Multi-level molecular distillation system capable of simultaneously separating multiple substances and distillation process of multi-level molecular distillation system

Abstract

The invention relates to the technical field of molecular distillation, in particular to a multi-level molecular distillation system capable of separating multiple substances at the same time and a distillation process thereof.The multi-level molecular distillation system comprises a first distiller, a second distiller is arranged on one side of the first distiller, and a third distiller is arranged on one side of the second distiller; a heating medium conveying branch pipe and a material conveying branch pipe are connected between the first distiller and the second distiller and between the second distiller and the third distiller respectively, and temperature adjusting assemblies are arranged on the two heating medium conveying branch pipes. A plurality of distillers are arranged, different evaporation temperatures are set for each distiller, raw materials flow through the distillers with the evaporation temperatures sequentially increased through the material conveying branch pipes, various products can be separated out, the working efficiency is improved, a heating medium flows through the distillers through the heating medium conveying branch pipes, heat recycling is achieved, and the production cost is reduced. And a high-temperature circulator does not need to be arranged for each distiller, so that the production cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of molecular distillation, in particular to a multi-level molecular distillation system capable of separating multiple substances simultaneously and a distillation process thereof. Background Art

[0002] Molecular distillation is a special separation technology that achieves separation based on the difference in the mean free path of the molecular motion of different substances. When a liquid mixture flows along a heating surface and is heated, light and heavy molecules will escape from the liquid surface and enter the gas phase. Since the free paths of light and heavy molecules are different, the molecules of different substances move different distances after escaping from the liquid surface. The light component molecules in the liquid are condensed and collected in the condenser, while the heavy component molecules are left on the heating surface. By controlling the evaporation and condensation process, the light component and the heavy component are separated. Molecular distillation technology is mainly used to prepare high-purity organic compounds, fine chemical products, pharmaceutical intermediates, etc., and has been widely used in the fields of petroleum, chemical, pharmaceutical, food, etc.

[0003] The existing molecular distillation system is only equipped with one distiller, and each distillation operation can only separate one substance, and it is impossible to separate multiple substances at the same time. For raw materials containing multiple substances, multiple repeated operations need to be performed manually, which is inefficient. Summary of the invention

[0004] The technical problem solved by the present invention is that the existing molecular distillation system is provided with only one distiller, and each distillation operation can only separate one substance, and it is impossible to separate multiple substances at the same time.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a multi-level molecular distillation system that can simultaneously separate multiple substances, including distiller one, distiller two is provided on one side of distiller one, distiller three is provided on one side of distiller two, a heating medium conveying branch pipe and a material conveying branch pipe are respectively connected between distiller one and distiller two, and between distiller two and distiller three, and temperature control components are provided on the two heating medium conveying branches.

[0006] Furthermore, the temperature control component includes a temperature control component main pipe, on which temperature sensor 1, one-way valve 1, three-way valve 1, and temperature sensor 2 are connected in sequence; the temperature control component main pipe is connected to one-way valve 2 through three-way valve 1; the other side of one-way valve 2 is connected to a variable frequency water pump; the other side of the variable frequency water pump is connected to three-way valve 2; the variable frequency water pump is connected to solenoid valve 1 and solenoid valve 2 through three-way valve 2; the solenoid valve 1 is connected to a heating medium input main pipe; and the solenoid valve 2 is connected to a heating medium output main pipe.

[0007] Furthermore, the medium flow direction of the one-way valve 1 is from temperature sensor 1 to three-way 1, and the medium flow direction of the one-way valve 2 is from the variable frequency water pump to three-way 1.

[0008] Furthermore, the structures of distiller one, distiller two and distiller three are the same, and one side wall of the distiller is provided with a raw material inlet, a heating medium outlet, a heating medium inlet, a vacuum interface, a residual material outlet and a product outlet from top to bottom, and the bottom of distiller one is provided with a condensing medium inlet and a condensing medium outlet.

[0009] Furthermore, the heating medium delivery branch pipe is connected between the heating medium outlet of distiller three and the heating medium inlet of distiller two, and between the heating medium outlet of distiller two and the heating medium inlet of distiller one, the material delivery branch pipe is connected between the residual material outlet of distiller one and the raw material inlet of distiller two, and between the residual material outlet of distiller two and the raw material inlet of distiller three, the temperature sensor one is located in the direction close to the heating medium outlet, the temperature sensor two is located in the direction close to the heating medium inlet, the heating medium outlet of distiller one is connected to the heating medium output main pipe, and the heating medium inlet of distiller three is connected to the heating medium input main pipe.

[0010] Furthermore, the condensing medium inlet of the distiller one is connected to the condensing medium input main pipe, the condensing medium inlets of the distiller two and the distiller three are respectively connected to the condensing medium input main pipe, the condensing medium outlet of the distiller one is connected to the condensing medium output main pipe, and the condensing medium outlets of the distiller two and the distiller three are respectively connected to the condensing medium output main pipe.

[0011] Furthermore, the raw material inlet of the distiller 1 is connected to a raw material storage tank.

[0012] Furthermore, the product outlets of the distiller one, distiller two, and distiller three are respectively connected to product receiving bottles, and the residual material outlet of the distiller three is connected to a residual material receiving bottle.

[0013] Furthermore, a cold trap is provided on the other side of the distiller one, and a vacuum pump is connected to the other side of the cold trap. A vacuum pipe is connected between the vacuum interface of the distiller one and the cold trap, and the vacuum interfaces of the distiller two and the distiller three are respectively connected to the vacuum pipe.

[0014] A multi-level molecular distillation process for separating multiple substances simultaneously comprises the following steps:

[0015] S1. Connect the device and put the raw materials to be distilled into the raw material storage tank, turn on the vacuum pump to provide and maintain a low vacuum environment for the system;

[0016] S2, setting the evaporation temperature of distiller 1, distiller 2, and distiller 3 respectively;

[0017] S3, start the system operation, the heating medium starts from the heating medium input main pipe and flows through distiller 3, distiller 2, distiller 1 in sequence, the temperature gradually decreases, and finally returns to the heating medium output main pipe, the temperature regulating component adjusts the temperature of the heating medium to meet the set evaporation temperature, the condensing medium enters from the condensing medium input main pipe and flows through distiller 3, distiller 2, distiller 1, and finally returns to the condensing medium output main pipe;

[0018] S4. After the system has been running for a period of time, the temperatures in distiller 1, distiller 2 and distiller 3 tend to be stable, the raw material enters distiller 1 to produce the first product, the residue of the first distillation enters distiller 2 to produce the second product, the residue of the second distillation enters distiller 3 to produce the third product, and the residue of the third distillation enters the residue receiving bottle, completing the separation of multiple products.

[0019] Beneficial effects of the present invention: The present invention arranges multiple distillers, sets different evaporation temperatures for each distiller, and the raw materials flow through multiple distiller's evaporation temperatures successively increasing through a feed branch pipe, thereby separating multiple products and improving work efficiency. The heating medium flows through multiple distiller's through a heating medium delivery branch pipe, thereby realizing heat reuse. There is no need to equip each distiller with a high-temperature circulator, thereby saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a multi-level molecular distillation system of the present invention that can separate multiple substances simultaneously.

[0021] Figure 2 It is a partial structural schematic diagram of a multi-level molecular distillation system of the present invention that can separate multiple substances simultaneously.

[0022] Figure 3 It is a partial structural diagram of a multi-level molecular distillation system of the present invention that can separate multiple substances simultaneously.

[0023] Figure 4 It is an overall structural diagram of a multi-level molecular distillation system of the present invention that can separate multiple substances simultaneously.

[0024] 1. Distiller 1; 101. Raw material inlet; 102. Residue outlet; 103. Product outlet; 104. Vacuum interface; 105. Heating medium outlet; 106. Heating medium inlet; 107. Condensing medium outlet; 108. Condensing medium inlet; 2. Distiller 2; 3. Distiller 3; 4. Raw material storage tank; 5. Temperature control component; 501. Temperature control component main pipe; 502. Temperature sensor 1; 503. One-way valve 1; 504. One-way valve 2; 505, variable frequency water pump; 506, solenoid valve one; 507, solenoid valve two; 508, temperature sensor two; 509, three-way one; 510, three-way two; 6, product receiving bottle; 7, residual material receiving bottle; 8, vacuum tube; 9, vacuum pump; 10, cold trap; 11, heating medium output pipe; 12, heating medium input pipe; 13, condensing medium output pipe; 14, condensing medium input pipe; 15, material delivery branch pipe; 16, heating medium delivery branch pipe. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below 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.

[0026] As the instruction manual Figure 1 , 34: A multi-level molecular distillation system capable of separating multiple substances simultaneously, comprising a distiller 1, a distiller 2 2 is disposed on one side of the distiller 1, a distiller 3 3 is disposed on one side of the distiller 2, the distiller 1, the distiller 2 2, and the distiller 3 3 have the same structure, a raw material inlet 101, a heating medium outlet 105, a heating medium inlet 106, a vacuum interface 104, a residual material outlet 102, and a product outlet 103 are sequentially disposed on the side wall of the distiller 1 from top to bottom, a condensing medium inlet 108 and a condensing medium outlet 107 are disposed at the bottom of the distiller 1, and between the distiller 1 and the distiller 2 2, the distiller 2 2 A heating medium delivery branch pipe 16 and a material delivery branch pipe 15 are respectively connected to the distiller three 3, and the two heating medium delivery branch pipes 16 are each provided with a temperature control component 5, and the heating medium delivery branch pipes 16 and the material delivery branch pipes 15 connect the three distillers in series; the heating medium inlet 106 of the distiller three 3 is connected to the heating medium input main pipe 12, and the heating medium delivery branch pipe 16 is connected between the heating medium outlet 105 of the distiller three 3 and the heating medium inlet 106 of the distiller two 2, and between the heating medium outlet 105 of the distiller two 2 and the heating medium inlet 106 of the distiller one 1, and the heating medium of the distiller one 1 The outlet 105 is connected to the heating medium output pipe 11. The heating medium flows from the heating medium input pipe 12 through the distiller three 3, the distiller two 2, and the distiller one 1 in sequence, and the temperature gradually decreases, and finally returns to the heating medium output pipe 11. The heating medium input pipe 12 and the heating medium output pipe 11 are connected to a high-temperature circulator (not shown in the figure) to heat the heating medium and provide circulation power; the raw material inlet 101 of the distiller one 1 is connected to the raw material storage tank 4, and the feed branch pipe 15 is connected between the residual material outlet 102 of the distiller one 1 and the raw material inlet 101 of the distiller two 2, and the residual material outlet 102 of the distiller two 2 Between the outlet 102 and the raw material inlet 101 of the distiller three 3, the product outlets 103 of the distiller one 1, the distiller two 2, and the distiller three 3 are respectively connected to the product receiving bottle 6, and the residual material outlet 102 of the distiller three 3 is connected to the residual material receiving bottle 7. The raw material first enters the distiller one 1, and the distiller one 1 has the lowest evaporation temperature and produces the first product. The residual material of the first distillation enters the distiller two 2, and the distiller two 2 has a moderate evaporation temperature and produces the second product. The residual material of the second distillation enters the distiller three 3, and the distiller three 3 has the highest evaporation temperature and produces the third product. The residual material of the third distillation enters the residual material receiving bottle 7;The condensing medium inlet 108 of distiller 1 is connected to the condensing medium input pipe 14, the condensing medium inlets 108 of distiller 2 2 and distiller 3 3 are respectively connected to the condensing medium input pipe 14, the condensing medium outlet 107 of distiller 1 is connected to the condensing medium output pipe 13, the condensing medium outlets 107 of distiller 2 2 and distiller 3 3 are respectively connected to the condensing medium output pipe 13, and the condensing medium input pipe 14 and the condensing medium output pipe 13 are connected to a low-temperature constant temperature circulator (not shown in the figure) to cool the condensing medium. and provide circulation power so that the product can be collected after condensation on the condenser; a cold trap 10 is provided on the other side of the distiller 1, and a vacuum pump 9 is connected to the other side of the cold trap 10. A vacuum pipe 8 is connected between the vacuum interface 104 of the distiller 1 and the cold trap 10. The vacuum interfaces 104 of the distiller 2 and the distiller 3 are respectively connected to the vacuum pipe 8. The vacuum pump 9 provides and maintains a lower vacuum environment for the system to achieve a better distillation effect. The cold trap 10 collects the escaped raw materials to prevent the raw materials from entering the vacuum pump 9 from the system and causing damage to the vacuum pump 9. ;

[0027] As the instruction manual Figure 2As shown: the temperature control component 5 includes a temperature control component main pipe 501, and the temperature control component main pipe 501 is connected with a temperature sensor 1 502, a one-way valve 1 503, a three-way 1 509, and a temperature sensor 2 508 in sequence. The temperature control component main pipe 501 is connected with a one-way valve 2 504 through a three-way 1 509, and the other side of the one-way valve 2 504 is connected with a variable frequency water pump 505, and the other side of the variable frequency water pump 505 is connected with a three-way 2 510. The variable frequency water pump 505 is connected with a solenoid valve 1 506 and a solenoid valve 2 507 through the three-way 2 510. The solenoid valve 1 506 is connected to the heating medium input main pipe 12, and the solenoid valve 2 50 7 is connected to a heating medium output main pipe 11, the medium flow direction of the one-way valve 1 503 is from the temperature sensor 1 502 to the three-way valve 1 509, the medium flow direction of the one-way valve 2 504 is from the variable frequency water pump 505 to the three-way valve 1 509, the temperature sensor 1 502 is located in the direction close to the heating medium outlet 105, the temperature sensor 2 508 is located in the direction close to the heating medium inlet 106, the variable frequency water pump 505, the solenoid valve 1 506, and the solenoid valve 2 507 are automatically controlled by the system control box (not shown in the figure), and the temperature sensor 1 502 and the temperature sensor 2 508 respectively detect the heating medium flowing through the temperature regulating component 5, one-way valve 1 503 and one-way valve 2 504 prevent the heating medium from flowing back, solenoid valve 1 506, solenoid valve 2 507 and variable frequency water pump 505 control the temperature control component 5 to extract the heating medium from the heating medium input pipe 12 and the heating medium output pipe 11. If the temperature detected by the temperature sensor 1 502 is lower than the required temperature, the system controls the solenoid valve 1 506 and the variable frequency water pump 505 to open, and the heating medium in the heating medium input pipe 12 is extracted to the temperature control component pipe 501 to mix with the original heating medium, thereby increasing the temperature of the original heating medium, and the variable frequency water pump 505 is running. The frequency gradually increases and the flow rate gradually increases until the temperature detected by temperature sensor 2 508 meets the set temperature. The operating frequency of the variable frequency water pump 505 is fixed. On the contrary, if the temperature detected by temperature sensor 1 502 is higher than the set temperature, the system controls solenoid valve 2 507 and variable frequency water pump 505 to open, and the heating medium in the heating medium output main pipe 11 is drawn to the temperature control component main pipe 501 to mix with the original heating medium, thereby reducing the temperature of the original heating medium. The temperature control component 5 makes the evaporation temperature of distiller 1, distiller 2, and distiller 3 3 meet the set temperature to achieve a better distillation effect.

[0028] A multi-level molecular distillation process for separating multiple substances simultaneously comprises the following steps:

[0029] S1. Connect the device and put the raw material to be distilled into the raw material storage tank 4, turn on the vacuum pump 9, and provide and maintain a low vacuum environment for the system;

[0030] S2, setting the evaporation temperature of distiller 1, distiller 2, and distiller 3;

[0031] S3, start the system operation, the heating medium starts from the heating medium input main pipe 12 and flows through the distiller three 3, distiller two 2, distiller one 1 in sequence, the temperature gradually decreases, and finally returns to the heating medium output main pipe 11, the temperature adjustment component 5 adjusts the temperature of the heating medium to meet the set evaporation temperature, the condensing medium enters from the condensing medium input main pipe 14 and flows through the distiller three 3, distiller two 2, distiller one 1, and finally returns to the condensing medium output main pipe 13;

[0032] S4. After the system has been running for a period of time, the temperatures in distiller 1, distiller 2 and distiller 3 tend to be stable, the raw material enters distiller 1 to produce the first product, the residue of the first distillation enters distiller 2 2 to produce the second product, the residue of the second distillation enters distiller 3 3 to produce the third product, and the residue of the third distillation enters the residue receiving bottle 7, completing the separation of multiple products.

[0033] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A multi-level molecular distillation system capable of separating multiple substances simultaneously, characterized in that: The invention comprises a distiller 1 (1), a distiller 2 (2) is arranged on one side of the distiller 1 (1), a distiller 3 (3) is arranged on one side of the distiller 2 (2), a heating medium delivery branch pipe (16) and a material delivery branch pipe (15) are respectively connected between the distiller 1 (1) and the distiller 2 (2), and between the distiller 2 (2) and the distiller 3 (3), and a temperature regulating component (5) is arranged on both the two heating medium delivery branch pipes (16).

2. A multi-level molecular distillation system capable of simultaneously separating multiple substances according to claim 1, characterized in that: The temperature control component (5) comprises a temperature control component main pipe (501), to which a temperature sensor 1 (502), a one-way valve 1 (503), a three-way valve 1 (509), and a temperature sensor 2 (508) are connected in sequence; the temperature control component main pipe (501) is connected to a one-way valve 2 (504) via the three-way valve 1 (509); the other side of the one-way valve 2 (504) is connected to a variable frequency water pump (505); the other side of the variable frequency water pump (505) is connected to a three-way valve 2 (510); the variable frequency water pump (505) is connected to a solenoid valve 1 (506) and a solenoid valve 2 (507) via the three-way valve 2 (510); the solenoid valve 1 (506) is connected to a heating medium input main pipe (12); and the solenoid valve 2 (507) is connected to a heating medium output main pipe (11).

3. A multi-level molecular distillation system capable of simultaneously separating multiple substances according to claim 2, characterized in that: The medium flow direction of the one-way valve 1 (503) is from the temperature sensor 1 (502) to the three-way valve 1 (509), and the medium flow direction of the one-way valve 2 (504) is from the variable frequency water pump (505) to the three-way valve 1 (509).

4. A multi-level molecular distillation system capable of simultaneously separating multiple substances according to claim 1, characterized in that: The distiller one (1), distiller two (2), and distiller three (3) have the same structure. The side wall of the distiller one (1) is provided with a raw material inlet (101), a heating medium outlet (105), a heating medium inlet (106), a vacuum interface (104), a residual material outlet (102), and a product outlet (103) from top to bottom. The bottom of the distiller one (1) is provided with a condensing medium inlet (108) and a condensing medium outlet (107).

5. A multi-level molecular distillation system capable of simultaneously separating multiple substances according to claim 4, characterized in that: The heating medium delivery branch pipe (16) is connected between the heating medium outlet (105) of distiller three (3) and the heating medium inlet (106) of distiller two (2), and between the heating medium outlet (105) of distiller two (2) and the heating medium inlet (106) of distiller one (1); the material delivery branch pipe (15) is connected between the residual material outlet (102) of distiller one (1) and the raw material inlet (101) of distiller two (2), and between the residual material outlet (103) of distiller two (2) and the raw material inlet (104) of distiller two (2). 102) and the raw material inlet (101) of the distiller three (3), the temperature sensor one (502) is located in the direction close to the heating medium outlet (105), the temperature sensor two (508) is located in the direction close to the heating medium inlet (106), the heating medium outlet (105) of the distiller one (1) is connected to the heating medium output main pipe (11), and the heating medium inlet (106) of the distiller three (3) is connected to the heating medium input main pipe (12).

6. A multi-level molecular distillation system capable of simultaneously separating multiple substances according to claim 4, characterized in that: The condensing medium inlet (108) of the distiller one (1) is connected to the condensing medium input main pipe (14), the condensing medium inlets (108) of the distiller two (2) and the distiller three (3) are respectively connected to the condensing medium input main pipe (14), the condensing medium outlet (107) of the distiller one (1) is connected to the condensing medium output main pipe (13), and the condensing medium outlets (107) of the distiller two (2) and the distiller three (3) are respectively connected to the condensing medium output main pipe (13).

7. A multi-level molecular distillation system capable of simultaneously separating multiple substances according to claim 4, characterized in that: The raw material inlet (101) of the distiller 1 (1) is connected to a raw material storage tank (4).

8. A multi-level molecular distillation system capable of simultaneously separating multiple substances according to claim 4, characterized in that: The product outlets (103) of the distiller one (1), distiller two (2) and distiller three (3) are respectively connected to product receiving bottles (6), and the residual material outlet (102) of the distiller three (3) is connected to a residual material receiving bottle (7).

9. A multi-level molecular distillation system capable of simultaneously separating multiple substances according to claim 4, characterized in that: A cold trap (10) is provided on the other side of the distiller one (1), and a vacuum pump (9) is connected to the other side of the cold trap (10). A vacuum pipe (8) is connected between the vacuum interface (104) of the distiller one (1) and the cold trap (10), and the vacuum interfaces (104) of the distiller two (2) and the distiller three (3) are respectively connected to the vacuum pipe (8).

10. A multi-stage molecular distillation process for simultaneously separating multiple substances as claimed in claims 1 to 9, characterized in that: The steps include: S1. Connect the device and put the raw material to be distilled into the raw material storage tank 4, turn on the vacuum pump 9, and provide and maintain a low vacuum environment for the system; S2, setting the evaporation temperature of distiller 1, distiller 2, and distiller 3; S3, start the system operation, the heating medium starts from the heating medium input main pipe 12 and flows through the distiller three 3, distiller two 2, distiller one 1 in sequence, the temperature gradually decreases, and finally returns to the heating medium output main pipe 11, the temperature adjustment component 5 adjusts the temperature of the heating medium to meet the set evaporation temperature, the condensing medium enters from the condensing medium input main pipe 14 and flows through the distiller three 3, distiller two 2, distiller one 1, and finally returns to the condensing medium output main pipe 13; S4. After the system has been running for a period of time, the temperatures in distiller 1, distiller 2 and distiller 3 tend to be stable, the raw material enters distiller 1 to produce the first product, the residue of the first distillation enters distiller 2 2 to produce the second product, the residue of the second distillation enters distiller 3 3 to produce the third product, and the residue of the third distillation enters the residue receiving bottle 7, completing the separation of multiple products.

Images