Desulfuration adsorbent as well as preparation method and application thereof

Abstract

The invention discloses a desulfuration adsorbent and a preparation method thereof. The preparation method comprises the following steps: 1) putting 1000 parts by weight of quick lime, 1-10 parts by weight of a water retaining agent, 5-15 parts by weight of a poring agent and 300-1000 parts by weight of digestion process water into a digester, and stirring for digestion to obtain a digestion product; 2) drying the obtained digestion product to obtain the high-performance desulfuration adsorbent. The water retaining agent is an organic compound containing at least one water retaining functionalgroup and comprises one or more of cellulose ether, a cellulose ether derivative, lignin and a lignin derivative; the poring agent is an organic compound of which the boiling point is less than or equal to 100 DEG C. Due to addition of the water retaining agent and the poring agent, lime digestion modification is implemented, the specific surface area of the prepared desulfuration adsorbent is upto 30m<2> / g or greater, the pore volume is up to 0.2cm<3> / g or greater, and the BJH (Barrett, Joyner and Halenda) aperture is concentrated within 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...

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

Images