A heat exchanger

Abstract

The application relates to the field of heat exchangers, in particular to a heat exchanger which comprises a vertical cylindrical shell and an inner shell coaxially arranged in the shell, a plurality of annular baffles are fixedly connected between the shell and the inner shell; a plurality of groups of heat exchange pipes are arranged in the inner shell, each group of heat exchange pipes comprises a plurality of material pipes arranged in an up-and-down staggered mode, each material pipe comprises a feeding part, a heat exchange part and a discharging part, each feeding part and discharging part penetrates the baffle device, the discharging part of the upper material pipe is communicated with the feeding part of the lower material pipe, and each heat exchange part is arranged in a serpentine mode in the inner shell; in the application, the heat exchange part of the heat exchange pipe is arranged in a serpentine mode in the inner shell, the flow path of the high-temperature product is prolonged, the heat exchange area of the cooling water and the heat exchange pipe is increased, the heat exchange time is prolonged, the flow speed of the high-temperature product in the heat exchange pipe is increased, the large heat exchange area can effectively cool the high-temperature product, and the cooling efficiency of the high-temperature product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat exchangers, in particular to a heat exchanger. BACKGROUND

[0002] The heat exchanger is a device widely used in industrial production, which is used to realize heat exchange between two or more fluids. It plays an important role in many fields such as petroleum chemical industry, energy, food, pharmaceuticals, etc.; among them, in the field of petroleum chemical industry, the heat exchanger is an essential device in the production process. Many products are high in temperature after production and need to be cooled. The heat exchanger can cool these high-temperature products to the appropriate temperature, which is convenient for subsequent storage, transportation or further processing. For example, in the production of aromatic hydrocarbons, the product temperature is high during the reforming and separation process, and needs to be cooled to ensure product quality and subsequent processing. The cooling requirement is to cool the aromatic hydrocarbon product to 40-60℃ for subsequent storage and transportation.

[0003] In the field of petroleum chemical industry, the tube array heat exchanger is the most commonly used heat exchanger. Due to the design of the structure, the heat exchange area of the current shell-and-tube heat exchanger is small. In order to ensure that the temperature of the high-temperature product can be effectively reduced to the expected temperature, the usual treatment method is to control the speed of the medium, that is, to reduce the flow rate of the high-temperature product and to increase the flow rate of the cold medium, so as to fully realize the heat exchange between the high-temperature product and the cold medium. However, this speed control method reduces the flow rate of the high-temperature product, which leads to low cooling efficiency of the entire high-temperature product, which has an adverse effect on the subsequent processing and production links of the high-temperature product.

[0004] Therefore, a heat exchanger is proposed to solve the above problems. SUMMARY

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background art.

[0006] The technical scheme adopted by the present application to solve its technical problems is: the heat exchanger comprises a vertical cylindrical shell and an inner shell coaxially arranged inside the shell, and a plurality of annular partitions are fixedly connected between the shell and the inner shell;

[0007] A plurality of groups of heat exchange pipes are arranged in the inner shell, each group of heat exchange pipes comprises a plurality of material pipes arranged in an up-down staggered manner, each material pipe comprises a feeding portion, a heat exchange portion and a discharging portion, each feeding portion and discharging portion penetrates the partition, the discharging portion of the upper material pipe is communicated with the feeding portion of the lower material pipe, and each heat exchange portion is arranged in a serpentine shape inside the inner shell;

[0008] The inner shell has a drain end at the upper end and a water inlet end at the lower end; both the upper and lower ends of the outer shell have end caps, the feed and drain ends of a set of heat exchange tubes at the top of the inner shell pass upward through the upper end cap, and the discharge and water inlet ends of a set of heat exchange tubes at the bottom of the inner shell pass downward through the lower end cap.

[0009] Preferably, side holes are provided on the outer rings of both the water inlet and the drain outlet; multiple overflow holes are provided on the partition plate, the overflow holes are coaxially arranged with the feed section, and the inner ring of the overflow hole is clearance-fitted with the outer ring of the feed section.

[0010] Preferably, the inner shell sidewall is provided with a plurality of hollow tubes, the hollow tubes are arranged along the length of the inner shell, the hollow tubes are arranged to coincide with the penetration position of the inner shell and the material tube, and an adjustment rod is provided inside the hollow tube;

[0011] Each of the aforementioned adjusting rods includes threaded portions at its upper and lower ends and multiple adjusting portions in the middle region. The threaded portions are threadedly connected to the end cap. Each adjusting portion is located at the point where the inner shell and the material pipe pass through, and each adjusting portion is reduced in diameter.

[0012] Preferably, each of the adjusting rods has an air passage along its internal length axis, and each adjusting part has an annular groove at its upper and lower positions. Each groove contains a hollow sealing ring that connects to the air passage. Each adjusting rod has an air injection pipe at its upper end that connects to the air passage.

[0013] Preferably, a main pipe is provided vertically on the side wall of the outer shell, and a plurality of branch pipes are provided on the main pipe, each corresponding to a group of heat exchange tubes. Each branch pipe is provided with a valve, and the end of each branch pipe extends into the inner shell.

[0014] Preferably, each of the branch pipes has a hollow ring at its end, with the outer ring fixed to the inner shell sidewall and multiple drainage holes opened in the inner ring.

[0015] Preferably, the water spray direction of two adjacent drainage holes on the inner ring of each ring is inclined vertically.

[0016] Preferably, each of the side holes is connected to a side tube, with the end sealing cover of the upper side tube covering the overflow hole on the top partition, and the end sealing cover of the lower side tube covering the overflow hole on the bottom partition.

[0017] Preferably, each of the adjusting rods includes driving ends at its upper and lower ends, and multiple flow control parts in the middle region, each flow control part being arranged in a flat shape.

[0018] Preferably, each of the drive ends has an indicator arrow on its end face.

[0019] The advantages of this invention are:

[0020] 1. In this invention, the heat exchange section of the heat exchange tube is designed to be bent in a snake shape inside the inner shell, which extends the flow path of the high-temperature product and increases the heat exchange zone between the cooling water and the heat exchange tube, thus extending the heat exchange time. Even if the flow rate of the high-temperature product inside the heat exchange tube is increased, the larger heat exchange zone can still effectively cool the high-temperature product, thereby improving the cooling efficiency of the high-temperature product.

[0021] 2. In this invention, the adjusting rod is used to adjust the cross-sectional size of the high-temperature product in the material tube, thereby controlling the flow rate of the high-temperature product in the material tube per unit time, facilitating the flow control of the high-temperature product, and thus ensuring that the high-temperature product is effectively cooled. Attached Figure Description

[0022] Figure 1 This is a perspective view of the heat exchanger in this invention;

[0023] Figure 2 This is a front view of the heat exchanger in this invention;

[0024] Figure 3 This is a perspective view of the fit between the partition and the inner shell in this invention;

[0025] Figure 4 This is a schematic diagram of the mating structure between the heat exchange tube and the inner shell in this invention;

[0026] Figure 5 This is a three-dimensional schematic diagram of the interconnected upper and lower multi-layer material pipes in this invention;

[0027] Figure 6 This is a schematic front view illustrating the interconnection of multiple material pipes in the present invention.

[0028] Figure 7 This is a schematic diagram showing the connection between the feeding section and the discharging section in this invention;

[0029] Figure 8 This is a cross-sectional view of the inner shell in this invention;

[0030] Figure 9 This is a perspective view of the adjusting rod in this invention;

[0031] Figure 10 This is a schematic diagram of the cooperation structure between the adjusting part and the material pipe in this invention;

[0032] Figure 11 This is a three-dimensional view of the ring body in this invention;

[0033] Figure 12 This is a schematic diagram of the flow control section in this invention.

[0034] In the diagram: 1. Outer shell; 2. Inner shell; 3. Baffle plate; 4. Heat exchange tube; 5. Material tube; 6. Feed section; 7. Heat exchange section; 8. Discharge section; 9. Drain end; 10. Water inlet end; 11. End cap; 12. Overflow hole; 13. Sleeve; 14. Hollow tube; 15. Adjusting rod; 16. Threaded part; 17. Adjusting part; 18. Rotating part; 19. Sealing ring; 20. Air injection pipe; 21. Main pipe; 22. Branch pipe; 23. Ring body; 24. Drain hole; 25. Side pipe; 26. Drive end; 27. Flow control part; 28. Indicating arrow. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example

[0036] Reference Figures 1-8 A heat exchanger includes a vertical cylindrical outer shell 1 and an inner shell 2 arranged coaxially inside it, with a plurality of annular baffles 3 fixedly connected between the outer shell 1 and the inner shell 2.

[0037] The inner shell 2 is provided with multiple sets of heat exchange tubes 4. Each set of heat exchange tubes 4 includes multiple material tubes 5 arranged vertically and horizontally. Each material tube 5 includes a feed section 6, a heat exchange section 7 and a discharge section 8. Each feed section 6 and discharge section 8 are arranged through the partition 3. The discharge section 8 of the upper material tube 5 is connected to the feed section 6 of the lower material tube 5. Each heat exchange section 7 is arranged in a snake shape inside the inner shell 2.

[0038] The inner shell 2 is provided with a drain end 9 at the upper end and a water inlet end 10 at the lower end; both the upper and lower ends of the outer shell 1 are provided with end caps 11, the feed part 6 and drain end 9 of a set of heat exchange tubes 4 at the top of the inner shell 2 pass through the upper end cap 11 upwards, and the discharge part 8 and water inlet end 10 of a set of heat exchange tubes 4 at the bottom of the inner shell 2 pass through the lower end cap 11 downwards.

[0039] In this embodiment, the overall heat exchanger is installed vertically on the ground. The internal partition 3 is used to fix the outer shell 1 and the inner shell 2 together coaxially. The water inlet 10 at the bottom is connected to an external water pump. The water pump can inject external cooling water into the inner shell 2, which flows upward along the inner shell 2 and flows out from the outlet.

[0040] The inner shell 2 contains multiple sets of heat exchange tubes 4 arranged vertically. Each set of heat exchange tubes 4 consists of multiple material tubes 5, which are arranged vertically within each set. Material tubes 5 in the same location within each set of heat exchange tubes 4 are interconnected. For example, the material tubes 5 at the top of each set of heat exchange tubes 4 are interconnected end to end. That is, in two adjacent sets of material tubes 5, the outlet 8 of the upper material tube 5 is connected to the inlet 6 of the lower material tube 5, forming a structure as follows: Figure 5 andFigure 6 The structure shown;

[0041] The specific working process of the heat exchanger is as follows: the high-temperature product is injected from a set of heat exchange tubes 4 at the top of the inner shell 2. The high-temperature product is divided into multiple streams and flows into the material tube 5. At the same time, external cooling water is injected into the inner shell 2 through a water pump. The cooling water covers the heat exchange section 7 of the material tube 5. The high-temperature product flows inside the heat exchange section 7. The heat of the high-temperature product is transferred to the heat exchange section 7. The cooling water exchanges heat with the heat exchange section 7 and carries away the heat of the high-temperature product, and is discharged from the drain end 9.

[0042] The heat exchange section 7 of the heat exchange tube 4 is arranged in a snake-shaped bend inside the inner shell 2, which extends the flow path of the high-temperature product and also increases the heat exchange zone between the cooling water and the heat exchange tube 4, thus extending the heat exchange time. Even if the flow rate of the high-temperature product inside the heat exchange tube 4 is increased, the larger heat exchange zone can still effectively cool the high-temperature product, thereby improving the cooling efficiency of the high-temperature product. Compared with the existing shell and tube heat exchangers, the cooling efficiency of the high-temperature product is improved without increasing the overall volume of the heat exchanger.

[0043] Reference Figures 1-8 The water inlet end 10 and the drain end 9 are both provided with side holes on their outer rings; the partition plate 3 is provided with multiple overflow holes 12, the overflow holes 12 are coaxially arranged with the feed section 6, and the inner ring of the overflow hole 12 is fitted with the outer ring of the feed section 6 with a clearance.

[0044] The partition 3 is used to support and fix the inner shell 2 inside the outer shell 1. Meanwhile, the feed section 6 and discharge section 8 of the material pipe 5 extend outside the inner shell 2, facilitating the connection and installation of the feed section 6 and discharge section 8. Figure 7 As shown, the feed section 6 and the discharge section 8 can be sealed and connected by using the sleeve 13. When the material pipe 5 is inspected and unclogged in the future, the sleeve 13 can be moved up and down to unclog the inside of the material pipe 5.

[0045] The feeding section 6 and the discharging section 8 are located between the inner shell 2 and the outer shell 1. Since some material pipes 5 cannot contact the cooling water, an overflow hole 12 is provided on the partition 3. The overflow hole 12, in conjunction with the side hole, guides the cooling water into the cavity between the inner shell 2 and the outer shell 1. Specifically, most of the cooling water enters the inner shell 2 from the water inlet 10 and exchanges heat with the heat exchange section 7. A small amount of cooling water flows from the side hole of the water inlet 10 into the space between the inner shell 2 and the outer shell 1, and then flows upwards layer by layer along the overflow hole 12. As the cooling water flows upward layer by layer, it comes into contact with the feed section 6 and the discharge section 8, and exchanges heat with the feed section 6 and the discharge section 8, further improving the heat exchange efficiency of the heat exchanger. The cooling water flows upward layer by layer along the overflow hole 12 and flows into the side hole of the drain end 9, and finally flows out from the drain pipe. Alternatively, a side pipe 25 connected to the side hole of the drain end 9 can be set separately. The side pipe 25 can drain the cooling water in the cavity separately, so that there is a stable flow of cooling water in the cavity.

[0046] Reference Figures 1-10 The inner shell 2 has a plurality of hollow tubes 14 on its side wall. The hollow tubes 14 are arranged along the length of the inner shell 2. The hollow tubes 14 are arranged to coincide with the penetration positions of the inner shell 2 and the material tube 5. An adjusting rod 15 is provided inside the hollow tube 14.

[0047] Each of the adjusting rods 15 includes a threaded portion 16 at its upper and lower ends and a plurality of adjusting portions 17 in the middle area. The threaded portion 16 is threadedly connected to the end cap 11. Each adjusting portion 17 is located at the through-hole position of the inner shell 2 and the material pipe 5, and each adjusting portion 17 is reduced in diameter.

[0048] The regulating rod 15 is used to adjust the cross-sectional area of ​​the high-temperature product in the material pipe 5, thereby controlling the flow rate of the high-temperature product in the material pipe 5 per unit time and ensuring effective cooling of the high-temperature product. The specific operation of the regulating rod 15 is as follows: the two ends of the regulating rod 15 pass through the upper and lower end caps 11 respectively, and the threaded part 16 of the regulating rod 15 is threaded to the end cap 11. A rotating part 18 is provided at the end of the regulating rod 15 to facilitate the rotation of the regulating rod 15. The regulating rod 15 is driven to rotate using a wrench. While rotating, the regulating rod 15 moves axially. When the regulating rod 15 moves upward as a whole, the bottom of the regulating part 17 of the regulating rod 15 gradually blocks the material pipe 5, which can reduce the flow rate of the high-temperature product in the material pipe 5 per unit time. When the regulating rod 15 moves downward as a whole, the regulating part 17 of the regulating rod 15 gradually moves down and exposes the flow space of the high-temperature product, which can increase the flow rate of the high-temperature product in the material pipe 5 per unit time, which facilitates the flow control of the high-temperature product and ensures effective cooling of the high-temperature product.

[0049] Reference Figure 9 and Figure 10Each of the adjusting rods 15 has an air passage along its internal length axis, and each adjusting part 17 has an annular groove at its upper and lower positions. Each groove has a hollow sealing ring 19 connected to the air passage. Each adjusting rod 15 has an air injection pipe 20 at its upper end, which is connected to the air passage.

[0050] The hollow tube 14 and adjusting rod 15 are quite long. During the installation of the adjusting rod 15 inside the hollow tube 14, it is necessary to consider both the assembly and disassembly of the adjusting rod 15 and the hollow tube 14, as well as the sealing performance between them. Specifically, this involves the sealing performance between the upper and lower outer rings of the adjusting part 17 and the hollow tube 14 of the material pipe 5, to prevent high-temperature medium from overflowing into the hollow tube 14 and causing leakage of the high-temperature product. Therefore, a deformable sealing ring 19 is provided on the adjusting rod 15. During the assembly of the adjusting rod 15 into the hollow tube 14, the sealing ring 19 is not injected with gas. At this time, the adjusting rod 15 can be smoothly assembled into the hollow tube 14. After the adjusting rod 15 is assembled to the designated position, gas is injected into the gas injection pipe 20. The gas flows along the gas passage and is injected into the sealing ring 19. The sealing ring 19 expands and presses against the inner wall of the hollow tube 14, sealing the gap between the adjusting part 17 and the hollow tube 14, reducing the possibility of high-temperature medium leakage.

[0051] Reference Figures 1-4 The outer shell 1 has a main pipe 21 vertically arranged on its side wall. The main pipe 21 has a plurality of branch pipes 22 corresponding to each group of heat exchange tubes 4. Each branch pipe 22 is equipped with a valve, and the end of each branch pipe 22 extends into the inner shell 2.

[0052] The heat exchanger is equipped with multiple branch pipes 22, which work in conjunction with the water inlet 10 to compensate for situations where the water flow rate at the water inlet 10 cannot effectively cool the high-temperature product in a timely manner. For example, when the temperature of the high-temperature product is unstable, fluctuating between high and low, or when the flow rate of the high-temperature product fluctuates between high and low, cooling water can be injected into the branch pipes 22 to cool the high-temperature product. Specifically, the main pipe 21 is connected to an external liquid pump, which is in standby mode. When the thermometer detects that the temperature of the high-temperature product entering the heat exchange tube 4 is high, the liquid pump is driven, and the liquid pump injects cooling water into the main pipe 21, which then flows along the multiple branch pipes 22 and is injected into the inner shell 2. Alternatively, when the flow meter detects that the flow rate of the high-temperature product increases, the liquid pump is driven, and the cooling water is injected into the inner shell 2 from the branch pipes 22, thereby ensuring effective cooling of the high-temperature product.

[0053] Reference Figure 2 , Figure 3 , Figure 8 and Figure 11 Each branch pipe 22 has a hollow ring 23 at its end. The outer ring of the ring 23 is fixed to the side wall of the inner shell 2, and multiple drainage holes 24 are opened in the inner ring of the ring 23.

[0054] An annular body 23 is installed inside the inner tube, and multiple drain holes 24 are provided on the annular body 23. When cooling water is injected into the annular body 23 from the branch pipe 22, the cooling water is discharged into the inner tube from the multiple drain holes 24, so that the cooling water injected into the inner tube can be quickly dispersed and mixed with the cooling water that is undergoing heat exchange in the inner tube, so that the large volume of cooling water undergoing heat exchange can be cooled down quickly, thereby effectively exchanging heat in the heat exchange section 7.

[0055] Reference Figure 11 The two adjacent drainage holes 24 on the inner ring of each ring body 23 are arranged at an upward and downward angle in the direction of water spraying;

[0056] The inclined setting of the water spray direction of the drain hole 24 allows the cooling water injected into the inner pipe from the branch pipe 22 to be dispersed between the upper and lower material pipes 5 and mixed with a larger amount of cooling water that is undergoing heat exchange, thereby improving the uniformity of cooling of the cooling water undergoing heat exchange and ensuring stable heat exchange between the heat exchange section 7 and the cooling water, thereby improving the consistency of cooling of high-temperature products.

[0057] Reference Figure 3 and Figure 4 Each of the side holes is connected to a side tube 25, the end sealing cover of the upper side tube 25 covers the overflow hole 12 on the top partition 3, and the end sealing cover of the lower side tube 25 covers the overflow hole 12 on the bottom partition 3.

[0058] The side pipe 25 is used to directly connect the side hole and the overflow hole 12, avoiding the upper and lower ports of the hollow pipe 14, so as to prevent cooling water from entering from the upper and lower ports of the hollow pipe 14 and overflowing into the material pipe 5, thus contaminating the high-temperature products. Example

[0059] Reference Figure 12 In another embodiment of the present invention, each of the adjusting rods 15 includes driving ends 26 at its upper and lower ends, and a plurality of flow control parts 27 in the middle region, each flow control part 27 being arranged in a flat shape.

[0060] In this second embodiment, the adjusting rod 15 is also used to adjust the flow cross-sectional size of the high-temperature product in the material pipe 5. Specifically, the adjusting rod 15 is operated by engaging the wrench with the drive end 26 and rotating the adjusting rod 15. At this time, the adjusting rod 15 rotates inside the hollow pipe 14 without moving up or down along its axis. Meanwhile, the flow control part 27 is positioned at different tilt angles relative to the flow cross-section of the high-temperature product to control the unit flow rate. Compared to the adjusting part 17 with a reduced diameter in the first embodiment, this flow control part 27 is flat and has a wider range for adjusting the unit flow rate.

[0061] Reference Figure 12 Each of the drive ends 26 has an indicator arrow 28 on its end face;

[0062] In this second embodiment, the end of the adjusting rod 15 is provided with an indicator arrow 28. When the indicator arrow 28 points to the axis of the water inlet 10, it means that the surface of the flow control part 27 on the adjusting rod 15 is on the same plane as the axis of the water inlet 10. At this time, the flow cross-section of the high-temperature product is at its maximum.

[0063] Working principle: The high-temperature product is injected into a set of heat exchange tubes 4 at the top of the inner shell 2. The high-temperature product is divided into multiple streams and flows into the material tube 5. At the same time, external cooling water is injected into the inner shell 2 through a water pump. The cooling water covers the heat exchange section 7 of the material tube 5. The high-temperature product flows inside the heat exchange section 7. The heat of the high-temperature product is transferred to the heat exchange section 7. The cooling water exchanges heat with the heat exchange section 7 and carries away the heat of the high-temperature product, which is then discharged from the drain end 9.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat exchanger, characterized in that: It includes a vertical cylindrical outer shell and an inner shell arranged coaxially inside it, with multiple ring-shaped partitions fixed between the outer shell and the inner shell; The inner shell is provided with multiple sets of heat exchange tubes. Each set of heat exchange tubes includes multiple material tubes arranged vertically and horizontally. Each material tube includes a feeding section, a heat exchange section and a discharging section. Each feeding section and discharging section are arranged through a partition. The discharging section of the upper material tube is connected to the feeding section of the lower material tube. Each heat exchange section is arranged in a snake shape inside the inner shell. The inner shell has a drain end at the upper end and a water inlet end at the lower end; the outer shell has end caps at both the upper and lower ends; the feed and drain ends of a set of heat exchange tubes at the top of the inner shell pass through the upper end cap upwards; and the discharge and water inlet ends of a set of heat exchange tubes at the bottom of the inner shell pass through the lower end cap downwards. Side holes are provided on the outer rings of both the water inlet and the drain outlet; multiple overflow holes are provided on the partition plate, the overflow holes are coaxially arranged with the feed section, and the inner ring of the overflow hole is fitted with the outer ring of the feed section with a clearance.

2. A heat exchanger according to claim 1, characterized in that: The inner shell sidewall is provided with a plurality of hollow tubes, which are arranged along the length of the inner shell. The hollow tubes are arranged to coincide with the penetration positions of the inner shell and the material tube. An adjustment rod is provided inside the hollow tube. Each of the aforementioned adjusting rods includes threaded portions at its upper and lower ends and multiple adjusting portions in the middle region. The threaded portions are threadedly connected to the end cap. Each adjusting portion is located at the point where the inner shell and the material pipe pass through, and each adjusting portion is reduced in diameter.

3. A heat exchanger according to claim 2, characterized in that: Each of the adjusting rods has an air passage along its internal length axis, and each adjusting part has an annular groove at its upper and lower positions. Each groove contains a hollow sealing ring that connects to the air passage. Each adjusting rod has an air injection pipe at its upper end that connects to the air passage.

4. A heat exchanger according to claim 1, characterized in that: The outer shell has a main pipe vertically arranged on its side wall. The main pipe has multiple branch pipes that correspond to each group of heat exchange tubes. Each branch pipe has a valve, and the end of each branch pipe extends into the inner shell.

5. A heat exchanger according to claim 4, characterized in that: Each branch pipe has a hollow ring at its end, with the outer ring fixed to the inner shell sidewall and multiple drainage holes opened in the inner ring.

6. A heat exchanger according to claim 5, characterized in that: The water spray direction of two adjacent drainage holes on the inner ring of each ring is inclined vertically.

7. A heat exchanger according to claim 1, characterized in that: Each of the side holes is connected to a side tube, with the end sealing cover of the upper side tube covering the overflow hole on the top partition, and the end sealing cover of the lower side tube covering the overflow hole on the bottom partition.

8. A heat exchanger according to claim 3, characterized in that: Each of the regulating rods includes drive ends at its upper and lower ends, and multiple flow control parts in the middle region, each flow control part being arranged in a flat shape.

9. A heat exchanger according to claim 8, characterized in that: Each of the drive ends has an indicator arrow on its end face.

Images