I have a question regarding the switching between a power-frequency pump and an inverter-driven pump
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In the case of one power frequency and one variable frequency setup, are there specific steps specified for switching from variable frequency to power frequency or vice versa? Or is it sufficient as long as the transition is smooth, regardless of the method used? Please explain in detail.
It seems this question is too simple; no one has answered it
Don’t be misled by these; in fact, if you run the original variable-frequency pump at full capacity, it functions just like a conventional frequency-driven pump. After all, there is always a way to switch to a frequency-driven pump! First, gradually increase the current of the variable-frequency pump, then slowly reduce the control valve at the back to maintain a stable flow rate, and finally carry out the normal switching of the pump
If you increase the speed of the variable-frequency pump, it becomes a conventional frequency pump after all, and switching to a conventional frequency pump is always possible! Slowly increase the current of the variable-frequency pump, gradually close the control valve to maintain a stable flow rate, and then proceed with the normal switching of the pump
There are many ways to earn points, but what you’re doing isn’t very good!
There are no explicit rules requiring that the process be kept as stable as possible
There are no very strict regulations regarding the fixed-frequency and variable-frequency operation of the pump at the bottom of the tower. In actual production, emergency situations have arisen during shift duties; in such special cases, it is possible to switch directly to variable-frequency operation, and once the variable-frequency mode is working properly, the fixed frequency can be adjusted. Starting the pump at fixed frequency results in a higher flow rate, which can cause competition for flow between the pumps. Variable-frequency pumps are easier to adjust, and stable operation is the priority in actual production. Switching between modes can lead to fluctuations in the operations of subsequent units, but as long as there is good coordination and timely adjustments, there are no major problems. The main issues arise from temporary drops in the flow rate of raw materials or overheating at the outlet of the heating furnace, which disrupts the heat balance within the tower; in severe cases, this affects product quality. There have also been instances of significant fluctuations when making such switches, so it is necessary to improve the operational skills of the staff to ensure stable production
The outlet of the pump is equipped with a control valve, which can be used for adjustment!