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Novel mercury removal method for renewable natural gas

A technology of natural gas and a new method, applied in the field of mercury removal from renewable natural gas, can solve problems such as narrow application range, expensive mercury removal agent, heavy economic burden of natural gas production, etc.

Pending Publication Date: 2019-12-13
河北石兴科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned mercury removal methods have obvious defects, which are mainly reflected in: (1) The mercury removal agent used in the non-renewable natural gas mercury removal method is expensive, and the subsequent disposal cost of the used mercury removal agent is high, which brings heavy costs to natural gas production. Economic burden; (2) Renewable natural gas mercury removal methods can usually only be used in conjunction with molecular sieve dehydration, and the application range is narrow, and the mercury vapor generated during molecular sieve regeneration needs to be treated with non-renewable mercury removal agents, which is difficult to reduce mercury removal cost

Method used

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Examples

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Effect test

Embodiment 1

[0021] Example 1: Single-tower renewable mercury removal method

[0022] The single-tower renewable mercury removal method means that the number of natural gas mercury removal towers is one. as attached figure 1 As shown, the left side of the dotted line is the mercury removal tower, which is filled with a renewable mercury removal agent, and the right side is the mercury removal agent regeneration device. The regeneration device is mainly composed of an air cooler, a refrigerator, a gas-liquid separator, a liquid mercury storage tank, and a circulation Composed of air pump and heater. During mercury removal in the mercury removal tower, valve 1 and valve 2 are opened, valve 3 and valve 4 are closed, and the regeneration device does not work. During the regeneration of mercury removal agent, valve 1 and valve 2 are closed, valve 3 and valve 4 are opened, and the regeneration device works. After the regenerated mercury removal agent is cooled to room temperature, the mercury...

Embodiment 2

[0024] Example 2: Two-tower renewable mercury removal method

[0025] The double-tower renewable mercury removal method means that the natural gas mercury removal tower and the mercury removal agent regeneration device are fixed in the production process of the natural gas natural gas treatment plant, and the number of mercury removal towers is two. as attached figure 2 As shown, the left side of the dotted line is the mercury removal tower, which is filled with a renewable mercury removal agent, and the right side is the mercury removal agent regeneration device. The regeneration device is mainly composed of an air cooler, a refrigerator, a gas-liquid separator, a liquid mercury storage tank, and a circulation Composed of air pump and heater. The difference from embodiment 1 is that since this embodiment has two mercury removal towers, they can be used simultaneously or separately, and the regeneration of the mercury removal agent can be regenerated simultaneously or separa...

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Abstract

The invention discloses a novel mercury removal method for renewable natural gas, belonging to the field of natural gas purification. According to the invention, a renewable mercury removal agent is adopted and loaded into a mercury removal tower, and then natural gas is introduced into the mercury removal tower so as to realize mercury removal of the natural gas; when the mercury content of the natural gas at the outlet of the mercury removal tower is close to a control standard, the mercury removal agent is heated and regenerated; mercury vapor generated during regeneration is cooled so as to realize the recovery of liquid mercury; and the regenerated mercury removal agent can be subjected to mercury removal treatment of natural gas again after cooling. The method not only can effectively reduce the mercury removal cost of the natural gas, but also can realize recovery and utilization of mercury resources.

Description

technical field [0001] The invention belongs to the field of natural gas purification, and in particular relates to a new method for demercuration of renewable natural gas. The mercury removal agent can be regenerated by heating. Background technique [0002] There are two main methods for removing mercury from natural gas, one is low-temperature separation method, and the other is mercury removal agent adsorption method. According to the type of mercury removal agent, the adsorption method of mercury removal agent can be divided into two categories, namely non-renewable natural gas mercury removal method and renewable natural gas mercury removal method. The mercury removal agents used in non-renewable natural gas mercury removal methods are usually sulfur-loaded activated carbon or metal sulfide mercury removal agents, which are difficult to regenerate after use and are usually treated as dangerous goods. The mercury removal agent used in the renewable natural gas mercury ...

Claims

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Application Information

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IPC IPC(8): B01D53/02C10L3/10
CPCB01D53/02C10L3/101B01D2253/116B01D2253/1124B01D2253/106B01D2257/602
Inventor 不公告发明人
Owner 河北石兴科技有限公司
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