Roasting flue gas treatment system and treatment method thereof

Abstract

The invention relates to a roasting flue gas treatment system and a treatment method thereof. The roasting flue gas treatment system comprises flues; each flue is communicated with the top of each cooling tower and the bottom of a chimney, the lower portion of the cooling tower is connected with an electrical tar precipitator through an electrical tar precipitator flue, the electrical tar precipitator is connected with a reactor through an electrical tar precipitator rear flue, the reactor is connected with a slaker through a raw material feeding pipeline and is connected with the upper portion through a pipeline and a bag-type dust collector, the bag-type dust collector is connected with the reactor through a circulation material feeding pipeline, the slaker is connected with a raw material storage bin through a pipeline, the bottom of the bag-type dust collector is connected with a material hoist through a waste feeding pipeline, the material hoist is connected with a reject bin through the waste feeding pipeline, and the top of the reactor is connected with the chimney through the bag-type dust collector. The roasting flue gas treatment system is simple in process, free of secondary pollution and pipeline corrosion, thorough in pollutant treatment, low in transportation volume, simple in running and maintaining and high in market prospect.

Description

technical field [0001] The invention relates to a flue gas treatment system and treatment method, in particular to a roasting flue gas treatment system and treatment method, which are mainly used in the purification treatment of carbon flue gas in electrolytic aluminum plants and other related acid gases containing sulfur dioxide, tar and Dust exhaust gas treatment field, such as electrode and coking industry. Background technique [0002] The main pollutants in carbon plants in the electrolytic aluminum industry are the roasting fumes produced during the anode roasting process, which contain tar, dust, hydrogen fluoride, benzopyrene and sulfur dioxide. With the improvement of national environmental protection standards, the country has higher and higher requirements for various pollutant discharge indicators, and many new and renovated enterprises are facing environmental protection pressure. Moreover, the increase in sulfur content in carbon raw materials on the market ha...

AI Technical Summary

Problems solved by technology

[0013] This process can remove most of sulfur dioxide, dust, benzopyrene, tar and fluoride in the flue gas, but the removal efficiency of fluoride is not high, and the resistance loss of the incinerator is large, the energy consumption of the system is high, and a certain amount of gas is required. Overall running costs are higher

[0014] Comprehensive analysis shows that the above methods have disadvantages such as high energy consumption of the system, high investment in equipment, incomplete treatment of pollutants, and serious corrosion of equipment.

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