A method for treating flue gas

Abstract

The invention relates to a flue gas treatment method, which is mainly used for the treatment of flue gas produced by garbage incinerators. Firstly, a spraying device is installed in the incinerator, and the spraying device sprays a reducing agent into the incinerator to make the reducing agent and the incinerator The generated flue gas is contacted to reduce the concentration of nitrogen oxides in the flue gas. Then, the flue gas is passed into the cooling reaction tower for cooling treatment, and the cooled flue gas is then sent to the bag filter for dust removal treatment. After dust removal The flue gas is passed into the wet scrubber for treatment, and finally, the treated flue gas is dehumidified by the flue gas reheater before being discharged; the dust removal rate of the present invention is high, and heavy metal particles can be effectively removed to meet the emission standard, which can effectively suppress Dioxins are re-synthesized while removing acid gases in the flue gas.

Description

technical field [0001] The invention relates to the field of flue gas treatment, in particular to a flue gas treatment method, which is mainly used for the treatment of flue gas produced by garbage incinerators. Background technique [0002] With the rapid development of social economy, the city's domestic waste is also increasing rapidly. These domestic wastes are gradually polluting the environment. Therefore, a method of waste incineration for power generation has emerged, but various compounds, smoke and heavy metals are produced during the waste incineration process. The main components of the mixed flue gas are: smoke, carbon monoxide, nitrogen oxides, sulfur dioxide, hydrogen chloride, mercury, cadmium, lead, and dioxins. directly endanger the environment and human health. At present, in this flue gas treatment method, although the concentration of dioxins can be reduced at the beginning, due to the high temperature of the flue gas in the subsequent treatment, dioxin...

AI Technical Summary

Problems solved by technology

At present, in this flue gas treatment method, although the concentration of dioxins can be reduced at the beginning, due to the high temperature of the flue gas in the subsequent treatment, dioxins continue to be synthesized, resulting in the content of dioxins in the emitted flue gas It is still relatively high, and the requirements for dust removal equipment are low, resulting in low removal rate of heavy metals in flue gas

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