Wet-type purification treatment method and device for flue gas of domestic garbage incineration power plant

Abstract

The invention discloses a wet-type purification treatment method and device for flue gas of a domestic garbage incineration power plant. An ammonia water quenching device, a power spray activated carbon device and a bag-type dust collector are sequentially connected through air ducts, the air inlet end of the ammonia water quenching device can be connected with the flue gas outlet end of the domestic garbage incineration power plant, and a compressed air system is further connected to the air duct between the ammonia water quenching device and the power spray activated carbon device; a compressed air system is arranged below a dust hopper of the bag-type dust collector, the dust hopper is connected with a flying dust bin through a pipeline, an outlet flue of the bag-type dust collector is connected with a washing and concentration section of a wet-type deacidifying tower through a pipeline, and the wet-type deacidifying tower comprises an absorption section, the washing and concentration section and an oxidizing section; spray nozzles capable of spraying ammonia water are arranged in the absorption section of the wet-type deacidifying tower, a flue gas exhaust pipeline of the wet-type deacidifying tower is connected with defogging equipment, the oxidizing section of the wet-type deacidifying tower is connected with an oxidation air blower, and an ammonia chloride and ammonia sulfate outlet of the oxidizing section of the wet-type deacidifying tower is connected with crystallizing equipment.

Description

technical field [0001] The invention belongs to the field of domestic waste treatment, and in particular relates to a method and device for wet purification treatment of flue gas in a domestic waste incineration power plant. Background technique [0002] With the development of China's urbanization, urban domestic waste is increasing, bringing the hazards of garbage siege, threatening human health and urban ecology. The conventional disposal methods of municipal solid waste include landfill, composting and incineration. Waste incineration has attracted much attention and developed rapidly due to its advantages of complete harmlessness, large capacity reduction, short processing time, small footprint, and heat recovery. As of the end of 2014, my country has built and operated 330 domestic waste incineration power plants, among which Beijing, Shenzhen, Shanghai, Guangzhou and other places have large processing capacity and advanced facilities. The "Twelfth Five-Year Plan" wi...

AI Technical Summary

Problems solved by technology

[0008] 2. Organic pollutants

[0013] 2. Traditional flue gas purification treatment

However, sodium hydroxide is used as an absorbent to produce wastewater containing high concentrations of inorganic chloride salts and heavy metals, which must be treated before being discharged; equipment investment is high and operating costs are also high

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