Biomass Gas Thermal Carbonization System and Application

Abstract

This application provides a biomass gas thermal carbonization system and its application, belonging to the field of carbonization systems. The biomass gas thermal carbonization system comprises a pulverizing unit, a drying and preheating unit, a carbonization unit, a gas-solid separation unit, and a separation and recovery unit connected in sequence. The system includes a heat supply unit comprising a combustion chamber and a steam chamber. The combustion chamber is connected between the drying and preheating unit and the separation and recovery unit. The combustion chamber receives combustible gas discharged from the separation and recovery unit and uses it to burn and heat the steam chamber. The combustion exhaust gas is introduced into the drying and preheating unit, and the steam chamber is connected to the carbonization unit. The technical solution of this application can increase the combustible components in the mixed gas produced during biomass carbonization, thereby improving energy utilization.

Description

Technical Field

[0001] This invention relates to the field of carbonization system technology, specifically to a biomass gas thermal carbonization system and its application. Background Technology

[0002] With the increasing demand for biomass resource recycling, biomass carbonization technology, as an important pathway for converting organic matter into stable biochar, has received widespread attention. Traditional pyrolysis or carbonization processes typically employ direct combustion with external heating or electric heating, resulting in low thermal efficiency and insufficient heat recovery, easily generating large amounts of underutilized pyrolysis gas, tar, and tail gas. Furthermore, many existing systems exhibit poor adaptability to different biomass feedstocks, leading to significant fluctuations in product yield and quality, and are mostly intermittent or semi-continuous production processes, impacting equipment utilization and operational efficiency.

[0003] To improve thermal efficiency and product quality, carbonization technologies that use steam as a heat carrier to transport heat to the reaction zone have emerged in recent years. A related technology discloses a continuous production system and method for biomass gas thermal carbonization. This system includes a high-temperature steam supply unit, where high-temperature steam acts as a heat transfer medium, directly contacting the biomass. During the biomass carbonization process, biomass gas and biomass oil are incorporated into the steam and separated from the biomass char in a cyclone separator. The resulting mixed gas can then be used to dry the biomass, achieving multiple uses of energy.

[0004] However, in practical engineering applications, there is a problem of low energy utilization of the mixed gas. Summary of the Invention

[0005] In view of the technical problems existing in the background art, the present application provides a biomass gas thermal carbonization system and its application. The biomass gas thermal carbonization system can increase the combustible components in the mixed gas generated during the biomass carbonization process and improve energy utilization.

[0006] To achieve the above objectives, in a first aspect, embodiments of this application provide a biomass gas thermal carbonization system, comprising a pulverizing unit, a drying and preheating unit, a carbonization unit, a gas-solid separation unit, and a separation and recovery unit connected in sequence, including: The heat supply unit includes a combustion chamber and a steam chamber. The combustion chamber is connected between the drying and preheating unit and the separation and recovery unit. The combustion chamber is used to receive the combustible gas discharged from the separation and recovery unit and to burn and heat the steam chamber. The combustion exhaust gas is introduced into the drying and preheating unit. The steam chamber is connected to the carbonization unit.

[0007] Furthermore, the separation and recovery unit is connected to the gas outlet of the gas-solid separation unit. The separation and recovery unit includes a cooling separator and two storage tanks. The two storage tanks are used to store biomass gas and biomass oil, respectively. The cooling separator is connected to the two storage tanks, and the two storage tanks are connected to the combustion chamber.

[0008] Furthermore, the separation and recovery unit also includes a condensate storage tank, which is connected to both the gas-solid separation unit and the steam chamber.

[0009] Furthermore, the heat supply unit fan and the cold air valve, the combustion chamber, the fan, the cold air valve and the combustion chamber are connected in sequence. The fan is used to extract the combustion exhaust gas in the combustion chamber, and the cold air valve is used to adjust the temperature of the combustion exhaust gas blown out by the fan.

[0010] Furthermore, the heat supply unit also includes a dust collector connected between the fan and the combustion chamber, used to filter particulate matter in the combustion exhaust gas.

[0011] Furthermore, the biomass gas thermal carbonization system also includes a jacketed flash explosion tube and a jacketed cyclone separator, which are connected between the carbonization unit and the gas-solid separation unit.

[0012] Furthermore, the carbonization unit includes a fluidized bed reactor and a fixed bed reactor, which are connected between the steam chamber and the jacketed flash explosion tube.

[0013] Furthermore, the heat supply unit also includes a steam superheater, which is connected between the steam chamber and the carbonization unit.

[0014] Furthermore, the drying and preheating unit and the carbonization unit constitute a processing assembly, and multiple processing assemblies are provided, which are connected in parallel between the steam chamber and the gas-solid separation unit.

[0015] Secondly, this application also proposes an application of the above-mentioned biomass gas thermal carbonization system for processing biomass raw materials and preparing biochar, biomass gas and biomass oil.

[0016] The beneficial effects of this application are as follows: In the technical solution of this application, by setting up a heat supply unit, the separation and recovery unit introduces the separated combustible biomass gas into the combustion chamber for combustion. The heat generated by combustion heats the steam chamber to generate steam. The steam is sent to the carbonization unit as a heat carrier to participate in the carbonization reaction. The high-temperature exhaust gas generated by combustion is sent to the drying and preheating unit to preheat and dry the pretreated biomass raw materials. The entire process recovers and burns all the combustible by-products generated by the carbonization reaction to provide energy, making full use of the combustible energy in the products. There is no need to introduce a large amount of additional fuel. At the same time, the waste heat of the combustion exhaust gas is also utilized, which improves the energy utilization rate of the entire system and reduces production energy consumption and cost.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the process of a biomass gas thermal carbonization system according to an embodiment of this application. Detailed Implementation

[0020] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0022] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0025] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0026] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0027] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0028] With the increasing demand for biomass resource recycling, biomass carbonization technology, as an important pathway for converting organic matter into stable biochar, has received widespread attention. Traditional pyrolysis or carbonization processes typically employ direct combustion with external heating or electric heating, resulting in low thermal efficiency and insufficient heat recovery, easily generating large amounts of underutilized pyrolysis gas, tar, and tail gas. Furthermore, many existing systems exhibit poor adaptability to different biomass feedstocks, leading to significant fluctuations in product yield and quality, and are mostly intermittent or semi-continuous production processes, impacting equipment utilization and operational efficiency.

[0029] To improve thermal efficiency and product quality, carbonization technologies that use steam as a heat carrier to transport heat to the reaction zone have emerged in recent years. A related technology discloses a continuous production system and method for biomass gas thermal carbonization. This system includes a high-temperature steam supply unit, where high-temperature steam acts as a heat transfer medium, directly contacting the biomass. During the biomass carbonization process, biomass gas and biomass oil are incorporated into the steam and separated from the biomass char in a cyclone separator. The resulting mixed gas can then be used to dry the biomass, achieving multiple uses of energy.

[0030] However, in practical engineering applications, there is a problem of low energy utilization of the mixed gas.

[0031] To address the aforementioned technical problems, in a first aspect, embodiments of this application provide a biomass gas thermal carbonization system, comprising a pulverizing unit, a drying and preheating unit, a carbonization unit, a gas-solid separation unit, and a separation and recovery unit connected in sequence, including a heat supply unit. The heat supply unit includes a combustion chamber and a steam chamber. The combustion chamber is connected between the drying and preheating unit and the separation and recovery unit. The combustion chamber is used to receive combustible gas discharged from the separation and recovery unit and to burn and heat the steam chamber. The combustion exhaust gas is introduced into the drying and preheating unit, and the steam chamber is connected to the carbonization unit.

[0032] like Figure 1 As shown, in the technical solution of this application, by setting up a heat supply unit, the separation and recovery unit introduces the separated combustible biomass gas into the combustion chamber for combustion. The heat generated by combustion heats the steam chamber to generate steam. The steam is sent to the carbonization unit as a heat carrier to participate in the carbonization reaction. The high-temperature exhaust gas generated by combustion is sent to the drying and preheating unit to preheat and dry the pretreated biomass raw materials. The entire process recovers and burns all the combustible by-products generated by the carbonization reaction to provide energy, making full use of the combustible energy in the products. It does not require the introduction of a large amount of additional fuel. At the same time, the waste heat of the combustion exhaust gas is also utilized, which improves the energy utilization rate of the entire system and reduces production energy consumption and cost.

[0033] It should be noted that the crushing unit can take many forms, such as any one of the following: a blade crusher, a hammer crusher, or a roller crusher. The appropriate type or combination of various crushing equipment can be selected to meet the crushing requirements based on the characteristics of the biomass raw material to be processed, the feed size, and the target output particle size. Specifically, the output particle size of the crushing unit is 1-5mm.

[0034] It can be explained that the drying and preheating unit can take various forms, such as any one of a drum dryer, disc dryer, or airflow dryer. It utilizes the high-temperature combustion exhaust gas from the combustion chamber as the drying heat source, removing excess moisture from the raw materials while preheating them. This reduces the impact of excessive moisture on the carbonization reaction temperature and efficiency, and lowers the energy burden of subsequent processing. Specifically, the heat source for the drying and preheating unit is the combustion exhaust gas generated by a steam boiler, with a temperature range of 100-150℃, used to control the biomass moisture content to 2-10%.

[0035] It can be explained that the gas-solid separation unit can take many forms, such as any one of a cyclone separator, a bag filter, or a vibrating screen, which can separate the gas-solid mixture carrying biochar particles, collect the biochar solid product, and allow the gaseous biomass gas, biomass oil, and steam mixture to flow into the subsequent separation and recovery unit, thereby improving the separation efficiency and solid product recovery rate.

[0036] In some embodiments, the separation and recovery unit is connected to the gas outlet of the gas-solid separation unit. The separation and recovery unit includes a cooling separator and two storage tanks. The two storage tanks are used to store biomass gas and biomass oil, respectively. The cooling separator is connected to the two storage tanks, and the two storage tanks are connected to the combustion chamber.

[0037] In this embodiment, the mixed gas output from the gas-solid separation unit is cooled by a cooling separator, causing the condensable biomass oil components in the mixed gas to condense and separate, and then sent to storage tanks for temporary storage. The separated biomass gas can be sent to the combustion chamber for combustion and energy supply, either in whole or in part, according to the system's energy demand. The biomass oil can also be sent to the combustion chamber for combustion and heat supply as needed, further improving the energy recovery rate of by-products and reducing the waste of combustible components.

[0038] In some embodiments, the separation and recovery unit further includes a condensate storage tank, which is connected to both the gas-solid separation unit and the steam chamber.

[0039] In this embodiment, condensate generated during gas-solid separation and cooling separation is collected by a condensate storage tank. The collected condensate can be sent to the steam chamber as a raw material for steam production, realizing the recycling of water resources, reducing the amount of external water replenishment, and reducing production water consumption.

[0040] In some embodiments, the heat supply unit fan and the cooling air valve, the combustion chamber, the fan, the cooling air valve and the combustion chamber are arranged in sequence. The fan is used to draw combustion exhaust gas from the combustion chamber, and the cooling air valve is used to adjust the temperature of the combustion exhaust gas blown out by the fan.

[0041] In this embodiment, combustion exhaust gas is extracted by a fan, and the exhaust gas temperature is adjusted by a cold air valve to ensure that the temperature of the exhaust gas entering the drying and preheating unit is stably controlled within a suitable range. This allows for flexible adjustment of exhaust gas parameters based on the initial moisture content of the raw materials. Specifically, the fan can be a heat-resistant fan.

[0042] In some embodiments, the heat supply unit further includes a dust collector connected between the fan and the combustion chamber for filtering particulate matter in the combustion exhaust gas.

[0043] In this embodiment, a dust collector filters out ash and incompletely burned particulate matter entrained in the combustion exhaust gas, reducing the amount of particulate matter entering the drying and preheating unit with the exhaust gas and contaminating the raw materials. This is beneficial to the purity of the subsequent carbonization products and also reduces the particulate matter content in the exhaust gas emissions. Specifically, the dust collector can be a cyclone dust collector.

[0044] In some embodiments, the biomass gas thermal carbonization system further includes a jacketed flash explosion tube and a jacketed cyclone separator, which are connected between the carbonization unit and the gas-solid separation unit.

[0045] In this embodiment, the jacketed flash explosion tube can instantly depressurize and flash evaporate the product after the carbonization reaction is completed, promoting the separation of biomass oil and biomass gas from biomass char, improving product separation efficiency. The subsequent jacketed cyclone separator pre-separates the crude biomass char, reducing the processing load of the subsequent gas-solid separation unit and improving the separation and processing capacity of the entire system.

[0046] In some embodiments, the carbonization unit includes a fluidized bed reactor and a fixed bed reactor, which are connected between a steam chamber and a jacketed flash explosion tube.

[0047] In this embodiment, the carbonization material is fluidized and heat-exchanged in a fluidized bed reactor, and then fed into a fixed bed reactor for isothermal carbonization. Combining the advantages of both reactors, this process allows for sufficient contact and heat exchange between high-temperature steam and biomass raw materials, improving the uniformity of the carbonization reaction. It also allows for stable control of the residence time during carbonization, adapting to the carbonization requirements of raw materials with different reactivity levels. Specifically, the atmospheric carbonization step can use a fluidized bed reactor, employing combustion exhaust gas at a temperature of 450-500℃ and a pressure of 1.0-8.0 kPa as a heat source, controlling the reaction temperature at 300-350℃ and the reaction time at 30-60 min, yielding biomass semi-char and atmospheric carbonization exhaust gas. The high-pressure carbonization step can use a fixed bed reactor, employing superheated steam at a temperature of 500-550℃ and a pressure of 2.0-4.0 MPa as a heat source, controlling the reaction temperature at 350-400℃ and the reaction time at 30-60 min, yielding a mixture of biomass char and high-pressure carbonization exhaust gas.

[0048] In some embodiments, the heat supply unit further includes a steam superheater connected between the steam chamber and the carbonization unit.

[0049] In this embodiment, the saturated steam output from the steam chamber is further heated by a steam superheater to raise the steam temperature to the superheated temperature required for the carbonization reaction. This ensures that the steam entering the carbonization unit meets the reaction temperature requirements, thereby improving the heating efficiency of the carbonization reaction. Specifically, the heat supply unit includes a saturated steam boiler and a steam superheater. The saturated steam boiler provides combustion exhaust gas with a temperature of 450-500℃, a pressure of 1.0-8.0 kPa, and an oxygen volume fraction of 2.0-8.0%. The steam superheater provides superheated steam with a temperature of 500-550℃ and a pressure of 2.0-4.0 MPa.

[0050] In some embodiments, the drying and preheating unit and the carbonization unit constitute a processing assembly, and multiple processing assemblies are provided, which are connected in parallel between the steam chamber and the gas-solid separation unit.

[0051] In this embodiment, by setting up multiple parallel processing components, different processing units can be switched for production according to production needs, so as to achieve continuous and uninterrupted carbonization operations. When one unit is maintained or the material is replaced, the other units can still operate normally, which improves the utilization rate of the whole set of equipment and the overall production efficiency.

[0052] Secondly, this application also proposes an application of the above-mentioned biomass gas thermal carbonization system for processing biomass raw materials and preparing biochar, biomass gas and biomass oil.

[0053] Understandably, by using the above-mentioned biomass gas thermal carbonization system to process biomass raw materials, it is possible to make full use of the combustible byproducts generated during the carbonization process to provide energy, thereby significantly reducing energy consumption and costs in the biomass carbonization production process.

[0054] The following are some specific embodiments. It should be noted that the embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in this field or according to the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be obtained commercially.

[0055] Example 1 (1) Select reeds that have been crushed to a particle size of 1.5 mm as raw materials.

[0056] (2) The raw material is fed into the drying and preheating unit and dried using combustion exhaust gas at 105°C. The moisture content of the material after drying is 3.0%.

[0057] (3) The dried material is transported to the carbonization unit and carbonized under normal pressure at a temperature of 455℃, a pressure of 2.0kPa, and an oxygen volume fraction of 3.0%. The carbonization temperature is controlled at 305℃ and the reaction time is 35min to obtain reed semi-carbon and normal pressure carbonization tail gas.

[0058] (4) The reed semi-charcoal was carbonized under high pressure at 2.2 MPa and 505℃ steam conditions, with the reaction temperature controlled at 355℃ and the reaction time at 35 min. After carbonization, the mixture of reed charcoal and high-pressure carbonization tail gas was obtained through a gas-solid separation unit.

[0059] (5) The mixture of atmospheric pressure carbonization tail gas and high pressure carbonization tail gas is purified, cooled and separated by the separation and recovery unit. The resulting combustible mixed gas and coolant biomass oil are used as fuel for steam boilers.

[0060] Example 2 (1) Select bamboo husks that have been crushed to a particle size of 3.0 mm as raw material.

[0061] (2) The raw material is fed into the drying and preheating unit and dried using combustion exhaust gas at 120°C. The moisture content of the material after drying is 5.0%.

[0062] (3) The dried material is transported to the carbonization unit and carbonized under normal pressure at a temperature of 470℃, a pressure of 4.0kPa, and an oxygen volume fraction of 5.0%. The carbonization temperature is controlled at 320℃ and the reaction time is 45min to obtain bamboo husk semi-charcoal and normal pressure carbonization tail gas.

[0063] (4) Bamboo husk charcoal is carbonized under high pressure at 2.8 MPa and 520℃ steam conditions. The reaction temperature is controlled at 370℃ and the reaction time is 45 min. After carbonization, the mixture of bamboo husk charcoal and high pressure carbonization tail gas is obtained through a gas-solid separation unit.

[0064] (5) The mixture of atmospheric pressure carbonization tail gas and high pressure carbonization tail gas is purified, cooled and separated by the separation and recovery unit. The resulting combustible mixed gas and coolant biomass oil are used as fuel for steam boilers.

[0065] Example 3 (1) Eucalyptus trees that have been crushed to a particle size of 4.5 mm are selected as raw materials.

[0066] (2) The raw material is fed into the drying and preheating unit and dried using combustion exhaust gas at 140°C. The moisture content of the material after drying is 8.0%.

[0067] (3) The dried material is transported to the carbonization unit and carbonized under normal pressure at a temperature of 490℃, a pressure of 6.5kPa, and an oxygen volume fraction of 7.0%. The carbonization temperature is controlled at 340℃ and the reaction time is 55min to obtain eucalyptus semi-charcoal and normal pressure carbonization tail gas.

[0068] (4) Eucalyptus semi-charcoal is carbonized under high pressure under steam conditions of 3.5 MPa and 550℃, with the reaction temperature controlled at 390℃ and the reaction time at 55 min. After carbonization, the mixture of eucalyptus charcoal and high-pressure carbonization tail gas is obtained through a gas-solid separation unit.

[0069] (5) The mixture of atmospheric pressure carbonization tail gas and high pressure carbonization tail gas is purified, cooled and separated by the separation and recovery unit. The resulting combustible mixed gas and coolant biomass oil are used as fuel for steam boilers.

[0070] Example 4 (1) Typical agricultural and forestry residues were selected as the mixed raw materials, which consisted of 40wt% straw powder, 30wt% sawdust, and 30wt% rice husk. The mixed raw materials were uniformly processed to a particle size of 2.5mm by a crushing unit.

[0071] (2) The mixed raw materials are fed into the drying and preheating unit and dried using combustion exhaust gas at 130°C. The moisture content of the dried material is controlled at 4.0%.

[0072] (3) The dried mixture is transported to the carbonization unit and carbonized under normal pressure at a temperature of 480℃, a pressure of 5.0 kPa, and an oxygen volume fraction of 6.0%. The carbonization temperature is controlled at 330℃ and the reaction time is 50 min to obtain mixed biomass semi-char and normal pressure carbonization tail gas.

[0073] (4) The mixed biomass semi-char is transferred to a high-pressure carbonization reactor and carbonized under superheated steam conditions of 3.0 MPa and 530 °C. The reaction temperature is controlled at 380 °C and the reaction time is 50 min. After carbonization, the product is quickly depressurized through a release valve and enters the gas-solid separation unit to obtain a mixture of high-quality mixed biomass char and high-pressure carbonization tail gas.

[0074] (5) The mixture of atmospheric pressure carbonization tail gas and high pressure carbonization tail gas is purified, cooled and separated by the separation and recovery unit. The combustible mixture obtained from the treatment and the biomass oil are all transported to the steam boiler for reuse as fuel, realizing the closed-loop utilization of energy in the system.

[0075] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A biomass gas thermal carbonization system, comprising a pulverizing unit, a drying and preheating unit, a carbonization unit, a gas-solid separation unit, and a separation and recovery unit connected in sequence, characterized in that, include: The heat supply unit includes a combustion chamber and a steam chamber. The combustion chamber is connected between the drying and preheating unit and the separation and recovery unit. The combustion chamber is used to receive the combustible gas discharged from the separation and recovery unit and to burn and heat the steam chamber. The combustion exhaust gas is introduced into the drying and preheating unit. The steam chamber is connected to the carbonization unit.

2. The biomass gas thermal carbonization system according to claim 1, characterized in that, The separation and recovery unit is connected to the gas outlet of the gas-solid separation unit. The separation and recovery unit includes a cooling separator and two storage tanks. The two storage tanks are used to store biomass gas and biomass oil, respectively. The cooling separator is connected to the two storage tanks, and the two storage tanks are connected to the combustion chamber.

3. The biomass gas thermal carbonization system according to claim 2, characterized in that, The separation and recovery unit also includes a condensate storage tank, which is connected to the gas-solid separation unit and the steam chamber.

4. The biomass gas thermal carbonization system according to claim 1, characterized in that, The heat supply unit fan and the cooling air valve, the combustion chamber, the fan, the cooling air valve and the combustion chamber are arranged in sequence and connected. The fan is used to draw combustion exhaust gas from the combustion chamber, and the cooling air valve is used to adjust the temperature of the combustion exhaust gas blown out by the fan.

5. The biomass gas thermal carbonization system according to claim 4, characterized in that, The heat supply unit also includes a dust collector, which is connected between the fan and the combustion chamber and is used to filter particulate matter in the combustion exhaust gas.

6. The biomass gas thermal carbonization system according to claim 1, characterized in that, The biomass gas thermal carbonization system also includes a jacketed flash explosion tube and a jacketed cyclone separator, which are connected between the carbonization unit and the gas-solid separation unit.

7. The biomass gas thermal carbonization system according to claim 1, characterized in that, The carbonization unit includes a fluidized bed reactor and a fixed bed reactor, which are connected between the steam chamber and the jacketed flash explosion tube.

8. The biomass gas thermal carbonization system according to claim 1, characterized in that, The heat supply unit also includes a steam superheater, which is connected between the steam chamber and the carbonization unit.

9. The biomass gas thermal carbonization system according to claim 1, characterized in that, The drying and preheating unit and the carbonization unit constitute a processing assembly. Multiple processing assemblies are provided and connected in parallel between the steam chamber and the gas-solid separation unit.

10. An application of the biomass gas thermal carbonization system as described in any one of claims 1-9, characterized in that, Used for processing biomass feedstocks to produce biochar, biogas, and biooil.

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