A waste gas treatment system with plume dewhitening function

Abstract

The present invention provides a waste gas treatment system with a plume dewhitening function, the waste gas treatment system includes: an air distribution port, a combustion furnace, a ceramic filter, a bubbling bed gas filter, an absorber and a gas circulation pipeline. The gas circulation pipeline is provided with a sub-control valve, and when the contents of sulfide and nitrate in the gas in the gas circulation pipeline are lower than the preset value, the sub-control valve of the gas circulation pipeline is opened, and the gas Otherwise, the sub-control valve is closed, and the gas re-enters the combustion furnace; the passage where the sub-control valve is opened is also provided with a first demister and a second demister with the same structure, and the first demister The flue gas condensate water heat exchange device is installed between the demister and the second demister. The flue gas condensate water heat exchange device is arranged vertically. The cold source is low-temperature water from the circulating water system of the plant. To the circulating water return system, the water vapor content in the flue gas is significantly reduced after passing through the second demister, so as to achieve the effect of whitening the plume. The invention can realize three purposes of desulfurization, dust removal and whitening.

Description

technical field [0001] The invention relates to the field of environmental protection machinery, in particular to an exhaust gas treatment system with a plume whitening function. Background technique [0002] Exhaust gas refers to the poisonous and harmful gas emitted by human beings in the process of production and life. Especially in chemical plants, steel plants, pharmaceutical plants, coking plants and oil refineries, etc., the exhaust gas emitted is very smelly, which seriously pollutes the environment and affects human health. [0003] There are many types of pollutants in exhaust gas, their physical and chemical properties are very complex, and their toxicity is also different. The exhaust gas discharged from fuel combustion contains sulfur dioxide, nitrogen oxides (NOx), hydrocarbons, smoke and so on. Air pollution by exhaust gas is one of the most common and serious environmental problems in the world. [0004] In the conventional process, desulfurization and dus...

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Problems solved by technology

[0004] In the conventional process, desulfurization and dust removal are completed in their own devices as independent unit operations. This independent waste gas treatment process is costly, wastes space, and has a complicated process. Therefore, it is necessary to develop a The exhaust gas treatment system with dewhitening function, so as to achieve the two purposes of desulfurization and dust removal at the same time

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