A mud-water separation method for waste mud of underground diaphragm wall

Abstract

The invention discloses a mud-water separation method of waste slurry of an underground diaphragm wall. The mud-water separation method is characterized by comprising the following steps of preliminarily separating large-particle slag in the waste slurry by a swirler, supplying the preliminarily separated waste slurry to a high-speed rotating centrifuge and simultaneously supplying a mud-water separation preparation solution to the centrifuge to sufficiently mix the waste slurry and the mud-water separation preparation solution and gather flocculating solid particles, and performing mud-water separation on the waste slurry by the action of a centrifugal force of the centrifuge. The mud-water separation method has the advantages that the mud-water separation method is simple; the mud-water separation of the waste slurry can be thoroughly realized; separated reclaimed water can reach a sewage discharge standard; the water content of separated dry soil is less than 30%; and an outward earthwork transport standard of a slag car is reached.

Description

technical field [0001] The invention belongs to the technical field of mud treatment, and in particular relates to a mud-water separation method for waste mud of an underground continuous wall. Background technique [0002] With the development of urban infrastructure, more and more underground diaphragm walls are used as the enclosure structure of the foundation pit. During the construction of the underground diaphragm wall, a large amount of mud is required to protect the wall. In the first underground diaphragm wall trench The new mud retaining wall is used during the construction period, and the recycled mud is used to separate large particles of muck through the cyclone desander and then recycled when the underground diaphragm wall is formed into grooves. When the mud reaches a specific gravity of 1.3 and a viscosity of more than 30s, it needs to be discarded. [0003] Therefore, a large amount of waste mud will be produced in the construction of the underground diaphra...

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Problems solved by technology

[0003] Therefore, a large amount of waste mud will be produced in the construction of the underground diaphragm wall. At present, the waste mud in the city is directly discharged into the sewage pipe or transported outside the city and dumped into the ditch or fish pond. Because the mud contains polymer Materials, the current treatment method causes great pollution and damage to the environment, and the cost of mud transportation is very high

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