Corrosion-resistant glass-lined efficient heat exchanger

Abstract

The utility model discloses a corrosion-resistant glass lining efficient heat exchanger which comprises a barrel, two sets of installation tube plates are arranged in the barrel, the outer sides of the installation tube plates are fixedly installed through flange plates, a fixing shaft is arranged between the two sets of installation tube plates, and a fixing spiral blade is arranged between the fixing shaft and the inner side wall of the barrel in a winding mode. A plurality of heat exchange tubes are arranged in the corresponding through holes in the mounting tube plates and the fixed spiral blades, a water inlet I and a water outlet I are fixedly communicated with the upper side and the lower side of the two ends of the barrel respectively, a water inlet II and a water outlet II are fixedly communicated with the upper side and the lower side between the two groups of mounting tube plates, and a slow flow barrel is mounted in the water inlet II through a flange plate connector. The fixed spiral blade is arranged to be matched with the multiple sets of water baffles, the contact time between fluid and the heat exchange pipe can be greatly prolonged, the heat exchange efficiency is improved, the slow flow cylinder is additionally arranged in the water inlet II right facing the heat exchange pipe, the impact force of the fluid is effectively reduced, the glaze surface of the surface layer of the heat exchange pipe is prevented from being damaged, and the service life of the heat exchange pipe is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of glass-lined heat exchangers, and specifically relates to a corrosion-resistant glass-lined high-efficiency heat exchanger. Background Technology

[0002] Glass-lined heat exchangers have excellent corrosion resistance and heat transfer properties, and are therefore widely used in specific industries. However, the following technical problems exist in the use of glass-lined heat exchangers: 1) Although the vertical baffles inside the existing shell and tube heat exchangers can also play a role in obstructing and reversing the flow, the overall flow distance of the heat source is fixed, and the heat exchange efficiency is limited; 2) There is no additional baffle at the heat source inlet, which causes the incoming water to directly impact the surface of the glass-lined heat exchange tubes, and the impact is always localized, which can easily cause damage to the glaze layer on the surface of the heat exchange tubes, affecting the overall operation of the heat exchanger.

[0003] A search revealed that prior art CN218066044U discloses a shell-and-tube heat exchanger. The shell has an inlet and an outlet, the heat exchange tubes are located inside the shell, and baffles are also located inside the shell. The baffles have through holes for the heat exchange tubes to be embedded in. The inner circumference of the shell is cylindrical, and the inner wall of the shell has threaded grooves. The baffles are spiral-shaped and slide into the threaded grooves. Therefore, the through holes in the baffles allow the heat exchange tubes to be fixed, and the heat exchange tubes fixed to the baffles can be disassembled and removed from the shell as the baffles slide along the threaded grooves for easy cleaning. This solution also adds an internal filtration function to the shell, and the filter element can be replaced, enabling different levels of filtration for different fluids. However, during use, the liquid rotates and moves along the spiral baffles for heat exchange. Although the filter plates can filter impurities, they cannot change the liquid flow direction, resulting in a short residence time of the liquid between the spiral baffles and limited heat exchange efficiency.

[0004] For example, the prior art CN211977656U discloses a glass-lined tube heat exchanger. Multiple parallel PTFE baffles are arranged along the length of the heat exchanger shell cavity, with the PTFE baffles and heat exchange tubes arranged perpendicularly to each other. The multiple PTFE baffles are staggered and connected to the inner wall of the heat exchanger shell. Each PTFE baffle has multiple baffle tube holes, and each heat exchange tube passes sequentially through these holes located at the same horizontal straight line position on multiple PTFE baffles. The heat exchange tubes have a flat structure located on one side of the baffle tube holes of the PTFE baffles, and the maximum diameter of the flat structure is larger than the diameter of the baffle tube holes. This technical solution, by setting a flat structure on the glass-lined heat exchange tubes, can prevent horizontal movement of the PTFE baffles, ensuring long-term normal operation of the heat exchanger. However, it lacks a protective device at the fluid inlet, allowing the fluid to impact the glass-lined heat exchange tubes at high speed, which can easily cause localized pressure damage to the enamel surface during long-term use. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a corrosion-resistant, high-efficiency enamel-lined heat exchanger. By setting fixed spiral blades in conjunction with multiple sets of staggered baffles, the contact time between the heat source medium and the heat exchange tube can be greatly extended, thereby improving the heat exchange efficiency. Furthermore, a flow buffer is added inside the inlet II directly opposite the heat exchange tube, which effectively reduces the impact force of the heat source, prevents damage to the enamel surface of the heat exchange tube, and greatly extends the service life of the heat exchange tube.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A corrosion-resistant glass-lined high-efficiency heat exchanger includes a cylindrical body, an inlet I, an outlet I, an inlet II, an outlet II, a flow-retardant cylinder, heat exchange tubes, a fixed shaft, fixed spiral blades, and mounting tube sheets. Two sets of mounting tube sheets are installed inside the cylindrical body, and the outer sides of the mounting tube sheets are fixedly mounted via flanges. A fixed shaft is located between the two sets of mounting tube sheets, and fixed spiral blades are wound around the fixed shaft and the inner wall of the cylindrical body. Several heat exchange tubes are installed in corresponding through holes on the mounting tube sheets and the fixed spiral blades. Inlets are fixedly connected to the outer sides of the two sets of mounting tube sheets and to the upper and lower sides of both ends of the cylindrical body. The fluid to be heated is connected to the inlet I and enters the cylinder. After passing through several heat exchange tubes, it enters the other end of the cylinder and flows out at the outlet I to complete the heat exchange. The inlet II and outlet II are fixedly connected on the upper and lower sides between the two sets of mounting tube sheets of the cylinder. A flow-slowing tube is installed in the inlet II through a flange joint. The heat source fluid is connected to the inlet II. After its flow velocity is reduced by the flow-slowing tube, it enters between the two sets of mounting tube sheets of the cylinder and moves along the fixed spiral blades until it flows out at the outlet II, thus completing the heat transfer between the fluid and the several heat exchange tubes.

[0008] The slow-flow cylinder has several flow-blocking plates I, II, III, and IV installed alternately inside.

[0009] Several baffles are provided between the fixed spiral blades. A water-permeable hole is provided on one side of the baffle. The water-permeable holes on the two sets of baffles are in opposite positions, which can extend the liquid flow path, increase the liquid flow time between the fixed spiral blades, and further improve the heat exchange efficiency.

[0010] Preferably, the cylinder is provided with an air outlet, which can discharge excess gas inside the equipment during operation, filling the interior with a fluid heat source, thereby improving heat exchange efficiency.

[0011] Preferably, the outer side of the cylinder is provided with several support legs to facilitate installation by operators.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] 1) When the heat source fluid enters through inlet II, it passes through the slow-flow tube and first passes through two sets of baffles IV, causing the fluid to gather in the middle and impact baffles III, reducing its impact force. After impacting baffles III, the fluid splits to both sides and impacts baffles II for secondary obstruction. Then, it gathers in the middle and impacts baffles I before being split into the cylinder. At the same time, baffles I is provided with several through holes, which can further reduce its impact force. Thus, after passing through multiple layers of obstruction, the fluid is prevented from directly impacting the heat exchange tubes and causing damage to their surface glaze, thereby increasing the service life of the heat exchange tubes and reducing maintenance costs. After its flow velocity is reduced by the slow-flow tube, it enters between the two sets of mounting tube sheets in the cylinder and moves along the fixed spiral blades until it flows out at outlet II, thus completing the heat transfer between several heat exchange tubes.

[0014] 2) After the fluid velocity is reduced by the slow-flow tube, it enters between the two sets of mounting tube sheets in the tube body and rotates along the fixed spiral blades. At the same time, there are several baffles between the fixed spiral blades. The water holes on one side of the baffles are staggered. During the flow process, the fluid will be blocked twice by the baffles and repeatedly change direction, thereby prolonging the contact time between the fluid and the heat exchange tube and improving the heat exchange efficiency. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the structure of a corrosion-resistant glass-lined high-efficiency heat exchanger according to this utility model;

[0016] Appendix Figure 2 This is a schematic diagram of the internal structure of the cylinder;

[0017] Appendix Figure 3 This is a schematic diagram of a fixed helical blade structure;

[0018] Appendix Figure 4 This is a schematic diagram of the internal structure of the flow control tube;

[0019] In the diagram: 10. Cylinder body; 11. Inlet I; 12. Outlet I; 13. Inlet II; 14. Outlet II; 15. Air outlet; 16. Support leg; 17. Flow buffer; 18. Heat exchange tube; 19. Fixed shaft; 20. Fixed spiral blade; 21. Water baffle; 101. Mounting tube sheet; 171. Baffle plate I; 172. Baffle plate II; 173. Baffle plate III; 174. Baffle plate IV; 211. Water permeable hole. Detailed Implementation

[0020] To facilitate understanding by those skilled in the art, the following is a detailed explanation in conjunction with the appendix. Figure 1-4 The technical solution of this utility model will be further described in detail below.

[0021] A corrosion-resistant glass-lined high-efficiency heat exchanger includes a cylindrical body 10, an inlet I 11, an outlet I 12, an inlet II 13, an outlet II 14, a flow-retardant cylinder 17, heat exchange tubes 18, a fixed shaft 19, fixed spiral blades 20, and mounting tube sheets 101. Two sets of mounting tube sheets 101 are provided inside the cylindrical body 10. The mounting tube sheets 101 are fixedly mounted on the outside via flanges. A fixed shaft 19 is provided between the two sets of mounting tube sheets 101. The fixed shaft 19 is connected to the cylindrical body 10. A fixed spiral blade 20 is wound between the inner sidewalls of the cylinder. Several heat exchange tubes 18 are provided in the corresponding through holes on the mounting tube plate 101 and the fixed spiral blade 20. The two sets of mounting tube plates on the outer side of the cylinder body and the upper and lower sides of the cylinder body 10 are respectively fixedly connected to the inlet I11 and the outlet I12. The fluid to be heated is connected to the inlet I11 and enters the cylinder body 10. After passing through several heat exchange tubes 18, it enters the other end of the cylinder body 10 and flows out at the outlet I12 to complete the heat exchange.

[0022] The upper and lower sides of the two sets of mounting tube sheets 101 of the cylinder 10 are fixedly connected to the inlet II 13 and the outlet II 14. The inlet II 13 is equipped with a flow-slowing tube 17 through a flange joint. The heat source fluid is connected to the inlet II 13, and after passing through the flow-slowing tube 17 to reduce its flow velocity, it enters the space between the two sets of mounting tube sheets 101 of the cylinder 10 and moves along the fixed spiral blades 20 until it flows out at the outlet II 14, thereby completing the heat transfer between the heat exchange tubes 18.

[0023] The cylinder 10 is provided with an air outlet 15, which can discharge excess gas inside the equipment when it is working, so that the inside is filled with fluid heat source, thereby improving heat exchange efficiency.

[0024] The outer side of the cylinder 10 is provided with several support legs 16 to facilitate installation by operators.

[0025] The slow-flow cylinder 17 is internally equipped with several baffles I 171, II 172, III 173, and IV 174. When the heat source fluid enters through the inlet II 13, it passes through the slow-flow cylinder 17 and first passes through two sets of baffles IV 174, causing the heat source fluid to concentrate in the middle and impact baffles III 173, reducing its impact force. After impacting baffles III 173, the fluid splits to both sides and impacts baffles II 172 for secondary stress relief. Then, it concentrates in the middle and impacts baffles I 171 before flowing into the cylinder 10. At the same time, baffles I 171 is provided with several through holes, which can further reduce its impact force. Thus, after multiple layers of stress relief, the fluid is prevented from directly impacting the heat exchange tubes and causing damage to their surface glaze. After its flow velocity is reduced by the slow-flow cylinder, it enters between the two sets of mounting tube sheets in the cylinder and moves along the fixed spiral blades 20 until it flows out at the outlet II 14, thereby completing the heat transfer between the heat exchange tubes.

[0026] Several baffles 21 are provided between the fixed spiral blades 20. A water-permeable hole 211 is provided on one side of the baffle 21. The water-permeable holes 211 on the two sets of baffles 21 are in opposite positions, which can extend the liquid flow path, increase the liquid flow time between the fixed spiral blades 20, and further improve the heat exchange efficiency.

[0027] A corrosion-resistant, high-efficiency glass-lined heat exchanger operates as follows: The fluid to be heated enters the cylinder 10 through inlet I11, passes through several heat exchange tubes 18, and flows out at outlet I12, completing heat exchange. While passing through the heat exchange tubes 18, the heat source fluid is connected to inlet II13, and its flow velocity is reduced by a flow buffer 17. First, it passes through two sets of baffles IV174, causing the heat source fluid to concentrate towards the center, impacting baffle III173 to reduce the impact force. After impacting baffle III173, the fluid splits to both sides, impacting baffle II172 for secondary stress relief. Then, it concentrates towards the center, impacting baffle I171 before flowing into the cylinder 10. The flow baffle plate I171 is provided with several through holes, which can further reduce its impact force. After multiple layers of stress relief, the fluid is prevented from directly impacting the heat exchange tube and causing damage to its surface glaze. Then it enters between the two sets of mounting tube plates 101 in the cylinder 10 and moves along the fixed spiral blades 20. Several baffle plates 21 are provided between the fixed spiral blades 20. The water permeable holes 211 on the two sets of baffle plates 21 are in opposite positions, which can prolong the liquid flow path and increase the liquid flow time between the fixed spiral blades 20, further improving the heat exchange efficiency. The heat source finally flows out at the outlet II14, thus completing the heat transfer between the heat exchange tubes 18.

[0028] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A corrosion-resistant glass-lined high-efficiency heat exchanger, comprising a cylinder, inlet I, outlet I, inlet II, outlet II, a flow-regulating cylinder, heat exchange tubes, a fixed shaft, fixed spiral blades, and a mounting tube sheet, characterized in that... The cylinder is equipped with two sets of mounting tube sheets. The mounting tube sheets are fixedly installed on the outside by flanges. A fixed shaft is provided between the two sets of mounting tube sheets. Fixed spiral blades are wound between the fixed shaft and the inner wall of the cylinder. Several heat exchange tubes are provided in the corresponding through holes on the mounting tube sheets and the fixed spiral blades. The two sets of mounting tube sheets of the cylinder and the upper and lower sides of the cylinder are respectively fixedly connected to the inlet I and the outlet I. The fluid to be heated is connected to the inlet I and enters the cylinder. After passing through several heat exchange tubes, it enters the other end of the cylinder and flows out at the outlet I to complete the heat exchange. The cylinder has two sets of mounting tube sheets connected by inlet II and outlet II on the upper and lower sides. A flow-slowing cylinder is installed inside inlet II via a flange joint. Inside the flow-slowing cylinder, several flow-blocking plates I, II, III, and IV are installed alternately. When the heat source fluid enters through inlet II, it passes through the flow-slowing cylinder and first passes through two sets of flow-blocking plates IV, causing the fluid to gather in the middle and impact flow-blocking plate III. After impacting flow-blocking plate III, the fluid is split to both sides and impacts flow-blocking plate II for secondary obstruction. Then, it gathers in the middle and impacts flow-blocking plate I before being split into the space between the two sets of mounting tube sheets and moving along the fixed spiral blades until it flows out at outlet II.

2. The corrosion-resistant glass-lined high-efficiency heat exchanger according to claim 1, characterized in that... Several water baffles are provided between the fixed spiral blades, and water permeable holes are provided on one side of the water baffles.

3. The corrosion-resistant glass-lined high-efficiency heat exchanger according to claim 1, characterized in that... The cylinder is provided with an air outlet.

4. The corrosion-resistant glass-lined high-efficiency heat exchanger according to claim 1, characterized in that... The outer side of the cylinder is provided with several legs.

5. A corrosion-resistant glass-lined high-efficiency heat exchanger according to claim 1, characterized in that... The flow-blocking plate I has several through holes.

Images