Daily Question: [2011.8.1] What is the reason for using variable-frequency motors in high-pressure slurry pumps?
Thread Content
Why are variable-frequency motors used in high-pressure coal slurry pumps?
Reply 1# wlq1970: High-pressure slurry variable-frequency motors are used because high-pressure variable-frequency speed control technology can not only improve the manufacturing process, extend the service life of equipment, and enhance work efficiency; most importantly, it enables \"energy savings and reduced consumption\", which is in line with **policy requirements**. It is easy to install, simple to operate, stable in performance, safe and reliable, and convenient to maintain. It offers significant advantages in terms of energy savings, power reduction, labor savings, effort reduction, automatic control, and remote monitoring, making it highly cost-effective.
Reply 1# wlq1970 Energy saving
It’s too difficult; I guess it’s due to the technical requirements
The coal slurry flow rate can be adjusted frequently; using variable frequency drives provides flexibility, and it avoids pressure buildup as well as the need for backflow.
I came to see the answers
Reply to 2# cl6119, learn* it.
Reply to 3# lsl343952854: It doesn’t seem that it should be only about energy savings and convenience； This is mainly because high-pressure pumps generally have some characteristics of positive-displacement pumps, and it is difficult to adjust them using conventional outlet valves; therefore, frequency conversion control is used.
Generally, a positive displacement pump is used, and an inverter-driven motor is employed to adjust the speed in order to control the flow rate, which can overcome the limitations associated with flow control valves. However, measures must be put in place to address the issue of high pump outlet pressure, as well as the problem of establishing the slurry flow rate at the start of operation.