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An integrated environmental protection treatment system for shield dregs

A technology for environmental protection and dregs, applied in chemical instruments and methods, solid separation, wet separation, etc., can solve the problems of waste of inorganic raw materials, prone to landslides, landslides, land and resources damage, etc., to improve sand washing accuracy and efficiency. efficiency, improving the quality of finished sand washing, and improving the efficiency of slag treatment

Active Publication Date: 2022-07-29
CHINA RAILWEY ENG SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the treatment method for the shield muck is to directly transport it to the storage yard. Due to the high water content of the shield muck, the transportation efficiency of this method is low, and it is easy to spill and pollute the road during the transportation. Therefore, the local government and the environmental protection department Strict restrictions on the discharge of soil, and the problem of muck discharge is a major factor restricting the normal progress of shield tunneling construction; a large amount of high-water-content muck piled up in subway construction will waste a lot of land resources, occupy a large-scale cultivated land, and water-containing dregs The accumulation of soil is unstable, prone to disasters such as landslides and landslides, and is also one of the main sources of dust pollution. The liquid leaching of muck will also cause serious pollution to the water resources near the storage yard.
At the same time, shield muck contains a large amount of available inorganic raw materials. The current treatment method is not only a pollution to the environment, damage and waste of land resources, but also a waste of these inorganic raw materials, which seriously hinders the sustainable development of society.

Method used

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  • An integrated environmental protection treatment system for shield dregs
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  • An integrated environmental protection treatment system for shield dregs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] An integrated environmental protection treatment system for shield slag includes a regulating slag pit 1 for storing shield slag, the regulating slag pit 1 is connected with a feeder 2 through a feeding device, and the feeder 2 is far away from One side of the feeding device is connected with a vibrating screen 3, and the bottom of the vibrating screen 3 is fixedly connected with a multi-stage sand washing device through the under-screen chute 4, and the side of the multi-stage sand washing device away from the under-screen chute 4 is connected with a The dewatering screen 5, the dewatering screen 5 and the multi-stage sand washing device are respectively connected with the sand washing overflow pool 6, and the sand washing overflow pool 6 is connected with several cyclones 7 through a pressurized pump. The overflow ports of 7 are respectively connected with a liquid separation box 8, the liquid outlet of the liquid separation box 8 is fixedly connected with several floc...

Embodiment 2

[0062] The feeding device includes a bucket wheel reclaimer 16, a large-angle belt conveyor 17 and a screening device 18. One end of the bucket wheel reclaimer 16 is located in the adjustment slag pit 1, and the The other end is set above the screening device 18 , one end of the high-angle belt conveyor 17 is set at the discharge port of the screening device 18 , and the other end of the high-angle belt conveyor 17 is connected to the feeder 2 .

[0063] When the slag is dry, low in water content and poor in fluidity, a bucket wheel reclaimer is used to reclaim the slag. The cost of a bucket wheel reclaimer is low. The power of the bucket wheel reclaimer is 60KW. The hoist assists the bucket wheel reclaimer to work within 60° in the horizontal direction and 20° in the vertical direction. The reclaiming depth is 2.75m from the plane where the muck pit is located. Within one hour, the bucket wheel reclaimer transports 200m3 of muck, and the muck passes through The screening devi...

Embodiment 3

[0075] The multi-stage sand washing device includes a first sand washing machine 14 and a second sand washing machine 15. The first sand washing machine 14 is connected to the underscreen chute 4 through a feeding mud pipe. The first sand washing machine 14 One end away from the feeding mud pipe is connected to the second sand washer 15 through the No. 1 logistics chute 19 , and the end of the second sand washer 15 away from the first sand washer 14 passes through the No. 2 logistics chute 20 The dewatering screen 5 is fixedly connected, and the dewatering screen 5, the first sand washing machine 14 and the second sand washing machine 15 are respectively connected with the sand washing overflow pool 6, and the interior of the sand washing overflow pool 6 is fixed. A stirring device 21 is provided.

[0076] The screening mud flows from the underscreen chute 4 to the feeding mud pipe and passes into the first sand washing machine 14 , and passes through the first sand washing ma...

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Abstract

The invention discloses an integrated environmental protection treatment system for shield slag, belongs to the technical field of shield construction, and solves the problem of unsatisfactory treatment and recovery effect of shield slag in the prior art. Screening, sand washing, swirling, sand washing again, flocculation, pressure filtration, flocculation, etc., to obtain coarse sand, fine sand, mud cake and water, meet the requirements of material reuse and outbound transportation, and realize the reduction of shield muck It has the characteristics of integrated layout, modular installation, industrial production and intelligent control; the present invention has strong adaptability, and the system has multi-level configuration, multi-level accessories and various layout forms. It can meet the requirements of different projects on processing capacity, processing capacity, site layout and geological conditions.

Description

technical field [0001] The invention belongs to the technical field of shield tunnel construction, in particular to an integrated shield tunnel slag environmental protection treatment system. Background technique [0002] Shield machines are widely used in urban subway construction due to factors such as safety, high construction efficiency, low cost and a wide range of applicable strata. At the same time, due to reasons such as the formation of water and the addition of bentonite during the excavation process, the slag transported during the shield construction process contains a lot of water, even in a semi-fluid state. [0003] At present, the treatment method for shield slag is to be directly transported to the yard. Due to the high water content of shield slag, the transportation efficiency of this method is low, and it is easy to spill and pollute the roads during transportation. The discharge of soil is strictly limited, and the problem of slag discharge is a major f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B9/00
CPCB03B7/00B03B9/00
Inventor 刁鹏李恒陈鑫段文军刘光鑫高旭东梅元元郑军
Owner CHINA RAILWEY ENG SERVICE CO LTD
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