Waste gas treatment system having smoke plume purifying function

Abstract

The invention provides a waste gas treatment system having a smoke plume purifying function. The waste gas treatment system comprises an air distribution port, a combustion furnace, a ceramic filter,a bubbling bed gas filter, an absorber and a gas circulating pipeline, wherein the gas circulating pipeline is provided with a control valve, the control valve of the gas circulating pipeline is turned on when the sulfide content and nitride content in gas in the gas circulating pipeline are both lower than preset values, gas is discharged into the atmosphere, and if not, the control valve is turned off, and gas enters the combustion furnace again; a control valve opening passageway is also provided with a first demister and a second demister which are identical in structure, a smoke condensing, bleeding and heat exchange device is arranged between the first demister and the second demister and adopts a vertical arrangement mode, a cold source adopts the low-temperature water from a plant-area circulating water system, the water flows back to a circulating water return system after heat exchange, the vapor content in smoke plume is remarkably decreased after being treated by the seconddemister, and accordingly the smoke plume purifying effect is achieved. The waste gas treatment system can achieve the desulfuration, dust removal and purifying purpose.

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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