High-temperature molten salt pump

Abstract

The invention relates to a high-temperature molten salt pump. A main shaft is arranged in the pump from top to bottom in a penetrating manner, a suction cover is arranged at the bottom of the pump, adischarging body is arranged at the upper portion of the suction cover, an impeller is arranged in the center of the suction cover, guide vanes are arranged on the outer circle and the upper end of the impeller, the bottom end of the discharging body is connected with the suction cover through bolts, and the top end of the discharging body is connected to a cylindrical pipe through bolts; and theouter circles of the guide vanes are connected with the suction cover and an inner spigot of the discharging body in a matched manner, and a sliding bearing body is arranged above the discharging bodyand connected with the discharging body and the cylindrical pipe through flanges. According to the high-temperature molten salt pump, the manner of a liquid outlet pipe is improved, a power seal is arranged above the liquid outlet pipe, gas is arranged between the power seal and a bottom plate, thermal isolation of a high-temperature medium is achieved, and heat is directly conducted to the bottom plate and a support of the pump without high-temperature molten salt; and the temperature of the shaft is guaranteed to have a reasonable temperature drop gradient from the high-temperature end of the bottom plate to the bearing installation position, and stress deformation of the shaft due to sudden drop of the shaft temperature in a traditional cooling manner is avoided.

Description

technical field [0001] The invention relates to a high-temperature molten salt pump, which belongs to the single-stage, single-suction, submerged pump type, and is suitable for a special pump for conveying high-temperature molten salt medium, and is used for melamine projects, alumina projects, caustic soda projects, solar power generation, etc. Background technique [0002] The high-temperature molten salt pump is used to transport molten salt in a molten state. The temperature of molten salt is usually 220~560°C, which is a medium with high temperature and high melting point. Traditional molten salt pumps use sliding bearings with self-flushing pipes. When the molten salt pump stops, a large part of the molten salt filled in the pump will flow back into the tank. When the motor starts to drive the pump main shaft to rotate, the main shaft breaks or other parts are damaged because the molten salt in the pump is in a molten state; or when reheating is not sufficient, it can ...

AI Technical Summary

Problems solved by technology

The cooling method of the traditional molten salt pump is to directly cool the shaft with a water-cooled jacket above the bottom plate and the outlet section, resulting in a sudden drop in shaft temperature, which causes the stress and deformation of the shaft

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