Method and device for improving flow character of gas liquid bubble column with row tubes

Abstract

The invention discloses a method and a device used for improving the flowing characteristic of the slurry bubble tower with row tubes; the device comprises a tower body, a gas distributor and a vertical heat exchanging row tube bundle; the lower end of the vertical heat exchanging tube bundle is connected with a liquid distributor which is fixed at the lower part of the tower body and the upper end thereof is connected with a liquid collector which is fixed at the upper part of the tower body; a plurality of layers of horizontal grid-typed damp internal components are arranged between the liquid distributor and the liquid collector; the heat exchanging row tube bundle vertically passes through the horizontal grid-typed damp internal components; each layer of the grids is fixed on the tower wall and the row tubes; and by arranging the horizontal grid-typed damp internal components in the slurry bubble tower which is provided with vertical row tube bundles; and the horizontal damp internal components block the flowing of the slurry and air bubbles in the tower, inhibit the flowing craggedness effect caused by the row tube bundle, and reduce the returned mixing of the fluid, thus improving the flowing characteristic of the slurry reactor.

Description

technical field [0001] The invention relates to a method and a device for improving the flow characteristics of a slurry bubble column with heat exchange tubes. Background technique [0002] Gas-liquid bubble tower or gas-liquid-solid three-phase bubble reactor (also known as slurry bed bubble tower) is a reaction device widely used in many fields such as chemical industry, energy, environment, biochemistry, etc. It is used for gas-liquid Two-phase or gas-liquid-solid three-phase mass transfer and reaction operations, such as Fischer-Tropsch synthesis, hydroliquefaction, carbonylation, oxidation, halogenation, fermentation, gas absorption and other processes. There are two main difficulties encountered in the design and scale-up of slurry bed reactors, one is the heat transfer problem, and the other is the back-mixing problem. For the heat transfer problem of the reactor, industrial bubble column or slurry bed reactors generally install dense vertical tube bundles in the be...

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Problems solved by technology

Patent [9] proposes to set up multiple vertical jacketed cylinders in the tower, the air bubbles and slurry flow inside and outside the cylinders, and the cooling medium flows through the jackets. It is believed that this arrangement can improve fluid backmixing and improve reactor performance , however, none of the above measures are directly supported by flow measurement data

[0005] Recently, the inventors used special experimental techniques to measure the velocity distribution and gas holdup distribution in the bubble column installed with vertical tube bundles in detail, and found that after the vertical tube bundles were added, the flow velocity distribution and gas holdup distribution would not It tends to be flat, but it will make it steeper (see Comparative Example 1), which makes the gas-liquid backmixing more serious, and the reactor with heat exchange tubes is more difficult to scale up than the empty tower

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