阅读说明：本技术 气体生产系统 (Gas production system ) 是由 广濑健二 富田伸二 于 2018-05-18 设计创作，主要内容包括：一种气体生产系统,该气体生产系统能够连续供应通过对气源进行精馏而获得的作为产物气体的液化气体,其具有较高热效率、不使用如泵等具有污染风险的机器。一种气体生产装置(100),包括：单个压力装置(30),该单个压力装置具有单个加压容器(31)、压力管线以及第二热交换单元(32),从精馏单元中提取的液化气体被供应到该单个加压容器,该压力管线用于提取和蒸发该加压容器(31)中的一部分液化气体并且使该部分液化气体返回到该加压容器(31),该第二热交换单元布置在该压力管线中；以及液化气体存储单元(41),该液化气体存储单元存储从该加压容器(31)中导出的液化气体。(A gas production system capable of continuously supplying a liquefied gas obtained by rectifying a gas source as a product gas with high thermal efficiency without using a machine having a risk of contamination such as a pump. A gas production apparatus (100) comprising: a single pressure device (30) having a single pressurized vessel (31) to which the liquefied gas extracted from the rectification unit is supplied, a pressure line for extracting and evaporating a portion of the liquefied gas in the pressurized vessel (31) and returning the portion of the liquefied gas to the pressurized vessel (31), and a second heat exchange unit (32) arranged in the pressure line; and a liquefied gas storage means (41) that stores the liquefied gas derived from the pressurized container (31).)

1. A gas production system comprising a first heat exchange unit (13) cooling an externally taken gas source (L1), and a rectification unit having one or two or more rectification columns (20, 21, 22) for obtaining liquefied gas by rectifying a liquefied gas source obtained by cooling in the first heat exchange unit, the rectification column comprising:

-a single pressure device having a single pressurized vessel (31) to which the liquefied gas extracted from the rectification unit is supplied, a pressure line (L5L) for extracting and evaporating a portion of the liquefied gas in the pressurized vessel and returning the portion of liquefied gas to the pressurized vessel, and a second heat exchange unit (32) arranged in the pressure line;

-a liquefied gas storage unit (41) storing liquefied gas (L6) derived from a pressurized container of the pressure device; and

-a product gas extraction line (L7) for increasing the temperature and supplying liquefied gas as product gas by passing liquefied gas from the liquefied gas storage unit through the first heat exchange unit for heat exchange with the gas source.

2. The gas production system of claim 1, comprising:

-a gas source supply line (L1) supplying a gas source to the rectification unit (20, 21) via the first heat exchange unit (13);

-an air supply flow rate measuring unit (11) of the air supply line, mounted on the upstream side of the first heat exchange unit;

-a first control valve (12) mounted upstream of the gas source supply line and controlling the supply amount of the gas source based on the flow rate measured by the gas source flow rate measurement unit;

-a product gas measurement unit (51) of the product gas extraction line, which is installed on the downstream side of the first heat exchange unit and measures a value related to the product gas; and

-a second control valve (52) installed in the product gas extraction line and controlling the amount of extraction of the product gas based on the result measured by the product gas measurement unit.

3. The gas production system according to claim 1 or 2, further comprising:

-a recycle gas source compressor (153) of the rectification column which compresses an exhaust gas (recycle gas source) (R1) extracted from an upper part of the rectification column (20) preferably located at the most upstream side (top) in the rectification column;

-an expansion turbine (151) including an oil pressure brake, the expansion turbine expanding exhaust gas (R3) extracted from an upper column portion of the rectifying column located on the most upstream side or exhaust gas extracted from a position different from the extraction position of the exhaust gas; and

-a control unit (60) controlling the refrigeration supplied to the first heat exchanger according to the variation of the product gas extraction.

4. The gas production system of claim 3, further comprising: a first condenser (213) disposed in an upper column portion of the rectifying column on the most upstream side, and a second condenser (214) provided at a lower position in the vicinity of the first condensing unit,

-wherein the recycle gas source compressor compresses the exhaust gas (recycle gas source) (R1) extracted from a specific location of the first condenser, and

-an expansion turbine (151) comprising the oil brake (152) expands the exhaust gas (R3) extracted from a specific location of the second condenser.

5. The gas production system of claim 3, further comprising: a single condenser (213) arranged in an upper column part of the rectifying column (20, 21) on the most upstream side,

-wherein the recycle gas source compressor (153) compresses the off-gas (51) extracted from a specific location of the condenser, and

-an expansion turbine (151) comprising the oil brake (152) expands the exhaust gas extracted from a specific location of the condenser.

6. The gas production system according to claim 1 or 2, further comprising: an introduction line (L9) which introduces liquid nitrogen or liquid oxygen in the upper column part of the rectification column (20, 21).

7. The gas production system according to any one of claims 1 to 6, comprising: a liquefied gas source buffer for storing the liquefied gas source, the liquefied gas source buffer being located in a subsequent stage of the first heat exchange unit (13).

8. The gas production system according to any one of claims 3 to 5, wherein the control unit calculates a degree of coldness recovered in the first heat exchange unit (13) from the flow rate of the product gas measured in the product gas flow rate measurement unit (51), and controls an expansion turbine (151) including the oil pressure brake (152) based on the calculated degree of coldness.

9. Gas production system according to claim 8, wherein the control unit controls the flow rate of the expansion turbine (151) or controls the load on the oil brake (152) depending on the coldness.

10. The gas production system according to any one of claims 1 to 9, comprising:

-a branch line (R13, L71) branching off at the previous stage of the first heat exchange unit of the product gas extraction line;

-a gate valve (53) installed in the branch line and switching the feeding of the liquefied gas into the branch line and/or the product gas withdrawal line;

-an extraction control unit (50) controlling the gate valve to feed the liquefied gas into the branch line and/or the product gas extraction line; and

-a third heat exchange unit (55) arranged in the branch line.