Composite active carbon desulfurizer and preparation method thereof

Abstract

A composite active carbon desulfurizer is prepared from the following raw materials by weight: 100-120 parts of bamboo charcoal, 30-34 parts of quicklime, 10-12 parts of weathered coal, 3-4 parts of sodium hydroxide, 12-14 parts of sodium bicarbonate, 10-12 parts of ammonium bicarbonate, 30-35 parts of gypsum, 40-45 parts of fresh reed roots, 35-39 parts of zeolite, 5-6 parts of sodium tripolyphosphate, 4-5 parts of carboxymethylcellulose sodium, 2-3 parts of sodium laurate, 4-5 parts of auxiliary agents, and a proper amount of water. By using zeolite, fresh reed roots, weathered coal, gypsum and the like, after high temperature carbonization, the desulfurizer of the invention not only has adsorption and ion exchange effects, but also has antibacterial effect, saves the using amount of bamboo charcoal, and improves economic benefits and environmental protection benefits; by using a plurality of alkaline compounds, rapid and thorough desulfurization is realized; the desulfurizer of the invention can adsorb SO2, SO3, H2S, organic sulfur, n-butyl sulfur of waste gas and waste water, is wide in application, and causes no secondary pollution.

Description

technical field [0001] The invention relates to a desulfurizer, in particular to a composite activated carbon 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 washing...

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