Tube bundle type heat exchanger for natto probiotics

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a tube bundle type heat exchanger for natto probiotics, which comprises a shell, sleeves are arranged in the shell, a U-shaped tube, a feed port and a discharge port are arranged on the outer side of the shell, connecting tubes are arranged between the sleeves, the sleeves are communicated through the connecting tubes, tube bundles are arranged in the sleeves, and the tube bundles are connected with the U-shaped tube. The tube bundles are communicated through U-shaped tubes, the feeding port and the discharging port are both communicated with the tube bundles, each tube bundle comprises seven parallel heat exchange tubes and tube plates, the tube plates are fixedly connected to the two ends of the heat exchange tubes and fixedly connected with the side wall of the shell, the inner diameter of each heat exchange tube is 20 mm, and the inner wall of each heat exchange tube is a polished surface. According to the device, the heat exchange efficiency and the production capacity are improved, the cleanliness and the maintainability of the device are enhanced, and the device has important application value in the production process of natto probiotics.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a tube bundle heat exchanger for natto probiotics. Background Art

[0002] Heat exchangers play an important role in dairy production, but during heating, protease aggregation (protein denaturation) may form in heat exchangers, which will gradually slow down the heat transfer rate and may affect the flavor of the product.

[0003] Therefore, people have considered different solutions. In the existing technology, one method is to use external heating, including plate heat exchangers, tube heat exchangers and shell-and-tube heat exchangers. Although the plate heat exchanger has high heat transfer efficiency, due to its thin layer structure, the material channel is prone to solidification problems, especially when the heat transfer speed is too fast.

[0004] Therefore, dairy companies generally tend to use tubular heat exchangers with an inner diameter of 50 mm, such as the shell-and-tube heat exchanger, published as CN2628980Y. These include an outer insulation layer and a heat-conducting medium coil. The outer insulation layer houses a heat-conducting medium coil, which consists of an inner tube connected by an elbow. A sleeve is provided on the outside of the inner tube, and a sleeve connecting pipe is provided between the sleeves. Because its internal structure allows liquid to flow at an extremely fast speed, this helps to avoid protein denaturation. However, the tubular heat exchanger consists of an inner tube and an outer tube. The inner tube usually uses steam, and the outer tube serves as an interlayer. This design has a very small heat exchange area and a large equipment volume.

[0005] In addition, there is a shell-and-tube heat exchanger, which has a larger heat exchange area, but the liquid flow rate may be slowed down. This is because multiple small tubes are gathered together, which limits the flow rate. For example, under normal circumstances, the flow rate of a 60 mm diameter pipe should be 3 to 5 meters per second, but in a shell-and-tube heat exchanger, the flow rate may drop to a few tenths of a meter per second, which may cause protein denaturation. Utility Model Content

[0006] In order to solve the above-mentioned technical problems or one of the technical problems existing in the prior art, the utility model discloses a tube bundle heat exchanger for natto probiotics, comprising a shell, a sleeve is provided inside the shell, a U-shaped tube, a feed port and a discharge port are provided on the outside of the shell, a connecting tube is provided between the sleeves, and the sleeves are connected through the connecting tube, a tube bundle is provided inside the sleeve, the tube bundles are connected through the U-shaped tube, the feed port and the discharge port are both connected to the tube bundle, the tube bundle includes 7 parallel heat exchange tubes and tube sheets, the tube sheets are fixedly connected to both ends of the heat exchange tubes and to the side wall of the shell, the inner diameter of the heat exchange tube is 20 mm, and the inner wall of the heat exchange tube is a polished surface.

[0007] Furthermore, there are no less than three sleeves and tube bundles, which are arranged in parallel from top to bottom, wherein one end of the top tube bundle is connected to one end of the lower tube bundle through a U-shaped tube, and the other end is connected to the discharge port; one end of the bottom tube bundle is connected to the feed port, and the other end is connected to one end of the upper tube bundle through a U-shaped tube; both ends of the tube bundle located between the top and the bottom are connected through a U-shaped tube.

[0008] Furthermore, an air inlet pipe communicating with the sleeve is provided above the sleeve at the top.

[0009] Furthermore, the air inlet pipe is arranged at one end of the discharge port.

[0010] Furthermore, an air vent pipe communicating with the sleeve at the bottom is provided below the sleeve, and an air vent valve is provided at the air outlet end of the air vent pipe.

[0011] Furthermore, the air vent pipe is arranged at one end of the feed inlet.

[0012] Furthermore, the seven heat exchange tubes are arranged in a centrally symmetrical manner.

[0013] Compared with the existing technology, the utility model sets 7 parallel heat exchange tubes to ensure the flow rate of the liquid while greatly improving the heat exchange area. This not only improves the thermal efficiency, but also means that under the same working conditions, more raw materials can be processed, thereby improving production efficiency.

[0014] Secondly, the polished surface inside the heat exchange tube not only reduces the adhesion of microorganisms on the tube wall and reduces the risk of protein coagulation, but also facilitates cleaning and maintenance, ensuring the long-term use and sanitary safety of the heat exchanger. This polishing process is particularly important for the food industry because it helps maintain product quality and reduces the possibility of microbial contamination.

[0015] In the existing technology, the outer diameter of the main pipe is usually 54mm and the inner diameter is 50mm; the cross-sectional area is: πR²=3.14x0.025²=0.0020㎡; the heat exchange area is: πDL=3.14x0.054X4.5=0.763㎡;

[0016] The present invention adopts 7 rows of pipes with an outer diameter of 24mm and an inner diameter of 20mm; the cross-sectional area is: 7πR²=7x3.14x0.01²=0.0022㎡; the heat exchange area is: 7πDL=7x3.14x0.024x4.5=2.37㎡; therefore, the cross-sectional area of the row of pipes is 90% of the main pipe in the existing technology, and the flow rate remains basically unchanged; the heat exchange area is increased to 3.11 times that of the main pipe in the existing technology.

[0017] In summary, the utility model not only improves the heat exchange efficiency and production capacity, but also enhances the cleanliness and maintainability of the equipment, and has important application value for the production process of natto probiotics. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the tube plate of the present invention. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] See also Figure 1 、 2 The technical solution adopted by the utility model shown is: a tube bundle heat exchanger for natto probiotics, comprising a shell 1, a sleeve 2 is provided inside the shell 1, and a U-shaped tube 9, a discharge port 10 and a feed port 11 are provided on the outside. A connecting pipe 6 is provided between the sleeves 2 and connected through the connecting pipe 6. A tube bundle is provided inside the sleeve 2, and the tube bundles are connected through the U-shaped tube 9. The discharge port 10 and the feed port 11 are both connected to the tube bundle. The tube bundle includes 7 parallel heat exchange tubes 7 and a tube sheet 8. The tube sheet 8 is fixed to both ends of the heat exchange tube 7 and to the side wall of the shell 1. The inner diameter of the heat exchange tube 7 is 20 mm, and the inner wall of the heat exchange tube 7 is a polished surface.

[0022] Preferably, the sleeves 2 and the tube bundles are no less than 3 in number and are arranged in parallel from top to bottom, making full use of the internal space of the heat exchanger, increasing the heat exchange area, and thus improving the heat exchange efficiency. Among them, one end of the top tube bundle is connected to one end of the lower tube bundle through the U-shaped tube 9, and the other end is connected to the discharge port 10. One end of the bottom tube bundle is connected to the feed port 11, and the other end is connected to one end of the upper tube bundle through the U-shaped tube 9. Both ends of the tube bundle located between the top and bottom are connected through the U-shaped tube 9, realizing fluid communication between the tube bundles, so that the material can directly enter the bottom tube bundle of the heat exchanger.

[0023] Preferably, an air inlet pipe communicating with the sleeve 2 at the top is provided above the sleeve 2 so that steam can enter the sleeve from the air inlet pipe.

[0024] Preferably, the air inlet pipe 3 is provided at one end of the discharge port 10, so that the input position of the gas can be controlled more accurately and the heat exchange efficiency can be improved.

[0025] Preferably, an air vent pipe 4 connected to the sleeve 2 at the bottom is provided, and an air vent valve 5 is provided at the air outlet end of the air vent pipe 4. The air vent valve 5 can effectively remove the gas inside the heat exchanger to prevent gas accumulation from affecting the heat exchange efficiency. The adjustment function of the air vent valve 5 allows the operator to adjust the gas discharge according to actual conditions to ensure the stability of the internal environment of the heat exchanger.

[0026] Preferably, the air vent pipe 4 is provided at one end of the feed port 11 .

[0027] Preferably, the seven heat exchange tubes 7 are arranged in a centrally symmetrical manner, which helps to achieve uniform distribution and flow of materials inside the heat exchanger. This symmetrical design helps to improve heat exchange efficiency, while reducing the flow resistance of the fluid inside the heat exchanger and reducing energy consumption.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tube bundle heat exchanger for natto probiotics, comprising a shell (1), characterized in that: The shell (1) is provided with a sleeve (2) inside, and a U-shaped tube (9), a feed port (11) and a discharge port (10) outside. A connecting tube (6) is provided between the sleeves (2) and is communicated through the connecting tube (6). A tube bundle is provided inside the sleeve (2), and the tube bundles are communicated through the U-shaped tube (9). The feed port (11) and the discharge port (10) are both communicated with the tube bundle. The tube bundle includes 7 parallel heat exchange tubes (7) and a tube sheet (8). The tube sheet (8) is fixed to both ends of the heat exchange tube (7) and fixed to the side wall of the shell (1). The inner diameter of the heat exchange tube (7) is 20 mm, and the inner wall of the heat exchange tube (7) is a polished surface.

2. The tube bundle heat exchanger for natto probiotics according to claim 1, characterized in that: The sleeves (2) and tube bundles are each at least three in number and are arranged in parallel from top to bottom, wherein one end of the top tube bundle is connected to one end of the lower tube bundle via a U-shaped tube (9), and the other end is connected to the discharge port (10); one end of the bottom tube bundle is connected to the feed port (11), and the other end is connected to one end of the upper tube bundle via a U-shaped tube (9); and both ends of the tube bundle located between the top and bottom are connected via the U-shaped tube (9).

3. The tube bundle heat exchanger for natto probiotics according to claim 2, characterized in that: An air inlet pipe in communication with the sleeve (2) is provided above the sleeve (2) located at the top.

4. The tube bundle heat exchanger for natto probiotics according to claim 3, characterized in that: The air inlet pipe (3) is provided at one end of the discharge port (10).

5. The tube bundle heat exchanger for natto probiotics according to claim 2, characterized in that: An air vent pipe (4) in communication with the sleeve (2) is provided below the sleeve (2) at the bottom, and an air vent valve (5) is provided at the air outlet end of the air vent pipe (4).

6. The tube bundle heat exchanger for natto probiotics according to claim 5, characterized in that: The air vent pipe (4) is provided at one end of the feed port (11).

7. The tube bundle heat exchanger for natto probiotics according to claim 1, characterized in that: The seven heat exchange tubes (7) are arranged in a centrally symmetrical manner.

Images