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Purification method for industrial emission gas

An exhaust gas and industrial technology, which is applied in the field of purification of industrial exhaust gas, can solve problems such as the inability to effectively absorb carbon dioxide, achieve good social and environmental benefits, reduce alkali content, and achieve good economic benefits

Inactive Publication Date: 2013-06-12
DATANG INT HIGH ALUMINA COAL R & D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to propose a method for purifying industrial exhaust gas to realize the effective absorption of carbon dioxide in industrial exhaust gas in view of the problem that carbon dioxide in industrial exhaust gas cannot be effectively absorbed

Method used

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  • Purification method for industrial emission gas

Examples

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Effect test

Embodiment 1

[0032] figure 1 It is a schematic flow chart of Embodiment 1 of the present invention.

[0033] This example provides a method for purifying industrial exhaust gas. The calcium-silicate slag used is the calcium-silicate slag produced after alumina is extracted from high-alumina fly ash, wherein the mass content of sodium oxide is 2.0%, and the moisture content is 35%. ; The industrial exhaust gas to be purified is the lime rotary kiln gas of Datang Renewable Resources Co., Ltd., and the mass concentration of carbon dioxide gas is 38%. The purification of the industrial exhaust gas is completed in a three-stage series absorption tower (first-stage absorption tower, second-stage absorption tower and third-stage absorption tower), such as figure 1 As shown, it specifically includes the following steps:

[0034] (1) Mix silicon-calcium slag with water to form silicon-calcium slag slurry, heat the silicon-calcium slag slurry to 80°C, in the silicon-calcium slag slurry, the liquid...

Embodiment 2

[0039] The difference from Example 1 is that the mass content of sodium oxide in the silicon-calcium slag used in this example is 1.6%, and the water content is 43%; the industrial exhaust gas to be purified is produced by Inner Mongolia Datang Tuoketuo Power Generation Co., Ltd. Desulfurization flue gas, in which the concentration of carbon dioxide gas is 10%.

[0040] (1) Mix silicon-calcium slag with water to form silicon-calcium slag slurry, heat the silicon-calcium slag slurry to 90°C, and the liquid-solid volume ratio of silicon-calcium slag to water is 8;

[0041] (2) The calcium-silicon slag slurry is sprayed from top to bottom into the first-stage absorption tower at a flow rate of 0.02L / min, and industrial exhaust gas enters the first-stage absorption tower from bottom to top at a flow rate of 1.5L / min. The coal ash calcium calcium slag slurry is in contact with the industrial exhaust gas in the first-stage absorption tower, so that the contact time between the fly a...

Embodiment 3

[0044] The difference from Example 1 is that the mass content of sodium oxide in the silicon-calcium slag used in this example is 1.4%, and the moisture content is 38%.

[0045] (1) Mix silicon-calcium slag with water to form silicon-calcium slag slurry, heat the silicon-calcium slag slurry to 75°C, and the liquid-solid volume ratio of silicon-calcium slag to water is 12;

[0046] (2) The calcium-silicon slag slurry is sprayed from top to bottom into the first-stage absorption tower at a flow rate of 0.2L / min, and industrial exhaust gas enters the first-stage absorption tower from bottom to top at a flow rate of 0.5L / min, so that the powder The coal ash calcium calcium slag slurry is in contact with the industrial exhaust gas in the first-stage absorption tower, so that the fly ash calcium calcium slag slurry is in contact with the industrial exhaust gas for 20 minutes;

[0047] The steps in the other absorption towers are the same as in Example 1. After being absorbed by the ...

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Abstract

The invention provides a purification method for industrial emission gas. The purification method for the industrial emission gas includes the following the steps: (1) mixing silico-calcium residues into silico-calcium seriflux; and (2) enabling the silico-calcium seriflux to enter an absorption tower from top to bottom, enabling the industrial emission gas to enter the absorption tower from top to bottom, and enabling the silico-calcium seriflux to contact the industrial emission gas. The silico-calcium seriflux enters the absorption tower from top to bottom, the industrial emission gas enters the absorption tower from top to bottom, the silico-calcium seriflux and the industrial emission gas are enabled to conduct convection, full contact of the silico-calcium seriflux and the industrial emission gas is achieved, absorption effect of carbon dioxide is improved, and emission reduction of carbon dioxide is effectively achieved. The waste resource silico-calcium residues are used as raw materials to purify the industrial emission gas, and using waste to treat waste is achieved. Besides, the industrial emission gas is effectively purified, and meanwhile alkali content in the industrial waste material silico-calcium residues is reduced, and the industrial waste material silico-calcium residues are enabled to meet requirements of mixed additives and cement clinker raw materials. The purification method for the industrial emission gas possesses good social benefit and environment benefit, and meanwhile possesses good economic benefit.

Description

technical field [0001] The invention relates to energy saving and emission reduction technology, in particular to a method for purifying industrial exhaust gas. Background technique [0002] With the continuous development of industry, the amount of industrial exhaust gas emissions is increasing year by year. Changes in temperature, precipitation and other major climate characteristic values ​​have been observed around the world. The general trend of climate change is that temperature increases, precipitation increases, and extreme weather conditions are frequent. occur. With the global climate problem intensifying, for the important factor affecting the climate in industrial emissions CO 2 , and has attracted everyone's attention. In December 2009, the World Climate Conference in Copenhagen, held in the capital of Denmark, even put the issue of carbon emission reduction on the agenda. China is currently the world's largest CO 2 As an emission country, my country's annua...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/62
CPCY02A50/20
Inventor 孙俊民李鹏程白光辉刘鑫平李永超
Owner DATANG INT HIGH ALUMINA COAL R & D CENT
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