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Process and device for regenerating the loaded washing agent in a physical gas wash

A technology of gas washing and detergent, applied in the direction of gas treatment, separation methods, chemical instruments and methods, etc., which can solve the problems of a large number of special equipment and operating costs

Inactive Publication Date: 2007-11-14
LINDE AG
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Problems solved by technology

[0010] To prevent HCN from concentrating to a large extent in the methanol scrub, all methanol scrubs used to separate sulfur-containing gases and HCN from raw synthesis gas must be stripped under conditions determined by the solubility coefficient of HCN, therefore, Requires significant specialized equipment and operating costs

Method used

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  • Process and device for regenerating the loaded washing agent in a physical gas wash
  • Process and device for regenerating the loaded washing agent in a physical gas wash

Examples

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Embodiment Construction

[0024] The invention will be explained in more detail below with reference to two exemplary embodiments shown in FIGS. 1 and 2 . Each of the exemplary embodiments relates to a methanol scrubbing in which raw synthesis gas containing water residues is purified from water and hydrogen cyanide (HCN) in a first scrubbing step and from carbon dioxide in a second scrubbing step (CO 2 ) and sulfur-containing gases (H 2 S, COS). A portion of the loaded (or loaded) methanol detergent extracted from the second wash step was used as the detergent in the first wash step. In the two figures, the same device parts are identified with the same symbols.

[0025]The gas stream to be purified is introduced via line 1 into the lower part of scrubber T1 in which it is largely purified of residual water and HCN. A purified gas stream, now mainly comprising hydrogen and carbon monoxide, is withdrawn from the scrubber and sent via line 2 . Liquid methanol is introduced as scrubbing agent via li...

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Abstract

The invention relates to a method for regenerating a loaded detergent (6, 7) from a physical gas scrubbing (T1) process comprises regenerating the detergent removed from a first scrubbing step depending on the remaining amount of loaded detergent to selectively remove the gas components from the raw gas (1). An independent claim is also included for a device for regenerating a loaded detergent from a physical gas scrubbing process comprising a regenerating unit (T2a).

Description

technical field [0001] The present invention relates to a method for regenerating loaded scrubbing agents resulting from physical gas scrubbing in which one or more gas components are largely selectively selected between at least two consecutive scrubbing The first scrubbing step of the steps is removed from the gas mixture to be purified (raw gas). The invention also relates to a device for carrying out the method. Background technique [0002] Physical gas scrubbing (or gas scrubbing) takes advantage of the ability of liquids to absorb gaseous substances and keep them in solution without chemically binding the gas in the process. The degree to which a gas is absorbed by a liquid is expressed by the solubility coefficient: the more a gas dissolves in a liquid, the greater its solubility coefficient. The solubility coefficient is temperature dependent and generally increases with decreasing temperature. [0003] If the gas component i is dissolved from the gas mixture by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D2257/504B01D53/1425B01D53/1406B01D2257/308B01D2257/408B01D2257/304B01D19/0005B01D53/00
Inventor 乌尔里希·普吕斯纳霍斯特·魏斯
Owner LINDE AG
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