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Device for preparing liquefied natural gas by recovery of tail gas

A technology for recovery of liquefied natural gas and tail gas, which is applied in refrigeration and liquefaction, liquefaction, lighting and heating equipment, etc., to achieve the effect of improving energy saving measures, reducing resource consumption, and improving comprehensive energy utilization

Inactive Publication Date: 2018-07-10
JIANGSU REFRIGERATION & LIQUEFACTION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, there is no good recovery treatment for the membrane hydrogen extraction tail gas, especially for the methane recovery operation in the membrane hydrogen extraction tail gas.

Method used

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  • Device for preparing liquefied natural gas by recovery of tail gas

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0017] The present invention provides a device for recovering and preparing liquefied natural gas from tail gas, including raw material gas purification operation, refrigeration compression operation, liquefaction operation, LNG storage operation, and release operation; wherein,

[0018] Raw material gas purification operation is used to purify the raw material gas and transport the purified gas to the liquefaction unit for liquefaction operation;

[0019] Refrigeration and compression operation, which is used to carry out pressurization and cooling operation of nitrogen, and transport the low-temperature gas after expans...

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Abstract

The invention discloses a device for preparing liquefied natural gas by recovery of tail gas. The device comprises a raw material gas purifying unit, a refrigeration and compression unit, a liquefyingunit, a LNG storage unit and a scattering unit; the raw material gas purifying unit is used for purifying raw material gas and conveying the purified gas to the liquefying unit for liquefication; therefrigeration and compression unit is used for performing supercharged cooling operation on nitrogen and conveying low-temperature gas refrigerated through expansion to the liquefying unit; the liquefying unit is used for receiving the purified raw material gas and the compressed low-temperature gas; the raw material gas is controlled to separate after cooling by the low-temperature gas; and separated LNG is conveyed for storage. The device can recover and prepare the liquefied natural gas in the tail gas, can effectively improve energy saving measures of enterprises, reduces the resource consumption of the enterprises, and improves the energy comprehensive utilization of the enterprises.

Description

technical field [0001] The invention relates to the technical field of recovering liquefied natural gas and methane, in particular to a device for recovering tail gas and preparing liquefied natural gas. Background technique [0002] At present, with the continuous improvement of people's material living standards, the use of energy is also different from previous years. Therefore, many regions are now vigorously advocating energy conservation and consumption reduction, reducing energy loss, and increasing energy utilization efficiency. It can better benefit the future generations of mankind, and it also actively responds to the country's guiding ideology on sustainable development. Atmospheric methane concentrations have more than doubled over the years, mainly due to human activity, surveys show. Methane is 23 times more capable of preventing heat from escaping from the atmosphere than carbon dioxide. Therefore, reducing methane emissions and recovering methane in time is...

Claims

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Application Information

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IPC IPC(8): F25J1/02
CPCF25J1/0072F25J1/0204
Inventor 樊军
Owner JIANGSU REFRIGERATION & LIQUEFACTION EQUIP CO LTD
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