A centrifugal thin-film distillation system

Abstract

The present invention relates to a centrifugal thin-film distillation system. It mainly solves the technical problems existing in the existing distillation system, such as poor fluidity, short flow distance, a large amount of products remaining in the equipment, long processing time, and low recovery efficiency. It includes a pre-fragrance feed pipe, a post-fragrance feed pipe, a steam inlet pipe, a buffer tank, and a distillation column, and also includes a fixed cone, a rotating cone, and discs. The rotating cones are distributed at intervals along the axial direction of the rotating shaft. The lower end of the rotating cone is a closed structure. The lower end of the fixed cone is provided with an opening. The fixed cone and the rotating cone are axially cross-distributed and there is a certain gap between them, and the uppermost one is the rotating cone and corresponds to the material discharge port of the material conveying pipe. This centrifugal thin-film distillation system uses a centrifugal structure to achieve aroma extraction. The flowing thin film extends the product flow distance. There is very little product remaining in the equipment, the processing time is short, it can process high-viscosity products, and the aroma recovery efficiency is high. It has the advantages of good fluidity, low pressure drop, low temperature, and long product flow distance.

Description

Technical Field

[0001] The present invention relates to a centrifugal thin-film distillation system. Background Art

[0002] With the change of people's consumption concepts, considering the safety of chemical synthetic substances and environmental issues, the usage of chemical synthetic fragrances has gradually decreased, while the application of natural fragrances has become increasingly widespread. Natural fragrances are increasingly favored by people for their characteristics such as being green, safe, and environmentally friendly. The global output of natural fragrances is increasing at a rate of 10-15% per year. China is rich in plant-based natural fragrance resources, with more than 500 aromatic plants widely distributed in 20 provinces and cities. However, due to the backward extraction and processing technology, only part of the fragrance resources have been developed and utilized. Many plant-based natural fragrances can only be preliminarily extracted, and both the yield and purity are relatively low. Even some products are transported abroad for deep processing. This not only leads to a shortage of plant-based natural fragrances in the Chinese market but also seriously wastes China's precious resources.

[0003] And aroma is a decisive factor in judging whether a food is delicious and popular among consumers. Before considering eating a certain food, consumers will always involuntarily smell it. If the aroma is good, they will immediately have the desire to eat it, while a bad aroma will kill their appetite. Food research and developers strive to imitate the aromas of some successfully developed foods, those that occur naturally during food processing, or the aromas of fresh and ripe fruits and plants as a reference for developing a new product. Therefore, the quality of the aroma of a food directly determines its popularity in the market.

[0004] Traditional extraction methods for natural fragrances include squeezing and grinding methods, steam distillation methods, volatile solvent extraction methods, adsorption methods, etc. Especially for the steam distillation method, when extracting the aroma, the fluidity of the material is poor, the flow distance of the product is short, the remaining material in the equipment is much, the processing time is long, especially when dealing with high-viscosity products, the difficulty is relatively large, resulting in a low aroma recovery efficiency. This affects the production efficiency and processing quality and increases the cost. Summary of the Invention

[0005] In order to overcome the disadvantages and deficiencies of the background art, the present invention provides a centrifugal thin-film distillation system to solve the technical problems existing in the existing distillation system, such as poor fluidity, short flow distance, a large amount of remaining product in the equipment, long processing time, and low recovery efficiency.

[0006] The technical solution of the present invention is: a centrifugal thin-film distillation system, including a pre-titration feed pipe, a post-titration feed pipe, a steam inlet pipe, a buffer tank and a distillation column. The pre-titration feed pipe is connected to the buffer tank. The buffer tank is connected to the upper end of the distillation column through a material conveying pipe. The steam inlet pipe is connected to the lower part of the distillation column. The material discharge port of the material conveying pipe extends into the upper end of the distillation column. It also includes a centrifugal mechanism and a power mechanism. The power mechanism includes a motor and a rotating shaft. The motor drives the rotating shaft to rotate. The centrifugal mechanism includes a fixed cone, a rotating cone and a disc. The rotating cones are arranged at intervals along the axial direction of the rotating shaft. The fixed cones are fixedly distributed at intervals in the vertical direction on the inner wall of the distillation column. The rotating shaft is located at the center of the distillation column. The lower end of the rotating cone is a closed structure. The lower end of the fixed cone is provided with an opening. The fixed cone and the rotating cone are axially cross-distributed and there is a certain gap between them. The uppermost one is a rotating cone and corresponds to the material discharge port of the material conveying pipe. The lowermost one is a fixed cone. The discs are arranged on the outer surface of the rotating cone. The material flows along the inner wall of the fixed cone through the opening and into the next rotating cone. The rotating cone rotates to drive the material to flow upward along the inner wall of the rotating cone and into the next fixed cone. The steam flows upward along the fixed cone and the rotating cone and takes away the aroma of the material through the discs.

[0007] It also includes a heat exchange device. The heat exchange device includes a secondary steam generator, a heat recovery heat exchanger and a cooling heat exchanger. The steam inlet pipe leads to the secondary steam generator. The lower end of the secondary steam generator is connected to the upper end of the buffer tank. The upper end of the secondary steam generator is connected to the lower end of the distillation column through a secondary steam inlet pipe. One end of the heat recovery heat exchanger is connected to the lower end of the buffer tank, and the other end is connected to the upper part of the distillation column through a material conveying pipe. A material discharge pipe is connected to the lower end of the distillation column. The material discharge pipe is connected to the heat recovery heat exchanger. And the heat recovery heat exchanger is connected to the post-titration feed pipe through the cooling heat exchanger.

[0008] It also includes a cooling water inlet pipe and a cooling water return pipe. The cooling water inlet pipe and the cooling water return pipe are respectively connected to the cooling heat exchanger. A heating heat exchanger is arranged on the material conveying pipe. The heating heat exchanger is communicated with the secondary steam generator. A liquid level gauge is connected to the secondary steam generator. A pressure sensor is connected to the secondary steam generator.

[0009] It includes a steam discharge pipe, a primary condenser, a secondary condenser, an aroma condensate tank A, and an aroma condensate tank B. The steam discharge pipe is connected to a distillation column. The primary condenser includes a primary condenser A and a primary condenser B. The secondary condenser includes a secondary condenser A and a secondary condenser B. The primary condenser A is respectively connected to a cooling water inlet pipe and a cooling water return pipe. The secondary condenser A is respectively connected to a cooling water inlet pipe and a cooling water return pipe. The primary condenser A is connected to the primary condenser B, and the primary condenser A and the primary condenser B are respectively connected to the aroma condensate tank A. The secondary condenser A is connected to the primary condenser A. The secondary condenser B is connected to the secondary condenser A. The aroma condensate tank B is respectively connected to the secondary condenser A and the secondary condenser B. The aroma condensate tank A is connected to an aroma primary condensate liquid pipe, and the aroma condensate tank B is connected to an aroma secondary condensate liquid pipe.

[0010] The aroma condensate tank A is connected with a liquid level gauge A, and the aroma condensate tank B is connected with a liquid level gauge B. The secondary condenser B and the aroma condensate tank B are connected with a temperature sensor and a cyclone separator. The primary condenser A, the primary condenser B, the secondary condenser A, and the secondary condenser B are all connected with temperature sensors.

[0011] The present invention has the following beneficial effects: This centrifugal thin-film distillation system uses a centrifugal structure to achieve aroma extraction. The flowing thin film extends the product flow distance. There is very little remaining product in the equipment, the processing time is short, it can process high-viscosity products, and the aroma recovery efficiency is high. It has the advantages of good fluidity, low pressure drop, low temperature, and long product flow distance. Description of the Drawings

[0012] Figure 1 It is a structural schematic diagram of the present invention.

[0013] Figure 2 It is a structural schematic diagram of the present invention.

[0014] Figure 3 It is a partial structural schematic diagram of the present invention.

[0015] In the figure, there are a front Titian material pipe 1, a rear Titian material pipe 2, a steam inlet pipe 3, a buffer tank 4, a distillation column 5, a material transfer pipe 6, a material discharge port 7, a motor 8, a rotating shaft 9, a fixed cone 10, a rotating cone 11, an opening 12, a gap 13, a secondary steam generator 14, a heat recovery heat exchanger 15, a cooling heat exchanger 16, a secondary steam inlet pipe 17, a material discharge pipe 18, a cooling water inlet pipe 19, a cooling water return pipe 20, a heating heat exchanger 21, a liquid level gauge 22, a pressure sensor 23, a steam discharge pipe 24, an aroma condensation tank A 25, an aroma condensation tank B 26, a primary condenser A 27, a primary condenser B 28, a secondary condenser A 29, a secondary condenser B 30, an aroma primary condensate pipe 31, a secondary aroma condensate pipe 32, a liquid level gauge A 33, a liquid level gauge B 34, a temperature sensor 35, and a cyclone separator 36. Detailed implementation mode

[0016] The following further describes the embodiments of the present invention with reference to the accompanying drawings:

[0017] A centrifugal thin-film distillation system includes a pre-titration feed pipe 1, a post-titration feed pipe 2, a steam inlet pipe 3, a buffer tank 4, and a distillation column 5. The pre-titration feed pipe 1 is connected to the buffer tank 4. The buffer tank 4 is connected to the upper end of the distillation column 5 through a material conveying pipe 6. The steam inlet pipe 3 is connected to the lower part of the distillation column 5. The material discharge port 7 of the material conveying pipe 6 extends into the upper end of the distillation column 5. It also includes a centrifugal mechanism and a power mechanism. The power mechanism includes a motor 8 and a rotating shaft 9. The motor 8 drives the rotating shaft 9 to rotate. The centrifugal mechanism includes a fixed cone 10, a rotating cone 11, and disc plates, which are located inside the distillation column 5. The rotating cones 11 are spaced along the axial direction of the rotating shaft 9. The fixed cones 10 are fixedly distributed at intervals in the vertical direction on the inner wall of the distillation column 5. The rotating shaft 9 is located at the center of the distillation column 5. The lower end of the rotating cone 11 is a closed structure. The lower end of the fixed cone 10 is provided with an opening 12. The fixed cone 10 and the rotating cone 11 are axially cross-distributed and there is a certain gap 13 between them. The uppermost one is the rotating cone 11, which corresponds to the material discharge port 7 of the material conveying pipe 6. The lowermost one is the fixed cone 10. The disc plates are arranged on the outer surface of the rotating cone 11. The material flows along the inner wall of the fixed cone 10 through the opening 12 and into the next rotating cone 11. The rotating cone 11 rotates to drive the material to flow upward along the inner wall of the rotating cone 11 and flow into the next fixed cone 10. The steam flows upward through the gap 13 between the fixed cone 10 and the rotating cone 11 and takes away the aroma of the material through the disc plates. When in use, the material enters from the rotating cone at the uppermost material discharge port. The material in this rotating cone flows to the fixed cone below it and flows along the edge of the fixed cone into the rotating cone below it under the action of gravity. Since the rotating cone rotates driven by the rotating shaft, under the action of centrifugal force, the material will flow upward along the inner edge of the rotating cone and then flow into the next fixed cone. The steam enters from the opening of the lowermost fixed cone and flows upward through the gap between the fixed cone and the rotating cone. The material also flows downward through this gap. Therefore, the steam can drive the aroma of the material to flow upward. The disc plates are arranged on the lower surface of the rotating cone. Under the guiding action of the disc plates, the steam flows through between the disc plates and the material, and then the extraction purpose is achieved. According to the above scheme, this centrifugal thin-film distillation system uses a centrifugal structure to achieve aroma extraction. The flowing thin film extends the product flow distance. There is very little product remaining in the equipment. The processing time is short. It can process high-viscosity products. The aroma recovery efficiency is high. It has the advantages of good fluidity, low pressure drop, low temperature, and long product flow distance.

[0018] In the present invention, a heat exchange device is further included. The heat exchange device includes a secondary steam generator 14, a heat recovery heat exchanger 15, and a temperature reduction heat exchanger 16. The steam inlet pipe 3 leads into the secondary steam generator 14. The lower end of the secondary steam generator 14 is connected to the upper end of the buffer tank 4. The upper end of the secondary steam generator 14 is connected to the lower end of the distillation column 5 through a secondary steam inlet pipe 17. The heat recovery heat exchanger 15 is connected to the lower end of the buffer tank 4. A material discharge pipe 18 is connected to the lower end of the distillation column 5. The material discharge pipe 18 is connected to the heat recovery heat exchanger 15. The heat recovery heat exchanger 15 is connected to the post-titration material pipe 2 through the temperature reduction heat exchanger 16. The steam inlet pipe leading into the secondary steam generator can heat the secondary steam generator to generate secondary steam. The generated steam enters the buffer tank and the distillation column for use as required. The post-titration material enters the heat recovery heat exchanger for heat exchange with the material entering before titration. This centrifugal thin-film distillation system adopts a heat exchange design with good heat exchange effect, which can effectively and reasonably utilize resources, save energy, reduce costs, and effectively improve production quality.

[0019] In the present invention, a cooling water inlet pipe 19 and a cooling water return pipe 20 are further included. The cooling water inlet pipe 19 and the cooling water return pipe 20 are respectively connected to the temperature reduction heat exchanger 16. A temperature increase heat exchanger 21 is provided on the material conveying pipe 6. The temperature increase heat exchanger 21 is communicated with the secondary steam generator 14. The secondary steam generator 14 is connected with a liquid level gauge 22. A pressure sensor 23 is connected to the secondary steam generator 14. The cooling water inlet pipe and the cooling water return pipe are respectively connected to the temperature reduction heat exchanger. The post-titration material first undergoes heat exchange in the heat recovery heat exchanger and then enters the temperature reduction heat exchanger. Since the temperature reduction heat exchanger is connected to the cooling pipe, the temperature can be reduced through heat exchange in the temperature reduction heat exchanger and discharged from the post-titration material pipe. The heat exchange effect is good and the cooling effect is good.

[0020] In the present invention, it includes a steam discharge pipe 24, a primary condenser, a secondary condenser, an aroma condensation tank A 25, and an aroma condensation tank B 26. The steam discharge pipe 24 is connected to the distillation column 5. The primary condenser includes a primary condenser A 27 and a primary condenser B 28. The secondary condenser includes a secondary condenser A 29 and a secondary condenser B 30. The primary condenser A 27 is respectively connected to a cooling water inlet pipe 19 and a cooling water return pipe 20. The secondary condenser A 29 is respectively connected to the cooling water inlet pipe 19 and the cooling water return pipe 20. The primary condenser A 27 is connected to the primary condenser B 28, and the primary condenser A 27 and the primary condenser B 28 are respectively connected to the aroma condensation tank A 31. The secondary condenser A 29 is connected to the primary condenser A 27. The secondary condenser B 30 is connected to the secondary condenser A 29. The aroma condensation tank B 6 is respectively connected to the secondary condenser A 29 and the secondary condenser B 30. The aroma condensation tank A 25 is connected to an aroma primary condensate pipe 31, and the aroma condensation tank B 26 is connected to an aroma secondary condensate pipe 32. According to the above solution, during the processing, after the material is distilled in the distillation column, its aroma is carried out by the steam and then enters the condensation device, successively passing through the primary condenser and the secondary condenser and entering the aroma condensation tank A and the aroma condensation tank B respectively, and then discharged from the aroma primary condensate pipe and the aroma secondary condensate pipe respectively. This condensation device uses a combination of multi-stage condensers for sequential condensation, with good condensation effect and high utilization rate, thus effectively improving the product quality and ensuring the production efficiency and product quality.

[0021] In the present invention, the aroma condensation tank A 25 is connected with a liquid level gauge A 33, and the aroma condensation tank B 26 is connected with a liquid level gauge B 34. The secondary condenser B 30 and the aroma condensation tank B 26 are connected with a temperature sensor 35 and a cyclone separator 36. The primary condenser A 27, the primary condenser B 28, the secondary condenser A 29, and the secondary condenser B 30 are all connected with a temperature sensor 35. By being connected to the primary condenser A and the secondary condenser A through a steam pipe, the steam can be condensed, with rich functions and enhanced utilization rate. Liquid level gauges are connected to the aroma condensation tank A and the aroma condensation tank B to detect the liquid level of the aroma condensation tank for subsequent operations, achieving an overall automated effect. By connecting the temperature sensor to the secondary condenser B, its temperature can be detected, and the cyclone separator connection can separate the steam condensed by the secondary condenser B and then enter the aroma condensation tank, with good separation effect. In addition, the primary condenser A, the primary condenser B, the secondary condenser A, and the secondary condenser B are all connected with a temperature sensor, and their temperatures can be detected.

[0022] The technical content to be protected by the present invention is not limited to the technical solution provided in this embodiment. Any technical solution inspired by this embodiment falls within the protection scope of the present invention.

Claims

1. A centrifugal thin film distillation system, comprising a pre-titian feed pipe (1), a post-titian feed pipe (2), a steam inlet pipe (3), a buffer tank (4) and a distillation column (5), wherein the pre-titian feed pipe (1) is connected to the buffer tank (4), and is characterized in that: The buffer tank (4) is connected to the upper end of the distillation column (5) through a material conveying pipe (6). The steam inlet pipe (3) is connected to the lower part of the distillation column (5). The material discharge port (7) of the material conveying pipe (6) extends into the upper end of the distillation column (5). It further includes a centrifugal mechanism and a power mechanism. The power mechanism includes a motor (8) and a rotating shaft (9). The motor (8) drives the rotating shaft (9) to rotate. The centrifugal mechanism includes a fixed cone (10), a rotating cone (11) and disc plates and is located inside the distillation column (5). The rotating cones (11) are spaced along the axial direction of the rotating shaft (9). The fixed cones (10) are fixedly distributed at intervals in the vertical direction on the inner wall of the distillation column (5). The rotating shaft (9) is located at the center of the distillation column (5). The lower end of the rotating cone (11) is a closed structure. The lower end of the fixed cone (10) is provided with an opening (12), and the fixed cone (10) and the rotating cone (11) are axially cross-distributed and there is a certain gap (13) between them. The uppermost one is the rotating cone (11) and corresponds to the material discharge port (7) of the material conveying pipe (6). The lowermost one is the fixed cone (10). The disc plates are arranged on the outer surface of the rotating cone (11). The material flows along the inner wall of the fixed cone (10) through the opening (12) and into the next rotating cone (11). The rotating cone (11) rotates to drive the material to flow upward along the inner wall of the rotating cone (11) and flow to the next fixed cone (10). The steam flows upward through the gap (13) between the fixed cone (10) and the rotating cone (11) and takes away the aroma of the material through the disc plates; It further includes a heat exchange device. The heat exchange device includes a secondary steam generator (14), a heat recovery heat exchanger (15) and a temperature reduction heat exchanger (16). The steam inlet pipe (3) leads into the secondary steam generator (14). The lower end of the secondary steam generator (14) is connected to the upper end of the buffer tank (4). The upper end of the secondary steam generator (14) is connected to the lower end of the distillation column (5) through a secondary steam inlet pipe (17). The heat recovery heat exchanger (15) is connected to the lower end of the buffer tank (4). A material discharge pipe (18) is connected to the lower end of the distillation column (5). The material discharge pipe (18) is connected to the heat recovery heat exchanger (15). The heat recovery heat exchanger (15) is connected to the flavor-enhanced material pipe (2) through the temperature reduction heat exchanger (16); It further includes a cooling water inlet pipe (19) and a cooling water return pipe (20). The cooling water inlet pipe (19) and the cooling water return pipe (20) are respectively connected to the temperature reduction heat exchanger (16). A temperature increase heat exchanger (21) is provided on the material conveying pipe (6). The temperature increase heat exchanger (21) is communicated with the secondary steam generator (14). The secondary steam generator (14) is connected with a liquid level gauge (22). A pressure sensor (23) is connected to the secondary steam generator (14); It includes a steam discharge pipe (24), a primary condenser, a secondary condenser, an aroma condensation tank A (25), and an aroma condensation tank B (26). The steam discharge pipe (24) is connected to the distillation column (5). The primary condenser includes a primary condenser A (27) and a primary condenser B (28). The secondary condenser includes a secondary condenser A (29) and a secondary condenser B (30). The primary condenser A (27) is respectively connected to a cooling water inlet pipe (19) and a cooling water return pipe (20). The secondary condenser A (29) is respectively connected to the cooling water inlet pipe (19) and the cooling water return pipe (20). The primary condenser A (27) is connected to the primary condenser B (28), and the primary condenser A (27) and the primary condenser B (28) are respectively connected to the aroma condensation tank A (25). The secondary condenser A (29) is connected to the primary condenser A (27). The secondary condenser B (30) is connected to the secondary condenser A (29). The aroma condensation tank B (26) is respectively connected to the secondary condenser A (29) and the secondary condenser B (30). The aroma condensation tank A (25) is connected to an aroma primary condensate pipe (31). The aroma condensation tank B (26) is connected to an aroma secondary condensate pipe (32); The aroma condensation tank A (25) is connected with a liquid level gauge A (33). The aroma condensation tank B (26) is connected with a liquid level gauge B (34). The secondary condenser B (30) and the aroma condensation tank B (26) are connected with a temperature sensor (35) and a cyclone separator (36). The primary condenser A (27), the primary condenser B (28), the secondary condenser A (29), and the secondary condenser B (30) are all connected with a temperature sensor (35).

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