AVK Collaborates with Hefei Zhongxing Water Plant to Establish a New Benchmark for Green Energy Water Supply

Under sufficient sunlight, the PV power generation system can produce over 2,000 kWh of electricity in one hour, generating more than 2 million kWh of electricity annually. This provides ample power support for the high-voltage motors in the pump house and saves operational costs by over RMB 1 million.

Project Background: Zhongxing Water Plant - Photovoltaic Water Supply Under the Concept of Sustainable Development

Meanwhile, the Hefei Zhongxing Water Plant project will greatly alleviate water demand in the region, promote interconnection and complementarity in water supply between Hefei's central urban area and Feidong County, and significantly enhance the resilience and reliability of urban water supply. Furthermore, this innovative initiative will further optimize the city's water supply structure, comprehensively improve water quality and safety standards, and inject strong momentum into Hefei's sustainable development.

The Zhongxing Water Plant is located at the northeast corner of the intersection of Yuandian Road and Zhongpai Road in Feidong County, occupying an area of approximately 189 acres. With a construction scale of 400,000 tons per day, the total investment is 1.386 billion yuan (including the raw water pumping station, water transmission and distribution pipelines, and the water purification plant). The raw water is sourced from the Zhongxing Reservoir and transported to the water purification plant through two pipelines with a diameter of 1.6 meters via the Zhongxing Raw Water Pumping Station. The plant adopts a full-flow water purification process of "pretreatment + conventional treatment + advanced treatment" to produce qualified drinking water, which is then delivered to households. The project officially commenced in June 2023 and is scheduled to be officially commissioned for water supply and operation in March 2025, adding new vitality and security to the urban water supply system.

AVK Solutions, Guarding Every Aspect of Water Supply

1.Water Intake Pumping Station: AVK High-Performance Knife Gate Valves, Tackling Severe Challenges

The water intake pumping station of the Zhongxing Water Plant project, serving as the "first water intake station" of the entire water plant, is not only the largest and most difficult individual project in terms of construction scale but also carries the vital task of water extraction. With a building area of 1,462.4 square meters, it plays a crucial role. In this key process, the valves used in the water intake and connecting pipes face unprecedented challenges: being submerged in water for a long time requires the valve design and performance to meet extremely high standards. The distance between the valve center and the electric actuator center reaches 15 meters, and the valve must possess bidirectional pressure-bearing and bidirectional sealing capabilities to ensure stable and reliable operation under any working conditions.

In response to this severe challenge, AVK leveraged its profound valve technology accumulation and innovation capability to provide a tailored solution: the WS series of large-diameter high-performance knife gate valves (DN1600-DN1800). This series of valves adopts a full stainless steel material and features bidirectional pressure-bearing, bidirectional sealing, and a design with a valve cover.

• The valve body and valve cover adopt a sturdy welded structure to ensure the valve's pressure-bearing capacity.
• The design of the knife gate valve with a valve cover ensures that the internal structure of the valve is completely isolated from external media, not only achieving maintenance-free upper sealing but also reducing the operating torque of the valve. This is particularly suitable for working environments where the valve is submerged in water for long periods.
• The guide rail grooves and wedge inside the valve body, combined with the guide rails on the valve plate, form a guiding and closing system that possesses both high-level zero leakage and bidirectional pressure-bearing sealing performance.
• The unique design effectively cuts and removes algae, weeds, and other suspended impurities in raw water, preventing clogging issues caused by impurity accumulation during valve operation and ensuring long-term stable and trouble-free operation.

2.Water Treatment Plant Filter Process: AVK Butterfly Valves Ensuring Operational Safety and Efficiency

As the final stage in reducing the turbidity of the effluent in the treatment process of the Zhongxing Water Treatment Plant, the filter's operating condition directly impacts the quality of the water leaving the plant. AVK has supplied 220 electric centerline (vulcanized seat) butterfly valves for this process section, playing a crucial role in the opening, closing, and regulation of the filters. The vulcanized rubber seat of these valves exhibits exceptional bidirectional sealing performance, ensuring robust air and water scouring intensities. This effectively mitigates the risks of air entrapment within the filters, abnormal turbidity in the effluent, and elevated total bacterial counts due to valve leakage.

Furthermore, the streamlined disc and low-friction bearing design of AVK butterfly valves ensure low water loss and dynamic operating torque, maintaining flexibility and reliability even during long-term and frequent use. This characteristic is particularly important for operating environments such as filter tanks that require frequent adjustments. Additionally, the vulcanized lining within the valve and the 316 high-grade stainless steel disc effortlessly withstand the ozone corrosion in activated carbon filters, further enhancing the overall performance of the valve.