Active carbon-based flue gas desulfurizer and preparation method thereof

Abstract

An active carbon-based flue gas desulfurizer is prepared by the following raw materials by weight: 100-120 parts of active carbon, 7-9 parts of polyvinyl alcohol, 22-24 parts of quicklime, 4-6 parts of sodium carbonate, 26-28 parts of chitosan, 3-4 parts of Arabic gum, 1-2 parts of sodium alginate, 30-34 parts of meerschaum, 10-12 parts of wormwood, 20-24 parts of licorice, 20-24 parts of herba andrographitis, 2-3 parts of coconut fatty acid monoethanolamide, 4-5 parts of auxiliary agents, and a proper amount of water. By using Chinese herbal medicines such as wormwood, licorice, and herba andrographitis to process active carbon, the desulfurizer of the invention not only has good adsorption effect, but also has antibacterial effect; by using meerschaum and chitosan, the desulfurizer of the invention has good adsorptivity, good ion exchange performance, and high temperature resistance, can save active carbon, and causes no secondary pollution; the desulfurizer of the invention is not liable to disintegration, is rapid and thorough for flue gas desulfurization, is also applicable to water desulfurization, is simple in preparation and easy to regenerate, and has good economic benefits.

Description

technical field [0001] The invention relates to a desulfurizer, in particular to an activated carbon-based flue gas desulfurizer 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 water consumption for w...

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