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Sludge refluxing and flocculating precipitation tank

A sedimentation tank and sludge technology, applied in the field of flocculation sedimentation tanks, can solve the problems of unfavorable, unfavorable sludge and uniform diffusion of water treatment chemicals, achieve reasonable structure, improve flocculation reaction uniformity and reaction efficiency, and reduce consumption Effect

Inactive Publication Date: 2012-05-09
ZHEJIANG MARINE DEV RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is mainly to solve the problems in the prior art that the reflux sludge and water treatment chemicals are synchronously added into the mixing tank and mixed with raw water, which is not conducive to the uniform diffusion of sludge and water treatment chemicals in the raw water, and is not conducive to improving sludge return flow and reducing water treatment The effect of chemical consumption and the technical problem of improving the water treatment efficiency of flocculation and sedimentation, providing a sludge return flocculation sedimentation tank with good effect of reducing water treatment chemical consumption and high water treatment efficiency

Method used

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  • Sludge refluxing and flocculating precipitation tank
  • Sludge refluxing and flocculating precipitation tank
  • Sludge refluxing and flocculating precipitation tank

Examples

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Embodiment 1

[0024] Such as figure 1 As shown, the present invention includes a pipeline mixer 1, a return sludge mixer 2, a multistage flocculation unit 3, a sedimentation unit 4, a sludge collection unit 5, a sludge collection piping system 6, and a sludge return piping system 7; The raw water inlet of the flocculation unit 3 is set at the top left end of the multi-stage flocculation unit 3, and the sludge collection unit 5 communicates with the bottom of the multi-stage flocculation unit 3 and the sedimentation unit 4 through the sludge collection piping system 6; the sludge return piping system 7 The sludge suction pipe is arranged in the sludge collection unit 5; the return sludge mixer 2 includes a return sludge mixer shell and a muddy water main mixing agitator 2.1 and a second muddy water mixer 2.1 rolled on the backflow sludge mixer shell. The mixing agitator 2.2, the structure and size of the second muddy water mixing agitator 2.2 and the muddy water main mixing agitator 2.1, th...

Embodiment 2

[0028] The first difference between the second embodiment and the first embodiment lies in the difference in the structure of the stirring hand 2.1.2 on the muddy water main mixing agitator 2.1. Such as image 3 As shown, each stirring hand 2.1.2 of Embodiment 2 is composed of a stirring plate in the middle and stirring round rods symmetrically distributed on both sides of the stirring plate. The impact of the chemical mixture and the return sludge drives the mud water main mixing agitator to rotate. This structure saves materials, the moment of inertia of the mud-water main mixing agitator is small, the rotation is easy, and the mixing effect is good.

[0029] The second difference between the second embodiment and the first embodiment lies in the structure of the pipeline mixer used. Such as Figure 5 and Figure 6 As shown, the pipeline mixer 1 includes a water inlet dosing area 1.1, a water medicine mixing area 1.2, a water outlet area 1.3 and an impeller installation ...

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Abstract

The present invention relates to a flocculating precipitation tank adopted for high turbidity seawater pretreatment. In the prior art, refluxed sludge and a water treatment agent are synchronously added to a mixing tank to carry out mixing with untreated water, such that uniform diffusion and uniform mixing of the sludge and the water treatment agent are not easily performed in the untreated water. With the present invention, the problem in the prior art is solved. The flocculating precipitation tank comprises a pipeline mixer, a sludge refluxing mixer, a multi-stage flocculation unit, a precipitation unit and a sludge refluxing pipe system, wherein the sludge refluxing mixer is provided with a sludge and water mixing stirrer. During working, the untreated water and a flocculation agent are completely mixed by the pipeline mixer; the resulting mixture and the refluxed sludge enter the sludge refluxing mixer, and push the sludge and water mixing stirrer to rotate; the sludge and water mixing stirrer performed a stirring and mixing treatment for the untreated water, the flocculation agent and the refluxed sludge; the formed mixture comprising the untreated water, the flocculation agent and the refluxed sludge firstly enters the multi-stage flocculation unit, and then enters the precipitation unit to carry out the sludge and water separation. The tank of the present invention has characteristics of reasonable structure, and high water treatment efficiency of the flocculating precipitation.

Description

technical field [0001] The invention relates to the field of water treatment equipment, in particular to a flocculation sedimentation tank suitable for high turbidity seawater pretreatment. Background technique [0002] Before reverse osmosis seawater desalination and direct utilization of seawater, it is necessary to use corresponding technology to remove suspended sediment, plankton, colloid, oil and other substances in seawater. For large-scale projects, coagulation and sedimentation are still effective and stable treatment methods. The existing flocculation-sedimentation tanks generally include several processing procedures such as dosing and mixing, flocculation reaction, and sedimentation and clarification. Mixing makes the coagulant hydrolyzate diffuse rapidly, and colloidal particles destabilize and coagulate. The flocculation reaction is the growth process of tiny particles contacting and colliding. The sedimentation process is to make the alum flowers settle, and t...

Claims

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Application Information

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IPC IPC(8): B01D21/02C02F1/52
Inventor 范会生张海春王波郁小芬陆阿定孙保库孙兆栋
Owner ZHEJIANG MARINE DEV RES INST
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