Methanol production system

Abstract

The utility model relates to the technical field of biomass resource utilization, in particular to a methanol production system which comprises a biogas compressor, a biogas reformer, a methanol synthesizer and a condensation tank which are sequentially connected through pipelines, the biogas reformer is used for carrying out catalytic reaction on biogas to obtain carbon monoxide and hydrogen; the methanol synthesizer is used for catalytically synthesizing carbon monoxide and hydrogen into methanol; a gas-fired boiler is arranged between the methane reformer and the methanol synthesizer, and the gas-fired boiler provides heat for the methane reformer and the methanol synthesizer. According to the methanol production system disclosed by the utility model, in the first stage, the methane reformer is used for carrying out catalytic reforming on methane to generate synthesis gas of carbon monoxide and hydrogen, and then the methanol synthesizer is used for carrying out two-stage Fischer-Tropsch synthesis to produce green methanol, so that high-valued utilization of biomass methane can be realized, and convenient conditions can be provided for long-distance conveying of products.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass resource utilization, in particular to a methanol production system. Background Art

[0002] Biomass raw materials mainly include various types of urban and rural organic wastes such as crop straw, farm waste, domestic garbage, and industrial organic wastewater; biomass is used as raw material, and the combustible gas mainly containing methane produced through thermochemical conversion or biochemical conversion is called biogas. Biogas includes two major categories. One is the incomplete combustion and pyrolysis of biomass under high temperature and oxygen-deficient conditions, which produces combustible gases mainly composed of carbon monoxide, hydrogen, nitrogen, etc., which is called gasification gas; the other is the decomposition of biomass by anaerobic bacteria under anaerobic conditions, which produces combustible gases mainly composed of methane and carbon dioxide, which is called biogas.

[0003] As a green gaseous fuel, biomass gas can be used and stored at short distances. However, for some areas with abundant biomass resources, biomass gas cannot be fully utilized. Therefore, it is very necessary to convert gaseous fuel into liquid fuel that is easy to store, transport and use.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The utility model aims to provide a methanol production system, which can convert biogas into transportable liquid fuel by catalytic reforming means, thus providing a new option for high-value utilization of biomass resources.

[0006] The utility model provides a methanol production system, comprising: a biogas compressor, a biogas reformer, a methanol synthesizer and a condensing tank which are connected in sequence through pipelines; the biogas reformer is used for catalytically reacting biogas into carbon monoxide and hydrogen; the methanol synthesizer is used for catalytically synthesizing carbon monoxide and hydrogen into methanol; a gas boiler is arranged between the biogas reformer and the methanol synthesizer, and the gas boiler provides heat for the biogas reformer and the methanol synthesizer.

[0007] In the present invention, the biogas includes but is not limited to biomass biogas.

[0008] Preferably, it also includes: an insulated container; the biogas compressor, biogas reformer, gas boiler, methanol synthesizer, and condensing tank are all located in the insulated container.

[0009] Preferably, a biogas inlet is provided on one side of the thermal insulation container, and the biogas inlet is connected to a biogas compressor; a methanol outlet is provided on the other side of the thermal insulation container, and the methanol outlet is connected to a condensation tank via a methanol pump.

[0010] Preferably, the biogas reformer is provided with a first inlet, a second inlet and a first outlet;

[0011] The first inlet of the biogas reformer is connected to the biogas compressor, the second inlet of the biogas reformer is connected to the gas boiler, and the first outlet of the biogas reformer is connected to the methanol synthesizer.

[0012] Preferably, the methanol synthesizer is provided with a first inlet, a second inlet and a first outlet;

[0013] The first inlet of the methanol synthesizer is connected to the biogas reformer, the second inlet of the methanol synthesizer is connected to the gas boiler, and the first outlet of the methanol synthesizer is connected to the condensation tank.

[0014] Preferably, the gas boiler is provided with a first outlet and a second outlet; the first outlet of the gas boiler is connected to the biogas reformer, and the second outlet of the gas boiler is connected to the methanol synthesizer.

[0015] Preferably, the condensation tank is provided with a first inlet, a first outlet and a second outlet; the first inlet of the condensation tank is connected to the methanol synthesizer, the first outlet of the condensation tank is connected to the methanol pump, and the second outlet of the condensation tank is connected to the methanol synthesizer.

[0016] Preferably, the second outlet of the condensation tank is connected to the pipeline between the biogas reformer and the methanol synthesizer through a reflux pipeline.

[0017] Preferably, a catalyst is provided in the biogas reformer, and the catalyst includes but is not limited to a nickel-based catalyst, for example: Ni / La2O3, Ni / SBA-15, Ni / 6MnOx-CeO2 catalyst, etc.

[0018] Preferably, a catalyst is provided in the methanol synthesizer, and the catalyst includes but is not limited to a copper-based catalyst, for example: CuO / ZnO / Cr2O3, CuO / ZnO / Al2O3, CuO / ZnO / Si2O3 catalyst, etc.

[0019] Preferably, a condensing agent, such as desalted water, is provided in the condensing tank.

[0020] Beneficial effects:

[0021] The methanol production system of the utility model utilizes a biogas reformer to catalytically reform biogas in the first stage to generate synthesis gas of carbon monoxide and hydrogen, and then uses a methanol synthesizer to perform a second-stage Fischer-Tropsch synthesis to produce green methanol, thereby achieving high-value utilization of biomass biogas and providing convenient conditions for long-distance transportation of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the system structure for producing green methanol using biogas provided by the utility model.

[0024] Figure 2 A top view of a system for producing green methanol using biogas provided by the utility model.

[0025] Explanation of the reference numerals: 1. Insulated container; 2. Biogas compressor; 3. Biogas reformer; 4. Gas boiler; 5. Nickel-based catalyst; 6. Copper-based catalyst; 7. Methanol synthesizer; 8. Condensation tank; 9. Condensing agent; 10. Methanol pump; 11. Biogas inlet; 12. Methanol outlet. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] The present embodiment provides a methanol production system, comprising: a biogas compressor 2, a biogas reformer 3, a methanol synthesizer 7 and a condensation tank 8 connected in sequence by pipelines; the biogas reformer 3 is used to catalyze the biogas reaction into carbon monoxide and hydrogen; the methanol synthesizer 7 is used to catalyze the synthesis of carbon monoxide and hydrogen into methanol; a gas boiler 4 is arranged between the biogas reformer 3 and the methanol synthesizer 7, and the gas boiler 4 provides heat for the biogas reformer 3 and the methanol synthesizer 7.

[0030] In this embodiment, the biogas is biomass biogas.

[0031] In this embodiment, the gas boiler 4 can use the source raw biogas as the gas source, that is, the source biogas is divided into two paths, one path enters the biogas compressor 2, and the other path enters the gas boiler 4.

[0032] Of course, the gas boiler 4 can also be replaced by other types of boilers, such as an oil boiler.

[0033] In this embodiment, it also includes: an insulated container 1; a biogas compressor 2, a biogas reformer 3, a gas boiler 4, a methanol synthesizer 7, and a condenser 8 are all located in the insulated container 1, which provides better protection for the system installation operation and is conducive to the later maintenance operation of the facilities.

[0034] In this embodiment, a biogas inlet 11 is provided on one side of the insulated container 1, and the biogas inlet 11 is connected to the biogas compressor 2; a methanol outlet 12 is provided on the other side of the insulated container 1, and the methanol outlet 12 is connected to the condensation tank 8 through a methanol pump 10, wherein two methanol pumps 10 are provided so that one is used and the other is reserved.

[0035] In this embodiment, the biogas reformer 3 is provided with a first inlet, a second inlet and a first outlet; the first inlet of the biogas reformer 3 is connected to the biogas compressor 2, the second inlet of the biogas reformer 3 is connected to the gas boiler 4, and the first outlet of the biogas reformer 3 is connected to the methanol synthesizer 7.

[0036] In this embodiment, the first inlet and the second inlet of the biogas reformer 3 are located at both sides of the lower part of the biogas reformer 3 , and the first outlet of the biogas reformer 3 is located at the top of the biogas reformer 3 .

[0037] In this embodiment, the methanol synthesizer 7 is provided with a first inlet, a second inlet and a first outlet; the first inlet of the methanol synthesizer 7 is connected to the biogas reformer 3, the second inlet of the methanol synthesizer 7 is connected to the gas boiler 4, and the first outlet of the methanol synthesizer 7 is connected to the condensation tank 8.

[0038] In this embodiment, the first inlet and the second inlet of the methanol synthesizer 7 are located on the same side of the methanol synthesizer 7 and are distributed up and down, and the first outlet of the methanol synthesizer 7 is located at the top of the methanol synthesizer 7.

[0039] In this embodiment, the gas boiler 4 is provided with a first outlet and a second outlet; the first outlet of the gas boiler 4 is connected to the biogas reformer 3 , and the second outlet of the gas boiler 4 is connected to the methanol synthesizer 7 .

[0040] In this embodiment, the first outlet and the second outlet of the gas boiler 4 are located on both sides of the gas boiler 4 .

[0041] In this embodiment, the condensation tank 8 is provided with a first inlet, a first outlet and a second outlet; the first inlet of the condensation tank 8 is connected to the methanol synthesizer 7, the first outlet of the condensation tank 8 is connected to the methanol pump 10, and the second outlet of the condensation tank 8 is connected to the methanol synthesizer 7.

[0042] In this embodiment, the first inlet and the first outlet of the condensation tank 8 are located at both sides of the lower part of the condensation tank 8 , and the second outlet of the condensation tank 8 is located at the top of the condensation tank 8 .

[0043] In this embodiment, the second outlet of the condensation tank 8 is connected to the pipeline between the biogas reformer 3 and the methanol synthesizer 7 through a reflux pipeline, and the unconverted synthesis gas is recycled to increase the yield.

[0044] In this embodiment, a nickel-based catalyst 5 is disposed in the biogas reformer 3 , and a copper-based catalyst 6 is disposed in the methanol synthesizer 7 .

[0045] In this embodiment, the nickel-based catalyst 5 is Ni / La2O3, and the copper-based catalyst 6 is CuO / ZnO / Cr2O3.

[0046] In this embodiment, a condensing agent 9 is arranged in the condensing tank 8 .

[0047] In this embodiment, the condensing agent 9 is desalted water.

[0048] In this embodiment, the biogas reformer 3 and the methanol synthesizer 7 have the same height; the gas boiler 4 is smaller than the biogas reformer 3 and the methanol synthesizer 7, so as to provide sufficient heat to the biogas reformer 3 and the methanol synthesizer 7; the condensation tank 8 is larger than the biogas reformer 3 and the methanol synthesizer 7, so as to facilitate reflux.

[0049] Working process of this utility model:

[0050] The biomass biogas enters the biogas compressor 2 through the biogas inlet 11, and then the gas boiler 4 is used to increase the temperature of the biogas reformer 3. After reaching the set temperature, the biogas compressed by the biogas compressor 2 is mixed into the biogas reformer 3 containing the nickel-based catalyst 5. After the catalytic reaction, the mixed gas mainly composed of carbon monoxide and hydrogen enters the methanol synthesizer 7. At the same time, the gas boiler 4 provides heat energy for the methanol synthesizer 7, and synthesizes the mixed gas into a mixture containing methanol under the action of the copper-based catalyst 6. The mixture then enters the condensation tank 8, and the methanol is condensed to the bottom of the condensation tank 8 by the action of the condensing agent 9. Finally, the crude methanol is transported to the methanol outlet 12 by the methanol pump 10.

[0051] The methanol production system of the utility model realizes biomass biogas reforming through biogas reformer 3, nickel-based catalyst 5 and temperature increase (gas boiler 4) and pressure increase (biogas compressor 2), and converts it into a mixed gas mainly composed of carbon monoxide and hydrogen, and then realizes mixed gas synthesis through methanol synthesizer 7, copper-based catalyst 6 and temperature increase (gas boiler 4), and converts it into a mixture mainly composed of methanol. The unconverted synthetic gas is then circulated through the reflux pipeline to increase the green methanol yield. The system can realize the high-value utilization of biomass biogas and provide convenient conditions for long-distance transportation of products.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A methanol production system, characterized in that: include: A biogas compressor (2), a biogas reformer (3), a methanol synthesizer (7) and a condensation tank (8) connected in sequence via pipelines; The biogas reformer (3) is used to catalyze the biogas into carbon monoxide and hydrogen; The methanol synthesizer (7) is used to catalytically synthesize carbon monoxide and hydrogen into methanol; A gas boiler (4) is arranged between the biogas reformer (3) and the methanol synthesizer (7), and the gas boiler (4) provides heat for the biogas reformer (3) and the methanol synthesizer (7).

2. The methanol production system according to claim 1, characterized in that: Also includes: A thermal insulation container (1); the biogas compressor (2), the biogas reformer (3), the gas boiler (4), the methanol synthesizer (7), and the condensing tank (8) are all located in the thermal insulation container (1).

3. The methanol production system according to claim 2, characterized in that: A biogas inlet (11) is provided on one side of the thermal insulation container (1), and the biogas inlet (11) is connected to a biogas compressor (2); a methanol outlet (12) is provided on the other side of the thermal insulation container (1), and the methanol outlet (12) is connected to a condensation tank (8) via a methanol pump (10).

4. The methanol production system according to claim 1, characterized in that: The biogas reformer (3) is provided with a first inlet, a second inlet and a first outlet; The first inlet of the biogas reformer (3) is connected to the biogas compressor (2), the second inlet of the biogas reformer (3) is connected to the gas boiler (4), and the first outlet of the biogas reformer (3) is connected to the methanol synthesizer (7).

5. The methanol production system according to claim 1, characterized in that: The methanol synthesizer (7) is provided with a first inlet, a second inlet and a first outlet; The first inlet of the methanol synthesizer (7) is connected to the biogas reformer (3), the second inlet of the methanol synthesizer (7) is connected to the gas boiler (4), and the first outlet of the methanol synthesizer (7) is connected to the condensation tank (8).

6. The methanol production system according to claim 1, characterized in that: The gas boiler (4) is provided with a first outlet and a second outlet; The first outlet of the gas boiler (4) is connected to the biogas reformer (3), and the second outlet of the gas boiler (4) is connected to the methanol synthesizer (7).

7. The methanol production system according to claim 3, characterized in that: The condensation tank (8) is provided with a first inlet, a first outlet and a second outlet; The first inlet of the condensation tank (8) is connected to the methanol synthesizer (7), the first outlet of the condensation tank (8) is connected to the methanol pump (10), and the second outlet of the condensation tank (8) is connected to the methanol synthesizer (7).

8. The methanol production system according to claim 7, characterized in that: The second outlet of the condensation tank (8) is connected to the pipeline between the biogas reformer (3) and the methanol synthesizer (7) through a reflux pipeline.

9. The methanol production system according to any one of claims 1 to 8, characterized in that: The biogas reformer (3) is provided with a nickel-based catalyst (5), and the methanol synthesizer (7) is provided with a copper-based catalyst (6).

10. The methanol production system according to any one of claims 1 to 8, characterized in that: A condensing agent (9) is arranged in the condensing tank (8).

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