes a pyrolysis carbonization furnace device for pyrolyzing raw materials, a reforming hydrogen production furnace device for reforming raw materials, a two-burner device for transporting and burning heat to pyrolysis gas, and a water tank. The air heat exchanger box cools the high-temperature gas. The above-mentioned patent can realize self-heating of the biomass pyrolysis reform hydrogen production system, and improve the energy utilization efficiency. However, the system has low operating efficiency and 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 not sufficient, and the catalyst preparation and pyrolysis process are separated, the process is complex, and the hydrogen production efficiency is low.

[0005] In summary, the existing technology has obvious inconvenience and defects in actual use, so it needs to be improved. UTILITY MODEL CONTENTS

[0006] The utility model discloses to the deficiency in the prior art, provide a kind of biomass pyrolysis waste heat utilization composite preparation reform hydrogen production equipment, without using multiple equipment to transfer catalyst, simplify the operation step and reduce the experimental error in transfer process, rely on single section electric heating type mode to provide heat source, reduce the consumption of energy;Composite preparation pyrolysis catalyst and can realize waste heat recycling, improve the efficiency of thermal energy use, make pyrolysis hydrogen production efficiency higher.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] A kind of biomass pyrolysis waste heat utilization composite preparation reform hydrogen production equipment, including the pyrolysis carbonization furnace and reform hydrogen production furnace connected in upper and lower, the pyrolysis carbonization furnace is internally provided with pyrolysis reaction chamber, and reform hydrogen production furnace is provided with reform reaction chamber;

[0009] The outer wall of the pyrolysis reaction chamber and the inner wall of the pyrolysis carbonization furnace form a pyrolysis heating cavity, and the outer wall of the reform reaction chamber and the inner wall of the reform hydrogen production furnace form a reform heating cavity, and the inner wall of the reform hydrogen production furnace is provided with a heating resistance wire.

[0010] Further, the top of the reform heating cavity is connected to the recovery pump gas inlet of the waste heat recovery tank through a heating gas exhaust port, and the recovery pump exhaust port of the waste heat recovery tank is connected to the pyrolysis heating gas inlet at the top of the pyrolysis heating cavity.

[0011] Further, the bottom of the reform heating cavity is connected to the air blower through an air blower gas inlet.

[0012] Further, a water pipe is provided in the waste heat recovery tank, one end of the water pipe is connected to a water pump, and the other end is connected to a composite gas inlet at the top of the reform reaction chamber, and the composite gas inlet is located below the isolation valve.

[0013] Further, the pyrolysis reaction chamber and the reform reaction chamber are arranged in an upper and lower interpenetrating manner, and an isolation valve is provided at the interface between the two, a biomass placement plate is placed in the pyrolysis reaction chamber, and biomass is placed on the biomass placement plate for pyrolysis reaction, and a catalyst placement plate is placed in the reform reaction chamber to place biomass raw materials for preparing catalyst on the catalyst placement plate to prepare catalyst.

[0014] Further, it further includes a first gas cylinder and a second gas cylinder filled with inert gas, the first gas cylinder delivers inert gas into the pyrolysis reaction chamber through a feeder, and the second gas cylinder is connected to the composite gas inlet through a pipeline to deliver inert gas into the reform reaction chamber.

[0015] Further, a smoke filter is provided, the pyrolysis gas exhaust port is connected to the smoke filter through a connecting pipeline, and a switch is provided on the connecting pipeline; the pyrolysis gas exhaust port at the lower end of the reform reaction chamber is connected to a condensing device.

[0016] The pyrolysis heating cavity is provided with a waste gas exhaust pipe, the lower end of the waste gas exhaust pipe extends into the bottom of the pyrolysis heating cavity, the waste gas exhaust pipe is connected with the smoke filter through a connecting pipeline, and a switch is arranged on the connecting pipeline.

[0017] Further, the outer wall of the pyrolysis reaction chamber and the inner wall of the pyrolysis carbonization furnace are spaced apart from top to bottom and are provided with a plurality of annular gas flow blocking plates.

[0018] Compared with the prior art, the above technical scheme has the following advantages:

[0019] 1) The pyrolysis carbonization furnace and the reforming hydrogen production furnace integrated structure can compound catalyst preparation and biomass pyrolysis reforming hydrogen production process, without transferring the catalyst between multiple devices, simplifying the operation steps and reducing the error in the transfer process, relying on a single electric heating type to provide heat source, reducing energy consumption.

[0020] 2) In the catalyst preparation process, the high-temperature gas in the reforming heating cavity is collected in the waste heat recovery tank, the high-temperature gas is used for pyrolysis and water vapor heat exchange vaporization, and finally the waste heat gas flow is returned to the reforming heating cavity to complete hydrogen production.

[0021] The utility model will be described in detail below in combination with the drawings and examples. DRAWINGS

[0022] Fig. 1 is the structure schematic diagram of the utility model;

[0023] Fig. 2 is the structure schematic diagram of the utility model inside.

[0024] In the drawings,

[0025] 1-pyrolysis carbonization furnace, 2-sealing cover, 201-pyrolysis heating gas 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 cavity, 5-pyrolysis reaction chamber, 6-biomass placing plate, 7-gas flow blocking plate, 8-heat preservation partition, 9-composite gas inlet, 10-heating gas exhaust port, 11-reforming hydrogen production furnace, 12-reforming heating cavity, 13-reforming reaction chamber, 14-heating temperature control panel, 15-catalyst placing plate, 16-heating resistance wire, 17-pyrolysis gas exhaust port, 18-blast inlet, 19-waste heat recovery tank, 191-recovery pump exhaust port, 192-water pipe, 193-recovery pump gas 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

[0026] In order to have a clearer understanding of the technical features, objects and effects of the present application, the specific embodiments of the present application will be described with reference to the drawings.

[0027] As shown in Figs. 1-2 The present application provides a kind of biomass pyrolysis waste heat utilization composite preparation reform hydrogen production equipment, including the pyrolysis carbonization furnace 1 and reform hydrogen production furnace 11 connected in upper and lower, pyrolysis carbonization furnace 1 and reform hydrogen production furnace 11 are all through the arc-shaped furnace body of two semicircles buckling and form cylindrical, one side of the arc-shaped furnace body of two semicircles is mutually hinged, and the other side is mutually locked by sealing snap 30.

[0028] The pyrolysis carbonization furnace 1 is internally provided with pyrolysis reaction chamber 5, and the reform hydrogen production furnace 11 is internally provided with reform reaction chamber 13.

[0029] The outer wall of the pyrolysis reaction chamber 5 and the inner wall of the pyrolysis carbonization furnace 1 form a pyrolysis heating cavity 4, the outer wall of the reform reaction chamber 13 and the inner wall of the reform hydrogen production furnace 11 form a reform heating cavity 12, the inner wall of the reform hydrogen production furnace 11 is provided with heating resistance wire 16, and the outer side of the reform hydrogen production furnace 11 is provided with heating temperature control panel 14.

[0030] The bottom of the reform heating cavity 12 is connected with the air blower 27 through the air inlet 18 of the air blower, the top of the reform heating cavity 12 is connected with the recovery pump air inlet 193 of the waste heat recovery tank 19 through the heating gas exhaust port 10, and the recovery pump exhaust port 191 of the waste heat recovery tank 19 is connected with the pyrolysis heating air inlet 201 at the top of the pyrolysis heating cavity 4.

[0031] The outer wall of the pyrolysis reaction chamber 5 and the inner wall of the pyrolysis carbonization furnace 1 are arranged in multiple annular gas flow plates 7 from top to bottom.

[0032] The pyrolysis reaction chamber 5 and the reform reaction chamber 13 are arranged in an upper and lower interpenetrating manner, and a partition valve 25 is arranged at the junction between the two, the pyrolysis reaction chamber 5 is placed with a biomass placing plate 6, the biomass is placed on the biomass placing plate 6 for pyrolysis reaction, the reform reaction chamber 13 is placed with a catalyst placing plate 15, the biomass raw material for preparing catalyst is placed on the catalyst placing plate 15 to prepare catalyst, and the upper end of the pyrolysis carbonization furnace 1 is provided with a furnace body sealing cover 2.

[0033] The waste heat recovery tank 19 is provided with a water pipe 192, one end of the water pipe 192 is connected with a water pump 21, the other end is connected with a composite air inlet 9 at the top of the reform reaction chamber 13, and the composite air inlet 9 is located at the lower end of the partition valve 25.

[0034] The utility model also includes first gas cylinder 29 and second gas cylinder 26 that inert gas is contained in, first gas cylinder 29 is transported inert gas to pyrolysis carbonization furnace 1 through feeder 22, and feeder 22 adds biomass to pyrolysis carbonization furnace 1, second gas cylinder 26 is linked with composite air inlet 9 through pipeline.

[0035] The utility model also includes condensing device 28 and smoke filter 23, and the pyrolysis gas exhaust 17 of reforming reaction chamber 13 lower extreme is linked with condensing device 28, and the pyrolysis gas exhaust 17 is linked with smoke filter 23 through connecting pipeline and is equipped with switch 24 on connecting pipeline, the waste gas exhaust pipe 205 of being equipped with in pyrolysis heating cavity 4, the lower extreme of waste gas exhaust pipe 205 stretches to the bottom of pyrolysis heating cavity 4, and the residual heat gas that enters from pyrolysis heating air inlet 201 is heated to pyrolysis reaction chamber 5 after being heated fully and flows from the air inlet of waste gas exhaust pipe 205 lower extreme.

[0036] The waste gas exhaust pipe 205 is linked with smoke filter 23 through connecting pipeline and is equipped with switch 24 on connecting pipeline.

[0037] The upper end of pyrolysis reaction chamber 5 is equipped with pyrolysis reaction chamber sealing cover 3, and the pyrolysis reaction chamber sealing cover 3 is equipped with pressure sensor connection 202 and temperature sensor connection 204, and the pressure sensor connection 202 and temperature sensor connection 204 are respectively installed with pressure sensor and temperature sensor, and the pyrolysis reaction chamber sealing cover 3 is also equipped with feed inlet 203, and the feed inlet 203 is linked with feeder 22.

[0038] The integrated structure of pyrolysis carbonization furnace 1 and reforming hydrogen production furnace 11 can composite preparation of catalyst preparation and biomass pyrolysis reforming hydrogen production process, and the catalyst does not need to be transferred between multiple equipment, which simplifies the operation steps and reduces the error in the transfer process, relies on single-stage electric heating type to provide heat source, and reduces the energy consumption.

[0039] After the preparation of catalyst is finished, the high-temperature gas in the reforming heating cavity 12 is collected in the waste heat recovery tank 19, and the high-temperature gas is used for pyrolysis and water vapor heat exchange vaporization, so that the residual heat gas flows to the pyrolysis heating cavity 4 to complete the pyrolysis hydrogen production.

[0040] The utility model also provides a kind of method for using the equipment to pyrolysis reforming hydrogen of biomass, comprising the following steps:

[0041] Step S1, the raw material for preparing catalyst is placed in reforming reaction chamber 13, and furnace body sealing cover 2 and pyrolysis reaction chamber sealing cover 3 are screwed, and sealing and preparation work are well done. The biomass raw material for preparing catalyst is placed in feeder 22, and air blower 27 and waste heat recovery tank 19 are connected.

[0042] Step S2, close the isolation valve 25, open the second gas cylinder 26, so that the inert gas enters the reforming reaction chamber 13 through the composite gas inlet 9, and the air in the reforming reaction chamber 13 is discharged from the pyrolysis gas exhaust port 17 to the smoke filter 23; after the gas is exhausted, the heating resistance wire 16 in the reforming heating cavity 12 is controlled by the heating temperature control panel 14 to heat, so as to heat the biomass raw material for preparing the catalyst in the reforming reaction chamber 13 to prepare the catalyst.

[0043] In step 2, the gas discharged from the reforming reaction chamber 13 pyrolysis gas exhaust port 17 enters the smoke filter 23, and the discharged gas contains inert gas and mixed gas generated in the process of preparing the catalyst. After the filtered gas meets the emission standard, it is discharged.

[0044] Step S3, after the preparation of the catalyst is completed, the second gas cylinder 26 is closed, the heating resistance wire 16 is powered off, and the air blower 27 is started. The air blower 27 sends the high-temperature gas in the reforming heating cavity 12 from the heating gas exhaust port 10 into the waste heat recovery tank 19 for waste heat recovery.

[0045] Step S4, after the waste heat recovery is completed and the reforming reaction chamber 13 is cooled, the isolation valve 25 is opened, the air blower 27 is closed, and the first gas cylinder 29 is opened. 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.

[0046] 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 tank 19 is opened, the high-temperature gas in the waste heat recovery tank 19 enters the pyrolysis heating cavity 4 for preheating, and the gas flow resistance plate 7 is blocked, so that the heat in the pyrolysis heating cavity 4 is fully transferred to the pyrolysis reaction chamber 5 to preheat the pyrolysis reaction chamber 5. During the preheating process, the speed of the waste heat recovery pump 20 and the flow of the water pump 21 are controlled by observing the temperature sensor, so as to control the temperature of the pyrolysis reaction chamber 5. After the temperature reaches the preheating temperature, the discharge port of the feeder 22 is opened, the biomass is put into the biomass placing plate 6 of the pyrolysis reaction chamber 5 through the feed port 203 for pyrolysis, at the same time, the switch 24 between the pyrolysis gas exhaust port 17 and the smoke filter 23 is closed, and the pipeline to the condensing device 28 is connected.

[0047] In step S5, the air blower 27 is started, the high-temperature gas in the reforming heating cavity 12 is continuously sent into the waste heat recovery tank 19, and from the waste heat recovery tank 19 into the pyrolysis heating cavity 4 to heat the pyrolysis reaction chamber 5.

[0048] Step S6, start the water pump 21, make the water vapor in the water pipe 192 from the composite air inlet 9 into the reforming reaction chamber 13, in the reforming reaction chamber 13, water vapor, catalyst and pyrolysis gas generated in the pyrolysis reaction chamber 5 are reacted together to generate synthesis gas with high hydrogen content. Under the action of the condensing device 28, the tar and acid gas impurities in the synthesis gas are filtered, and the mixed gas with high hydrogen content is collected. The waste gas in the pyrolysis heating cavity 4 is introduced into the smoke filter 23 from the waste gas exhaust pipe 205, and the filtered gas is discharged after meeting the emission standard.

[0049] The pyrolysis equipment can collect and utilize the waste heat generated in the catalyst preparation process, store and water vapor heat vaporization the waste heat high temperature gas, and use the waste heat to supply heat for the biomass pyrolysis reforming hydrogen production operation.

[0050] The above is an example of the best embodiment of the present application, wherein the parts not described in detail are the common knowledge of those skilled in the art. The protection scope of the present application is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present application is also within the protection scope of the present application.

Claims

1. A biomass pyrolysis waste heat utilization composite preparation reforming hydrogen production equipment, characterized in that: The pyrolysis carbonization furnace (1) and the hydrogen reforming furnace (11) are connected up and down, the pyrolysis carbonization furnace (1) is internally provided with a pyrolysis reaction chamber (5), and the hydrogen reforming furnace (11) is internally provided with a reforming reaction chamber (13); The outer wall of the pyrolysis reaction chamber (5) and the inner wall of the pyrolysis carbonization furnace (1) form a pyrolysis heating cavity (4), the outer wall of the reforming reaction chamber (13) and the inner wall of the hydrogen reforming furnace (11) form a reforming heating cavity (12), and the inner wall of the hydrogen reforming furnace (11) is provided with a heating resistance wire (16).

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

3. The biomass pyrolysis waste heat utilization composite reforming hydrogen production equipment according to claim 2, characterized in that: The bottom of the reforming heating cavity (12) is connected with a blower (27) through a blower gas inlet (18).

4. The biomass pyrolysis waste heat utilization composite preparation reforming hydrogen production equipment according to claim 2, characterized in that: The waste heat recovery tank (19) is internally provided with a water pipe (192), one end of the water pipe (192) is connected with a water pump (21), the other end is connected with a composite gas inlet (9) at the top of the reforming reaction chamber (13), and the composite gas inlet (9) is located at the lower end of an isolation valve (25).

5. The biomass pyrolysis waste heat utilization composite preparation reforming hydrogen production equipment according to claim 1, characterized in that: The pyrolysis reaction chamber (5) and the reforming reaction chamber (13) are arranged in a penetrating manner from top to bottom, and the junction between the two is provided with an isolation valve (25), the pyrolysis reaction chamber (5) is provided with a biomass placing plate (6), biomass is placed on the biomass placing plate (6) to perform pyrolysis reaction, and the reforming reaction chamber (13) is provided with a catalyst placing plate (15), and biomass raw materials for preparing catalyst are placed on the catalyst placing plate (15) to prepare catalyst.

6. The biomass pyrolysis waste heat utilization composite reforming hydrogen production equipment according to claim 1, characterized in that: The first gas cylinder (29) and the second gas cylinder (26) are also included, the first gas cylinder (29) is connected with the pyrolysis reaction chamber (5) through a feeder (22) to deliver inert gas into the pyrolysis reaction chamber (5), and the second gas cylinder (26) is connected with the composite gas inlet (9) through a pipeline to deliver inert gas into the reforming reaction chamber (13).

7. The biomass pyrolysis waste heat utilization composite reforming hydrogen production equipment according to claim 1, wherein the smoke is used as fuel gas. A filter (23) is arranged, the pyrolysis gas exhaust port (17) at the lower end of the reforming reaction chamber (13) is connected with a condensing device (28), and the pyrolysis gas exhaust port (17) is connected with the smoke filter (23) through a connecting pipeline and is provided with a switch (24) on the connecting pipeline. ​ The pyrolysis heating cavity (4) is internally provided with a waste gas exhaust pipe (205), the lower end of the waste gas exhaust pipe (205) extends into the bottom of the pyrolysis heating cavity (4), and the waste gas exhaust pipe (205) is connected with the smoke filter (23) through a connecting pipeline and is provided with a switch (24) on the connecting pipeline.

8. The biomass pyrolysis waste heat utilization composite reforming hydrogen production equipment according to claim 1, characterized in that: The outer wall of the pyrolysis reaction chamber (5) and the inner wall of the pyrolysis carbonization furnace (1) are arranged with a plurality of annular gas baffles (7) in a spaced-apart manner from top to bottom.

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