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Compressed methane recovery control system and recovery control method

A technology of control system and control method, which is applied in the direction of container filling method, container discharge method, equipment loaded into pressure vessel, etc., can solve the problems of low recycling efficiency, and achieve the effect of improving recycling efficiency and saving energy consumption

Active Publication Date: 2017-09-19
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 control system and a recovery control system for compressed methane gas that can not only improve the recovery rate, but also have simple recovery equipment. Control Method

Method used

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

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Embodiment 1

[0024] Such as figure 1 As shown, this embodiment provides a compressed methane gas recovery system, including a heat exchange device 11 for receiving the methane gas, the heat exchange device 11 includes at least two channels, and the compressed methane gas recovery system also It includes a multi-stage compression device connected to the heat exchange device 11, wherein the inlet of the first stage compression device 121 is connected to the first channel of the heat exchange device 11 through a pipeline, and the first stage compression device 121 The outlet is connected to the second passage of the heat exchange device 11 through a pipe, and the second passage of the heat exchange device 11 is connected to the inlet of the second stage compression device 122 through a pipe.

[0025] The above is the core technical solution of the present invention. The compressed methane gas recovery system of the present invention includes a heat exchange device 11 for receiving the methane...

Embodiment 2

[0031] Embodiment 2 is an improvement made on the basis of Embodiment 1. In order to improve the system for recovering methane gas, the structure of the multi-stage compression device is improved on the system of Embodiment 1. The following details:

[0032] Such as figure 2 As shown, the multi-stage compression device 12 is multiple compression sections of the same compression device, which may include a first-stage compression device 12A, a second-stage compression device 12B, a third-stage compression device, etc. as required. Compared with the independent compression device in the first embodiment, the occupied area of ​​the equipment in the second embodiment is reduced.

[0033] In this embodiment, the multi-stage compression device 12 is a compression device, the first stage compression device 12A is the first few stages of compression of the compression device, and the second stage compression device 12B is the last few stages of compression of the compression device. ...

Embodiment 3

[0035] Embodiment three is the deformation that makes on the basis of embodiment one or embodiment two, in order to improve the system that reclaims methane gas, on the system of embodiment one or embodiment two, the equipment that recycles has been increased, detailed description below:

[0036] Such as image 3 As shown, in the compressed methane gas recovery system, since the initial low-temperature methane gas enters the first channel of the heat exchange device 11 from the buffer tank 13, there is no Form the heated methane gas, so the temperature of the methane gas flowing out from the first channel of the heat exchange device 11 is still very low, and cannot be directly input into the first-stage compression device 12A, so the first-stage compression device A heat tracing device 14 is provided between the inlet of 12A and the heat exchange device 11, and the heat tracing device 14 is wound on the pipeline between the first stage compression device 12A and the heat excha...

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Abstract

The invention relates to a compressed methane gas recovery control system and a recovery control method. The automatic operation of the system is realized by setting a pressure interlock device and a temperature interlock device. The methane gas enters the pressure control interlock device of the heat exchange device, and the temperature control interlock device for controlling the opening and closing of the multi-stage compression device is set between the heat exchange device and the inlet of the first-stage compression device. The invention realizes intrinsic safety of equipment while reducing labor cost, saves heat exchange of other media, saves energy consumption, and improves 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): F17C5/06F17C13/02F17C13/04
Inventor 陈峰邢浩
Owner ENN SCI & TECH DEV