Low-temperature double-ball spherical tank liquid distribution system and precooling method

Abstract

The invention provides a low-temperature double-ball spherical tank liquid distribution system which comprises an upper inlet liquid distributor and a lower liquid inlet pipe, wherein the upper inlet liquid distributor and the lower liquid inlet pipe are arranged at the top and lower part of an inner spherical tank; the liquid distribution system comprises a middle inlet distributor arranged at the middle of the inner spherical tank; the middle inlet liquid distributor consists of a middle liquid inlet pipe and a middle liquid distributor; the middle liquid inlet pipe is guided from the bottom of an outer spherical tank, is guided to the middle of the inner spherical tank along an interlayer and penetrates through the inner spherical tank so as to be connected with the middle liquid distributor in an equatorial plane of the inner spherical tank. A precooling method of the low-temperature dual-ball spherical tank is realized by virtue of preparation before precoling, a front-stage precooling stage, a middle-stage precooling stage and a rear-stage precooling stage. By virtue of matched use of the upper inlet liquid distributor and the middle inlet liquid distributor, large-range uniform liquid distribution in a precooling process is realized, the wall temperature distribution of the inner spherical tank in the precooling process is effectively improved, the temperature stress is reduced, and the structural safety of the low-temperature dual-ball spherical tank in the precooling process is greatly improved.

Description

technical field [0001] The invention relates to a low-temperature double-spherical tank liquid distribution system and a precooling method. Background technique [0002] Cryogenic double-spherical tanks are mainly used to store cryogenic liquids, including liquid oxygen, liquid nitrogen, liquid argon, liquid hydrogen, liquid hydrocarbons and other media, and are key core equipment for cryogenic systems and liquefaction devices. The low-temperature double-spherical tank is mainly composed of an inner spherical tank, an outer spherical tank, an interlayer, a pillar structure, a piping system, an instrument measurement system, a safety device, and a ladder platform. 3 , is currently developing in the direction of larger volumes. The low-temperature double-spherical tank must be pre-cooled with low-temperature liquid before filling for the first time. The drop produces a large temperature difference stress and damages the tank body. [0003] The liquid distribution system...

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Problems solved by technology

[0004] The object of the present invention is to provide a low-temperature double-spherical tank liquid distribution system to solve the problem that the existing low-temperature double-spherical tank liquid distribution range is too small , The problem of uneven liquid distribution area

[0005]Another object of the present invention is to provide a low-temperature double-spherical tank precooling method to solve the problem of tank wall temperature in the existing low-temperature double-spherical tank precooling process. Uneven, discontinuous, and large temperature differences

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