Full-liquid-phase fluid uniform distribution device of high-pressure wound-tube type heat exchanger

Abstract

The invention discloses a full-liquid-phase fluid uniform distribution device of a high-pressure wound-tube type heat exchanger The full-liquid-phase fluid uniform distribution device comprises a shell and a central cylinder, wherein a liquid receiving disk is welded between the shell and the central cylinder, a connection pipe is arranged outside the shell above the liquid receiving disk, at least two vertical heat-exchange pipes are arranged between the shell and the central cylinder, a liquid-enclosing weir pipe sleeved on the heat-exchange pipes is welded on the liquid receiving disk, and the upper end face of the liquid-enclosing weir pipe is horizontal. As the absolute horizontalness of a liquid disk can hardly be guaranteed when equipment is installed, with the liquid-enclosing weir pipe, a horizontal plane is provided to the liquid, liquid on the liquid-enclosing weir pipe can flow downwards along the walls of the heat-exchange pipes and along an annular space so as to form a uniform liquid film, and thus, the heat-transfer performance is improved. According to the full-liquid-phase fluid uniform distribution device disclosed by the invention, the problem of nonuniform distribution of a shell-pass full liquid phase of a large high-pressure wound-tube type heat exchanger is solved, and the full-liquid-phase fluid flows in a uniform distribution manner in the shell pass, so that the wound-tube type heat exchanger is greatly improved in heat-transfer performance.

Description

Technical field [0001] The invention relates to a shell-side fluid distribution structure used on a large-scale high-pressure wound tube heat exchanger, in particular to a shell-side fluid whose feed is all liquid and gas-liquid. Background technique [0002] In the world, energy demand is increasing. Natural gas purification, liquefaction, and hydrocarbon recovery devices require a large number of high-pressure wound tube heat exchangers. Now domestic large-scale wound tube heat exchangers for large-scale natural gas (LNG) liquefaction are being designed and Manufacturing research and development. A single piece of these equipment can reach a diameter of more than 7 meters and weigh about 350 tons. The fluid is unevenly distributed in the equipment. The uneven flow formed by the uneven distribution of the fluid on the shell side will greatly reduce the performance of the entire heat exchanger. This is also a design difficulty for large-scale high-pressure wound tube heat exchan...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a uniform distribution device for the full liquid phase flow of the coiled heat exchanger with simple structure, convenient use and high heat transfer efficiency for the uneven distribution of fluid in the shell side.

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