RU2806146C1 - Rotary spray mass transfer apparatus - Google Patents

Abstract

FIELD: gas industry; chemical industry; oil refining industry.

SUBSTANCE: invention relates to rotary-type mass transfer devices for carrying out mass transfer processes between gas (steam) and liquid and can be used in the gas, chemical and oil refining industries. A rotary spray mass transfer apparatus is revealed, which contains a cylindrical body, a rotating shaft, an electric motor, and also phase supply devices. In this case, flat rectangular blades with flat vertical plates are attached to the shaft. The angle between the plane of the flat blade and the plane of the flat vertical plate is 90°. Fixed sieve trays with fixed drain pipes are attached to the wall of the apparatus. Along the height of the apparatus, rotating flat rectangular blades alternate with stationary sieve plates. There is also an annular gap between the rotating shaft and the stationary sieve plate.

EFFECT: increase in intensity of mass transfer processes and a reduction in the cost of metal for manufacturing the apparatus.

1 cl, 4 dwg

Description

The invention relates to rotary-type mass transfer devices for carrying out mass transfer processes between gas (steam) and liquid and can be used in the gas, chemical and oil refining industries.

Rotary film mass transfer column, described in the author's certificate SU 1457945 A1 (authors Shafranovsky A.V., Shmelev S.L., Olevsky V.M., Kurkovskaya V.V.), containing a vertical body, a coaxial shaft, contact steps, reinforced on the shaft and consisting of spiral tapes twisted around it, flanged at the edges and a central distribution cup, annular liquid collectors installed under the contact stages on the inner surface of the housing, and trays located between the stages, communicating with the collectors and having a drain to the underlying stages.

Common features with the proposed design of a rotary spray mass transfer apparatus are the presence of a vertical body (column), a rotating shaft, and rotating contact stages.

The disadvantage is the insufficiently high intensity of mass transfer and high metal costs for the manufacture of the apparatus.

Disc-film absorber, described in the source [Absorption of gases. Ramm V.M., second edition, revised and expanded, M., Khimiya Publishing House, 1976, on page 322, fig. IV-17, a], consists of a horizontal cylindrical body and a horizontal shaft with perforated disks attached to it. A certain level of liquid is maintained in a horizontal cylinder. A horizontal shaft with perforated disks mounted on it rotates inside the cylinder. The surface of the disks protruding above the liquid surface is covered with a liquid film; Mass transfer occurs on the surface of this film. The peripheral speed of rotation of the disks is 0.2-0.3 m/s.

Common features with the proposed design of a rotary spray mass transfer apparatus are the presence of a cylindrical body (column) and a rotating shaft.

The disadvantages are similar to the previous analogue.

The rotary mass transfer apparatus described in patent SU 1101247 A contains a vertical cylindrical housing, horizontal contact plates installed in the housing and dividing it into contact zones, a shaft located in the housing along its axis and passing through the plates, circulation cylinders mounted on the shaft above plates, turbulators radially mounted on the cylinders and made with a longitudinal slot, and overflow devices connecting the contact zones to each other, while the apparatus is equipped with meshes covering the longitudinal slots of the turbulators made with an elliptical cross section.

Common features with the proposed design of a rotary spray mass transfer apparatus are the presence of a cylindrical body (column), a rotating shaft, and overflow devices.

The disadvantages are similar to the previous analogue.

The closest in design (prototype) is the rotary-disk column extractor described in the source [Basic processes and apparatus of chemical technology. Kasatkin A.G., ninth edition, corrected, M., Khimiya Publishing House, 1973, on page 544, fig. XIII-22]. A rotary-disc column extractor consists of a housing, annular partitions, a rotor, a drive, and phase distributors. In this extractor, ring partitions are fixedly fixed inside the body at equal distances from each other. A shaft with horizontal flat disks runs vertically along the axis of the column, driven into rotation by a drive. The rotor disks are placed symmetrically relative to the partitions, with each two adjacent annular partitions and the disk between them forming a column section.

Common features with the proposed design of a rotary spray mass transfer apparatus are the presence of a cylindrical body, a rotating shaft, a drive (electric motor), and phase supply devices.

The disadvantage is the insufficiently high intensity of mass transfer and high metal costs for the manufacture of the apparatus.

The objective of the invention is to create a new highly efficient rotary type spray mass transfer apparatus for carrying out mass transfer processes between gas (steam) and liquid.

The technical result of the invention is:

- increasing the intensity of mass transfer processes;

- reducing metal costs for the manufacture of the device.

The elimination of these disadvantages and the achievement of the claimed technical result from the implementation of a new rotary spray mass transfer apparatus is achieved due to the fact that flat rectangular blades with flat vertical plates are attached to the shaft, and the angle between the plane of the flat blade and the plane of the flat vertical plate is 90°, with in this case, the liquid moves due to centrifugal force along a flat rectangular blade towards the wall of the apparatus, and when the liquid hits a flat vertical plate, the liquid comes off and is thrown up, contacts the gas (steam) and returns down to the flat parallel blade, which leads to to turbulization, atomization, dispersion of liquid and to increase the intensity of mass transfer, and as a result, to reduce metal costs for the manufacture of the apparatus, there are also stationary sieve trays with drain pipes, while the sieve trays are attached to the column body, while rotating flat ones along the height of the apparatus rectangular blades alternate with stationary sieve trays, while gas (steam) passes through the holes in the sieve trays from the bottom up and prevents the flow of liquid through the holes in the sieve trays; also, between the rotating shaft and the stationary sieve tray there is an annular gap through which gas (steam) passes ) down up.

A distinctive feature of the claimed invention is the placement of flat rectangular blades with flat vertical plates on the shaft, while the angle between the plane of the flat blade and the plane of the flat vertical plate is 90°, while the liquid moves due to centrifugal force along the flat rectangular blade towards the wall of the apparatus, and, when the liquid hits a flat vertical plate, the liquid comes off and is thrown up, comes into contact with the gas (steam) and falls down onto a flat parallel blade, which leads to turbulization, atomization, dispersion of the liquid and an increase in the intensity of mass transfer, and as a result, to reducing metal costs for the manufacture of the device. The apparatus also has fixed sieve plates with drain pipes. Sieve trays are attached to the column body, while along the height of the apparatus, rotating flat rectangular blades alternate with stationary sieve trays, while gas (steam) passes through the holes in the sieve trays from the bottom up and prevents the flow of liquid through the holes in the sieve trays. In this case, between the rotating shaft and the stationary sieve plate there is an annular gap through which gas (steam) passes from bottom to top.

The essence of the proposed rotary spray mass transfer apparatus is illustrated by drawings (Figs. 1-4). List of figures:

Fig. 1. General view of a rotary spray mass transfer apparatus.

Fig. 2. Top view of flat rectangular blades with flat rectangular plates.

Fig. 3. Top view of the sieve plate.

Fig. 4. General view of flat rectangular blades with flat rectangular plates.

Figure 1 shows a general view of the inventive rotary spray mass transfer apparatus. Figure 2 shows a top view of flat rectangular blades with flat rectangular plates. Figure 3 shows a top view of the sieve plate. Figure 4 shows a general view of flat rectangular blades with flat rectangular plates.

The inventive rotary spray mass transfer apparatus (Fig. 1-4) consists of a vertical housing (column) (1), a rotating coaxial shaft (2), an electric motor (3), fixed sieve plates (4), drain pipes (5), flat blades (6), flat vertical plates (7), gas (steam) supply device (8), bearings (9), liquid outlet pipe (10), gas (steam) outlet pipe (11), liquid supply device (12 ), holes (13) in the sieve trays (4), annular gap (14) between the shaft (2) and the sieve tray (4). The angle between the plane of the flat blade (6) and the plane of the flat vertical plate (7) is 90°.

The proposed rotary spray mass transfer apparatus, designed for carrying out mass transfer processes between gas (steam) and liquid, operates as follows. Gas (steam) is supplied to the bottom of the apparatus through the gas (steam) supply device (8), distributed evenly over the cross section of the apparatus using a sieve plate (4), passes through the holes of the sieve plate (4) and rises up the apparatus. Gas (steam) can also pass through the annular gap (14) between the rotating shaft (2) and the stationary sieve plate (4). When rising, the gas (steam) passes between the rotating flat rectangular blades (6) and comes into contact with the sprayed liquid. Gas (steam) leaves the apparatus (1) through the pipe (11). The liquid enters the column (1) through the liquid supply device (12), is supplied to rotating flat rectangular blades (6) having flat vertical plates (7), then the liquid moves due to centrifugal force along the flat rectangular blade (6) towards wall of the column (1), while when the liquid hits the flat vertical plate (7), the liquid comes off and is thrown up, contacts the gas (steam) and returns down to the flat rectangular blade (6), which leads to turbulization, atomization, dispersion of the liquid and an increase in the intensity of mass transfer, and as a result, a reduction in metal costs for the manufacture of the apparatus. Next, the liquid flows onto the underlying flat rectangular blades (6) and comes into contact with gas (steam). Next, the liquid comes into contact with gas (steam) on a stationary sieve plate (4). In this case, the liquid flows from the stationary sieve plate (4) through the drain pipe (5) onto the underlying rotating flat blades (6). Liquid cannot drain through the holes (13) of the sieve plate (4), gas (steam) passes through these holes from bottom to top. Thus, intensive repeated contact of liquid with gas (steam) occurs along the height of the column (1), which leads to turbulization, atomization, dispersion of the liquid and an increase in the intensity of mass transfer, and as a consequence, a reduction in metal costs for the manufacture of the apparatus.

LITERATURE

1. Copyright certificate SU 1457945 A1. Rotary film mass transfer column. Authors: Shafranovsky A.V., Shmelev S.L., Olevsky V.M., Kurkovskaya V.V. Publ. 02/15/1989. Bull. No. 6.

2. Ramm V.M. Absorption of gases. Second edition, revised and expanded. M., Publishing house "Chemistry", 1976, on page 322, fig. IV-17, a.

3. Copyright certificate SU 1101247 A. Rotary mass transfer apparatus. Authors: Odintsov A.V., Brezgin B.N., Zhilin I.F., Kroshkin G.S. Publ. 07/07/1984, Bulletin. No. 25.

4. Kasatkin A.G. Basic processes and apparatuses of chemical technology. Ninth edition, revised. M., Publishing house "Chemistry", 1973, on page 544, fig. XIII-22.

Claims (1)

A rotary spray mass transfer apparatus containing a cylindrical body, a rotating shaft, an electric motor, and phase supply devices, characterized in that flat rectangular blades with flat vertical plates are attached to the shaft, and the angle between the plane of the flat blade and the plane of the flat vertical plate is 90°, at In this case, stationary sieve trays are attached to the wall of the apparatus, while the stationary sieve trays have stationary drain pipes, while along the height of the apparatus, rotating flat rectangular blades alternate with stationary sieve plates, and there is an annular gap between the rotating shaft and the stationary sieve plate.

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