An air cooling tower

Abstract

The utility model relates to an air cooling tower, including the tower body, the first filler layer, cooling water delivery pipe, the second filler layer, refrigerated water delivery pipe and silk screen coalescer are sequentially arranged from below to above in the tower body, and the cooling water delivery pipe and refrigerated water delivery pipe all are provided with the shower head respectively, and the baffle is arranged between refrigerated water delivery pipe and silk screen coalescer, and the return liquid connector is arranged on the tower body of baffle and silk screen coalescer, the first elbow and the second elbow are arranged on the baffle, the included angle of the central axis of first elbow outlet end and the central axis of tower body and the included angle of the central axis of second elbow outlet end and the central axis of tower body all adopt 80 degrees to 90 degrees, and the included angle between the central axis of first elbow outlet end and the central axis of second elbow outlet end adopts 150 degrees to 210 degrees. Realize the use of relatively simpler component structure to convert compressed air into the rotating ascending airflow to realize the water in the airflow preliminary separation. The utility model is convenient to use, and has wide market prospect.

Description

Technical Field

[0001] This utility model relates to the field of air separation equipment, specifically to an air-cooled tower. Background Technology

[0002] Air separation precooling units mainly involve air-cooled towers and water-cooled towers. The primary function of the air separation unit is to cool compressed gas. This cooling process brings the air to the optimal temperature required by the molecular sieve, ensuring the molecular sieve adsorption rate while reducing energy consumption. During operation, the air precooling system also reduces air humidity, further lowering the adsorption load and reducing energy consumption. In addition, the air precooling system can remove acidic gases from the air. The outlet temperature of the air-cooled tower directly affects the temperature of the gas to be locked after cooling, thus indirectly affecting the molecular sieve adsorption performance. Therefore, controlling the outlet temperature of the air-cooled tower is crucial during air separation unit operation, as it directly impacts the unit's operational stability and safety, as well as its energy consumption.

[0003] During the transition from low to high load in the air separation system, the main air compressor's output power increases, supplying more compressed air to the air-cooled tower to obtain more distillation feedstock air. Simultaneously, this means the air-cooled tower needs to supply more cooled and dehydrated compressed air to the downstream purification system. While the cooling process can be increased synchronously with the compressed air supply, the dehydration of the compressed air is primarily achieved by the air-cooled tower's wire mesh coalescer. The continuously increasing airflow velocity supplied to the wire mesh coalescer can easily lead to localized punctures, resulting in excessive moisture content in the compressed air supplied to the purification system. Existing technologies address this issue by sequentially cooling the compressed air with cooling water and chilled water, then performing preliminary dehydration via a hydrocyclone separator, followed by a second dehydration process using a wire mesh coalescer. However, the hydrocyclone separator is relatively complex in structure and there is still room for improvement. The goal is to simplify the structure and achieve the technical objective of preliminary water removal, and the compressed air after water removal will no longer directly impact the layered wire mesh coalescer, thus reducing the technical problem of excessive moisture in the compressed air due to localized puncture of the wire mesh coalescer. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an air-cooled tower that can convert compressed air into a rotating and rising airflow using relatively simpler components to achieve preliminary separation of water mist carried in the compressed air, thereby overcoming the deficiencies in existing technologies.

[0005] The technical solution adopted by this utility model is as follows: an air-cooled tower, including a tower body, wherein a first packing layer, a cooling water conveying pipe, a second packing layer, a chilled water conveying pipe, and a wire mesh coalescer are arranged sequentially from bottom to top in the tower body. Nozzles are respectively provided on the side of the cooling water conveying pipe facing the first packing layer and the side of the chilled water conveying pipe facing the second packing layer. A partition is provided between the chilled water conveying pipe and the wire mesh coalescer. A return pipe is provided on the tower body between the partition and the wire mesh coalescer. A first elbow and a second elbow are provided on the partition. The angle between the central axis of the outlet end of the first elbow and the central axis of the tower body, and the angle between the central axis of the outlet end of the second elbow and the central axis of the tower body, are both between 80 degrees and 90 degrees. The angle between the central axis of the outlet end of the first elbow and the central axis of the outlet end of the second elbow is between 150 degrees and 210 degrees.

[0006] Preferably, a support plate is provided inside the tower body between the partition and the chilled water delivery pipe. The number of support plates is several, and the several support plates are evenly distributed in a star shape on the inner wall of the tower body around the central axis of the tower body. A first guide ring is provided on the several support plates, and a second guide ring is provided on the top of the first guide ring. The partition is installed on the top of the inner cavity of the second guide ring. Both the first guide ring and the second guide ring adopt an annular structure. The diameter of the outer circle of the first guide ring and the diameter of the inner circle at the bottom of the second guide ring gradually increase along the direction from near the support plate to far away from the support plate.

[0007] Preferably, each of the support plates includes a longitudinal plate and a transverse plate at the top of the longitudinal plate. Each support plate and the first guide ring are respectively provided with a first fixing bolt, and each support plate and the second guide ring are respectively provided with a second fixing bolt. The number of support plates is at least three.

[0008] Preferably, the return liquid pipe and the tower body below the first packing layer are connected by a return liquid delivery pipe, and a liquid level sensor is installed on the tower body below the first packing layer.

[0009] Preferably, the angle between the central axis of the first elbow outlet end and the central axis of the tower body, and the angle between the central axis of the second elbow outlet end and the central axis of the tower body, are both 90 degrees, and the central axis of the first elbow outlet end and the central axis of the second elbow outlet end are 180 degrees.

[0010] Preferably, the partition is provided with tear ducts.

[0011] The beneficial effects of this utility model are as follows: First, this utility model uses the first and second bends to guide the compressed air, thereby forming a spiral upward airflow to achieve preliminary separation of moisture carried in the compressed air. Furthermore, the compressed air guided by the first and second bends impacts the inner wall of the tower, consuming some kinetic energy and reducing the direct impact on the wire mesh coalescer. Compared with the prior art that uses a hydrocyclone separator for preliminary gas-liquid separation, this product uses the first and second bends to guide the compressed air to form a spiral upward airflow, which is a simpler structure. At the same time, since the compressed air transported by the first and second bends is directly delivered to the inner wall of the tower, consuming some kinetic energy, the technical problem of excessive moisture in the compressed air transported outward through the tower caused by the increased compressed air flow directly impacting the wire mesh coalescer is reduced.

[0012] Secondly, a liquid level sensor is installed on the tower body below the first packing layer of this invention; the installation of the liquid level sensor facilitates feedback on the liquid level height inside the tower body below the first packing layer.

[0013] This utility model has a simple structure, is easy to operate, and has a clever design, which greatly improves work efficiency and has good social and economic benefits. It is a product that is easy to promote and use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 for Figure 1 A magnified view of detail A.

[0016] Figure 3 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0017] like Figures 1 to 3 As shown, an air-cooled tower includes a tower body 1. From bottom to top, the tower body 1 contains a first packing layer 2, a cooling water delivery pipe 3, a second packing layer 4, a chilled water delivery pipe 5, and a wire mesh coalescer 6. Spray nozzles 7 are respectively installed on the side of the cooling water delivery pipe 3 facing the first packing layer 2 and on the side of the chilled water delivery pipe 5 facing the second packing layer 4. A partition 8 is installed between the chilled water delivery pipe 5 and the wire mesh coalescer 6. A return pipe 9 is installed on the tower body 1 between the partition 8 and the wire mesh coalescer 6. A first elbow 10 and a second elbow 11 are installed on the partition 8. The angle between the central axis of the outlet end of the first elbow 10 and the central axis of the tower body 1, and the angle between the central axis of the outlet end of the second elbow 11 and the central axis of the tower body 1, are both between 80 and 90 degrees. The angle between the central axis of the outlet end of the first elbow 10 and the central axis of the outlet end of the second elbow 11 is between 150 and 210 degrees.

[0018] In the existing process, the baffle 8 is installed on the support device inside the tower body 1 by welding. Furthermore, the installed baffle 8 requires a certain level of horizontality to facilitate the drainage of water temporarily stored above the baffle 8 within the tower body 1. More specifically, the baffle 8 is fully welded to the support device inside the tower body 1. If the levelness of the baffle 8 does not meet the requirements, it needs to be cut and reinstalled. To facilitate the installation of the baffle 8 at the preset level, this product includes a support plate 12 inside the tower body 1 between the baffle 8 and the chilled water delivery pipe 5. The support plates 12 are arranged in a star shape and evenly distributed on the inner wall of the tower body 1 around the central axis of the tower body 1. Each support plate 12 has a first guide ring 13, and a second guide ring 14 is positioned at the top of each first guide ring 13. The partition plate 8 is installed at the top of the inner cavity of the second guide ring 14. Both the first guide ring 13 and the second guide ring 14 are annular structures. The diameter of the outer circle of the first guide ring 13 and the diameter of the inner circle at the bottom of the second guide ring 14 gradually increase from near the support plate 12 to far away from it. The partition plate 8 is installed to a predetermined level by the guidance formed by the first guide ring 13 and the second guide ring 14. Furthermore, each support plate 12 includes a longitudinal plate and a transverse plate at the top of the longitudinal plate. Each support plate 12 and the first guide ring 13 are respectively provided with a first fixing bolt 15, and each support plate 12 and the second guide ring 14 are respectively provided with a second fixing bolt 16. At least three support plates 12 are used. The first guide ring 13 is installed to a preset level using several first fixing bolts 15, and the position of the second guide ring 14 is fixed using several second fixing bolts 16, thereby fixing the position of the partition 8.

[0019] Since the compressed air carrying relatively little moisture through the first bend 10 and the second bend 11 travels in the form of water mist, the water separated by the spiral upward airflow formed by the compressed air through the first bend 10 and the second bend 11, as well as the water discharged through the wire mesh coalescer 6, will accumulate in the tower body 1 above the partition 8. To facilitate the recovery of this water accumulated in the tower body 1 above the partition 8, the return liquid pipe 9 and the tower body 1 below the first packing layer 2 are connected by a return liquid conveying pipe 17. An air inlet pipe is provided at the outlet end of the liquid delivery pipe 17 and the tower body 1. An air outlet pipe is provided on the tower body 1 above the wire mesh coalescer 6. A water return pipe is provided at the bottom end of the tower body 1. The inlet end of the water return pipe is located below the outlet end of the liquid return delivery pipe 17. The water in the tower body 1 above the baffle 8 is sent back to the bottom of the tower body 1 through the liquid return delivery pipe 17, and a liquid seal is formed by the liquid temporarily stored at the bottom of the tower body 1. This facilitates the continuous delivery of water in the tower body 1 above the baffle 8 to the bottom of the tower body 1 by utilizing the height difference between the water in the tower body 1 above the baffle 8 and the bottom of the tower body 1. More specifically, a liquid level sensor 18 is provided on the tower body 1 below the first packing layer 2. The liquid level sensor 18 facilitates the feedback of the liquid level height in the tower body 1 below the first packing layer 2.

[0020] Furthermore, to facilitate the formation of a spiraling upward airflow through the first bend 10 and the second bend 11, the angles between the central axis of the first bend 10 outlet and the central axis of the tower body 1, and between the central axis of the second bend 11 outlet and the central axis of the tower body 1, are both 90 degrees. The central axes of the first bend 10 outlet and the second bend 11 outlet are 180 degrees. In the prior art, the inner cavity of the tower body 1 between the upper and lower end caps is cylindrical. This product utilizes a portion of the cylindrical inner cavity of the tower body 1 as a guide to continuously deliver airflow to the first bend 10 and the second bend 11, forming a spiraling upward airflow.

[0021] When this product is parked for maintenance, tear holes 19 are provided on the partition 8 to facilitate the drainage of the water layer above the partition 8.

[0022] The usage instructions for this product are as follows: Figures 1 to 3 As shown, it includes the following steps:

[0023] S1. The cooling water delivery pipe 3 receives cooling water and delivers it to the first packing layer 2 through the nozzle 7 on the cooling water delivery pipe 3. The chilled water delivery pipe 5 receives chilled water and delivers it to the second packing layer 4 through the nozzle 7 on the chilled water delivery pipe 5. The chilled water continues to flow downward through the second packing layer 4 and is then delivered to the first packing layer 2. The cooling water delivered to the first packing layer 2 through the nozzle 7 on the cooling water delivery pipe 3 merges to form a first descending liquid flow. The first descending liquid flow continues to flow downward through the first packing layer 2 and eventually accumulates at the bottom of the tower body 1, forming a liquid layer to be returned. The liquid layer to be returned is then transported to the circulating water recovery system through the return water pipe at the bottom of the tower body 1. When the time for the nozzle 7 on the cooling water delivery pipe 3 to reach the first packing layer 2 and the time for the chilled water to reach the second packing layer 4 through the nozzle 7 on the chilled water delivery pipe 5 have both reached the preset time, the first packing layer 2 and the second packing layer 4 have both reached the preset temperature range, and the liquid layer to be returned has also reached the preset height, then compressed air can be received.

[0024] S2. Compressed air, pressurized by a self-cleaning air filter and the main air compressor, enters the tower body 1 through the inlet pipe and forms an upward airflow. This upward airflow first passes through the first packing layer 2 and the first downward liquid flow continuously supplied to the first packing layer 2 for counter-current heat exchange, achieving a first cooling. After the first cooling, the upward airflow is continuously supplied to the second packing layer 4 and the chilled water continuously supplied to the second packing layer 4 for counter-current heat exchange, achieving a second cooling. After the second cooling, the rising airflow continues upward, but is blocked by baffle 8 and divided into two parts: a first part of compressed air and a second part of compressed air. The first part of compressed air is delivered through the first elbow 10 to the inner cavity of the tower body 1 between the baffle 8 and the wire mesh coalescer 6, and then directly impacts the inner wall of the tower body 1, thus using the shape of the inner wall of the tower body 1 to guide and form a first rotating wind. The second part of compressed air is delivered through the second elbow 11 to the inner cavity of the tower body 1 between the baffle 8 and the wire mesh coalescer 6, and then directly impacts the inner wall of the tower body 1, thus using the shape of the inner wall of the tower body 1 to guide and form a second rotating wind. Then, the second rotating wind and the first rotating wind continuously supply the first part of compressed air to the first elbow 10 and the second part of compressed air to the second elbow 11. Driven by the air, a spiral upward airflow is formed. During the upward movement of the spiral upward airflow, the water in the spiral upward airflow is continuously separated to achieve the first gas-liquid separation. The liquid phase after the first gas-liquid separation flows down along the tower body 1 between the partition 8 and the wire mesh coalescer 6 to form a second descending liquid flow and accumulates in the inner cavity of the tower body 1 between the partition 8 and the wire mesh coalescer 6 to form a liquid layer to be descended. The liquid in the descending liquid layer is divided into two parts, namely the third descending liquid flow and the fourth descending liquid flow. The third descending liquid flow is transported to the second packing layer 4 through the tear hole 19 and merged into the chilled water delivered to the second packing layer 4 by the nozzle 7 on the chilled water delivery pipe 5. The fourth descending liquid flow is transported to the liquid layer to be returned through the return liquid delivery pipe 17. The gas phase after the first gas-liquid separation is still spirally ascended and transported to the wire mesh coalescer 6 for a second gas-liquid separation. The gas phase after the second gas-liquid separation is transported to the downstream purification system through the gas outlet pipe of the tower body 1. The gas phase after the second gas-liquid separation descends along the tower body 1 between the partition 8 and the wire mesh coalescer 6 and merges into the second descending liquid flow.

[0025] In this embodiment, the first elbow 10 and the second elbow 11 guide the compressed air to form a spiral upward airflow, achieving preliminary separation of moisture carried in the compressed air. Furthermore, the compressed air, guided by the first elbow 10 and the second elbow 11, impacts the inner wall of the tower body 1, consuming some kinetic energy and reducing the direct impact on the wire mesh coalescer 6. Compared to existing technologies that use a hydrocyclone separator for preliminary gas-liquid separation, this product's structure, using the first elbow 10 and the second elbow 11 to guide the compressed air to form a spiral upward airflow, is simpler. Simultaneously, because the compressed air delivered by the first elbow 10 and the second elbow 11 is directly delivered to the inner wall of the tower body 1, consuming some kinetic energy, the technical problem of excessive moisture in the compressed air delivered outward from the tower body 1 caused by the increased compressed air flow directly impacting the wire mesh coalescer 6 and resulting in partial puncture of the wire mesh coalescer 6 is reduced.

[0026] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. An air-cooled tower, characterized in that: The tower body (1) includes, from bottom to top, a first packing layer (2), a cooling water conveying pipe (3), a second packing layer (4), a chilled water conveying pipe (5), and a wire mesh coalescer (6). A nozzle (7) is provided on the side of the cooling water conveying pipe (3) facing the first packing layer (2) and on the side of the chilled water conveying pipe (5) facing the second packing layer (4). A partition (8) is provided between the chilled water conveying pipe (5) and the wire mesh coalescer (6). The column body (1) of the coalescing device (6) is provided with a return pipe (9), and the partition plate (8) is provided with a first elbow (10) and a second elbow (11). The angle between the central axis of the outlet end of the first elbow (10) and the central axis of the column body (1) and the angle between the central axis of the outlet end of the second elbow (11) and the central axis of the column body (1) are both 80 degrees to 90 degrees. The angle between the central axis of the outlet end of the first elbow (10) and the central axis of the outlet end of the second elbow (11) is 150 degrees to 210 degrees.

2. The air-cooled tower according to claim 1, characterized in that: A support plate (12) is provided inside the tower body (1) between the partition plate (8) and the chilled water delivery pipe (5). The number of support plates (12) is several. The support plates (12) are evenly distributed in a star shape around the central axis of the tower body (1) on the inner wall of the tower body (1). A first guide ring (13) is provided on the support plates (12). A second guide ring (14) is provided on the top of the first guide ring (13). The partition plate (8) is installed on the top of the inner cavity of the second guide ring (14). The first guide ring (13) and the second guide ring (14) are both ring structures. The diameter of the outer circle of the first guide ring (13) and the diameter of the inner circle at the bottom of the second guide ring (14) gradually increase along the direction from near the support plate (12) to far away from the support plate (12).

3. The air-cooled tower according to claim 2, characterized in that: Each of the support plates (12) includes a longitudinal plate and a transverse plate at the top of the longitudinal plate. Each support plate (12) and the first guide ring (13) are respectively provided with a first fixing bolt (15), and each support plate (12) and the second guide ring (14) are respectively provided with a second fixing bolt (16). The number of support plates (12) is at least three.

4. The air-cooled tower according to claim 1, characterized in that: The return liquid pipe (9) and the tower body (1) below the first packing layer (2) are connected by a return liquid delivery pipe (17), and a liquid level sensor (18) is installed on the tower body (1) below the first packing layer (2).

5. The air-cooled tower according to claim 1, characterized in that: The angle between the central axis of the first bend (10) outlet end and the central axis of the tower body (1) and the angle between the central axis of the second bend (11) outlet end and the central axis of the tower body (1) are both 90 degrees, and the central axis of the first bend (10) outlet end and the central axis of the second bend (11) outlet end are 180 degrees.

6. The air-cooled tower according to claim 1, characterized in that: The partition (8) is provided with tear ducts (19).

Images