A Membrane Separation and Concentration System for Removing Heavy Metals in Waste Incineration Fly Ash

Abstract

The invention relates to a membrane separation and concentration system for removing heavy metals in waste incineration fly ash, comprising a cleaning tank (3), a sedimentation tank (4), a leaching tank (6), a filter press (9), and a cleaning tank (3) ) is equipped with a stirring device (10) and a fine aeration system (11), the cleaning tank (3) is connected to the sedimentation tank (4), the sedimentation tank (4) is connected to the primary membrane filtration system (5), and the sedimentation tank (4) Connect the leaching tank (6), the leaching tank (6) is provided with a fine aeration system (11), the leaching tank (6) is provided with an acid input port and a surfactant input port, the leaching tank (6) Connect the secondary membrane filtration system (7), the secondary membrane filtration system (7) connects the tertiary membrane concentration system (8), and the fly ash outlet of the leaching tank (6) connects the filter press (9); the present invention can realize The waste water and leachate are recycled inside the membrane system, no secondary waste water is produced, and fly ash and leachate are separated efficiently through membrane 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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