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Method for producing sulfur, hydrogen and low-sulfur desorption gas from coal gas

A combined method and degassing technology, applied in chemical instruments and methods, hydrogen, hydrogen separation, etc., can solve problems such as unreported, inconvenient, separation, etc.

Inactive Publication Date: 2011-09-07
何巨堂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0025] ② The hydrogen sulfide component is not separated from other non-hydrogen components, and the hydrogen sulfide-containing desorbed gas obtained is difficult to be used separately. The desorbed gas is used as fuel gas or co-fired with high calorific value fuel gas, resulting in increased sulfur emissions. The hydrogen sulfide removal process will greatly increase the investment;
[0026] ③ The hydrogen sulfide component is not separated from other non-hydrogen components. Although the hydrogen sulfide-containing desorption gas obtained contains rich carbon dioxide, it is not convenient to be used as a gas source for the carbon dioxide method for the decomposition of sodium phenate to prepare crude phenol;
[0027] ④ The final conversion method of hydrogen sulfide in the desorbed gas is not indicated
[0029] Method of the present invention has no report

Method used

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  • Method for producing sulfur, hydrogen and low-sulfur desorption gas from coal gas

Examples

Experimental program
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Effect test

Embodiment 1

[0141] The composition of No. 1 raw coal gas (hydrogen sulfide volume concentration 0.1290%) is as shown in Table 1. The hydrogen sulfide removal process adopts the "PDS + tannin extract" method, which is operated under the condition of slightly positive pressure and about 40 ° C. The hydrogen sulfide removal process adopts double towers ( The first dehydrogen sulfide tower and the second dehydrogen sulfide tower) are connected in series, and the hydrogen sulfide volume concentration of purified raw coal gas is controlled to about 300PPm. It is mixed with the top gas of the second hydrogen desulfurization tower through the bypass pipeline to be purified gas for coal exchange. The poor solvent and sulfur foam are obtained in the rich solvent regeneration part, and the sulfur foam is sent to the sulfur melting tank to produce sulfur for sale.

[0142] Since No. 1 raw coal gas contains tar and other impurities, in order to prolong the life of the conversion catalyst and improve t...

Embodiment 2

[0173] The purified gas of raw coal gas is divided into two parts for use. The first part is used to purify the raw coal gas as in Example 1, and the second part to purify the raw coal gas enters the additional mass transfer section. The second part of the upper flowing purified raw gas (the amount is 0.25 times that of the first part of the purified raw gas) completes countercurrent contact and absorbs hydrogen sulfide in the gas and becomes a semi-poor liquid, which enters the top of the first gas-liquid mass transfer section and flows from the bottom The raw raw coal gas flowing upwards becomes a rich solvent after countercurrent contact and absorption of hydrogen sulfide in the gas, and the second part of the purified raw coal gas becomes secondary purified raw coal gas after hydrogen sulfide is removed in the additional mass transfer section (hydrogen sulfide volume concentration is lower than 50PPm ) is discharged from the top of the additional mass transfer section.

Embodiment 3

[0175] The purified raw coal gas produced by the same carbonization device is divided into two parts. The first part of raw coal gas is used in the same manner as in Example 1. The second part of raw coal gas is produced through an independently set hydrogen sulfide removal process. The second part of raw coal gas has a hydrogen sulfide volume concentration of about 35PPm. For desulfurization gas, the second gas-liquid mass transfer section is set using the method of the present invention, and the lean solution of Example 1 enters the top of the second gas-liquid mass transfer section, and the second part of crude gas desulfurization gas flowing from bottom to top (quantity is The first part of raw coal gas (1 times that of raw coal gas) completes countercurrent contact and absorbs hydrogen sulfide in the gas and becomes semi-lean liquid, and the semi-lean liquid enters the top of the first gas-liquid mass transfer section and completes countercurrent contact with the first part...

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Abstract

The invention discloses a method for producing sulfur, hydrogen and low-sulfur desorption gas from coal gas. In the 'PDS+ tanning extract' wet hydrothion removal part, part of the hydrothion is removed from the raw material coal gas obtaining clean coal gas; the volume concentration of the hydrothion in the clean coal gas is controlled in the range required by a process for producing hydrogen by carbon monoxide conversion; the hydrothion adsorbed by the rich solvent is converted to element sulfur at the regeneration part of the solvent, and the poor solvent is recycled; the clean coal gas is taken as the hydrogen production material to be subjected to the process of producing the hydrogen by carbon monoxide conversion, a first pressure swing adsorption part and a second pressure swing adsorption in series to obtain a first desorption gas rich in hydrothion, a high-purity hydrogen and a second desorption gas low in hydrothion; and the first desorption gas is taken as the recycle gas to enter the wet hydrothion removal part for realizing hydrothion removal and sulfur transformation. The method disclosed by the invention belongs to process integration methods, has the advantages of simple process, high operating efficiency and the like and is particularly suitable for processing the raw coke oven gas produced by the carbonizing apparatus.

Description

technical field [0001] The invention relates to a combined method of coal gas sulfur production, hydrogen production, and low-sulfur desorption gas production. The gas "PDS + tannin extract" wet crude dehydrogen sulfide, gas carbon monoxide change, and transformation reaction effluent are separated by two-step pressure swing adsorption , The combination of the first desorption gas cycle dehydrogen sulfide process can improve the operation efficiency of each step at the same time, forming an efficient integrated process. Background technique [0002] As we all know, the process of producing coke by coalification produces coal gas, and the coal gas can be raw coal gas containing a large amount of nitrogen produced by the process of producing semi-coke (semi-coke) by internal heat type (direct heating mode) operation, and the coal gas can also be Coal carbonization gas is produced during the process of producing semi-coke (semi-coke) by external heating (indirect heating method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00C01B3/16C01B3/50C01B3/52C01B3/56C01B17/05C01B31/20C07C39/04C07C37/00C01B32/50
CPCY02E60/328Y02E60/32Y02P20/10
Inventor 何巨堂
Owner 何巨堂