Concentration system and concentration method

Abstract

The concentration system comprises a heat exchange outer cavity with a medium inlet and a medium outlet, the concentration system further comprises a gas-liquid separation device and a heat exchange inner cavity arranged in the heat exchange outer cavity in a penetrating mode, a heat exchange flow channel is arranged between the heat exchange inner cavity and the heat exchange outer cavity, and a vacuum opening used for being connected with a vacuumizing mechanism is formed in the heat exchange outer cavity. The heat exchange flow channel and the gas-liquid separation device are communicated to form a circulation loop. The invention also discloses a concentration method which is carried out by adopting the concentration system and comprises the following steps: generating a flowing substance; vacuumizing is conducted; and heat exchange and concentration. The concentration system and method have the advantages that the concentration system and method can be suitable for heat exchange of substances with higher depth, heating of all positions in the heat exchange flow channel can be relatively uniform, and scaling of the side wall of the heat exchange flow channel is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of food and medicine packaging machinery and equipment, and in particular to a concentration system and a concentration method. Background Art

[0002] Shell and tube heat exchangers and concentrators are basic equipment for heat exchange and evaporation in many industries such as traditional Chinese medicine, chemical industry, food, biological fermentation and environmental protection. They are especially indispensable heating equipment for concentrating liquid materials.

[0003] Traditional shell-and-tube heat exchanger equipment is generally composed of a shell, a tube sheet, a tube (heat exchange tube) and a head. The tube runs through the shell, and the material passing through the tube sheet and the medium passing through the shell exchange heat. According to its structural characteristics, two materials of different temperatures pass through the heat exchanger without contacting each other, but can exchange heat. The heat exchange capacity and efficiency are determined by the temperature difference between the inside and outside of the tube, the surface area of ​​the tube (heat exchange area) and the heat transfer coefficient k.

[0004] There are two flow states of liquid in the tube array, namely laminar flow and turbulent flow. Laminar flow: the fluid flow is in layers, the cohesive force plays a leading role, and the liquid particles are constrained by viscosity. Turbulent flow: the fluid flow is mixed, the inertial force plays a leading role, and the restrictive effect of the cohesive force is weakened. When the fluid flows at a low speed in the tube array, it presents laminar flow, and its particles move smoothly in a straight line in a direction parallel to the tube axis. The flow velocity of the fluid is the largest at the center of the tube array and the smallest near the wall. The ratio of the average flow velocity of the fluid in the tube to the maximum flow velocity is equal to 0.5.

[0005] Because of the above reasons, the traditional shell-and-tube heat exchanger only has a good heating effect on the material close to the tube wall, while the heating effect on the material at the midpoint of the tube is limited. If the final concentration of the material to be heated is high, the viscosity of the material also becomes higher, the material flow rate near the tube wall is low, and excessive heat and evaporation easily lead to crystal precipitation and sticking to the tube wall, resulting in scaling. This situation often occurs in the evaporation and concentration of the traditional Chinese medicine industry and the salt chemical industry, causing great trouble. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a concentration system and a concentration method that can be suitable for heat exchange of materials at higher depths, can make the heating at various locations in the heat exchange channel relatively uniform, and avoid scaling of the side walls of the heat exchange channel.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A concentration system comprises a heat exchange outer chamber having a medium inlet and a medium outlet, the concentration system further comprises a gas-liquid separation device and a heat exchange inner chamber penetrating the heat exchange outer chamber, a heat exchange flow channel is arranged between the heat exchange inner chamber and the heat exchange outer chamber, a vacuum port for connecting to a vacuum pumping mechanism is arranged on the heat exchange outer chamber, and the heat exchange flow channel and the gas-liquid separation device are connected to form a circulation loop.

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

[0010] The heat exchange outer cavity is communicated with the heat exchange inner cavity.

[0011] The heat exchange outer cavity is connected to the heat exchange inner cavity via a plurality of connecting channels, and the connecting channels are arranged at intervals along the extension direction of the heat exchange inner cavity.

[0012] The heat exchange inner cavity is a cylindrical cavity.

[0013] The two ends of the heat exchange inner cavity are respectively connected with a feed cavity and a discharge cavity. The feed cavity is provided with a feed inlet, and the discharge cavity is provided with a discharge inlet.

[0014] The feed cavity is detachably connected to the heat exchange outer cavity, and the discharge cavity is detachably connected to the heat exchange outer cavity.

[0015] The cross section of the heat exchange channel is annular.

[0016] A circulation pump is provided on the circulation loop.

[0017] A discharging mechanism is arranged on the pipeline between the heat exchange flow channel and the circulation pump.

[0018] A concentration method, using the above-mentioned concentration system, comprises the following steps:

[0019] S1. Producing flowing substances: Producing flowing substances in the heat exchange flow channel;

[0020] S2, vacuuming: vacuuming the outer heat exchange cavity through the vacuum port;

[0021] S3. Heat exchange concentration: generate flowing medium in the heat exchange outer cavity and the heat exchange inner cavity, exchange heat between the flowing medium and the flowing material in the heat exchange flow channel, and the material is concentrated through the gas-liquid separation device.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] The production process of the concentration system of the present invention is as follows: generating flowing material in the heat exchange flow channel; evacuating the heat exchange outer cavity through the vacuum port; generating flowing medium in the heat exchange outer cavity and the heat exchange inner cavity, the flowing medium and the flowing material in the heat exchange flow channel are heat exchanged, and the material is concentrated through the gas-liquid separation device. Since the heat exchange flow channel is arranged between the heat exchange inner cavity and the heat exchange outer cavity, during heat exchange, both the inside and the outside of the heat exchange flow channel have flowing medium, so that the flowing material in each part of the heat exchange flow channel can exchange heat better, that is, the heating effect on the material in the center of the heat exchange flow channel is improved, and it can be suitable for heat exchange of materials at a higher depth, and the heating of each part in the heat exchange flow channel can be relatively uniform, avoiding scaling of the side wall of the heat exchange flow channel.

[0024] The concentration method of the present invention, firstly, because the heat exchange channel is arranged between the heat exchange inner cavity and the heat exchange outer cavity, during heat exchange, there is flowing medium inside and outside the heat exchange channel, so that the flowing materials in each part of the heat exchange channel can exchange heat better, that is, the heating effect on the material in the center of the heat exchange channel is improved, which can be suitable for heat exchange of materials at a higher depth, and can make the heating of each part of the heat exchange channel relatively uniform, avoiding scaling of the side wall of the heat exchange channel. Secondly, before heat exchange concentration, the heat exchange outer cavity is first evacuated through the vacuum port to avoid impurities in the heat exchange inner cavity and the heat exchange outer cavity, which affect the heat exchange effect of the flowing medium (such as steam), thereby improving the overall heat exchange effect and concentration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main structure of the concentration system of the present invention.

[0026] Figure 2 It is a schematic diagram of the internal structure of the heat exchange outer chamber of the concentration system of the present invention.

[0027] Figure 3 It is a schematic diagram of the side view structure of the heat exchange inner cavity of the concentration system of the present invention.

[0028] Figure 4 It is a schematic diagram of the main cross-sectional structure of the heat exchange inner cavity of the concentration system of the present invention.

[0029] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure of AA.

[0030] The symbols in the figure represent:

[0031] 1. Heat exchange outer cavity; 11. Medium inlet; 12. Medium outlet; 13. Vacuum port; 2. Heat exchange inner cavity; 21. Connecting channel; 3. Heat exchange flow channel; 4. Feed cavity; 41. Feed port; 5. Discharge cavity; 51. Discharge port; 6. Gas-liquid separation device; 7. Circulation pump; 8. Discharge mechanism. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] Embodiment 1:

[0037] Figures 1 to 5 An embodiment of the concentration system of the present invention is shown. The concentration system of this embodiment includes a heat exchange outer chamber 1 with a medium inlet 11 and a medium outlet 12. The concentration system also includes a gas-liquid separation device 6 and a heat exchange inner chamber 2 penetrating the heat exchange outer chamber 1. A heat exchange channel 3 is provided between the heat exchange inner chamber 2 and the heat exchange outer chamber 1. A vacuum port 13 for connecting to a vacuum pumping mechanism is provided on the heat exchange outer chamber 1. The heat exchange channel 3 and the gas-liquid separation device 6 are connected to form a circulation loop.

[0038] The production process of this concentration system is as follows: generating flowing material in the heat exchange channel 3; evacuating the heat exchange outer chamber 1 through the vacuum port 13; generating flowing medium in the heat exchange outer chamber 1 and the heat exchange inner chamber 2, and the flowing medium and the flowing material in the heat exchange channel 3 are heat exchanged, and the material is concentrated through the gas-liquid separation device 6. Since the heat exchange channel 3 is arranged between the heat exchange inner chamber 2 and the heat exchange outer chamber 1, during heat exchange, there is flowing medium both inside and outside the heat exchange channel 3, so that the flowing material in each part of the heat exchange channel 3 can exchange heat better, that is, the heating effect on the material in the center of the heat exchange channel 3 is improved, which can be suitable for heat exchange of materials at a higher depth, and can make the heating of each part in the heat exchange channel 3 relatively uniform, avoiding scaling of the side wall of the heat exchange channel 3.

[0039] Furthermore, if Figures 2 to 5 As shown, in this embodiment, the heat exchange outer cavity 1 is connected to the heat exchange inner cavity 2. In this way, the medium (such as steam) is injected through the medium inlet 11 and can flow into the heat exchange outer cavity 1 and the heat exchange inner cavity 2. It is not necessary to inject the flowing medium into the heat exchange outer cavity 1 and the heat exchange inner cavity 2 at two locations, thereby saving costs.

[0040] Furthermore, in this embodiment, the heat exchange outer cavity 1 is connected to the heat exchange inner cavity 2 via a plurality of connecting channels 21, and the connecting channels 21 are arranged at intervals along the extension direction of the heat exchange inner cavity 2. This facilitates the formation of a flowing medium in the heat exchange outer cavity 1 and the heat exchange inner cavity 2, thereby improving the heat exchange effect.

[0041] Furthermore, in this embodiment, the heat exchange inner cavity 2 is a cylindrical cavity. Of course, in other embodiments, the heat exchange inner cavity 2 can also be an S-shaped cavity, a Z-shaped cavity or a cavity of other shapes, as long as it can adapt to the spatial arrangement of the heat exchange outer cavity 1 and achieve a good heat exchange effect.

[0042] Furthermore, in this embodiment, the two ends of the heat exchange inner cavity 2 are respectively connected with a feed cavity 4 and a discharge cavity 5, the feed cavity 4 is provided with a feed port 41, and the discharge cavity 5 is provided with a discharge port 51, so as to facilitate feeding and discharging.

[0043] Furthermore, in this embodiment, the feed chamber 4 is detachably connected to the heat exchange outer chamber 1, and the discharge chamber 5 is detachably connected to the heat exchange outer chamber 1, so as to facilitate disassembly and assembly. For example, the side wall of the feed chamber 4 is connected to the heat exchange outer chamber 1 by bolts, and the side wall of the discharge chamber 5 is connected to the heat exchange outer chamber 1 by bolts.

[0044] Furthermore, in this embodiment, the cross section of the heat exchange channel 3 is annular, which improves the uniformity of heat exchange inside and outside the heat exchange channel 3, further improves the heating effect of the center of the heat exchange channel 3, and further avoids excessive heating and evaporation of materials near the wall of the heat exchange channel 3 to cause scaling.

[0045] Furthermore, in this embodiment, a circulation pump 7 is provided on the circulation loop to facilitate the circulation of the material in the circulation loop and improve the concentration efficiency.

[0046] Furthermore, in this embodiment, a discharge mechanism 8 is provided on the pipeline between the heat exchange flow channel 3 and the circulation pump 7, so as to facilitate the discharge of hawthorn materials and cleaning.

[0047] Embodiment 2:

[0048] A concentration method, using the concentration system of embodiment 1, comprises the following steps:

[0049] S1, generating flowing material: generating flowing material in the heat exchange flow channel 3;

[0050] S2, vacuuming: vacuuming the heat exchange outer chamber 1 through the vacuum port 13;

[0051] S3, heat exchange concentration: a flowing medium is generated in the heat exchange outer cavity 1 and the heat exchange inner cavity 2, the flowing medium exchanges heat with the flowing material in the heat exchange flow channel 3, and the material is concentrated through the gas-liquid separation device 6.

[0052] First, since the heat exchange channel 3 is arranged between the heat exchange inner cavity 2 and the heat exchange outer cavity 1, during heat exchange, there is flowing medium inside and outside the heat exchange channel 3, so that the flowing materials in each part of the heat exchange channel 3 can exchange heat better, that is, the heating effect on the central material of the heat exchange channel 3 is improved, which can be suitable for heat exchange of materials at a higher depth, and can make the heating of each part of the heat exchange channel 3 relatively uniform, avoiding scaling of the side wall of the heat exchange channel 3. Secondly, before heat exchange concentration, the heat exchange outer cavity 1 is first evacuated through the vacuum port 13 to avoid impurities in the heat exchange inner cavity 2 and the heat exchange outer cavity 1, affecting the heat exchange effect of the flowing medium (such as steam), thereby improving the overall heat exchange effect and concentration efficiency.

[0053] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. 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 should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A concentration system, comprising a heat exchange outer chamber (1) having a medium inlet (11) and a medium outlet (12), characterized in that: The concentration system further comprises a gas-liquid separation device (6) and a heat exchange inner cavity (2) penetrating the heat exchange outer cavity (1); a heat exchange flow channel (3) is provided between the heat exchange inner cavity (2) and the heat exchange outer cavity (1); a vacuum port (13) for connecting to a vacuum pumping mechanism is provided on the heat exchange outer cavity (1); the heat exchange flow channel (3) and the gas-liquid separation device (6) are connected to form a circulation loop.

2. The concentration system according to claim 1, characterized in that: The heat exchange outer cavity (1) is communicated with the heat exchange inner cavity (2).

3. The concentration system according to claim 1, characterized in that: The heat exchange outer cavity (1) and the heat exchange inner cavity (2) are connected via a plurality of connecting channels (21), and the connecting channels (21) are arranged at intervals along the extension direction of the heat exchange inner cavity (2).

4. The concentration system according to claim 1, characterized in that: The heat exchange inner cavity (2) is a cylindrical cavity.

5. The concentration system according to claim 1, characterized in that: The two ends of the heat exchange inner cavity (2) are respectively connected to a feed cavity (4) and a discharge cavity (5); the feed cavity (4) is provided with a feed port (41), and the discharge cavity (5) is provided with a discharge port (51).

6. The concentration system according to claim 5, characterized in that: The feed chamber (4) is detachably connected to the heat exchange outer chamber (1), and the discharge chamber (5) is detachably connected to the heat exchange outer chamber (1).

7. The concentrating system according to any one of claims 1 to 6, characterized in that: The cross section of the heat exchange channel (3) is annular.

8. The concentrating system according to any one of claims 1 to 6, characterized in that: A circulation pump (7) is provided on the circulation loop.

9. The concentration system according to claim 8, characterized in that: A discharge mechanism (8) is provided on the pipeline between the heat exchange flow channel (3) and the circulation pump (7).

10. A concentration method, characterized in that: The method is carried out using the concentration system according to any one of claims 1 to 7, comprising the following steps: S1, generating flowing material: generating flowing material in the heat exchange flow channel (3); S2, evacuating: evacuating the heat exchange outer chamber (1) through the vacuum port (13); S3, heat exchange concentration: a flowing medium is generated in the heat exchange outer cavity (1) and the heat exchange inner cavity (2), the flowing medium and the flowing material in the heat exchange flow channel (3) are heat exchanged, and the material is concentrated through the gas-liquid separation device (6).

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