Treatment system for cooperatively treating garbage incineration fly ash and garbage leachate

Abstract

The invention discloses a treatment system for cooperatively treating garbage incineration fly ash and garbage leachate. The treatment system for cooperatively treating the garbage incineration fly ash and the garbage leachate comprises a fly ash collection bin connected with flue gas purification equipment, a leachate collection pool located at the bottom of a garbage dump, as well as a washing pool, a drying box, a reaction kettle, a microwave treatment device, a solid-liquid separator, a melting furnace and a cooling pool which are sequentially connected with the fly ash collection bin, wherein a heat exchanger is connected to the leachate collection pool, and connected with the drying box through a pipeline; a filter material tower is connected to the bottom of the leachate collectionpool, and a compressor is connected to the reaction kettle; and the melting furnace is connected with the drying box through a pipeline, and flue gas generated due to melting is capable of drying thedrying box; and an adjuvant bin is connected to the melting furnace. The treatment system has the advantages of being capable of cooperatively treating the garbage incineration fly ash and the garbageleachate, good in treatment effect, and low in cost.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, more specifically, it relates to a treatment system for co-processing waste incineration fly ash and landfill leachate. Background technique [0002] There are three main methods of harmless disposal of urban waste in my country: landfill, incineration and composting. Domestic waste treatment in my country is mainly landfill, and the proportion of incineration and composting is relatively small, but the proportion of incineration is increasing every year. Compared with landfill, incineration has the advantages of volume reduction, weight reduction, and energy reuse. [0003] Garbage will undergo a certain amount of storage and drying before incineration, so a certain amount of landfill leachate will be produced. The typical characteristics of landfill leachate are high concentration of BOD and COD, high concentration of heavy metals, large changes in water quality and quantity, high...

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

[0007] At present, there are obviously some defects in the treatment methods of leachate and fly ash, mainly in the following aspects: 1. Poor synergy: the leachate treatment project and the fly ash treatment project in the existing waste incineration plant are both It is done separately; 2. High cost of treatment: landfill leachate needs to be treated by biodegradation, etc., and the treatment cost is high. The fly ash is mainly solidified and landfilled, which occupies a large area and has high treatment cost; 3. The treatment effect is low : It is difficult to control leachate during denitrification, which leads to poor treatment effect of leachate. At the same time, the solidification effect of fly ash is relatively poor, and the heavy metals and dioxins in the fly ash are not completely separated, which may cause potential damage to the surrounding environment of the landfill. risk

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

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