Shield mud treatment system and shield mud treatment method

Abstract

The invention provides a shield mud treatment system, which comprises a shield waste slurry suction pump, a fully-automatic flocculant preparation and feeding system, a mud reaction pool, a concentration pool, a clear water pool and a two-stage dewatering sieve, wherein the slurry outlet of the shield waste slurry suction pump and the agent outlet of the fully-automatic flocculant preparation andfeeding system are respectively connected to the mud reaction pool, the output end of the mud reaction pool is connected to the concentration pool, the overflow port of the concentration pool is connected to the clear water pool, the underflow outlet of the concentration pool is connected to the two-stage dewatering sieve through a screw pump, the underflow reflux groove of the two-stage dewatering sieve is connected to the concentration pool, and the residue outlet of the two-stage dewatering sieve is communicated to a residue soil field. According to the present invention, the flocculant solution is automatically prepared, and is mixed with the waste slurry, and the supernatant is discharged and the underflow is subjected to dewatering residue discharge after the concentration treatment,such that the cost can be effectively reduced, the system and the method are less affected by the weather, and the shield waste slurry treatment efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of shield machine waste slurry treatment, in particular to a shield machine mud treatment system and a treatment method. Background technique [0002] my country's current urbanization process has entered the stage of accelerated urban development, and the rapid increase in urban population has led to a sharp increase in the total amount of traffic; this requires the expansion of the service scope and capabilities of the urban passenger transport system. As a result, more and more underground basic transport The facilities need to be developed and constructed, and a large amount of mud will be produced when the mud-water balance shield method is used for tunneling in subway tunnels. Since construction sites in urban areas are greatly restricted by various factors such as urban traffic, buildings, land acquisition and demolition, and environmental protection, construction sites are generally extremely compact....

AI Technical Summary

Problems solved by technology

The efficiency of this method is higher than that of sedimentation and separation, and it occupies a small area. However, due to the need to add a large amount of lime to carry out effective press filtration, the pH of the press-filtered water and mud cake is 11-12 or even higher, far exceeding the current national emission standards. Cannot meet environmental protection requirements

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