Gas low temperature heat exchanger capable of self eliminating stress and pollution proof

Abstract

The gas low-temperature heat exchanger with self-relieving stress and anti-pollution belongs to the field of low-temperature engineering and low-temperature technology. The invention includes a cylinder body of a low-temperature heat exchanger, a lower head of a low-temperature heat exchanger, an upper head of a low-temperature heat exchanger, A, B, C and D four shell-and-tube heat exchangers, tube sheets, support plates, low-temperature heat exchanger tube-side inlet tubes, low-temperature heat exchanger tube-side outlet tubes, low-temperature heat exchanger shell-side inlet tubes and low-temperature heat exchangers Shell-side outlet pipe. The shells of the four shell-and-tube heat exchangers are narrow and rectangular, and the heat exchange tubes are U-shaped heat exchange tubes. The four shell-and-tube heat exchangers are placed in the low-temperature heat exchanger cylinder in a square array and connected in series. . The material used in the low-temperature heat exchanger is OCr18Ni9 / 304, which has low air permeability, smooth inner surface, wear resistance, strong corrosion resistance, and stable performance, preventing gas from being polluted. In addition, at low temperature, the stress generated by the thermal expansion and contraction of the material is considered, so that the stress can be eliminated by itself, and its sealing performance is improved. Finally, the low-temperature heat exchanger has good sealing performance and prevents the gas from being polluted. It has significant economic and social benefits.

Description

Technical field [0001] The present invention relates to a low-temperature gas heat exchanger, in particular to a low-temperature gas heat exchanger with self-stress relief and pollution prevention. It belongs to the field of cryogenic engineering and cryogenic technology. Background technique [0002] A major project of Shanghai Science and Technology Commission: Alpha Magnetic Spectrometer 02 (AMS-02) Ground Support Equipment System Research, the ground support equipment system completed the cooling, testing and superfluid helium filling of the superconducting magnet before the launch of AMS-02 Important system. This system will complete the cooling of the AMS-02 superconducting magnet from ambient temperature to 1.8K and the entire process of filling it with superfluid helium. The 300-80K controlled cooling system is the low temperature ground support equipment system of the AMS-02 detector Its main function is to realize the cooling of AMS-02 magnet from normal temperature (ab...

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Problems solved by technology

However, the heat exchange tubes used in this patent are straight tubes, and the influence of the stress caused by thermal expansion and contraction on the sealing performance of the heat exchanger is not considered.

The above-mentioned patents are all applied in high-temperature occasions, and they cannot meet the requirements of anti-pollution and self-relieving stress at the same time.

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