An even distribution device for a circulating liquid of an absorption tower

Abstract

The utility model relates to waste gas treatment equipment technical field discloses a kind of absorption tower circulating liquid uniform distribution devices, including tower body, the one side of tower body bottom is provided with air inlet, liquid outlet pipe is installed in the other side of tower body bottom, gas outlet is opened in the top of tower body, liquid inlet pipe is installed in the side close to the top of tower body, liquid inlet pipe outlet end is communicated with liquid distributor in the inside of tower body, packing layer is arranged in the middle of tower body, collecting tank is arranged in the bottom of tower body, and liquid distributor includes fixed frame, fixed frame is installed on the inside wall of tower body upper side, rotating liquid distributor is installed on fixed frame, rotating liquid distributor side is communicated with liquid inlet pipe, rotating liquid distributor below is provided with liquid distribution tray.The absorption tower circulating liquid uniform distribution device, by setting the structure of rotating liquid distributor and elastic scraper of leakage hole two sides driven by motor, liquid can be evenly thrown to each area of liquid distribution tray by leakage hole, elastic scraper moves synchronously with rotating liquid distributor, continuously adheres to the surface of through-hole and is cleaned, avoid accumulation and block.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment equipment, and in particular to a device for uniform distribution of circulating liquid in an absorption tower. Background Technology

[0002] An absorption tower is an industrial device used for gas purification or component separation, widely applied in chemical, environmental protection, and metallurgical fields. Its core principle is to utilize the differences in solubility of different components in a gas within a specific absorbent (liquid or solid), allowing the target gas component to be selectively absorbed by the absorbent, thereby achieving gas purification or recovery of useful components.

[0003] Existing patent CN221536165U discloses an absorption tower device. This device utilizes a tubular liquid distributor with a closed annular channel. Multiple inlets and straight circular pipes are spaced apart within this channel. The straight circular pipes are located within the space enclosed by the closed annular channel, with both ends connected to the channel. Multiple straight circular pipes are arranged parallel to each other and evenly spaced. Two rows of outlet holes are symmetrically arranged at the bottom of each straight circular pipe. Each outlet hole row includes several outlet holes evenly spaced along the length of the straight circular pipe, with the outlet holes in the two rows staggered. This application employs this tubular liquid distributor, which enables more uniform liquid distribution, ensuring the absorbent flows evenly to the surface of the packing material before entering it, thereby guaranteeing the separation efficiency of the packing layer for waste gas.

[0004] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: Traditional liquid distribution devices, due to their fixed liquid distribution structure, are prone to local liquid accumulation or distribution imbalance due to uneven flow velocity, resulting in uneven liquid distribution, insufficient gas-liquid contact, and reduced absorption efficiency. In addition, for circulating liquids containing particles (such as limestone slurry in desulfurization towers), traditional spray heads are prone to liquid distribution deviation due to nozzle blockage. Clogged nozzles can reduce the flow area, decrease the liquid distribution volume, affect the stability of device operation, and increase maintenance frequency and cost. Utility Model Content

[0005] The technical problem to be solved by this invention is that the existing technology has the disadvantages of uneven liquid distribution and easy clogging of liquid distribution holes, which affects the absorption efficiency of target gas components and the stability of operation. To this end, we propose a device for uniform distribution of circulating liquid in an absorption tower.

[0006] To achieve the above objectives, this application adopts the following technical solution: a circulating liquid uniform distribution device for an absorption tower, comprising a tower body, an air inlet on one side of the bottom of the tower body, a liquid outlet on the other side of the bottom of the tower body, an air outlet at the top of the tower body, a liquid inlet on the side of the tower body near the top, a liquid distributor connected to the liquid outlet end of the liquid inlet inside the tower body, a packing layer in the middle of the tower body, the packing layer being located below the liquid distributor, a liquid collection tank at the bottom of the tower body, and a fixed frame installed above the inner wall of the tower body. A rotating liquid distributor is installed on the fixed frame, one side of the rotating liquid distributor is connected to the liquid inlet, and a liquid distribution plate is installed below the rotating liquid distributor, the liquid distribution plate being installed on the inner wall of the tower body.

[0007] Preferably, the rotary liquid distributor includes a motor, which is mounted on a fixed frame. The motor drive end is connected to a liquid distribution box, and both ends of the liquid distribution box are attached to the inner wall of the tower. A connecting pipe is installed on the top of the liquid distribution box, and the motor drive end passes through the center of the connecting pipe. A leakage hole is opened at the bottom of the liquid distribution box, and elastic scrapers are installed on both sides of the leakage hole. The elastic scrapers are installed at the bottom of the liquid distribution box.

[0008] Preferably, the elastic scraper is in the shape of an inverted cone.

[0009] Preferably, the elastic scraper is a wear-resistant silicone brush, and the elastic scraper is installed in close contact with the surface of the liquid tray.

[0010] Preferably, the liquid distribution tray includes a tray body, which is installed on the inner wall of the tower body. The tray body is provided with through holes, and annular guide strips are provided between the through holes.

[0011] Preferably, the annular guide strip has a raised structure with a cross-section that is high in the middle and low on both sides. Every two adjacent annular guide strips form an annular guide groove, and the through hole is located in the concave part of the annular guide groove.

[0012] Preferably, the through hole is configured as an inverted cone shape.

[0013] The technical effects and advantages of this utility model are as follows: This invention achieves both improved uniformity of liquid distribution and proactive anti-clogging by incorporating a motor-driven rotating liquid distributor and elastic scrapers on both sides of the drain hole. The motor drive ensures a stable rotation speed for the distributor, unaffected by fluctuations in the circulating liquid flow rate, allowing the liquid to be evenly distributed to all areas of the distribution plate through the drain hole. The elastic scrapers move synchronously with the rotating distributor, continuously cleaning the surface of the drain hole to promptly remove adhering particulate impurities. This avoids the accumulation and blockage around the drain hole caused by inadequate cleaning, as seen in traditional devices. It reduces liquid distribution deviation and equipment downtime due to blockage, significantly improving the stability and reliability of the device operation.

[0014] In this invention, by setting an annular guide groove and an inverted conical through-hole on the liquid distribution plate, the liquid distribution path is optimized, and the risk of local liquid accumulation and blockage is reduced. The annular guide groove can form a buffer zone for the liquid falling from the rotating liquid distributor, so that the liquid is evenly distributed to each through-hole along the guide groove. The inverted conical through-hole design increases the inlet area, which not only facilitates the rapid inflow of liquid, but also reduces liquid residue by utilizing the inclined angle of the conical inner wall. At the same time, it makes it less likely for particles in the circulating liquid to get stuck in the hole, structurally reducing the probability of blockage and ensuring the stability of the effective flow area of ​​the through-hole during long-term operation, providing a basic guarantee for uniform gas-liquid contact in the absorption tower. Attached Figure Description

[0015] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 2 This is a three-dimensional structural diagram of the liquid dispenser of this utility model; Figure 3 This is a three-dimensional structural diagram of the rotary liquid distributor of this utility model. Figure 4 This is a schematic diagram of the cross-sectional planar structure of the rotary liquid distributor of this utility model; Figure 5 This is a three-dimensional structural diagram of the liquid distribution plate of this utility model.

[0016] Legend: 1. Tower body; 2. Air inlet; 3. Air outlet; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 6. Liquid distributor; 61. Fixing frame; 62. Rotary liquid distributor; 621. Motor; 622. Connecting pipe; 623. Liquid distribution box; 624. Leakage hole; 625. Elastic scraper; 63. Liquid distribution tray; 631. Tray body; 632. Through hole; 633. Annular guide strip; 7. Packing layer; 8. Liquid collection tank. Detailed Implementation

[0017] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0018] Reference Figure 1As shown, this utility model provides a technical solution: a device for uniformly distributing circulating liquid in an absorption tower, comprising: a tower body 1, an air inlet 2 connected to a pipeline of gas to be treated containing pollutants on one side of the bottom of the tower body 1, a liquid outlet pipe 5 connected to the other side of the bottom of the tower body 1, an air outlet 3 connected to an exhaust pipeline of purified gas on the top of the tower body 1, an inlet pipe 4 connected to the top of the tower body 1, a liquid distributor 6 fixedly connected to the outlet end of the inlet pipe 4 inside the tower body 1, the liquid distributor 6 uniformly distributing the circulating liquid to the entire cross-section inside the tower, ensuring that the liquid flows downward at a certain flow rate and coverage area, and fully contacts the rising gas, a packing layer 7 fixedly disposed in the middle of the tower body 1, the packing layer 7 being located below the liquid distributor 6, the packing layer 7 increasing the gas-liquid contact area through a porous structure, and simultaneously forming a liquid film on the surface of the packing, prolonging the gas-liquid contact time, and enhancing the mass transfer reaction, and a collection tank 8 disposed at the bottom of the tower body 1 for collecting the falling absorption liquid.

[0019] Reference Figure 2 As shown in this embodiment: the liquid distributor 6 includes a fixing frame 61, which is fixed to the upper part of the inner wall of the tower body 1 by welding. A rotating liquid distributor 62 is installed on the fixing frame 61 by screws. One side of the rotating liquid distributor 62 is connected to the liquid inlet pipe 4. A liquid distribution plate 63 is provided below the rotating liquid distributor 62 and is fixed to the inner wall of the tower body 1.

[0020] Reference Figures 3-4 As shown in this embodiment: the rotary distributor 62 includes a motor 621, which is fixed on a mounting frame 61. A dispensing box 623 is fixedly connected to the drive end of the motor 621. Both ends of the dispensing box 623 are attached to the inner wall of the tower body 1. A connecting pipe 622 is rotatably mounted on the top of the dispensing box 623, and the top of the dispensing box 623 is connected to the bottom of the connecting pipe 622. The drive end of the motor 621 passes through the center of the connecting pipe 622 and is rotatably connected to it. Multiple leakage holes 624 are evenly distributed at the bottom of the dispensing box 623. On both sides of the leakage holes 624… Several elastic scrapers 625 are installed by adhesive bonding. The elastic scrapers 625 are fixed to the bottom of the liquid distribution box 623. The elastic scrapers 625 are inverted cone shape, which can reduce liquid residue and particle jamming. The elastic scrapers 625 are wear-resistant silicone brushes. The elastic scrapers 625 are installed in close contact with the surface of the liquid distribution tray 63. The motor 621 drives the liquid distribution box 623 to rotate, so as to achieve uniform liquid distribution. At the same time, the elastic scrapers 625 move synchronously with the liquid distribution box 623, continuously cleaning the surface of the liquid distribution tray 63, which can remove attached particulate impurities in time and avoid particle accumulation and blockage.

[0021] Reference Figure 5As shown in this embodiment: the liquid distribution plate 63 includes a plate body 631, which is fixedly installed on the inner wall of the tower body 1. The plate body 631 is uniformly provided with a number of through holes 632, and the diameter of the through holes 632 is smaller than the diameter of the leakage holes 624. The leakage holes 624 first disperse the liquid initially, and then further refine the liquid flow through the smaller through holes 632, so that the liquid flows out through more small holes, increasing the density of liquid distribution points and avoiding local liquid accumulation caused by excessive flow in a single hole. A number of annular guide strips 633 are uniformly arranged between the through holes 632. Each annular guide strip 633 is a raised structure with a cross-section that is high in the middle and low on both sides. The height difference between the middle and the sides is 2 cm. Every two adjacent annular guide strips 633 form an annular guide groove. The through holes 632 are located in the concave part of the annular guide groove. The through holes 632 are designed as inverted cones to expand the inlet area and facilitate the rapid inflow of liquid.

[0022] Working Principle: During operation, the gas containing pollutants to be treated first enters the tower body 1 through the air inlet 2. The gas then flows upwards. Simultaneously, the circulating liquid is transported to the rotary distributor 62 via the liquid inlet pipe 4. The liquid inlet pipe 4 is connected to the distributor box 623 via the connecting pipe 622, allowing the circulating liquid to enter the distributor box 623. The motor 621 drives the distributor box 623 to rotate. Under centrifugal force, the circulating liquid in the distributor box 623 diffuses to both ends and falls through the evenly spaced holes 624 at the bottom to the distribution plate 63 below. During the rotation of the distributor box 623, the elastic scrapers 625 on both sides of the bottom holes 624 rotate together. The elastic scrapers 625 clean the surface of the distribution plate 63, preventing blockage of the through holes 632. The falling circulating liquid first enters the annular guide groove on the distribution plate 63. The raised structure of the annular guide bar 633 causes the liquid to be evenly distributed along the tank. Then, it flows down through the inverted conical through hole 632 located in the concave part of the guide groove. The circulating liquid flowing down from the liquid distribution plate 63 enters the packing layer 7. Under the action of the porous structure of the packing layer 7, the liquid forms a liquid film on the surface of the packing, which increases the gas-liquid contact area and prolongs the contact time. At this time, the pollutant-containing gas rising from the bottom comes into full contact with the liquid film on the surface of the packing layer 7. The pollutants are absorbed and purified through mass transfer reaction. The purified gas continues to flow upward and is finally discharged through the gas outlet 3 at the top of the tower body 1. The absorbent liquid that has participated in the reaction falls into the liquid collection tank 8 at the bottom of the tower body 1 and is collected. Then, the absorbent liquid in the liquid collection tank 8 is pressurized by an external circulating pump and transported to the liquid distribution device to realize the recycling of the absorbent liquid and reduce operating costs.

[0023] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A device for uniformly distributing circulating liquid in an absorption tower, characterized in that, The tower includes a tower body (1), an air inlet (2) on one side of the bottom of the tower body (1), a liquid outlet pipe (5) on the other side of the bottom of the tower body (1), an air outlet (3) on the top of the tower body (1), a liquid inlet pipe (4) on the side of the tower body (1) near the top, a liquid distributor (6) connected to the liquid outlet end of the liquid inlet pipe (4) inside the tower body (1), and a packing layer (7) in the middle of the tower body (1), the packing layer (7) being located in the liquid distributor. (6) At the bottom, a liquid collection tank (8) is provided at the bottom of the tower body (1). The liquid distributor (6) includes a fixing frame (61). The fixing frame (61) is installed above the inner wall of the tower body (1). A rotating liquid distributor (62) is installed on the fixing frame (61). One side of the rotating liquid distributor (62) is connected to the liquid inlet pipe (4). A liquid distribution plate (63) is provided below the rotating liquid distributor (62). The liquid distribution plate (63) is installed on the inner wall of the tower body (1).

2. The absorber circulating liquid uniform distribution device according to claim 1, characterized in that: The rotating liquid distributor (62) includes a motor (621), which is mounted on a fixed frame (61). The driving end of the motor (621) is connected to a dispensing box (623). The two ends of the dispensing box (623) are attached to the inner wall of the tower body (1). A connecting pipe (622) is installed on the top of the dispensing box (623). The driving end of the motor (621) passes through the center of the connecting pipe (622). A leakage hole (624) is opened at the bottom of the dispensing box (623). Elastic scrapers (625) are installed on both sides of the leakage hole (624). The elastic scrapers (625) are installed at the bottom of the dispensing box (623).

3. The absorber circulating liquid uniform distribution device according to claim 2, characterized in that: The elastic scraper (625) is in the shape of an inverted cone.

4. The absorber circulating liquid uniform distribution device according to claim 3, characterized in that: The elastic scraper (625) is a wear-resistant silicone brush, and the elastic scraper (625) is mounted on the surface of the liquid distribution tray (63).

5. The absorber circulating liquid uniform distribution device according to claim 1, characterized in that: The liquid distribution plate (63) includes a plate body (631), which is installed on the inner wall of the tower body (1). The plate body (631) is provided with through holes (632), and annular guide strips (633) are provided between the through holes (632).

6. The absorber circulating liquid uniform distribution device according to claim 5, characterized in that: The annular guide strip (633) has a raised structure with a cross-section that is high in the middle and low on both sides. Each pair of adjacent annular guide strips (633) forms an annular guide groove, and the through hole (632) is located in the recess of the annular guide groove.

7. The absorber circulating liquid uniform distribution device according to claim 6, characterized in that: The through hole (632) is configured as an inverted cone shape.

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