Molten salt pump complete device with in-tank under-pressure design

Abstract

The invention discloses a molten salt pump complete device with in-tank under-pressure design. The molten salt pump complete device comprises a high-temperature molten salt pump and an under-pressure molten salt tank, wherein the lower portion of the high-temperature molten salt pump extends into the under-pressure molten salt tank, a sealing corrugated pipe is arranged at the joint of an opening of the under-pressure molten salt tank and a pump bottom plate, a heat insulation pad is arranged between the upper end face of the pump bottom plate and a pump body, a bottom plate seal is arranged between an inner ring of the heat insulation pad and the pump body and between the inner ring of the heat insulation pad and the pump bottom plate, a shaft seal is arranged at the upper end of the pump shaft, one side of the pump shaft connecting pipe is connected with a liquid outlet pipe, and the liquid outlet pipe upwards extends out of the pump body. The molten salt pump complete device is simple in structure and reasonable in design, gas pressure is adopted on the molten salt in the molten salt tank, pump work is not needed, the molten salt in the pipe can be automatically filled, the height design of the molten salt tank is reduced, the length design of a molten salt circulating pump is shortened, the reliability of the molten salt circulating pump is greatly improved, the service life of the molten salt circulating pump is greatly prolonged, the construction cost of a photo-thermal power station is reduced, and the popularization and application value of the photo-thermal power station is improved.

Description

technical field [0001] The invention relates to the technical field of molten salt pumps, in particular to a complete set of molten salt pumps designed under pressure in a tank. Background technique [0002] Molten salt pump is the key equipment for molten salt fluid transportation. Because molten salt medium has the characteristics of high working temperature and low temperature condensation, the traditional form of molten salt pump is generally a vertical long-axis pump, which is installed above the free liquid surface of the molten salt tank. Prevent the sealing part of the rotating part of the pump body from contacting the molten salt. Because the molten salt tanks of solar thermal power stations are mostly designed under atmospheric pressure conditions, the molten salt in the pipeline needs to be filled under the working conditions of the pump. The height of the molten salt tank is designed to be as high as 15-18 meters, and the molten salt main circulation pump is also...

AI Technical Summary

Problems solved by technology

Because the molten salt tanks of solar thermal power stations are mostly designed under atmospheric pressure conditions, the molten salt in the pipeline needs to be filled under the working conditions of the pump. The height of the molten salt tank is designed to be as high as 15-18 meters, and the molten salt main circulation pump is also designed to be 15-18 meters. meters, bulky, expensive, and very inconvenient to repair and maintain

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