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Method for removing sulfur dioxide in exhaust gas

A technology of sulfur dioxide and fumed silica, which is applied in chemical instruments and methods, separation methods, inorganic chemistry, etc., can solve problems such as the ability to adsorb sulfur dioxide that have not been mentioned, and achieve the reduction of conditional guarantee consumption, reduction of recovery costs, and adsorption capacity big effect

Inactive Publication Date: 2019-08-09
SINOSTEEL MAANSHAN INST OF MINING RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorbent does not mention its ability to adsorb sulfur dioxide at high temperatures, but the temperature of coal-fired flue gas emitted from industrial production is relatively high, and it is urgent to develop an adsorbent suitable for adsorbing sulfur dioxide in flue gas at high temperatures. Materials and methods

Method used

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  • Method for removing sulfur dioxide in exhaust gas
  • Method for removing sulfur dioxide in exhaust gas
  • Method for removing sulfur dioxide in exhaust gas

Examples

Experimental program
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Effect test

Embodiment example 1-1

[0039] Using the sulfur dioxide adsorbent prepared in Example 1, a method for removing sulfur dioxide in the flue gas of the present invention: carry out in a fluidized bed, make the flue gas fully contact with the adsorbent, the flue gas flow rate is 2.0L / min, and the flue gas The concentration of sulfur dioxide is 500ppm, and the adsorption temperature is 350°C. The contact pressure is 0.15MPa, the adsorption cycle is 24 hours, the sulfur dioxide removal rate is 88.7%, and the sulfur adsorption capacity is 5.5%.

Embodiment example 1-2

[0041] Using the sulfur dioxide adsorbent prepared in Example 2, a method for removing sulfur dioxide in the flue gas of the present invention: carry out in a fluidized bed, make the flue gas fully contact with the adsorbent, the flue gas flow rate is 3.0L / min, and the flue gas The concentration of sulfur dioxide is 750ppm, and the adsorption temperature is 500°C. The contact pressure is 0.25MPa, the adsorption cycle is 28 hours, the sulfur dioxide removal rate is 90.3%, and the sulfur adsorption capacity is 5.7%.

Embodiment example 2-1

[0043] Using the sulfur dioxide adsorbent prepared in Example 1, a method for removing sulfur dioxide in the flue gas of the present invention: carry out in a fixed bed, make the flue gas fully contact with the adsorbent, the flue gas flow rate is 5.0L / min, and the sulfur dioxide in the flue gas The concentration is 350ppm, and the adsorption temperature is 400°C. The contact pressure is 0.18MPa, the adsorption cycle is 12 hours, the sulfur dioxide removal rate is 91.7%, and the sulfur adsorption capacity is 5.2%.

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Abstract

The invention discloses a method for removing sulfur dioxide in exhaust gas. The adopted method comprises the steps that 4.6-5.6 parts of an ammonia hydroxide solution, 36.8-44.4 parts of a cetrimonium chloride solution, 3.0-6.9 parts of a tetramethyl ammonia hydroxide pentahydrate, 35.5-41.0 parts of a tetramethylammonium silicate solution and 4.0-9.8 parts of gas phase silicone dioxide are adopted for generating reaction gel; then, the mixture is placed into a hydrothermal reaction kettle, concentrated sulfuric acid is added, pH is regulated, a hydrothermal reaction continues to be performedfor 1-4 times, a product obtained after air drying is subjected to powder calcinating to obtain a sulfur dioxide adsorbent, the sulfur adsorbent is put into a fluidized bed or a fixed bed or a movable bed, exhaust gas makes sufficient contact with the sulfur dioxide adsorbent, and the contact pressure is controlled to be 0.1-0.3 MPa. the method has the advantages that the sulfur dioxide removal rate is high, the sulfur adsorption capacity is large, and the method is suitable for being implemented under the high temperature of 250-800 DEG C, and the method is particularly suitable for treatment of coal-fired flue gas under the high temperature environment such as metallurgy and electricity.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to a method for removing sulfur dioxide in flue gas, which is especially suitable for the treatment of coal-fired flue gas in high-temperature environments such as metallurgy and electric power. Background technique [0002] As we all know, SOx emitted into the atmosphere due to the combustion of fossil fuels has caused serious pollution to the atmospheric environment and poses a serious threat to the survival of humans, animals and plants. According to the 2015 National Environmental Statistical Bulletin, SO 2 The emission was as high as 18.591 million tons, which had a great impact on people's production and life. How to economically and effectively control SOx emissions has become an important issue faced by the majority of desulfurizers. [0003] In order to reduce or eliminate the further harm caused by sulfur emissions, the country requires ultra-low e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30B01D53/02
CPCB01D53/02B01D2257/302B01J20/16
Inventor 李刚华绍广王杰王涛杨晓军刘龙
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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