Drain all liquid from in front of the magnetic pump in the liquid chlorine storage tank
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This post was last edited by sunjl1981 on 2013-1-6 at 22:48. During the liquefaction of chlorine, magnetic pumps are used to transfer liquid chlorine from the storage tank to the packaging area. Since the pressure of the liquid chlorine in the pipes can increase sharply due to rising external temperatures when the system is shut down, this could lead to accidents; therefore, it is necessary to use nitrogen to push the liquid chlorine back into the storage tank. I would like to ask how the liquid chlorine in the pipes ahead of the pump can be sent back to the storage tank Can compressed air in the pipeline before the pump be used to allow liquid chlorine to pass through the pump and return to the storage tank? The question is whether nitrogen can pass through when the pump is stopped # + + .
1. Do not use nitrogen or compressed air for pressurization; these are non-condensable gases that can significantly affect the pressure in the chlorine system. 2. After stopping the pump, open a little of the outlet – the pressure in the pipeline will cause the liquid chlorine to flow back into the tank on its own. 3. Do not close the pump’s return valve, so that the gas phase in the liquid chlorine pipeline and the tank remains connected at all times (it is not allowed for both ends of the liquid chlorine pipeline to be sealed)
Reply to 2# jin*angyu: I would like to ask further. Under normal conditions, the pressure in the pipeline is the same as that in the tank; unless the temperature of the pipeline rises, isn’t it then not possible to push the fluid back into the tank? Another issue is what to do with the liquid chlorine in the pipeline ahead of the pump during pump maintenance? It won’t work if it’s emptied completely
1. The pressure in the filling pipeline must be relieved; otherwise, chlorine leakage will occur. This is especially true in summer, as the vaporization of liquid chlorine can cause overpressure in the filling pipeline and lead to leaks. During the shutdown period, it is necessary to keep the pump connected to the storage tank in order to balance the pressure of the gasified chlorine. 2. If the pump needs to be repaired, liquid chlorine can only be treated by evacuating it.