HMPP Integrated Pump Station with High Modulus Polypropylene and PLC SCADA Control for Municipal Drainage with 50~70 Years Lifespan

With the accelerating urbanization and the in-depth advancement of rural revitalization, the demand for efficient, environmentally friendly and durable drainage and sewage treatment equipment is increasing day by day. HMPP integrated pumping station for municipal drainage and prefabricated pumping station for rural sewer, as two core equipment in the field of water treatment, are tailor-made for different application scenarios, effectively solving the points of urban and rural drainage and sewage discharge, and providing strong support for the construction of ecological civilization.

HMPP integrated pumping station for municipal drainage is a new generation of buried integrated prefabricated pumping equipment, which takes High Modulus Polypropylene (HMPP) as the core material and integrates multiple functions into one through factory prefabrication. Different from traditional concrete and FRP pumping stations, the HMPP cylinder of this pumping station is formed by automatic numerical control three-layer winding, which is seamless and integrated, completely eliminating the hidden danger of leakage caused by splicing seams. The material has excellent physical and chemical properties, with a bending modulus of more than 1800MPa and a ring stiffness of SN25~SN32, which can withstand the pressure of underground soil, groundwater lateral pressure and fluid impact, and is not easy to crack or deform even when buried deeply for a long time. It has extremely strong corrosion resistance, can tolerate the erosion of media with pH value of 0.5~14, and is not affected by sewage, acid-base, salt and other substances, realizing lifelong no corrosion maintenance.

In terms of structural design, the HMPP integrated pumping station is highly integrated, including submersible sewage pumps (usually one for use and one for standby, or two for use and one for standby), crushing grids or basket grids, built-in pipelines, flanges, check valves, intelligent PLC control systems, ventilation and deodorization systems, manhole covers and self-cleaning anti-silting bases, which are fully pre-installed before leaving the factory and can be directly hoisted and backfilled on site. For municipal drainage scenarios with large flow fluctuations, such as rainwater discharge and combined pipe network interception, the pumping station is equipped with a multi-pump parallel system and a high-precision liquid level sensor with an error of ≤±2mm, which can realize automatic start and stop according to the liquid level change, avoid idling damage of the pump group at low liquid level or overflow at high liquid level, and effectively respond to sudden large flow impacts such as rainstorms. Its lightweight characteristics (only 1/7 of carbon steel and 1/10 of concrete) make transportation and hoisting more convenient, which is suitable for construction in narrow urban roads and green belts, and the construction period is shortened by 80% compared with traditional concrete pumping stations, only 1~3 days to complete hoisting and commissioning.

The HMPP integrated pumping station is widely used in municipal rainwater and sewage pipe networks, municipal sewage lifting stations, residential districts, commercial complexes and old community pipe network transformation, which can effectively improve the efficiency of urban drainage, reduce the risk of road waterlogging, and ensure the smooth operation of urban water environment. Its design service life is 50~70 years, far exceeding that of FRP pumping stations (20~30 years) and traditional concrete pumping stations (30~40 years), and the later operation and maintenance cost is extremely low, which conforms to the concept of green and sustainable development of cities.

Compared with the HMPP integrated pumping station for municipal drainage, the prefabricated pumping station for rural sewer is designed according to the characteristics of rural sewage treatment, which focuses on balancing economy, easy maintenance and environmental protection, and solves the long-standing difficulties of "difficult collection, difficult operation and maintenance, and difficult compliance" in rural sewage treatment. Rural sewage has the characteristics of small water volume, large diurnal fluctuation of water quality and limited technical level of operation and maintenance personnel, so the prefabricated pumping station for rural sewer adopts a miniaturized design, with a cylinder diameter of ≤2.5 meters and a daily treatment capacity of 50~500m³, which can be flexibly installed in idle land beside rural roads or low-lying areas without occupying a large area, and the ground can be restored to greening or parking after installation, without changing the original style of the village.

In terms of anti-clogging and easy maintenance, the prefabricated pumping station for rural sewer is equipped with triple protection measures: a basket grid or crushing grid is set at the water inlet to intercept or crush large impurities; the water pump adopts a large-channel impeller with a passing diameter of ≥50mm, which is not easy to be blocked by kitchen residues, toilet paper and other sundries in rural sewage; the bottom of the cylinder adopts an anti-sedimentation cyclone structure to avoid sand accumulation, so that the pumping station can realize unattended operation for more than 3 months, greatly reducing the work intensity of rural operation and maintenance personnel. The pump group is equipped with a permanent magnet synchronous motor, which is 15%~20% more energy-saving than the traditional asynchronous motor, and is equipped with a voltage protection device to adapt to the unstable rural power grid environment.

The prefabricated pumping station for rural sewer also has the advantages of fast construction and low impact on the surrounding environment. From site entry to water supply, it usually only takes 3~5 days, which is 80% shorter than the 30-day construction period of traditional concrete pumping stations, and does not produce a lot of construction waste, minimizing the impact on the daily life of villagers. In terms of intelligent operation and maintenance, it is equipped with an Internet of Things controller, which can upload operating data such as liquid level, current and fault codes to the cloud platform in real time through 4G network. Village cadres or operation and maintenance companies can check the equipment status through mobile phone APP and receive fault alarms for precise dispatch, which reduces the technical threshold of operation and maintenance. For different climate conditions, it is also equipped with corresponding protective measures: the outer side of the cylinder in northern areas is wrapped with an insulation layer of ≥50mm to prevent freezing in winter; the waterproof grade of the pumping station in southern rainy areas is ≥IP68 to avoid rainwater seepage into the control system.

Both HMPP integrated pumping station for municipal drainage and prefabricated pumping station for rural sewer adhere to the concept of "factory prefabrication, on-site installation, intelligent operation and maintenance, and green environmental protection", and are respectively adapted to the complex working conditions of municipal drainage and the scattered characteristics of rural sewage. They not only improve the efficiency of water treatment and reduce the cost of construction and operation and maintenance, but also make positive contributions to promoting the modernization of urban and rural water environment governance. With the continuous progress of technology, these two types of pumping stations will be more intelligent and efficient, providing more reliable support for the construction of a beautiful China.