RU2257933C2 - Distributing-contacting device - Google Patents

Abstract

FIELD: chemical industry; petrochemical industry; heat-and-power engineering and other industries.

SUBSTANCE: the invention is pertaining to distributing-contacting devices for the mass-exchange devices and may be used in chemical industry, petrochemical industry, heat-and-power engineering and other branches of industry. The distributing-contacting device contains a distribution plate supplied with a screen with holes, overflow branch-pipes, overflow devices, deflecting shields, perforated truncated cones. The perforated truncated cones are made out of a sheet of no more than 1 mm thick with shutter-type splits of a width -"S" equal to 0.3-0.5 mm, and with a step not exceeding the thickness of the sheet and with an inclination in direction of the liquid motion at an angle α equal to 30-45°, the ratio of the length "1" to its width "S" is from 13 up to 25, a direction of the shutter channels to the horizontal axis of coordinates is at an angle β is equal to 30-45° and the overflow branch-pipes. At that for the packed columns on the ends of the drain branch-pipes at the calculated space intervals there are spray washers, and for plate-type columns the liquid from the drain branch pipes is fed onto an underlying sheet of a plate through a hydraulic lock. The presented distributing-contacting device ensures a high efficiency of the mass-exchange parameters in a wide range of a stable operation of packed columns and in the plate column apparatuses.

EFFECT: the invention ensures a high efficiency of the mass-exchange parameters in a wide range of a stable operation of the packed columns and the plate column apparatuses.

3 cl, 3 dwg

Description

The invention relates to distribution and contact devices for mass transfer apparatus in chemical technology, petrochemicals, thermal power and other industries.

Known mine collector-distributor, including the canvas with holes and overflow nozzles with jack peaks, p.15, 16 [1].

The disadvantage of this design is the practical lack of contact between the liquid and gas, leading to a decrease in the efficiency of using the volume of the apparatus.

Closest to the claimed object is a switchgear, including a distributor plate, equipped with a canvas with holes, overflow nozzles, bumpers, overflow devices and perforated truncated cones [2].

The disadvantage of this switchgear is the inability to use it in mass transfer separation columns.

The invention is aimed at creating an effective distribution-contact device for mass transfer separation columns.

This is achieved by the fact that in a distribution contact device including a distribution plate provided with a web with holes, overflow nozzles, overflow devices and perforated truncated cones, perforated truncated cones are made of a sheet with a thickness of not more than 1 mm, with louvered slots of width S equal to 0 , 3-0.5 mm, with a step equal to not more than the thickness of the sheet, with a slope in the direction of fluid movement at an angle α equal to 30-45 °, a ratio of length 1 to its width S from 13 to 25, the direction of the louvre channels to the horizontal second coordinate axis at an angle β, equal to 30-45 °, and drain pipes connected to the small diameter of the truncated cone, the output of which on the estimated distance set spray washer, using the device in packed columns. In dish-shaped columns, liquid from the drain pipes to the underlying sheet enters through a water seal.

Figure 1 shows a General view of the distribution contact device in the packed column; figure 2 shows a General view of the distribution contact device in a disk column; figure 3 shows a fragment of a sheet with louvered slots.

The distribution contact device is a distribution plate equipped with a web with openings 1, overflow nozzles 2, overflow devices 3, baffle plates 4, perforated truncated cones 5, drain pipes 6, spray washers 7 for packed columns, hydraulic locks 8 for plate columns, sheet 9 with louvre slots 10 of width S equal to 0.3-0.5 mm, with a step equal to not more than the thickness of the sheet, with an inclination in the direction of fluid movement at an angle α equal to 30-45 °, the ratio of length 1 to its width S from 1 3 to 25, the direction of the louvre channels 11 to the horizontal coordinate axis at an angle β equal to 30-45 °.

Distribution contact device operates as follows.

The fluid collected on the canvas 1, through the overflow device 3 is fed into the perforated truncated cones 5. The flowing fluid flows are distributed on the inner surface of the perforated cones 5 in the form of a thin film and are gradually twisted due to the multi-helical lines formed by the louvre channels 11, enter the drain pipes 6. At the outlet of the nozzles, the fluid flow strikes the spray washers 7 and is evenly distributed over the surface of the nozzle cross section. In the dish column, the fluid flow from the drain pipe 6 is supplied to the underlying plate through a water trap 8 formed by the liquid level on the plate and the drain pipe 6. Gas passes through the louvre slots 10 of the perforated truncated cones 5, sparges through a twisted thin film of liquid and goes up. The use of perforated truncated cones of the sheet 9 with louvre slots 10 of width S equal to 0.3-0.5 mm, with a step equal to not more than the thickness of the sheet, with a slope in the direction of fluid movement at an angle α equal to 30-45 °, the ratio length 1 to its width S from 13 to 25, the direction of the louvre channels 11 to the horizontal coordinate axis at an angle β equal to 30-45 °, ensures the absence of liquid dip and a high mass transfer coefficient even at low gas flow rates.

The advantage of the proposed design of the distribution-contact device is due to the high efficiency of the mass transfer indicators in a wide range of stable operation, as a result of which it can be widely used in packed and disk column devices.

List of used literature.

1. SULZER company prospectus No. 22 06/13/04 "Separation columns for distillation and absorption", prepared by the editors of the journal "Chemical and Petroleum Engineering", Moscow, 1993, p. 15, 16.

2. Patent RU No. 2127147, class 6 B 01 J 8/04, 8/00, published March 10, 1999, Bull. Number 7.

Claims (3)

1. Distribution-contact device, comprising a distribution plate equipped with a sheet with holes, overflow nozzles, overflow devices, chipping visors, perforated truncated cones, characterized in that the perforated truncated cones are made of a sheet with a thickness of not more than 1 mm with louvre slots of width S, equal to 0.3-0.5 mm, with a step equal to not more than the thickness of the sheet, with a slope in the direction of fluid movement at an angle α equal to 30-45 °, the ratio of length l to its width S from 13 to 25, the direction of the louvre channels fishing to the horizontal coordinate axis at an angle β equal to 30-45 °, and drain pipes. 2. The distribution contact device according to claim 1, characterized in that spray washers are installed at the ends of the drain pipes at a calculated distance. 3. The distribution contact device according to claim 1, characterized in that the liquid from the drain pipes to the underlying plate blade enters through a water seal.

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