Vertical double water film tube heat exchanger

Abstract

The utility model discloses a vertical double water membrane pipe type heat exchanger, including feed assembly, heat exchange pipe subassembly and discharge assembly, feed assembly is connected with the bottom of heat exchange pipe subassembly, and discharge assembly is connected with the top of heat exchange pipe subassembly, and heat exchange pipe subassembly includes the outer tube body of vertical distribution and the upper end plate and lower end plate fixedly connected with the both ends sealing of outer tube body respectively, and a plurality of parallel interval distribution heat exchange pipelines are communicated between the upper end plate and lower end plate, a plurality of intercepting plates are arranged in the inner chamber of outer tube body, and the inner chamber of outer tube body is divided into a plurality of heat exchange chambers by intercepting plate, and intercepting plate is equipped with the gap and the flow guide hole, and the inner wall of flow guide hole and the outer wall of heat exchange pipeline leave the gap between, the upper portion of outer tube body is equipped with the in condensed water joint, and the lower portion of outer tube body is equipped with the out condensed water joint, the utility model discloses when utilizing the condensed water of small unit, need not fill entire heat exchange pipe subassembly to carry out more effective heating to material, has the advantage of high energy utilization and less energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of tubular heat exchanger technology, and in particular to a vertical double water film tubular heat exchanger. Background Technology

[0002] Currently, most industries require materials to be heated before entering the unit. Traditional tubular or plate heat exchangers require a large amount of hot water to fill the chamber in order to conduct heat and heat the materials. Because the material tube area is limited, even if the chamber is filled, the heating effect on the materials is limited. For small units, the amount of condensate produced is much less than that of large units. When using small units, if materials are still heated in the manner of filling the chamber, the heat exchange effect will be not obvious and the heat exchange efficiency will be low. Utility Model Content

[0003] The purpose of this invention is to provide a vertical double-film tube heat exchanger that effectively solves the problems mentioned in the background art, such as insignificant heat exchange effect, low heat exchange efficiency, and poor performance in small-unit applications.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A vertical double-film tube heat exchanger includes a feed assembly, a heat exchange tube assembly, and a discharge assembly. The feed assembly is connected to the bottom of the heat exchange tube assembly, and the discharge assembly is connected to the top of the heat exchange tube assembly. The heat exchange tube assembly includes a vertically distributed outer tube body and an upper end plate and a lower end plate that are respectively sealed and fixedly connected to both ends of the outer tube body. A plurality of parallel and spaced heat exchange pipes are connected between the upper end plate and the lower end plate. A plurality of flow-blocking plates are provided in the inner cavity of the outer tube body, which divide the inner cavity of the outer tube body into multiple heat exchange chambers. The flow-blocking plates have notches connecting the two heat exchange chambers on both sides and guide holes for the heat exchange pipes to pass through. A gap is left between the inner wall of the guide holes and the outer wall of the heat exchange pipes. The upper part of the outer tube body is provided with a condensate inlet connector communicating with the uppermost heat exchange chamber, and the lower part of the outer tube body is provided with a condensate outlet connector communicating with the lowermost heat exchange chamber.

[0006] Furthermore, one of the heat exchange pipes is distributed along the central axis of the outer tube, while the remaining heat exchange pipes are arranged in a circular array around the central axis of the outer tube.

[0007] Furthermore, the number of heat exchange pipes is set to 7.

[0008] Furthermore, the heat exchange pipe is a straight pipe with a circular cross-section, and the flow guide hole is a circular through hole.

[0009] Furthermore, the inner diameter of the flow guide hole is 1mm to 3mm larger than the outer diameter of the heat exchange pipe.

[0010] Furthermore, the flow cut-off plate is perpendicular to the central axis of the outer tube.

[0011] Furthermore, the notches on the two adjacent cut-off plates are arranged in a staggered manner.

[0012] Furthermore, the feeding assembly includes a feeding chamber and a feeding connector. One end of the feeding connector is connected to the bottom of the feeding chamber. A first flange is fixedly connected to the top of the feeding chamber, and a second flange connected to the first flange is fixedly connected to the lower end plate.

[0013] Furthermore, the feed chamber is filled with filter cotton.

[0014] Furthermore, the discharge assembly includes a discharge chamber and a discharge connector. One end of the discharge connector is connected to the side wall of the discharge chamber. A third flange is fixedly connected to the bottom of the discharge chamber, and a fourth flange connected to the third flange is fixedly connected to the upper end plate.

[0015] Compared with the prior art, this utility model provides a vertical double water film tube heat exchanger, which has the following advantages:

[0016] The condensate flowing from top to bottom passes through the baffle plate and the guide holes on the baffle plate, where the warm condensate forms a water film that exchanges heat with the material inside the heat exchange pipe. One side of the water film contacts the metal heat exchange pipe, and the other side contacts the air inside the outer pipe. Since the heat transfer coefficient of metal is greater than that of air, most of the heat from the condensate is conducted to the material and heats it, with little external work done. Therefore, the limited temperature of the condensate in the small unit can be fully utilized, and the material can be heated more effectively without filling the entire heat exchange pipe assembly. This has the advantages of high energy utilization and low energy consumption. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an assembly diagram of the present invention;

[0019] Figure 2 This is a side view of the present invention;

[0020] Figure 3This is a schematic diagram of a half-section structure of the present invention;

[0021] Figure 4 for Figure 3 Cross-sectional view along the AA direction;

[0022] Figure 5 for Figure 3 Enlarged diagram of point B in the middle.

[0023] Reference numerals: 1. Feed assembly; 11. Feed chamber; 12. Feed connector; 13. First flange; 14. Filter cotton; 2. Heat exchange tube assembly; 21. Outer tube body; 22. Upper end plate; 221. Fourth flange; 23. Lower end plate; 231. Second flange; 24. Heat exchange pipe; 25. Cut-off plate; 251. Notch; 252. Guide hole; 26. Heat exchange chamber; 27. Condensate inlet connector; 28. Condensate outlet connector; 3. Discharge assembly; 31. Discharge chamber; 32. Discharge connector; 33. Third flange; 34. Flange blind plate; 4. Sealing gasket. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below through detailed embodiments and in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0025] Please refer to Figures 1-5This embodiment provides a vertical double water film tube heat exchanger, including a feed assembly 1, a heat exchange tube assembly 2, and a discharge assembly 3. The feed assembly 1 is connected to the bottom of the heat exchange tube assembly 2, and the discharge assembly 3 is connected to the top of the heat exchange tube assembly 2. The heat exchange tube assembly 2 includes a vertically distributed outer tube body 21 and an upper end plate 22 and a lower end plate 23 welded and sealed to both ends of the outer tube body 21, respectively. A plurality of parallel and spaced heat exchange pipes 24 are welded and connected between the upper end plate 22 and the lower end plate 23. A plurality of flow-blocking plates 25 are welded and installed in the inner cavity of the outer tube body 21. The flow-blocking plates 25 divide the inner cavity of the outer tube body 21 into a plurality of heat exchange chambers 26. The flow-blocking plates 25 are provided with notches 251 connecting the two heat exchange chambers and guide holes 252 for the heat exchange pipes 24 to pass through. A gap is left between the inner wall of the guide hole 252 and the outer wall of the heat exchange pipe 24. A condensate inlet connector 27 connected to the uppermost heat exchange chamber is welded to the upper part of the outer tube body 21, and a condensate outlet connector 28 connected to the lowermost heat exchange chamber is welded to the lower part of the outer tube body 21. In this way, the condensate flowing from top to bottom passes through the baffle plate and the guide holes on the baffle plate, and the warm condensate exchanges heat with the material in the heat exchange pipe in the form of a water film. One side of the water film is in contact with the metal heat exchange pipe, and the other side is in contact with the air inside the outer tube. Since the heat transfer coefficient of metal is greater than that of air, most of the heat from the condensate is conducted to the material and heats the material. It does little external work, so it can make full use of the limited temperature of the condensate in the small unit. It does not need to fill the entire heat exchange tube assembly to heat the material more effectively, which has the advantages of high energy utilization and low energy consumption.

[0026] In some specific implementation methods, refer to Figures 1-5 The heat exchange pipes 24 are provided in a total of 7, with one heat exchange pipe 24 distributed along the central axis of the outer tube body 21, and the remaining heat exchange pipes 24 arranged in a circular array around the central axis of the outer tube body 21. In this way, the liquid material can be divided into multiple fluid streams, thereby improving the heat exchange efficiency.

[0027] In some specific implementation methods, such as Figure 4 As shown, the heat exchange pipe 24 is a straight metal pipe with a circular cross-section. The flow cutter 25 is an incomplete circular metal plate, with a notch 251 formed by cutting and a guide hole 252 formed by punching. The guide hole 252 is a circular through hole.

[0028] As a preferred embodiment, such as Figure 4As shown, the inner diameter of the guide hole 252 is 1mm to 3mm larger than the outer diameter of the heat exchange pipe 24, thereby facilitating the smooth flow of condensate through the gap between the guide hole and the heat exchange pipe and forming a water film covering the surface of the heat exchange pipe. For example, the inner diameter of the guide hole is 2mm larger than the outer diameter of the heat exchange pipe.

[0029] In some specific implementation methods, such as Figure 3 As shown, the baffle plate 25 is perpendicular to the central axis of the outer tube 21, which allows the condensate to remain for a longer time when flowing from top to bottom, which is conducive to promoting sufficient heat exchange between the condensate and the liquid material, thereby improving the heat exchange efficiency.

[0030] As an improved implementation method, refer to Figure 1 and Figure 3 The notches 251 on the two adjacent baffles 25 are staggered, which allows the condensate to flow along a meandering path, thereby improving the heat exchange efficiency.

[0031] For example, see reference Figure 1 and Figure 3 There are 4 interceptor plates 25, and two adjacent interceptor plates 25 are distributed at a distance of 90mm.

[0032] In some specific implementation methods, refer to Figures 1-3 The feeding assembly 1 includes a feeding chamber 11 and a feeding connector 12. One end of the feeding connector 12 communicates with the bottom of the feeding chamber 11. A first flange 13 is fixedly connected to the top of the feeding chamber 11, and a second flange 231 connected to the first flange 13 is fixedly connected to the lower end plate 23. Specifically, the lower part of the feeding chamber 11 and the feeding connector 12 are connected by an arc-shaped transition surface.

[0033] In some specific implementation methods, refer to Figure 3 The feed chamber 11 is filled with filter cotton 14, which can filter the incoming liquid material and remove impurities.

[0034] In some specific implementation methods, refer to Figures 1-3 The discharge assembly 3 includes a discharge chamber 31 and a discharge connector 32. One end of the discharge connector 32 communicates with the side wall of the discharge chamber 31. A third flange 33 is fixedly connected to the bottom of the discharge chamber 31, and a fourth flange 221 connected to the third flange 33 is fixedly connected to the upper end plate 22. Specifically, the discharge chamber 31 is cylindrical. A flange blind plate 34 is provided at the top of the discharge chamber 31, which allows it to be fixed inside the unit.

[0035] In some specific implementation methods, refer to Figure 1To improve sealing performance, sealing gaskets 4 are respectively installed between the first flange 13 and the second flange 231, and between the third flange 33 and the fourth flange 221.

[0036] Instructions for use of this utility model: Connect the condensate inlet connector 27 to the condensate outlet of the small unit, and connect the feed connector 12 to the external material pipe. The liquid material flows in from the bottom feed connector 12, passes through the filter cotton 14 in the feed chamber 11 to remove impurities, and then flows from bottom to top through the heat exchange pipe 24, exchanging heat with the condensate film on the outer surface of the heat exchange pipe 24. Finally, it gathers in the discharge chamber 31 and leaves from the discharge connector 32. The condensate produced by the small unit flows into the outer pipe body 21 from the condensate inlet connector 27. As the condensate flows downward, part of it is intercepted by the baffle plate 25 and flows down along the pipe wall of the heat exchange pipe 24 through the guide hole 252 on the baffle plate, forming a water film. The other part of the condensate flows directly down through the notch 251 of the baffle plate and is intercepted by the next layer of staggered baffle plates. The condensate continues to flow down along the pipe wall of the heat exchange pipe through the guide hole on the baffle plate, thereby forming a new water film and thickening the original water film. The heat of the water film heats the material inside through the heat exchange pipe and is finally discharged through the condensate outlet connector.

[0037] The above embodiments are merely illustrative of the concept and technical solution of this utility model, and are not intended to limit this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vertical double-film tube heat exchanger, comprising a feed assembly, a heat exchange tube assembly, and a discharge assembly, wherein the feed assembly is connected to the bottom of the heat exchange tube assembly, and the discharge assembly is connected to the top of the heat exchange tube assembly, characterized in that, The heat exchange tube assembly includes a vertically distributed outer tube body and an upper end plate and a lower end plate that are sealed and fixedly connected to both ends of the outer tube body. Several parallel and spaced heat exchange pipes are connected between the upper end plate and the lower end plate. Several flow-blocking plates are provided in the inner cavity of the outer tube body, which divide the inner cavity of the outer tube body into multiple heat exchange chambers. The flow-blocking plates are provided with notches connecting the heat exchange chambers on both sides and guide holes for the heat exchange pipes to pass through. A gap is left between the inner wall of the guide hole and the outer wall of the heat exchange pipe. The upper part of the outer tube body is provided with a condensate inlet connector that communicates with the uppermost heat exchange chamber, and the lower part of the outer tube body is provided with a condensate outlet connector that communicates with the lowermost heat exchange chamber.

2. The vertical double-film tube heat exchanger according to claim 1, characterized in that, One of the heat exchange pipes is distributed along the central axis of the outer tube, and the remaining heat exchange pipes are distributed in a circular array around the central axis of the outer tube.

3. The vertical double-film tube heat exchanger according to claim 2, characterized in that, The number of heat exchange pipes is 7.

4. The vertical double-film tube heat exchanger according to claim 1, characterized in that, The heat exchange pipe is a straight pipe with a circular cross-section, and the flow guide hole is a circular through hole.

5. The vertical double-film tube heat exchanger according to claim 4, characterized in that, The inner diameter of the flow guide hole is 1mm to 3mm larger than the outer diameter of the heat exchange pipe.

6. The vertical double-film tube heat exchanger according to claim 1, characterized in that, The flow cut-off plate is perpendicular to the central axis of the outer tube.

7. The vertical double-film tube heat exchanger according to claim 1, characterized in that, The notches on the two adjacent crossbars are arranged in a staggered manner.

8. The vertical double-film tube heat exchanger according to claim 1, characterized in that, The feeding assembly includes a feeding chamber and a feeding connector. One end of the feeding connector is connected to the bottom of the feeding chamber. A first flange is fixedly connected to the top of the feeding chamber, and a second flange connected to the first flange is fixedly connected to the lower end plate.

9. The vertical double-film tube heat exchanger according to claim 8, characterized in that, The feed chamber is filled with filter cotton.

10. The vertical double-film tube heat exchanger according to claim 1, characterized in that, The discharge assembly includes a discharge chamber and a discharge connector. One end of the discharge connector is connected to the side wall of the discharge chamber. A third flange is fixedly connected to the bottom of the discharge chamber, and a fourth flange connected to the third flange is fixedly connected to the upper end plate.

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