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A treatment device and method for high-COD waste water containing fine silicon powder

A wastewater treatment and fine silica fume technology, which is applied in energy wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of complex treatment unit, poor water outlet effect, and large floor area , to achieve the effect of efficient degradation of COD, fast removal speed and small footprint

Active Publication Date: 2019-03-05
江苏中宜金大环保产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing treatment technology that it is difficult to remove fine silicon powder particles and the shortcomings of poor COD degradation, the present invention provides a high COD fine silicon powder wastewater treatment device and treatment method, which can remove fine silicon powder particles and efficiently degrade COD, at the same time solves the problems of complex traditional treatment units, large footprint, poor water outlet effect, and serious membrane clogging

Method used

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  • A treatment device and method for high-COD waste water containing fine silicon powder
  • A treatment device and method for high-COD waste water containing fine silicon powder
  • A treatment device and method for high-COD waste water containing fine silicon powder

Examples

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Embodiment 1

[0023] A kind of high COD waste water treatment device containing fine silicon powder of the present embodiment, such as figure 1 As shown, it includes regulating tank 1, coagulation tank 2, inclined plate sedimentation tank one 3, hydrolytic acidification tank 4, inclined plate sedimentation tank two 5, split MBR6 and mud storage tank 7 connected in sequence along the water flow direction. A lifting pump 14 is arranged between the pool 1 and the coagulation tank 2, and the wastewater in the regulating tank 1 is pumped into the coagulation tank 2 through the lifting pump 14.

[0024] The inside of the coagulation tank 2 is provided with a PAC dosing and mixing zone 8 , a PAM dosing and mixing zone 9 and a coagulation reaction zone 10 in sequence along the water flow direction.

[0025] The inclined plate sedimentation tank one 3 is connected to the mud storage tank 7 through a pipeline, and a sludge pump one 16 is arranged between the inclined plate sedimentation tank one 3 an...

Embodiment 2

[0038] The difference between this embodiment and Example 1 is: the stirring time of the wastewater in the regulating tank 1 is 7h; the pH of the wastewater entering the coagulation tank 2 is 6, and the residence time in the coagulation tank 2 is 30min; The effective residence time of plate sedimentation tank-3 is 2.5h; the total residence time of wastewater in split MBR 6 is 18h.

Embodiment 3

[0040] The difference between this embodiment and Example 1 is that the stirring time of the wastewater in the regulating tank 1 is 9 hours; the pH of the wastewater entering the coagulation tank 2 is 9, and the residence time in the coagulation tank 2 is 50 min; The effective residence time of plate sedimentation tank-3 is 3.5h; the total residence time of wastewater in split MBR 6 is 22h.

[0041] Processing effect:

[0042]

[0043]

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Abstract

The invention discloses a high-COD (Chemical Oxygen Demand) fine-silicon-powder-containing wastewater treatment device and method. The device comprises an adjusting tank (1), a coagulating tank (2), an inclined plate sedimentation tank I (3), a hydrolytic acidification tank (4), an inclined plate sedimentation tank II (5), a splitting type MBR (Membrane Biological Reactor) (6) and a mud storage tank (7), which are connected in sequence along a water flow direction, wherein the inclined plate sedimentation tank I (3) is connected with the mud storage tank (7) through a pipeline; a reflowing pipeline I is arranged between the inclined plate sedimentation tank II (5) and the hydrolytic acidification tank (4); the inclined plate sedimentation tank II (5) is connected with the mud storage tank (7) through a pipeline. The high-COD fine-silicon-powder-containing wastewater treatment device can be used for effectively removing fine silicon powder particles and degrading COD; the device has a simple treatment unit, a small occupied area and good water discharging effect, and a membrane is not easy to block.

Description

technical field [0001] The invention relates to a treatment device and method for high COD waste water containing fine silicon powder, belonging to the field of industrial waste water treatment. Background technique [0002] Polysilicon is a key basic material for the manufacture of integrated circuits and photovoltaic solar energy, and an important cornerstone for the development of the national information industry and new energy industries. However, in the production process of the polysilicon industry, a large amount of industrial wastewater with complex components is produced, and most of them are collected separately and classified for treatment. Among them, cutting and grinding wastewater and cleaning wastewater contain a large amount of wire cutting fluid, silicon carbide and silicon powder, etc. The silicon powder particles are very small, and even after standing for more than half a year, only a few large particles are deposited at the bottom, and most of the fine ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCY02W10/37
Inventor 张子种戴美新吴启威
Owner 江苏中宜金大环保产业技术研究院有限公司