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Method and system for separating hydrogen sulfide in industrial tail gas

A technology of industrial tail gas and separation method, which is applied in the direction of separation method, chemical instrument and method, and separation of dispersed particles, which can solve the problems of high operating cost, environmental pollution by waste, production of by-products or waste, etc., and achieve economic benefits Good, process green and environmental protection effect

Pending Publication Date: 2021-06-04
TRIUMPH PHOTOVOLTAIC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of the above two methods are: after the hydrogen sulfide in the industrial tail gas is absorbed or oxidized, by-products or wastes will be produced, and the by-products need to be treated twice, and the wastes have environmental pollution problems, and their reprocessing There is a problem of high operating cost in the process

Method used

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  • Method and system for separating hydrogen sulfide in industrial tail gas

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Comparison scheme
Effect test

Embodiment 1

[0022] refer to figure 1 , a hydrogen sulfide separation system in industrial tail gas, including a primary cooling unit 10, a secondary cooling unit 20, a gas-liquid separator 30, a liquid storage unit 40 and an absorption unit 50.

[0023] The primary cooling unit 10 is used for preliminary cooling of industrial tail gas, including a first tail gas inlet 11 and a first tail gas outlet 12 , a first cold source inlet 13 and a first cold source outlet 14 . Specifically, the primary cooling unit 10 can be a tube-and-tube heat exchanger, so that the first exhaust gas inlet 11 and the first exhaust gas outlet 12 can communicate with the tube side of the tube-and-tube heat exchanger, and the first cold source inlet 13 and The outlet 14 of the first cold source can communicate with and communicate with the shell side of the shell-and-tube heat exchanger, so that the first cold source and industrial exhaust gas can exchange heat in the shell-and-tube heat exchanger.

[0024] The sec...

Embodiment 2

[0031] A method for separating hydrogen sulfide in industrial tail gas, comprising the steps of:

[0032] (1) Using the circulating water as the cooling source, the industrial tail gas is cooled by the primary cooling unit 10 to obtain the primary cooling tail gas with a temperature of 0° C. to 10° C., and enter the secondary cooling unit 20;

[0033] (2) Using liquid nitrogen as a cooling source, the secondary cooling unit 20 is used to perform secondary cooling on the primary cooling tail gas to obtain cryogenic tail gas at a temperature of -80°C to -75°C, and enter the gas-liquid separator 30;

[0034] (3) Use the gas-liquid separator 30 to perform gas-liquid separation on the cryogenic tail gas, wherein the liquid leads to the liquid storage unit 40, and the gas passes to the secondary cooling unit 20 to be heated to 5-10°C by heat exchange, and then absorbed Unit 50 is discharged after treatment.

[0035] After testing, the hydrogen sulfide content in the liquid storage ...

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Abstract

The invention relates to the technical field of environmental protection, in particular to a separation method and system for hydrogen sulfide in industrial tail gas. The method comprises the following steps: (1) carrying out primary cooling on industrial tail gas to obtain primarily cooled tail gas with the temperature of less than or equal to 10 DEG C; (2) performing secondary cooling on the primarily cooled tail gas to obtain cryogenic tail gas of which the temperature is less than or equal to -75 DEG C; (3) performing gas-liquid separation on the cryogenic tail gas, and collecting liquid, wherein the content of hydrogen sulfide in the industrial tail gas is greater than or equal to 1%, and the boiling point difference between hydrogen sulfide and other substance components in the industrial tail gas is greater than or equal to 20 DEG C. The method can effectively separate hydrogen sulfide from industrial tail gas, and has the advantages of green and environment-friendly process, energy conservation, simplicity, convenience and good economic benefit.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method and system for separating hydrogen sulfide from industrial tail gas. Background technique [0002] The hydrogen sulfide gas in the tail gas emitted by industrial activities not only corrodes equipment and reduces operating conditions, but also causes environmental pollution and environmental protection pressure. At present, the removal methods of hydrogen sulfide are mainly divided into two kinds: adsorption method and oxidation method. The adsorption method uses physical or chemical materials to absorb hydrogen sulfide, so that the hydrogen sulfide in the tail gas is absorbed and recovered by adsorbents or adsorption equipment. Oxidation method refers to the method of oxidizing hydrogen sulfide gas into elemental sulfur or sulfur-containing oxides in gas phase or liquid phase. The shortcomings of the above two methods are: after the hydrogen sulfide i...

Claims

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Application Information

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IPC IPC(8): B01D53/00
CPCB01D53/002B01D2257/304
Inventor 徐根保吴以军李克王昌华王宝玉
Owner TRIUMPH PHOTOVOLTAIC MATERIAL CO LTD