A liquid flooding prevention device for an absorption tower

Abstract

This utility model relates to the field of absorption tower technology, specifically to an anti-flooding device for absorption towers. It solves the technical problem of poor anti-flooding performance in existing absorption towers during operation. The device includes a tower body with multiple vertically distributed anti-flooding guide vanes, each inclined. Each anti-flooding guide vane has several through holes, and below each through hole is a downwardly protruding guide cylinder. The guide cylinder has a hollow internal structure, and each guide cylinder corresponds to a through hole, with the interior of the guide cylinder communicating with the corresponding through hole. Below each anti-flooding guide vane and along the inner circumferential wall of the tower body, a baffle protruding towards the inner side of the tower body is provided. Each baffle has an upward-opening overflow groove. Gas flowing upwards contacts the bottom wall of the anti-flooding guide vane, and liquefied droplets on the bottom wall of the anti-flooding guide vane flow along the inclined bottom wall of the anti-flooding guide vane and flow into the overflow groove.

Description

Technical Field

[0001] This utility model relates to the field of absorption tower technology, specifically to an absorption tower flood prevention device. Background Technology

[0002] In industries such as industrial waste gas treatment and chemical raw material purification, absorption towers are core equipment for achieving gas-liquid two-phase mass exchange and separation, and their operational stability directly affects production efficiency and treatment effect. Currently, most mainstream absorption towers on the market achieve gas-liquid flow and contact through simple built-in baffles or packing layers. However, under high-load operation, problems such as imbalance in the reverse gas-liquid flow rate and uneven liquid distribution within the tower can lead to liquid accumulation within the tower due to the inability to discharge in time, thus causing flooding.

[0003] When flooding occurs, the gas-liquid interface inside the absorber is disrupted, significantly reducing mass transfer efficiency and leading to substandard exhaust gas treatment or decreased product purity. It can also cause equipment corrosion, blockage, or even shutdown due to liquid backflow into the inlet pipe. Existing solutions for flooding rely on the inertial impaction of droplets on the wire mesh fibers for trapping. However, these solutions have drawbacks: the mesh is prone to clogging due to excessive liquid, causing a sharp increase in pressure drop; they are effective for large droplets but have low separation efficiency for fine droplets (<5μm); and they require frequent cleaning and replacement over long-term operation. Alternatively, baffles can be used to prevent flooding, but these have disadvantages: the baffles create strong eddies, making droplets easily re-entrained; the airflow channel has many bends, resulting in a large pressure drop and increased energy consumption; and liquid accumulation on the baffle surface can exacerbate the flooding risk. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an anti-flooding device for absorption towers, solving the technical problem of poor anti-flooding performance of existing absorption towers during operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-flooding device for an absorption tower, comprising a tower body, wherein a plurality of anti-flooding guide plates are arranged vertically within the tower body, each of the anti-flooding guide plates being inclined; each of the anti-flooding guide plates has several through holes, and a downwardly protruding guide cylinder is correspondingly arranged below each through hole, the interior of the guide cylinder having a hollow structure, the guide cylinder corresponding one-to-one with the through hole, and the interior of the guide cylinder communicating with the corresponding through hole;

[0006] Below each of the anti-flood guide plates and along the inner circumferential wall of the tower body, there is a baffle protruding towards the inner side of the tower body. Each baffle plate has an overflow groove with its opening facing upward. Part of the gas flowing upward will contact the bottom wall of the anti-flood guide plate. Part of the liquid droplets liquefied on the bottom wall of the anti-flood guide plate can flow along the inclined bottom wall of the anti-flood guide plate and flow into the overflow groove.

[0007] Furthermore, a return pipe is connected to the bottom of the tower body, and the other end of the return pipe is connected to each of the overflow tanks through a branch pipe to guide the liquid in the overflow tanks back to the bottom of the tower body.

[0008] Furthermore, a one-way valve is installed on the return pipe.

[0009] Furthermore, a fog-catching net is installed inside the tower body and above the plurality of anti-fogging guide plates.

[0010] Furthermore, the anti-flood guide plate is inclined at an angle of 10°-30° to the horizontal plane, the thickness of the anti-flood guide plate is 2cm-4cm, and the diameter of the through hole is 2mm-5mm.

[0011] Furthermore, the depth of the overflow trough is set to 20mm-50mm.

[0012] Furthermore, the top of the tower body is equipped with a liquid inlet pipe and a vent pipe, and the bottom of the tower body is equipped with a liquid drain pipe and a gas inlet pipe.

[0013] Furthermore, the tower body is filled with packing material located below the plurality of anti-overflow guide plates.

[0014] Compared with the prior art, this utility model provides an absorption tower flood prevention device, which has the following beneficial effects:

[0015] This absorber tower flood prevention device features inclined anti-flooding guide vanes distributed vertically within the tower body. Through the inclusion of a hollow sleeve and overflow trough, the through-holes and sleeve guide the downward-flowing liquid smoothly downwards through the guide vanes and upward-flowing gas. This allows droplets generated after contact with the inclined bottom wall of the gas to flow along the bottom wall of the inclined guide vanes and ultimately into the overflow trough. This achieves efficient gas-liquid separation and orderly liquid discharge, effectively preventing liquid accumulation within the tower. The flood prevention effect is significantly superior to traditional structures (wire mesh, baffles), greatly reducing the risk of flooding during tower operation, while ensuring stable gas-liquid mass transfer efficiency and reducing the probability of equipment failure and downtime. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 2 This utility model Figure 1 The diagram shows a partially enlarged structural schematic at point A.

[0018] In the diagram: 1. Tower body; 2. Anti-flood guide plate; 3. Through hole; 4. Guide cylinder; 5. Liquid inlet pipe; 6. Exhaust pipe; 7. Air inlet pipe; 8. Liquid outlet pipe; 9. Return pipe; 10. Branch pipe; 11. Mist eliminator; 12. Packing; 13. Baffle; 14. Overflow groove; 15. Check valve. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-2 This utility model discloses an absorption tower flood prevention device, comprising a tower body 1, which contains a gas-liquid exchange chamber. An inlet pipe 5 and an exhaust pipe 6 are installed at the top of the tower body 1, while a drain pipe 8 and an air inlet pipe 7 are installed at the bottom. The inlet pipe 5 is used to supply the liquid to be absorbed into the tower body 1; the exhaust pipe 6 is used to discharge the gas after mass transfer; the drain pipe 8 is used to discharge the liquid accumulated at the bottom of the tower body 1; and the air inlet pipe 7 is used to introduce the required gas (such as water vapor) into the tower body 1. To facilitate the control of fluid transport in each pipeline, valves are installed on the inlet pipe 5, exhaust pipe 6, drain pipe 8, and air inlet pipe 7. The fluid flow rate can be controlled by opening and closing or adjusting the opening degree of the valves.

[0021] Meanwhile, packing material 12 is filled inside the tower body 1. This packing material 12 can increase the contact area between the gas and the liquid, improve the mass transfer efficiency of the gas and liquid phases, and enable the gas to undergo a more complete absorption reaction with the liquid, thereby further ensuring the treatment effect of the absorption tower.

[0022] like Figure 1-2 As shown, multiple anti-flooding guide vanes 2 are spaced apart along the height direction inside the tower body 1. All anti-flooding guide vanes 2 are arranged in an inclined state to provide an inclined angle for subsequent liquid flow.

[0023] Each anti-flooding guide plate 2 has several through holes 3, and directly below each through hole 3, a downwardly protruding guide tube 4 is fixed. The guide tube 4 is hollow and maintains a one-to-one positional relationship with the through hole 3. The internal cavity of the guide tube 4 communicates with the corresponding through hole 3 above, forming a vertically connected channel. The guide tube 4 prevents liquid droplets on the bottom wall of the anti-flooding guide plate 2 from entering the through hole 3, thus preventing flooding.

[0024] Directly below each anti-flood guide plate 2, along the circumferential direction of the inner wall of the tower body 1, a retaining edge 13 protruding towards the center of the tower body 1 is also fixed. Each retaining edge 13 has an upward-facing overflow groove 14 at its top, which is used to receive and collect the liquid flowing down the bottom wall of the anti-flood guide plate 2.

[0025] During the operation of the absorption tower, a portion of the gas flowing upward from the bottom of the tower body 1 (another portion of the gas flows directly through the guide tube 4 and the through hole 3 and moves upward) comes into contact with the bottom wall of the anti-flooding guide plate 2. This portion of the gas liquefies upon contact with the bottom wall of the anti-flooding guide plate 2, producing a certain amount of droplets. These droplets, under the influence of gravity, naturally flow downward along the inclined bottom wall of the anti-flooding guide plate 2 and eventually flow into the overflow groove 14 of the lower baffle 13, thus achieving liquid collection.

[0026] To further explain, the anti-flood guide plate 2 is tilted at an angle of 10°-30° to the horizontal plane. This angle ensures that the liquefied droplets flow along the bottom surface of the anti-flood guide plate 2 under the action of gravity. The thickness of the anti-flood guide plate 2 is 2cm-4cm, and the anti-flood guide plate 2 can be made of materials such as stainless steel to achieve the effect of rust and corrosion prevention.

[0027] The through holes 3 on the anti-overflow guide plate 2 have a diameter of 2mm-5mm. This size design ensures smooth passage of gas and liquid while effectively controlling the liquid flow rate. The overflow groove 14 has a depth of 20mm-50mm.

[0028] To achieve the recycling and orderly discharge of liquid in the overflow tank 14, a return pipe 9 is connected to the bottom of the tower body 1. The other end of the return pipe 9 extends and branches into several branch pipes 10, and each branch pipe 10 is connected to the corresponding overflow tank 14 in the tower. Through the guiding effect of the return pipe 9 and the branch pipes 10, the liquid collected in the overflow tank 14 can flow into the return pipe 9 through the branch pipes 10, and finally be guided back to the bottom of the tower body 1 by the return pipe 9. This achieves both the recycling of liquid and the prevention of liquid accumulation in the overflow tank 14.

[0029] Meanwhile, a one-way valve 15 is also installed on the return pipe 9. The one-way valve 15 only allows liquid to flow from the branch pipe 10 to the bottom of the tower body 1, which can effectively prevent liquid or gas at the bottom of the tower body 1 from flowing back into the overflow tank 14 along the return pipe 9, ensuring the one-way action of the liquid recovery path.

[0030] like Figure 1As shown, a mist-catching net 11 is installed inside the tower body 1 and above multiple anti-flooding guide plates 2. The function of this mist-catching net 11 is to intercept fine droplets that still flow upwards with the gas after being treated by the anti-flooding guide plates 2. When the gas carrying fine droplets flows upwards through the mist-catching net 11, the droplets adhere to the warp and weft lines of the net. As the attached droplets continuously converge, they eventually form larger droplets and, under the action of gravity, drip downwards onto the anti-flooding guide plates 2, re-participating in the gas-liquid exchange within the tower. This avoids the waste caused by fine droplets being discharged with the gas from the exhaust pipe 6. The mist-catching net 11 can be made of woven metal wire, which not only possesses good structural strength but also good corrosion resistance and high-temperature resistance.

[0031] like Figure 1 As shown, it should be further explained that the packing 12 inside the tower body 1 mentioned above is installed in the area below the multiple anti-flooding guide plates 2. This installation position allows the gas introduced from the bottom inlet pipe 7 of the tower body 1 to pass through the packing 12 layer during its upward flow, and to fully contact the liquid flowing downward from the upper anti-flooding guide plates 2 in the packing 12 layer, thus completing the initial gas-liquid mass transfer exchange.

[0032] In summary, this anti-flooding device for an absorption tower operates as follows: Gas is introduced through the inlet pipe 7 at the bottom of the tower body 1, and liquid is introduced through the liquid inlet pipe 5. Gas-liquid mass transfer is completed in the packing layer 12, and the gas continues to flow upwards. When the upward-flowing gas contacts the bottom wall of the anti-flooding guide plate 2, its liquefiable components condense into droplets. These droplets are guided by the tilt angle of the anti-flooding guide plate 2, flowing naturally along the bottom wall and eventually into the overflow trough 14 of the lower baffle 13. The guide cylinder 4 prevents droplets on the bottom wall of the anti-flooding guide plate 2 from entering the through-hole 3, thus preventing flooding. The liquid collected in the overflow trough 14 is guided back to the bottom of the tower body 1 through the branch pipe 10 and the return pipe 9 for recycling, while the unliquefied gas continues upwards, passing through the mist trap 11 to intercept fine droplets, and is then discharged from the exhaust pipe 6.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flood prevention device for an absorption tower, comprising a tower body (1), characterized in that: The tower body (1) is provided with a plurality of anti-flooding guide plates (2) distributed vertically, each of the anti-flooding guide plates (2) being inclined; each of the anti-flooding guide plates (2) is provided with a plurality of through holes (3), and a downward protruding guide cylinder (4) is provided below each of the through holes (3), the inside of the guide cylinder (4) is a hollow structure, the guide cylinder (4) corresponds one-to-one with the through holes (3), and the inside of the guide cylinder (4) is connected to the corresponding through hole (3); Below each of the anti-flood guide plates (2) and along the inner peripheral wall of the tower body (1), there is a baffle (13) protruding towards the inside of the tower body (1). Each baffle (13) has an overflow groove (14) with its opening facing upward. The gas flowing upward will contact the bottom wall of the anti-flood guide plate (2). The liquid droplets liquefied on the bottom wall of the anti-flood guide plate (2) can flow along the inclined bottom wall of the anti-flood guide plate (2) and flow into the overflow groove (14).

2. The flood prevention device for an absorption tower according to claim 1, characterized in that: The bottom of the tower body (1) is connected to a return pipe (9), and the other end of the return pipe (9) is connected to each of the overflow tanks (14) through a branch pipe (10) to guide the liquid in the overflow tanks (14) back to the bottom of the tower body (1).

3. The anti-flooding device for an absorption tower according to claim 2, characterized in that: A one-way valve (15) is installed on the return pipe (9).

4. The anti-flooding device for an absorption tower according to claim 3, characterized in that: A fog-catching net (11) is installed inside the tower body (1) and above the plurality of anti-flood guide plates (2).

5. A flood prevention device for an absorption tower according to any one of claims 1-4, characterized in that: The anti-flood guide plate (2) is inclined at an angle of 10°-30° to the horizontal plane, the thickness of the anti-flood guide plate (2) is 2cm-4cm, and the diameter of the through hole (3) is 2mm-5mm.

6. The anti-flooding device for an absorption tower according to claim 5, characterized in that: The depth of the overflow trough (14) is set to 20mm-50mm.

7. The anti-flooding device for an absorption tower according to claim 1, characterized in that: The top of the tower body (1) is equipped with a liquid inlet pipe (5) and an exhaust pipe (6), and the bottom of the tower body (1) is equipped with a liquid drain pipe (8) and an air inlet pipe (7).

8. The flood prevention device for an absorption tower according to claim 7, characterized in that: The tower body (1) is filled with packing material (12) and located below the plurality of anti-flood guide plates (2).

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