Green production system and production process capable of efficiently utilizing biomass

Abstract

The invention discloses a green production system and a production process capable of efficiently utilizing biomass. The production process comprises biomass treatment, methanol synthesis and biological fermentation. The green production system comprises a biomass treatment module, a methanol synthesis module and a biological fermentation module, after being input into the system, biomass is treated by the biomass treatment module and then enters the methanol synthesis module to serve as a raw material for preparing methanol, purge gas of the methanol synthesis module returns to the biomass treatment module to be used for treating newly input biomass, and the methanol purge gas is finally input into the biological fermentation module to be used for strain fermentation. According to the invention, environmental pollution caused by livestock manure generated in animal husbandry is reduced, and resource utilization and high-value utilization of biomass are realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste utilization, and in particular relates to a green production system and production process for efficiently utilizing biomass. Background Art

[0002] In recent years, animal husbandry has developed rapidly. Taking cattle farming as an example, with the development of large-scale cattle farms, the problem of fecal pollution in cattle farms has become increasingly prominent. Direct stacking of cow dung will pollute the environment, have a counter-effect on the cattle farm itself, and affect the sustainable development of the cattle industry. For example, if cow dung is not treated in time, it will not only occupy the private plots of cattle farmers, but also pollute nearby water sources and soil. Due to the large amount of accumulation of cow dung in some large-scale breeding bases, the surrounding surface water and groundwater are polluted to a certain extent after being washed by rainwater. Only by thoroughly solving the problem of fecal pollution generated by the breeding industry can the sustainable and healthy development of animal husbandry be promoted. The livestock manure produced by animal husbandry is a kind of biomass resource that can be utilized. Harmless and full use of these biomass resources is the key to preventing and eliminating livestock manure pollution. For example, CN2024107789464-A methanol production process and system proposes a technical solution for preparing methanol using biomass in conjunction with the electrolysis of water to produce hydrogen, but the waste gas and waste generated in the process of converting biomass into formaldehyde cannot be well treated, and true green production is still not achieved.

[0003] Based on this, the present invention intends to propose a green production system and corresponding production process that truly and efficiently utilizes biomass, so as to achieve the goal of near zero carbon emissions for the entire process system. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a green production system and production process for efficiently utilizing biomass, reduce the pollution of livestock manure produced by animal husbandry to the environment, and realize the resource and high-value utilization of biomass.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect of the present invention, the present invention provides a production process for efficiently utilizing biomass, comprising:

[0007] S1. Biomass treatment:

[0008] S1.1, separating the biomass solid and liquid, reducing the water content of the biomass, obtaining dehydrated biomass, and recovering the slag liquid;

[0009] S1.2, drying the dehydrated biomass by methanol purge gas, dispersing water and other volatile organic matter in the biomass, and mixing with the methanol purge gas to form a mixed gas, and then crushing the biomass to obtain crushed material;

[0010] The pyrolysis gas of some substances in the biomass is mixed with the methanol purge gas to form a mixed gas, and then the biomass is crushed to obtain crushed material;

[0011] S1.3, gasifying the crushed material to obtain synthesis gas, and recovering the gasification slag produced during the gasification process;

[0012] S2. Methanol synthesis:

[0013] S2.1, the synthesis gas in step S1.3 is converted and purified, and then used for methanol synthesis to obtain crude methanol, and the methanol purge gas generated in the methanol synthesis process is returned to step S1.2 for use;

[0014] S2.2, purifying the crude methanol to obtain a methanol product;

[0015] S3. Biological fermentation:

[0016] S3.1, using the mixed gas produced in step 1.2 for bacterial fermentation to obtain crude fermentation products and bacterial protein;

[0017] S3.2, purifying the crude fermentation product to obtain the fermentation product.

[0018] Preferably, the biomass includes agricultural and forestry crops and livestock and poultry manure. More preferably, the biomass includes one or more of straw, wood chips, cow dung and chicken manure.

[0019] Preferably, in step S1.1, after solid-liquid separation of the biomass, the water content of the biomass is ≤40%.

[0020] Preferably, in step S1.2, the drying times are greater than or equal to two times.

[0021] More preferably, in step S1.2, the drying times are twice;

[0022] After the biomass is dried for the first time, it is crushed once and the crushed materials are screened. The crushed materials that meet the requirements of gasification furnace directly enter the subsequent gasification treatment, and the remaining crushed materials are dried and crushed for the second time, and then the crushed materials are gasified.

[0023] More preferably, the first drying temperature is 80-300° C., the drying time is 1-5 h, and the second drying temperature is 100-300° C., the drying time is 1-5 h.

[0024] Preferably, in step S1.2, the gasification temperature is 1000-1500° C. and the pressure is 1.0-6.0 MPa.

[0025] Preferably, in step S2.1, the methanol synthesis temperature is 150-300°C and the pressure is 10-15 MPa.

[0026] Preferably, in step S3.1, the bacterial strain includes Clostridium aerovorum, the fermentation temperature is 10-70°C, and the fermentation time is 24-720 hours.

[0027] In a second aspect of the present invention, the present invention proposes a green production system for efficiently utilizing biomass, comprising a biomass processing module, a methanol synthesis module and a biological fermentation module;

[0028] After the biomass is input into the system, it is processed by the biomass processing module and then enters the methanol synthesis module as the raw material for methanol production. The exhaust gas of the methanol synthesis module returns to the biomass processing module to process the newly input biomass to form a mixed gas, and the mixed gas is finally input into the biological fermentation module for bacterial fermentation.

[0029] Beneficial effects:

[0030] The present invention integrates the three processes of biomass treatment, methanol synthesis and biological fermentation into an organic whole, reduces the environmental pollution caused by livestock manure produced by animal husbandry, and realizes the resource utilization and high-value utilization of biomass;

[0031] After treatment, biomass is used as raw material for methanol synthesis, and the off-gas from methanol synthesis is returned to biomass treatment for use. The heat in the off-gas is recycled in the biomass treatment process, and the off-gas and some of the dried substances in the biomass are mixed to form a mixed gas that directly enters the biological fermentation process for use as raw material for bacterial culture, ultimately obtaining co-produced chemicals and bacterial proteins, achieving near zero carbon emissions for the entire process, and providing a new technical path for coal-free chemical industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Shown is a schematic diagram of the production process of the present invention. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0034] The present invention proposes a production process for efficiently utilizing biomass, using biomass as raw material to produce methanol and other products, and utilizing biomass to produce products to the greatest extent, including the following steps:

[0035] S1. Biomass treatment:

[0036] S1.1, separating the biomass solid and liquid, reducing the water content of the biomass, obtaining dehydrated biomass, and recovering the slag liquid;

[0037] S1.2, drying the dehydrated biomass by methanol purge gas, dispersing water and other volatile organic matter in the biomass, and mixing with the methanol purge gas to form a mixed gas, and then crushing the biomass to obtain crushed material;

[0038] The pyrolysis gas of some substances in the biomass is mixed with the methanol purge gas to form a mixed gas, and then the biomass is crushed to obtain crushed material;

[0039] S1.3, gasifying the crushed material to obtain synthesis gas, and recovering the gasification slag produced during the gasification process;

[0040] S2. Methanol synthesis:

[0041] S2.1, the synthesis gas in step S1.3 is converted and purified, and then used for methanol synthesis to obtain crude methanol, and the methanol purge gas generated in the methanol synthesis process is returned to step S1.2 for use;

[0042] S2.2, purifying the crude methanol to obtain a methanol product;

[0043] S3. Biological fermentation:

[0044] S3.1, using the mixed gas produced in step 1.2 for bacterial fermentation to obtain crude fermentation products and bacterial protein;

[0045] S3.2, purifying the crude fermentation product to obtain the fermentation product.

[0046] In step S1.1, the liquid part after solid-liquid separation, i.e., the residue liquid, can be fermented to become liquid organic fertilizer. Taking cow dung as an example, generally, cow dung water, i.e., the residue liquid, will turn dark red in 3 to 7 days, and the odor will decrease. When the color turns dark and is basically odorless, liquid organic fertilizer for crop irrigation can be directly extracted.

[0047] In step S1.2, the temperature of methanol purge gas is about 160°C, which can effectively dry the water in biomass such as cow dung. At this temperature, some volatile gas components (such as VOC, i.e., volatile organic compounds) in cow dung volatilize and mix with water vapor into methanol purge gas to form a mixed gas. After the temperature of the mixed gas is reduced, it becomes liquid water and mixed gas dry gas. The mixed gas dry gas enters the fermentation system for subsequent biological fermentation processes. After the mixed gas dry gas enters the fermentation tank through purification and other steps, it is used as energy by Clostridium oxysporum to produce methanol or butanol and bacterial protein.

[0048] In step S1.3, the gasified slag can be recycled. The gasified slag can be used as agricultural fertilizer. The gasified slag contains a large amount of plant nutrients and trace elements, such as phosphorus, potassium, sulfur, iron, zinc, etc. The ash can be returned to the field to increase the fertilizer content of the soil, improve soil fertility and the quality of agricultural products. Biomass ash, i.e., gasified slag, can better improve the soil pH value, improve soil structure, and significantly promote the growth and yield of crops. Alternatively, the gasified slag can be used for soil improvement and restoration. The gasified slag is mostly alkaline and contains a variety of nutrients and trace elements. Applying the gasified slag to the soil can not only alleviate soil acidification, but also introduce nutrients into the soil. In addition, the organic carbon in the gasified slag can not only achieve carbon fixation, but also improve soil quality. The gasified slag can also be used for pollutant adsorption. The surface of the gasified slag is loose and porous, the pore structure is developed, the specific surface area is large, and it has strong adsorption properties. It is an ideal material for sewage treatment.

[0049] In step S2.1, the carbon-to-hydrogen ratio in the synthesis gas is adjusted by transformation. 2 -CO 2 ) / (CO+CO 2 ) is generally controlled between 2.05 and 2.15. This ratio is crucial for controlling side reactions, protecting catalyst activity, and maintaining suitable reaction conditions. If the hydrogen-to-carbon ratio is controlled too low, it is easy to increase side reactions, accelerate the decline of catalyst activity, and may also cause carbon deposition reactions; if the hydrogen-to-carbon ratio is controlled too high, it will cause hydrogen accumulation, increase the inert gas content, increase the amount of purge gas, and increase consumption. The crude synthesis gas H obtained in step S1.3 2 / CO is about 1, and the hydrogen-carbon ratio can be adjusted to the required ratio, generally 2: 1, by the subsequent steam shift reaction. The process of methanol synthesis is an existing process, and the present invention will not repeat it.

[0050] The bacterial protein obtained in step S3.1 is a high-protein and safe feed raw material, which can replace traditional protein raw materials such as soybean meal and fish meal, and has made certain research progress in its application in pig feed, poultry feed, and other animal feed. For example, adding 6-8% bacterial protein to pig concentrate can reduce feed costs without affecting product quality.

[0051] The present invention can efficiently utilize biomass to produce methanol, and belongs to a green production process. In the present invention, the three major processes of biomass treatment, methanol synthesis and biological fermentation form an organic whole. The biomass is used as a raw material for methanol synthesis after treatment, and the off-gas of methanol synthesis is returned to the biomass treatment for use. The heat in the off-gas is recycled in the biomass treatment process, and the off-gas and the partially baked substances in the biomass are mixed to form a mixed gas that directly enters the biological fermentation process for use as a raw material for bacterial culture, and finally obtains co-produced chemicals and bacterial proteins. The substances output by the entire production process can all be used as products, achieving near zero carbon emissions for the entire process, and providing a new technical path for coal-free chemical industry.

[0052] In the present invention, the biomass is preferably agricultural and forestry crops such as straw and sawdust, and common livestock and poultry manure, preferably herbivorous animal manure, mainly gasifying fibers, such as cow manure, horse manure, etc.

[0053] In step S1.1, after the solid-liquid separation of the biomass, the water content of the biomass is ≤40%, and the remaining water in the biomass can be removed by subsequent drying. Taking cow dung as an example, after the solid-liquid separation, a large amount of chlorine in the cow dung is taken out by the waste liquid, which effectively reduces the chlorine content in the dehydrated cow dung. If the chlorine content is too high, corrosive hydrogen chloride gas or solution will be formed in the subsequent gasification, which will corrode the wall of the gasifier tube and require additional alkaline compounds to be added for neutralization.

[0054] Preferably, the temperature during solid-liquid separation is controlled at 0-50°C and the working pressure is 0.1-5 MPa. For example, the temperature during solid-liquid separation is controlled at 25°C and the working pressure is 0.1 MPa.

[0055] In step S1.2, the number of drying times is determined according to the moisture content of the biomass after dehydration. Preferably, the number of drying times is greater than or equal to two times. After the first drying of the biomass, it is crushed once, and the crushed material is screened to make the particle size of biomass powder, such as cow dung powder, ≤2mm. The crushed biomass that meets the requirements for gasification into the furnace directly enters the subsequent gasification treatment, and the remaining crushed material is dried and crushed for the second time, and then the crushed material is gasified.

[0056] Preferably, the temperature of the first drying is 80-300°C, and the drying time is 1-5 hours, and the temperature of the second drying is 100-300°C, and the drying time is 1-5 hours. In the present invention, the process of drying biomass with methanol purge gas can be that the methanol purge gas enters the two drying devices separately, such as Figure 1As shown, the methanol purge gas may first enter the second drying equipment and then enter the first drying equipment, so as to make fuller use of the waste heat in the methanol purge gas. In addition, the high-temperature flue gas and by-product high-temperature steam generated during the production process can be used for biomass drying, and the temperature is required to be no higher than 300°C.

[0057] In step S1.2, the gasification temperature is 1000-1500° C., and the pressure is 1.0-6.0 MPa. For example, the gasification temperature is 1300° C., and the pressure is 4.0 MPa.

[0058] In the methanol synthesis process, the synthesis temperature is 150-300° C., the pressure is 10-15 MPa, and the catalyst is a copper-based catalyst represented by Cu-Zn-Cr. The methanol synthesis process is an existing process and will not be described in detail in the present invention.

[0059] The present invention mainly uses synthesis gas formed by biomass gasification as raw material to prepare methanol, which effectively reduces the pollution of livestock manure to the environment. Therefore, the methanol prepared by the present invention is green methanol.

[0060] In the biological fermentation process, the bacterial species include Clostridium aeruginosa, and the Clostridium aeruginosa used specifically includes but is not limited to Clostridium ljungdahlii, Clostridium autoethanogenum, Clostridium carboxydophorum, Clostridium jendalofugal, etc., using carbon monoxide, carbon dioxide, etc. as raw materials to produce a variety of chemicals, such as acetic acid, ethanol, butanol, isopropanol and other crude fermentation products.

[0061] In step S3.1, the fermentation temperature is 10-70°C and the fermentation time is 24-720h. It is easy to understand that after multiple dryings, the methanol purge gas still has a certain amount of residual heat, which can be directly used in bacterial fermentation, and the mixed gas formed by the methanol purge gas and the gas dried out of the biomass is the raw material for bacterial fermentation, realizing the high-value utilization of the methanol purge gas and even achieving zero emissions.

[0062] It is easy to understand that the present invention can realize the fermentation of multiple bacterial species and obtain multiple fermentation products and bacterial proteins.

[0063] Taking cow dung as an example, the collected fresh cow dung is passed through a solid-liquid separator to reduce the water content to below 40%, and dehydrated cow dung and slag liquid are obtained. The slag liquid takes away a large amount of chlorine in the cow dung, effectively reducing the chlorine content in the dehydrated cow dung; the dehydrated cow dung is dried once with methanol purge gas and crushed once, and then screened. The cow dung powder that meets the gasification furnace requirements is directly gasified, and the remaining cow dung is dried twice with methanol purge gas and crushed twice. After meeting the feeding requirements of the gasification device, it is sent to gasification treatment. The cow dung powder is gasified into synthesis gas, and after transformation, purification and other steps, it enters the methanol synthesis system to obtain crude methanol. The crude methanol is distilled to obtain methanol products. The purge gas generated by the methanol synthesis system is used for the primary and secondary drying of the dehydrated cow dung. The obtained cow dung pyrolysis gas is filtered and sent to the biological fermentation system. Different chemicals are obtained through different fermentation strains, and bacterial protein is produced as a by-product.

[0064] Based on the above production process, the present invention also proposes a green production system for efficiently utilizing biomass, including a biomass processing module, a methanol synthesis module and a biological fermentation module. The three are interconnected to form an organic whole. After the biomass is input into the system, it enters the methanol synthesis module as a raw material for producing methanol after being processed by the biomass processing module, and the exhaust gas of the methanol synthesis module returns to the biomass processing module for processing the newly input biomass, and is finally input into the biological fermentation module for bacterial fermentation. Therefore, the present invention realizes efficient utilization of biomass.

[0065] The biomass processing module comprises a solid-liquid separation device, a drying device, a crushing device, a gasification device, a conversion device and a purification device which are connected in sequence, wherein a transport device is arranged between adjacent devices.

[0066] Taking double drying as an example, the drying device includes a primary drying device and a secondary drying device, the crushing device includes a primary crushing device and a secondary crushing device, the primary drying device is connected to the primary crushing device, the secondary drying device is connected to the secondary crushing device, the primary crushing device and the secondary crushing device are both connected to the gasification device, and a screening device is arranged between the primary crushing device and the secondary crushing device.

[0067] The methanol synthesis module includes a methanol synthesis device and a methanol purification device connected in sequence, the methanol synthesis device is connected to the purification device, and the methanol off-gas of the methanol synthesis device enters the primary drying device and the secondary drying device. The methanol purification device can be a distillation device or other applicable purification devices.

[0068] The bio-fermentation module includes a bio-fermentation device and a product purification device connected in sequence, and the methanol purge gas in the primary drying device and the secondary drying device enters the bio-fermentation device. The product purification device can be a distillation device or other applicable purification devices.

[0069] Taking the production of green methanol from cow dung as an example, the following application examples are provided to illustrate the specific technical solutions, specific application scenarios and effects of the present invention:

[0070] Cowsheds in Inner Mongolia generally use red brick floors. The (fresh) cow dung produced daily is simply collected, water is added to adjust the concentration, and it is sent to a screw-type solid-liquid separator for solid-liquid separation, resulting in dry cow dung with a moisture content of about 40% and slag liquid with cow dung urine, cow dung residue, dust, etc. as the main components. The slag liquid is discharged into the waste liquid pool and fermented for 3 to 7 days. It is collected by a dung water truck, water is added to adjust the concentration, and it is used as liquid organic fertilizer for farmland irrigation. The dry cow dung with a moisture content of 40% enters the drying device and is baked with 160°C methanol exhaust gas for 3 hours to obtain cow dung with a moisture content of less than 5%. The cow dung is sent to the crushing device for crushing, and the cow dung powder with a particle size of less than 2mm is screened and sent to the gasification device. The cow dung powder larger than 2mm is sent to the secondary drying device and baked with 160°C methanol exhaust gas for 2 hours to obtain cow dung with a moisture content of less than 3%. The cow dung is sent to the secondary crushing device for crushing, and the cow dung powder with a particle size of less than 2mm is sent to the gasification device. The cow dung powder is gasified in the gasifier to obtain Crude synthesis gas and gasification slag. The gasification slag is a good organic fertilizer and soil conditioner, which can be used to backfill farmland and improve local sandy soil. The hydrogen-carbon ratio of crude synthesis gas is about 1:1. The hydrogen-carbon ratio is adjusted to 2.1 by the steam conversion system, and then the impurities are removed by desulfurization and decarbonization in the purification system to obtain pure synthesis gas. The purified synthesis gas is sent to the methanol synthesis system, and after catalytic synthesis, crude methanol product and waste catalyst are obtained. The waste catalyst is regularly recovered and sent for regeneration treatment. The crude methanol is distilled to obtain a methanol product with a concentration higher than 99%. The off-gas produced by the methanol synthesis system is mainly composed of hydrogen, methane, carbon monoxide, carbon dioxide, water vapor, nitrogen, etc., of which the volume content of hydrogen is about 80%. The off-gas temperature is about 160°C, which can be used as a heat source for the drying device to dry the moisture in cow dung with a moisture content of 40% to less than 5%. The generated water vapor and VOC are mixed with the off-gas to form a mixed gas. After entering the biological fermentation system, the mixed gas is first purified to remove impurities, and then enters the fermentation tank to provide energy and food for ethanol Clostridium. After 168 hours of fermentation, continuous ethanol Clostridium metabolites of crude ethanol and bacterial protein are obtained. The crude ethanol is distilled to obtain an ethanol product with a concentration higher than 95%, and the bacterial protein is purified to obtain a bacterial protein product for feed.

[0071] The embodiments provided by the present invention are described in detail above. Specific examples are used herein to describe the principles and implementation methods of the present invention, and the description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A production process for efficiently utilizing biomass, characterized in that: include: S1. Biomass treatment: S1.1, separating the biomass solid and liquid, reducing the water content of the biomass, obtaining dehydrated biomass, and recovering the slag liquid; S1.2, drying the dehydrated biomass by methanol purge gas, dispersing water and other volatile organic matter in the biomass, and mixing with the methanol purge gas to form a mixed gas, and then crushing the biomass to obtain crushed material; The pyrolysis gas of some substances in the biomass is mixed with the methanol purge gas to form a mixed gas, and then the biomass is crushed to obtain crushed material; S1.3, gasifying the crushed material to obtain synthesis gas, and recovering the gasification slag produced during the gasification process; S2. Methanol synthesis: S2.1, the synthesis gas in step S1.3 is converted and purified, and then used for methanol synthesis to obtain crude methanol, and the methanol purge gas generated in the methanol synthesis process is returned to step S1.2 for use; S2.2, purifying the crude methanol to obtain a methanol product; S3. Biological fermentation: S3.1, using the mixed gas produced in step 1.2 for bacterial fermentation to obtain crude fermentation products and bacterial protein; S3.2, purifying the crude fermentation product to obtain the fermentation product.

2. The production process for efficiently utilizing biomass according to claim 1, characterized in that: The biomass includes agricultural and forestry crops and livestock and poultry manure; Preferably, the biomass includes one or more of straw, wood chips, cow dung and chicken dung.

3. The production process for efficient utilization of biomass according to claim 1, characterized in that: In step S1.1, after the biomass is separated from the solid and liquid, the water content of the biomass is ≤40%.

4. The production process for efficient utilization of biomass according to claim 3, characterized in that: In step S1.2, the drying times are greater than or equal to two times.

5. The production process for efficiently utilizing biomass according to claim 4, characterized in that: In step S1.2, the drying times are two times; After the biomass is dried for the first time, it is crushed once and the crushed materials are screened. The crushed materials that meet the requirements of gasification furnace directly enter the subsequent gasification treatment, and the remaining crushed materials are dried and crushed for the second time, and then the crushed materials are gasified.

6. The production process for efficient utilization of biomass according to claim 5, characterized in that: The first drying temperature is 80-300°C, and the drying time is 1-5 hours. The second drying temperature is 100-300°C, and the drying time is 1-5 hours.

7. The production process for efficient utilization of biomass according to any one of claims 1 to 6, characterized in that: In step S1.2, the gasification temperature is 1000-1500°C and the pressure is 1.0-6.0 MPa.

8. The production process for efficiently utilizing biomass according to claim 1, characterized in that: In step S2.1, the methanol synthesis temperature is 150-300°C and the pressure is 10-15 MPa.

9. The production process for efficiently utilizing biomass according to claim 1, characterized in that: In step S3.1, the bacterial species includes Clostridium aerovorum; Preferably, the aerotrophic Clostridium includes one or more of Clostridium ljungdahlii, Clostridium autoethanogenum, Clostridium carboxydotrophicum and Clostridium ljungdahlii; The fermentation temperature is 10-70°C, and the fermentation time is 24-720h.

10. A green production system for efficient utilization of biomass, characterized in that: A production process for efficiently utilizing biomass according to any one of claims 1 to 9, comprising a biomass processing module, a methanol synthesis module and a biofermentation module; After the biomass is input into the system, it is processed by the biomass processing module and then enters the methanol synthesis module as the raw material for methanol production. The exhaust gas of the methanol synthesis module returns to the biomass processing module to process the newly input biomass to form a mixed gas, and the mixed gas is finally input into the biological fermentation module for bacterial fermentation.

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