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A kind of desulfurization absorbent and its preparation method and application

An absorbent and reaction technology, applied in the field of desulfurization absorbent and its preparation, can solve the problems of low desulfurization activity, waste of resources, lack of overall management and standard mechanism, etc., and achieve the effect of large specific surface area, large pore volume, and excellent desulfurization activity

Active Publication Date: 2021-12-24
厦门朗净钙业科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the lime industry in developed countries in Europe and the United States (such as Canada, Belgium, Italy, the United States, etc.), the development of China's lime industry generally presents the characteristics of "small, scattered, and chaotic" and lacks an overall management and regulation mechanism
Especially for the emerging flue gas desulfurization market, lime products have been "caught off the shelves", and there is no systematic development of high-efficiency lime products for desulfurization. Most of the desulfurization lime products for desulfurization have low desulfurization activity. In order to meet the national emission targets, enterprises must It often wins by quantity, and invests a large amount of desulfurizer, resulting in waste of resources, increasing operating costs and by-product emissions

Method used

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  • A kind of desulfurization absorbent and its preparation method and application
  • A kind of desulfurization absorbent and its preparation method and application

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preparation example Construction

[0037] The present invention also provides a method for preparing the desulfurization absorbent described in the above technical solution, comprising the following steps:

[0038] a) quicklime, water-retaining agent, cell agent and water are mixed and reacted to obtain a digested product;

[0039] b) drying the digested product to obtain a desulfurization absorbent.

[0040] In the preparation method provided by the invention, quicklime, water retaining agent, cell agent and water are firstly mixed for digestion. Wherein, the mass ratio of the quicklime to water is preferably 1000:(300~1000), specifically 1000:300, 1000:400, 1000:500, 1000:600 or 1000:700; the temperature of the water is preferably 0-50°C, specifically 10°C, 20°C, 30°C, 40°C, 50°C. In the present invention, it is preferred to firstly mix the water-retaining agent, the cell agent and water to obtain an aqueous solution; then the quicklime and the aqueous solution are mixed and reacted. In the present invention...

Embodiment 1

[0055] Grinding quicklime (CaO content 85-95wt%) and sieving to obtain calcium oxide powder with a particle size larger than 100 mesh. Add 100 parts by weight of calcium oxide powder to a mixed solution of 40 parts by weight of water (about 20° C.), 0.2 parts by weight of sodium carboxymethylcellulose and 1 part by weight of n-pentane. Stir at 500r / min for 1min, then adjust the rotation speed to 200r / min, continue stirring for 4min, and air-dry the obtained product at 200°C until the moisture content is <1%, to obtain a desulfurization absorbent.

Embodiment 2

[0057] Grinding quicklime (CaO content 85-95wt%) and sieving to obtain calcium oxide powder with a particle size larger than 100 mesh. Add 100 parts by weight of calcium oxide powder to a mixed solution of 40 parts by weight of water (about 20° C.), 0.3 parts by weight of sodium lignosulfonate and 1.2 parts by weight of cyclopentane. Stir at 300r / min for 1min, then adjust the rotation speed to 200r / min, continue stirring for 4min, and air-dry the obtained product at 200°C until the moisture content is less than 1%, to obtain a desulfurization absorbent.

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Abstract

The invention discloses a desulfurization absorbent and a preparation method thereof. 1 part of digestion process water is added to the digester, stirred and digested to obtain a digested product; 2) drying the obtained digested product to obtain a high-performance desulfurization absorbent. The water-retaining agent is an organic compound containing at least one water-retaining functional group, including one or more of cellulose ether, cellulose ether derivatives, lignin and lignin derivatives; the cell agent has a boiling point≤100 ℃ of organic compounds. In the present invention, the specific surface area of ​​the prepared desulfurization absorbent can reach 30m by adding water-retaining agent and cell agent to carry out lime digestion and modification. 2 / g or more, the pore volume can reach 0.2cm 3 / g or more, the BJH pore diameter is concentrated at 5-20nm.

Description

technical field [0001] The invention belongs to the field of flue gas desulfurization, in particular to a desulfurization absorbent and its preparation method and application. Background technique [0002] At present, the circulating fluidized bed flue gas desulfurization process mainly uses dry slaked lime powder as the desulfurization absorbent. During the desulfurization process, the slaked lime powder absorbs water in the atomized water area to form a water film, and the SO 2 After dissolving in the water film, it reacts with slaked lime, and then the water film is evaporated by the high-temperature flue gas, and then enters the dust collector at the back end of the absorption tower, and the collected slaked lime powder enters the absorption tower again, and so on. At present, there are two main sources of slaked lime powder: one is to directly purchase slaked lime powder that meets the requirements, and the other is to purchase quick lime powder that meets the requirem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/81B01D53/50
CPCB01D53/508B01D2251/404B01D2251/604B01D2251/602B01D2258/0283
Inventor 赖毅强廖坤添卢茂源张志超吴慕正张原林春源王建春
Owner 厦门朗净钙业科技有限公司
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