Sleeve heat exchange device and sleeve heat exchange system

Abstract

The utility model discloses a sleeve heat exchange device which comprises a heat exchange shell, a bottom cover, a first partition plate, a second partition plate, a third partition plate, a fourth partition plate and a top cover, the bottom cover, the first partition plate, the second partition plate, the third partition plate, the fourth partition plate and the top cover are sequentially arranged in the axial direction of the heat exchange shell, and an outer pipe is arranged between the second partition plate and the third partition plate. The two ends of the inner pipe are detachably connected with the first partition plate and the fourth partition plate correspondingly, and the bottom cover and the top cover are detachably connected with the heat exchange shell. The utility model further discloses a double-pipe heat exchange system which comprises a gas-liquid separation device, a circulating pump and the double-pipe heat exchange device, the circulating pump is connected with the discharging end and the feeding port of the gas-liquid separation device, the discharging port is communicated with the feeding end of the gas-liquid separation device, the steam inlet and the steam outlet are connected with a steam device, and the vacuum port is connected with an air extractor. The double-pipe heat exchange device and the double-pipe heat exchange system have the advantages that the inner pipe can be conveniently and independently detached to remove scales, and the interior of the outer pipe and detached parts can be conveniently cleaned.

Description

Technical Field

[0001] This utility model relates to the field of food and pharmaceutical packaging equipment technology, specifically to a tube heat exchange device and tube heat exchange system. Background Technology

[0002] A shell-and-tube concentrator consists of two straight tubes of different diameters nested together to form a concentric shell. The inner and outer tubes are sequentially connected by U-shaped elbows to form a shell assembly, with each section of the shell called a pass. During concentration and heat exchange, one fluid flows through the inner tube and diffuses through the outer tube, while the other fluid flows through the annular gap of the shell. The walls of the inner and outer tubes serve as heat transfer surfaces. This type of concentrator offers advantages such as high pressure resistance, adjustable heat transfer area, and the two fluids generally flowing counter-currently, which is beneficial for heat transfer. Currently, research on enhanced heat transfer in shell-and-tube concentrators mainly focuses on single-sided enhanced heat transfer in either the tube side or the shell side. Common methods include increasing the heat transfer area on the inner and outer surfaces of the tubes, promoting fluid turbulence within the flow channel, and reducing the thickness of the thermal boundary layer, thereby achieving a double-sided, dual-enhanced heat transfer effect.

[0003] However, in the evaporation and concentration process of this type of concentrator in the traditional Chinese medicine industry and the salt chemical industry, the final concentration and viscosity of the concentrated material increase. This causes the material to crystallize and precipitate on the inner tube wall due to excessive heating, resulting in scaling, which causes great trouble to the production work.

[0004] A composite shell-and-tube heat exchanger for supercritical fluid heat exchange, disclosed in Chinese Patent Application No. 202211667959.1, has its inner tubes fixed between a first front tube sheet and a first rear tube sheet, making it inconvenient to disassemble them separately for scaling removal. Furthermore, the first rear tube sheet is fixed to the rear shell, also making it inconvenient to disassemble it separately for scaling removal. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a shell-and-tube heat exchange device and system that facilitates the separate disassembly of the inner tube for scale removal and the cleaning of the inner part of the outer tube and disassembled components.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A shell-and-tube heat exchange device includes a heat exchange shell and a bottom cover, a first partition, a second partition, a third partition, a fourth partition, and a top cover arranged sequentially along the axial direction of the heat exchange shell. An outer tube is provided between the second partition and the third partition, and an inner tube is inserted through the outer tube. The two ends of the inner tube are detachably connected to the first partition and the fourth partition, respectively. The bottom cover and the top cover are both detachably connected to the heat exchange shell.

[0008] As a further improvement to the above technical solution:

[0009] One end of the inner tube is provided with an external convex ring, and the other end is provided with a fastening pressure ring. The external convex ring and the fastening pressure ring are respectively pressed onto the first partition and the fourth partition.

[0010] The convex ring is pressed onto the side of the first partition facing the bottom cover, and the fastening ring is pressed onto the side of the fourth partition facing the top cover.

[0011] A sealing gasket is provided between the outer convex ring and the first partition plate.

[0012] The fourth partition is detachably mounted on the heat exchange shell.

[0013] The heat exchange shell is provided with a limiting ring, and the fourth partition is pressed against the limiting ring by a fastening pressure ring.

[0014] Both the bottom cover and the top cover are detachably connected to the heat exchange shell by fixing bolts.

[0015] The heat exchange shell forms a condensate chamber between the bottom cover and the first partition, a feed chamber between the first partition and the second partition, a heat exchange chamber between the second partition and the third partition, a discharge chamber between the third partition and the fourth partition, and a steam chamber between the fourth partition and the top cover. A material channel is formed between the outer tube and the inner tube.

[0016] The bottom cover is provided with a condensate outlet, the side wall of the feeding chamber is provided with a feed inlet, the side wall of the discharging chamber is provided with a discharge outlet, the side wall of the heat exchange chamber is provided with a steam inlet, a steam outlet and a condensate outlet, and the top cover is provided with a steam inlet and a vacuum port.

[0017] A shell-and-tube heat exchange system includes a gas-liquid separation device, a circulating pump, and the aforementioned shell-and-tube heat exchange device. The circulating pump is connected to the outlet and inlet of the gas-liquid separation device, and the outlet is connected to the inlet of the gas-liquid separation device. The steam inlet and steam port are connected to a steam device, and the vacuum port is connected to a vacuum pump.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] This utility model's shell-and-tube heat exchanger, with its bottom and top covers detachably connected to the heat exchange shell, and its inner tube detachably connected to the first and fourth partitions respectively at both ends, allows for easy removal of the inner tube from the outer tube by removing the bottom and top covers, then disconnecting the inner tube from the first and fourth partitions. This facilitates separate disassembly of the inner tube for scaling removal and cleaning of the interior of the outer tube and disassembled components.

[0020] The shell-and-tube heat exchange system of this invention includes a heat exchange device and has all the advantages of a heat exchange device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main cross-sectional structure of the shell-and-tube heat exchange device of this utility model.

[0022] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0023] Figure 3 yes Figure 1 A magnified structural diagram at point B in the middle.

[0024] Figure 4 This is a split view of the shell-and-tube heat exchange device of this utility model.

[0025] Figure 5 This is a schematic diagram of the structure of the shell-and-tube heat exchange system of this utility model.

[0026] The labels in the diagram represent:

[0027] 1. Heat exchange shell; 10. Limiting ring; 101. Gas-liquid separation device; 102. Circulating pump; 11. Condensate chamber; 12. Feed chamber; 121. Feed inlet; 13. Heat exchange chamber; 131. Steam inlet; 132. Steam outlet; 133. Condensate outlet; 14. Discharge chamber; 141. Discharge outlet; 15. Steam chamber; 2. Bottom cover; 201. Fixing bolt; 21. Condensate outlet; 3. First partition; 31. Sealing gasket; 4. Second partition; 5. Third partition; 6. Fourth partition; 7. Top cover; 71. Steam inlet; 72. Vacuum port; 8. Outer pipe; 81. Material channel; 9. Inner pipe; 91. Outer convex ring; 92. Fastening pressure ring. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Example 1:

[0033] Figures 1 to 4 An embodiment of the shell-and-tube heat exchanger of this utility model is shown. The shell-and-tube heat exchanger of this embodiment includes a heat exchange shell 1 and a bottom cover 2, a first partition 3, a second partition 4, a third partition 5, a fourth partition 6 and a top cover 7 arranged sequentially along the axial direction of the heat exchange shell 1. An outer tube 8 is provided between the second partition 4 and the third partition 5. An inner tube 9 is inserted through the outer tube 8. The two ends of the inner tube 9 are detachably connected to the first partition 3 and the fourth partition 6 respectively. The bottom cover 2 and the top cover 7 are both detachably connected to the heat exchange shell 1.

[0034] Since both the bottom cover 2 and the top cover 7 are detachably connected to the heat exchange shell 1, and both ends of the inner tube 9 are detachably connected to the first partition 3 and the fourth partition 6 respectively, when removing the inner tube 9, the bottom cover 2 and the top cover 7 are removed, and then the connection between the inner tube 9 and the first partition 3 and the fourth partition 6 is disconnected, allowing the inner tube 9 to be removed from the outer tube 8. This facilitates the separate disassembly of the inner tube 9 for scaling removal, and also facilitates the cleaning of the interior of the outer tube 8 and its disassembled components.

[0035] Furthermore, such as Figure 2 and Figure 3 As shown, in this embodiment, one end (bottom end) of the inner tube 9 is provided with an outwardly protruding ring 91, and the other end (top end) is provided with a fastening ring 92. The outwardly protruding ring 91 and the fastening ring 92 are respectively pressed onto the first partition 3 and the fourth partition 6. In this way, the inner tube 9 can be pulled out downwards by removing the fastening ring 92. The structure is ingeniously designed and easy to assemble and disassemble.

[0036] Furthermore, in this embodiment, the outer protruding ring 91 is pressed onto the side of the first partition 3 facing the bottom cover 2 (the bottom side of the bottom cover 2), and the fastening ring 92 is pressed onto the side of the fourth partition 6 facing the top cover 7. After disassembling the bottom cover 2 and the top cover 7, the fastening ring 92 can be removed and the inner tube 9 can be pulled out through the outer protruding ring 91; conversely, the inner tube 9 can be installed, further improving the convenience of disassembling and assembling the inner tube 9.

[0037] Furthermore, such as Figure 3 As shown, in this embodiment, a sealing gasket 31 is provided between the outer convex ring 91 and the first partition plate 3 to improve the sealing performance at the connection.

[0038] Furthermore, in this embodiment, the fourth partition 6 is detachably mounted on the heat exchange shell 1. After removing the top cover 7 and the inner tube 9, the fourth partition 6 can be removed, thus facilitating the individual removal of the fourth partition 6 for scale removal. It also facilitates the cleaning of the space above the third partition 5.

[0039] Furthermore, such as Figure 2 As shown, in this embodiment, a limiting ring 10 is provided inside the heat exchange shell 1, and the fourth partition 6 is pressed against the limiting ring 10 by a fastening ring 92. The fourth partition 6 is pressed against the limiting ring 10 by the fastening ring 92; by simply removing the fastening ring 92, the fourth partition 6 can be removed. Thus, the fastening ring 92 fixes both the inner tube 9 and the fourth partition 6, simplifying the design of the fixing structure, saving manufacturing costs, and facilitating disassembly and assembly. Preferably, the limiting ring 10 is welded to the inner wall of the heat exchange shell 1.

[0040] Furthermore, in this embodiment, both the bottom cover 2 and the top cover 7 are detachably connected to the heat exchange housing 1 by fixing bolts 201, making disassembly and assembly convenient. Furthermore, sealing rings are provided between the bottom cover 2 and the top cover 7 and the heat exchange housing 1 to improve the sealing performance at the connection.

[0041] Furthermore, in this embodiment, the heat exchange shell 1 forms a condensate chamber 11 between the bottom cover 2 and the first partition 3, a feed chamber 12 between the first partition 3 and the second partition 4, a heat exchange chamber 13 between the second partition 4 and the third partition 5, a discharge chamber 14 between the third partition 5 and the fourth partition 6, a steam chamber 15 between the fourth partition 6 and the top cover 7, and a material channel 81 between the outer tube 8 and the inner tube 9.

[0042] Furthermore, in this embodiment, the bottom cover 2 is provided with a condensate outlet 21, the side wall of the feeding chamber 12 is provided with a feed inlet 121, the side wall of the discharge chamber 14 is provided with a discharge outlet 141, the side wall of the heat exchange chamber 13 is provided with a steam inlet 131, a steam outlet 132, and a condensate outlet 133, and the top cover 7 is provided with a steam inlet 71 and a vacuum port 72. In use, the steam inlet 131 and the steam inlet 71 are connected to a steam supply device. The material enters the feeding chamber 12 through the feed inlet 121, and then flows to the discharge chamber 14 through the material channel 81. During the process of the material passing through the material channel 81, it exchanges heat with the heat exchange chamber 13 and the inner tube 9.

[0043] Example 2:

[0044] Figure 5 An embodiment of the shell-and-tube heat exchanger of the present invention is shown. The shell-and-tube heat exchanger system of this embodiment includes a gas-liquid separation device 101, a circulating pump 102 and the shell-and-tube heat exchanger of Embodiment 1. The circulating pump 102 is connected to the discharge end and the inlet 121 of the gas-liquid separation device 101. The discharge port 141 is connected to the inlet end of the gas-liquid separation device 101. The steam inlet 131 and the steam outlet 71 are connected to a steam device. The vacuum port 72 is connected to a vacuum pump.

[0045] The production process of this heat exchange system is as follows: Vacuum is drawn into the steam chamber 15 and condensate chamber 11 through vacuum port 72; heat exchange medium (such as steam) is introduced into the heat exchange chamber 13 and steam chamber 15 through steam inlet 131 and steam outlet 71; material enters the feed chamber 12 from feed port 121, and then flows through the feed chamber 12 and material channel 81 to the discharge chamber 14. During the process of passing through material channel 81, the material exchanges heat with the heat exchange chamber 13 and inner tube 9; the material is pumped into the gas-liquid separator 101 through the outlet 141 by the circulation pump 102. The material forms a circulation flow by passing through feed port 121, feed chamber 12, material channel 81, discharge chamber 14, gas-liquid separator 101, and circulation pump 102 in sequence, and is discharged from the outlet 141 to the gas-liquid separator 101 for concentration. After concentration, the material continues to circulate and concentrate through pipelines. After the material meets the requirements, it becomes a finished product and is discharged from the gas-liquid separator 101.

[0046] This heat exchange system includes a heat exchange device and has all the advantages of a heat exchange device.

[0047] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A shell-and-tube heat exchanger, characterized in that: The heat exchange shell (1) includes a bottom cover (2), a first partition (3), a second partition (4), a third partition (5), a fourth partition (6) and a top cover (7) arranged sequentially along the axial direction of the heat exchange shell (1). An outer tube (8) is provided between the second partition (4) and the third partition (5). An inner tube (9) is inserted through the outer tube (8). The two ends of the inner tube (9) are detachably connected to the first partition (3) and the fourth partition (6) respectively. The bottom cover (2) and the top cover (7) are both detachably connected to the heat exchange shell (1).

2. The shell-and-tube heat exchanger according to claim 1, characterized in that: One end of the inner tube (9) is provided with an external convex ring (91), and the other end is provided with a fastening ring (92). The external convex ring (91) and the fastening ring (92) are respectively pressed on the first partition (3) and the fourth partition (6).

3. The shell-and-tube heat exchanger according to claim 2, characterized in that: The outer convex ring (91) is pressed on the side of the first partition (3) facing the bottom cover (2), and the fastening ring (92) is pressed on the side of the fourth partition (6) facing the top cover (7).

4. The shell-and-tube heat exchanger according to claim 3, characterized in that: A sealing gasket (31) is provided between the outer convex ring (91) and the first partition plate (3).

5. The shell-and-tube heat exchanger according to claim 2, characterized in that: The fourth partition (6) is detachably mounted on the heat exchange shell (1).

6. The shell-and-tube heat exchanger according to claim 5, characterized in that: The heat exchange shell (1) is provided with a limiting ring (10), and the fourth partition (6) is pressed against the limiting ring (10) by a fastening ring (92).

7. The shell-and-tube heat exchanger according to any one of claims 1 to 5, characterized in that: The bottom cover (2) and the top cover (7) are detachably connected to the heat exchange shell (1) by fixing bolts (201).

8. The shell-and-tube heat exchanger according to any one of claims 1 to 5, characterized in that: The heat exchange shell (1) forms a condensate chamber (11) between the bottom cover (2) and the first partition (3), a feed chamber (12) between the first partition (3) and the second partition (4), a heat exchange chamber (13) between the second partition (4) and the third partition (5), a discharge chamber (14) between the third partition (5) and the fourth partition (6), and a steam chamber (15) between the fourth partition (6) and the top cover (7). A material channel (81) is formed between the outer tube (8) and the inner tube (9).

9. The shell-and-tube heat exchanger according to claim 8, characterized in that: The bottom cover (2) is provided with a condensate outlet (21), the side wall of the feed chamber (12) is provided with a feed port (121), the side wall of the discharge chamber (14) is provided with a discharge port (141), the side wall of the heat exchange chamber (13) is provided with a steam inlet (131), a steam outlet (132) and a condensate outlet (133), and the top cover (7) is provided with a steam inlet (71) and a vacuum port (72).

10. A shell-and-tube heat exchange system, characterized in that: The device includes a gas-liquid separator (101), a circulating pump (102), and a shell-and-tube heat exchanger as described in claim 9. The circulating pump (102) is connected to the outlet and inlet (121) of the gas-liquid separator (101). The outlet (141) is connected to the inlet of the gas-liquid separator (101). The steam inlet (131) and steam outlet (71) are connected to a steam device. The vacuum port (72) is connected to a vacuum pump.

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