Environment-friendly solid waste resource utilization method

Abstract

The invention discloses an environment-friendly solid waste resource utilization method which comprises the following steps: step (S1), solid waste incineration treatment: step (S11), collecting and putting solid waste into an incinerator for incineration, so as to obtain slag, incinerator waste gas, fly ash and steam after incineration; and step (S12), performing dust removal and purification treatment on the waste gas, discharging the waste gas after the waste gas reaches the emission standard, and collecting residues after the waste gas purification treatment. Through preheating treatment and rotary kiln firing, dioxin emission is reduced through firing at the high temperature of 1400 DEG C or above in the rotary kiln and in the alkaline atmosphere of cement raw materials, slag, residues and heavy metal particles can become molten glass at the high temperature, and the molten glass can be made into cement clinker after being quenched. The slag and residues can be effectively recycled, heavy metal particles can be effectively removed, emission of dioxin is reduced, and the purposes of environmental protection and resource utilization are achieved.

Description

technical field [0001] The invention relates to a resource utilization method of environment-friendly solid waste. Background technique [0002] Solid waste refers to the solid, semi-solid, and gaseous objects, substances and Articles and substances that are included in waste management as stipulated by laws and administrative regulations. Liquid wastes that cannot be discharged into water bodies and gaseous substances placed in containers that cannot be discharged into the atmosphere. Because most of them are more harmful, they are generally classified into the solid waste management system. [0003] After the solid waste is incinerated, the slag, residue and fly ash collected from the exhaust gas purification system and heat recovery system (economizer, boiler) contain a large amount of soluble heavy metals and dioxins and cannot be directly landfilled. , belongs to the hazardous waste HW18 category. In the existing recycling technology, the fly ash is basically treated...

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Problems solved by technology

[0003] After the solid waste is incinerated, the slag, residue and fly ash collected from the exhaust gas purification system and heat recovery system (economizer, boiler) contain a large amount of soluble heavy metals and dioxins and cannot be directly landfilled. , belongs to the hazardous waste HW18 category. In the existing recycling technology, the fly ash is basically treated as a resource. The slag and residues are directly incinerated to remove soluble heavy metals and dioxins and then landfilled, which not only wastes fuel resources and increases The workload of landfill, and the slag and residues have not been effectively recycled

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