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Compressed methane recovery system and recovery method

A recovery system, a technology for methane gas, applied in pipeline systems, container filling methods, container discharge methods, etc., can solve problems such as low recovery efficiency, and achieve the effects of improving efficiency, reducing recovery equipment, and reducing costs

Active Publication Date: 2017-11-03
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is to overcome the problem of low recovery efficiency when recovering and venting methane in the prior art, so as to provide a recovery system and recovery method of compressed methane gas that can not only improve the recovery rate, but also have simple recovery equipment

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  • Compressed methane recovery system and recovery method
  • Compressed methane recovery system and recovery method
  • Compressed methane recovery system and recovery method

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Experimental program
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Effect test

Embodiment 1

[0023] like figure 1 As shown, this embodiment provides a compressed methane gas recovery system, including a heat exchange device 12 for receiving the methane gas and a multi-stage compression device 13 connected to the heat exchange device 12, the heat exchange device 12 The device 12 includes at least two channels, wherein the inlet of the first channel of the heat exchange device 12 is connected to the methane storage tank 11, and the outlet of the first channel of the heat exchange device 12 is connected to the inlet of the first stage compression device 131, so The outlet of the first-stage compression device 131 is connected to the inlet of the second channel of the heat exchange device 12 , and the outlet of the second channel of the heat exchange device 12 is connected to the inlet of the second-stage compression device 132 .

[0024] The above is the core technical solution of the present invention. The compressed methane gas recovery system of the present invention ...

Embodiment 2

[0030] Embodiment two is an improvement made on the basis of embodiment one. In order to improve the system for recovering methane gas, a recovery control device is added to the system of embodiment one. The following details:

[0031] like figure 2 As shown, between the methane storage tank 11 and the heat exchange device 12, a pressure control interlock device 14 for controlling the methane gas in the methane storage tank 11 to enter the heat exchange device 12 and the heat exchange device 12 are provided. A temperature control interlocking device 15 for controlling the opening and closing of the multi-stage compression device 13 is provided between the device 12 and the inlet of the one-stage compression device 131 .

[0032] The pressure control interlock device 14 controls the methane gas in the methane storage tank 11 to flow into the heat exchange device 12, and when the outlet pressure of the methane storage tank 11 is greater than the first preset value, the methane ...

Embodiment 3

[0036] This embodiment provides a recovery system for compressed methane gas. The difference from Embodiment 1 or Embodiment 2 is that the equipment for heat exchange of methane gas is different. The following details:

[0037] like image 3 As shown, the compressed methane gas recovery system includes a mixing device 20 for receiving methane gas and a multi-stage compression device 13 connected to the mixing device 20, wherein the inlet of the mixing device 20 is connected to the methane storage tank 11, the The outlet of the mixing device 20 is connected to the inlet of the first-stage compression device 131, and the outlet of the first-stage compression device 131 is connected to the return port of the mixing device 20 through the second regulating valve 143, and the first-stage The outlet of the compression device 131 is connected to the inlet of the second-stage compression device 132 through a third regulating valve 144 .

[0038] The compressed methane gas recovery sys...

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Abstract

The invention relates to a compressed methane gas recovery system and recovery method. The methane storage tank in the system can be used not only as methane liquid recovery equipment, but also as methane gas output equipment. At the same time, a multi-stage compression device is used to realize compression The recovery of methane gas heats up the original cooling gas by compressing the heated gas, and at the same time cools down the compressed gas, which not only saves the heat exchange of other media, but also improves the recovery efficiency.

Description

technical field [0001] The invention relates to the technical field of gas recovery and reuse, in particular to the recovery of boil-off gas (BOG) applied in the storage and transportation of liquefied natural gas (LNG). Background technique [0002] The main component of liquefied natural gas (LNG) is methane. It is recognized as the cleanest energy source on earth. It is colorless, odorless, non-toxic and non-corrosive. Its volume is about 1 / 625 of the volume of the same amount of gaseous natural gas. The weight of LNG Only about 45% of the same volume of water. Liquefied natural gas is natural gas that becomes liquid after being compressed and cooled to its boiling point. Usually, liquefied natural gas is stored in a low-temperature storage tank at minus 161.5 degrees Celsius and about 0.1 MPa, transported by a special ship or tanker truck, and re-gasified when used. The burning of liquefied natural gas causes very little air pollution and releases a lot of heat, so liqu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C5/06F17C13/00F17D1/08F17D3/01
Inventor 陈峰邢浩
Owner ENN SCI & TECH DEV