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Method for treating residual water for dredging and device therefor

A water treatment and residual water technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of few dredging residual water treatment measures, environmental risks of chemical treatment and high overall cost, and achieves fast and obvious treatment effect without environmental protection. Effects of risks, economic and environmental risks

Inactive Publication Date: 2006-12-27
SHANGHAI INVESTIGATION DESIGN & RES INST
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  • Abstract
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AI Technical Summary

Problems solved by technology

Chemical treatment has certain environmental risks and the overall cost is high, and it is rarely used as a separate dredging residual water treatment measure in actual projects

Method used

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  • Method for treating residual water for dredging and device therefor
  • Method for treating residual water for dredging and device therefor
  • Method for treating residual water for dredging and device therefor

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with example:

[0023] The method for treating residual dredging water comprises the steps of making the dredged residual water pass through a sludge discharge tank, a mixing tank, and a clarifier in sequence, and the sludge discharge tank is provided with a first partition and a second partition, and the first partition and the second partition are The plate is perpendicular to the direction of the water flow, so that the flow direction of the water flow in the sludge discharge tank is "N" shape, so as to increase the flow time of the dredged residual water in the sludge discharge tank and fully settle the solid particles; the dredged residual water enters from the sludge discharge tank through the conduit Mixing tank, when the dredged residual water enters the mixing tank, the spraying device sprays PAC flocculant evenly on the dredged residual water, and then the dredged residual water enters the mix...

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Abstract

The invention discloses a residual dredging water disposing method and device, which comprises the following steps: making residual dredging water flow mud discharge pool, mixing pool, cleaning pool; sedimenting solid particle of residual dredging water in the mud discharge pool; putting water in the PAC flocculant evenly; reserving the disposed residual dredging water in the cleaning pool to clean suspension and other pollutant; draining upper layer of clear water. The invention reduces residual dredging water SS density and additional PAC flocculant, which makes residual dredging water reach need of environment discharge.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a treatment method for dredging residual water and an implementation device thereof. Background technique [0002] In river course and lake treatment projects, dredging residual water treatment has become an important content. In recent years, there are mainly physical methods, biological methods and chemical methods for domestic waste water treatment, and some beneficial exploration and research have been done on these methods, but a set of economical, efficient and operable methods has not yet been formed. The reasons are: [0003] 1. The physical treatment method mainly utilizes the natural sedimentation performance of particulate matter, and achieves the purpose of removing SS and other pollutants by controlling the residence time of dredging residual water, the effective water depth from the mud-water interface to the water surface, and the flow rate. The physical treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 张选岐冉光兴曹卉
Owner SHANGHAI INVESTIGATION DESIGN & RES INST
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