Manufacturing system

Abstract

To provide a manufacturing system which can generate a mixed gas containing two kinds of gases while removing a specific gas and use the generated mixed gas to manufacture a product.SOLUTION: A manufacturing system includes: a first gas introduction unit which introduces a first mixed gas containing a first gas and a third gas; a second gas introduction unit which introduces a second mixed gas containing a second gas and the third gas; a first gas concentration unit which generates a first concentration gas, formed by concentrating the first gas, from the first mixed gas introduced into the first gas introduction unit; a second gas concentration unit which generates a second concentration gas, formed by concentrating the second gas, from the second mixed gas introduced into the second gas introduction unit; a mixing unit which mixes the first concentration gas generated by the first gas concentration unit with the second concentration gas generated by the second gas concentration unit to generate a third mixed gas containing the first gas, the second gas, and the third gas; a gas separation unit which separates the third gas from the third mixed gas generated by the mixing unit to generate a manufacturing gas; and a manufacturing unit which uses the manufacturing gas to manufacture a product.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a manufacturing system. [Background technology]

[0002] In recent years, in order to realize a carbon-neutral society, efforts have been made to separate and capture carbon dioxide from exhaust gases emitted from power generation facilities and the atmosphere (hereinafter simply referred to as exhaust gases, etc.), and to produce carbon compounds from the captured carbon dioxide or to cultivate microorganisms using the carbon dioxide (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-159666 Summary of the Invention [Problem to be solved by the invention]

[0004] Microorganisms such as hydrogen bacteria require hydrogen, carbon dioxide, and oxygen for cultivation. Some hydrogen bacteria accumulate biodegradable plastics within their cells under nitrogen-starved conditions. In order to produce biodegradable plastics using such bacteria, it is preferable to generate a mixed gas containing high-purity carbon dioxide and oxygen with a low nitrogen concentration, and use this mixed gas in the production section, from the perspective of efficiently producing biodegradable plastics.

[0005] Therefore, an object of the present invention is to provide a manufacturing system that can generate a mixed gas containing two types of gases while removing a specific gas, and can manufacture products using the generated mixed gas. [Means for solving the problem]

[0006] One aspect of the present invention for solving the above-mentioned problems is a manufacturing system including: a first gas inlet section that introduces a first mixed gas containing a first gas and a third gas; a second gas inlet section that introduces a second mixed gas containing a second gas and a third gas; a first gas concentration section that produces a first concentrated gas by concentrating the first gas from the first mixed gas introduced into the first gas inlet section; a second gas concentration section that produces a second concentrated gas by concentrating the second gas from the second mixed gas introduced into the second gas inlet section; a mixing section that mixes the first concentrated gas produced in the first gas concentration section with the second concentrated gas produced in the second gas concentration section to produce a third mixed gas containing the first gas, the second gas, and the third gas; a gas separation section that separates the third gas from the third mixed gas produced in the mixing section to produce a product gas; and a manufacturing section that produces a product using the product gas.

[0007] According to this aspect, a first concentrated gas obtained by concentrating the first gas in the first gas concentration unit to dilute the concentration of gases other than the first gas and including a third gas is produced, and a second concentrated gas obtained by concentrating the second gas in the second gas concentration unit to dilute the concentration of gases other than the second gas and including the third gas is produced by mixing these in the mixing unit to produce a third mixed gas, and the third gas is separated from the third mixed gas in the gas separation unit. Therefore, a product gas containing a high-purity first gas and a high-purity second gas can be produced while removing the third gas in the gas separation unit, and the produced product gas can be used in the production unit to produce high-quality products.

[0008] In a preferred aspect, the concentration of the first gas in the first concentrated gas produced in the first gas concentration section is different from the concentration of the second gas in the second concentrated gas produced in the second gas concentration section.

[0009] In a preferred aspect, the difference between the concentration of the first gas in the first concentrated gas produced in the first gas concentration section and the concentration of the second gas in the second concentrated gas produced in the second gas concentration section is 1% or more.

[0010] In a preferred aspect, the first gas is carbon dioxide and the second gas is oxygen.

[0011] In a preferred aspect, the third gas is nitrogen.

[0012] In a preferred aspect, the first gas concentrating section concentrates the first gas so that the concentration of the first gas in the first concentrated gas falls within a range of 60% to 98%.

[0013] In a preferred aspect, the second gas concentrating section concentrates the second gas so that the concentration of the second gas in the second concentrated gas falls within a range of 80% to 95%.

[0014] In a preferred aspect, the production unit includes a second gas supply unit that supplies a second gas-containing gas containing a second gas to the production unit.

[0015] According to this aspect, the concentration of the second gas used in the production section can be adjusted.

[0016] The above aspects may be made dependent on each other, or some of the configurations may be quoted or substituted for each other, as long as they are included in the technical scope of the present invention. [Effects of the Invention]

[0017] According to the present invention, a mixed gas containing two types of gases can be generated while removing a specific gas, and a product can be manufactured using the generated mixed gas. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a diagram schematically illustrating a manufacturing system according to a first embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the present invention will be described in detail.

[0020] As shown in FIG. 1, the manufacturing system 1 of the first embodiment of the present invention includes a first gas introduction section 2, a first gas concentration section 3, a second gas introduction section 4, a second gas concentration section 5, a mixing section 6, a gas separation section 7, an electrolysis device 8 (second gas supply section), a manufacturing section 9, and a third gas recovery section 10.

[0021] (First gas introduction part 2) The first gas inlet section 2 is a section for introducing a first mixed gas containing at least a first gas and a third gas from the outside, and is capable of supplying the first mixed gas to the first gas concentrating section 3. The first mixed gas introduced into the first gas introduction section 2 of this embodiment is a mixed gas with a relatively high concentration of carbon dioxide, such as exhaust gas from a coal-fired power plant or the like (for example, a mixed gas with a carbon dioxide concentration of 10% to 15%), and mainly contains carbon dioxide as the first gas, nitrogen as the third gas, and oxygen as the second gas.

[0022] (First gas concentration section 3) The first gas concentrating section 3 is a section that produces a first concentrated gas by concentrating carbon dioxide, which is the first gas, from the first mixed gas, and is capable of supplying the produced first concentrated gas to the mixing section 6. The method for concentrating carbon dioxide in the first gas concentration section 3 is not particularly limited, and for example, chemical absorption, physical absorption, physical adsorption, membrane separation, etc. can be used, and physical adsorption methods such as pressure swing adsorption (hereinafter also referred to as PSA) and thermal swing adsorption (hereinafter also referred to as TSA) are preferred. The first gas concentrating section 3 of this embodiment generates a first concentrated gas by concentrating carbon dioxide from the first mixed gas by the PSA method. It is preferable that the first gas concentrating section 3 concentrates the carbon dioxide so that the concentration of carbon dioxide in the first concentrated gas falls within the range of 60% to 98%, and it is more preferable that the carbon dioxide is concentrated so that the concentration falls within the range of 90% to 98%.

[0023] (Second gas introduction part 4) The second gas inlet section 4 is a section for introducing a second mixed gas containing at least a second gas and a third gas from the outside, and is capable of supplying the second mixed gas to the second gas concentrating section 5. The second mixed gas introduced into the second gas introduction part 4 of this embodiment is atmospheric air, and mainly contains oxygen as the second gas, nitrogen as the third gas, and carbon dioxide as the first gas. Furthermore, the second mixed gas has a lower concentration of carbon dioxide, which is the first gas, than the first mixed gas.

[0024] (Second gas concentrator 5) The second gas concentrating section 5 is a section that produces a second concentrated gas by concentrating oxygen, which is the second gas, from the second mixed gas, and is capable of supplying the produced second concentrated gas to the mixing section 6. The method for concentrating oxygen in the second gas concentration section 5 is not particularly limited, and for example, chemical absorption, physical absorption, physical adsorption, membrane separation, etc. can be used, and physical adsorption methods such as PSA and TSA are preferred. The second gas concentrating section 5 of this embodiment generates a second concentrated gas by concentrating oxygen from the second mixed gas by the PSA method. The second gas concentrating section 5 preferably concentrates oxygen so that the concentration of oxygen in the second concentrated gas falls within the range of 80% to 95%, and more preferably concentrates oxygen so that the concentration falls within the range of 90% to 93%.

[0025] (Mixing section 6) The mixing section 6 is a section that mixes the first concentrated gas produced by the first gas concentration section 3 with the second concentrated gas produced by the second gas concentration section 5 to produce a third mixed gas containing carbon dioxide as the first gas, oxygen as the second gas, and nitrogen as the third gas, and is capable of supplying the third mixed gas to the gas separation section 7. The concentration of the first gas in the first concentrated gas mixed in the mixer 6 and the concentration of the second gas in the second concentrated gas preferably differ, and the difference in concentration is preferably 1% or more. The mixing ratio of the first concentrated gas and the second concentrated gas in the mixing section 6 can be changed as appropriate to suit the production of the product in the production section 9. For example, the mixing section 6 preferably mixes the first concentrated gas so that the second concentrated gas is in a larger amount than the first concentrated gas.

[0026] (Gas Separation Section 7) The gas separation unit 7 is a part that separates a separated gas containing the third gas from the third mixed gas produced by the mixing unit 6, and produces a product gas containing the first gas and the second gas. The gas separation unit 7 is capable of supplying the produced product gas to the production unit 9, and is capable of supplying the separated gas to the third gas recovery unit 10. The gas separation unit 7 of this embodiment separates the separated gas from the third mixed gas by a membrane separation method using a polymer membrane such as polyimide. The separation membrane used in the gas separation section 7 is not particularly limited as long as it can selectively permeate and concentrate nitrogen from the third mixed gas, and for example, a polymer membrane such as polyimide can be used. The concentration of nitrogen as the third gas in the separation gas is preferably 95% or more and 100% or less. The concentration of nitrogen as the third gas in the production gas is preferably 0.2% or less. In this embodiment, the separation gas contains substantially only the third gas, and the production gas contains substantially only the first gas and the second gas. Here, "containing substantially only the third gas" means that the concentration of the third gas in all gases is 97% or more, and "containing substantially only the first gas and the second gas" means that the combined concentration of the first gas and the second gas in all gases is 97% or more.

[0027] (Electrolyzer 8) The electrolysis device 8 is a device that uses an electrochemical reaction to independently generate oxygen as a second gas and hydrogen as a fourth gas from an electrolyte solution such as water. That is, the electrolysis device 8 has a positive electrode portion and a negative electrode portion in an electrolytic cell, and by applying a voltage between the positive electrode portion and the negative electrode portion while the positive electrode portion and the negative electrode portion are immersed in the electrolyte solution, it is possible to generate a second-containing gas containing the second gas and a fourth-containing gas containing the fourth gas on each electrode portion. The electrolysis device 8 is capable of supplying the generated second-containing gas and the generated fourth-containing gas to the production unit 9 via separate systems. That is, the electrolysis device 8 serves as a second gas supply unit that supplies the second-containing gas to the production unit 9, and also serves as a fourth gas supply unit that supplies the fourth-containing gas to the production unit 9. The electrolysis device 8 is provided with a first flow rate adjusting unit that adjusts the amount of the second-containing gas supplied to the production unit 9, and can supply the second-containing gas from the first flow rate adjusting unit to the production unit 9 at a desired flow rate. The electrolysis device 8 also includes a second flow rate adjusting unit that adjusts the amount of the fourth containing gas supplied to the production unit 9, and can supply the fourth containing gas from the second flow rate adjusting unit to the production unit 9 at a desired flow rate. The concentration of the second gas in the second gas-containing gas is preferably 99% or more and 100% or less. The concentration of the fourth gas in the fourth containing gas is preferably 99% or more and 100% or less.

[0028] (Manufacturing Department 9) The production section 9 is a section that produces a product using a production gas containing the first gas and the second gas produced in the gas separation section 7, and a second-containing gas containing the second gas and a fourth-containing gas containing the fourth gas produced in the electrolysis device 8. Specifically, the production section 9 is a section that uses the production gas, the second containing gas, and the fourth containing gas to cultivate chemoautotrophic bacteria that carbon dioxide fixes the first gas, carbon dioxide, and produces raw materials for biodegradable plastics, etc. Examples of chemoautotrophic bacteria that can be used include hydrogen bacteria, methanogens, methane-oxidizing bacteria, nitrate bacteria, nitrite bacteria, sulfur-oxidizing bacteria, iron-oxidizing bacteria, and anammox bacteria. In this embodiment, hydrogen bacteria are used as chemoautotrophic bacteria.

[0029] (Third gas recovery section 10) The third gas recovery section 10 is a section that recovers a separated gas containing the third gas separated in the gas separation section 7. The separated gas recovered in the third gas recovery section 10 can be used for industrial purposes.

[0030] According to the manufacturing system 1 of this embodiment, a first concentrated gas obtained by concentrating the first gas in the first gas concentrating unit 3 to dilute the concentration of gases other than the first gas, including a third gas, and a second concentrated gas obtained by concentrating the second gas in the second gas concentrating unit 5 to dilute the concentration of gases other than the second gas, including the third gas, are mixed in the mixing unit 6 to generate a third mixed gas, and the third gas is separated from the third mixed gas in the gas separation unit 7. Therefore, a product gas containing a high-purity first gas and a high-purity second gas can be generated while removing the third gas in the gas separation unit 7, and the generated product gas can be used in the manufacturing unit 9 to manufacture a high-quality product.

[0031] According to the manufacturing system 1 of this embodiment, the second-containing gas containing the second gas at a desired flow rate can be supplied from the electrolysis device 8 to the manufacturing unit 9. Therefore, the concentration of the second gas used in the manufacturing unit 9 can be adjusted according to the product.

[0032] According to the production system 1 of this embodiment, the first mixed gas introduced from the first gas introduction unit 2 and the second mixed gas introduced from the second gas introduction unit 4 are different gases. Therefore, by using a gas containing a large amount of the first gas as the first mixed gas introduced into the first gas introduction unit 2 and using a gas containing a large amount of the second gas as the second mixed gas introduced into the second gas introduction unit 4, it becomes easier to concentrate the gases in the first gas concentrating unit 3 and the second gas concentrating unit 5.

[0033] According to the manufacturing system 1 of this embodiment, oxygen as the second gas and hydrogen as the fourth gas are supplied to the manufacturing unit 9 as independent gases, and therefore safety is high.

[0034] In the above-described embodiment, biodegradable plastics were produced as products by culturing hydrogen bacteria in the production unit 9, but the present invention is not limited to this. Products other than biodegradable plastics may also be produced in the production unit 9.

[0035] In the above-described embodiment, the first gas is carbon dioxide, the second gas is oxygen, the third gas is nitrogen, and the fourth gas is hydrogen, but the present invention is not limited to this. The first gas, second gas, and fourth gas may be any desired gas as long as they are different gases and can be used in the production unit 9. That is, each gas can be changed appropriately depending on the type of chemoautotrophic bacteria used in the production unit 9. The first gas may be a gas other than carbon dioxide, the second gas may be a gas other than oxygen, the third gas may be a gas other than nitrogen, and the fourth gas may be a gas other than hydrogen.

[0036] In the above-described embodiment, the second containing gas and the fourth containing gas are supplied to the production unit 9 by one electrolysis device 8, but the present invention is not limited to this. The second containing gas and the fourth containing gas may be supplied to the production unit 9 from separate devices.

[0037] In the above-described embodiment, the second-containing gas is supplied from the electrolysis device 8 to the production section 9, but the present invention is not limited to this. If the mixture ratio of the first gas and the second gas in the production gas can be adjusted, the second-containing gas does not need to be supplied from the electrolysis device 8.

[0038] In the above embodiment, hydrogen cells were cultured in the production unit 9, and therefore a fourth gas containing hydrogen was supplied from the electrolysis device 8 as the fourth gas, but the present invention is not limited to this. If a product can be produced in the production unit 9 using the first gas and the second gas, it is not necessary to supply the fourth gas from the electrolysis device 8.

[0039] In the above embodiment, the second-containing gas containing the second gas and the fourth-containing gas containing the fourth gas are generated by the electrolysis device 8 and supplied to the production unit 9, but the present invention is not limited to this. The second-containing gas and / or the fourth-containing gas may be supplied to the production unit 9 from a gas cylinder or the like.

[0040] In the above-described embodiments, each component can be freely substituted or added between the respective embodiments as long as it falls within the technical scope of the present invention. [Explanation of symbols]

[0041] 1. Manufacturing System 2 First gas inlet 3. First gas enrichment section 4 Second gas inlet 5 Second gas enrichment section 6 Mixing section 7 Gas separation section 8 Electrolysis device (second gas supply unit) 9 Manufacturing Department 10. Third gas recovery section

Claims

1. a first gas introduction section that introduces a first mixed gas containing a first gas and a third gas; a second gas inlet for introducing a second mixed gas containing a second gas and a third gas; a first gas concentrating section that generates a first concentrated gas by concentrating the first gas from the first mixed gas introduced into the first gas inlet section; a second gas concentrating section that generates a second concentrated gas by concentrating the second gas from the second mixed gas introduced into the second gas inlet section; a mixing unit that mixes the first concentrated gas produced in the first gas concentrating unit and the second concentrated gas produced in the second gas concentrating unit to produce a third mixed gas containing the first gas, the second gas, and the third gas; a gas separation unit that separates the third gas from the third mixed gas generated in the mixing unit to generate a product gas; A manufacturing system comprising a manufacturing section that manufactures a product using the manufacturing gas.

2. 2. The manufacturing system of claim 1, wherein the concentration of the first gas in the first concentrated gas produced in the first gas concentration section is different from the concentration of the second gas in the second concentrated gas produced in the second gas concentration section.

3. 3. The manufacturing system of claim 2, wherein a difference between the concentration of the first gas in the first concentrated gas produced in the first gas concentration unit and the concentration of the second gas in the second concentrated gas produced in the second gas concentration unit is 1% or more.

4. 4. The manufacturing system according to claim 1, wherein the first gas is carbon dioxide and the second gas is oxygen.

5. The manufacturing system of claim 4 , wherein the third gas is nitrogen.

6. The manufacturing system according to any one of claims 1 to 3, wherein the first gas concentrating unit concentrates the first gas so that the concentration of the first gas in the first concentrated gas falls within a range of 60% to 98%.

7. The manufacturing system according to any one of claims 1 to 3, wherein the second gas concentrating unit concentrates the second gas so that the concentration of the second gas in the second concentrated gas falls within a range of 80% to 95%.

8. 4. The manufacturing system according to claim 1, further comprising a second gas supply unit that supplies a second-containing gas containing a second gas to the manufacturing unit.

Images