Heat exchange device and heat exchange system

Abstract

The utility model discloses a heat exchange device which comprises a first heat exchange cavity, a second heat exchange cavity and a discharging cavity, the discharging cavity is arranged at one end of the first heat exchange cavity, the second heat exchange cavity is detachably arranged at the other end of the first heat exchange cavity, and a feeding cavity is formed between the second heat exchange cavity and the first heat exchange cavity. A first heat exchange pipe penetrates through the first heat exchange cavity, a second heat exchange pipe is arranged on the second heat exchange cavity, one end of the second heat exchange pipe is communicated with the interior of the second heat exchange cavity, the other end of the second heat exchange pipe is blocked, the second heat exchange pipe penetrates through the first heat exchange pipe, a material channel is formed between the second heat exchange pipe and the first heat exchange pipe, and the material channel is communicated with the feeding cavity and the discharging cavity. The utility model further discloses a heat exchange system which comprises the gas-liquid separation device, the circulating pump and the heat exchange device. The heat exchange device and the heat exchange system have the advantages that the heat exchange effect is improved, and disassembly and internal cleaning are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of food and drug packaging equipment, and particularly relates to a heat exchange device and a heat exchange system. Background Art

[0002] The shell-and-tube heat exchanger is a general standard heat exchanger and is a basic heat exchange and evaporation device in multiple industries such as traditional Chinese medicine, chemical engineering, food, biological fermentation, and environmental protection. It has the advantages of simple structure, durability, low cost, wide range of materials, easy cleaning, and strong adaptability, and is the most widely used and occupies a dominant position in heat exchange equipment. Relatively speaking, among different types of shell-and-tube heat exchangers, the fixed tube sheet heat exchanger is more commonly used.

[0003] The fixed tube sheet heat exchanger generally consists of components such as a shell, a tube bundle, a head, a tube sheet, a baffle plate, and a nozzle. The whole heat exchanger is divided into two parts: the channel inside the heat exchange tubes and the parts communicating with both ends thereof are collectively called the tube side; the channel outside the heat exchange tubes and the parts communicating therewith are called the shell side. The cold and hot fluids flow continuously in the tube side and the shell side respectively. The fluid flowing through the tube side is called the tube (tube side) fluid, and the fluid flowing through the shell side is called the shell (shell side) fluid. Heat exchange can occur between the cold and hot fluids, and the heat exchange capacity and efficiency are determined by the temperature difference inside and outside the tubes, the surface area of the tubes (heat exchange area), and the heat transfer coefficient k. At the same time, it is found through research that the flow velocity of the fluid in the tubes is the largest at the center of the tubes and the smallest near the wall. During heat exchange, the material close to the tube wall of the tubes exchanges heat more fully, while the heat exchange effect of the material at the center of the tubes is relatively limited.

[0004] Another type of heat exchanger is the double-pipe heat exchanger. This type of heat exchanger is composed of two straight pipes with different diameters sleeved together to form concentric sleeves. The inner pipes are sequentially connected by U-shaped elbows, and the outer pipes are connected to each other. Each section of the sleeve is called one pass. During heat exchange, one fluid flows through the inner pipe, and the other fluid flows through the annulus. The wall surface of the inner pipe is the heat transfer surface. This type of heat exchanger has the advantages of being able to withstand high pressure, the heat transfer area can be increased or decreased according to needs, by appropriately selecting the inner and outer diameters of the tubes, the flow velocity of the fluid can be increased, and the two fluids flow in countercurrent, which is beneficial to heat transfer. However, it also has the disadvantages of a large metal consumption per unit heat transfer area, many tube joints, and inconvenient maintenance and cleaning. At present, the enhanced heat transfer of the double-pipe heat exchanger mainly focuses on the research of unilateral enhanced heat transfer for either the tube side or the shell side. Generally, by increasing the heat transfer area of the inner and outer surfaces of the pipeline, promoting the disturbance of the fluid in the flow channel, and thinning the thickness of the thermal boundary layer, the effect of double-sided double enhanced heat transfer can be achieved.

[0005] When the above two heat exchangers are heating, they only have a good heating effect on the material close to the tube wall of the tube bundle, while the heating effect on the material at the midpoint of the tube bundle is limited. If the final concentration of the material to be heated is relatively high, the viscosity of the material also becomes relatively high. The flow rate of the material near the tube wall is low, and excessive heating and evaporation easily lead to crystallization and adhesion on the tube wall, resulting in fouling. This situation often occurs in the evaporation and concentration processes in the traditional Chinese medicine industry and the salt chemical industry, causing great trouble. The existing solution, such as a concentration system shown in CN202322669356.1, solves the above problems well, but the heat exchange inner cavity and the heat exchange flow channel are fixed together, with a complex structure and difficult to disassemble, and it is difficult to clean internally. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a heat exchange device and a heat exchange system that improve the heat exchange effect, are convenient for disassembly and internal cleaning.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A heat exchange device includes a first heat exchange chamber, a second heat exchange chamber, and a discharge chamber. The discharge chamber is provided at one end of the first heat exchange chamber. The second heat exchange chamber is detachably arranged at the other end of the first heat exchange chamber and forms a feed chamber with the first heat exchange chamber. A first heat exchange tube penetrates through the first heat exchange chamber. A second heat exchange tube is provided on the second heat exchange chamber. One end of the second heat exchange tube is internally communicated with the second heat exchange chamber and the other end is blocked. The second heat exchange tube penetrates through the first heat exchange tube and forms a material channel with the first heat exchange tube. The material channel communicates the feed chamber and the discharge chamber.

[0009] As a further improvement of the above technical solution:

[0010] The first heat exchange chamber is provided with a first inlet and a first outlet. The second heat exchange chamber is provided with a second inlet and a second outlet.

[0011] The first inlet and the first outlet are respectively provided on opposite sides of the first heat exchange chamber. The second inlet and the second outlet are respectively provided on opposite sides of the second heat exchange chamber.

[0012] The feed chamber is provided with a feed port. The discharge chamber is provided with a discharge port.

[0013] The bottom of the second heat exchange chamber is provided with a third outlet. The bottom of the first heat exchange chamber is provided with a fourth outlet.

[0014] A positioning member is arranged between the second heat exchange tube and the first heat exchange tube.

[0015] A positioning member is provided on the inner wall of the first heat exchange tube or the outer wall of the second heat exchange tube, and the second heat exchange tube is coaxial with the first heat exchange tube.

[0016] The positioning member is arranged at the end of the first heat exchange tube.

[0017] The second heat exchange chamber and the first heat exchange chamber are fixedly connected by fixing bolts; and / or, the housing of the discharge chamber and the first heat exchange chamber are fixedly connected by fixing bolts.

[0018] A heat exchange system includes a gas-liquid separation device, a circulation pump, and the above-mentioned heat exchange device. The circulation pump connects the discharge end and the feed port of the gas-liquid separation device. The discharge chamber is communicated with the feed end of the gas-liquid separation device, and the first heat exchange chamber and the second heat exchange chamber are connected to a steam device and a gas extraction device.

[0019] Compared with the prior art, the advantages of the present utility model are as follows:

[0020] In the heat exchange device of the present utility model, the material enters from the feed chamber and then flows to the discharge chamber through the material channel. During the process of the material passing through the feed chamber and the material channel, it exchanges heat with the second heat exchange chamber and the first heat exchange chamber. On the one hand, the feed chamber is formed between the first heat exchange chamber and the second heat exchange chamber, and pre-heat exchange is carried out during the process of flowing through the feed chamber. After pre-heat exchange, it further exchanges heat when flowing through the material channel, improving the heat exchange effect; on the other hand, the second heat exchange chamber and the first heat exchange chamber are detachably connected. The second heat exchange tube is arranged in the second heat exchange chamber. By removing the connection between the second heat exchange chamber and the first heat exchange chamber, the second heat exchange tube can be taken out from the first heat exchange tube, realizing the separation of the second heat exchange chamber and the first heat exchange chamber. After the components are separated, it is easier to clean the inside.

[0021] This heat exchange system includes a heat exchange device and has all the advantages of the heat exchange device. Brief Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the heat exchange device of the present utility model.

[0023] Figure 2 is a schematic diagram of the mating structure of the first heat exchange tube and the second heat exchange tube of the heat exchange device of the present utility model.

[0024] Figure 3 is Figure 2 the main sectional structural diagram of

[0025] Figure 4 is Figure 3 the sectional view taken along A-A in

[0026] Figure 5 is a schematic structural diagram of the heat exchange system of the present utility model.

[0027] Each label in the figure represents:

[0028] 1. First heat exchange chamber; 11. First inlet; 12. First outlet; 13. First heat exchange tube; 131. Positioning member; 14. Fourth outlet; 2. Housing; 21. Discharge port; 3. Second heat exchange chamber; 31. Second inlet; 32. Second outlet; 33. Feed port; 34. Third outlet; 4. Feed chamber; 5. Discharge chamber; 6. Second heat exchange tube; 61. Material passage; 7. Through fixing bolts; 8. Gas-liquid separation device; 9. Circulation pump. Specific embodiments

[0029] The following further elaborates on the present utility model in detail in conjunction with the specification drawings and specific embodiments.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise specifically defined.

[0032] In the present utility model, unless otherwise clearly specified and limited, terms such as "assembly", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Embodiment 1:

[0034] Figures 1 to 4An embodiment of the heat exchange device of the present utility model is shown. The heat exchange device of this embodiment includes a first heat exchange chamber 1, a second heat exchange chamber 3, and a discharge chamber 5. The discharge chamber 5 is provided at one end of the first heat exchange chamber 1. The second heat exchange chamber 3 is detachably arranged at the other end of the first heat exchange chamber 1 and forms a feed chamber 4 with the first heat exchange chamber 1. A first heat exchange tube 13 penetrates through the first heat exchange chamber 1. A second heat exchange tube 6 is provided on the second heat exchange chamber 3. One end of the second heat exchange tube 6 is communicated with the inside of the second heat exchange chamber 3 and the other end is blocked. The second heat exchange tube 6 is arranged inside the first heat exchange tube 13 and forms a material channel 61 with the first heat exchange tube 13. The material channel 61 communicates the feed chamber 4 and the discharge chamber 5.

[0035] The material enters from the feed chamber 4 and then flows to the discharge chamber 5 through the material channel 61. During the process of the material passing through the feed chamber 4 and the material channel 61, heat exchange is carried out with the second heat exchange chamber 3 and the first heat exchange chamber 1. On the one hand, the feed chamber 4 is formed between the first heat exchange chamber 1 and the second heat exchange chamber 3, and pre-heat exchange is carried out during the process of flowing through the feed chamber 4. After pre-heat exchange, it flows through the material channel 61 for further heat exchange, improving the heat exchange effect. On the other hand, the second heat exchange chamber 3 is detachably connected to the first heat exchange chamber 1. The second heat exchange tube 6 is arranged in the second heat exchange chamber 3. By removing the connection between the second heat exchange chamber 3 and the first heat exchange chamber 1, the second heat exchange tube 6 can be taken out from the first heat exchange tube 13 to realize the separation of the second heat exchange chamber 3 and the first heat exchange chamber 1. After the components are separated, it is easier to clean the inside.

[0036] Further, in this embodiment, the first heat exchange chamber 1 is provided with a first inlet 11 and a first outlet 12, and the second heat exchange chamber 3 is provided with a second inlet 31 and a second outlet 32. The first inlet 11 and the second inlet 31 are used to fill in the heat exchange medium, and the first outlet 12 and the second outlet 32 are used to evacuate the air.

[0037] Further, in this embodiment, the first inlet 11 and the first outlet 12 are respectively arranged on opposite sides of the first heat exchange chamber 1, and the second inlet 31 and the second outlet 32 are respectively arranged on opposite sides of the second heat exchange chamber 3.

[0038] Further, in this embodiment, the feed chamber 4 is provided with a feed port 33, and the discharge chamber 5 is provided with a discharge port 21. The feed port 33 is used for the material to enter, and the discharge port 21 is used for the material to be discharged.

[0039] Further, in this embodiment, the bottom of the second heat exchange chamber 3 is provided with a third outlet 34, and the bottom of the first heat exchange chamber 1 is provided with a fourth outlet 14. The third outlet 34 is used for discharging the condensed water generated during the heat exchange process in the second heat exchange chamber 3. The fourth outlet 14 is used for discharging the condensed water generated during the heat exchange process in the first heat exchange chamber 1.

[0040] The production process of the heat exchange device is as follows: the first heat exchange chamber 1 and the second heat exchange chamber 3 are evacuated through the first outlet 12 and the second outlet 32; the heat exchange medium (such as steam) is filled into the first heat exchange chamber 1 and the second heat exchange chamber 3 through the first inlet 11 and the second inlet 31; the material enters the feed chamber 4 from the feed inlet 33, and then flows to the discharge chamber 5 through the feed chamber 4 and the material channel 61 in sequence, and the material exchanges heat with the heat exchange medium in the second heat exchange chamber 3 and the first heat exchange chamber 1 during the process of passing through the feed chamber 4 and the material channel 61. Since the material channel 61 is formed between the first heat exchange tube 13 and the second heat exchange tube 6, during heat exchange, the heat exchange medium is present inside and outside the material channel 61, so that the flowing materials in each part of the material channel 61 can exchange heat better, that is, the heat exchange effect on the material in the center of the material channel 61 is improved, and it can be suitable for heat exchange of materials at a higher depth, and the heat exchange in each part of the material channel 61 can be relatively uniform, avoiding scaling of the side wall of the material channel 61.

[0041] Furthermore, in this embodiment, a positioning member 131 is provided between the second heat exchange tube 6 and the first heat exchange tube 13. During the assembly process of the second heat exchange tube 6 being inserted into the first heat exchange tube 13, the positioning member 131 can quickly and accurately position the first heat exchange tube 13, thereby achieving fast and accurate positioning assembly.

[0042] Furthermore, if Figure 3 and Figure 4 As shown, in this embodiment, a positioning member 131 is provided on the inner wall of the first heat exchange tube 13 or the outer wall of the second heat exchange tube 6, and the second heat exchange tube 6 is coaxial with the first heat exchange tube 13. The positioning member 131 can be fixed on the inner wall of the first heat exchange tube 13, or fixed on the outer wall of the second heat exchange tube 6, either of which can be fixed. Due to the positioning function of the positioning member 131, it is beneficial to maintain the coaxial installation and coaxiality of the second heat exchange tube 6 and the first heat exchange tube 13.

[0043] Furthermore, if Figure 1 As shown, in this embodiment, the positioning member 131 is disposed at the end of the first heat exchange tube 13 or the end of the second heat exchange tube 6. The end of the first heat exchange tube 13 and the end of the second heat exchange tube 6 are one end facing the discharge chamber 5 or one end facing the feed chamber 4, or both ends of the first heat exchange tube 13 and the second heat exchange tube 6 are ends.

[0044] Furthermore, in this embodiment, the second heat exchange chamber 3 is fixedly connected to the first heat exchange chamber 1 by means of fixing bolts 7; and / or the shell 2 of the discharge chamber 5 is fixedly connected to the first heat exchange chamber 1 by means of fixing bolts 7. The connection structure is simple and easy to assemble and disassemble.

[0045] Further, in this embodiment, three positioning members 131 can be designed at both ends of the first heat exchange tube 13, and the positioning members 131 are arranged at an angle of 120° to each other inside the first heat exchange tube 13.

[0046] Embodiment 2:

[0047] Figure 5 An embodiment of the heat exchange system of the present invention is shown. The heat exchange system of this embodiment includes a gas-liquid separation device 8, a circulation pump 9, and the heat exchange device of Embodiment 1. The circulation pump 9 connects the discharge end of the gas-liquid separation device 8 to the feed port 33, the discharge chamber 5 is communicated with the feed end of the gas-liquid separation device 8, and the first heat exchange chamber 1 and the second heat exchange chamber 3 are connected to a steam device and a gas extraction device.

[0048] The production process of this heat exchange system: evacuate the first heat exchange chamber 1 and the second heat exchange chamber 3 through the first outlet 12 and the second outlet 32; fill the first heat exchange chamber 1 and the second heat exchange chamber 3 with a heat exchange medium (such as steam) through the first inlet 11 and the second inlet 31; the material enters the feed chamber 4 from the feed port 33, and then flows through the feed chamber 4 and the material channel 61 to the discharge chamber 5 in sequence, and exchanges heat with the heat exchange medium in the second heat exchange chamber 3 and the first heat exchange chamber 1; pump the material into the gas-liquid separation device 8 through the discharge port 21 by the circulation pump 9. The material can form a circulating flow through the feed chamber 4, the feed chamber 4, the material channel 61, the discharge chamber 5, the gas-liquid separation device 8 and the circulation pump 9 in sequence, and is discharged to the gas-liquid separation device 8 through the discharge port 21 for concentration. Then, the material continues to start a new round of circulating concentration through the pipeline. After the material meets the requirements, it becomes a finished product and is discharged from the gas-liquid separation device 8.

[0049] This heat exchange system includes a heat exchange device and has all the advantages of the heat exchange device.

[0050] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A heat exchange device, characterized in that: The invention comprises a first heat exchange chamber (1), a second heat exchange chamber (3) and a discharge chamber (5), wherein the discharge chamber (5) is arranged at one end of the first heat exchange chamber (1), the second heat exchange chamber (3) is detachably arranged at the other end of the first heat exchange chamber (1), and a feed chamber (4) is formed between the second heat exchange chamber (3) and the first heat exchange chamber (1), a first heat exchange tube (13) passes through the first heat exchange chamber (1), a second heat exchange tube (6) is arranged on the second heat exchange chamber (3), one end of the second heat exchange tube (6) is connected to the inside of the second heat exchange chamber (3), and the other end is blocked, the second heat exchange tube (6) is passed through the first heat exchange tube (13), and a material channel (61) is formed between the second heat exchange tube (6) and the first heat exchange tube (13), and the material channel (61) connects the feed chamber (4) and the discharge chamber (5).

2. The heat exchange device according to claim 1, characterized in that: The first heat exchange chamber (1) is provided with a first inlet (11) and a first outlet (12), and the second heat exchange chamber (3) is provided with a second inlet (31) and a second outlet (32).

3. The heat exchange device according to claim 2, characterized in that: The first inlet (11) and the first outlet (12) are respectively arranged on two opposite sides of the first heat exchange chamber (1), and the second inlet (31) and the second outlet (32) are respectively arranged on two opposite sides of the second heat exchange chamber (3).

4. The heat exchange device according to claim 1, characterized in that: The feed chamber (4) is provided with a feed port (33), and the discharge chamber (5) is provided with a discharge port (21).

5. The heat exchange device according to claim 1, characterized in that: The bottom of the second heat exchange chamber (3) is provided with a third outlet (34), and the bottom of the first heat exchange chamber (1) is provided with a fourth outlet (14).

6. The heat exchange device according to claim 1, characterized in that: A positioning member (131) is provided between the second heat exchange tube (6) and the first heat exchange tube (13).

7. The heat exchange device according to claim 6, characterized in that: A positioning piece (131) is provided on the inner wall of the first heat exchange tube (13) or the outer wall of the second heat exchange tube (6), and the second heat exchange tube (6) is coaxial with the first heat exchange tube (13).

8. The heat exchange device according to claim 6, characterized in that: The positioning member (131) is arranged at the end of the first heat exchange tube (13).

9. The heat exchange device according to any one of claims 1 to 8, characterized in that: The second heat exchange chamber (3) is fixedly connected to the first heat exchange chamber (1) via fixing bolts (7); and / or the shell (2) of the discharge chamber (5) is fixedly connected to the first heat exchange chamber (1) via fixing bolts (7).

10. A heat exchange system, characterized in that: It comprises a gas-liquid separation device (8), a circulation pump (9) and a heat exchange device according to any one of claims 1 to 9, wherein the circulation pump (9) connects the discharge end of the gas-liquid separation device (8) and the feed port (33), the discharge chamber (5) is connected to the feed end of the gas-liquid separation device (8), and the first heat exchange chamber (1) and the second heat exchange chamber (3) are connected to a steam device and a vacuum device.

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