System and technology used for tunnel construction wastewater treatment

A technology for tunnel construction and wastewater treatment, which is applied in water/sewage treatment, oxidized water/sewage treatment, multi-stage water/sewage treatment, etc. It can solve the differences in wastewater quality, water quantity and pollutant types, and it is difficult to meet the needs of tunnel construction wastewater treatment , single technology and other issues to achieve the effect of reuse, cost saving and water saving

Pending Publication Date: 2019-07-19
CHINA RAILWAY ENVIRONMENTAL TECH ENG CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0014] At present, new high-efficiency sedimentation processes such as high-density process, sand coagulation process, and magnetic coagulation process have also appeared on the market, but they have not been widely used in the treatment of tunnel construction sewage, and due to different tunnel geological conditions, construction methods, etc. There are differences in wastewater quality, water volume, and pollutant types. It is difficult for a single technology to meet the treatment needs of tunnel construction wastewater in different regions.

Method used

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. For the convenience of description, if the words "up", "down", "left" and "right" appear in the following, it only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure.

[0036] Such as figure 1 As shown, the system for wastewater treatment in tunnel construction includes a first dosing tank 1, a first pump 13 connected in sequence, a first valve 21, a first pipeline mixer 26, a first reaction tank 6, and a second reaction tank 7 and the sedimentation tank 8, the outlet of the first pipeline mixer 26 communicates with the bottom of the first reaction tank 6; also includes the second valve 22, the medium dosing tank 5, the second pump 18 and the seco...

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Abstract

The invention relates to a system and a technology used for tunnel construction wastewater treatment. The system comprises a first dosing tank, as well as a first pump, a first valve, a first pipelinemixer, a first reaction tank, a second reaction tank and a settling pond which communicate with one another, wherein a discharge hole of the first pipeline mixer communicates with the bottom of the first reaction tank. The system also comprises a second valve, a medium addition tank, a second pump and a second pipeline mixer which communicate in sequence, wherein a pipeline between the first pumpand the first valve communicates with an inlet of the second valve; and the first dosing tank communicates with the first pipeline mixer and the second pipeline mixer respectively. The system can bewidely applicable for different water quality conditions of tunnel construction wastewater generated by the difference of geological conditions, and the wastewater treatment requirement in different areas along the railway is met in all directions.

Description

technical field [0001] The invention relates to a system and a process for treating wastewater in tunnel construction, and belongs to the technical field of sewage treatment. Background technique [0002] During the construction of railways in mountainous areas, there are many bridges and tunnels in the line design, and the proportion of bridges and tunnels is high. The construction of the tunnel project is likely to bring many impacts on the local natural ecological environment, such as environmental pollution, water pollution, soil erosion, vegetation destruction and other natural ecological problems. [0003] The main sources of wastewater during tunnel construction are as follows: [0004] (1) Waste water generated by excavation. The external circulation cooling water used in the TBM excavation process is taken from the nearby river channel and transported to the TBM equipment through pipelines. The cooling water is directly discharged outside after heat exchange. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12
CPCC02F9/00C02F2001/007C02F1/72C02F1/48C02F1/38C02F1/283C02F1/56C02F1/5236C02F5/00
Inventor 刘东斌陈亚利言海燕曹文娟徐德良田滨王喜黄沧
Owner CHINA RAILWAY ENVIRONMENTAL TECH ENG CO LTD
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