Absorption tower structure for chemical industry
By installing a demister, especially a three-layer annular fiber demister, inside the absorption tower, the problem of poor demister performance in existing absorption towers has been solved, achieving a more efficient demister effect and meeting emission standards.
Patent Information
- Application Number
- CN202421694894.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The existing absorption towers have poor demisting effect, resulting in gas that fails to meet emission standards and requires further demisting treatment, indicating low absorption efficiency.
A demister is installed inside the absorption tower, including a demister support plate, a liquid sealing device, and a fiber demister. The fiber demister is arranged vertically in a three-layer ring structure to increase the contact time and area between the gas and the demister.
By increasing the contact time and area between the gas and the fiber demister, the adsorption effect on fine droplets in the flue gas is improved, thus enhancing the demisting effect and meeting emission standards without the need for further treatment.
Smart Images
Figure CN223570396U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to gas absorption technical field, especially relate to an absorption tower structure for chemical industry. BACKGROUND
[0002] The absorption tower is the equipment for realizing the absorption operation. According to the gas-liquid phase contact form, it is divided into three categories. The first category is the plate tower, the bubble absorption tower and the stirring bubble absorption tower, and the gas is dispersed in the liquid phase in the form of bubbles. The second category is the ejector and the spray tower, and the liquid is dispersed in the gas phase in the form of droplets. The third category is the packed tower and the falling film absorption tower, and the liquid is in contact with the gas phase in the form of film. The flow mode of the gas-liquid two phases in the tower can be countercurrent or cocurrent. Usually, countercurrent operation is adopted, the absorbent is added from the top and flows downward, is contacted with the gas flowing upward, the liquid absorbing the absorbent is discharged from the bottom, and the purified gas is discharged from the top.
[0003] The gas absorption tower can effectively remove the impurities in the gas. In the absorption tower, the absorption slurry is contacted and mixed with the flue gas, the impurities in the flue gas are chemically reacted with the raw materials in the slurry and the oxidizing air blown in, finally, the impurities are removed, and part of other pollutants in the flue gas, such as dust, are removed. The flue gas after removing the impurities is removed from the small droplets carried out by the demister. The contact area of the gas in the existing absorption tower with the demisting structure is small, and the contact time is short, so that the demisting effect of the absorption tower is poor, and the gas after absorption cannot reach the emission standard and needs to be treated again, which leads to poor absorption efficiency. UTILITY MODEL CONTENTS
[0004] The utility model solves the technical problem of overcoming the defects of the prior art and provides an absorption tower structure for chemical industry.
[0005] In order to solve the above technical problem, the utility model provides the following technical scheme:
[0006] The utility model relates to an absorption tower structure for chemical industry, including tower body, acid distributor and demisting device, the tower body is vertically arranged, the demisting device is located at the top in the tower body, for removing the small droplets carried out by the demister after removing the impurities, the acid distributor is located in the tower body and is located below the demisting device, the bottom of the tower body is equipped with the liquid storage area, the tower body is also equipped with the packing area and the vortex prevention device, the packing area is located between the acid distributor and the liquid storage area, the vortex prevention device is arranged on the bottom wall in the tower body,
[0007] The demisting device comprises a demisting support plate, a plurality of liquid seal devices and a plurality of fiber demisters, the demisting support plate is arranged at the top of the tower body, the plurality of liquid seal devices are arranged on the demisting support plate, and the plurality of fiber demisters are arranged at the top end of the demisting support plate, the number of the fiber demisters is 27, and the fiber demisters are arranged in a three-layer annular structure on the demisting support plate, the innermost annular structure is three vertically and uniformly arranged fiber demisters, the middle annular structure is nine vertically and uniformly arranged fiber demisters, and the outermost annular structure is fifteen vertically and uniformly arranged fiber demisters.
[0008] As a preferred technical scheme of the utility model, the acid distribution device comprises an acid inlet pipe and a tubular acid distributor, the tubular acid distributor is arranged in the tower body and below the demisting device, and the acid inlet pipe is arranged on the tower body and communicates with the tubular acid distributor.
[0009] As a preferred technical scheme of the utility model, the liquid seal device is four, one of which is arranged at the center of the demisting support plate, and the other three are annularly and uniformly arranged on the demisting support plate.
[0010] As a preferred technical scheme of the utility model, the packing zone comprises a packing support plate, a packing pressing plate and absorption packing, the packing support plate and the packing pressing plate are arranged in the tower body and above the liquid storage zone, and have a spacing therebetween, and the absorption packing is filled in the packing support plate and the packing pressing plate.
[0011] As a preferred technical scheme of the utility model, the bottom end outer wall of the tower body is provided with an acid discharge pipe and a support, the vortex prevention device is connected with the acid discharge pipe, the bottom outer wall of the tower body is provided with an air inlet pipe, the air inlet pipe communicates with the liquid storage zone, and the top end outer wall of the tower body is provided with an air outlet pipe.
[0012] Compared with the prior art, the utility model has the beneficial effects as follows:
[0013] The demisting device has a plurality of vertically and annularly arranged fiber demisters, so that the fiber demisters are arranged to increase the contact time and area of the gas and the fiber demisters, thereby improving the adsorption effect on the fine liquid drops in the flue gas after impurity removal. BRIEF DESCRIPTION OF DRAWINGS
[0014] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute a limitation to the utility model.
[0015] Fig. 1 It is the overall structure schematic view of the utility model.
[0016] Fig. 2 is the A-A section structure schematic diagram of the utility model;
[0017] Fig. 3 is the B place enlarged view of the utility model;
[0018] In the figure: 1, tower body;2, acid distribution device;21, acid inlet pipe;22, pipe type acid distributor;3, mist eliminator;31, mist eliminator support plate;32, liquid seal device;33, fiber mist eliminator;4, liquid storage area;5, packing area;51, packing support plate;52, packing press plate;53, absorption packing;6, anti-vortex device;7, acid discharge pipe;8, support;9, air inlet pipe;10, exhaust pipe. DETAILED DESCRIPTION
[0019] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.
[0020] Wherein the same reference numerals in the drawings all refer to the same parts.
[0021] As Figs. 1-3 shown, the utility model provides an absorption tower structure for chemical industry, including tower body 1, acid distribution device 2 and mist eliminator 3, tower body 1 is vertically arranged, mist eliminator 3 is located at the top in tower body 1, and the flue gas after removing impurities is removed through the small liquid drops of fiber mist eliminator, acid distribution device 2 is located in tower body 1 and is below mist eliminator 3, and the bottom in tower body 1 is equipped with liquid storage area 4, and tower body 1 is also equipped with packing area 5 and anti-vortex device 6, and packing area 5 is located between acid distribution device 2 and liquid storage area 4, and anti-vortex device 6 is located on the bottom wall in tower body 1.
[0022] In the embodiment, the acid liquid to be absorbed is sprayed into tower body 1 through acid distribution device 2, and after acid distribution, the acid liquid is reacted and absorbed through the packing area 5 below acid distribution device 2, and the acid liquid after absorption is collected into liquid storage area 4, and the anti-vortex device 6 of the prior art is used to prevent vortex when discharging liquid, and the gas from the bottom of tower body 1 is contacted and reacted with the acid liquid through packing area 5, and the gas after completing the reaction continues to move upwards to tower body 1 and contacts mist eliminator 3, and the small liquid drops in the gas are adsorbed through mist eliminator 3, and the gas after completing the liquid drop adsorption is discharged from tower body 1.
[0023] Further, mist eliminator 3 includes mist eliminator support plate 31, a plurality of liquid seal devices 32 and a plurality of fiber mist eliminators 33, mist eliminator support plate 31 is located at the top in tower body 1, a plurality of liquid seal devices 32 are located on mist eliminator support plate 31, and a plurality of fiber mist eliminators 33 are located at the top end of mist eliminator support plate 31.
[0024] In this embodiment, the existing technology exhaust valve on the demisting support plate 31 can make the gas reacted with the acid liquid pass from bottom to top, the liquid seal device 32 can prevent the backflow of the gas, and the liquid seal device 32 can cut off the connection between the gas and the liquid by using the liquid sealing method to prevent the gas from flowing into the packing layer to damage the packing, and the gas above the demisting support plate 31 contacts the plurality of fiber mist eliminators 33 using the existing technology, and the fine liquid droplets in the gas are adsorbed by the fiber mist eliminators 33.
[0025] Further, the number of the fiber mist eliminators 33 is 27, and the fiber mist eliminators 33 are arranged in a three-layer annular structure on the demisting support plate 31, the innermost annular structure is three vertically and uniformly arranged fiber mist eliminators 33, the middle annular structure is nine vertically and uniformly arranged fiber mist eliminators 33, and the outermost annular structure is fifteen vertically and uniformly arranged fiber mist eliminators 33.
[0026] In this embodiment, the fiber mist eliminators 33 arranged in a multi-layer annular structure and vertically placed can increase the contact time and area of the gas, thereby achieving better fine liquid droplet adsorption effect, and the top ends of each fiber mist eliminator 33 are connected to each other to reduce the shaking of the fiber mist eliminator 33 during use.
[0027] Further, the acid distribution device 2 includes an acid inlet pipe 21 and a tubular acid distributor 22, the tubular acid distributor 22 is arranged in the tower body 1 and located below the demisting device 3, and the acid inlet pipe 21 is arranged on the tower body 1 and communicates with the tubular acid distributor 22.
[0028] In this embodiment, the acid liquid enters the tubular acid distributor 22 using the existing technology through the acid inlet pipe 21, and the acid liquid is distributed to the surface of the packing by the tubular acid distributor 22 to facilitate the absorption of the acid liquid.
[0029] Further, the liquid seal device 32 is four, one of which is arranged at the center of the demisting support plate 31, and the other three are annularly and uniformly arranged on the demisting support plate 31.
[0030] Further, the packing area 5 includes a packing support plate 51, a packing pressing plate 52, and an absorption packing 53, the packing support plate 51 and the packing pressing plate 52 are located in the tower body 1 and above the liquid storage area 4, and have a spacing therebetween, and the absorption packing 53 is filled in the packing support plate 51 and the packing pressing plate 52.
[0031] In this embodiment, the gas entering the tower body 1 contacts the absorption packing 53 through the packing support plate 51, and the acid liquid contacts the absorption packing 53 through the packing pressing plate 52, and the reaction gas and the acid liquid react with the absorption packing 53 to achieve the purpose of absorbing the acid.
[0032] The absorption packing 53 adopts a rectangular saddle ring-shaped packing.
[0033] Further, the bottom end outer wall of the tower body 1 is provided with an acid discharge pipe 7 and a support 8, the vortex prevention device 6 is connected with the acid discharge pipe 7, the bottom outer wall of the tower body 1 is provided with an air inlet pipe 9, the air inlet pipe 9 is communicated with the liquid storage area 4, and the top end outer wall of the tower body 1 is provided with an air outlet pipe 10.
[0034] In the embodiment, the acid discharge pipe 7 is used for discharging liquid at the bottom of the tower body 1, and cooperates with the vortex prevention device 6 to prevent vortex during liquid discharge, the support 8 is used for supporting the tower body 1, the support 8 is fixed with the ground, reaction gas is introduced into the tower body 1 through the air inlet pipe 9, and the gas after completing demisting is discharged from the air outlet pipe 10.
[0035] The tower body 1 is provided with multiple manholes, multiple pressure gauge interfaces and an observation window.
[0036] The utility model discloses a kind of absorption tower structures for chemical industry, multiple vertical annular arrangement fiber mist eliminators are provided in demisting device, so that the fiber mist eliminators are arranged to increase the time and area of gas and fiber mist eliminator contact, thereby improve the adsorption effect of fine liquid drops in flue gas after impurity removal.
[0037] Finally, it should be noted that: the above is only preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part technical features. Any modification, equivalent replacement, improvement etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A chemical absorption tower structure, characterized in that, The tower includes a tower body (1), an acid separation device (2), and a demister (3). The tower body (1) is vertically arranged. The demister (3) is located at the top of the tower body (1) and is used to remove the fine droplets carried out by the flue gas after impurities are removed. The acid separation device (2) is located inside the tower body (1) and below the demister (3). The bottom of the tower body (1) is provided with a liquid storage area (4). The tower body (1) is also provided with a packing area (5) and an anti-vortex device (6). The packing area (5) is located between the acid separation device (2) and the liquid storage area (4). The anti-vortex device (6) is located on the bottom wall of the tower body (1). The demisting device (3) includes a demisting support plate (31), multiple liquid sealing devices (32) and multiple fiber demisters (33). The demisting support plate (31) is located at the top of the tower body (1). The multiple liquid sealing devices (32) are located on the demisting support plate (31). The multiple fiber demisters (33) are located at the top of the demisting support plate (31). The number of fiber demisters (33) is 27, and they are arranged in a three-layer ring structure on the demisting support plate (31). The innermost ring structure consists of 3 vertically evenly distributed fiber demisters (33), the middle ring structure consists of 9 vertically evenly distributed fiber demisters (33), and the outermost ring structure consists of 15 vertically evenly distributed fiber demisters (33).
2. The absorption tower structure for chemical applications according to claim 1, characterized in that, The acid separation device (2) includes an acid inlet pipe (21) and a tubular acid separator (22). The tubular acid separator (22) is located inside the tower body (1) and below the demisting device (3). The acid inlet pipe (21) is located on the tower body (1) and is connected to the tubular acid separator (22).
3. The absorption tower structure for chemical applications according to claim 1, characterized in that, There are four liquid sealing devices (32), one of which is located at the center of the demisting support plate (31), and the other three are evenly distributed in a ring on the demisting support plate (31).
4. The absorption tower structure for chemical applications according to claim 1, characterized in that, The packing zone (5) includes a packing support plate (51), a packing pressure plate (52), and an absorption packing (53). The packing support plate (51) and the packing pressure plate (52) are located inside the tower body (1) and above the liquid storage zone (4), with a gap between them. The absorption packing (53) is filled in the packing support plate (51) and the packing pressure plate (52).
5. A chemical absorption tower structure according to any one of claims 1-4, characterized in that, The bottom outer wall of the tower body (1) is provided with an acid discharge pipe (7) and a support (8). The anti-vortex device (6) is connected to the acid discharge pipe (7). The bottom outer wall of the tower body (1) is provided with an air inlet pipe (9). The air inlet pipe (9) is connected to the liquid storage area (4). The top outer wall of the tower body (1) is provided with an exhaust pipe (10).