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Application of immersion ultrafiltration technology
in the renovation of double-valve filter water plant

Authors： GAO Yuncheng

Units： Tangshan Water Supply Company，Tangshan 063000, China

KeyWords： double-valve filter renovation; process upgrading; immersion ultrafiltration; application; water plant

ClassificationCode：TQ028；TU991.2

year,volume(issue):pagination： 2025,45(5):172-180

Abstract：

In the process of water plant, the traditional filter has become the bottleneck of further improving the water purification capacity. It is urgent to upgrade the process. With the development of filtration technology, ultrafiltration membrane technology with obvious advantages has been more and more applied in domestic drinking water treatment. In view of the problems existing in the traditional double-valve filter tank, such as water channeling, low backwashing efficiency and poor impact resistance, taking the phase Ⅰ renovation project of the water purification plant of Tangshan Water Supply Company as an example, the immersion ultrafiltration membrane tank was used to transform the double-valve filter tank with a design scale of 125 000 m3/d into a siphon membrane system, without the need to transform the main civil structure of the original filter tank. The transformation could effectively improve the water production, the system had a high degree of integration, compact layout, strong stability, and water production turbidity was stable below 0.1 NTU, and the average water production rate was 95%. The results showed that by using the height difference between the membrane tank and the clear water tank to achieve siphonic drive, compared with the negative pressure suction and immersion ultrafiltration system, the electricity consumption per ton of water could be saved by approximately 90%. After optimizing the concentration of restorative cleaning agent (sodium hypochlorite 1 000 mg/L, citric acid 5 000 mg/L), the cost of the agent was reduced by 50% compared with the traditional method. By adjusting the backwash procedure and equipment maintenance strategy, the operation energy consumption of the system was reduced by 35%. After the transformation, the actual operation cost of water production only increased by 0.08~0.15 CNY/m3, which provides a technical reference of low cost and high stability for the process upgrading of the same type of water plant.

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AuthorIntro：

高蕴宬（1982-），男，天津人，工程师,主要研究方向为饮用水处理，E-mail：59381165@qq.com

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