Method And Apparatus For Providing Over-Pressure Protection For An Underground Storage Cavern
a technology of underground storage and overpressure protection, which is applied in the direction of conveyor parts, check valves, fluid pressure measurement, etc., can solve the problems of large capital expenditure and compromise of overall safety, and achieve the effect of reducing the size of the vent or flare stack associated with the pressure relief valv
Inactive Publication Date: 2015-11-12
AIR LIQUIDE LARGE INDS U S LP
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- Description
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Benefits of technology
The invention relates to a method of reducing the pressure of gas in an underground storage cavern, which involves using a set of isolation valves and a pressure relief valve. The method can help to reduce the size of the vent or flare stack associated with the pressure relief valve without compromising safety. The technical effect of this invention is to provide a more efficient and safe way of reducing the pressure of gas in underground storage caverns.
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[0025]While the invention will be described in connection with several embodiments, it will be understood that it is not intended to limit the invention to those embodiments. On the contrary, it is intended to cover all the alternatives, modifications and equivalence as may be included within the spirit and scope of the invention defined by the appended claims.
[0026]High pressure gases, including, but not limited to: nitrogen, air, carbon dioxide, hydrogen, helium, and argon, can be stored in caverns, whether leached in salt formations or created by hard rock mining. Additionally, the pressure of these gases exiting the cavern can be at very high pressures (e.g., 100-200 atmospheres), which can cause safety issues for downstream equipment and the mechanical integrity of the pipeline.
[0027]Now turning to the FIGURE. The gas is withdrawn from pipeline 2 via line 4 and compressed in compressor 5 to a pressure that is sufficiently high enough such that the gas can be removed from underg...
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Abstract
A method and apparatus is provided which will provide over-pressure protection for an underground storage cavern by reducing the pressure of a pressurized gas stream originating from the an underground storage cavern to form a lower pressure gas stream, monitoring the pressure of a lower pressure gas stream and stopping the flow of the lower pressure gas stream to the pipeline should the pressure of the lower pressure gas stream exceed a threshold value.
Description
TECHNICAL FIELD OF THE INVENTION[0001]The present invention relates to a method and apparatus for improving the operational safety in handling a pressurized gas originating from an underground storage cavern.BACKGROUND OF THE INVENTION[0002]It is known to store hydrogen, as well as other gases in salt caverns. These large storage sites help to provide a buffer in the event when customer demand exceeds normal production capacity or if production capacity is reduced below normal levels. For various reasons, the pressures within these large salt caverns can be very high, sometimes greatly exceeding the pressure of the pipeline to which the gas will be subsequently introduced. One method of controlling the pressure of the gas is to use a pressure control device, which is configured to safely reduce the pressure of the gas before it is introduced to the pipeline. However, if this device were to fail, the overall safety would be compromised. A solution known heretofore has been to include...
Claims
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Login to View More IPC IPC(8): B65G53/66B65G53/30B03C1/02B65G43/08F17D5/00B01D53/26B65G5/00B65G53/58
CPCB65G53/66B65G5/00B65G53/30B65G53/58Y10T137/7842F17D5/00B01D53/261B03C1/02B03C2201/20B65G43/08F17C1/007F17C7/00F17C2205/0326F17C2205/0332F17C2205/0338F17C2205/0341F17C2221/012F17C2221/013F17C2221/014F17C2221/016F17C2221/017F17C2221/031F17C2223/0123F17C2223/035F17C2223/036F17C2225/0123F17C2225/035F17C2250/043F17C2250/0443F17C2250/0657F17C2270/0152Y10T137/7837Y02E60/32G01L7/00F16K15/00B01D46/0036B01D46/0034
Inventor JAMES, PHILLIP
Owner AIR LIQUIDE LARGE INDS U S LP