Absorbent and method for removing acidic gases in waste gas

An acid gas and absorbent technology, which is applied in the field of waste gas treatment agents and its treatment, can solve the problems of reduced adsorption efficiency of absorbents, corrosion of absorption equipment, increased manufacturing costs, etc. less effect

Inactive Publication Date: 2015-03-25
WUXI EPIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there is oxygen, especially in high temperature environment, the organic amine salt solution is very easy to oxidize and decompose. The oxidatively decomposed organic amine salt solution will, on the one hand, greatly reduce or invalidate the adsorption efficiency of the absorbent; The absorption equipment causes corrosion, which greatly reduces the service life of the equipment and increases the manufacturing cost of the enterprise in disguise.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The absorbent is an organic amine salt solution with additives, the added additive is strontium isopropoxide, and the addition of strontium propoxide makes the prepared absorbent insensitive to oxygen, so that the organic amine salt solution has good oxygen resistance and is not easy to Oxidative decomposition occurs, so that the absorption efficiency of the absorbent is high, the absorption rate is above 99%, and the absorption is stable; in addition, the equipment is not easy to corrode. In addition, strontium isopropoxide can also enhance the absorption of carbon dioxide in the acid waste gas by the absorbent.

[0033] Above-mentioned absorbent is made by following steps:

[0034] Step 1: Mix N-aminoethylpiperazine with water and stir evenly, add activated aluminum oxide as a catalyst, heat, and control the temperature at 350-400°C; then, cool down to 120-130°C, under stirring Ethylene oxide is added for reaction; the molar ratio of N-aminoethylpiperazine, ethyle...

Embodiment 2

[0041] The absorbent is an organic amine salt solution with additives, the added additive is strontium isopropoxide, and the addition of strontium propoxide makes the prepared absorbent insensitive to oxygen, so that the organic amine salt solution has good oxygen resistance and is not easy to Oxidative decomposition occurs, so that the absorption efficiency of the absorbent is high, the absorption rate is above 99%, and the absorption is stable; in addition, the equipment is not easy to corrode. In addition, strontium isopropoxide can also enhance the absorption of carbon dioxide in the acid waste gas by the absorbent.

[0042] Above-mentioned absorbent is made by following steps:

[0043] Step 1: Mix N-aminoethylpiperazine with water and stir evenly, add activated aluminum oxide as a catalyst, heat, and control the temperature at 350-400°C; then, cool down to 120-130°C, under stirring Ethylene oxide is added for reaction; the molar ratio of N-aminoethylpiperazine, ethyle...

Embodiment 3

[0048] The absorbent is an organic amine salt solution with additives, the added additive is strontium isopropoxide, and the addition of strontium propoxide makes the prepared absorbent insensitive to oxygen, so that the organic amine salt solution has good oxygen resistance and is not easy to Oxidative decomposition occurs, so that the absorption efficiency of the absorbent is high, the absorption rate is above 99%, and the absorption is stable; in addition, the equipment is not easy to corrode. In addition, strontium isopropoxide can also enhance the absorption of carbon dioxide in the acid waste gas by the absorbent.

[0049] Above-mentioned absorbent is made by following steps:

[0050] Step 1: Mix N-aminoethylpiperazine with water and stir evenly, add activated aluminum oxide as a catalyst, heat, and control the temperature at 350-400°C; then, cool down to 120-130°C, under stirring Ethylene oxide is added for reaction; the molar ratio of N-aminoethylpiperazine, ethyle...

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PUM

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Abstract

The invention discloses an absorbent and a method for removing acidic gas in waste gas. The absorbent is an organic amine salt aqueous solution added with an additive, and the additive is isopropanol strontium. The absorbent is prepared according to the following steps: step 1. heating in the presence of active aluminum oxide as the catalyst at the temperature of 350-400 DEG C; then cooling to 120-130 DEG C, and reacting by adding epoxy ethane in mixing state; step 2. reacting the reactant obtained from step 1 and vanadic acid to obtain an organic amine salt; and step 3.dissolving the organic amine salt obtained from step 2 in water, then uniformly mixing after isopropanol strontium is added to prepare the organic amine salt aqueous solution which is the absorbent. According to the method for removing acidic gas in waste gas, the absorbent thoroughly, reversely contacts waste gas in an absorption tower to obtain the saturated absorbent; then the saturated absorbent is subjected to distilling or extraction to recover the useful components in the absorbent, the residual solution after recovery is used as an absorbent solution for reuse, so that the absorbent is recyclable.

Description

technical field [0001] The invention relates to a waste gas treatment agent and a treatment method thereof, in particular to an absorbent and a removal method for removing acid gas in waste gas. Background technique [0002] Sulfur dioxide is an important way of sulfur emission, one of the main gases of air pollution, and the source of acid rain. With the increasing requirements of environmental protection on the emission of air pollutants, in the flue gas desulfurization purification, how to reasonably select the desulfurization process, with low investment and operating costs, to achieve the emission of sulfur dioxide after flue gas desulfurization in line with the national emission standards, It is a key issue for the healthy development of flue gas desulfurization in coal-fired power plants and metallurgical industries. Therefore, the development of various high-performance sulfur dioxide absorbents is one of the research topics in this field. [0003] In flue gas desu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/50
Inventor 尤为
Owner WUXI EPIC TECH
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