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Composite column plate with coupling of inclined strip-shaped three-dimensional cover hood and regular fillers

A technology of structured packing and composite tower, applied in the field of separation equipment, can solve the problems of increasing gas-liquid contact time, affecting the mass transfer performance of vertical sieve plate, reducing mist entrainment, etc., to increase gas-liquid contact time and strengthen air mixing intensity and interface update rate, reducing the effect of mist entrainment

Active Publication Date: 2014-01-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This composite tray makes full use of the space inside the tower, increases the gas-liquid contact time, strengthens the airflow mixing intensity and cross-section renewal rate, greatly reduces the mist entrainment, and improves the efficiency of the tray; however, due to the gas-liquid impact in the long cap Mixed to form a complete back-mixing of the liquid, and the gas-liquid sprayed into the structured packing block outside the cap also has serious liquid back-mixing, which becomes a bottleneck for improving mass transfer performance
So far, the liquid back-mixing phenomenon in the long cap has not been paid attention to and solved, which affects the further improvement of the mass transfer performance of the vertical sieve plate

Method used

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  • Composite column plate with coupling of inclined strip-shaped three-dimensional cover hood and regular fillers
  • Composite column plate with coupling of inclined strip-shaped three-dimensional cover hood and regular fillers
  • Composite column plate with coupling of inclined strip-shaped three-dimensional cover hood and regular fillers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1, such as figure 1 , figure 2 As shown, the composite tray of the present invention is mainly made up of tray 1, elongated hole 2, inclined strip cap 5 with partition, trapezoidal structured packing 3 and bead 6; A full-circle support ring on the outer wall is fixed. Tray 1 is a flat plate with a plate thickness of 3-5mm, and there are long rectangular holes equivalent to 10%-60% of its area evenly spaced on it, the rectangular hole is 60mm wide, and the length is 90% of the plate length; 2 and the length of the strip cap 5 are determined according to the outer wall length direction spacing of the position, the middle one is long, and the two sides are short.

[0026] A long cap 5 with a gap of 3 to 15 mm between the bottom and the tray is provided on the long hole 2. The long cap 5 can be welded to the tray 1 through several steel feet, or can be welded by several bolts. Fixes directly to the retaining ring on the outer wall. There is preferably a gap of...

Embodiment 2

[0028] Embodiment 2, each elongated hole 2 replaces elongated rectangular hole with elongated positive splayed nozzle hole, and the hole width is 40mm, and the rest is the same as embodiment 1.

Embodiment 3

[0029] Embodiment 3, each elongated hole 2 replaces the elongated rectangular hole with an elongated nozzle hole (4 sides of the hole all extend upwards), the hole width is 80 mm, and the rest are the same as in Example 1.

[0030] The composite tray provided by the present invention coupled with the inclined strip three-dimensional cap and the structured packing is measured by the laboratory cold model experiment, and the efficiency of the air Murfree plate exceeds 90% within the range of the superficial air velocity of 0.5-10.0m / s. It is more than 40% higher than the F1 valve tray; the mist entrainment is less than 0.2%, and the pressure drop is 35% smaller than that of the F1 valve tray; the maximum empty tower kinetic energy factor is as high as 12 (m / s). (kg / m3) 1 / 2 or more, which is more than 6 times higher than that of ordinary trays, the processing capacity is increased by more than 3 times, and the operating flexibility is 7. The composite tray coupled with inclined ...

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Abstract

The invention provides a composite column plate with coupling of an inclined strip-shaped three-dimensional cover hood and regular fillers. According to the composite column plate, the inclined strip-shaped cover hood, which is wide in bottom and narrow in top, is internally provided with separating plates and is separated into a plurality of areas by the separating plates; the strip-shaped cover hood has holes for mounting sectional downwards-inclined shutters; the shutters have holes on the outside surface of the strip-shaped cover hood along the length direction; the shutters comprise a plurality of downwards-inclined strip-shaped plates which are arranged at intervals; the aperture ratio of the shutters on the side surface of the strip-shaped cover hood is 80% to 300% of that of the column plate; and regular filler blocks are arranged outside the inclined strip-shaped cover hood. With the adoption of the composite column plate, the pressure release is reduced, the entrainment is reduced, the back-mixing is reduced, the mass transfer quality is improved, the mass transfer efficiency and the processing capacity of the column plate are greatly improved, and the utilization rate of the space in the column can be improved.

Description

technical field [0001] The invention relates to the field of separation equipment, in particular to a composite tray which further improves the mass transfer performance and couples the oblique long three-dimensional cap and the structured packing. Background technique [0002] Trays and packings are widely used in chemical unit processes such as distillation, absorption, extraction, adsorption, washing, and cooling. Packing has the advantages of high separation efficiency, small pressure drop, and large processing capacity, but the cost is high, the operating flexibility is small, and the requirements for matching column internals are high; the tray has high operating flexibility, anti-clogging, low cost, but large pressure drop , The separation efficiency is small and the processing capacity is low. The trays can be divided into three types according to the direction of air flow, namely cross-flow type, counter-flow type and parallel-flow type. The performance of the exis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/20
Inventor 田原宇乔英云
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)