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The method of current impulse and regulating pressure/flow of submersible pump is similar to that of blower. When submersible pumps start and stop suddenly, the water cone usually appears as a simple pipe loosening or cracking. Severe damage to reverse osmosis water equipment can be caused by the motor. When the motor starts/stops, it needs to open/close the valve to reduce the impact of the water cone. On the one hand, the operation is intensive and difficult to satisfy the technology. Demand. In the future, the frequency converter of submersible pump device can make the motor start/stop softly according to the technical requirements, so that the jet and water cone appearance can be solved. In the case of low flow rate, the speed of pump can be reduced. On the one hand, it can prevent the pump from working at full load for a long time, and form the premature aging of motor. Moreover, the soft start of frequency conversion greatly reduces the impact on the machinery when the pump starts, and has a significant power saving effect.

After using EH600A series frequency converter, the blower and submersible pump in sewage treatment plant not only eliminates many troublesome manual operation and unsafe dangerous elements, but also keeps the system running in an energy-saving condition, prolongs the service life of the equipment, and is very used to the production demand. EH600A series of converters have abundant control functions, which can easily complete closed-loop automatic control with other control systems. Besides, EH600A adopts a standard MODBUS communication protocol, and also completes centralized control in DCS system. Therefore, the application of frequency converter in sewage treatment system has excellent implementation value.

Author: Hangzhou Water Shield Technology Co., Ltd.

Key words: reverse osmosis pure water equipment, pharmaceutical pure water equipment