Heat medium water heat exchanger

Abstract

The application discloses a heat medium water heat exchanger and belongs to the technical field of heat energy exchange equipment. The heat medium water heat exchanger comprises a heat exchange mechanism. Cold water enters from a cold water inlet, passes through a filter groove for removing impurities, enters clean heat exchange pipe groups and is heated, and finally flows out from a cold water outlet. Heat medium is added into the inside of a shell through a heat medium inlet, is guided by alternately arranged single-circle-void baffle plates and double-circle-void baffle plates, forms three-dimensional spiral flow, efficiently transfers heat to the cold water in the pipe through the pipe wall of the heat exchange pipe groups, and rotates a connecting shaft driven by a servo motor. Dirt adhered to the surface of the filter groove is scraped off by a cleaning brush. By opening a blowdown valve for several seconds, dirt accumulated at the bottom of the pipe box can be rapidly discharged from the system together with part of the water flow through a slag discharge port, and the whole online cleaning process is completed. The heat exchanger can filter the impurities in the water body, thereby reducing the generation of scale, improving the heat exchange efficiency, and being simple, quick and convenient to operate and use.

Description

Technical Field

[0001] This application relates to the technical field of heat exchange equipment, specifically to heat transfer medium water heat exchangers. Background Technology

[0002] In industrial production, water heat exchangers are common heat exchange equipment. Water heat exchangers face the challenges of scaling and efficiency degradation. However, in many practical applications (such as centralized heating and industrial circulating water systems), the circulating water or makeup water often contains solid impurities such as silt, rust, and scale fragments. These impurities exacerbate clogging and wear of the heat exchanger: Direct clogging: Impurities enter the narrow heat exchange tubes with the water flow, directly causing physical blockage, leading to reduced flow and heat exchange failure. Increased scaling: Solid particles become crystal nuclei, accelerating scale precipitation and adhesion. Wear and damage: High-speed flowing particles cause erosion and wear on the heat exchange tube walls, especially reinforced structures such as corrugated tubes or fins. Current technology often installs external filters at the heat exchanger inlet, but these filters require shutdown and disassembly for cleaning, affecting continuous system operation and being cumbersome. Some designs attempt to integrate filters inside the heat exchanger, but often lack effective online cleaning methods or are incompletely cleaned, failing to fundamentally solve the efficiency degradation problem caused by impurity accumulation.

[0003] Therefore, this application provides a heat exchanger for heat transfer medium to solve the above problems. Utility Model Content

[0004] This application provides a heat exchanger for heat transfer medium, which aims to solve the problem mentioned in the background art that the circulating water or makeup water of existing heat transfer medium heat exchangers often contains solid impurities such as silt, rust, and scale fragments. These impurities will aggravate the clogging and wear of the heat exchanger and cause inconvenience in use.

[0005] To achieve the above objectives, this application provides the following technical solution: a heat transfer medium water heat exchanger, wherein the heat transfer medium water heat exchanger includes a heat exchange mechanism;

[0006] Existing heat exchangers often contain solid impurities such as silt, rust, and scale fragments in their circulating or makeup water. These impurities exacerbate clogging and wear, leading to inconvenience. The heat exchange mechanism includes a shell with externally fixed support bases at both ends. Tube boxes are fixedly connected to both ends of the shell via flanges. Tube sheets are fixedly connected to both ends of the shell's interior, with heat exchange tube groups arranged between two sets of tube sheets. Multiple sets of single-segment and double-segment baffles are installed inside the shell. A cold water inlet is located at the top of one set of tube boxes, and a cold water outlet is located at the bottom of the other set. A heat medium inlet is located at the top of the shell, and a heat medium outlet is located at the bottom. A filter assembly is installed inside the tube boxes, positioned at the bottom of the cold water inlet. Cold water enters from the cold water inlet, passes through a filter tank to remove impurities, and then enters a clean water tank. The heat exchanger tubes are heated and then flow out from the cold water outlet. The heat medium is added to the interior of the shell through the heat medium inlet. Guided by alternating vertically arranged single and double segmental baffles, a three-dimensional spiral flow is formed, which efficiently transfers heat through the tube walls to the cold water in the tube side. After a period of operation, impurities will accumulate on the outer surface of the filter tank. While the equipment is running, the operator can rotate the connecting shaft via a servo motor. The connecting shaft drives the cleaning brush to rotate outside the filter tank. The cleaning brush will scrape off the dirt attached to the surface of the filter tank. The scraped dirt falls to the bottom of the tube box under gravity. By opening the drain valve for a few seconds, the dirt accumulated at the bottom of the tube box can be quickly discharged from the system with some water flow through the slag discharge port, completing the entire online cleaning process. This can filter impurities inside the water, thereby reducing scale formation, improving heat exchange efficiency, and is simple, quick, and convenient to operate.

[0007] Preferably, to address the issue of low heat exchange efficiency, multiple sets of single-segment and double-segment baffles are arranged in a cross configuration, with equal spacing between them. The diameter of the tube sheet is equal to the diameter of the internal openings in the single-segment and double-segment baffles. This cross configuration of the single-segment and double-segment baffles can alter the flow direction of the heat medium, thereby improving heat exchange efficiency.

[0008] Preferably, to address the issue of convenient cleaning of impurities, the filter assembly includes a filter tank, which is fixedly connected to the bottom of the cold water inlet via a flange. A cleaning brush is provided on the outside of the filter tank, and a connecting shaft is fixedly connected to the bottom of the cleaning brush. A servo motor is fixedly connected to the outside of the pipe box, and the output end of the servo motor extends into the inside of the pipe box and is fixedly connected to the bottom of the connecting shaft. The servo motor drives the connecting shaft to rotate, which in turn drives the cleaning brush to rotate outside the filter tank. The cleaning brush scrapes off the dirt adhering to the surface of the filter tank, thus facilitating the cleaning of impurities.

[0009] Preferably, to address the issue of ease of use, the cleaning brush has an L-shaped cross-section and is adapted to the filter tank. A sealing ring is provided between the bottom end of the connecting shaft and the tube box. The cleaning brush and the filter tank are adapted to facilitate the cleaning of impurities adsorbed on the surface of the filter tank. Furthermore, the sealing ring and the connection between the tube box and the connecting shaft are sealed to improve the sealing performance during use.

[0010] Preferably, in order to solve the problem of convenient discharge of impurities, a slag discharge port is provided at the bottom of the pipe box, and a sewage discharge valve is provided inside the slag discharge port. Through the sewage discharge valve, impurities can be conveniently discharged through the slag discharge port, which is convenient to use.

[0011] In this heat exchange mechanism, cold water enters through the cold water inlet, passes through a filter tank to remove impurities, and then enters the clean heat exchange tube assembly to be heated. Finally, it flows out from the cold water outlet. The heat medium enters the interior of the shell through the heat medium inlet and is guided by alternating vertically arranged single-segment and double-segment baffles to form a three-dimensional spiral flow. This efficiently transfers heat through the tube walls to the cold water in the tubes. After a period of operation, impurities accumulate on the outer surface of the filter tank. While the equipment is running, the operator can rotate the connecting shaft via a servo motor. The connecting shaft drives a cleaning brush to rotate outside the filter tank, scraping off the dirt adhering to the surface of the filter tank. The scraped dirt falls to the bottom of the tube box under gravity. By opening the drain valve for a few seconds, the dirt accumulated at the bottom of the tube box can be quickly discharged from the system along with some of the water flow through the slag discharge port, completing the entire online cleaning process. This can filter impurities inside the water, thereby reducing scale formation, improving heat exchange efficiency, and is simple, quick, and convenient to operate. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of a heat exchanger for heat transfer medium (water).

[0013] Figure 2 This is a three-dimensional schematic diagram of a heat exchanger for a heat transfer medium.

[0014] Figure 3 This is a schematic diagram of the main structure of a heat exchanger for heat transfer medium.

[0015] In the picture:

[0016] 1. Heat exchange mechanism; 11. Shell; 12. Support base; 13. Tube box; 14. Tube sheet; 15. Heat exchange tube assembly; 16. Single-circular-segment baffle; 17. Double-circular-segment baffle; 18. Cold water inlet; 19. Cold water outlet; 20. Heat medium inlet; 21. Heat medium outlet; 22. Filter assembly; 23. Filter tank; 24. Cleaning brush; 25. Connecting shaft; 26. Servo motor; 27. Sealing ring; 28. Slag discharge port; 29. ​​Drain valve. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Example 1

[0019] This embodiment provides a heat exchanger for a heat transfer medium, such as... Figure 1-3 As shown, the heat exchanger for the heat medium includes a heat exchange mechanism 1.

[0020] The heat exchange mechanism 1 can filter impurities inside the water, thereby reducing scale formation, improving heat exchange efficiency, and is simple, quick, and convenient to use.

[0021] Specifically, the heat exchange mechanism 1 includes a shell 11, with support seats 12 fixedly connected to both ends of the shell 11 externally, and tube boxes 13 fixedly connected to both ends of the shell 11 via flanges. Tube sheets 14 are fixedly connected to both ends of the shell 11 internally, and heat exchange tube groups 15 are arranged between the two sets of tube sheets 14. Multiple sets of single-segment baffles 16 and double-segment baffles 17 are arranged inside the shell 11. A cold water inlet 18 is arranged at the top of one set of tube boxes 13, and a cold water outlet 19 is arranged at the bottom of the other set of tube boxes 13. A heat medium inlet 20 is arranged at the top of the shell 11, and a heat medium outlet 21 is arranged at the bottom of the shell 11. A filter assembly 22 is arranged inside the tube box 13, and the filter assembly 22 is arranged at the bottom end of the cold water inlet 18.

[0022] In operation, cold water enters through the cold water inlet 18, passes through the filter tank 23 to remove impurities, and then enters the clean heat exchange tube assembly 15 to be heated. Finally, it flows out from the cold water outlet 19. The heat medium enters the interior of the shell 11 through the heat medium inlet 20 and is guided by the alternating vertically arranged single-segment baffles 16 and double-segment baffles 17 to form a three-dimensional spiral flow, efficiently transferring heat through the tube walls of the heat exchange tube assembly 15 to the tube-side cold water. After a period of operation, impurities will accumulate on the outer surface of the filter tank 23. The operator can monitor this by using the servo switch while the equipment is running. Motor 26 drives connecting shaft 25 to rotate, and connecting shaft 25 drives cleaning brush 24 to rotate outside filter tank 23. Cleaning brush 24 scrapes off the dirt attached to the surface of filter tank 23. The scraped dirt falls to the bottom of tube box 13 under gravity. By opening drain valve 29 for a few seconds, the dirt accumulated at the bottom of tube box 13 can be quickly discharged from the system with part of the water flow through slag discharge port 28, completing the entire online cleaning process. It can filter impurities inside the water, thereby reducing the formation of scale, improving heat exchange efficiency, and is simple, quick and easy to use.

[0023] The filter assembly 22 is integrated inside the tube box 13 and located directly below the cold water inlet 18, achieving "first-pass filtration" of impurities in the incoming water and preventing solid impurities from entering the heat exchange tube assembly 15 at the source. Combined with the three-dimensional spiral flow guided by the alternating vertically arranged single-segment baffles 16 and double-segment baffles 17, not only is the heat exchange efficiency significantly improved, but the resulting turbulence also effectively inhibits scale adhesion to the heat exchange tube walls. The entire online cleaning process requires no shutdown or equipment disassembly; it can be completed solely by controlling the servo motor 26 and the drain valve 29, ensuring long-term, efficient, and stable operation of the equipment and significantly reducing maintenance costs and energy consumption.

[0024] Furthermore, multiple sets of single-segment baffles 16 and double-segment baffles 17 are arranged in a crisscross pattern, with equal spacing between them. The diameter of the tube sheet 14 is equal to the diameter of the internal openings of the single-segment baffles 16 and double-segment baffles 17. This crisscross arrangement of the single-segment baffles 16 and double-segment baffles 17 can change the direction of heat transfer, thereby improving heat exchange. The notch direction of the single-segment baffle 16 is aligned with that of the adjacent double-segment baffles. The notches of the baffles 17 are perpendicular to each other. This alternating arrangement forces the shell-side heat medium to change its flow direction continuously as it flows through the baffle notches, forming an approximately three-dimensional spiral path. This flow pattern greatly enhances the fluid turbulence and disrupts the boundary layer at the tube wall, thereby significantly improving the shell-side heat transfer coefficient. The notch height of the baffles is 20% to 45% of the inner diameter of the shell 11, and the spacing between the baffles is 0.3 to 0.6 times the inner diameter of the shell 11, in order to achieve the best heat exchange and anti-fouling effect.

[0025] Furthermore, the filter assembly 22 includes a filter tank 23, which is fixedly connected to the bottom of the cold water inlet 18 via a flange. A cleaning brush 24 is provided on the outside of the filter tank 23, and a connecting shaft 25 is fixedly connected to the bottom of the cleaning brush 24. A servo motor 26 is fixedly connected to the outside of the pipe box 13, and the output end of the servo motor 26 extends into the inside of the pipe box 13 and is fixedly connected to the bottom of the connecting shaft 25. The servo motor 26 drives the connecting shaft 25 to rotate, which in turn drives the cleaning brush 24 to rotate outside the filter tank 23. The cleaning brush 24 scrapes off the dirt attached to the surface of the filter tank 23, thus facilitating the cleaning of impurities. The filter tank 23 is preferably a cylindrical body with a porous structure made of stainless steel. The mesh size can be set between 0.5mm and 2mm depending on the water quality to effectively intercept most solid impurities. The bristles of the cleaning brush 24 are made of corrosion-resistant, highly elastic engineering plastics (such as nylon or polypropylene) or stainless steel wire. Its L-shaped structure ensures that the bristles can closely fit the outer surface and bottom edge of the filter tank 23 to achieve cleaning without dead angles. The servo motor 26 is preferably a geared motor with a waterproof rating. It is controlled by a PLC controller and can be set to start automatically at regular intervals or triggered by the pressure difference signal before and after the pipe box 13. The sealing ring 27 is a mechanical seal or a high-quality nitrile rubber sealing ring to ensure that the water in the pipe box 13 will not leak during the rotation of the connecting shaft 25.

[0026] The cleaning brush 24 has an L-shaped cross-section and is compatible with the filter tank 23. A sealing ring 27 is provided between the bottom end of the connecting shaft 25 and the tube box 13. The cleaning brush 24 is compatible with the filter tank 23, which can easily clean the impurities adsorbed on the surface of the filter tank 23. The sealing ring 27 seals the connection between the tube box 13 and the connecting shaft 25, improving the sealing performance.

[0027] Specifically, the bottom of the pipe box 13 is provided with a slag discharge port 28, and a sewage discharge valve 29 is provided inside the slag discharge port 28. Through the sewage discharge valve 29, impurities can be easily discharged through the slag discharge port 28, making it convenient to use.

[0028] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A heat exchanger for heat transfer medium water, characterized in that, The heat exchanger for heat medium water includes a heat exchange mechanism (1). The heat exchange mechanism (1) includes a shell (11), with support seats (12) fixedly connected to both ends of the shell (11) externally, and tube boxes (13) fixedly connected to both ends of the shell (11) via flanges. Tube sheets (14) are fixedly connected to both ends of the shell (11), and heat exchange tube groups (15) are arranged between the two sets of tube sheets (14). Multiple sets of single-segment baffles (16) and double-segment baffles (17) are arranged inside the shell (11). A cold water inlet (18) is arranged at the top of one set of tube boxes (13), and a cold water outlet (19) is arranged at the bottom of the other set of tube boxes (13). A heat medium inlet (20) is arranged at the top of the shell (11), and a heat medium outlet (21) is arranged at the bottom of the shell (11). A filter assembly (22) is arranged inside the tube box (13), and the filter assembly (22) is arranged at the bottom end of the cold water inlet (18).

2. The heat exchanger for heat transfer medium according to claim 1, characterized in that: Multiple sets of single-segment baffles (16) and double-segment baffles (17) are arranged in a cross pattern, and the spacing between the single-segment baffles (16) and double-segment baffles (17) is equal. The diameter of the tube sheet (14) is equal to the diameter of the internal openings of the single-segment baffles (16) and double-segment baffles (17).

3. The heat exchanger for heat transfer medium according to claim 1, characterized in that: The filter assembly (22) includes a filter tank (23), which is fixedly connected to the bottom of the cold water inlet (18) via a flange. A cleaning brush (24) is provided on the outside of the filter tank (23), and a connecting shaft (25) is fixedly connected to the bottom of the cleaning brush (24). A servo motor (26) is fixedly connected to the outside of the pipe box (13), and the output end of the servo motor (26) extends into the inside of the pipe box (13) and is fixedly connected to the bottom of the connecting shaft (25).

4. The heat exchanger for heat transfer medium according to claim 3, characterized in that: The cleaning brush (24) has an L-shaped cross section and is adapted to the filter tank (23). A sealing ring (27) is provided between the bottom end of the connecting shaft (25) and the tube box (13).

5. The heat exchanger for heat transfer medium according to claim 3, characterized in that: The bottom end of the pipe box (13) is provided with a slag discharge port (28), and a sewage discharge valve (29) is provided inside the slag discharge port (28).

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