Spiral step falling distribution type separating tower column plate

A separation tower, distributed technology, applied in the direction of distillation separation, separation methods, chemical instruments and methods, etc., can solve the problems of reduced effective use area, poor efficiency and operating flexibility, and achieve the goal of maintaining uniformity and increasing relative flow velocity Effect

Inactive Publication Date: 2009-04-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the traditional tray needs to be equipped with structures such as liquid receiving trays and downcomers, it needs to occupy a part of the tray, and at the same time consider the flow of gas and liquid, so that the effective use area of ​​the entire tray is greatly reduced; the through-flow tray Although the downcomer is omitted, its efficiency and operating flexibility are poor

Method used

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  • Spiral step falling distribution type separating tower column plate
  • Spiral step falling distribution type separating tower column plate
  • Spiral step falling distribution type separating tower column plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] For the ethanol-water rectification separation system, the diameter of the experimental tower used is 400mm. Originally, 5 traditional float valve trays were used for experiments. The ratio of the total cross-sectional area is about 82%, and the F1 type float valve is used. Adopt spiral step descending distributed separation column tray of the present invention, remove the circle of 1 / 9 area from the center of tray tray of equal size, then cut into equal parts into n=5 pieces, obtain 25 fan-shaped trays (1), press The spiral ladder method is welded to the support tube with the same diameter as the circle cut off from the tray. The total effective mass transfer area of ​​the tray is about 11% higher than that of the original tray, and the opening rate of the single plate is higher than that of the traditional valve tray. 10%, and the period of liquid flowing through the tray becomes longer, which is more conducive to the exchange between gas and liquid. It has been meas...

Embodiment 2

[0032] Air-water system, rectifying tower experimental tower diameter 800mm, respectively adopt traditional tray and fixing method and sector tray and fixing method described in the present invention; The ratio of the mass transfer area to the total area of ​​the tower is about 70%, and the installation height between the trays is 300mm. When fixed by spiral ladder descending method, cut each traditional tray into n=4 fan-shaped trays (1), the ratio of the center cut part to the total area of ​​the tray is 1:16, and the installation height between the fan-shaped trays (1) 75mm, the outlet of the overflow weir (2) adopts a tooth shape, the angle α between the tooth bottom line and the horizontal plane is 1°, the effective mass transfer area is increased by nearly 22% compared with the traditional monolithic tray, and the degree of liquid backmixing on the plate is obvious drop, the liquid level drops by nearly 50%, the entrainment of mist drops by nearly 40%, and the separation...

Embodiment 3

[0034]Ethanol-water system, the diameter of the experimental tower is 800mm, the ratio of the cut-off part of the center of the traditional tray to the total area is 1:16, and then it is equally divided into n=6 fan-shaped trays (1), a total of 6×10=60 pieces The fan-shaped tray (1) (the original tower is 10 trays), the overflow weir (2) adopts a flat head weir, and the angle α between the line connecting the top edge of the weir height and the horizontal plane is 2°, and every 3×6=18 blocks A downcomer (6) is arranged on the fan-shaped tray, and the area of ​​the downcomer (6) accounts for 1 / 2 of the area of ​​the fan-shaped tray (1), and the area of ​​the fan-shaped tray (1) below it is increased by 1 / 2 as the receiving Liquid tray, that is, cut the fan-shaped tray with the downcomer (6) into 1 / 8 size when cutting the traditional tray, and cut the fan-shaped tray with the liquid receiving tray into 3 / 8 size after the transformation. Compared with the original tray, the effec...

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Abstract

A separating tower plate in the type of helix steps down distribution, is an annular tower plate got from a whole traditional round tower plate after cutting a round of 1 / 25 to 1 / 4 of the area along the center. And then the annular tower plate is separated into n parts, wherein n is equal to 3 to 10, to get fan-shaped tower plates, which are mounted on the support pipe throughout the center of the separating tower in the type of helix steps down distribution. The total height between tower plates of a complete alternation circle is equivalent to the fixed height between plates of traditional tower. The adjacent two fan-shaped tower plates are connected by radial baffle, upper of which is higher than the former fan-shaped tower plate to form a liquid overflow weir. There are gas-liquid contacting components such as float valve, sieve pore or bubble cap and so on. The advantage of the separating tower plate in the type of helix steps down distribution of the invention resides that the utilization factor of the tower plate area is higher because whole or most liquid-falling area and liquid-accepting area are omitted, and resides that heat transfer and mass transfer between gas and liquid are more sufficiency because the liquid flows a longer way when flowing down a section tower height on the helix plate.

Description

field of invention [0001] The invention relates to a core part of a tray type separation tower - a tray. Background technique [0002] In the industrial production process of chemical industry, petrochemical industry and oil refining, it is often necessary to use a plate separation tower, also known as a plate separation tower, which is used to process various gas phase mixtures and liquid phase mixtures to achieve separation and purification. the goal of. There are also many types of plate separation towers, which are mainly divided according to the type of trays. The tray is the core of the plate separation tower, and it is the place where the gas-liquid contact conducts heat transfer and mass transfer; It is composed of liquid pan, overflow weir, downcomer, tray support and fasteners; according to the structural characteristics, it can be divided into two types: integral type and block type. Tray towers have been used for more than 100 years, and still occupy a very im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/24
Inventor 吴有庭彭璟周政张志炳孟为民
Owner NANJING UNIV
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