Shield muck zero-discharge treatment system and method

Abstract

The invention relates to a shield muck zero-discharge treatment system and method. The system comprises a vibration screening machine, a spiral sand washing machine, a rough sand belt conveyor, a cyclone separator, a fine sand recycling machine, a fine sand belt conveyor, a clean water spraying device, a clean water conveying device, a flocculation purifying tank, an automatic chemical feeding device and a pressure filter. The lower portion of the vibration screening machine is provided with a hopper, a discharging opening of the hopper is connected with a first pipeline, a sand washing grooveof the spiral sand washing machine is formed below the first pipeline, an overflow pipeline connected with a sewage pond is arranged, a feeding opening of the rough sand belt conveyor is located below a discharging opening of the spiral sand washing machine, a feeding opening of the cyclone separator communicates with the sewage pond, the fine sand recycling machine is located below a bottom flowopening of the cyclone separator, a feeding opening of the fine sand belt conveyor is located below a discharging opening of the fine sand recycling machine, a water outlet of the clean water spraying device is arranged above the vibration screening machine, an water outlet of the clean water conveying device is arranged above the sand washing groove, the flocculation purification tank communicates with the cyclone separator, and the automatic chemical feeding device and the pressure filter communicate with the flocculation purification tank. Shield muck is subjected to site treatment, shieldmuck is separated into stone and sand to be recycled, and the sewage zero discharge is achieved.

Description

technical field [0001] The invention belongs to the technical field of slag treatment, and relates to a shield machine slag treatment technology, in particular to a shield machine slag zero discharge treatment system and method. Background technique [0002] In the process of rapid social development, a large number of urban tunnels and subways are being constructed as social infrastructure construction. The shield construction method is used in urban tunnels and subways because of its safety, high construction efficiency, low cost and wide applicability. During construction, a large amount of shield dregs are produced during the shield tunneling method, and how to deal with the shield dregs generated during shield tunneling is an important issue. [0003] The current treatment method for shield muck is to directly transport it outside for landfill and stacking. This treatment method will form a construction dregs disposal area where it is difficult for plants to grow, not o...

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Problems solved by technology

[0003] The current treatment method for shield muck is to directly transport it outside for landfill and stacking. This treatment method will form a construction dregs disposal area, where it is difficult for plants to grow, not only occupying land, but also causing Severe environmental pollution, for example: due to the unstable accumulation of water-containing slag, landslides, landslides and other disasters are prone to occur, which is one of the main pollution sources of sand and dust pollution; liquid leaching of slag will cause damage to water sources near the construction slag treatment and disposal area. severe pollution

In addition, due to the high mud content and high water content of the shield muck, leakage will inevitably occur during transportation, causing pollution to the road environment

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