Sulfuric acid drying tower

Abstract

The utility model provides a sulfuric acid drying tower, which belongs to the technical field of sulfuric acid preparation and comprises a drying tower, an acid storage tank and a negative pressure mechanism. An inner cavity of the drying tower is sequentially provided with a liquid storage cavity, a filler layer and a liquid inlet cavity from bottom to top, a partition plate is arranged in the middle of the liquid inlet cavity and divides the liquid inlet cavity into an upper cavity and a lower cavity, a demister is arranged on the upper end face of the partition plate, and an acid distributor is arranged below the partition plate and located in the lower cavity; an acid supply pipeline is arranged at the top of the acid storage tank, a power pump is arranged on the acid supply pipeline, and the acid supply pipeline is communicated with the lower cavity; the negative pressure mechanism comprises an air filter and an exhaust pipeline, the air filter is communicated with the liquid storage cavity through an air pipeline, the exhaust pipeline is communicated with the upper cavity, and an air blower is arranged on the exhaust pipeline. According to the sulfuric acid drying tower provided by the utility model, air can be prevented from remaining in the drying tower, sulfuric acid liquid gas mixed in the air is blocked, and the drying efficiency is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sulfuric acid preparation, and more specifically, relates to a sulfuric acid drying tower. Background Technique

[0002] A sulfuric acid drying tower is a device that uses sulfuric acid to dry air in chemical production. Its main function is to use sulfuric acid to absorb moisture in the air. The drying process is usually carried out in the tower, which is filled with sulfuric acid, and at the same time, the moisture is separated from the sulfuric acid through spraying or a packing layer.

[0003] In the prior art, sulfuric acid flows out from the bottom of the tower through spraying or a packing layer in the drying tower. After the air passes through the drying tower, the moisture in the air is absorbed by the sulfuric acid. However, in this way, part of the air will remain in the drying tower, or the air will be discharged with part of the sulfuric acid liquid, and the drying efficiency is poor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sulfuric acid drying tower, aiming to solve the problem that part of the air remains in the drying tower, or the air is discharged with part of the sulfuric acid liquid, resulting in poor drying efficiency.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a sulfuric acid drying tower, including:

[0006] A drying tower, in which a liquid storage chamber, a packing layer, and a liquid inlet chamber are sequentially arranged in the inner cavity of the drying tower from bottom to top. A partition plate is arranged in the middle of the liquid inlet chamber, and the partition plate divides the liquid inlet chamber into an upper chamber and a lower chamber. A demister is arranged on the upper end surface of the partition plate, and a plurality of ventilation holes are opened on the partition plate corresponding to the demister. The demister is located in the upper chamber, and a acid distributor is arranged below the partition plate, and the acid distributor is located in the lower chamber;

[0007] An acid storage tank, a acid supply pipeline is arranged on the top of the acid storage tank, a power pump is arranged on the acid supply pipeline, the lower end of the acid supply pipeline extends to the bottom of the inner cavity of the acid storage tank, and the upper end of the acid supply pipeline is connected to the side wall of the drying tower and communicates with the lower chamber;

[0008] A negative pressure mechanism, the negative pressure mechanism includes an air filter and an exhaust pipeline. The air filter is connected to the upper part of the liquid storage chamber through an air pipeline, the exhaust pipeline is connected to the top of the drying tower and communicates with the upper chamber, and a blower is arranged on the exhaust pipeline.

[0009] In a possible implementation manner, filter mesh plates are arranged at both the upper end and the lower end of the packing layer.

[0010] In a possible implementation, the demister includes a plurality of demister cylinders with openings facing downward and sealedly fastened to the upper end surface of the partition, the demister cylinders are provided with a plurality of holes, and the partition plate is provided with a plurality of ventilation holes corresponding to a single demister cylinder.

[0011] In a possible implementation, the acid distributor includes a plurality of circular pipes and a plurality of connecting pipes, the plurality of circular pipes are concentrically arranged, the plurality of connecting pipes are radially connected to the plurality of circular pipes in sequence, the upper end of the acid supply pipe is connected to the outer layer of the circular pipes, and a plurality of spray holes are provided in the circumferential direction of the upper end and the circumferential direction of the lower end of the circular pipe.

[0012] In a possible implementation, the multiple spray holes at the upper end of the annular pipe and the multiple spray holes at the lower end of the annular pipe are arranged alternately.

[0013] In a possible implementation, an acid return pipeline is provided at the bottom of the acid storage tank, and the acid return pipeline is connected to the bottom of the side wall of the drying tower.

[0014] In one possible implementation, a liquid level gauge is provided on the inner wall of the liquid storage chamber, and the liquid level gauge is located below the port where the air pipe is connected to the liquid storage chamber. An opening and closing valve is provided on the acid return pipe, and the liquid level gauge controls the opening and closing of the opening and closing valve through a controller.

[0015] In a possible implementation, the air duct is arranged to be inclined downward from the air filter toward the drying tower.

[0016] In a possible implementation, a return air duct is provided at the lower portion of the outer wall of the drying tower.

[0017] The beneficial effect of a sulfuric acid drying tower provided by the utility model is that: compared with the prior art, the power pump on the acid supply pipeline is turned on, and the acid supply pipeline sucks sulfuric acid in the acid storage tank into the acid distributor, and the sulfuric acid is dispersed into the lower chamber of the liquid inlet cavity under the action of the acid distributor, and the sulfuric acid falls into the liquid storage cavity after passing through the packing layer. The air filter is connected to the liquid storage cavity through the air pipeline, and the exhaust pipeline provided with a blower is connected to the liquid inlet cavity. The blower is turned on, and the external air enters the liquid storage cavity through the air filter and the air pipeline. The external air of the liquid storage cavity passes through the packing layer, the lower chamber of the liquid inlet cavity and the upper chamber in sequence. After the external air is fully in contact with sulfuric acid, it passes through the demister and is finally discharged through the exhaust pipeline, and finally the drying of sulfuric acid is completed. A sulfuric acid drying tower provided by the utility model forms a negative pressure under the action of the blower, and the air introduced from the outside is discharged from the bottom to the top, avoiding the problem of air remaining in the drying tower. The demister can finally filter the air discharged from the drying tower, block the sulfuric acid liquid gas mixed in the air, and ensure the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a sulfuric acid drying tower provided by the present utility model;

[0020] Figure 2 For Figure 1 The sectional view along A - A in

[0021] In the figure: 1, drying tower; 2, liquid storage cavity; 3, packing layer; 4, liquid inlet cavity; 5, partition plate; 6, demisting cylinder; 7, ventilation hole; 8, circular pipe; 9, connecting pipe; 10, spray hole; 11, filter screen plate; 12, acid storage tank; 13, acid supply pipe; 14, power pump; 15, air filter; 16, air pipe; 17, exhaust pipe; 18, blower; 19, acid return pipe; 20, liquid level gauge; 21, opening and closing valve; 22, return air pipe. Specific embodiments

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clearly understood, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] Unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., they are all used to distinguish different objects and are not used to describe a specific order.

[0024] Unless otherwise clearly defined, for orientation terms, when using terms such as "center", "horizontal", "vertical", "level", "vertical", "top", "bottom", "inner", "outer", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present utility model.

[0025] Please refer to Figure 1, a sulfuric acid drying tower provided by the present utility model will be described hereinafter. A sulfuric acid drying tower includes a drying tower 1, an acid storage tank 12, and a negative pressure mechanism.

[0026] Inside the drying tower 1, a liquid storage chamber 2, a packing layer 3, and a liquid inlet chamber 4 are sequentially arranged from bottom to top. In the middle of the liquid inlet chamber 4, a partition plate 5 is provided. The partition plate 5 divides the liquid inlet chamber 4 into an upper chamber and a lower chamber. A demister is arranged on the upper end surface of the partition plate 5. A plurality of ventilation holes 7 are provided on the partition plate 5 corresponding to the demister. The demister is located in the upper chamber. Below the partition plate 5, a acid distributor is provided. The acid distributor is located in the lower chamber; at the top of the acid storage tank 12, an acid supply pipe 13 is provided. A power pump 14 is arranged on the acid supply pipe 13. The lower end of the acid supply pipe 13 extends to the bottom of the inner cavity of the acid storage tank 12. The upper end of the acid supply pipe 13 is connected to the side wall of the drying tower 1 and communicates with the lower chamber; the negative pressure mechanism includes an air filter 15 and an exhaust pipe 17. The air filter 15 is connected to the upper part of the liquid storage chamber 2 through an air pipe 16. The exhaust pipe 17 is connected to the top of the drying tower 1 and communicates with the upper chamber. A blower 18 is arranged on the exhaust pipe 17.

[0027] For the sulfuric acid drying tower provided by the present utility model, compared with the prior art, when the power pump 14 on the acid supply pipe 13 is turned on, the acid supply pipe 13 sucks the sulfuric acid in the acid storage tank 12 into the acid distributor. Under the action of the acid distributor, the sulfuric acid is dispersed into the lower chamber of the liquid inlet chamber 4. After passing through the packing layer 3, the sulfuric acid falls into the liquid storage chamber 2. The air filter 15 is connected to the liquid storage chamber 2 through the air pipe 16. The exhaust pipe 17 provided with the blower 18 is connected to the liquid inlet chamber 4. When the blower 18 is turned on, the external air enters the liquid storage chamber 2 through the air filter 15 and the air pipe 16. The external air in the liquid storage chamber 2 sequentially passes through the packing layer 3, the lower chamber and the upper chamber of the liquid inlet chamber 4. After the external air is fully contacted with the sulfuric acid, it passes through the demister and is finally discharged through the exhaust pipe 17, thus finally completing the drying of the sulfuric acid. The sulfuric acid drying tower provided by the present utility model can form a negative pressure channel inside the drying tower 1. During the process of ensuring the sulfuric acid flowing from top to bottom, under the action of the blower 18, a negative pressure is formed, and the externally introduced air is discharged from bottom to top, avoiding the problem of air remaining in the drying tower 1. The demister can finally filter the air discharged from the drying tower 1, blocking the sulfuric acid liquid mixed in the air and ensuring the drying efficiency.

[0028] Wherein, filter mesh plates 11 are arranged at both the upper and lower ends of the packing layer 3, which can ensure that the sulfuric acid liquid passes through from top to bottom, while blocking the impurities in the sulfuric acid liquid. At the same time, it can ensure that the external air passes through from bottom to top, while blocking the impurities in the external air. In addition, the filter mesh plates 11 at the upper and lower parts of the packing layer 3 can also support the packing layer 3, improving the stability of the packing layer 3.

[0029] Specifically, the demister includes a plurality of demisting cylinders 6 with their openings facing downward and hermetically buckled on the upper end surface of the partition plate. The top of the demisting cylinder 6 is in a closed state. A plurality of holes are arranged on the demisting cylinder 6, and the plurality of holes are distributed on the outer periphery and the top of the demisting cylinder 6. A plurality of ventilation holes 7 are provided on the partition plate 5 corresponding to a single demisting cylinder 6. The plurality of ventilation holes 7 are evenly arranged on the partition plate 5 corresponding to the lower port of the demisting cylinder 6, enabling the external air mixed with sulfuric acid solution to enter the demisting cylinder 6 through the plurality of ventilation holes 7, and then be discharged into the upper chamber of the liquid outlet chamber through the plurality of holes on the demisting cylinder 6 while blocking the sulfuric acid solution in the air. The dry air finally is discharged through the exhaust pipe 17.

[0030] Please refer to Figure 2 , the acid distributor includes a plurality of circular pipes 8 and a plurality of connecting pipes 9. The plurality of circular pipes 8 are concentrically arranged. The plurality of connecting pipes 9 are radially connected to the plurality of circular pipes 8 in a radial pattern in sequence. The upper end of the acid supply pipe 13 is connected to the outer circular pipe 8. A plurality of spray holes 10 are provided on the circumferences of the upper end and the lower end of the circular pipe 8. Sulfuric acid enters the outer circular pipe 8 through the acid supply pipe 13 and sequentially enters the inner circular pipes 8 through the plurality of connecting pipes 9. Finally, the sulfuric acid is sprayed upward and downward through the plurality of spray holes 10 on the circumferences of the upper end and the lower end of the circular pipe 8, so as to achieve the effect of dispersing the sulfuric acid.

[0031] Preferably, the plurality of spray holes 10 at the upper end of the circular pipe 8 and the plurality of spray holes 10 at the lower end of the circular pipe 8 are alternately arranged to avoid the overlap of the positions of the spray holes 10 at the upper end and the lower end, thereby reducing the pressure when the sulfuric acid is sprayed and reducing the dispersion effect of the sulfuric acid.

[0032] In addition, a return acid pipe 19 is provided at the bottom of the acid storage tank 12. The return acid pipe 19 is connected to the bottom of the side wall of the drying tower 1. The sulfuric acid passing through the drying tower 1 returns to the acid storage tank 12 again to perform the next cycle of drying the air, so as to achieve the purpose of continuously drying the air.

[0033] Preferably, a liquid level gauge 20 is provided on the inner wall of the liquid storage chamber 2. The liquid level gauge 20 is located below the port where the air pipe 16 is connected to the liquid storage chamber 2. An opening and closing valve 21 is provided on the return acid pipe 19. The liquid level gauge 20 controls the opening and closing of the opening and closing valve 21 through a controller. When the sulfuric acid liquid level in the liquid storage chamber 2 reaches the position of the liquid level gauge 20, the liquid level gauge 20 sends a control signal through the controller to control the opening of the opening and closing valve 21. The sulfuric acid in the liquid storage chamber 2 flows back to the acid storage tank 12. The controller can adopt an intermittent closing method, that is, after 1 minute, the controller controls the opening and closing valve 21 to close. Two liquid level gauges 20 can also be provided, one at a high level and the other at a low level. When the sulfuric acid liquid level reaches the high-level liquid level gauge 20, the opening and closing valve 21 opens. When the sulfuric acid liquid level reaches the low-level liquid level gauge 20, the opening and closing valve 21 closes.

[0034] Preferably, the air duct 16 is arranged to slope downward from the air filter 15 towards the drying tower 1. The air entering the liquid storage chamber 2 from the outside faces the sulfuric acid liquid surface, which can cause the sulfuric acid to churn or shake, increasing the contact area between the air and the sulfuric acid and improving the drying effect.

[0035] In addition, a return air duct 22 is provided at the lower part of the outer wall of the drying tower 1. The return air duct 22 is connected to other tanks storing sulfuric acid and can absorb the sulfuric acid liquid gas evaporated from the sulfuric acid in the tanks simultaneously.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sulfuric acid drying tower, characterized in that, Including: A drying tower (1), in the inner cavity of the drying tower (1), a liquid storage cavity (2), a packing layer (3) and a liquid inlet cavity (4) are sequentially arranged from bottom to top. A partition plate (5) is arranged in the middle of the liquid inlet cavity (4). The partition plate (5) divides the liquid inlet cavity (4) into an upper chamber and a lower chamber. A demister is arranged on the upper end surface of the partition plate (5). A plurality of ventilation holes (7) are formed in the partition plate (5) corresponding to the demister. The demister is located in the upper chamber. A acid distributor is arranged below the partition plate (5), and the acid distributor is located in the lower chamber; An acid storage tank (12), a acid supply pipeline (13) is arranged at the top of the acid storage tank (12). A power pump (14) is arranged on the acid supply pipeline (13). The lower end of the acid supply pipeline (13) extends to the bottom of the inner cavity of the acid storage tank (12). The upper end of the acid supply pipeline (13) is connected to the side wall of the drying tower (1) and communicated with the lower chamber; A negative pressure mechanism, the negative pressure mechanism includes an air filter (15) and an exhaust pipeline (17). The air filter (15) is communicated with the upper part of the liquid storage cavity (2) through an air pipeline (16). The exhaust pipeline (17) is connected to the top of the drying tower (1) and communicated with the upper chamber. A blower (18) is arranged on the exhaust pipeline (17).

2. The sulfuric acid drying tower according to claim 1, wherein Filter mesh plates (11) are arranged at both the upper end and the lower end of the packing layer (3).

3. The sulfuric acid drying tower according to claim 1, characterized in that, The demister includes a plurality of demister cylinders (6) with openings facing downwards and hermetically buckled on the upper end surface of the partition plate. A plurality of holes are arranged on the demister cylinder (6). A plurality of the ventilation holes (7) are formed in the partition plate (5) corresponding to a single demister cylinder (6).

4. A sulfuric acid drying tower according to claim 1, characterized in that, The acid distributor includes a plurality of circular ring pipelines (8) and a plurality of connecting pipelines (9). The plurality of circular ring pipelines (8) are concentrically arranged. The plurality of connecting pipelines (9) are radially connected to the plurality of circular ring pipelines (8) in a radial manner in sequence. The upper end of the acid supply pipeline (13) is communicated with the outermost circular ring pipeline (8). A plurality of spray holes (10) are arranged on the circumferences of the upper end and the lower end of the circular ring pipeline (8).

5. The sulfuric acid drying tower according to claim 4, wherein The plurality of spray holes (10) at the upper end of the circular ring pipeline (8) and the plurality of spray holes (10) at the lower end of the circular ring pipeline (8) are arranged alternately.

6. A sulfuric acid drying tower as claimed in claim 1, wherein, A acid return pipeline (19) is arranged at the bottom of the acid storage tank (12). The acid return pipeline (19) is connected to the bottom of the side wall of the drying tower (1).

7. The sulfuric acid drying tower according to claim 6, characterized in that, A liquid level gauge (20) is arranged on the inner wall of the liquid storage cavity (2). The liquid level gauge (20) is located below the port where the air pipeline (16) is connected to the liquid storage cavity (2). An opening and closing valve (21) is arranged on the acid return pipeline (19). The liquid level gauge (20) controls the opening and closing of the opening and closing valve (21) through a controller.

8. A sulfuric acid drying tower according to claim 1, characterized in that, The air pipeline (16) is arranged obliquely downwards from the air filter (15) to the drying tower (1).

9. A sulfuric acid drying tower as claimed in claim 1, wherein, A return air pipeline (22) is arranged at the lower part of the outer wall of the drying tower (1).

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