Filtration processing system and processing method of water supply plant

Abstract

The invention discloses a filtration processing system and a processing method for a water supply plant. The system comprises a settling pond, an ultrafiltration apparatus and disinfection equipment. The settling pond is provided with a raw water inlet, a stirring device is arranged in the settling pond, the bottom of the settling pond is provided with a mud discharging port, a water outlet of the settling pond is connected with the ultrafiltration apparatus and the disinfection equipment sequentially, a water outlet pipeline arranged on the ultrafiltration apparatus and connected with the disinfection equipment is provided with a back-flushing pipeline, and a washing water outlet on the bottom of the ultrafiltration apparatus is connected back to the water inlet of the settling pond through a recycling pipe. The processing system endures that the mechanical stirring settling pond organically combines the ultrafiltration processing and the disinfection processing so as to filter water in the water supply plant and the quality of yielding water is stable, thereby improving the water quality of the water supply plant to reach the new national standard of drinking water.

Description

technical field [0001] The invention relates to a water treatment technology, in particular to a filtration treatment system and treatment method used in a water supply plant, and belongs to the technical field of tap water filtration treatment. Background technique [0002] The existing waterworks filter water generally adopts the treatment scheme of mechanical agitation clarifier + V-shaped filter + disinfection. Although the investment cost of this technical solution is slightly lower, the effluent water quality of this water treatment technology fluctuates greatly, and the effluent water quality is unstable, which can no longer meet the effluent water of the newly issued "Drinking Water Sanitation Standard" (GB5749-2006) Requirements, drinking water that meets the standard cannot be obtained after treatment. [0003] The prior art also uses ultrafiltration technology in water filtration, but because ultrafiltration technology is affected by various factors, such as: ult...

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Problems solved by technology

Although the investment cost of this technical solution is slightly lower, the effluent water quality of this water treatment technology fluctuates greatly, and the effluent water quality is unstable, which can no longer meet the effluent water of the newly issued "Drinking Water Sanitation Standard" (GB5749-2006) requirements, unable to obtain standard drinking water after treatment

[0003] The prior art also uses ultrafiltration technology in water filtration, but because ultrafiltration technology is affected by various factors, such as: ultrafiltration operation mode, ultrafiltration pretreatment, ultrafiltration flocculation process, cleaning method, etc.; The flocculation process is set before the ultrafiltration, so that the operating cost of the ultrafiltration is relatively high. If the flocculation process is not used, the ultrafiltration membrane of the ultrafiltration treatment will be polluted quickly due to the poor water quality, which not only cannot guarantee the stable operation of the ultrafiltration treatment, but also increases running cost

[0004] If the water supply plant adopts the direct ultrafiltration process and ignores the pretreatment, a large amount of flocculant must be added before the ultrafiltration to maintain the stable operation of the ultrafiltration, and the water utilization rate of the entire water plant will be less than 90%. Does not meet the requirements of general water plants

However, other corresponding pretreatment short-process alternative processes cannot guarantee the complete and stable operation of ultrafiltration. The dosing and cleaning of ultrafiltration will inevitably be introduced into the ultrafiltration process, and the disinfection by-products of the ultrafiltration process will be produced. The utilization rate of ultrafiltration water will also decrease

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