High-efficiency rotary baffling packed bed device

Abstract

A high-efficiency rotary baffling packed bed device belongs to the technical field of chemical equipment, can solve the problems of non-uniform packing distribution, low mass transfer efficiency, non-ideal cooling effect and the like of an existing rotary packed bed, and comprises a shell, a variable frequency motor is arranged in the center of the top end of the shell, and a liquid inlet and a gas outlet are formed in the two sides of the top end of the shell respectively. A liquid outlet and a gas inlet are formed in the two sides of the bottom of the shell respectively, a variable frequency motor is arranged on the outer side of the top end of the shell, the output end of the variable frequency motor is connected with a rotating shaft, the rotating shaft stretches into the shell and extends to the tail end of the shell, and detachable filler is arranged in the center of the shell. A plurality of outer-ring deflection baffles and inner-ring deflection baffles are alternately arranged at the upper end and the lower end of the packing respectively, and the packing and the inner-ring deflection baffles are arranged on the outer side of the rotating shaft in a sleeving mode respectively. By optimizing the filler distribution and arranging the deflection baffles, the contact efficiency and mass transfer effect between gas and liquid are improved, and the efficiency of the chemical process is remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical equipment, and in particular relates to a high-efficiency rotating baffled packed bed device. Background Art

[0002] A rotating packed bed is a highly efficient chemical equipment that promotes contact and mass transfer between gas and liquid by rotating the packing, thereby improving the efficiency of the chemical process. However, the conventional rotating packed bed has problems such as uneven packing distribution, low mass transfer efficiency, and unsatisfactory cooling effect, which limits its application scope. Therefore, the present invention proposes a novel high-efficiency rotating baffled packed bed device to solve the above problems. Summary of the invention

[0003] Aiming at the problems of uneven packing distribution, low mass transfer efficiency, unsatisfactory cooling effect, etc. in the existing rotating packed bed, the present invention provides a high-efficiency rotating baffled packed bed device suitable for chemical processes such as gas-liquid mass transfer, reaction, absorption, desorption, etc.

[0004] The present invention adopts the following technical solution: A high-efficiency rotating baffled packing bed device comprises a shell, a frequency conversion motor is provided at the top center of the shell, a liquid inlet and a gas outlet are provided on both sides of the top of the shell, a liquid outlet and a gas inlet are provided on both sides of the bottom of the shell, a frequency conversion motor is provided on the outside of the top of the shell, a rotating shaft is connected to the output end of the variable frequency motor, the rotating shaft extends into the shell and extends to the end of the shell, a detachable packing is provided at the center of the shell, a plurality of outer ring baffle plates and inner ring baffle plates are alternately provided at the upper and lower ends of the packing, and the packing and the inner ring baffle plates are respectively sleeved on the outside of the rotating shaft.

[0005] Furthermore, a spirally distributed cooling water pipe is provided at the bottom of the shell, and the cooling water pipe is sleeved on the outside of the rotating shaft. A cooling water inlet and a cooling water outlet connected to the cooling water pipe are respectively provided on both sides of the shell.

[0006] Furthermore, the height of the cooling water outlet is lower than the height of the cooling water inlet, and a centrifugal pump and a cooling water tank are provided at one end of the cooling water inlet.

[0007] Furthermore, the variable frequency motor is fixed to the top of the shell through a mounting frame, and a sealed bearing is provided at the connecting end of the rotating shaft and the shell.

[0008] Furthermore, the outer ring baffle includes two symmetrically arranged baffles, a gap is provided between the two baffles and the rotating shaft, and the outer ring baffle is connected to the inner wall of the shell through an I-shaped annular slide rail.

[0009] Furthermore, the center of the inner circle baffle is welded to the rotating shaft, and the outer diameter of the inner circle baffle is larger than the inner diameter of the outer circle baffle.

[0010] Furthermore, the filler comprises a plurality of filler modules connected in sequence through protrusions and grooves, and the filler modules are provided with a plurality of sieve holes on all side surfaces except the inner side surface.

[0011] Furthermore, the bottom of the filler is clamped by a tray arranged on the rotating shaft.

[0012] Furthermore, a metal wire mesh is sleeved on the outer side of the filler, and two sides of the metal wire mesh are connected to the inner wall of the shell through fixing rods respectively.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention improves the contact efficiency and mass transfer effect between gas and liquid by optimizing the distribution of fillers and setting baffles, thereby significantly improving the efficiency of the chemical process.

[0014] 2. The design of the spiral cooling device effectively reduces the outlet temperature of the packed bed and improves the continuity of the chemical process.

[0015] 3. The design of removable packing facilitates the removal and replacement of packing, reducing maintenance costs.

[0016] 4. The invention has a compact structure, is easy to operate and maintain, and is suitable for various chemical processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 A local enlarged view of point a; Figure 3 for Figure 1 A local enlarged view of point b; Figure 4 for Figure 1 A local enlarged view of point c; Among them: 1-shell; 2-mounting frame; 3-frequency conversion motor; 4-liquid inlet; 5-gas outlet; 6-outer ring baffle; 7-inner ring baffle; 8-rotating shaft; 9-filler; 10-metal wire mesh; 11-cooling water pipe; 12-cooling water inlet; 13-cooling water outlet; 14-liquid outlet; 15-gas inlet. DETAILED DESCRIPTION

[0018] The present invention will be further described with reference to the accompanying drawings.

[0019] As shown in the figure, a high-efficiency rotating baffled packed bed device includes a shell 1, a frequency conversion motor 3 is provided at the top center of the shell 1, a liquid inlet 4 and a gas outlet 5 are provided on both sides of the top of the shell 1, a liquid outlet 14 and a gas inlet 15 are provided on both sides of the bottom of the shell 1, a frequency conversion motor 3 is provided on the outside of the top of the shell 1, and a rotating shaft 8 is connected to the output end of the variable frequency motor 3, and the rotating shaft 8 extends into the shell 1 and extends to the end of the shell 1, a detachable packing 9 is provided in the center of the shell 1, and a plurality of outer ring baffle plates 6 and inner ring baffle plates 7 are alternately provided at the upper and lower ends of the packing 9, and the packing 9 and the inner ring baffle plates 7 are respectively sleeved on the outside of the rotating shaft 8.

[0020] The shell 1 is a supporting structure of the entire device and is designed to be closed to ensure that the gas and liquid are in full contact inside; the mounting frame 2 is fixedly connected to the upper surface of the shell 1, and the frequency conversion motor 3 is fixedly connected to the mounting frame 2. The rotation speed of the rotating shaft 8 is controlled by adjusting the rotation speed, thereby controlling the working speed of the rotating packed bed; the liquid inlet 4 is arranged above the shell 1 for inputting desulfurization liquid (such as alkaline solution); the gas outlet 5 is arranged on the other side above the shell 1 for outputting desulfurized gas; the liquid outlet 14 is arranged below the shell 1 for discharging incompletely absorbed desulfurization liquid; the gas inlet 15 is arranged on the other side below the shell 1 for inputting waste gas containing sulfur dioxide; the cooling water inlet 12 and the cooling water outlet 13 are respectively arranged on the left and right sides of the shell 1 The two sides are used for circulating cooling water to reduce the temperature of the packing bed; the rotating shaft 8 is arranged in the middle of the shell 1, the outer ring baffle 6 is connected to the inner wall of the shell by an I-shaped annular slide rail, and the inner ring baffle 7 is connected to the rotating shaft 8 by welding, and together form a baffle channel to enhance the disturbance and contact between gas and liquid; adjacent detachable packings 9 are installed together by I-shaped radial slide rails, and sieve holes are opened on the outside, upper side, lower side and left and right sides to facilitate the penetration of desulfurization liquid and the absorption of sulfur dioxide; a metal wire mesh 10 is arranged on the periphery of the packing 9 device to further increase the gas-liquid contact area and improve the mass transfer efficiency; the cooling water pipe 11 is spirally distributed at the bottom of the interior of the shell 1 and is made of stainless steel. The temperature of the packing bed is reduced by circulating cooling water to improve the desulfurization efficiency.

[0021] The height of the filler 9 is 200 mm, and the depth of the protrusions and grooves of the filler 9 are both 5 mm, and the width is 3 mm.

[0022] The cooling water pipe 11 is made of stainless steel, has a pipe diameter of 20 mm, and is installed 200 mm below the filler 9 .

[0023] The purpose of the device is further illustrated below by taking the example of the absorption of sulfur dioxide.

[0024] The absorption of sulfur dioxide is one of the common chemical reactions in chemical production, and is usually used in the fields of waste gas treatment and environmental purification. The absorption of sulfur dioxide usually uses an alkaline solution (such as sodium hydroxide NaOH solution) as an absorbent to convert SO2 into corresponding salts (such as sodium sulfite Na2SO3) through gas-liquid contact and mass transfer. The chemical reaction equation is as follows: SO2 + 2NaOH →Na2SO3 + H2O.

[0025] First, the prepared sodium hydroxide (NaOH) solution is used as the desulfurization liquid and poured into the high-efficiency rotating baffled packed bed device through the liquid inlet 4. The desulfurization liquid should cover the entire packing layer to ensure that there is enough contact area between the gas and the liquid.

[0026] Then, the variable frequency motor 3 is started, and the rotation speed of the rotating shaft 8 is controlled by adjusting the rotation speed, thereby driving the inner ring baffle 7 to rotate.

[0027] At this time, the device is in the preheating and preparation stage, preparing for the next sulfur dioxide absorption process. The exhaust gas source containing sulfur dioxide (SO2) is turned on, and the exhaust gas is introduced into the device through the gas inlet 15. The exhaust gas is affected by the rotating baffle in the device, forming a complex flow path, which increases the contact opportunity with the desulfurization liquid.

[0028] The exhaust gas first passes through the outer ring baffles 6, which are connected to the inner wall of the shell through I-shaped annular slide rails to form a series of baffle channels. When the exhaust gas passes through these channels, it is forced to change the flow direction, generating eddy currents and turbulence, which enhances the mixing and mass transfer between gas and liquid.

[0029] The exhaust gas passing through the outer baffle plate 6 then enters the denser baffle channels formed by the inner baffle plate 7. These channels further aggravate the disturbance of the airflow, so that the sulfur dioxide molecules in the exhaust gas can contact the desulfurization liquid more fully.

[0030] Under the action of the inner circle baffle 7, the exhaust gas finally enters the packing 9. The packing modules are installed together through I-shaped radial slide rails, and sieve holes are opened on the outside, upper side, lower side, left and right sides to facilitate the penetration of the desulfurization liquid. When the exhaust gas passes through the packing layer, it is fully in contact with the desulfurization liquid. The sulfur dioxide molecules are captured by the sodium hydroxide molecules in the desulfurization liquid, and a chemical reaction occurs. The reaction converts sulfur dioxide into sodium sulfite (Na2SO3) and generates water.

[0031] In order to maintain the stability of the internal temperature of the device, circulating cooling water enters the cooling water pipe 11 through the cooling water inlet 12. The cooling water pipe 11 is spirally distributed at the bottom of the device, and heat is exchanged with the packing bed and exhaust gas through stainless steel pipes to reduce the temperature of the device and prevent the desulfurization efficiency from being affected by high temperature.

[0032] After being fully absorbed and cooled, the exhaust gas has a significantly reduced sulfur dioxide concentration and is discharged from the device through the gas outlet 5. At the same time, the desulfurization liquid that is not completely absorbed is discharged through the liquid outlet 14 for subsequent treatment or recovery.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-efficiency rotating baffled packed bed device, characterized in that: The invention comprises a shell (1), wherein a variable frequency motor (3) is provided at the center of the top of the shell (1), a liquid inlet (4) and a gas outlet (5) are provided at both sides of the top of the shell (1), a liquid outlet (14) and a gas inlet (15) are provided at both sides of the bottom of the shell (1), a variable frequency motor (3) is provided at the outer side of the top of the shell (1), an output end of the variable frequency motor (3) is connected to a rotating shaft (8), the rotating shaft (8) extends into the shell (1) and extends to the end of the shell (1), a detachable filler (9) is provided at the center of the shell (1), a plurality of outer ring baffle plates (6) and inner ring baffle plates (7) are alternately provided at the upper and lower ends of the filler (9), and the filler (9) and the inner ring baffle plates (7) are respectively sleeved on the outer side of the rotating shaft (8).

2. A high-efficiency rotating baffled packed bed device according to claim 1, characterized in that: A spirally distributed cooling water pipe (11) is provided at the bottom of the shell (1), and the cooling water pipe (11) is sleeved on the outside of the rotating shaft (8). A cooling water inlet (12) and a cooling water outlet (13) which are in communication with the cooling water pipe (11) are respectively provided on both sides of the shell (1).

3. A high-efficiency rotating baffled packed bed device according to claim 2, characterized in that: The height of the cooling water outlet is lower than that of the cooling water inlet, and a centrifugal pump and a cooling water tank are arranged at one end of the cooling water inlet.

4. A high-efficiency rotating baffled packed bed device according to claim 1, characterized in that: The variable frequency motor (3) is fixed to the top end of the housing (1) via a mounting frame (2), and a sealed bearing is provided at the connection end between the rotating shaft (8) and the housing (1).

5. A high-efficiency rotating baffled packed bed device according to claim 1, characterized in that: The outer ring baffle plate (6) comprises two symmetrically arranged baffle plates, a space is provided between the two baffle plates and the rotating shaft (8), and the outer ring baffle plate (6) is connected to the inner wall of the housing (1) via an I-shaped annular slide rail.

6. A high-efficiency rotating baffled packed bed device according to claim 1, characterized in that: The center of the inner circle baffle plate (7) is welded to the rotating shaft (8), and the outer diameter of the inner circle baffle plate (7) is greater than the inner diameter of the outer circle baffle plate (6).

7. A high-efficiency rotating baffled packed bed device according to claim 1, characterized in that: The filler (9) comprises a plurality of filler modules connected in sequence via protrusions and grooves, and the filler modules are provided with a plurality of sieve holes on all side surfaces except the inner side surface.

8. A high-efficiency rotating baffled packed bed device according to claim 1, characterized in that: The bottom of the filler (9) is clamped by a tray arranged on the rotating shaft (8).

9. A high-efficiency rotating baffled packed bed device according to claim 1, characterized in that: A metal wire mesh (10) is sleeved on the outer side of the filler (9), and two sides of the metal wire mesh (10) are connected to the inner wall of the housing (1) via fixing rods.

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