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A treatment process for tunnel construction wastewater

A technology for tunnel construction and wastewater, applied in the field of water pollution control, can solve the problems of low wastewater treatment efficiency, poor treatment effect, and difficulty in meeting discharge standards, and achieve the effects of reducing transportation costs, improving treatment speed, and easy precipitation.

Inactive Publication Date: 2020-07-10
四川博渠科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing processes and equipment for tunnel construction wastewater treatment have low efficiency and poor treatment effect, making it difficult to meet discharge standards

Method used

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  • A treatment process for tunnel construction wastewater
  • A treatment process for tunnel construction wastewater
  • A treatment process for tunnel construction wastewater

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Experimental program
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Embodiment Construction

[0027] combine Figure 1-6 The shown tunnel construction wastewater treatment process mainly adopts the following equipment and facilities: grit chamber 1 , flocculation settler 3 , mud pond 4 , and sludge dewaterer 6 . The grit chamber 1 and the mud pond 4 are constructed on-site at the construction site, and concrete pond bodies are usually used. After the flocculation settler 3 and the sludge dewatering machine 6 are manufactured, they are assembled at the tunnel construction site. The grit chamber 1, the flocculation-settler 3, the mud pond 4, and the sludge dewatering machine 6 can all adopt existing conventional settings or commercially available conventional models, such as the grit chamber 1 is a simple rectangular tank body with one end The water inlet is set, and the first pump machine 2 is set at the other end. The tunnel construction waste water is passed into the grit chamber 1 through the water inlet, and then undergoes natural sedimentation, and is finally pum...

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Abstract

The invention relates to the technical field of water pollution management and aims at providing a tunnel construction wastewater management technology capable of effectively improving the wastewatermanagement efficiency. According to the technical scheme provided by the invention, the tunnel construction wastewater management technology comprises the following steps: A, first-grade natural sedimentation treatment: introducing wastewater into a grit chamber; in a flowing process of the wastewater, naturally precipitating to primarily remove large-particle impurities in the wastewater; B, prepositioned flocculation and post-positioned coagulation-supporting treatment: pumping the wastewater subjected to the first-grade natural sedimentation treatment into a flocculation and sedimentation device by utilizing a first pump; adding a flocculation agent into the wastewater; after forming a primary flocculation body, adding a coagulation-supporting agent into the wastewater, and carrying outnet fishing and bridging to form the flocculation body with a larger grain size, which is easier to precipitate; C, second-grade natural sedimentation treatment; D, sludge concentration treatment; E,sludge dehydration treatment. According to the tunnel construction wastewater management technology, the treatment speed and the treatment effect of tunnel construction wastewater can be extremely improved.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a process for treating wastewater from tunnel construction. Background technique [0002] With the economic development and the needs of daily traffic, the amount of tunnel construction has increased sharply. Most of the tunnel projects are located in mountainous or hilly areas. During the construction process, a large amount of construction wastewater will be generated. If it is not treated and discharged directly, it will be serious. impact on the ecological environment of the construction site. The sources of wastewater during tunnel construction mainly include the following: water gushing generated when the tunnel passes through unfavorable geological units. Wastewater discharged from construction drilling rigs, shield tunneling machines, etc. Water used for dust reduction after tunnel blasting and slag removal. During the construction of the tunnel, a larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F11/121C02F11/13
CPCC02F1/5236C02F1/56C02F1/66C02F9/00C02F11/12C02F11/121C02F2001/007
Inventor 李科杨永见
Owner 四川博渠科技有限责任公司
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