A method for rebuilding a landfill by utilizing low-concentration gas oxidation treatment

Abstract

The invention relates to a method for renovating a landfill by utilizing low-concentration gas oxidation treatment, comprising the following steps: S1. garbage incineration fly ash collection: establishing a garbage incineration fly ash collection system to collect the garbage incineration fly ash; S2. garbage incineration Fly ash pretreatment: pretreatment of waste incineration fly ash to obtain fly ash pretreatment product; S3. Reduction reaction: water is added to fly ash pretreatment product, mixed evenly, and then low-concentration gas gas is introduced, and the temperature is heated to increase the temperature. It undergoes a reduction reaction with the fly ash filter residue; S4. Separation treatment: the solid phase and liquid phase of the reaction product in S3 are separated by a centrifuge, and the fly ash residue is dried and recycled. In the invention, gas is introduced into the waste incineration fly ash treatment process, so that the gas and the elements in the waste undergo a reduction reaction, the waste incineration fly ash is harmlessly treated, and the valuable utilization of the gas oxidation treatment waste is realized at the same time.

Description

technical field [0001] The invention belongs to the technical field of gas, and relates to a method for utilizing low-concentration gas oxidation treatment to rebuild a landfill. Background technique [0002] Garbage disposal methods can generally be divided into sanitary landfill, incineration, composting and other methods. The garbage landfill is a centralized garbage storage site under the sanitary landfill method. The garbage sanitary landfill is low in cost and good in hygiene in China. is widely used. However, there are still various problems with the various methods of converting landfills on the market. [0003] For example, a method for low-temperature melting and harmless treatment of waste incineration fly ash and bottom ash disclosed in the authorized announcement number CN110252776A, although it realizes the low-temperature melting and harmless treatment of waste incineration fly ash and bottom ash, it can also be colored Metallurgy provides some raw materials...

AI Technical Summary

Problems solved by technology

However, there are still various problems in the various methods of rebuilding landfills on the market.

[0003] For example, the authorized announcement number is CN110252776A, which discloses a method of low-temperature melting and harmless treatment of waste incineration fly ash and bottom ash. Metallurgy provides part of the raw materials for production and realizes the recycling of resources, but it does not solve the existing problems in the existing methods of rebuilding landfills: it is not convenient to recycle the fly ash of waste incineration through reduction reactions. If the waste Incineration fly ash is directly landfilled, which not only increases environmental pollution, but also increases the utilization rate of landfills. Therefore, we propose a method of using low-concentration gas oxidation treatment to rebuild landfills

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