Green multi-metal cooperation stabilization agent for fly ash and application method for green multi-metal cooperation stabilization agent

Abstract

The invention belongs to the field of dangerous waste stabilizing treatment, relates to a method for treating incineration fly ash by mixing diethyl dithiocarbamate carbamate and ferrous sulfate (copperas) in a certain proportion as a stabilization agent, and provides a method for treating multiple kinds of heavy metal in incineration fly ash by mixing diethyl dithiocarbamate carbamate, phosphate and copperas in a certain proportion as an agent to solve the problems that in single use of an existing stabilization agent, many defects exists, for example, a chelating agent is high in use level, cost is high, and multiple kinds of metal are not likely to be fixed by single agents at the same time. According to the method, multiple kinds of heavy metal such as cadmium, lead, zinc and nickel in the incineration fly ash can be fixed at the same time, and therefore the leaching toxicity of the heavy metal is lowered, and the requirement of the Municipal Solid Waste Landfill Contamination Control Standard (GB16889-2008) is met. In addition, the method is low in cost, raw materials are easy to obtain, secondary pollution is avoided, and the treatment method is simple. The simple and feasible method for stabilizing treatment on household refuse incineration fly ash is provided, a great obstacle of restraining the cleanliness development of waste incineration enterprises is eliminated, great environment benefits can be achieved, and obvious economic benefits and good social benefits can be achieved.

Description

technical field [0001] The invention belongs to the field of chemical stabilization treatment of hazardous waste, and in particular relates to the application of a compound agent as an environmentally friendly agent for stabilizing heavy metals in waste incineration fly ash. Background technique [0002] With the development of my country's social economy and the improvement of people's material living standards, the amount of municipal solid waste continues to grow at a rate of 8%-10% per year. Great difficulty came. The basic disposal methods of MSW include landfill, incineration and composting. Among them, the incineration method can reduce the volume of garbage by 90%, and reduce the volume by 75%. The heat energy generated can be recycled, and it can maximize the reduction, harmlessness, and recycling of domestic garbage, and it occupies the least land resources. [0003] Fly ash refers to the substances collected in the heat recovery system and flue gas purification s...

AI Technical Summary

Problems solved by technology

[0008] One of the purposes of the present invention is to overcome the many deficiencies in the single use of existing stabilizing agents, such as the large amount of chelating agent added, poor acid resistance, and the difficulty of fixing multiple metals at the same time with a single agent, and propose a composite fixing agent and The method of use can simultaneously fix various heavy metals such as cadmium, lead, zinc, chromium, and nickel in the incineration fly ash, reduce the amount of chemicals used, reduce the cost of treatment, and has a strong ability to resist acid and alkali, eliminating the need to restrict the cleanliness of waste incineration enterprises. An important obstacle to the development, in order to meet the requirements of controlling the cost of waste incineration fly ash stabilization treatment and meeting the long-term safety of fly ash treatment

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