CN110721648A - Fixed valve concentric ring rotating bed for promoting axial distribution of liquid - Google Patents

Fixed valve concentric ring rotating bed for promoting axial distribution of liquid Download PDF

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Publication number
CN110721648A
CN110721648A CN201910908329.0A CN201910908329A CN110721648A CN 110721648 A CN110721648 A CN 110721648A CN 201910908329 A CN201910908329 A CN 201910908329A CN 110721648 A CN110721648 A CN 110721648A
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China
Prior art keywords
liquid
cavity
rotor
fixed
valve
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Withdrawn
Application number
CN201910908329.0A
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Chinese (zh)
Inventor
李育敏
陈加齐
赵志刚
朱星剑
胡晓斌
查道国
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Zhejiang Huake Chemical Equipment Co Ltd
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Zhejiang Huake Chemical Equipment Co Ltd
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Priority to CN201910908329.0A priority Critical patent/CN110721648A/en
Publication of CN110721648A publication Critical patent/CN110721648A/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • B01J19/1806—Stationary reactors having moving elements inside resulting in a turbulent flow of the reactants, such as in centrifugal-type reactors, or having a high Reynolds-number
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B01J19/0066—Stirrers

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  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

The invention discloses a fixed valve concentric ring rotating bed for promoting axial distribution of liquid, which relates to the field of gas-liquid mass transfer equipment and mainly comprises a cavity, wherein a rotor is arranged in the cavity, a rotating shaft of the rotor penetrates through the bottom plate of the cavity, a liquid inlet pipe penetrates through the cavity and a central cavity of the rotor from the upper part of the cavity and is coaxially installed with the rotating shaft, and a gas outlet pipe is arranged at the upper plate of the cavity and is communicated with the central cavity of the rotor; the rotor consists of an upper disc and a lower disc, a group of concentric rings with uniformly increased diameters are fixed between the upper disc and the lower disc, and a plurality of fixed valves are arranged on the concentric rings. The invention has the beneficial effects that: effectively increase the gas turbulence and increase the gas phase mass transfer coefficient of the rotating bed; the liquid obtains the velocity components of axial upward and axial downward after passing through the fixed valve, thereby promoting the axial distribution of the liquid, increasing the liquid phase mass transfer coefficient of the rotating bed, simultaneously increasing the gas phase and liquid phase mass transfer coefficients of the rotating bed, and improving the gas-liquid mass transfer efficiency of the rotating bed.

Description

Fixed valve concentric ring rotating bed for promoting axial distribution of liquid
Technical Field
The invention relates to the field of gas-liquid mass transfer equipment, in particular to a fixed valve concentric ring rotating bed for promoting axial distribution of liquid.
Background
As a novel process strengthening device, the hypergravity revolving bed can greatly reduce the volume of the device, thereby improving the production efficiency and reducing the cost, and is successfully applied to a plurality of chemical fields such as rectification, absorption and reaction. The principle of the super-gravity rotating bed is that a centrifugal force field is generated by rotating a rotor, the centrifugal force field is used for replacing a gravity field, and liquid is torn into micron-sized liquid drops, liquid foam and liquid films under the super-gravity field, so that the gas-liquid mass transfer process in the mass transfer and heat transfer processes among multiphase flows is greatly enhanced. Compared with the traditional plate tower and the traditional packed tower, the gas-liquid mass transfer rate of the super-gravity rotating bed can be improved by 1-2 orders of magnitude. The super-gravity rotating bed has the advantages of small equipment volume, low cost, small occupied area, convenience in installation and the like.
The present invention discloses a concentric ring counter-flow type super-gravity rotating bed disclosed in chinese patent 200710157094.3, wherein the rotor comprises a concentric sieve pore moving ring, and the moving ring is composed of a group of concentric rotating rings with different diameters and sieve pores. The rotating bed belongs to a plate-type rotor rotating bed, has the advantages of simple structure and low manufacturing cost, but has low mass transfer efficiency and is limited in industrial application.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a fixed valve concentric ring rotating bed for promoting the axial distribution of liquid, which has the advantage of higher gas-liquid mass transfer efficiency.
The purpose of the invention is achieved by the following technical scheme: the fixed valve concentric ring rotating bed for promoting axial distribution of liquid mainly comprises a cavity, wherein a rotor is arranged in the cavity, a dynamic seal is arranged between the rotor and the cavity, a gas inlet pipe is arranged on the side surface of the cavity, and a liquid outlet pipe is arranged on the bottom plate of the cavity; a rotating shaft of the rotor penetrates through a bottom plate of the cavity, a liquid inlet pipe penetrates through the cavity and the central cavity of the rotor from the upper part of the cavity, the liquid inlet pipe with an opening at the upper part and a closed bottom is coaxially arranged with the rotating shaft, and the pipe wall of the liquid inlet pipe is also provided with a plurality of liquid outlet holes; the gas outlet pipe is arranged on the upper panel of the cavity and communicated with the central chamber of the rotor; the rotor consists of an upper disc and a lower disc, a group of concentric rings with uniformly increased diameters are fixed between the upper disc and the lower disc, a plurality of fixed valves are arranged on the concentric rings, valve covers of the fixed valves protrude towards the outer sides of the concentric rings to form bottom holes and side holes of the fixed valves, and the fixed valves on the concentric rings guide gas to flow around the valve covers and penetrate through the side holes (19) and the bottom holes on the two sides of the fixed valves; the valve cover is provided with a valve clack at two sides respectively, and the liquid obtains axially upward and axially downward velocity components after passing through the valve clack of the fixed valve.
Further, the length of the fixed valve is 2-100 mm, the width is 1-100 mm, and the height is 1-50 mm.
Further, the fixed valves are transversely arranged on the concentric rings and distributed in a triangular shape or a rectangular shape.
Preferably, the valve flap adopts a semicircular structure or a triangular structure.
The invention has the beneficial effects that: the rotating bed rotor adopted by the invention is a fixed valve concentric ring rotor for promoting the axial distribution of liquid, and the trapezoidal fixed valve with the semicircular flaps on the concentric ring can guide gas to flow around the valve cover of the fixed valve and then pass through the side holes at the two sides of the fixed valve and the bottom hole of the fixed valve, so that the gas turbulence is increased, and the gas phase mass transfer coefficient of the rotating bed is increased; one part of liquid drops fall on the inner side wall surface of the concentric ring, then pass through the concentric ring through the bottom hole of the fixed valve, and the other part of liquid drops fall on the inner side wall of the valve cover of the fixed valve, and then are divided into two paths to pass through the semicircular valve of the fixed valve and further pass through the concentric ring; the liquid obtains the velocity components of the axial upward and the axial downward after passing through the semi-circle valve of the fixed valve, thereby promoting the axial distribution of the liquid, increasing the liquid phase mass transfer coefficient of the rotating bed, simultaneously increasing the gas phase and liquid phase mass transfer coefficients of the rotating bed, and improving the gas-liquid mass transfer efficiency of the rotating bed.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a view from the direction a of fig. 1 (the standing valves are arranged in a lateral triangle).
Fig. 3 is a schematic diagram of a structure in which the fixed valves are arranged in a transverse rectangular shape.
Fig. 4 is a three-view diagram of the structure of a fixed valve using semicircular valve flaps.
Fig. 5 is a schematic structural diagram of a fixed valve using a triangular flap.
Fig. 6 is a flow path diagram of gas and liquid through a fixed valve.
FIG. 7 shows the theoretical plate number NTDependent on the amount of reflux QLSchematic diagram of the variation of (1).
Description of reference numerals: 1. a cavity; 2. dynamic sealing; 3. a liquid inlet pipe; 4. a gas outlet pipe; 5. an upper disc; 6. concentric rings; 7. a fixed valve; 8. a gas inlet pipe; 9. a lower disc; 10. a liquid outlet hole; 11. a rotor; 12. a liquid outlet pipe; 13. a valve cover; 14. a valve flap; 15. a droplet; 16. the liquid falling on the wall surface of the concentric ring passes through the moving path of the fixed valve; 17. the liquid falling on the inner wall surface of the valve cover passes through the moving path of the fixed valve; 18. a bottom hole; 19. a side hole; 20. the gas passes through the moving path of the bottom hole and the side hole of the fixed valve; 21. a rotating shaft; 22. a central chamber.
Detailed Description
The invention will be described in detail below with reference to the following drawings:
example 1: as shown in the attached figure 1, the fixed valve concentric ring rotating bed for promoting the axial distribution of liquid mainly comprises a cavity 1, wherein a rotor 11 is arranged in the cavity 1, a dynamic seal 2 is arranged between the rotor 11 and the cavity 1, a gas inlet pipe 8 is arranged on the side surface of the cavity 1, and a liquid outlet pipe 12 is arranged on the bottom plate of the cavity 1; a rotating shaft 21 of the rotor 11 penetrates through a bottom plate of the cavity 1, a liquid inlet pipe 3 penetrates through the cavity 1 and a central cavity 22 of the rotor 11 from the upper part of the cavity 1, the liquid inlet pipe 3 with an opening at the upper part and a closed bottom is coaxially arranged with the rotating shaft 21, and a plurality of liquid outlet holes 10 are formed in the pipe wall of the liquid inlet pipe 3; the gas outlet pipe 4 is arranged at the upper panel of the chamber 1 and communicates with the central chamber 22 of the rotor 11; the rotor 11 consists of an upper disc 5 and a lower disc 9, a group of concentric rings 6 which are concentric and have uniformly increased diameters are fixed between the upper disc 5 and the lower disc 9, a plurality of fixed valves 7 are arranged on the concentric rings 6, valve covers 13 of the fixed valves 7 protrude towards the outer sides of the concentric rings 6 to form bottom holes 18 and side holes 19 of the fixed valves 7, and two valve flaps 14 are respectively arranged on two sides of each valve cover 13; the length of the fixed valve 7 is 2-100 mm, the width is 1-100 mm, and the height is 1-50 mm; the fixed valves 7 are arranged transversely on the concentric rings 6 and are distributed in a triangular or rectangular shape (as shown in fig. 2 and 3).
Preferably, the valve flap 14 is of a semi-circular or triangular configuration (as shown in figures 4 and 5).
As shown in FIG. 6, the fixed valve 7 on the concentric ring 6 can guide the gas to flow around the valve cover 13 and then pass through the side hole 19 and the bottom hole 18 on both sides of the fixed valve 7 (i.e. the moving path 20 of the gas in FIG. 6 passing through the fixed valve bottom hole and the side hole), thereby increasing the gas turbulence and improving the gas phase mass transfer coefficient of the rotating bed; the liquid drops 15 land on the inner side wall surface of the concentric ring 6 and then pass through the concentric ring 6 through the bottom hole 18 (i.e., the moving path 16 of the fixed valve for the liquid landing on the wall surface of the concentric ring in fig. 6), or the liquid drops 15 land on the inner side wall of the fixed valve cover 13 and then are divided into two paths to pass through the fixed valve half flap 14 and further pass through the concentric ring 6 (i.e., the moving path 17 of the fixed valve for the liquid landing on the inner wall surface of the valve cover in fig. 6); the liquid obtains velocity components of axial upward and axial downward after passing through the semi-circle valve 14 of the fixed valve, thereby promoting the axial distribution of the liquid, the gas and the liquid are in intensive contact when passing through the fixed valve 7, and the mass transfer and the heat transfer occur.
The working process of the embodiment: gas tangentially enters the cavity 1 from the gas inlet pipe 8 and further enters the rotor 11, and the gas moves in the circumferential direction under the drive of the rotation of the concentric ring 6; meanwhile, the gas flows radially in the rotor 11 under the action of pressure difference, the gas passes through the bottom hole 18 and the side hole 19 with the fixed valve 7, the gas turbulence is intensified, the gas phase mass transfer coefficient is improved, and finally the gas is discharged through the gas outlet pipe 4; liquid enters the rotor 11 from the liquid inlet pipe 3 through the liquid outlet holes 10 on the pipe wall of the inlet pipe and is thrown out under the action of centrifugal force, the liquid is in intensive contact with gas when passing through the fixed valve 7 on the concentric ring 6, mass transfer and heat transfer occur, and finally the liquid is discharged from the liquid outlet pipe 12.
Example 2: when the invention is used for rectification, gas from a reboiler enters an inner cavity of a cavity 1 from a gas inlet pipe 8, radially passes through a fixed valve 7 on a concentric ring 6 in a rotor 11, is in countercurrent contact with liquid, and finally enters a condenser through a gas outlet pipe 4 for condensation to obtain a rectification product; part of the condensate enters from the liquid inlet pipe 3 as reflux, enters the rotor 11 through the liquid outlet holes 10 on the liquid inlet pipe 3, is thrown out with higher speed under the action of centrifugal force, is crushed into fine liquid foam and liquid filaments, and is in countercurrent contact with gas to carry out mass transfer and heat transfer, the liquid enters the reboiler for heating through the liquid outlet pipe 12, and the rectification product is discharged from the reboiler.
The full-reflux atmospheric distillation experiment is carried out by taking ethanol-water as a material system and adopting a concentric ring rotor with 400mm of inner diameter, 1000mm of outer diameter and 100mm of height and provided with sieve holes and a concentric ring rotor with a semicircular valve clack fixed valve of the invention at the rotating speed of a super-gravity rotating bed of 1000 r/min. The experimental result is shown in figure 7, the theoretical plate number of the concentric ring rotor with the sieve holes is 4.2-5.5, and the theoretical plate number of the concentric ring rotor with the fixed valve with the semicircular valve clack is 10-21% higher than that of the concentric ring rotor with the sieve holes, which shows that the fixed valve concentric ring rotating bed can promote the axial distribution of liquid, has a mass transfer efficiency superior to that of the concentric ring rotating bed with the sieve holes, and has a wide prospect in industrial application.
It should be understood that equivalent substitutions and changes to the technical solution and the inventive concept of the present invention should be made by those skilled in the art to the protection scope of the appended claims.

Claims (4)

1. A fixed valve concentric ring rotating bed for promoting axial distribution of liquid mainly comprises a cavity (1), wherein a rotor (11) is arranged in the cavity (1), a dynamic seal (2) is arranged between the rotor (11) and the cavity (1), a gas inlet pipe (8) is arranged on the side surface of the cavity (1), and a liquid outlet pipe (12) is arranged on the bottom plate of the cavity (1); the method is characterized in that: a rotating shaft (21) of the rotor (11) penetrates through a bottom plate of the cavity (1), a liquid inlet pipe (3) penetrates through the cavity (1) and a central cavity (22) of the rotor (11) from the upper part of the cavity (1), the liquid inlet pipe (3) with an opening at the upper part and a closed bottom is coaxially arranged with the rotating shaft (21), and the wall of the liquid inlet pipe (3) is also provided with a plurality of liquid outlet holes (10); the gas outlet pipe (4) is arranged at the upper panel of the cavity (1) and communicated with the central chamber (22) of the rotor (11); the rotor (11) consists of an upper disc (5) and a lower disc (9), a group of concentric rings (6) which are concentric and have uniformly increased diameters are fixed between the upper disc (5) and the lower disc (9), a plurality of fixed valves (7) are arranged on the concentric rings (6), valve covers (13) of the fixed valves (7) protrude towards the outer sides of the concentric rings (6) to form bottom holes (18) and side holes (19) of the fixed valves (7), and the fixed valves (7) on the concentric rings (6) guide gas to flow around the valve covers (13) and penetrate through the side holes (19) and the bottom holes (18) on the two sides of the fixed valves; the valve cover (13) is provided on both sides with a flap (14) respectively, the liquid, after passing the flap (14) of the fixed valve, acquiring axially upward and axially downward velocity components.
2. A fixed valve concentric ring rotating bed for promoting axial distribution of a liquid according to claim 1, wherein: the length of the fixed valve (7) is 2-100 mm, the width is 1-100 mm, and the height is 1-50 mm.
3. A fixed valve concentric ring rotating bed for promoting axial distribution of a liquid according to claim 1, wherein: the valve clack (14) adopts a semicircular structure or a triangular structure.
4. A fixed valve concentric ring rotating bed for promoting axial distribution of a liquid according to claim 1, wherein: the fixed valves (7) are transversely arranged on the concentric rings (6) and are distributed in a triangular or rectangular shape.
CN201910908329.0A 2019-09-25 2019-09-25 Fixed valve concentric ring rotating bed for promoting axial distribution of liquid Withdrawn CN110721648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910908329.0A CN110721648A (en) 2019-09-25 2019-09-25 Fixed valve concentric ring rotating bed for promoting axial distribution of liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910908329.0A CN110721648A (en) 2019-09-25 2019-09-25 Fixed valve concentric ring rotating bed for promoting axial distribution of liquid

Publications (1)

Publication Number Publication Date
CN110721648A true CN110721648A (en) 2020-01-24

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ID=69218387

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910908329.0A Withdrawn CN110721648A (en) 2019-09-25 2019-09-25 Fixed valve concentric ring rotating bed for promoting axial distribution of liquid

Country Status (1)

Country Link
CN (1) CN110721648A (en)

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Application publication date: 20200124