A green alcohol production system of anaerobic hydrogen production coupled with biomass gasification

Abstract

The utility model provides an anaerobic hydrogen production coupling biomass gasification's green alcohol production system, and biomass pretreatment equipment is provided with biomass feeding port, and the export of biomass pretreatment equipment is connected with anaerobic hydrogen production device, and anaerobic hydrogen production device is provided with biological enzyme feeding port, and the gas outlet of anaerobic hydrogen production device is connected with scrubbing tower, and the gas outlet of scrubbing tower is connected with hydrogen tank, the liquid outlet of anaerobic hydrogen production device is connected with organic acid incinerator, and the gas outlet of organic acid incinerator enters gasification agent heater, and the material outlet of gasification agent heater is connected with biomass gasification device, and biomass gasification device is provided with biomass feeding port, and the export of biomass gasification device is connected with green alcohol synthesis device, and the input end of green alcohol synthesis device is also connected with hydrogen tank, and the output end of green alcohol synthesis device is connected with green alcohol storage tank, the utility model discloses reduce the heat consumption of biomass gasification system, the utility model discloses be applicable to green alcohol production, especially the scene that the project periphery cannot obtain green electricity, cannot directly adopt green electricity and prepares green hydrogen.

Description

Technical Field

[0001] This utility model relates to a green alcohol production system that couples anaerobic hydrogen production with biomass gasification. Background Technology

[0002] Biomass gasification can use steam or air as a gasifying agent. The main components of the product are carbon monoxide, nitrogen, carbon dioxide, steam, and hydrogen. Carbon monoxide and hydrogen can be converted into methanol under the action of a catalyst.

[0003] The main component of biomass is cellulose, with a carbon-to-hydrogen ratio of 6:10, while methanol has a carbon-to-hydrogen ratio of 1:4. Therefore, the production of chlorophyll from biomass gasification products often results in a carbon-to-hydrogen ratio that does not meet the requirements. Green hydrogen is usually produced by electrolyzing water with green electricity as a supplementary source of hydrogen.

[0004] CN119505958 discloses a biomass gasification and new energy electrolysis hydrogen production coupled green alcohol co-firing system and method. The system includes: a new energy power generation device for generating electricity; a water electrolysis hydrogen production device for generating H2 and O2 based on water and electricity generated by the new energy power generation device; a biomass gasification device for gasifying biomass based on air and O2 generated by the water electrolysis hydrogen production device to generate CO and H2; a methanol production device for generating methanol based on CO and H2 generated by the biomass gasification device and H2 generated by the water electrolysis hydrogen production device; and a furnace combustion device for co-firing the methanol generated by the methanol production device.

[0005] CN116478014 discloses a process and system for preparing green methanol and co-producing carbon dioxide, including new energy power generation, water electrolysis, biomass power generation, carbon dioxide purification, biomass gasification, methanol synthesis, and methanol distillation. By coupling biomass power generation and biomass gasification, part of the primary CO2 product obtained after purification of the CO2 generated by biomass combustion power generation is sent to biomass gasification, while the other part can be distilled to obtain food-grade CO2 product for external distribution.

[0006] CN222593768 discloses a combined device for green electricity hydrogen production and biomass gasification to produce green methanol, including a biomass gasification device, wherein the crude syngas outlet of the biomass gasification device is sequentially connected to a syngas purification device and a methanol synthesis device; it also includes a green electricity hydrogen production device, wherein the hydrogen outlet of the green electricity hydrogen production device is connected to the methanol synthesis device, and the oxygen outlet of the green electricity hydrogen production device is connected to the biomass gasification device.

[0007] The hydrogen source required for the production of phytol in CN119505958, CN116478014 and CN222593768 comes from hydrogen production by water electrolysis. Utility Model Content

[0008] The technical problem to be solved by this utility model is: how to produce green alcohol under the condition that green electricity cannot be obtained and green hydrogen cannot be produced by green electricity. Therefore, a green alcohol production system coupled with anaerobic hydrogen production and biomass gasification is provided.

[0009] To solve the above problems, this utility model is achieved through the following technical solution: A green alcohol production system coupled with anaerobic hydrogen production and biomass gasification includes a biomass pretreatment device with a biomass inlet, an outlet of which is connected to an anaerobic hydrogen production unit, a bio-enzyme feed inlet of the anaerobic hydrogen production unit, an outlet of which is connected to a scrubbing tower, and an outlet of which is connected to a hydrogen tank. The outlet of the anaerobic hydrogen production device is connected to an organic acid incinerator. The gas outlet of the organic acid incinerator enters a gasifying agent heater. The material outlet of the gasifying agent heater is connected to a biomass gasification device. The biomass gasification device is equipped with a biomass feed inlet. The outlet of the biomass gasification device is connected to a chlorophyll synthesis device. The input end of the chlorophyll synthesis device is also connected to a hydrogen tank. The output end of the chlorophyll synthesis device is connected to a chlorophyll storage tank.

[0010] The biomass gasification device is a gasifier, which is equipped with a biomass feed inlet.

[0011] The gasifying agent heater is a gas-to-gas heat exchanger. One inlet of the gas-to-gas heat exchanger is the gasifying agent inlet, and the gasifying agent is water vapor. The other inlet of the gas-to-gas heat exchanger is connected to the gas outlet of the organic acid incinerator.

[0012] Biomass pretreatment equipment includes one or more combinations of mechanical pretreatment equipment, thermochemical treatment equipment, thermophysical treatment equipment, and biological pretreatment equipment.

[0013] Compared with existing technologies, this invention has the following advantages: This invention belongs to a green alcohol production system involving only biomass. It uses biological enzymes and hydrogen-producing bacteria to generate hydrogen in an anaerobic environment, replacing conventional green electricity hydrogen production. Simultaneously, it couples the combustion heat of the anaerobic hydrogen production liquid products with the biomass gasification system, reducing the heat consumption of the biomass gasification system. This invention is suitable for green alcohol production, especially in scenarios where green electricity cannot be obtained nearby or green hydrogen cannot be directly produced from green electricity. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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 this utility model and simplifying the description, and do not 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 this utility model.

[0017] like Figure 1 As shown, a green alcohol production system coupled with anaerobic hydrogen production and biomass gasification includes a biomass pretreatment device 1, which is provided with a biomass inlet. The outlet of the biomass pretreatment device 1 is connected to an anaerobic hydrogen production device 2, which is provided with a bio-enzyme feeding port. The outlet of the anaerobic hydrogen production device 2 is connected to a scrubbing tower 3, and the outlet of the scrubbing tower 3 is connected to a hydrogen tank 4.

[0018] The liquid outlet of the anaerobic hydrogen production device 2 is connected to the organic acid incinerator 5. The gas outlet of the organic acid incinerator 5 enters the gasifying agent heater 6. The material outlet of the gasifying agent heater 6 is connected to the biomass gasification device 7. The biomass gasification device 7 is equipped with a biomass feed inlet. The outlet of the biomass gasification device 7 is connected to the chlorophyll synthesis device 8. The input end of the chlorophyll synthesis device 8 is also connected to the hydrogen tank 4. The output end of the chlorophyll synthesis device 8 is connected to the chlorophyll storage tank 9.

[0019] Furthermore, the biomass pretreatment equipment 1 includes one or more combinations of mechanical pretreatment equipment, thermochemical treatment equipment, thermophysical treatment equipment, and biological pretreatment equipment, which are mainly determined according to the type of biomass.

[0020] The mechanical pretreatment equipment here can be slicers, crushers, and other mechanical processing equipment, used to cut raw materials such as wood and straw into regular slices or crush them.

[0021] The thermochemical treatment equipment here efficiently destroys the structure of lignocellulose through the combined action of heat and chemical reagents. It can be a steam treatment device or a dilute acid pretreatment device. The steam treatment device maintains the biomass in high temperature and high pressure saturated steam for a period of time, and then releases the pressure instantly, causing the water in the cell wall to vaporize and "explode" instantly, thereby physically tearing it apart. The dilute acid pretreatment device uses low concentrations of sulfuric acid, hydrochloric acid, etc., to hydrolyze hemicellulose at a moderate temperature (usually 160-200°C), making the cellulose more accessible to enzymes.

[0022] The thermophysical processing equipment here mainly removes moisture or changes physical properties, primarily dryers or desiccant machines.

[0023] The biological pretreatment equipment here uses microorganisms (mainly white-rot fungi, etc.) to degrade lignin, and is mainly in the form of solid fermentation tanks or reaction chambers.

[0024] Furthermore, the gasifying agent heater 6 is a gas-to-gas heat exchanger. One inlet of the gas-to-gas heat exchanger is the gasifying agent inlet, and the gasifying agent is water vapor. The other inlet of the gas-to-gas heat exchanger is connected to the outlet of the organic acid incinerator 5.

[0025] Furthermore, the biomass gasification device 7 is a gasifier, which is equipped with a biomass feed inlet. The gasifier converts solid biomass (such as wood chips, straw, rice husks, etc.) into combustible gas (mainly composed of carbon monoxide, hydrogen, methane, etc.) under high temperature and limited oxygen conditions.

[0026] Furthermore, the chlorophyll synthesis unit 8 is a synthesis reactor, with one input being the biomass gasification gas (carbon monoxide, carbon dioxide, hydrogen, and water vapor) output from the biomass gasification unit 7, and the other input being the hydrogen generated by fermentation in the anaerobic hydrogen production unit 2, which generates methanol in the synthesis reactor.

[0027] It should be noted that the anaerobic hydrogen production unit 2, the washing tower 3, and the organic acid incinerator 5 are existing structures and can be commercially available products.

[0028] The working principle of this utility model is as follows: After passing through the biomass pretreatment equipment 1, the biomass enters the anaerobic hydrogen production unit 2. The anaerobic hydrogen production unit 2 is equipped with a bio-enzyme feed port, allowing anaerobic microorganisms to degrade organic matter and generate hydrogen using enzymes such as nitrogenase or hydrogenase. This process does not rely on light energy. The microorganisms involved include obligate anaerobes, facultative anaerobes, and a few aerobic bacteria. The products of anaerobic hydrogen production are gaseous carbon dioxide and hydrogen, and liquid organic acids. The gaseous products, after impurity gas removal in the scrubbing tower 3, are mainly composed of hydrogen, which is stored in the hydrogen tank 4. The liquid organic acids are incinerated in the organic acid incinerator 5. The heat generated in the organic acid incinerator 5 enters the gasifying agent heater 6, where it is used to heat the biomass gasifying agent. The biomass gasifying agent is water vapor. The gasifying agent heater 6 is a gas-to-gas heat exchanger; the high-temperature flue gas generated by the combustion of organic acids heats the biomass gasifying agent water vapor, reducing the heat consumption of the biomass gasification unit 7.

[0029] The biomass gasification device 7 is also equipped with a biomass inlet. In the biomass gasification device 7, biomass reacts with the biomass gasifying agent, water vapor, to generate biomass fuel gas. This invention uses water vapor as the gasifying agent, which can increase the hydrogen content in the gasified gas. The gasifying agent, heated by the flue gas from the organic acid combustion, enters the biomass gasification device 7 to generate biomass gasified gas. The main components of the biomass gasified gas are carbon monoxide, carbon dioxide, hydrogen, and water vapor. The biomass gasified gas generated by the biomass gasification device 7 and the hydrogen generated by fermentation in the anaerobic hydrogen production device 2 enter the chlorophyll synthesis device 8 to generate chlorophyll, which is then stored in the chlorophyll storage tank 9.

[0030] This invention proposes a green alcohol production system involving only biomass. It utilizes bio-enzymes and hydrogen-producing bacteria to generate hydrogen under anaerobic conditions, replacing conventional green electricity hydrogen production. Simultaneously, it couples the combustion heat of the anaerobic hydrogen production liquid products with the biomass gasification system, reducing the heat consumption of the biomass gasification system. This invention is applicable to green alcohol production, particularly in scenarios where green electricity is unavailable in the surrounding area or cannot be directly used to produce green hydrogen.

[0031] This invention provides a system for producing green alcohol entirely from biomass under conditions where green electricity is unavailable or green hydrogen cannot be produced from green electricity. This is the innovation of this invention and the difference between this invention and CN119505958, CN116478014, and CN222593768.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A chlorophyll production system for anaerobic hydrogen production coupled with biomass gasification, characterized in that: It includes a biomass pretreatment device (1), which is equipped with a biomass inlet. The outlet of the biomass pretreatment device (1) is connected to an anaerobic hydrogen production device (2). The anaerobic hydrogen production device (2) is equipped with a biological enzyme feeding port. The outlet of the anaerobic hydrogen production device (2) is connected to a scrubbing tower (3). The outlet of the scrubbing tower (3) is connected to a hydrogen tank (4). The outlet of the anaerobic hydrogen production device (2) is connected to the organic acid incinerator (5), the gas outlet of the organic acid incinerator (5) enters the gasifying agent heater (6), the material outlet of the gasifying agent heater (6) is connected to the biomass gasification device (7), the biomass gasification device (7) is provided with a biomass feed inlet, the outlet of the biomass gasification device (7) is connected to the green alcohol synthesis device (8), the input end of the green alcohol synthesis device (8) is also connected to the hydrogen tank (4), and the output end of the green alcohol synthesis device (8) is connected to the green alcohol storage tank (9).

2. The chlorophyll production system for anaerobic hydrogen production coupled with biomass gasification according to claim 1, characterized in that: The biomass gasification device (7) is a gasifier, which is equipped with a biomass feed inlet.

3. The chlorophyll production system for anaerobic hydrogen production coupled with biomass gasification according to claim 1, characterized in that: The gasifying agent heater (6) is a gas-to-gas heat exchanger. One of the gas inlets of the gas-to-gas heat exchanger is the gasifying agent inlet. The gasifying agent is water vapor. The other gas inlet of the gas-to-gas heat exchanger is connected to the outlet of the organic acid incinerator (5).

4. The chlorophyll production system for anaerobic hydrogen production coupled with biomass gasification according to claim 1, characterized in that: Biomass pretreatment equipment (1) includes one or more combinations of mechanical pretreatment equipment, thermochemical treatment equipment, thermophysical treatment equipment, and biological pretreatment equipment.

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