Two-stage gas generators will also produce industrial waste gas and pollution during production. In line with the principle of environmentally friendly production, it is important to properly handle pollutants. So how to deal with these pollutants?
       1. The lower section gas is generally removed by a cyclone dust collector, with a removal efficiency of 80%.
       2. The gas in the upper section first passes through the electric tar collector. The electric tar collector itself has a very good removal effect on smoke and dust, which can generally reach 90%.
       3. After the two stages of gas are mixed, they enter the electric light oil collector, and the smoke and dust removal effect is also 90%.
       H2S can be removed by iron oxide method. This method uses iron hydroxide as the desulfurizer and adds limestone, wood chips and water. This method is widely used in H2S removal in two-stage gas generators, and the removal efficiency can reach 99%. In this method, the desulfurizer is extracted with perchlorethylene in the extractor. The regenerated desulfurizer can be recycled. The sulfur-containing perchlorethylene is heated in the decomposition tower to decompose sulfur, and the dissolved sulfur is discharged out of the tower. The perchlorethylene can be recycled after cooling.
       Activated carbon is a commonly used solid desulfurizer. It has the catalytic effect of accelerating the oxidation of H2S to S at room temperature and adsorbing sulfur. The sulfur deposited on the activated carbon can be extracted and recovered with appropriate ammonium sulfide, and the activated carbon can be reused. Air is passed through the activated carbon layer to convert H2S into S and water, and then the sulfur is washed away with 15% ammonium sulfide aqueous solution, and the activated carbon is regenerated. The H2S removal efficiency of activated carbon adsorption method is generally 90%. When the activated carbon adsorption method is used in a two-stage gas generator, attention should be paid to the removal of tar and light oil from the gas, and after the gas needs to be cooled down, the processing temperature should be less than 60°C.
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