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Regeneration method ans device for detergent supported in physical gas washing

A gas scrubbing and detergent technology, which is applied in the direction of liquid scrubbing gas purification, separation methods, chemical instruments and methods, etc., can solve the problems of unreachable, troublesome boundary values, etc., and achieve the effect of simple and more economical treatment

Inactive Publication Date: 2008-08-06
LINDE AG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when the synthesis gas to be purified has a low sulfur content, as is the case for example with synthesis gas produced from sulfur-depleted coal, this limit value can only be reached with great difficulty (for example by using an increased stripping gas quantity cold stripping) or not at all

Method used

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  • Regeneration method ans device for detergent supported in physical gas washing

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Embodiment Construction

[0027] This example concerns part of the regeneration of scrubbers in physical gas scrubbing in which carbon dioxide (CO 2 ) and sulfide-contaminated syngas in a scrubber with cold methanol scrubber. Nitrogen is used as stripping gas in the enrichment column and thermal stripper.

[0028] The loaded methanol scrubbing agent is introduced into the upper section of the enrichment tower A through the pipeline 1, and in this section, the methanol scrubbing agent is Part of the amount of carbon dioxide contained in is stripped off. By the time it reaches the bottom K of the flue, the temperature of the methanol scrubber has dropped to such an extent that it is practically impossible to strip CO to a greater extent 2 . Thus, the loaded methanol scrubbing agent is withdrawn from the enrichment column A via line 3, fed to a heat exchanger (not shown) and scrubbed there with regenerated methanol flowing to the scrubber column (not shown). Agent indirect heat exchange heating. The ...

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Abstract

The invention relates to a method for the regeneration of scrubbing agents in physical gas scrubbing and a device for carrying out the method, wherein the Predominantly the first species is separated out of the loaded detergent and mainly the second species is separated by subsequent thermal regeneration in a thermal regeneration column (H). The loaded detergent (6) is withdrawn from the enrichment column (A) after cold stripping, heated (E1), depressurized and then in a device for carrying out thermal stripping (hot stripper (W)) A thermal stripping is carried out in which the content of the first type of substances in the loaded detergent is further reduced.

Description

technical field [0001] The invention relates to a method for the regeneration of scrubbing agents in physical gas scrubbing and a device for carrying out the method, in which method, by stripping (low temperature stripping) from Predominantly the first species is separated from the loaded detergent and mainly the second species is separated by subsequent thermal regeneration in a thermal regeneration column. Background technique [0002] Physical gas scrubbing exploits the property of liquids to absorb gaseous substances and keep them dissolved without compounding with them. How well a liquid absorbs a gas is expressed by the solubility coefficient: the better a gas dissolves in a liquid, the greater its solubility coefficient. The solubility coefficient is temperature dependent and generally increases with decreasing temperature. [0003] The loaded scrubber is subsequently regenerated after gas scrubbing by removing the scrubbed-out gas components dissolved in the scrubb...

Claims

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Application Information

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IPC IPC(8): B01D3/00B01D3/38B01D53/14C10K1/08
CPCB01D53/1425
Inventor U·凯赖斯泰乔格卢U·普吕斯纳H·魏斯
Owner LINDE AG