Gas-liquid mass transfer element

A gas-liquid mass transfer and element technology, applied in the field of gas-liquid mass transfer elements of rectification trays, can solve problems such as affecting tray efficiency, increasing tray pressure drop, obstruction and disturbance, and simplifying design and processing difficulties , Avoid large liquid level drop, strengthen the effect of promoting

Active Publication Date: 2015-07-22
WANHUA CHEM GRP CO LTD +1
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AI Technical Summary

Problems solved by technology

[0005] In addition, for the plate tower, the core is the gas-liquid contact element, and when the fluid on the plate flows through the gas-liquid contact element, it is bound to be hindered and disturbed, resulting in non-ideal flow phenomena such as turbulence and stagnation, thereby affecting the tray efficiency ; Some occasions with relatively high flow requirements, such as reactive distillation, serious non-ideal flow will also affect the reaction conversion and selectivity
However, there are not many studies on the influence of the shape of the gas-liquid contact element on the liquid flow on the plate. At present, the most widely used bubble caps, float valves, and sieve trays use a large number of circular and rectangular gas-liquid contact elements. Differential spraying around or on both sides, the existence of gas and liquid flow in the opposite direction, resulting in serious turbulence and stagnation, affecting the continuous improvement of tray efficiency, and increasing the tray pressure drop, limiting production capacity

Method used

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Examples

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Effect test

Embodiment 1

[0048] Benzene-carbon tetrachloride separation system. The original tower diameter is 500mm, single downcomer type, the downcomer section shape is bow-shaped, and the downcomer area accounts for 10%; standard DN80 bubble caps are used, and each tray has 36 bubble caps, arranged in 5 rows. There are 12 boards. Adopting the present invention, the tower diameter and the form of the tray remain unchanged, and it is still a single downcomer type, and the downcomer, plate spacing, weir length, number of trays, riser height, cap height, etc. are all unchanged; the original Blister (round blister with air outlet slits, as attached figure 1 (as shown in the schematic diagram) is replaced by a streamlined oval-shaped guide hole blister, the schematic diagram is attached image 3 , the side facing the overflow weir has denser openings. The opening direction of the tooth gap and the straight line direction from the inlet weir to the outlet weir form an angle of 45-0 degrees, and the an...

Embodiment 2

[0051] Ethanol-water rectification system. The diameter of the original tower is 1200mm, a total of 38 trays, the opening rate is 12%, the plate spacing is 450mm, and the traditional F1 float valve is used. Keep the opening ratio and the plate spacing constant, only use the whale-shaped guide float valve among the present invention (as attached Figure 5 As shown) the tray replaces the original tray (as attached Figure 4 shown). The float valve is whale-shaped and streamlined, which gradually changes from thick to thick at the front and thin at the back. The valve length is 100mm, the front end is 35mm, the rear end is 65mm, and the maximum width is 45mm. There are 2 guide holes on the valve cover, with a height of 3mm and a width of 20mm, in the shape of a solid valve facing the direction of the overflow weir. The front legs are 8mm wide and 12mm long, and the rear legs are the same. There is a baffle perpendicular to the bonnet under the bonnet, the shape is the same a...

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Abstract

The invention discloses a streamlined distributing gas-liquid mass transfer element and relates to gas-liquid mass transfer equipment in the industrial field of chemical engineering and the like. According to the novel gas-liquid mass transfer element, a traditional circle or rectangle is replaced by a streamlined shape, distributing fins are arranged beside tooth slots or holes which are used for the passing of gas on the element, and the tooth slots or the holes and the distributing fins are not uniformly distributed, so as to push liquid to uniformly and steadily flow to the maximum degree when the gas passes through the tooth slots or the holes. By using the gas-liquid mass transfer element, the obstruction and disturbance borne by fluid can be reduced when the fluid flows through a gas-liquid contact element, liquid level drop is reduced, and the phenomena of flowing vortices and stagnation of the fluid on a tower plate are reduced or eliminated, so that materials are pushed to uniformly and steadily flow on the tower plate and uniform mass transferring of gas and liquid is promoted, so that the efficiency of the tower plate and the production capability can be improved.

Description

technical field [0001] The invention relates to a streamlined gas-liquid mass transfer element with a guiding function, which belongs to the gas-liquid mass transfer equipment in chemical engineering and other industrial fields, in particular to the gas-liquid mass transfer device for rectification (including absorption and gas stripping) trays mass transfer element. Background technique [0002] After nearly two centuries of development, traditional distillation technology has made great progress. Researchers have developed various trays and gas-liquid mass transfer elements. However, there are still some aspects to be improved on the current trays, one of which is to continue to improve the mass transfer efficiency of the trays. [0003] There are many factors that affect the efficiency of the tray, and the flow state of the liquid on the tray is one of them. Studies in recent years have shown that the flow of liquid on traditional trays is not a very regular flow, but t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/14B01D3/32
Inventor 何岩员玫黎源赵磊张俊华成兆坤
Owner WANHUA CHEM GRP CO LTD
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