Biomass photo-thermal pyrolysis device utilizing solar energy

Abstract

The invention relates to a waste biomass utilization and solar energy utilization technology, and aims to provide a biomass photo-thermal pyrolysis device utilizing solar energy. The device comprises a storage container and a reaction container which are nested, and the tops of the storage container and the reaction container are connected to form a sealing structure with a feeding hole and a quartz glass window; an inner cavity of the reaction container is used as a pyrolytic reaction chamber, a cavity between the two containers is used as a pyrolytic oil storage chamber, and the two chambers are connected through a pyrolytic oil gas circulation pipeline; a pyrolysis gas discharge pipeline and a pyrolysis oil discharge pipeline are arranged on the storage container; a pyrolytic carbon discharge pipeline penetrating through the storage container downwards is arranged at the bottom of the reaction container, and a valve is arranged on each pipeline. The reaction container is not only a pyrolysis reactor, but also an internal heat accumulator of the whole device, and can effectively accumulate heat energy and utilize the heat energy to bake the biomass which is not completely reacted. The waste heat of the pyrolysis gas is utilized to heat the pyrolysis oil, so that the heat tracing consumption is reduced; the device is simple, wide in application range and high in practicability.

Description

Technical Field

[0001] The invention belongs to the technical field of waste biomass utilization and solar energy utilization, and specifically relates to a biomass photothermal pyrolysis device utilizing solar energy. Background Art

[0002] With the development of economy and society, the massive consumption of fossil fuels worldwide has caused problems such as air pollution and global warming. Carbon dioxide emission control has become an important mission in all fields of the national economy, among which the utilization of biomass is an important path to reduce carbon dioxide emissions in the energy field. Biomass materials that can be utilized as resources mainly include plants that directly use photosynthesis to synthesize organic matter, such as crop straw, rice husks, corn cobs, waste wood and urban garbage; they also include organic matter formed by indirect use of photosynthesis products, such as livestock and poultry manure, crab shells, shrimp skins and shells, as well as photoautotrophic prokaryotic algae. However, the traditional decentralized incineration utilization method will cause environmental pollution. If the centralized transportation method is adopted, it is subject to multiple restrictions such as transportation radius and transportation cost. The decentralized clean pyrolysis utilization method has become a better choice in a specific area with its unique flexibility, low cost and ease of operation.

[0003] During the pyrolysis process, pyrolysis requires additional energy input to make the reactants reach a certain temperature. The sensible heat of the generated high-temperature pyrolysis gas will be lost during the cooling and discharge process, resulting in the heat not being effectively utilized and low energy utilization. The current pyrolysis process generally burns the pyrolysis gas and uses the generated high-temperature flue gas to heat the pyrolysis furnace, which can partially utilize this sensible heat, but this method requires the design of a more complex system, which needs to include a combustion chamber, economizer, air preheater, dust collector, desulfurization and denitrification equipment, etc. This not only increases the complexity of the system, but also increases the difficulty of maintenance, and the pyrolysis gas supplied outside the system still has the problem of sensible heat waste.

[0004] Therefore, based on the above technical status, the present invention proposes a solar energy waste biomass pyrolysis technology, which aims to realize the resource, clean and efficient utilization of solar energy and biomass energy, and use the waste heat of pyrolysis gas to heat bio-oil, saving the resources consumed by the heating system of pyrolysis oil, and effectively utilizing the waste heat of pyrolysis gas to avoid energy waste. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a biomass photothermal pyrolysis device utilizing solar energy.

[0006] To solve the technical problem, the solution of the present invention is:

[0007] A biomass pyrolysis device utilizing solar energy is proposed. The device comprises a storage container and a reaction container with a hollow interior, wherein the reaction container is nested inside the storage container; the tops of the two containers are connected to form a sealed structure, and a feed port and a transparent quartz glass window are provided at the sealed structure; the inner cavity of the reaction container is used as a pyrolysis reaction chamber, and the cavity between the two containers is used as a pyrolysis oil storage chamber; temperature and pressure sensors are provided inside the two chambers, and are connected to a controller through signal lines;

[0008] One end of the pyrolysis oil and gas circulation pipeline is connected to the upper part of the reaction container, and the other end extends into the pyrolysis oil storage chamber and is located at the bottom, and an exhaust hole is provided at the end of the pipeline; a pyrolysis gas discharge pipeline connected to the pyrolysis oil storage chamber is provided at the upper part of the storage container, and a pyrolysis oil discharge pipeline is provided at the bottom of the storage container; a pyrolysis carbon discharge pipeline is provided at the bottom of the reaction container, and the pipeline runs downward through the bottom of the storage container; valves are respectively provided on each pipeline, and the valves are located outside the storage container or the reaction container.

[0009] As a preferred embodiment of the present invention, a pyrolysis oil and gas discharge valve is provided on the pyrolysis oil and gas circulation pipeline; the valve is an electrically controlled valve and is connected to the controller through a signal line; the valve provided on the pyrolysis gas discharge pipeline is a self-operated pressure control valve, or the valve is an electrically controlled valve and is connected to the controller through a signal line; the valves provided on the pyrolysis carbon discharge pipeline and the pyrolysis oil discharge pipeline are manual valves, or both valves are electrically controlled valves and are connected to the controller through a signal line.

[0010] As a preferred embodiment of the present invention, the reaction container and the storage container are both hollow spheres, or both hollow cylinders.

[0011] As a preferred embodiment of the present invention, the tops of the reaction container and the storage container are welded to form an integrated sealing structure.

[0012] As a preferred solution of the present invention, a support is provided at the bottom of the inner wall of the storage container, and the bottom of the reaction container is seated on the top of the support; a supporting base is provided at the bottom of the outer wall of the storage container.

[0013] As a preferred embodiment of the present invention, the outer walls of the reaction container, storage container and pyrolysis oil and gas circulation pipeline are all provided with insulation layers; an additional layer of PTFE coating is provided outside the insulation layer of the outer wall of the reaction container.

[0014] As a preferred embodiment of the present invention, the last section of the pyrolysis oil gas circulation pipeline at the bottom of the pyrolysis oil storage chamber is arranged horizontally, and several gas distributors are equidistantly arranged on the pipeline there, each gas distributor having several exhaust holes.

[0015] The present invention further provides a method for photothermal pyrolysis of biomass using solar energy using the above-mentioned device, the method comprising the following operations:

[0016] (1) The pretreated biomass particles are fed into a pyrolysis reaction chamber, and concentrated sunlight is introduced through a transparent quartz glass window to heat the biomass and promote pyrolysis reaction;

[0017] (2) As the pyrolysis reaction proceeds, the pressure in the pyrolysis reaction chamber gradually increases to a set value, and the valve on the pyrolysis oil and gas circulation pipeline is opened to allow the pyrolysis oil and gas mixture to enter the pyrolysis oil storage chamber through the pipeline; due to the temperature difference between the inner and outer chambers of the reaction vessel, and the temperature of the pyrolysis oil storage chamber is lower than the boiling point of the pyrolysis oil, the condensable gas in the pyrolysis oil and gas is condensed into liquid oil and stored at the bottom of the chamber; the non-condensable gas stays above the liquid surface; as the oil and gas mixture is gradually introduced into the pyrolysis oil storage chamber, its internal pressure will reach the set value; at this time, the valve on the pyrolysis gas discharge pipeline at the upper part of the chamber is opened to discharge the non-condensable gas from the chamber and flow into the external gas cabinet for storage;

[0018] (3) If it is monitored that the temperature of the pyrolysis oil in the pyrolysis oil storage chamber is lower than the set temperature, the valve on the pyrolysis oil gas circulation pipeline is opened; the high-temperature pyrolysis oil gas in the pyrolysis reaction chamber is introduced into the pyrolysis oil storage chamber, and the pyrolysis oil is heated after being released from below the liquid surface to maintain its fluidity.

[0019] As a preferred embodiment of the present invention, the volume of biomass particles added before each reaction does not exceed two-thirds of the volume of the reaction container.

[0020] As a preferred embodiment of the present invention, during the pyrolysis reaction, the pressure of the pyrolysis reaction chamber is controlled to be 0.4-0.5 MPa; the pressure of the pyrolysis oil storage chamber is controlled to be 0.2-0.3 MPa, and the temperature of the pyrolysis oil is 100-130°C.

[0021] Description of the invention principle:

[0022] The biomass photothermal pyrolysis device provided by the present invention mainly includes a storage container and a reaction container, the latter is embedded in the former, the top of the two are constructed as a sealing structure that overlaps each other, and a feed port and a quartz window are provided on the top. The periphery of the storage container, the reaction container and the pyrolysis oil and gas circulation pipeline are all wrapped with a high-efficiency insulation layer. The pyrolysis oil and gas circulation pipeline is used to collect a mixture of pyrolysis oil and pyrolysis gas, the pyrolysis char discharge pipeline is used to discharge the biochar in the reaction container, the pyrolysis oil discharge pipeline is used to discharge the pyrolysis oil separated in the storage container, and the pyrolysis gas discharge pipeline is used to discharge the pyrolysis gas separated in the storage container.

[0023] During the reaction process, the temperature and pressure sensors are used to monitor the internal temperature and pressure of the reaction vessel. When the pressure exceeds the set value, the internal cavity pressure is controlled by properly discharging the pyrolysis oil and gas. The discharged mixed oil and gas are guided to the pyrolysis oil storage chamber for heat exchange and separation. As an important control condition, the pressure of the pyrolysis reaction chamber is designed to be always higher than the pressure of the pyrolysis oil storage chamber. This pressure difference design is conducive to the effective and safe release of the oil and gas in the pyrolysis reaction chamber.

[0024] When the pressure of the pyrolysis oil storage chamber does not reach the preset value, the temporarily collected pyrolysis oil and gas will be safely stored in the closed space and gradually achieve gas-liquid separation. If the pressure of the chamber exceeds the set value, the discharge valve on the pyrolysis gas discharge pipeline is opened to safely release it to the external gas cabinet to maintain the pressure within a controllable range.

[0025] In addition, since the outer periphery of the reaction container is wrapped with a layer of thermal insulation material, the container actually acts as a heat storage body, which can effectively maintain and accumulate thermal energy. During the reaction process, if the temperature of the pyrolysis oil in the pyrolysis oil storage chamber is monitored to be low (such as less than 100°C), the control valve on the pyrolysis oil gas circulation pipeline can be opened. At this time, the high-temperature pyrolysis oil and gas in the reaction container will be released and guided below the liquid level of the pyrolysis oil; then heat exchange will be carried out when passing through the pyrolysis oil, thereby heating the pyrolysis oil to maintain its fluidity, so that it can be discharged at any time for external use. The outside of the storage container of the present invention is also wrapped with an efficient thermal insulation material layer, which is used to insulate the temporarily stored pyrolysis oil to improve the thermal efficiency of the entire system.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention can be used for the photothermal decomposition reaction of biomass, and can convert pollution-free solar energy into fuels such as biochar, oil, and gas for storage, thereby realizing the coordinated resource utilization, clean and efficient utilization of solar energy and biomass, thereby overall solving the problems of large cyclic fluctuations in solar energy, large pollution caused by the dispersed utilization of biomass, and the limitation of transportation radius for concentrated utilization.

[0028] 2. The reaction vessel in the present invention is not only a pyrolysis reactor, but also an internal heat storage body of the entire device, which can effectively accumulate thermal energy and use this heat to bake the incompletely reacted biomass.

[0029] 3. In the present invention, the oil and gas discharged from the pyrolysis reaction chamber are introduced below the liquid level of the pyrolysis oil, and the gas-liquid separation can be achieved while being cooled by the liquid. The waste heat of the pyrolysis gas is used to heat the pyrolysis oil, saving the resources consumed by the heating system for the pyrolysis oil in the traditional technology. Therefore, this design can make full use of heat energy and avoid waste.

[0030] 4. The heat required for the photothermal pyrolysis reaction in the present invention comes entirely from solar energy, and the pyrolysis products produced by pyrolyzing biomass can all be converted into three products: charcoal, gas, and oil, which is green, environmentally friendly, and pollution-free.

[0031] 5. The products obtained by the pyrolysis reaction of the present invention can be discharged externally in different qualities, and can be stored and utilized in different categories. Therefore, the device can be used for energy storage and multi-energy complementation, and can be used for self-production and self-use in remote areas such as rural areas, towns, and villa areas; among them, gas and fuel oil can be used for cooking, heating houses, etc., and biochar can be returned to the fields as organic fertilizer;

[0032] 6. The device of the present invention is simple, flexible and convenient to operate, has a wide range of applications, high energy utilization rate, strong practicality, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of a biomass photothermal pyrolysis device utilizing solar energy in the present invention.

[0034] Figure 2 It is a graph showing the relationship between the pressure in the pyrolysis reaction chamber and the pyrolysis gas emissions.

[0035] Reference numerals in the figure: 1 quartz glass window; 2 feed inlet; 3 pyrolysis gas exhaust valve; 4 pyrolysis gas exhaust pipe; 5 pyrolysis reaction chamber; 6 insulation layer; 7 pyrolysis oil exhaust valve; 8 pyrolysis oil exhaust pipe; 9 pyrolysis char exhaust pipe; 10 pyrolysis char exhaust valve; 11 pyrolysis oil storage chamber; 12 insulation layer; 13 pyrolysis oil and gas circulation pipe; 14 pyrolysis oil and gas exhaust valve. DETAILED DESCRIPTION

[0036] In order to make the technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and cannot be used to limit the scope of the present invention to be protected.

[0037] Part I. Structural Description of the Device

[0038] like Figure 1 As shown, the biomass pyrolysis device using solar energy includes a storage container and a reaction container with a hollow interior, and the reaction container is nested inside the storage container. The reaction container and the storage container can be hollow spheres at the same time, or hollow cylinders at the same time. An insulation layer is provided on the outer walls of the reaction container, the storage container, and the pyrolysis oil and gas circulation pipeline; an additional layer of PTFE coating is provided outside the insulation layer of the outer wall of the reaction container. As an example, the insulation layer can be made of ceramic fiber material, and the PTFE coating is evenly covered on the ceramic fiber material, which can achieve double-layer insulation performance and maintain the characteristic of not being stained by liquid oil.

[0039] In order to achieve stable support, a support member is provided at the bottom of the inner wall of the storage container, and the bottom of the reaction container is seated on the top of the support member; at the same time, a supporting base is provided at the bottom of the outer wall of the storage container.

[0040] The tops of the storage container and the reaction container are connected by welding to form an integrated sealing structure, and a feed port 2 and a transparent quartz glass window 1 are provided at the sealing structure. The inner cavity of the reaction container is used as a pyrolysis reaction chamber 5, and the cavity between the two containers is used as a pyrolysis oil storage chamber 11; temperature and pressure sensors are provided inside the two chambers and are connected to a controller through signal lines.

[0041] The device includes a pyrolysis oil and gas circulation pipeline 13 with an outer wall provided with an insulation layer, one end of which is connected to the upper part of the reaction container, and the other end extends into the pyrolysis oil storage chamber 11 and is located at the bottom, and an exhaust hole is provided at the end of the pipeline. As a preferred embodiment, the end section of the pipeline is horizontally arranged and several gas distributors are equidistantly arranged, and each gas distributor has a number of exhaust holes. A pyrolysis gas discharge pipeline 4 connected to the pyrolysis oil storage chamber 11 is provided at the upper part of the storage container, and a pyrolysis oil discharge pipeline 8 is provided at the bottom of the storage container; a pyrolysis carbon discharge pipeline 9 is provided at the bottom of the reaction container, and the pipeline runs downward through the bottom of the storage container.

[0042] Valves are provided on each pipeline, and the valves are located outside the storage container or the reaction container, which is convenient for operation, disassembly and maintenance. As shown in the figure, a pyrolysis oil and gas discharge valve 14 is provided on the pyrolysis oil and gas circulation pipeline 13; the valve is an electrically controlled valve and is connected to the controller through a signal line. The pyrolysis gas discharge valve 3 provided on the pyrolysis gas discharge pipeline 4 is a self-acting pressure control valve, or the valve is an electrically controlled valve and is connected to the controller through a signal line. The pyrolysis carbon discharge valve 10 provided on the pyrolysis carbon discharge pipeline 9 and the pyrolysis oil discharge valve 7 provided on the pyrolysis oil discharge pipeline 8 are manual valves, or both valves are electrically controlled valves and are connected to the controller through a signal line.

[0043] Part 2 Instructions for use of the device

[0044] The above-mentioned device is used to realize the method of photothermal pyrolysis of biomass using solar energy, which includes the following operations:

[0045] (1) The pretreated biomass particles are fed into the pyrolysis reaction chamber 5 from the feed port 1. The volume of the biomass particles fed before each reaction does not exceed two-thirds of the volume of the reaction vessel. The feeding process can be observed through the quartz glass window. After the feeding is completed, concentrated sunlight can be introduced from the transparent quartz glass window 1 to heat the biomass and promote its pyrolysis reaction;

[0046] (2) As the pyrolysis reaction proceeds, the pressure in the pyrolysis reaction chamber 5 gradually increases to a set value, and the valve on the pyrolysis oil and gas circulation pipeline 13 is opened to allow the pyrolysis oil and gas mixture to enter the pyrolysis oil storage chamber 11 through the pipeline; due to the temperature difference between the inner and outer chambers of the reaction vessel, and the temperature of the pyrolysis oil storage chamber 11 is lower than the boiling point of the pyrolysis oil, the condensable gas in the pyrolysis oil and gas condenses into liquid oil and is stored at the bottom of the chamber, while the non-condensable gas stays above the liquid surface; as the oil and gas mixture is gradually introduced into the pyrolysis oil storage chamber 11, its internal pressure will reach a set value; at this time, the valve on the pyrolysis gas exhaust pipeline 4 at the upper part of the chamber is opened, so that the non-condensable gas is discharged from the chamber and enters the external gas cabinet for storage.

[0047] As an example, during the pyrolysis reaction, the pressure of the pyrolysis reaction chamber is controlled to be 0.4-0.5 MPa; the pressure of the pyrolysis oil storage chamber is controlled to be 0.2-0.3 MPa, and the temperature of the pyrolysis oil is 100-130°C.

[0048] (3) If it is monitored that the temperature of the pyrolysis oil in the pyrolysis oil storage chamber 11 is lower than the set temperature, the valve on the pyrolysis oil gas circulation pipeline 13 is opened; at this time, the high-temperature pyrolysis oil and gas in the pyrolysis reaction chamber 5 will be introduced into the pyrolysis oil storage chamber 11, and after being released from below the liquid surface, the pyrolysis oil will be heated to maintain its fluidity, so that the pyrolysis oil can be exported to the outside at any time as needed.

[0049] (4) When the demand for pyrolysis products is greater than the output, biomass pellets will continue to be added to the pyrolysis reaction chamber 5 so that the thermochemical reaction can continue in the chamber. As the raw materials are added and the thermochemical reaction proceeds, the oil and gas in the chamber are filled to a preset pressure value, at which time the oil and gas will be discharged through the pipeline. Figure 2 The figure shows the pressure variation curve during the pyrolysis reaction process, which reflects the real-time change of the chamber pressure in the pyrolysis furnace and the dynamic pressure control mechanism related to the collection and discharge of pyrolysis gas.

[0050] When the pressure of the pyrolysis oil storage chamber 11 does not reach the set value, the pyrolysis gas will be temporarily stored in the chamber. If the pressure reaches the set value, it will be discharged to the gas cabinet for storage for subsequent use.

[0051] The above description is only a preferred embodiment of the present invention, and does not limit the scope of the patent. It should be pointed out that for ordinary technicians in this technical field, all equivalent structural changes made under the concept of the present invention using the contents of the present invention specification and drawings, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A biomass photothermal pyrolysis device utilizing solar energy, characterized in that: The device comprises a storage container and a reaction container with a hollow interior, and the reaction container is nested inside the storage container; the tops of the two containers are connected to form a sealing structure, and a feed port and a transparent quartz glass window are provided at the sealing structure; the inner cavity of the reaction container is used as a pyrolysis reaction chamber, and the cavity between the two containers is used as a pyrolysis oil storage chamber; temperature and pressure sensors are provided inside the two chambers, and are connected to a controller through signal lines; One end of the pyrolysis oil and gas circulation pipeline is connected to the upper part of the reaction container, and the other end extends into the pyrolysis oil storage chamber and is located at the bottom, and an exhaust hole is provided at the end of the pipeline; a pyrolysis gas discharge pipeline connected to the pyrolysis oil storage chamber is provided at the upper part of the storage container, and a pyrolysis oil discharge pipeline is provided at the bottom of the storage container; a pyrolysis carbon discharge pipeline is provided at the bottom of the reaction container, and the pipeline runs downward through the bottom of the storage container; valves are respectively provided on each pipeline, and the valves are located outside the storage container or the reaction container.

2. The biomass photothermal pyrolysis device according to claim 1, characterized in that: A pyrolysis oil and gas discharge valve is provided on the pyrolysis oil and gas circulation pipeline; the valve is an electrically controlled valve and is connected to the controller through a signal line; the valve provided on the pyrolysis gas discharge pipeline is a self-operated pressure control valve, or the valve is an electrically controlled valve and is connected to the controller through a signal line; the valves provided on the pyrolysis carbon discharge pipeline and the pyrolysis oil discharge pipeline are manual valves, or both valves are electrically controlled valves and are connected to the controller through a signal line.

3. The biomass photothermal pyrolysis device according to claim 1, characterized in that: The reaction container and the storage container are both hollow spheres, or both hollow cylinders.

4. The biomass photothermal pyrolysis device according to claim 1, characterized in that: The tops of the reaction container and the storage container are welded to form an integrated sealing structure.

5. The biomass photothermal pyrolysis device according to claim 1, characterized in that: A support is provided at the bottom of the inner wall of the storage container, and the bottom of the reaction container is seated on the top of the support; a supporting base is provided at the bottom of the outer wall of the storage container.

6. The biomass photothermal pyrolysis device according to claim 1, characterized in that: The outer walls of the reaction container, storage container and pyrolysis oil and gas circulation pipeline are all provided with insulation layers; an additional layer of PTFE coating is provided outside the insulation layer of the outer wall of the reaction container.

7. The biomass photothermal pyrolysis device according to claim 1, characterized in that: The last section of the pyrolysis oil gas flow pipeline at the bottom of the pyrolysis oil storage chamber is arranged horizontally, and a plurality of gas distributors are arranged equidistantly on the pipeline there, and each gas distributor has a plurality of exhaust holes.

8. A method for photothermal pyrolysis of biomass using solar energy using the device described in any one of claims 1 to 7, characterized in that: The method includes the following operations: (1) The pretreated biomass particles are fed into a pyrolysis reaction chamber, and concentrated sunlight is introduced through a transparent quartz glass window to heat the biomass and promote pyrolysis reaction; (2) As the pyrolysis reaction proceeds, the pressure in the pyrolysis reaction chamber gradually increases to a set value, and the valve on the pyrolysis oil and gas circulation pipeline is opened to allow the pyrolysis oil and gas mixture to enter the pyrolysis oil storage chamber through the pipeline; due to the temperature difference between the inner and outer chambers of the reaction vessel, and the temperature of the pyrolysis oil storage chamber is lower than the boiling point of the pyrolysis oil, the condensable gas in the pyrolysis oil and gas is condensed into liquid oil and stored at the bottom of the chamber; the non-condensable gas stays above the liquid surface; as the oil and gas mixture is gradually introduced into the pyrolysis oil storage chamber, its internal pressure will reach the set value; at this time, the valve on the pyrolysis gas discharge pipeline at the upper part of the chamber is opened to discharge the non-condensable gas from the chamber and flow into the external gas cabinet for storage; (3) If it is monitored that the temperature of the pyrolysis oil in the pyrolysis oil storage chamber is lower than the set temperature, the valve on the pyrolysis oil gas circulation pipeline is opened; the high-temperature pyrolysis oil gas in the pyrolysis reaction chamber is introduced into the pyrolysis oil storage chamber, and the pyrolysis oil is heated after being released from below the liquid surface to maintain its fluidity.

9. The method according to claim 8, characterized in that The volume of biomass particles added before each reaction shall not exceed two-thirds of the volume of the reaction container.

10. The method according to claim 8, characterized in that During the pyrolysis reaction, the pressure of the pyrolysis reaction chamber is controlled to be 0.4-0.5Mpa; the pressure of the pyrolysis oil storage chamber is controlled to be 0.2-0.3Mpa, and the temperature of the pyrolysis oil is 100-130°C.

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