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Immersion type ultra-filtration system

An ultrafiltration system and immersion technology, applied in the field of water treatment, can solve the problems of increasing project land occupation, construction cost, operation and maintenance costs, etc., and achieve the effect of saving project area, strong pollution holding capacity, and improving recovery rate.

Inactive Publication Date: 2014-02-12
TORAY ADVANCED MATERIALS RES LAB CHINA
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  • Claims
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Problems solved by technology

The water quality of this reuse process is better, but it is necessary to build a special backwash water reuse system outside the original production system, thus increasing the project's land occupation, construction cost and future operation and maintenance costs

Method used

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  • Immersion type ultra-filtration system
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Embodiment 1

[0027] A water plant with a treatment scale of 400,000m 3 / d, the raw water is surface water, of which COD Mn It is 4mg / L, and the turbidity is 20NTU. The specific treatment process is as follows: the prepared coagulant is added to the 15cm upstream of the suction port of the self-priming ultrafiltration water inlet pump, and then enters the submerged ultrafiltration membrane pool. The coagulant is polyaluminum chloride. 2mg / L (calculated as aluminum). The ultrafiltration membrane is PVDF submerged ultrafiltration, the membrane pore size is 0.01 micron, and the membrane area is 20m 2 , The ultrafiltration membrane flux is 2.0m / d.

[0028] The operation mode of the ultrafiltration membrane is backwashing and air scrubbing after every 30 minutes of filtration. Among them, the backwashing water volume is 2.2m / d, and the washing time is 1min. The backwashing water enters the backwashing recovery through the backwashing outlet on the submerged membrane pool In the adjustment ta...

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Abstract

The invention discloses an immersion type ultra-filtration system. According to the immersion type ultra-filtration system, a coagulant is added into a water suction opening of an immersion type ultra-filtration membrane water inlet pump; raw water added with the coagulant enters an immersion type ultra-filtration membrane tank to be filtered. According to the immersion type ultra-filtration system, a combined process of online coagulation and an immersion type ultra-filtration membrane is adopted; meanwhile, ultra-filtration membrane backwashing water returns back to a raw water pipeline to be recycled. A sludge discharging groove is formed in the bottom of the immersion type ultra-filtration system so that sludge can be discharged at fixed period to ensure the stable operation of immersion type ultra-filtration. According to the system, the recycling of the ultra-filtration backwashing water is realized on the basis of not additionally arranging a treatment structure, so that the recycling rate of the whole system is improved, and the initial investment and the operation cost of the system are reduced.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a submerged membrane filtration system. Background technique [0002] At present, the production wastewater of waterworks mainly includes sludge discharge water from sedimentation tanks or clarification tanks and backwash water from filters, and the total water volume can account for 3% to 7% of the daily water production of the entire waterworks. Reusing this part of water can not only save water resources, improve the operation capacity of waterworks, but also reduce the discharge of wastewater, especially for waterworks with poor wastewater discharge conditions. At present, the production wastewater of domestic waterworks is usually only concentrated in the concentration tank and then directly discharged into the water body. This not only silts up the river bed, blocks the waterway, but also causes serious water pollution. Therefore, in recent years, the recovery of...

Claims

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Application Information

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IPC IPC(8): B01D61/18C02F1/44
Inventor 常春邹高辉杨瑜芳
Owner TORAY ADVANCED MATERIALS RES LAB CHINA
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