Gas liquid eddy flow type highly efficient downcomer

Abstract

This invention discloses an air current cyclonic type downcomer, which is used in the knockout tower in the chemical and petrifaction fields. Said downcomer comprises two inside and outside pipes with different diameters, wherein between the two pipes is arranged cyclonic guide blade. The guide blade is strip shape, fan shape or triangle, and has a certain angle of dip with the horizon. The invention is characterized in that, the fluid rotates in the guide of the cyclonic guide blade, and the centrifugal effort makes the gas to separate with the fluid, after separating the gas enter into the inner pipe through the hole in the pipe wall, while the fluid inlet into the fluid pan in the lower column plate through the gap of the inside and outside pipes. Such structure can increase the deairing ability of the downcomer and the efficiency of the column plate.

Description

technical field [0001] The invention relates to a gas-liquid swirling high-efficiency downcomer, which belongs to the technology of tower internals used in separation towers in the chemical and petrochemical fields. Background technique [0002] As an indispensable column internal part in unit operation equipment such as rectification and absorption, tray has a development history of nearly 200 years. In order to seek high-efficiency and large-throughput trays, the research on trays has never stopped. The gas-liquid cross-flow tray structure can be divided into three parts according to the direction of liquid flow: the downcomer area (receiving tray), the effective area, and the downcomer area (downcomer). Among them, the liquid receiving area receives the liquid from the upper tray; the effective area provides the necessary space for the contact mass transfer and heat transfer between gas and liquid. The larger the area of ​​the effective area, the higher the efficiency of...

AI Technical Summary

Problems solved by technology

The common features of these three types of downcomers are: the liquid overflows, the entrained gas slowly separates from the liquid and rises from the downcomer space, and part of it returns to the upper tray; but some of the gas is entered The liquid in the downcomer is entrained again, resulting in incomplete gas separation, the plate area occupied by the downcomer cannot be significantly reduced, the effective area cannot be significantly increased, and the liquid handling capacity cannot be increased

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