Process for drying high-pressure natural gas by using temperature-variable pressure-variable closed cyclic regeneration

A variable pressure closed, cyclic regeneration technology, used in the petroleum industry, gas fuel, fuel and other directions, can solve the problems of non-recyclable regeneration gas, waste of resources, etc., to achieve no dew point drift, complete regeneration, and long cooling time. Effect

Inactive Publication Date: 2018-05-18
无锡联合超滤净化设备科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-pressure natural gas dehydration The high-pressure decompression regenerative drying device currently used in the market cannot recycle the regenerative gas, which is a waste of resources

Method used

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  • Process for drying high-pressure natural gas by using temperature-variable pressure-variable closed cyclic regeneration

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Embodiment Construction

[0017] Specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0018] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0019] Such as figure 1 As shown, a high-pressure natural gas drying process with variable temperature and variable pressure closed cycle regeneration, the steps are:

[0020] (1) Pipeline gas replacement: cut off the power supply, slowly open the inlet stop valve F1, pre-filter, precision filter, pre-filter blowdown valve, precision filter blowdown valve, natural gas enters the initial section of the pipeline, and the detection has reached Close the pre-filter drain valve, ...

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Abstract

The invention discloses a process for drying high-pressure natural gas by using temperature-variable pressure-variable closed cyclic regeneration. According to the process, after displacement of pipeline gas, wet natural gas enters a tower A for adsorption; at the same time, a tower B carries out pressure release, desorption of heated gas, water-gas separation and pressure equalization; and then,the working states of the tower A and the tower B are exchanged. The process provided by the invention adopts the principles of pressure swing adsorption, and carries out adsorption at a high pressureand desorption at a low pressure so as to realize pressure-reduced regeneration of an adsorbent, so energy needed in regeneration of the adsorbent is substantially reduced; the regenerated adsorbentis heated so as to increase the regeneration temperature of the adsorbent, so the regeneration of the adsorbent is more thorough, and thus, finished gas with a lower dew point can be obtained; low-pressure low-temperature natural gas separated through cooling is subjected to regeneration and blowing cooling, and blowing cooling gas is cyclically utilized, great in volume, long in blowing cooling time and thorough in blowing cooling effect, so the dew point of the finished gas is prevented from drift; and Pressure-reduced finished gas is used for heating and blowing-cooling gas, so the workingpressure of a fan and a heater is substantially reduced.

Description

Technical field: [0001] The invention belongs to the technical field of gas drying, and in particular relates to a high-pressure natural gas drying process of variable temperature and variable pressure closed cycle regeneration. Background technique: [0002] Energy and the environment are global hot issues today. Natural gas, as a city clean energy, has played an important role in promoting my country's energy conservation, environmental protection, improvement of people's living standards and social and economic development. However, raw gas cannot be used directly, because compressed natural gas may precipitate liquid water. The existence of liquid water will cause serious damage to the safety of automobiles and gas filling stations, such as ice blockage in the system. The presence of hydrates will generate hydrates in the gas storage container, which will also block pipes and valves; the presence of liquid water will strengthen the acidic components (H 2 S, CO 2 ) to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10
CPCC10L3/106
Inventor 李大明孙增辉张美乐
Owner 无锡联合超滤净化设备科技有限公司
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