Pump industry suppliers - How to deal with a high temperature molten salt pump cavitation condition

how to deal with a high temperature molten salt pump cavitation condition

high temperature molten salt pump cavitation condition refers to the molten salt before arrived in centrifugal impeller in transportation temperature of saturated vapor pressure is equal to or less than the pump inlet pressure and part of gasification, pressurized fluids are centrifugal impeller with bubble, due to the working pressure, the bubble recedes, material quickly fill the bubble interior space, lead to the impact of the centrifugal impeller, pump caused by noise and vibration, more serious, the total capacity of the water pump, pulling force and high efficiency is decreased obviously.

seal of high temperature molten salt pump how to choose?

gasket scope is to avoid two wedges between job stress, etching, and certainly a heat pipe from the cold. According to the characteristics of raw materials and non-metallic gaskets can be divided into -, metal gasket, metal materials Nonmetallic material composite gasket three categories. For the characteristics of molten salt, people usually use metal gasket.

in view of the high temperature and high temperature molten salt pump common metal gasket, lower raw material on its performance in detail based on the following:

1, duplex stainless steel, also has excellent resistance to water hydrogen chloride gas erosion, hydrochloric acid, ammonium sulfate and oxidizing salt solution erosion performance. Under the standard of high temperature with high compressive strength.

2, stainless steel plate: when the temperature raise its compressive strength and corrosion resistant performance, when the temperature of the high temperature molten salt pump is ascension than other general stainless steel plate with a regulator stress relaxation performance.

3, carbon steel, when the material has a reducing, thin high quality cold-rolled steel sheet should not be used on manufacturing strong oxidizer, neutral or alkaline acid salt solution of machinery and equipment, if carbon steel suffers in in-situ stress, to water working condition under the standard of equipment failure rate is very high.

4, titanium: standard in high temperature, with excellent corrosion resistance, good erosion resistance to sodium cyanide. Titanium in most of the very few used in aqueous alkali, blend in to the air oxidation work standards.

in the case of selecting gasket, pipe on the basis of high temperature molten salt material temperature, interface mode, the specific requirements of sealing and higher cost performance aspects to carry out the selection of raw materials, to prevent the leakage of high temperature molten salt burn staff, reasonable to ensure that the molten salt system reliable operation of the software.

in the normal maintenance of high temperature molten salt pump, should be particularly concerned about vibration and noise, if find vibration, should be immediately shutdown inspection and fault detection, in order to prevent unnecessary inconvenience and harm. Cause of high temperature molten salt pump vibration: spare parts such as hydraulic support under the docking is not the same heart; High temperature molten salt water pump parts such as serious damage of the rolling bearing; High temperature molten salt pump pump shaft bending.

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