Attapulgite flue gas desulfurizer and preparation method thereof

Abstract

An attapulgite flue gas desulfurizer is prepared from the following raw materials by weight: 100-120 parts of attapulgite, 40-45 parts of active carbon, 20-24 parts of magnesium chloride, 4-5 parts of zinc oxide, 25-28 parts of calcium oxide, 6-8 parts of sodium carbonate. 20-24 parts of wild chrysanthemum flowers, 10-12 parts of cordate houttuynia, 35-40 parts of monazite powder, 5-7 parts of sodium metasilicate, 3-4 parts of coconut fatty acid monoethanolamide, 4-5 parts of auxiliary agents, and a proper amount of water. By using attapulgite and monazite powder, the desulfurizer of the invention has adsorption decoloration and ion exchange effects, has good adsorption effect on sulfur dioxide, decreases the using amount of active carbon, and reduces the cost; by using wild chrysanthemum flowers and cordate houttuynia, the desulfurizer of the invention not only has adsorption effect, but also has antibacterial effect after carbonization; by using a plurality of basic metal oxides, rapid desulfurization is realized; the desulfurizer of the invention is high in porosity, large in adsorption quantity, easy to regenerate, and simple in production process, and can greatly reduce the operation cost of dry-method desulfurization.

Description

technical field [0001] The invention relates to a denitration and desulfurization agent, in particular to an attapulgite flue gas desulfurization agent and a preparation method thereof. Background technique [0002] At present, there are three main methods of flue gas desulfurization agent: one is the combustion sulfur fixation method, which is to add a certain amount of sulfur fixer to the coal, so that the sulfur dioxide generated during the combustion of coal will react with the sulfur fixer, and the sulfate will be discharged together with the slag. , this method is more costly. Another method is wet desulfurization, which mainly adopts spraying method and uses alkaline aqueous solution to absorb sulfur dioxide in flue gas. The land area is large, and the requirements for equipment anti-corrosion are high. Another method is activated carbon adsorption. This method has a short service life of activated carbon, complex regeneration, low desulfurization efficiency, large ...

AI Technical Summary

Problems solved by technology

Another method is wet desulfurization, which mainly adopts spraying method, and uses alkaline aqueous solution to absorb sulfur dioxide in flue gas. Large area, high requirements for equipment anti-corrosion

Another method is the activated carbon adsorption method, which has a short service life of activated carbon, complicated regeneration, low desulfurization efficiency, large water consumption for washing, easy to cause secondary pollution, and high price of activated carbon, which increases the cost.

[0003] There are two main ways to remove NO and NO2 from flue gas. One is to reduce NO and NO2, such as using ammonia (NH3) as a reducing agent to reduce it to nitrogen. It is necessary to continuously adjust NH3 according to the operating load of the boiler. The amount of injection and the location of injection to ensure that NH3 is injected at the optimum temperature, this method has high operating costs; the other is to convert it into nitrate by oxidation, so as to achieve the purpose of removing NO and NO2