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Method and device for processing sour gas rich in carbon dioxide in a claus process

A technology of acid gas and carbon dioxide, applied in chemical instruments and methods, gas treatment, separation methods, etc., can solve the problems of high cost, insufficient high sulfur concentration, etc., and achieve the effect of stable operation guarantee

Inactive Publication Date: 2015-05-20
ТІССЕНКРУПП УДЕ ҐМБГ
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Problems solved by technology

[0007] In particular, if a species with a high carbon dioxide content such as 30-50 vol.-% CO 2 , while low sulfur content such as 0.1-1vol.-%H 2 The process gas of S is to be desulfurized, and the process of acid gas scrubbing to produce an acid gas with a sufficiently high In the case of detergents, the physical or chemical selectivity of such scrubbers is not sufficient to achieve the high sulfur concentrations in the acid gas fraction which are acceptable under these circumstances

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  • Method and device for processing sour gas rich in carbon dioxide in a claus process
  • Method and device for processing sour gas rich in carbon dioxide in a claus process
  • Method and device for processing sour gas rich in carbon dioxide in a claus process

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Embodiment Construction

[0053] figure 1A process flow of the present invention is shown. A sulfur-containing process gas 1a to be treated, for example natural gas, is passed through an absorption column 2, where it comes into contact with an absorption solvent cooled by a heat exchanger 2a. This produces a treated product gas 1b that contains little or no sulfur compounds, most of the carbon dioxide contained in the feed gas 1a also remains in the product gas 1b, and the solvent is loaded with Acid gas3. According to the invention, the loaded solvent is preheated by means of heat exchangers 4 a , 4 b and passed to a regeneration unit designed in the form of a flash vessel 5 . Flashing in the flash vessel 5 produces a carbon dioxide-laden, hydrogen sulphide-depleted acid gas fraction 6 depleted in sulfur compounds, and a carbon dioxide-depleted, sulfur-component-rich laden solvent 7 . It is sent to a regeneration column 8, where, in an exemplary mode, heated by a reboiler 8a, the solvent is heated ...

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Abstract

A process for workup of an industrial carbon dioxide-rich gas to be freed of sulfur components, in which an industrial gas to be freed of sulfur components is purified by a gas scrubbing, and the laden solvent is freed of carbon dioxide and hydrogen sulfide by a regeneration to obtain at least one acid gas fraction having a relatively high content of sulfur components, and the fraction with the highest hydrogen sulfide (H2S) content is supplied to a Claus plant with downstream Claus process gas hydrogenation, and at least one carbon dioxide-laden, low-hydrogen sulfide acid gas fraction from the regeneration device, which has a reduced sulfur content compared to the fraction with the highest hydrogen sulfide (H2S) content, is combined with the hydrogenated Claus process gas to give a combined process gas stream, which is supplied to further processing or to recycling into the process.

Description

technical field [0001] The present invention relates to a method for treating a carbon dioxide-rich acid gas in a Claus process. The invention also relates to a plant for carrying out the process comprising a mixture of flash stage and regeneration column and a Claus burner with a downstream Claus reactor, by means of the regeneration column , to remove carbon dioxide-rich acid gases from absorbents used for gas scrubbing. Background technique [0002] Many process gases, such as natural gas, synthesis gas, refinery gas, or coke oven gas, must be freed of the acid gases contained therein before use, since said substances interfere with further processing. A typical acid gas that hinders further processing and must therefore be separated from the gas to be obtained is hydrogen sulfide (H 2 S), carbonyl sulfide (COS), organic sulfur compounds, ammonia (NH 3 ), or hydrocyanic acid (HCN). These gases have a corrosive effect and are toxic. One method of removing these gases ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14C01B17/04
CPCB01D53/1418B01D53/1425B01D53/1462B01D53/77B01D2257/304B01D2257/306B01D2257/308C01B17/0404C01B17/0408Y02P20/133Y02C20/40Y02P20/151
Inventor J·曼泽尔
Owner ТІССЕНКРУПП УДЕ ҐМБГ
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