Application of frequency converter in water supply system

Frequency converters are widely used in the water industry, with significant energy-saving effects. They are mainly involved in water supply, drainage, sewage treatment and other links. Specifically in the water supply system, frequency converters can be used to adjust the speed of the water pump, thereby achieving precise control of the water supply pressure and flow.

Application Solution

ZK300 series constant pressure water supply dedicated inverter (suitable for 7.5kW-630kW motor) + PLC control system + pressure sensor, build an efficient and stable constant pressure water supply system. By adjusting the speed of the water pump motor, dynamically matching the water demand, the pipe network pressure is constant.

Core functions

1). Closed-loop control: Adjust the output frequency in real time based on the PID algorithm to ensure stable pressure and accurately maintain the pipe network pressure at the set value.

2).Multi-pump linkage: Support "one-to-many" control, automatically switch the main and standby pumps, improve system reliability, and ensure uninterrupted water supply.

3).Energy saving and consumption reduction: Reduce shaft power by reducing the speed of the water pump, and the comprehensive power saving rate reaches 20%-40%, significantly reducing operating costs.

Solution Advantages

Constant pressure water supply macro function:

Built-in constant pressure water supply macro function, you only need to set the target pressure and range for quick debugging, simplify the operation process and improve debugging efficiency.

Support sleep and wake-up control, automatically shut down when the pressure reaches the standard, restart when the pressure is insufficient, reduce invalid operation, and further save energy.

High reliability guarantee:

Soft start-stop technology: eliminate water hammer effect, extend the life of water pumps and pipe networks, and effectively reduce equipment damage caused by water hammer.

Multiple protection mechanisms: with all-round protection such as overpressure, underpressure, overload, short circuit, etc., reduce the failure rate and ensure stable operation of the system.

Flexible adaptability:

Compatible with remote pressure gauges and pressure transmitters, support local/remote dual control mode, convenient operation and maintenance, and meet the needs of different scenarios.

The system design is flexible and can be customized according to needs to improve the adaptability and scalability of the system.

Application scenarios

Water plants and pumping stations:

Applicable to water plants and secondary pressure pumping stations to ensure stable water pressure for residents and improve the quality of water supply services. Through the constant pressure water supply system, the water supply pressure is ensured to be constant, meet the daily water needs of residents, and improve the water use experience of residents.

Industrial circulation system:

Applicable to industrial cooling water circulation, boiler water replenishment and other scenarios to achieve precise pressure control and energy saving, and improve industrial production efficiency. The system can automatically adjust the water supply pressure and flow according to the needs of industrial production, ensure the stable operation of the industrial production process, and reduce energy consumption.

Building water supply system:

Applicable to high-rise residential buildings and commercial complexes to avoid water pressure fluctuations affecting user experience and ensure safe and stable building water supply. Through intelligent control, water supply on demand is achieved to avoid adverse effects on building facilities and users due to excessive or low water pressure.

Agricultural irrigation system:

Applicable to large-scale farmland irrigation systems, adjust flow on demand, reduce water resource waste, and improve agricultural irrigation efficiency. The system can automatically adjust the irrigation flow according to the needs of farmland irrigation to ensure uniform farmland irrigation and improve water resource utilization efficiency.