Example application of submersible pump in sewage treatment plant
When the submersible pump is started, the current impact and the way of adjusting the pressure/flow are similar to that of a blower. The rapid flow when the submersible pump is started and the water cone phenomenon when it is suddenly stopped are often easy to cause loose or rupture of the pipeline, which may cause serious damage to the motor, and the valve needs to be opened/closed to reduce the impact of the water cone when the motor starts/stops. On the one hand, the operation is very intensive and difficult to meet the needs of the process.
After installing the frequency converter in the submersible pump, the motor can be soft-started/soft-stopped according to the needs of the process, so that the rapid flow and water cone phenomenon can be solved. Moreover, when the flow is not large, the pump speed can be reduced. On the one hand, it can prevent the pump from working at full load for a long time, causing premature aging of the motor, and the frequency conversion soft start greatly reduces the impact on the machine when the pump starts. , And has obvious power saving effect.
After the blower and submersible pump in the sewage treatment plant use the EH600A series inverter, it not only eliminates many troublesome manual operations and unsafe hidden danger factors, but also keeps the system running in an energy-saving state, extending the equipment The service life is better adapted to production needs.
The rich control functions of EH600A series inverters can easily realize closed-loop automatic control with other control systems, and EH600A adopts standard MODBUS communication protocol, and it is easy to realize centralized control in DCS system. Therefore, the use of frequency converters in sewage treatment systems has very good promotion value.
