Method and device for recycling methane in membrane hydrogen extraction tail gas

A technology for membrane extraction of hydrogen and tail gas, applied in refrigeration and liquefaction, climate sustainability, 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: 2014-07-16
GUIZHOU XINGHUA CHEM
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  • 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.

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  • Method and device for recycling methane in membrane hydrogen extraction tail gas
  • Method and device for recycling methane in membrane hydrogen extraction tail gas
  • Method and device for recycling methane in membrane hydrogen extraction tail gas

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Embodiment Construction

[0037] 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.

[0038] The present invention provides a method and device for recovering methane from membrane hydrogen extraction tail gas, including purification operation, compression operation, liquefaction operation and storage operation; wherein,

[0039] Purification operation is used to operate the raw material gas and transport the purified gas to the liquefaction operation; the purification operation may include a drying tower and a filter; the raw material gas is removed from the H after passing through the drying tower 2 0, enter the liquefaction operation after dust pretreatment through the filter.

[0040] In concrete oper...

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Abstract

The invention discloses a method and a device for recycling methane in membrane hydrogen extraction tail gas. The method includes purification operation, compression operation, liquefaction operation and storage operation. The device comprises a purification unit, a compression unit, a liquefaction unit, a storage unit and a diffusion unit. The purification unit is used for operating virgin gas, and purified gas is delivered to the liquefaction unit; the compression unit is used for carrying out pressurization and cooling operation on nitrogen, and expanded and refrigerated low-temperature gas is delivered to the liquefaction unit; the liquefaction unit is used for receiving the virgin gas from the purification unit and the low-temperature gas from the compression unit; the virgin gas is cooled by the low-temperature gas under the control and then is subjected to separation operation, and separated LNG (liquefied natural gas) is delivered to the storage unit. The method and the device have the advantages that a large quantity of methane in the membrane hydrogen extraction tail gas can be recycled by the aid of the method and the device, so that energy conservation measures of enterprises can be effectively upgraded, resource consumption of the enterprises can be reduced, and an effect of comprehensively utilizing energy of the enterprises can be improved.

Description

technical field [0001] The invention relates to the field of methane recovery technology, in particular to a method and a device for recovering methane from tail gas of membrane hydrogen extraction. 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 a go...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J3/02C07C9/04C07C7/13
CPCY02P20/10
Inventor 翟道兵田维略陈继峰刘宽勇余贵连
Owner GUIZHOU XINGHUA CHEM
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