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Shield excavation slag processing technology

A slag treatment and process technology, applied in the field of shield slag treatment technology, can solve the problems of low product utilization rate, long treatment time, and inability to completely separate mud and water, and achieve the effect of improving economic benefits and improving product utilization rate.

Pending Publication Date: 2019-01-22
深圳市绿锦隆环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the natural sedimentation method in the prior art has a long treatment time and cannot completely separate the mud and water, and the utilization rate of the product obtained after the mud water is solidified is low, and a shield tunneling method is proposed. Slag treatment process

Method used

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  • Shield excavation slag processing technology

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A shield slag treatment process, comprising the following steps:

[0035] 1) The muddy water is poured into the hopper, and then screened through a coarse sieve to screen out large-sized materials and small and medium-sized materials. During the screening process, heavy-duty vibrating screens are used, and heavy-duty vibrating screens use polyurethane screens. Polyurethane screens are more efficient than other types of screens The screen has a longer service life and is not easy to block holes. The large materials screened out can be stacked together and then crushed to make building aggregates. After screening out large-sized materials, it is conducive to the screening of small and medium-sized materials. The screening time is only 3 -5 seconds, the screening speed is fast, thereby increasing the subsequent sand forming time;

[0036] 2) Small and medium-sized materials are washed by high-pressure water flow. After washing, small and medium-sized materials are screened...

Embodiment 2

[0043] In the present invention, the slurry water is first poured into the hopper, and then screened with a coarse sieve to screen out large-sized materials and medium-sized and small-sized materials. For construction aggregates, the diameter of small and medium-sized materials is ≤100mm. Small and medium-sized materials are washed with high-pressure water. After washing, four sizes of materials are obtained. Materials with a size of 30mm≤d≤100mm are re-crushed, and 10mm<d<30mm, 5mm The material <d<10mm is collected as finished sand, and the material with d≤5mm is washed again. After cleaning by the double-screw sand washing machine, some muddy water flows out, and the muddy water flows into the layer sand recovery machine, and the layer sand is recovered. The machine recycles it to form fine sand, and the remaining muddy water enters the first-level sedimentation tank, the second-level sedimentation tank, and the third-level sedimentation tank for sedimentation, and settles th...

Embodiment 3

[0045] During the solidification process, a centrifugal mud compactor is used to process the mud water. The mud at the outlet of the three-stage sedimentation enters the mud compactor from the inlet of the mud compactor, and the mud is sent into the drum of the mud compactor by the hollow shaft. It consists of reloading and a screw conveyor with a hollow shaft. The mud is sent into the drum by the hollow shaft. Under the centrifugal force generated by high-speed rotation, it is immediately thrown into the drum cavity. Due to the different specific gravity, solid-liquid separation is formed. Driven by the conveyor, the conical end of the drum is continuously discharged from the first outlet; the liquid in the liquid ring layer is continuously overflowed from the weir to the outside of the drum and discharged by gravity. The pressure of the mud compactor on the mud It is 0.8MPa, and the action time is 5 minutes. The mud cake solid with a moisture content of <30% is discharged fro...

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Abstract

The invention discloses a shield excavation slag processing technology. The shield excavation slag processing technology comprises following steps: muddy water is introduced into a material hopper, and is subjected to sieving using a coarse sieve so as to obtain a large size material and a medium-small size material; the medium-small size material is subjected to flushing with high pressure waterflow, after flushing, the medium-small size material is subjected to sieving, a material obtained through sieving is subjected to flushing, muddy water obtained through flushing is subjected to fine sand recycling processing so as to obtain fine sand, muddy water is subjected to precipitation processing, after precipitation, muddy water is subjected to solidification process, and clear water and mud cake are obtained through solidification process; and the mud cake is subjected to processing. According to the shield excavation slag processing technology, muddy water is subjected to precipitation, and solidification processing, so that full utilization of muddy water is realized; clear water obtained through muddy water processing can be recycled; the obtained mud cake can be processed intoaerated concrete blocks and baking-free bricks, and product utilization rate after muddy water processing is increased.

Description

technical field [0001] The invention relates to the technical field of shield tunneling slag treatment technology, in particular to a shield tunneling slag treatment technology. Background technique [0002] With the vigorous construction of cities, the development of urban-rural integration, and the construction of urban tunnels and subways, a large amount of shield muck, construction waste, and shield muck production have increased significantly during the construction process. The number and storage capacity of the existing treatment facilities can no longer meet the requirements for the disposal of shield muck, construction waste, and shield muck at the present stage, and the phenomenon of illegal spoil still exists. In order to solve the sharp increase in the output of urban shield muck, the number and storage capacity of existing treatment facilities are insufficient, and the disposal of urban shield muck has become a difficult problem at this stage. [0003] In the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/12C02F11/14C04B18/04
CPCC02F11/00C02F11/12C02F11/121C02F11/14C04B18/0418Y02W30/91
Inventor 张勇
Owner 深圳市绿锦隆环保科技有限公司
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