Application of Vertical Long Axis Semi submersible Turbine Pump Solution in Municipal Water Supply and Drainage Industry

The vertical long axis semi submersible turbine pump is a core adaptive equipment in the field of municipal water supply and drainage. Through customized structural design, it can meet the core needs of water intake, water transmission, and drainage in municipal water supply and drainage scenarios. Vertical long axis semi submersible turbine pumps are widely used in the field of municipal water supply and drainage. With the design of vertical suction inlet and horizontal outlet, they are suitable for deep water level extraction needs. They can also achieve functions such as automatic start stop and overload alarm of liquid level through intelligent control cabinets. The single foundation installation also greatly reduces the construction and maintenance costs of municipal engineering. ‌
Main application scenarios
Urban water intake and supply: extracting raw water from rivers, reservoirs, and deep underground water layers and transporting it to water treatment plants, as well as pressurized water supply to high-rise buildings and long-distance pipelines; Its long axis structure allows the pump body to penetrate deep into low water levels for water intake, and multi-stage impellers achieve high-pressure water delivery, meeting the water supply needs of large-span cities.
Flood control and waterlogging drainage: the pumping and drainage of rainstorm accumulated water in urban low-lying areas, tunnels underneath, and drainage pipe networks can quickly start the pumping and drainage of large flow to reduce the risk of urban waterlogging.
Wastewater treatment reuse: The sludge reflux and raw water lifting of the wastewater treatment plant can stably transport wastewater containing suspended solids and fibers, which is not easily blocked and provides stable pressure for subsequent membrane treatment processes.
Targeted solutions
Structural adaptation: Adopting a vertical suction inlet+horizontal outlet, motor direct connection design, single foundation installation occupies a small area and is suitable for compact spaces in municipal pump rooms; The length of the water lifting pipe can be adjusted according to the depth of water intake (covering 3-20 meters of underwater depth) to meet the water intake needs of different water levels.
Optimization of operating conditions: When transporting raw/clean water, the protective pipe can be removed, eliminating the need for external lubrication water and reducing installation and operating costs; Install protective pipes and self closing sealing systems when transporting sewage/sludge to prevent sewage from entering the guide bearings after shutdown and extend the service life of components.
Intelligent matching: Optional liquid level linkage control cabinet, realizing automatic start stop, overload alarm and remote monitoring based on water level, reducing manual duty, and improving the response efficiency of urban drainage and flood prevention.
Typical scenario application plan
1. Municipal water supply and intake project
Taking water sources with high sediment content such as the Yellow River and Yangtze River as an example:
Adopting an imported vertical long shaft semi submersible turbine pump with a filter screen, the filter screen has a reasonable opening, which can filter out large particle impurities and reduce inlet head loss, thereby improving pump efficiency.
The core components adopt ceramic particle wear-resistant coating technology, which significantly reduces sediment wear, prolongs equipment service life, and reduces operation and maintenance costs.
2. Urban emergency flood control and drainage
For large-scale waterlogging scenarios in low-lying areas:
The vertical long shaft semi submersible turbine pump adopts a multi-stage impeller design model, with a maximum head of 300m and a stable flow rate of over 380m ³/h, covering large-scale drainage needs.
Paired with an intelligent control system, the pump speed can be automatically adjusted according to the accumulated water level, achieving precise drainage, avoiding ineffective energy consumption, and discharging a large amount of accumulated water in a short period of time.
3. Drainage from sewage treatment plants
Regarding sewage transportation in sewage treatment plants:
The vertical long shaft semi submersible turbine pump adopts a withdrawable rotor design, combined with an external cooling and lubrication system, which facilitates disassembly and maintenance in the later stage and reduces maintenance difficulty.
The guide bearing is made of reinforced filled polytetrafluoroethylene or Sailong material, which is wear-resistant, corrosion-resistant, and suitable for the characteristics of sewage media.
Typical application cases
Yellow River Water Intake Project in Wuhai High tech Zone
The Wuhai Economic Development Zone Low Carbon Industrial Park is adjacent to the Yellow River, which has a high sediment content and strict requirements for the wear resistance of water intake equipment. The project uses a vertical long axis semi submersible turbine pump as the main equipment. For the Yellow River water intake condition, the pump body adopts spray ceramic particle wear-resistant coating technology. This technology has low surface roughness and high wear resistance, which not only improves the efficiency of the water pump but also significantly reduces operating costs. After the water supply project is completed in the second quarter of 2023, it will provide production and domestic water for the park, becoming an important component of the water supply system in Wuhai City.
Urban emergency flood control and drainage
During the flood season, low-lying areas in a certain city are prone to water accumulation and require rapid and efficient drainage. The vertical long axis semi submersible turbine pump is selected as the core equipment for emergency drainage. The pump adopts a multi-stage impeller design, with a head of up to 300 meters and a stable flow rate of 380m ³/h, which can cover the drainage needs of large low-lying areas. The core components are equipped with wear-resistant coatings to resist sediment wear, coupled with an intelligent control system that can automatically adjust the pump speed according to the water level, achieving precise drainage and avoiding ineffective energy consumption. A large amount of accumulated water can be discharged in a short period of time, ensuring the normal operation of urban transportation and residents' lives.
Emergency Drainage Cases of 12 Along River Drainage Pumping Stations in the Songhua River Basin, including Zhengyang River in Harbin City
Twelve pumping stations along the Zhengyang River in Harbin need to be upgraded to a once-in-a-century flood control and drainage standard to cope with complex working conditions such as high cold, high humidity, and high load, ensuring the city's flood control capacity and reducing the risk of waterlogging. The vertical long axis semi submersible turbine pump is selected as the core drainage equipment, combined with heavy-duty submersible sewage pumps and submersible sewage pumps to form a customized drainage system. The vertical long axis pump adopts an efficient hydraulic model, and 5 devices cover different flow scenarios, which improves the drainage efficiency by 30% compared to old equipment; The pump body adopts optimized flow channel structure and wear-resistant and corrosion-resistant materials, which can adapt to complex medium environments and have the ability to accurately pump and discharge as needed. It can also be combined with intelligent control systems to achieve remote monitoring, automatic start stop and other functions. After the equipment update, the pump station can meet the flood control and drainage requirements of a once-in-a-century urban flood, greatly improving the emergency drainage capacity of the pump station.