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

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.