Multifunctional flue gas treatment system

Abstract

The invention relates to a multifunctional flue gas treatment system. The multifunctional flue gas treatment system comprises an SCR (selective catalytic reduction) denitrification unit, a flue gas-air heat exchange unit, a bag type dedusting unit, a desulfurizing tower, a heating unit and a flue gas exhaust system which are sequentially connected by pipelines, wherein a wet type electrical mist removing unit is arranged between the desulfurizing tower and the heating unit, and is used for removing mist droplets in the flue gas treated by the desulfurizing tower, and exhausting the treated flue gas into the heating unit; the flue gas exchanges heat with the hot air outputted by the flue gas-air heat exchange unit in the heating unit, and then is exhausted into the flue gas exhaust unit; the desulfurizing tower is communicated with a wastewater treatment unit, and the wastewater treatment unit is used for receiving wastewater drained by the desulfurizing tower, and treating the wastewater. The multifunctional flue gas treatment system has the advantages that the structure is simple, the sulfur dioxide and oxynitride in the flue gas can be effectively removed, the residual heat can be effectively utilized, and the wastewater can be effectively treated.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a multifunctional flue gas treatment system. Background technique [0002] Environmental protection issues are increasingly being paid attention to by the society and the government. One of the main sources of pollution is the various pollutants contained in the coal-burning flue gas discharged from the production activities of industrial enterprises, such as SO 2 , NO X and soot, other strong acid gases (SO 3 , HCI, HF), trace amounts of heavy metals such as mercury, selenium, arsenic, and PM2.5 ultrafine dust. In order to eliminate the damage of these pollutants to the environment, various environmental protection technologies have emerged, such as the widely used electrostatic precipitator or bag filter technology, limestone (or lime)-gypsum dry or wet desulfurization technology, SCR denitrification technology, etc. The application of these technologies and their...

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Problems solved by technology

[0003] However, with the continuous increase of the types of pollutant control required by the state, the requirements for the cost, land occupation, and by-product treatment of pollutant treatment equipment are all increasing. At the same time, the existing treatment equipment for different pollutants Mutual influence and interaction lead to poor pollutant treatment effect and single function, which cannot effectively save energy and reduce energy consumption

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