How should the vacuuming of the hot water pump in a conversion system be carried out?

Draining the hot water pump of the conversion system can cause damage to the equipment; the pump should be stopped immediately.

First, start the backup pump; second, reduce the outlet valve opening, check the outlet pressure gauge, and once the pressure reaches the required level, slowly increase the outlet valve opening. (Press the switch several times)

1. First, close the outlet valve of the small pump, use the pump backflow valve to vent air, and monitor the pressure gauge at the pump outlet. 2. Reduce the U-valve to maintain the saturation tower liquid level. 3. Increase the steam supply. Reduce production capacity if necessary. 4. First, it is necessary to determine the cause of pump cavitation – whether there is no liquid level in the hot water tower or if cavitation is occurring in the pump.

This post was last edited by Lutao on 2011-3-14 at 19:27. First of all, I would like to explain what is meant by \"vacuuming\". Generally, when the liquid level in the tower, tank, separator, or vessel at the pump inlet is gone and gas is drawn in, this is referred to as vacuuming. There’s no liquid level at the inlet – why keep it running? Stop the pump immediately. Raise the liquid level at the inlet before turning it on. When there is a lack of flow, the current fluctuates significantly, the pump makes a lot of noise, and there is vibration, etc. As for cavitation, it occurs during normal operation due to an excessively small opening of the outlet valve and a small opening of the return valve; in such cases, there is no change in the pump’s current, but the sound emitted by the pump increases. Vibration. When starting the pump for the first time, it’s necessary to remove the gas present inside the pump. If this gas isn’t completely removed, the pump won’t be able to deliver fluid. Even if fluid is delivered, the presence of gas in the pump will cause phenomena similar to cavitation. It’s important to understand the operating conditions in order to handle the situation properly. If time is truly available, then the liquid level at the inlet is a false liquid level.

This post was last edited by 654262293 on 2012-7-14 15:15: 1. Close the outlet valve of the pump to stop it. 2. Control the liquid level in the saturated tower to prevent gas from escaping from it. 3. Notify the scheduling and subsequent processes to prepare for volume reduction. 4. Adjust the steam volume appropriately based on the trend of CO at the outlet after transformation. 5. Open the make-up water valve of the hot water tower fully to establish a liquid level in it as quickly as possible, and then start the hot water pump.

Reply to 4# Mimi Si: Under normal circumstances, it is absolutely not allowed to start the backup pump, as this will only worsen the operating conditions!

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If the pump is empty, there’s no point in starting it anyway. Identify the cause of the empty condition, and wait until the liquid level in the upstream container returns to normal before starting the pump.

1. First, pay attention to the level of the liquid in the saturated tower； 2. When the liquid level is high, be careful to handle it while it is still liquid ； 3. When the liquid level is low, be cautious of air ingress; close the valve of the “U”-tube if necessary ； 4. Increase the steam addition amount ； 5. Notify the scheduling department or subsequent processes to make adjustments for significant fluctuations in CO ； 6. Once items 2, 3, and 4 are properly handled, establish the hot water tower level and vent at the pump inlet ； 7. Establish a hot water circulation as soon as possible.