The liquid chlorine magnetic pump fails after the system is shut down
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Our company purchased 2 magnetic pumps this year, and according to the manufacturer’s requirements, the pumps need to have their shafts rotated every 2 hours. After the system is shut down, we will continue to use pumps to fill it with liquid chlorine. But recently, after parking to charge, the pump would stop rotating after about 4 to 8 hours. After discharge, it could rotate, but it couldn’t rotate again after feeding. We removed the impurities from the material, eliminating the possibility that these impurities could cause the impeller to get stuck. Could someone with experience please provide a troubleshooting method and ways to prevent the pump from not being able to rotate after it stops? Thank you all
For liquid chlorine, there is no issue of crystallization or excessive viscosity; the inability to rotate the machine is caused only by jamming or friction
At first, we thought it was impurities in the liquid chlorine. We checked the magnetic filter and found no problems with it. Of the two identical pumps, only one was experiencing frequent issues. After disassembling it, we saw that there was nothing wrong with the impeller, which rotated normally. There was a lot of water in the magnet part; after draining the water, it could be rotated, but the inlet disk wouldn’t move. We believed this was due to pre-cooling and freezing caused by water. The moisture content in the liquid chlorine was within normal limits. Since there were two pumps, we suspected that the faulty pump had air trapped in it. But there is also no evidence to support that
I have worked on the magnetic pumps used in the West-to-East Gas Pipeline project; the inlet pressure is 6 MPa, and the pump rotates smoothly regardless of whether fluid is present or not! Once the outlet valve is opened, the gas can also be discharged automatically; there are probably other issues
I have worked on the magnetic pumps used in the West-to-East Gas Pipeline project; the inlet pressure is 6 MPa, and the pump rotates smoothly regardless of whether fluid is present or not! Once the outlet valve is opened, the gas can also be discharged automatically; there are probably other issues
I have worked on the magnetic pumps used in the West-to-East Gas Pipeline project; the inlet pressure is 6 MPa, and the pump rotates smoothly regardless of whether fluid is present or not! Once the outlet valve is opened, the gas can also be discharged automatically; there are probably other issues
This situation occurs frequently, especially when the relative humidity is high. Low-temperature liquid chlorine causes the moisture in the air outside the isolation sleeve to frost, resulting in the outer magnetic steel and the isolation sleeve freezing together and preventing the machine from rotating. Firstly, prevent rainwater and other substances from entering the external magnet. Additionally, we implement nitrogen purging for the external magnets of liquid chlorine pumps in low-temperature environments to avoid the presence of water there.
This situation occurs frequently, especially when the relative humidity is high. Low-temperature liquid chlorine causes the moisture in the air outside the isolation sleeve to frost, resulting in the outer magnetic steel and the isolation sleeve freezing together and preventing the machine from rotating. Firstly, prevent rainwater and other substances from entering the external magnet. Additionally, we implement nitrogen purging for the external magnets of liquid chlorine pumps in low-temperature environments to avoid the presence of water there.
The gap between the inner and outer magnets of the magnetic pump as well as the isolation sleeve needs to be as small as possible in order to ensure the highest possible torque. Therefore, it’s possible that there are liquid droplets that have frozen on the isolation sleeve, which prevents the shaft from rotating. Examine the equipment carefully; it is recommended to try the nitrogen purging method mentioned above.