Single test run of the turbine in the propylene chiller: at what opening degree of the valve should it be adjusted during startup to get the rotor rotating?
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The last edit to this post was made by johnh on 2016-6-20 at 11:39: During the single-test run of the propylene chiller turbine, adjust the opening degree of the valve to determine at what level the rotor will start rotating
There is no load during the single test of the turbine; it’s hard to determine what speed to use, right? It depends on parameters such as steam pressure and temperature, I guess
When warming the pipes, open the manual steam main valve slightly less; keep the pre-cooling drain valve fully open. Once the desired temperature is reached, reduce the flow through the drain valve to increase the pressure. During low-speed warm-up, it is not necessary to fully open the manual main valve; pressure is the key factor to consider. Enter the speed manually or set a low-speed warm-up speed; the steam valve will open automatically upon adjustment. When the critical point is reached, the manual steam main valve needs to be fully opened, and the drain valve needs to be closed completely.
This post was last edited by *aohong30 on 2016-6-19 at 22:21. After the heating pipes are warmed up, the main steam valve before the quick-shut valve should be fully opened; the control valve can then be used to gradually increase the opening degree. Are you worried that the control valve might be opened too far, so you’re using a valve cut-off to limit flow as a safety measure?
Here, our low-temperature methanol wash unit processes 400,000 cubic meters of gas per hour; the purified gas output is 270,000 cubic meters per hour. The speed of the chiller is 6300 RPM, with a power consumption of 5000 KW. After consulting experts from Hangzhou Motor, it is estimated that the rotor will start rotating at an opening of two notches, and it will reach the speed at which it shuts down due to overspeed at an opening of around 10 notches; the steam consumption is approximately 5 tons per hour.
For our three series, the initial test run of the propylene compressor turbine was successful; the speed control valve at around position 5 caused the rotor to start moving……
It’s just at the beginning stage; when testing the turbine alone, adjusting the valve opening doesn’t result in significant changes. When testing our turbine alone, we adjust the valve opening by around 1.5 units