JP2008008388A - High-pressure gas supply method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of reliably supplying high pressure gas via an on-off valve partitioning a high pressure side line from a low-pressure side line from a high-pressure side to a low pressure side in supply facilities which supply the high-pressure gas such as oxygen or oxygen mixed gas to a filling container while securing safety and improving gas supply efficiency by suppressing the sudden temperature rise of the gas due to the previous adiabatic compression of pressure in the low-pressure side line with the supply of the high-pressure gas. <P>SOLUTION: The high-pressure gas is supplied to the low-pressure side pipe via the on-off valve partitioning a high-pressure side pipe from a low-pressure side pipe. In this case, a bypass line via which the high-pressure side pipe and the low-pressure side pipe are connected to each other over the on-off valve partitioning the high-pressure side pipe from the low-pressure side pipe and which has the on-off valve and a pressure rise control means on the upstream and/or downstream side of the on-off valve is used for controlling pressure in the low-pressure side pipe, or liquefied gas in a liquefied gas storage tank is gasified or heated, as it is, and supplied to the low-pressure side pipe on the downstream side of the on-off valve partitioning the high-pressure side pipe from the low-pressure side pipe to control the pressure in the low-pressure side pipe. Then, the high-pressure gas is introduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a supply container for supplying a high-pressure gas such as oxygen or an oxygen mixed gas to a filling container, from a high-pressure side line to a filling container at the end of the low-pressure side line via an on-off valve that partitions the high-pressure side line and the low-pressure side line. The present invention relates to a method for supplying high-pressure gas to be supplied and filled.

Generally, in a factory filled with oxygen or oxygen mixed gas, after the pressure of the liquefied gas in the liquefied gas storage tank is increased by a compressor, the high-pressure gas vaporized by the evaporator is provided with a plurality of valves such as on-off valves. A method of filling a filling container such as an oxygen cylinder to a required pressure by a line is adopted. When supplying the high-pressure gas from the high-pressure side line to the low-pressure side line via these valves, the on-off valve (primary on-off valve) that separates the high-pressure side line from the low-pressure side line is closed. When the high pressure gas is supplied after being released from the state, when the gas pressure on the upstream side of the primary on-off valve is high and the gas pressure on the downstream side of the primary on-off valve is low, the gas rapidly increases due to the differential pressure of the gas pressure. When the secondary valves such as the pressure regulating valve and the on-off valve installed on the downstream side are closed, the gas temperature is increased due to adiabatic compression that occurs in the valve parts. There is a risk that the member may be rapidly raised and a member made of an organic material such as a gasket or a diaphragm of the secondary valve may deteriorate.
The members made of these organic materials are provided to prevent gas leakage or adjust the gas flow rate. There is a possibility of causing a trouble that it cannot be reliably supplied to the filling container.

  In addition, in the case of combustion-supporting high-pressure gas such as oxygen or oxygen mixed gas, organic materials such as gaskets and diaphragms may spontaneously ignite due to a sudden rise in gas temperature accompanying the adiabatic compression, resulting in a fire accident. In addition, there is a danger of causing an explosion due to ignition accompanying rapid temperature rise.

  Therefore, in a facility for supplying a combustion-supporting high-pressure gas such as oxygen or an oxygen mixed gas, the primary on-off valve that partitions the high-pressure side line and the low-pressure side line is opened from the closed state, and the high-pressure gas is supplied to the low-pressure side line. At this time, it is important to suppress a rapid increase in gas temperature accompanying adiabatic compression of the low-pressure line internal pressure.

  High-pressure oxygen, high-pressure gas containing oxygen, or high-pressure flammable gas such as hydrogen or acetylene Hazardous high-pressure gas that prevents the risk of spontaneous ignition that occurs when high-pressure gas is supplied to the supply pipe As a supply method, for example, in Patent Document 1, a high-pressure inert gas is supplied into a supply pipe before supplying a high-pressure gas, and then a high-pressure gas is supplied. A method for preventing ignition by replacing dangerous high pressure gas with inert high pressure gas is disclosed.

Japanese Patent No. 3462099

  However, the method disclosed in Patent Document 1 described above replaces a dangerous high-pressure gas with an inert gas to prevent ignition, and supplies and fills a filling container with a high-pressure gas such as oxygen or an oxygen mixed gas. In this case, the method cannot be applied to the case where an inert gas is mixed in the high-pressure gas to be filled and high-purity oxygen or an oxygen mixed gas is easily filled in a gas cylinder or the like.

  The present invention provides a high pressure side line and a low pressure side line in a supply facility for supplying a high pressure gas such as oxygen or an oxygen mixed gas to a filling container without using an inert gas as disclosed in Patent Document 1. When supplying high-pressure gas from the high-pressure side to the low-pressure side via the on-off valve that divides the pressure, the internal pressure of the low-pressure side is increased in advance, and a sudden increase in gas temperature due to adiabatic compression accompanying the introduction of high-pressure gas is suppressed to ensure safety. It is intended to provide a method of ensuring high performance and increasing gas supply efficiency to reliably supply high-pressure gas.

That is, the present invention
(1) In a supply facility for supplying high-pressure gas to a filling container, high-pressure gas is supplied to the low-pressure side line through an on-off valve that partitions a high-pressure side line through which the high-pressure gas flows and a low-pressure side line connected to the filling container. In this case, after increasing the internal pressure of the low-pressure side line in advance, the high-pressure gas supply method characterized in that the high-pressure gas is supplied by opening the on-off valve,

(2) Connecting the high-pressure side line and the low-pressure side line across the on-off valve, and introducing high-pressure gas into the low-pressure side line via a bypass line provided with flow rate adjusting means and / or internal pressure adjusting means The high-pressure gas supply method according to (1), wherein the low-pressure side line is boosted by

(3) The bypass line provided with the flow rate adjusting means and / or the internal pressure adjusting means is provided with a closing valve for blocking inflow of high pressure gas introduced into the low pressure side line (2) ) High pressure gas supply method,

(4) The high-pressure gas supply method according to (3), wherein the flow rate adjusting means is an orifice or a flow rate adjuster provided on the upstream side and / or downstream side of the closing valve,

(5) The internal pressure adjusting means includes: (a) a pressure regulator provided on the upstream side and / or downstream side of the shut-off valve; or (b) a low-pressure side line internal pressure detecting means and a shut-off valve interlocked with the detecting means. The high-pressure gas supply method according to (3), which is a combination with an operating mechanism,

(6) The bypass line is provided with the flow rate adjusting means according to claim 4 and the internal pressure adjusting means according to (a) or (b) according to claim 5. ) High-pressure gas supply method,

(7) The liquid phase gas derived from the liquefied gas storage tank filled with the liquefied gas used as the high pressure gas is vaporized, and the vapor pressure gas is supplied to the low pressure side line to increase the pressure of the low pressure side line. The high-pressure gas supply method according to (1) above,

(8) Deriving a gas phase gas present in a liquefied gas storage tank filled with a liquefied gas used as the high pressure gas, heating the gas phase gas, and supplying the gas phase gas to the low pressure side line. The high-pressure gas supply method according to (1) above,

(9) The high-pressure gas supply method according to any one of (1) to (8), wherein the low-pressure side line internal pressure is at least 0.3 MPa or more,

(10) The high-pressure gas supply method according to any one of (1) to (9), wherein the high-pressure gas is oxygen or an oxygen mixed gas,
Is a summary.

According to the present invention, in the supply facility for supplying high pressure gas such as oxygen or oxygen mixed gas to the filling container, high pressure gas is supplied to the low pressure side line via the on-off valve that partitions the high pressure side line and the low pressure side line. Deterioration of organic materials provided in valves such as pressure control valves and on-off valves provided on the low-pressure side line, since a sudden increase in gas temperature due to adiabatic compression accompanying the inflow of high-pressure gas can be suppressed Can be suppressed, and ignition can be prevented.
Therefore, according to the present invention, high-pressure gas such as oxygen or oxygen mixed gas can be supplied and filled into the filling container with certainty, ensuring safety and improving gas supply efficiency.

  The method of the present invention will be described in detail with reference to the drawings. Hereinafter, when simply referred to as “high pressure gas”, oxygen or an oxygen mixed gas is indicated unless otherwise specified. Further, the “high pressure side line” may be simply referred to as “high pressure side”, and the “low pressure side line” may be simply referred to as “low pressure side”.

FIG. 1 shows an example of an outline of a filling system in a supply facility for supplying and filling high-pressure gas such as oxygen or oxygen mixed gas, which has been conventionally performed, into a filling container.
The liquefied gas in the liquefied gas storage tank 1 is pressurized by the compressor 2, and the high-pressure gas gasified by the evaporator 3 passes through various valves 10 and 20 such as on-off valves provided in the supply lines 11 and 12. It is supplied to the filling container 4 and filled with a predetermined gas pressure.

  In FIG. 1, when the on-off valve 10 is closed and the downstream line 12 of the on-off valve 10 is at atmospheric pressure and the on-off valve 20 is in a closed state, when the on-off valve 10 is opened, the high pressure gas is turned on. 10 rapidly flows into the downstream line 12 and the gas temperature due to adiabatic compression suddenly rises at the position of the on-off valve 20 disposed at the end of the downstream line 12 (filling part to the filling container), and opens and closes. There is a risk that the organic materials of the constituent members used in the gasket, the pressure adjusting diaphragm, etc. provided in the valve 20 are deteriorated or fire is caused with a rapid rise in gas temperature.

Particularly in large facilities such as oxygen filling factories, the gas flow handled is large, and the diameter of the supply pipe is large, so in the main pipe, the downstream line internal pressure after the primary on-off valve shown by the on-off valve 10 as described above. When the primary on-off valve that separates the high-pressure side and the low-pressure side is opened and a large amount of high-pressure gas is suddenly introduced into the downstream line, the gas temperature rises due to adiabatic compression. As a result, the risk of causing deterioration or ignition of the organic material of the gasket or pressure adjusting diaphragm increases.
Therefore, it is important to suppress and prevent deterioration and ignition of the organic material of the gasket and the pressure adjusting diaphragm with such a rapid increase in gas temperature.

  In the present invention, when the high-pressure gas is supplied from the high-pressure side to the low-pressure side through an on-off valve that partitions the high-pressure side and the low-pressure side, the gas temperature in the low-pressure side line due to adiabatic compression that occurs with the introduction of the high-pressure gas is controlled. In order to suppress a sudden rise and prevent ignition etc., the low-pressure line internal pressure is increased in advance to a pressure sufficient to suppress a sudden rise in gas temperature due to adiabatic compression, and the high pressure side and the low pressure side are Open the partition valve and introduce high-pressure gas.

FIG. 2 shows an example of a method for increasing the internal pressure of the low-pressure side line in the present invention.
In the method shown in FIG. 2, the high pressure side line 11 and the low pressure side line 12 are connected by a bypass line 110 provided across the on-off valve, and the internal pressure of the low pressure side line is reduced via the bypass line. The pressure is increased to a pressure sufficient to suppress an abrupt increase in gas temperature due to adiabatic compression accompanying inflow, and when the pressure is increased to a required pressure, the on-off valve 10 is opened and high pressure gas is supplied to the low pressure side line.

  The bypass line is provided with a flow rate adjusting means for adjusting the flow rate of the high pressure gas or an internal pressure adjusting means for adjusting the pressure in the low pressure side line, thereby increasing the low pressure side line internal pressure. Furthermore, a shut-off valve can be provided in the bypass line so that the gas flowing through the bypass line can be appropriately shut off. Note that both the flow rate adjusting means and the internal pressure adjusting means may be provided in the bypass line. In addition to the bypass line, the above-mentioned stop valve is provided on the high-pressure side (upstream side of the bypass line branching portion) of the main pipe constituting the high-pressure side line and the low-pressure side line through which the high-pressure gas flows. It may be provided on both lines.

An example of an embodiment in which the bypass line is provided to increase the low-pressure line internal pressure is shown in FIGS. 2 (1) and 2 (2). 2 (1) and 2 (2), the gas flow direction is indicated by an arrow. Here, the bypass line in the present invention is generally configured by a pipe having an inner diameter smaller than the inner diameter of the main pipe constituting the high-pressure side line and the low-pressure side line.
FIG. 2 (1) is a partial explanatory view showing a mode in which a flow rate adjusting means such as an orifice or a flow rate adjuster is provided downstream of the bypass line closing valve 100 to increase the low pressure side line internal pressure. The orifice may be provided on the upstream side of the closing valve.
In FIG. 2 (1), when the flow rate of the high pressure gas is adjusted by the orifice 201 provided in the bypass line 110, the high pressure gas is introduced into the low pressure side line, and the low pressure side line internal pressure is increased to a required pressure. Then, the shutoff valve 100 of the bypass line 110 is closed, the on-off valve 10 that partitions the high pressure side and the low pressure side is opened, and high pressure gas is supplied to the low pressure side. For this reason, even if the closing valve 100 is opened rapidly, the low-pressure side line internal pressure can be gradually increased.
The flow rate adjusting means can be supplied by adjusting the flow rate of the gas using a commercially available flow rate regulator such as a needle valve instead of the orifice to increase the low pressure side line pressure. Further, by appropriately selecting or adjusting the opening diameter of the orifice and the needle depth of the needle valve, the pressure increase speed in the low pressure side line can be adjusted.
In FIG. 2 (1), since the high pressure gas is supplied through the flow rate adjusting means provided in the bypass line, the internal pressure of the low pressure side line is gently increased. The opening timing of the on-off valve 10 can be easily achieved.

FIG. 2 (2) shows a pressure regulator 202 for adjusting the high-pressure gas pressure introduced to the upstream side of the closing valve 100 of the bypass line, for example, an internal pressure adjusting means such as a so-called commercially available pressure regulating valve such as a pressure valve. It is a partial explanatory view showing a mode of raising the side line internal pressure. The internal pressure adjusting means may be provided on the downstream side of the stop valve.
In FIG. 2B, the pressure in the low pressure side line is boosted by the pressure regulator 202 provided in the bypass line 110. When the low-pressure line internal pressure is increased to the required pressure, the bypass line closing valve is closed. Thereafter, by opening the on-off valve 10 at an arbitrary timing, the high pressure gas is supplied to the low pressure side.

  In the case of using the internal pressure adjusting means, (a) when the pressure is increased to a required pressure by a so-called pressure regulator such as a commercially available pressure regulating valve provided upstream or downstream of the closing valve, the high pressure gas is introduced. Configure to stop. Or (b) a low pressure side line internal pressure detecting means such as a commercially available pressure sensor and a closing valve operating mechanism such as an electromagnetic valve that operates in conjunction with the detecting means, and the low pressure side line internal pressure detecting means When the pressure is increased to a required pressure, the shutoff valve 100 can be closed to stop the introduction of the high pressure gas.

  When the bypass line is provided and the low-pressure line internal pressure is increased to the required pressure, the shut-off valve 100 is closed, the on-off valve 10 is opened, and high-pressure gas is introduced into the low-pressure line. Although the closing of the closing valve and the opening of the opening / closing valve may be performed manually, it is preferable that the operations are industrially performed in conjunction with each other. Specifically, for example, the high pressure gas is gradually introduced into the low pressure side line by the flow rate adjusting means, and the low pressure side line internal pressure detecting means is used to detect the low pressure side line internal pressure by using the internal pressure adjusting means together. When the pressure is increased, the closing valve 100 is closed by a closing valve operating mechanism such as an electromagnetic valve that operates in response to a signal from the low-pressure side line internal pressure detecting means.

  FIG. 3 shows the bypass line 110 having the orifice 201 and the shut-off valve 100 shown in FIG. 2 (1) connected to the high-pressure side line 11 and the low-pressure side line 12 across the on-off valve 10. This is an example of an embodiment in which the flow rate of the high-pressure gas is adjusted and supplied through the orifice 201 of the line, and the low-pressure line internal pressure is increased to a required pressure. In this embodiment, the pressure of the high-pressure gas is adjusted and supplied to the low-pressure side as a bypass line having a pressure regulator 202 (see FIG. 2B) in place of the orifice or in series with the orifice 201. In addition, the low-pressure line internal pressure can be increased to a required pressure.

  In the embodiment shown in FIG. 3, the internal pressure of the low pressure side line is increased by using the liquid phase gas derived from the liquefied gas storage tank 1 with the on-off valve 10 separating the high pressure side line 11 and the low pressure side line 12 closed. The high pressure gas increased to a predetermined pressure at 2 and vaporized by the evaporator 3 is introduced into the bypass line 110 branched from the line 11 and the gas flow rate is adjusted through the open shut valve 100 and the orifice 201. The low pressure side line 12 is supplied to increase the low pressure side line internal pressure, and when the required pressure is reached, the bypass line closing valve 100 is closed and the on-off valve 10 is opened to supply the high pressure gas to the low pressure side line. Then, the filling container 4 is filled to a predetermined filling pressure via the on-off valve 20.

  In FIG. 3, the low pressure side line internal pressure detecting means 203 such as a pressure sensor provided in the line 12 detects the low pressure side line internal pressure, and when the required pressure is reached, the signal transmitted from the internal pressure detecting means 203 is received. The closing valve 100 is closed by a combination of a closing valve operating mechanism such as an electromagnetic valve that operates and a flow rate adjusting means such as the orifice 201. The signal transmission path from the detection means 203 is indicated by a broken line.

In order to increase the internal pressure of the low pressure side line to a required pressure in advance in the present invention, for example, the open / close valve that partitions the high pressure side line and the low pressure side line is not fully opened at one time, for example, the open / close valve is slightly opened and the high pressure gas is Can be introduced to the low pressure side, and the internal pressure of the low pressure side line can be increased to 0.3 to 0.8 MPa, and then the on-off valve can be fully opened to introduce the high pressure gas.
In addition, when the supply pipe to the filling container is divided into a plurality of branches, a bypass line having the same configuration as shown in FIG. 2 is provided in each of the on-off valves provided in the plurality of supply pipes. It is also possible to adjust the gas pressure to the filling container and the gas flow rate.

  Next, in the present invention, examples of another embodiment for increasing the internal pressure of the low-pressure side line without providing the bypass line are shown in FIGS.

  In the embodiment shown in FIG. 4, the liquid phase gas led to the line 13 through the valve 301 from the liquefied gas storage tank 1 filled with the liquefied gas used as the high pressure gas is vaporized by the evaporator 31 via the line 13. Then, this vaporized gas is introduced into the downstream side of the on-off valve 10 through the line 13 through the valve 30 to increase the low-pressure side line internal pressure. When the internal pressure of the low-pressure side line is increased to the required pressure, the valve 30 is closed, the on-off valve 10 is opened, high-pressure gas is introduced into the low-pressure side line, and the required pressure is applied to the filling container via the on-off valve 20. Fill.

  In another embodiment shown in FIG. 5, the gas phase gas existing in the liquefied gas storage tank 1 filled with the liquefied gas used as the high pressure gas is led out to the line 14 via the valve 301, and this is heated. And is introduced into the downstream side of the on-off valve 10 through the line 14 through the valve 30 to increase the low-pressure side line internal pressure. When the low-pressure line internal pressure is increased to the required pressure, the valve 30 is closed, the on-off valve 10 is opened, high-pressure gas is introduced to the low-pressure side, and the filling container is charged to the required pressure via the on-off valve 20. To do.

  In the embodiment shown in FIG. 4 and FIG. 5 as well, although not shown, the low pressure side line 12 is provided with an internal pressure detecting means such as a commercially available pressure sensor, and when the low pressure side line internal pressure reaches a required pressure, the valve An on-off valve operating mechanism may be provided so that the closing of 30 and the opening of the on-off valve 10 operate in conjunction with each other, whereby high pressure gas is supplied to the low pressure side line. By doing so, the valve 30 can be automatically closed and the on-off valve 10 can be automatically opened.

The pressure of the high-pressure gas handled in the high-pressure gas filling equipment such as oxygen or oxygen mixed gas according to the present invention is generally in the range of 10 MPa to 25 MPa, although it depends on the required filling pressure.
When filling the above-mentioned oxygen or oxygen mixed gas into the filling container, what is the pressure on the low-pressure side line enough to suppress a sudden increase in gas temperature due to adiabatic compression caused by the supplied high-pressure gas? We examined whether it was possible to suppress ignition even when high-pressure gas was introduced. FIG. 6 shows the relationship between the high-pressure gas pressure to be supplied and the ignition frequency when the low-pressure side internal pressure is set to 0.1 MPa, 0.3 MPa, and 0.6 MPa using a test apparatus. The above 0.1 MPa shows the ignition frequency at atmospheric pressure as a reference example.
The graph shown in FIG. 6 shows that the open / close valve that partitions the high pressure side and the low pressure side by the test device is 0.3 sec. In this case, the ignition frequency of the organic material gasket (PCTFE; polychlorotrifluoroethylene) provided at the end of the pipe is examined. (Note that the firing frequency is expressed as a ratio when 25 tests were performed and fired)

  As shown in FIG. 6, for example, when the high pressure gas pressure to be supplied is 15 MPa, the occurrence of ignition is suppressed even if the high pressure gas of 15 MPa is supplied if the low pressure side line internal pressure is increased to at least 0.3 MPa or more. can do. It can also be seen that when the supply high-pressure gas pressure is 20 MPa, the occurrence of ignition can be suppressed even if a high-pressure gas of 20 MPa is supplied if the low-pressure line internal pressure is increased to 0.6 MPa.

  When the pressure of the supplied high pressure gas is higher, the low pressure side line internal pressure is increased correspondingly. For example, when the supply high-pressure gas pressure is 25 MPa, it is possible to suppress the occurrence of ignition if the low-pressure side line internal pressure is increased to about 0.8 MPa.

  Generally, in the oxygen or oxygen mixed gas filling equipment according to the present invention, the oxygen or oxygen mixed gas to be handled is usually in the range of 10 MPa to 25 MPa as described above. Therefore, in this case, the pressure on the low pressure side is at least If the pressure is higher than 0.3 MPa, an abrupt increase in gas temperature due to adiabatic compression can be suppressed.

In the present invention, as a means for increasing the pressure of the low-pressure side line, when the pressure is increased by providing a bypass line, the high-pressure gas is introduced into the low-pressure side if the internal pressure of the low-pressure side line is increased to at least about 0.3 MPa. However, it is possible to suppress ignition and the like.
The upper limit of the low-pressure line internal pressure is not particularly limited, but setting it to a high pressure is not preferable because it takes a long time to increase the pressure to a desired pressure, and practically, the upper limit is preferably about 2.0 MPa. .

On the other hand, as shown in FIG. 4 or FIG. 5, even when the bypass line is not arranged, the internal pressure of the low pressure side line is increased by the vaporized gas obtained by evaporating the liquid phase gas or the gas phase gas extracted from the liquefied gas storage tank. The pressure is increased to the range of 0.3 MPa to 0.8 MPa, which is the pressure of the vaporized gas or gas phase gas, and adiabatic compression can be suitably suppressed. In addition, when the pressure of said vaporization gas or gaseous-phase gas is less than said pressure, it is still more preferable if it is said pressure with a compressor separately in the line 13 or 14. FIG.
In addition, when the pressure inside the low-pressure side line to be increased is not sufficient to suppress the increase in gas temperature due to adiabatic compression with respect to the supplied high-pressure gas pressure, If the supply speed is controlled and gently supplied, ignition can be suppressed.

  According to the method of the present invention, in a filling facility for filling a filling container with a combustion-supporting high-pressure gas such as oxygen or an oxygen mixed gas, the high-pressure gas is supplied to the low-pressure side via the on-off valve that partitions the high-pressure side line and the low-pressure side line. When supplying to the line, it is possible to suppress a sudden rise in gas temperature due to adiabatic compression that occurs with the introduction of high-pressure gas, and to suppress deterioration of organic materials provided in pressure regulating valves, on-off valves, etc. Therefore, the present invention is capable of supplying and filling high-pressure oxygen and a high-pressure oxygen mixed gas into a filling container safely and reliably, and is industrially significant. .

1 shows a schematic diagram of a general filling system of a filling facility for filling a filling container with oxygen or an oxygen mixed gas. The partial explanatory view which provided the flow volume adjustment means or the internal pressure adjustment means in the bypass line in the present invention is shown. 2 (1) is an example in which a flow rate adjusting means is provided, and 2 (2) is an example in which an internal pressure adjusting means is provided. An embodiment in which a bypass line in the present invention is provided to increase the low-pressure line internal pressure is shown. The other embodiment which raises the low pressure side line internal pressure in this invention is shown. 4 shows another embodiment of increasing the low-pressure line internal pressure in the present invention. The graph which shows an example of the supply high-pressure gas pressure and the ignition frequency by the low-pressure side line internal pressure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquefied gas storage tank 2 Compressor 3, 31 Evaporator 4 Filling container 5 Heater 10, 20, On-off valve 11 High-pressure side line 12 Low-pressure side line 110 Bypass line 100 Shut-off valve 201 Orifice 202 Pressure regulator 203 Internal pressure detection means

Claims (10)

  When supplying high-pressure gas to a low-pressure side line through an on-off valve that partitions a high-pressure side line through which the high-pressure gas flows and a low-pressure side line connected to the filling container in a supply facility for supplying high-pressure gas to the filling container, A method for supplying high-pressure gas, wherein after increasing the internal pressure of the side line in advance, the on-off valve is opened to supply high-pressure gas.   The high pressure side line and the low pressure side line are connected across the on-off valve, and the low pressure gas is introduced into the low pressure side line through a bypass line provided with flow rate adjusting means and / or internal pressure adjusting means. 2. The high-pressure gas supply method according to claim 1, wherein the side line is boosted.   The bypass line provided with the flow rate adjusting means and / or the internal pressure adjusting means is provided with a closing valve for blocking the inflow of high pressure gas introduced into the low pressure side line. High pressure gas supply method.   The high-pressure gas supply method according to claim 3, wherein the flow rate adjusting means is an orifice or a flow rate adjuster provided on the upstream side and / or downstream side of the shut-off valve.   The internal pressure adjusting means includes: (a) a pressure regulator provided on the upstream side and / or downstream side of the closing valve; or (b) a low pressure side line internal pressure detecting means and a closing valve operating mechanism linked to the detecting means. The high-pressure gas supply method according to claim 3, wherein the high-pressure gas supply method is a combination.   The bypass line is provided with both the flow rate adjusting means according to claim 4 and the internal pressure adjusting means according to (a) or (b) according to claim 5. The high-pressure gas supply method described.   The liquid phase gas derived from the liquefied gas storage tank filled with the liquefied gas used as the high pressure gas is vaporized, and the vapor pressure gas is supplied to the low pressure side line to boost the low pressure side line. The high-pressure gas supply method according to claim 1.   Deriving the gas phase gas existing in the liquefied gas storage tank filled with the liquefied gas used as the high pressure gas, heating the gas phase gas and supplying the gas phase gas to the low pressure side line, thereby boosting the low pressure side line. The high-pressure gas supply method according to claim 1, wherein the high-pressure gas supply method is performed.   The high-pressure gas supply method according to any one of claims 1 to 8, wherein the low-pressure side line internal pressure is at least 0.3 MPa or more.   The high-pressure gas supply method according to claim 1, wherein the high-pressure gas is oxygen or an oxygen mixed gas.

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