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Sawing and grinding wastewater ultrafiltration membrane (UF)-recovery and treatment system

A technology for grinding wastewater, recycling and treatment, applied in the direction of osmosis/dialysis water/sewage treatment, etc., which can solve the problems of high installation cost, complicated equipment, and difficult treatment

Inactive Publication Date: 2011-05-25
SHANGHAI HANHUA WATER TREATMENT ENG CO LTD
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Problems solved by technology

[0003] In these electronics-related industries, the treatment of chip cutting and grinding wastewater is not easy because it contains extremely fine powder particles. At the same time, the cost of wastewater treatment is quite staggering, and the recovery rate is not high.
Traditionally, UF membranes are used to treat grinding wastewater, and cross-flow filtration (Cross Flow) is used for filtration (such as figure 1 shown), but because the equipment using the cross-flow filtration (Cross Flow) method is relatively complicated, the installation cost is high, and the recovery rate cannot be too high, and because the flow direction of the wastewater A is parallel to the UF membrane B, the suspension in the wastewater Particles C and silicon powder D will not only cause blockage of the UF system, but also scratch the UF filter membrane, resulting in a shortened life of the UF silk membrane (the service life is only about one year), and the service life of the overall recovery system will also be relatively shortened. Economical

Method used

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  • Sawing and grinding wastewater ultrafiltration membrane (UF)-recovery and treatment system
  • Sawing and grinding wastewater ultrafiltration membrane (UF)-recovery and treatment system
  • Sawing and grinding wastewater ultrafiltration membrane (UF)-recovery and treatment system

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Embodiment Construction

[0027] The UF recovery and treatment system of the cutting and grinding wastewater of the present invention, such as figure 2 As shown, the cutting and grinding waste water is filtered by a dead-end filter system. The full-flow filter system is vertical to the water inlet direction A1 and the UF membrane B1, and cooperates with regular automatic water washing, air washing and chemical washing. The mechanism maintains a better filtration state of the UF membrane, which can increase the recovery rate of wastewater to more than 90%.

[0028] The UF recovery and treatment system of the cutting and grinding wastewater of the present invention, such as image 3 As shown, the UF recovery treatment system includes: cutting waste water recovery storage tank 100, grinding waste water recovery storage tank 101, self-priming barrel 102, UF water inlet pump 103, primary filter module 104, CDA buffer tank 105, UF filter 106, UF Produced water storage tank 107, RO water supply pump 108, UF...

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Abstract

The invention discloses a sawing and grinding wastewater ultrafiltration membrane (UF)-recovery and treatment system, which adopts a dead-end filtration system, utilizes a vertical hollow fibrous membrane and combines periodical water-washing, gas-washing and medicament-washing mechanisms so as to increase the recovery rate under low setting cost and low loss in a simple flow, and prolong the service life of the UF membrane.

Description

technical field [0001] The invention relates to a UF recovery and treatment system for cutting and grinding wastewater, especially to improve the recovery rate and the service life of the UF membrane under low installation cost and low loss. Background technique [0002] In industries related to electronic manufacturing, such as the IC packaging industry, wafer cutting (Wafer Saw) and wafer back grinding (Wafer Back Grinding) are all washed with ultra-pure water, which also produces a large amount of cutting and grinding wastewater. . [0003] In these electronics-related industries, the treatment of chip cutting and grinding wastewater is not easy because it contains extremely fine powder particles. At the same time, the cost of wastewater treatment is quite staggering, and the recovery rate is not high. Traditionally, UF membranes are used to treat grinding wastewater, and cross-flow filtration (Cross Flow) is used for filtration (such as figure 1 shown), but because the...

Claims

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Application Information

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IPC IPC(8): C02F1/44
Inventor 林壮恭
Owner SHANGHAI HANHUA WATER TREATMENT ENG CO LTD
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