Film separation and concentration system for removing heavy metals in garbage incineration fly ash

Abstract

The invention relates to a film separation and concentration system for removing heavy metals in garbage incineration fly ash. The system comprises a cleaning tank (3), a settling tank (4), a leaching tank (6) and a press filter (9), wherein a stirring device (10) and a fine aeration system (11) are arranged in the cleaning tank (3); the cleaning tank (3) is connected with the settling tank (4); the settling tank (4) is connected with a first-grade film filter system (5), and is connected with the leaching tank (6); the fine aeration system (11) is arranged in the leaching tank (6); the leaching tank (6) is provided with an acid pouring port and a surface active agent pouring port, and is connected with a second-grade film filter system (7); the second-grade film filter system (7) is connected with a three-grade film concentration system (8); and a fly ash outlet of the leaching tank (6) is connected with the press filter (9). The system can realize the recycling of waste water and leaching liquid in the film system, and generates no secondary waste water and waste liquid; and the fly ash and the leaching liquid achieve high-efficiency separation through a film technology.

Description

[technical field] [0001] The invention relates to the technical field of waste treatment, in particular to a membrane separation and concentration system for removing heavy metals in waste incineration fly ash. [Background technique] [0002] With the progress of society and the improvement of people's living standards, the output of municipal solid waste has also increased sharply. The current treatment technology mainly relies on landfill, composting and incineration. However, with the limitation of landfill and composting sites, the land shortage in many cities has caused the landfill to become increasingly saturated. Waste incineration has the advantages of fast processing speed, small footprint, and good reduction effect. At present, domestic and foreign municipal waste is more and more inclined to adopt incineration method. Japan, the United States and most European countries have generally adopted the incineration method, and the incineration rate in some countries a...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the above-mentioned deficiencies and provide a membrane separation and concentration system for removing heavy metals in waste incineration fly ash, which can realize the recycling of waste water and leachate inside the membrane system, without the generation of secondary waste water and waste liquid, In addition, the fly ash and the leachate are separated efficiently through membrane technology, which completely solves the problem of cross-contamination between fly ash and heavy metals

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