Garbage incineration waste gas and flying ash co-processing system

Abstract

The invention discloses a garbage incineration waste gas and flying ash co-processing system. The garbage incineration waste gas and flying ash co-processing system comprises a cooling tower, a clothbag dust collector, an absorption tower, a washing tank, a flying ash collector, a water washing tank, a drying box, a granulator, a melting tank and a cooling tank, wherein the cooling tower, the cloth bag dust collector, the absorption tower and the washing tank are sequentially connected with a smoke exhausting cylinder of an incinerator; the flying ash collector is connected with the cooling tower and the cloth bag dust collector; the water washing tank, the drying box, the granulator, the melting tank and the cooling tank are sequentially connected with the flying ash collector; smoke generated in the melting tank is charged into the incinerator and is subjected to secondary treatment; flying ash generated in the melting tank enters the cooling tank which is connected with the meltingtank; the granulator is connected with an additive bin used for adding an additive into the granulator; the cooling tower and the cloth bag dust collector are each connected with a whitewash storagebin and an active carbon bin; the cloth bag dust collector is connected with an air compressor; washing liquid is placed inside the washing tank, wherein the volume ratio of the washing liquid to thesmoke is 1:(2-2.5). The garbage incineration waste gas and flying ash co-processing system disclosed by the invention has the advantages of realizing co-processing of waste gas and the flying ash andbeing low in cost and good in processing effect.

Description

technical field [0001] The invention relates to the technical field of waste treatment, more specifically, it relates to a co-processing system of waste gas and fly ash from waste incineration. Background technique [0002] In recent years, domestic waste incineration has attracted more and more attention due to its characteristics of large reduction and high resource utilization. However, toxic fumes, bottom slag and fly ash will be produced during the waste incineration process, which also restricts the popularization and application of this technology. Therefore, waste incineration pollution control has become a research hotspot in the field of environmental engineering. Among them, the output of fly ash is about 2%-5% of the mass of domestic waste. Fly ash not only contains high concentrations of heavy metal pollutants such as Pb, Hg, Cu, Cd, Zn, Ni and Cr, but also contains organic pollutants such as dioxins. Pollutants, therefore, waste incineration fly ash is includ...

AI Technical Summary

Problems solved by technology

However, it will reduce the performance of asphalt in actual use, and on the other hand, there will still be a small amount of heavy metal leakage, causing secondary pollution

[0004] The waste gas produced in waste incineration is mainly acid gas, such as CO, NOX, SO2, HCl, etc. In the prior art, the Chinese invention patent document with the application publication number CN104896488A discloses a system for treating waste gas from waste incineration. Although it has the advantages of no need to cool down after the exhaust gas is discharged, saving energy consumption and processing a large flow of exhaust gas, the function is relatively single, and it can only be used to treat exhaust gas.

[0005] The current treatment methods for waste incineration waste gas and fly ash have the following defects: 1. Poor synergy, waste incineration waste gas and fly ash treatment projects in waste incineration plants are completed separately; 2. High processing costs, waste incineration fly ash treatment methods mainly Landfilling after solidification takes up a large area and high treatment cost; 3. The treatment effect is low, and the incineration waste gas is discharged directly after treatment, causing damage to the surrounding environment; the solidification effect of fly ash is relatively poor, and the heavy metals and Dioxin has not been completely removed, which poses a potential risk to the surrounding environment of the landfill

During the long-term landfill treatment, the heavy metals and dioxins in the fly ash leach into the environment, causing secondary pollution

Images