High-concentration waste shield slurry treating system and method

Abstract

The invention discloses a high-concentration waste shield slurry treating system and method. The system comprises a vibrating screening device, a flocculation basin, an O-shaped mixing pipe and a centrifugal separating device, wherein an inlet of the vibrating screening device is connected with a shield tunneling machine through a slurry draining pipe; an outlet of the vibrating screening device is connected with the flocculation basin; a flocculating agent is added into the flocculation basin so as to realize the flocculation of the slurry; the flocculated slurry is connected with the O-shaped mixing pipe through a slurry pipe; the O-shaped mixing pipe has a function of twice mixing the flocculated slurry; the mixed slurry flows out of the outlet of the O-shaped mixing pipe and then enters into the centrifugal separating device; the centrifugal separating device is used for separating the slurry; and the separated clean water can be reused for circulating the slurry, so that the water waste is reduced. The slurry treating system fully considers the environment-friendly concept, reutilizes the waste slurry, reduces the environmental pollution caused by the waste slurry, occupies less area and saves the construction cost.

Description

technical field [0001] The invention relates to the field of muddy water treatment in shield tunneling, in particular to a shield tunneling high-concentration waste mud treatment system and method. Background technique [0002] In many mud-water shield constructions, the mud discharged from the slurry discharge pipe after mud-water circulation is treated as waste due to its high concentration and difficulty in reuse. The waste mud not only pollutes the environment but also increases the project cost. In order to reuse the mud, in some existing technologies, the high-concentration waste mud is passed through multiple sedimentation tanks for multiple sedimentation to reduce the mud concentration, and then the low-concentration mud is discharged into the slurry tank, where the adjustment meets the project The required mud is for engineering use. However, it is very slow to reduce the concentration only by the sedimentation of the mud itself, and the construction of the sedimen...

AI Technical Summary

Problems solved by technology

However, it is very slow to reduce the concentration by only relying on the sedimentation of the mud itself, and the construction of the sedimentation tank takes up a large amount of ground space, and this method is not applicable when the shield excavation is fast and requires a large amount of mud

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