Waste incineration flue gas purification system and overall solution process

Abstract

The invention relates to the technical field of flue gas purification and discloses a waste incineration flue gas purification system and an overall solution process. The system includes a flue, a dust collector, a dioxin decomposition and removal device, a low-temperature SCR, an MGGH system, a Washing tower, fly ash collection device, fly ash washing and dewatering system, sewage disposal system and induced draft fan. The inlet side of the dust collector is connected to the flue, the outlet side of the dust collector is connected to the dioxin decomposition and removal device, and the dust collector is connected to the fly ash collection device; the fly ash collection device is connected to the fly ash washing and dehydration system; The inlet of SCR, flue gas radiator and flue gas scrubber, the outlet of flue gas scrubber is connected to the inlet of flue gas reheater, and the outlet of flue gas scrubber is respectively connected to fly ash washing and dehydration system and sewage treatment system; The outlet of the flue gas reheater is connected with the induced draft fan. The invention has low cost, can effectively purify flue gas, reduce the concentration of various pollutants in the flue gas, and basically realize zero emission of pollution.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a waste incineration flue gas purification system and an overall solution process. Background technique [0002] With the process of urbanization and the development of industry and medical and health services, the treatment and disposal of various wastes has attracted more and more attention. As one of the most effective means of disposing of waste, waste incineration has been widely used. [0003] Since garbage is a mixture with relatively complex components, which contains some organic compounds, chlorides, sulfides, fluorides, etc., and also contains a large amount of heavy metals, according to relevant data, the content of chromium is generally 100-450g / t, nickel 50-200g / t copper, 450-2500g / t copper, 900-3500g / t zinc, 750-2500g / t lead, 10-40g / t cadmium, 2-7g / t mercury; Except for a small part of heavy metals, a small amount of heavy metals will exist in the b...

AI Technical Summary

Problems solved by technology

Among them, the main problems of melting and sintering are large energy consumption, high tail gas treatment costs and high operating costs; the solidification method is a process of mixing and containing fly ash in inert materials by physical and chemical methods to stabilize it, and its main disadvantages It cannot fundamentally solve the problem of dioxins in fly ash, some heavy metals are easy to precipitate, and increase the final disposal amount of hazardous waste. The stabilization treatment method is to add an appropriate amount of heavy metal stabilizer to fly ash, and fully Insoluble compounds are formed after mixing, the main problem with this method is the high cost of stabilizers, resulting in higher fly ash disposal costs, and the generation of waste water with high concentrations of inorganic salts that needs to be treated

[0020] Generally, safe landfill after solidification and stabilization is the final way of fly ash disposal, which occupies a large amount of land resources and has a long-term impact on the environment

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