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Mass transfer tray and distillation column

A technology of mass transfer tower and distillation tower, which is applied in the field of chemical equipment, can solve the problems of liquid leakage, uneven distribution of gas phase, large bubble diameter, etc., and achieve the effect of not easy to coalesce, increase the area of ​​mass transfer phase boundary, and small diameter

Active Publication Date: 2022-03-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the diameter of the bubbles formed by this patent is smaller than that of the traditional tray, the diameter of the bubbles is still larger
As the pore size of the mass transfer material becomes larger, the diameter of its bubbles becomes larger and larger, accompanied by a certain amount of liquid leakage, and the gas phase cannot be evenly distributed in the entire tray area.

Method used

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  • Mass transfer tray and distillation column
  • Mass transfer tray and distillation column
  • Mass transfer tray and distillation column

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0047] Please refer to figure 1 , this embodiment provides a mass transfer tray 100, including a gas-liquid mass transfer layer 120 and a tray support mechanism 110 for installing the mass transfer tray 100 in a distillation column, and the gas-liquid mass transfer layer 120 is arranged on On the tray support mechanism 110, the mass transfer tray 100 is installed behind the distillation tower, and there is a gap for the liquid to descend between one end edge of the gas-liquid mass transfer layer 120 and the tower wall 11 of the distillation tower.

[0048] The pores 121 on the gas-liquid mass transfer layer 120 for dispersing gas have a diameter of 0.1-100 μm, and the porosity of the gas-liquid mass transfer layer 120 is 1%-80%.

[0049] During use, the tray supporting mechanism 110 is arranged on the tower wall 11 of the distillation tower, so that a gap (downhole 101) for the liquid to descend is formed between one end edge of the gas-liquid mass transfer layer 120 and the t...

no. 2 example

[0058] This embodiment is basically similar to the first embodiment, and the unmentioned parts refer to the first embodiment.

[0059] Such as Figure 5 As shown, the gas-liquid mass transfer layer 120 of the mass transfer tray 100 of this embodiment is made by sintering, and the pores 121 contained therein are also formed during the sintering process.

[0060] It should be noted that, in other embodiments of the present application, the gas-liquid mass transfer layer 120 can also be made by 3D printing or a combination of sintering and 3D printing.

[0061] Specifically, the material of the gas-liquid mass transfer layer 120 is metal, metal oxide, plastic, resin, ceramics, graphite, corundum or a mixture of at least two of the above materials.

[0062] Preferably, the upper surface of the gas-liquid mass transfer layer 120 is coated with a super-lyophobic coating. The super-oleophobic coating is, for example, a super-hydrophobic coating or a super-oleophobic coating, and th...

application example 1

[0082]The tray provided in the first embodiment is used. The pores 121 of the gas-liquid mass transfer layer 120 are uniformly arranged cylindrical channels with an opening ratio of 60%, a pore diameter of 100 μm, and a thickness of the mass transfer material of 5 mm. Through the cyclohexane-n-heptane system test, the efficiency of the microbubble tray is about 62% higher than that of the F1 valve tray, and about 16% higher than that of the microbubble overall tray.

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Abstract

The invention relates to the field of chemical equipment, and provides a mass transfer tray and a distillation tower. The mass transfer tower tray comprises a gas-liquid mass transfer layer and a tower tray supporting mechanism used for installing the mass transfer tower tray in the distillation tower, the gas-liquid mass transfer layer is arranged on the tower tray supporting mechanism, and after the mass transfer tower tray is installed in the distillation tower, a gap allowing liquid to descend is formed between the edge of one end of the gas-liquid mass transfer layer and the tower wall of the distillation tower; gas holes for dispersing gas are formed in the gas-liquid mass transfer layer, the aperture of the gas holes is 0.1-100 microns, and the porosity of the gas-liquid mass transfer layer is 1-80%. The distillation tower comprises a tower body and a plurality of mass transfer trays arranged in the tower body from top to bottom. The gas-liquid phase interface area can be stabilized at a large value, so that the mass transfer effect of the gas-liquid phase interface area is good, and the gas-liquid phase interface area can be stabilized at a large value.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a mass transfer tray and a distillation tower. Background technique [0002] Distillation is a thermodynamic separation method and is the most important separation method in the fields of oil refining and chemical industry. The separation principle is to use the different volatilities of the components in the liquid mixture to partially vaporize the liquid mixture and then partially condense the vapor, thereby realizing the separation of the components contained in it. The distillation process is generally carried out in a distillation column. Distillation towers are mainly divided into tray towers and packed towers, which correspond to trays and packing as the main mass transfer components in the tower. Plate towers account for more than 90% of tower equipment in refinery and chemical enterprises. In the plate tower, the gas-liquid two-phase contact is completed in the state...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/32B01D3/00
CPCB01J19/32B01D3/00
Inventor 王松江李国智赵远方孔令胜杜招鑫梁石生付春龙崔凌云高有飞
Owner CHINA PETROLEUM & CHEM CORP
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