Concentric ring ultra-gravity rotating bed with gas diversion function

Abstract

The concentric ring supergravity rotating bed with gas diversion function has a rotor in the shell, the rotating shaft of the rotor penetrates the shell, and the liquid inlet pipe penetrates the shell and the axial chamber of the rotor from the upper part of the shell; the upper part of the liquid inlet pipe is open and the bottom is closed, and a liquid outlet hole is provided on the tube wall of the liquid inlet pipe; the gas outlet pipe is connected to the axial chamber of the rotor; a group of concentric rotating circles with different diameters are connected between the upper rotating disk and the lower rotating disk of the rotor, and the rotating circles are provided with round holes and oblique holes; the plates on the rotating circles are turned up to form oblique holes, and the openings of the oblique holes are parallel to the rotation direction of the rotating circles. The oblique holes on the two adjacent groups of concentric rotating circles guide the gas to flow in a zigzag shape in the radial direction, increase the gas turbulence, improve the gas phase mass transfer coefficient of the rotating bed, and then improve the gas-liquid mass transfer rate of the rotating bed; at the same time, it has the advantages of small pressure drop and small rotor liquid holdup.

Description

Technical Field

[0001] The invention relates to a gas-liquid mass transfer device, in particular to a concentric ring ultra-gravity rotating bed with a gas flow guiding function. Background Art

[0002] Supergravity technology is an emerging chemical process intensification technology that can greatly improve production efficiency. Its principle is to generate a centrifugal field by rotating the rotor, and use the centrifugal field to simulate the supergravity field. Under the supergravity field, the liquid is torn into micron-sized droplets, liquid foam and liquid film, which greatly enhances the gas-liquid mass transfer process. Compared with traditional plate towers and packed towers, the gas-liquid mass transfer rate of the supergravity rotating bed can be increased by 1 to 2 orders of magnitude. The supergravity rotating bed has the advantages of small equipment size, low cost, small footprint, and easy installation.

[0003] The concentric countercurrent type ultra-gravity rotating bed disclosed in Chinese patent 200710157094.3 has a rotor including a concentric mesh moving ring, which is composed of a group of concentric rotating rings with meshes of different diameters. The rotating bed has the advantages of small pressure drop and small rotor liquid holdup, but the gas-liquid mass transfer rate of the rotating bed is not high, which is limited in industrial application. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, a concentric ring ultra-gravity rotating bed with a gas diversion function is provided. The rotating bed has a high gas-liquid mass transfer rate and a small pressure drop and rotor liquid holdup.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A concentric ring ultra-gravity rotating bed with a gas diversion function, wherein a rotor is arranged in a shell 2, a gas inlet is arranged on the side of the shell 2, a liquid outlet is arranged on the bottom plate of the shell 2, the rotating shaft of the rotor penetrates into the shell 2 from the bottom plate of the shell 2, a liquid inlet pipe 7 penetrates into the axial chamber of the shell 2 and the rotor from the upper part of the shell 2, and the liquid inlet pipe 7 is coaxially installed with the rotating shaft of the rotor; the upper part of the liquid inlet pipe 7 is open and the bottom is closed, and a liquid outlet hole 11 is arranged on the tube wall of the liquid inlet pipe 7; a gas outlet pipe 8 is arranged on the upper panel of the shell 2, and the gas outlet pipe 8 is connected to the axial chamber of the rotor; the rotor comprises an upper rotating disk 6 and a lower rotating disk 4, a group of concentric rotating circles 5 with different diameters are connected between the upper rotating disk 6 and the lower rotating disk 4, and a circular hole 14 and an inclined hole 13 are opened on the rotating circle 5; a plate 12 on the rotating circle 5 is turned up to form an inclined hole 13, and the opening of the inclined hole 13 is parallel to the rotation direction of the rotating circle 5;

[0007] Preferably, the inclined holes on adjacent rotating circles 5 are turned inward or outward, and the opening direction of the inclined holes on one rotating circle is the same as the rotating direction of the rotating circle, and the opening direction of the inclined holes on the other rotating circle is opposite to the rotating direction of the rotating circle.

[0008] Alternatively, the opening directions of the inclined holes on adjacent rotating circles 5 are the same as or opposite to the rotation direction of the rotating circle 5, and the inner side of the inclined hole of one rotating circle is turned up, while the outer side of the inclined hole of the other rotating circle is turned up.

[0009] Furthermore, the plate 12 of the inclined hole 13 is a rectangular plate, or a semicircular plate, or a triangular plate, or a trapezoidal plate.

[0010] The inclined holes on two adjacent groups of concentric rotating circles have their openings turned up on the same side of the rotating circles, and the opening direction is opposite to the rotating direction of the rotating circles, guiding the gas to flow in a zigzag shape in the radial direction.

[0011] The beneficial effects of the present invention are as follows: the rotating bed rotor comprises a series of concentric rotating circles with oblique holes and circular holes, the oblique holes can guide the gas to flow in a zigzag shape in the radial direction, increase the gas turbulence, improve the gas phase mass transfer coefficient of the rotating bed, and thus improve the gas-liquid mass transfer rate of the rotating bed. At the same time, the rotating bed of the present invention still has the advantages of small pressure drop and small rotor liquid holdup. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of embodiment 1 of the present invention.

[0013] Figure 2 It is an exhibition review diagram on the concentric rotating circle of the rotor.

[0014] Figure 3 yes Figure 2 Schematic diagram of the BB cross-sectional structure.

[0015] Figure 4a It is the situation of turning up to the inside of the rotating circle; Figure 4b It is the situation of turning up to the outside of the rotating circle;

[0016] Figure 5a to Figure 5d The following are schematic diagrams of the inclined hole structures of four different shapes of plates. Figure 5a It is a rectangular plate;

[0017] Figure 5b It is a semicircular plate; Figure 5c It is a triangular plate; Figure 5d It is a trapezoidal plate.

[0018] Figure 6a and Figure 6b It is a schematic diagram of gas flow in which the inclined holes on adjacent rotating circles are all turned up inside or outside, but the opening direction of the inclined holes of one rotating circle is the same as the rotating direction of the rotating circle, and the opening direction of the inclined holes of the other rotating circle is opposite to the rotating direction of the rotating circle, wherein Figure 6a It is one of the situations. Figure 6b This is the second situation.

[0019] Figure 7 It is a schematic diagram of gas flow in which the opening direction of the inclined holes on adjacent rotating circles is the same as the rotating direction of the rotating circles, but the inner side of the inclined hole of one rotating circle is turned up, and the outer side of the inclined hole of the other rotating circle is turned up. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings.

[0021] Figure numerals: 1-rotating shaft, 2-housing, 3-liquid outlet, 4-lower rotating disk, 5-concentric rotating circle, 6-upper rotating disk, 7-liquid inlet, 8-gas outlet, 9-dynamic seal, 10-gas inlet, 11-liquid outlet hole of liquid inlet pipe, 12-turned plate, 13-inclined hole, 14-circular hole.

[0022] Example 1

[0023] like Figure 1 to Figure 6a As shown, a concentric ring ultra-gravity rotating bed with a gas diversion function of the present invention has a rotor arranged in a shell 2, a gas inlet arranged on the side of the shell 2, a liquid outlet arranged on the bottom plate of the shell 2, the rotating shaft of the rotor penetrates into the shell 2 from the bottom plate of the shell 2, and a liquid inlet pipe 7 penetrates into the axial chamber of the shell 2 and the rotor from the upper part of the shell 2, and the liquid inlet pipe 7 is coaxially installed with the rotating shaft of the rotor; the upper part of the liquid inlet pipe 7 is open and the bottom is closed, and a liquid outlet hole 11 is arranged on the tube wall of the liquid inlet pipe 7; the gas outlet pipe 8 is arranged on the upper panel of the shell 2, and the gas outlet pipe 8 is connected to the axial chamber of the rotor; the rotor comprises an upper rotating disk 6 and a lower rotating disk 4, and a group of concentric rotating circles 5 with different diameters are connected between the upper rotating disk 6 and the lower rotating disk 4, and a circular hole 14 and an inclined hole 13 are opened on the rotating circle 5; the plate 12 on the rotating circle 5 is turned up to form an inclined hole 13, and the opening of the inclined hole 13 is parallel to the rotation direction of the rotating circle 5;

[0024] like Figure 6a The inclined holes on adjacent rotating circles 5 are turned outward, and the opening direction of the inclined holes on one rotating circle is the same as the rotating direction of the rotating circle, and the opening direction of the inclined holes on the other rotating circle is opposite to the rotating direction of the rotating circle.

[0025] like Figure 5a to Figure 5d As shown, the plate with inclined holes can have different shapes, among which Figure 5a It is a rectangular plate; Figure 5b It is a semicircular plate; Figure 5c It is a triangular plate; Figure 5d It is a trapezoidal plate.

[0026] The working process of this embodiment is as follows: the gas enters the inner cavity tangentially from the gas inlet 10, and then enters the rotor. Driven by the rotating circle, the gas moves in a circumferential direction. At the same time, the gas flows radially in the rotor under the action of the pressure difference. A part of the gas passes through the inclined hole 13, and the other part passes through the circular hole 14. The gas flows in a zigzag shape in the radial direction under the guidance of the inclined hole. The gas turbulence is intensified, and the gas phase mass transfer coefficient is improved. Finally, it is discharged through the gas outlet 8; the liquid enters the rotor from the liquid inlet 7 through the liquid outlet hole 11 on the wall of the inlet pipe, and is thrown out under the action of centrifugal force. The liquid contacts the gas in the rotor in countercurrent, and mass transfer and heat transfer occur. Finally, it is discharged from the liquid outlet 3.

[0027] In this embodiment, the inclined hole openings on any adjacent concentric rotating circles have the same flipping direction, or are both outward, but the inclined hole openings are in opposite directions, one is the same as the rotation direction of the rotating circle, and the other is opposite to the rotation direction of the rotating circle, guiding the gas to flow in a zigzag shape in the radial direction.

[0028] When the present invention is used for distillation, the gas coming out of the reboiler enters the inner cavity of the shell 2 from the gas inlet 10, radially passes through the inclined hole 13 and the circular hole 14 on the concentric rotating circle 5 to enter the rotor, and contacts with the liquid in countercurrent, and finally enters the condenser through the gas outlet 8 for condensation to obtain a distillation product; part of the condensate enters from the liquid inlet 7 as reflux liquid and feed liquid, and then enters the inside of the rotor through the liquid outlet 11 on the liquid inlet pipe, and is accelerated and thrown out under the action of centrifugal force, and the liquid is crushed into fine liquid foam and liquid filaments, and contacts with the gas in countercurrent to carry out mass transfer and heat transfer, and the liquid enters the reboiler through the liquid outlet 3 for heating, and the distillation product is discharged from the reboiler.

[0029] Taking ethanol-water as the material system, a total reflux atmospheric distillation experiment was carried out with a concentric ring rotor with a sieve hole having an inner diameter of 400 mm, an outer diameter of 1000 mm, and a height of 100 mm and a concentric ring rotor with a gas diversion function of the present invention, at a supergravity rotating bed speed of 1200 r / min. The concentric ring rotor with sieve holes has a theoretical plate number of 3.5 to 5.1 plates, and the concentric ring rotor with a gas diversion function has a theoretical plate number of 20 to 25% higher than that of the concentric ring rotor with sieve holes, and the gas phase pressure drop is 85% to 90% of that of the concentric ring rotor with sieve holes, which shows that the concentric ring supergravity rotating bed with a gas diversion function is superior to the concentric ring supergravity rotating bed with sieve holes, and has broad prospects in industrial application.

[0030] Example 2

[0031] like Figure 1 to Figure 5d , Figure 6b As shown, the difference between this embodiment and embodiment 1 is that the tilting directions of the inclined hole openings on adjacent concentric rotating circles are all inward, which is the same as embodiment 1 in part.

[0032] Example 3

[0033] like Figure 1 to Figure 5d , Figure 7 As shown, the difference between this embodiment and embodiment 1 is that the opening directions of the inclined holes on adjacent rotating circles 5 are the same as the rotation direction of the rotating circle 5, and the tilting directions of the inclined holes on any adjacent concentric rotating circles 5 are different, one is inward and the other is outward, but the opening directions of the inclined holes are consistent, guiding the gas to flow in a zigzag shape in the radial direction.

[0034] Example 4

[0035] like Figure 1 to Figure 5d , Figure 7 As shown, the difference between this embodiment and embodiment 3 is that the opening directions of the inclined holes on adjacent rotating circles 5 are opposite to the rotation direction of the rotating circle 5, and part of it is the same as embodiment 1.

[0036] The contents described in the embodiments of this specification are merely an enumeration of the implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A concentric ring ultra-gravity rotating bed with a gas diversion function, wherein a rotor is arranged in a shell (2), a gas inlet is arranged on the side of the shell (2), and a liquid outlet is arranged on the bottom plate of the shell (2), characterized in that: The rotor shaft penetrates into the shell (2) from the bottom plate of the shell (2), the liquid inlet pipe (7) penetrates into the shell (2) and the axial chamber of the rotor from the upper part of the shell (2), and the liquid inlet pipe (7) is coaxially installed with the rotor shaft; the upper part of the liquid inlet pipe (7) is open and the bottom is closed, and a liquid outlet hole (11) is provided on the tube wall of the liquid inlet pipe (7); the gas outlet pipe (8) is provided on the upper panel of the shell (2), and the gas outlet pipe (8) is connected to the axial chamber of the rotor; the rotor comprises an upper rotating disk (6) and a lower rotating disk (4), and a group of concentric rotating circles (5) with different diameters are connected between the upper rotating disk (6) and the lower rotating disk (4), and the rotating circles (5) are provided with a circular hole (14) and an inclined hole (13); the upper plate (12) of the rotating circle (5) is turned up to form an inclined hole (13), and the opening of the inclined hole (13) is parallel to the rotation direction of the rotating circle (5); When the openings of the oblique holes on adjacent rotating circles (5) are both turned inward or turned outward, the opening direction of the oblique holes on one rotating circle is the same as the rotating direction of the rotating circle, and the opening direction of the oblique holes on the other rotating circle is opposite to the rotating direction of the rotating circle; or when the opening directions of the oblique holes on adjacent rotating circles (5) are both the same as or opposite to the rotating direction of the rotating circle (5), the inner side of the oblique holes of one rotating circle is turned up, and the outer side of the oblique holes of the other rotating circle is turned up.

2. The concentric ring ultra-gravity rotating bed with gas diversion function as claimed in claim 1, characterized in that: The plate (12) of the inclined hole (13) is a rectangular plate, or a semicircular plate, or a triangular plate, or a trapezoidal plate.

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