Method and device for producing gas products
A technology of equipment and gas mixture, which is applied in the field of obtaining gas products and equipment, and can solve problems such as discarding
Active Publication Date: 2017-05-03
LINDE AG
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Problems solved by technology
The third method is particularly disadvantageous if the carbon dioxide product should be obtained in high yields, since almost all the carbon dioxide contained in the sulfur-free methanol used to rewash the sulfur-containing components in the enrichment column Exhaust is discarded
Method used
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[0028] The raw synthesis gas to be separated is supplied via line 1 to the lower region of scrubber A, which is designed as an absorption column. The scrubber A, which typically operates at a pressure between 15 and 75 bar, has a lower scrubber section S1 and an upper scrubber section S2 which are separated from each other by a tray K1. The raw synthesis gas is guided upwards in the scrubber A, in this case in intensive contact with cold methanol which is introduced in the unloaded state via the line 2 into the scrubbing section S2, in order to wash out the carbon dioxide. The scrubbing agent, which has been preloaded with carbon dioxide, is carried on via lines 3 and 4 and throttling device a into scrubbing section S1, where it mainly absorbs sulfur-containing components from the raw synthesis gas 1 and is then loaded with The state of carbon dioxide and sulfur-containing components is discharged from the bottom space of scrubber A. Synthesis gas 6 consisting essentially of...
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The invention relates to a method for operating a wet gas scrubbing unit as well as to a wet gas scrubbing unit in which substances of a first type and substances of a second type are separated from a gas mixture (1) by a wet scrubbing process by means of a physically active scrubbing agent (2) in which the substances of the second type are more readily soluble than the substances of the first type, and a first (12) scrubbing agent (10), which is loaded with substances of the first type and contains hardly any substances of the second type, and a second scrubbing agent (10), which is loaded with substances of the first and second types, are obtained; during regeneration of the scrubbing agents (10), the second loaded scrubbing agent (10) for separating substances of the first type is released into a first column (M) so as to reduce its pressure a first pressure and is then released into a second column (E) so as to reduce its pressure to a lower second pressure; in the first column (M), a first portion (11) of the first loaded scrubbing agent (12, 14) is used for backwashing substances of the second type, and in the second column (E), a second portion (15) of the first loaded scrubbing agent (12, 14) is used for backwashing substances of the second type converted into the gas phase during the pressure reduction; before being used in the second column (E), the second portion (15) of the first loaded scrubbing agent (12) is expanded in a separator (D3) so as to obtain a liquid phase which has a lower concentration of substances of the first type and which is transferred into the second column (E) with the aid of gravity. The method of the invention is characterized in that an apparatus that can be operated independently of the first column (M) and the second column (E) is used as the separator (D3) in which the pressure of the second portion (15) of the first loaded scrubbing agent (12) is reduced to a third pressure which is higher or lower than the first pressure.
Description
technical field [0001] The invention relates to a method for operating a gas scrubber in which a first and a second substance are separated from a gas mixture by scrubbing with a physically acting scrubbing agent, wherein the second substance is easier than the first substance dissolved in the detergent to obtain a first detergent loaded with the first substance and substantially free of the second substance and a second detergent loaded with the first and second substances, during regeneration thereof for separation Depressurization of a second load of detergent to a first pressure into a first column followed by depressurization to a second lower pressure into a second column where the first load is used in the first column The first part of the detergent and the second part of the first load of detergent are used in the second column to re-wash the second material, which is transferred to the gas phase at the time of depressurization, wherein the second part of the first lo...
Claims
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IPC IPC(8): B01D53/14C10K1/08
CPCB01D53/1406C10K1/004C10K1/005C10K1/08B01D53/1425B01D2252/2021B01D2256/16B01D2256/20B01D2257/30B01D2257/504
Inventor A·T·德兰U·凯赖斯泰乔戈鲁A·布兰德尔
Owner LINDE AG