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Residual gas recovery process

A technology of residual gas and technology, which is applied in the field of recovery and reuse of vehicle-mounted residual natural gas, can solve the problems of waste of resources, unfavorable environmental protection, etc., and achieve the effects of saving energy, benefiting environmental protection, and reducing manpower

Active Publication Date: 2016-04-27
XINJIANG XINJIE FUEL GAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, the loss of the part of natural gas that is vented before the existing trailer inspection is considerable, but it is not conducive to environmental protection and causes waste of resources

Method used

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  • Residual gas recovery process

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Embodiment Construction

[0008] A residual gas recovery process, such as figure 1 As shown, including the residual gas recovery device used in this process, the residual gas recovery device includes an unloading hose 3, an inflation hose 4, a charging / unloading column 5, a residual gas venting valve F1, a residual gas recovery valve F2, Empty pipeline, residual gas recovery tank 6, residual gas discharge valve F5, inlet valve F3, gas outlet valve F4, natural gas compressor 7, first safety valve A1 and second safety valve A2; The unloading column 5 is connected to the inflation hose 4, the unloading hose 3 or both the unloading hose 3 and the inflation hose 4 are connected to the residual air release valve F1, the first safety valve A1 and the first safety valve A1 through the charging / unloading column 5 The residual gas recovery valve F2, the residual gas venting valve F1 and the first safety valve A1 are connected to the venting pipeline at the same time, the residual gas recovery valve F2 is connect...

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Abstract

The invention discloses a residual gas recovery technology. When the internal pressure of a gas tank carried by a trailer from which gas is to be discharged is greater than the internal pressure of a gas tank carried by a trailer for receiving residual gas, the residual gas in the gas tank carried by the trailer from which gas is to be discharged is directly charged into the gas tank carried by the trailer for receiving residual gas through pressure difference, without using a natural gas compressor, and the natural gas compressor correspondingly connected with a gas inlet communicating pipe of the natural gas compressor and a gas outlet communicating pipe of the natural gas compressor is always at a stop state; when the internal pressure of the gas tank carried by the trailer from which gas is to be discharged is smaller than or equal to the internal pressure of the gas tank carried by the trailer for receiving residual gas, the residual gas in the gas tank carried by the trailer from which gas is to be discharged is compressed through the natural gas compressor and then is forcedly pressed into the gas tank carried by the trailer for receiving residual gas. The technology not only is beneficial to environmental protection, but also protects the environment from being damaged, can save energy, sufficiently recycles and utilizes natural gas discharged to the atmosphere originally, improves the economic benefit, and further reduces manpower cost, material cost and power consumption for residual gas recovery.

Description

technical field [0001] The invention belongs to a method for recovering and reusing vehicle-mounted residual natural gas, in particular to a process for recovering residual gas. Background technique [0002] At present, according to national regulations, natural gas long tube trailers need to be tested regularly. The conventional method is to directly vent the remaining natural gas in the tube bundle trailer to be tested, and the tube bundle trailer can enter the various testing procedures after nitrogen replacement. The tank return pressure of the tube bundle trailer of the gas filling station after unloading (the internal pressure of the trailer pulled back to the parent station after unloading is called the return tank pressure) is generally around 3-5MPa. Calculated according to the tube bundle trailer with a water volume of 18 cubic meters and the tank return pressure of 3MPa, the natural volume of air vented is nearly 540 standard cubic meters; the tube bundle trailer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C7/00F17C13/02
Inventor 张德均许克军方海平
Owner XINJIANG XINJIE FUEL GAS
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