Should a check valve be installed at the outlet of the liquid sulfur pump? When transporting substances that are prone to solidification, how should the pump outlet be drained completely?
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Should a check valve be installed at the outlet of the liquid sulfur pump? When transporting substances that are prone to solidification, how should the pump outlet be drained completely?
We do not install check valves at the outlet of the liquid sulfur pump. The pipes and valves at the pump’s outlet are equipped with jacketing, and they are heated with steam at 0.3 MPa to prevent sulfur from solidifying.
During maintenance, is the liquid sulfur in the pump outlet pipeline drained through the pump’s drain port?
The liquid sulfur pump is a submersible pump that does not require drainage of accumulated liquid.
You are using a jacketed pump; in maintenance mode, the pump body has an exhaust port, while the piping, being a jacketed type, generally does not require an exhaust.
I don’t know much about this area; you can refer to the opinions of other travelers, and I’ve also learned from them.
Based on the principles of chemical engineering, installing a check valve at the pump outlet can effectively prevent the liquid in the outlet pipeline from flowing back after the pump loses power. This prevents shock waves from being generated as a result of backflow, which could damage the pump impeller or cause the pump shaft to deform. To prevent crystallization, insulation and heating systems or double-walled tubes are typically used; insulated valves are employed, and a bypass drain is installed at the outlet of the check valve. During shutdown, the material inside the pipeline is drained to avoid crystallization；
I worked on a project involving vertical liquid sulfur pumps; check valves could not be used at the outlet, so control valves were installed instead