Inner sleeve plate structure for plate-type fractionating tower

Abstract

The invention relates to an inner sleeve plate structure of a plate-type fractionating tower. The inner sleeve plate structure comprises a group of column trays and down-flow plates arranged in the tower normally; the down-flow plates are cooperated with the inner sleeve plate structure; the down-flow plates and liquid-receiving trays are disposed on every layer of the column tray; the down-flow plates is fixedly connected or boltedly connected with a down-flow plate connecting plate; and the down-flow plate connecting plate is connected with the inner wall of the tower. The inner sleeve structure comprises at least one inner sleeve plate; and the inner sleeve plate structure is arranged along a tower height direction; namely, at least one inner sleeve plate is fixed in the tower along the wall of the plate-type fractionating tower. The inner sleeve plate structure is used for changing an overflowing area of the liquid-receiving trays. The inner sleeve plate structure can eliminate viscous flow areas of the column trays, is adaptive to gas-liquid load changes in the tower, increases process performance of the fractionating tower, increases liquid flow speed on the column tray plates; eliminates viscous flow of the liquid, and effectively prevents heavy, poor and heat-sensitive materials from phenomena such as cracking, polymerizing, coking, scaling, blocking and the like on the column trays.

Description

technical field [0001] The invention relates to an internal part of a fractionation tower, in particular to an inner sleeve plate structure of a plate type fractionation tower. Background technique [0002] As an important mass transfer and separation equipment in petroleum, petrochemical, pharmaceutical and other fields, plate fractionation column is widely used. Tray column internals mainly include tray plates, downcomers, feed distributors (distributors), oil collection tanks, gas distributors, liquid extraction and other structures. As the main internal member, the tray plate is divided into three types: bubbling type, jet type and mixed type. Regardless of the type, the basic structure of the tray plate is as follows figure 1 As shown, it is mainly composed of bubbling area (a, f), downcomer area b, liquid distribution area c, foam breaking area d and invalid area e. Due to the circular structure of the fractionation column, there is a stagnation zone f in the bubbli...

AI Technical Summary

Problems solved by technology

This patent does not have the functions of eliminating the stagnation area of ​​the tray, adapting to the change of the gas-liquid load in the fractionation column, improving the process performance and separation efficiency of the tray plate, and failing to effectively prevent heavy, inferior, and heat-sensitive materials from being trapped in the tray plate. Pyrolysis, polymerization, coking, fouling, clogging, etc.

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