Molecular distillation equipment

Abstract

The utility model provides molecular distillation equipment, which relates to the technical field of distillation equipment and comprises a molecular distillation box and a degassing device, and the molecular distillation box is provided with a material inlet; the degassing device is fixedly connected with the molecular distillation box and is communicated with the material inlet, the degassing device comprises a vacuum degassing tank, a feeding pipe and a discharging pipe, the outlet end of the feeding pipe extends into the vacuum degassing tank, the outer side of the vacuum degassing tank is communicated with a vacuum pipe, and the discharging pipe is communicated with the vacuum pipe. The discharging pipe is arranged at the bottom of the vacuum degassing tank, the vacuum degassing tank is fixedly connected with the molecular distillation box, the discharging pipe is communicated with the material inlet, and a plurality of film covering assemblies are sequentially arranged in the vacuum degassing tank from top to bottom; the molecular distillation equipment disclosed by the utility model can timely and fully remove volatile impurities and air before the fatty acid glycerol mixed ester to be distilled is distilled, so that the distillation effect is ensured, and the quality and the purity of products are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation equipment, in particular to a molecular distillation equipment. Background Art

[0002] Molecular distillation is a highly efficient separation scheme under high vacuum, with the advantages of short material residence time, low operating temperature, higher separation degree than process cleanliness and environmental protection, etc. It is particularly suitable for enriching or purifying organic compounds with high boiling point, high viscosity or heat sensitivity. Since the emergence of molecular distillation in the 1930s, it has been paid attention to by countries all over the world. In the 1960s, the industrial production of vitamin A extracted from cod liver oil was successfully carried out. Many developed countries have successively designed and manufactured multiple sets of industrial molecular distillation equipment, which have been used in the production of more than one hundred products. With people's favor for natural substances and the continuous emergence of new products, molecular distillation technology has developed rapidly.

[0003] Fatty acid glycerides can be divided into monoesters, diesters and triesters according to the combination of glycerol and fatty acids. Monoesters are also called monoglycerol fatty acid esters. It is generally believed that their content reaches more than 90%. They can be used as surfactants and emulsifiers and are widely used in chemical, food, pharmaceutical and other industries. In terms of food emulsifiers, monoglycerol fatty acid esters account for more than 50% of the share. Fatty acid glycerides usually use glycerol and fatty acids or vegetable oils as raw materials. Through esterification or alcoholysis reaction, mixed esters with a monoester content of 40-60% are obtained. To obtain monoesters with a content of more than 90%, molecular distillation technology is generally used for purification.

[0004] The existing Chinese invention patent with publication number CN101732881A discloses a molecular distiller, including a motor, a cylinder, a jacket on the outer periphery of the cylinder, a feed port, a rotating shaft, a rotating cage device, a condenser assembly, and a light oil collecting tank. The condenser assembly is a cylindrical device surrounded by a plurality of condensers. The motor is connected to the rotating shaft through a reduction mechanism, and the rotating shaft passes through the cylinder end cover and is fixedly connected to the rotating cage device. The radial distance between the outer tube wall of the condenser and the inner wall of the cylinder is set to 3.6 cm to 4.2 cm. A scraping film structure is adopted, which has a simple structure. Since the scraper strip is movably supported in the column slide groove of the rotating cage device, the distance between the condenser and the inner wall of the cylinder is reduced. Under the action of the rotating centrifugal force, the scraper strip slides out and adheres to the inner wall of the cylinder, making the scraping film more uniform and the film layer thinner, so that a large number of evaporated molecules can more easily obtain leap kinetic energy, thereby improving the separation rate and yield.

[0005] However, in the above technical solution, since the fatty acid glycerol mixed ester to be distilled may contain volatile impurities and air after entering the molecular distiller, it may be distilled out together with the target component, resulting in an increase in the impurity content in the product, affecting the distillation effect and reducing the quality and purity of the product. Utility Model Content

[0006] Based on this, in order to solve the fatty acid glycerol mixed ester to be distilled may have volatile impurities and air after entering molecular distiller, cause the content of impurities in product to increase, reduce the quality of product and the problem of purity, the utility model aims to provide a kind of molecular distillation equipment, and its specific technical scheme is as follows:

[0007] A molecular distillation device comprises a molecular distillation box and a degassing device, wherein a material inlet is arranged on the molecular distillation box; the degassing device is fixedly connected to the molecular distillation box and communicated with the material inlet, the degassing device comprises a vacuum degassing tank, a feed pipe and a discharge pipe, the outlet end of the feed pipe extends into the vacuum degassing tank, the outer side of the vacuum degassing tank is communicated with a vacuum pipe, the discharge pipe is arranged at the bottom of the vacuum degassing tank, the vacuum degassing tank is fixedly connected to the molecular distillation box, the discharge pipe is communicated with the material inlet, and a plurality of film covering components are arranged in sequence from top to bottom in the vacuum degassing tank.

[0008] Furthermore, the coating assembly includes an inverted U-shaped arc plate, a liquid storage box and a drain pipe. The liquid storage box is detachably connected to the inner wall of the vacuum degassing tank. A gap is left at the connection between the liquid storage box and the vacuum degassing tank. The inverted U-shaped arc plate is fixedly connected to a side of the liquid storage box close to the feed pipe. The drain pipe is arranged on the liquid storage box and passes through the liquid storage box.

[0009] Furthermore, a receiving box is provided at the outlet end of the feed pipe, the feed pipe extends into the receiving box and is fixedly connected to the receiving box, the gap between the feed pipe and the inner wall of the receiving box forms a buffer channel, and a plurality of drainage holes are provided at the bottom of the receiving box.

[0010] Furthermore, an elastic member is provided on the inner wall of the receiving box, and the feed pipe is fixedly connected to the receiving box via the elastic member.

[0011] Furthermore, a plurality of symmetrically arranged mounting seats are provided on the inner side wall of the vacuum degassing tank, each mounting seat is provided with a receiving groove, and a limiting protrusion adapted to the receiving groove is provided on the liquid storage box, and the limiting protrusion is located in the receiving groove and is clamped with the receiving groove.

[0012] Furthermore, the liquid discharge pipe includes a connecting section and a liquid outlet section, one end of the connecting section is connected to the liquid outlet section, one end of the connecting section away from the liquid outlet section is connected to the receiving box, and the liquid outlet section is arranged in a trumpet shape.

[0013] Furthermore, an inner backflow slope is provided at the inner edge of the inlet of the connecting section.

[0014] Furthermore, a conical hopper is connected to the bottom of the vacuum degassing tank, and the discharge pipe is connected to the bottom of the conical hopper.

[0015] Furthermore, three film covering components are evenly and equidistantly arranged in the vacuum degassing tank from top to bottom.

[0016] Furthermore, the degassing device is arranged obliquely on the molecular distillation box.

[0017] Compared with the prior art, the beneficial effect of the utility model is that: the molecular distillation equipment of the utility model is provided with a degassing device, and the degassing device includes a vacuum degassing tank, a feed pipe and a discharge pipe. Before the fatty acid glycerol mixed ester enters the molecular distiller, the volatile impurities and air therein can be effectively removed, thereby reducing the content of impurities in the product, thereby improving the quality and purity of the product. A plurality of film components arranged in sequence from top to bottom in the vacuum degassing tank can further increase the contact area between the fatty acid glycerol mixed ester and the vacuum environment, thereby improving the degassing effect. The outlet end of the feed pipe extends into the vacuum degassing tank, thereby ensuring that the fatty acid glycerol mixed ester can directly enter the vacuum environment for degassing treatment. The discharge pipe is arranged at the bottom of the vacuum degassing tank and is connected to the material inlet of the molecular distillation box, thereby ensuring that the fatty acid glycerol mixed ester that has been degassed can smoothly enter the molecular distiller for subsequent distillation operations. The molecular distillation equipment of the utility model can timely and fully remove volatile impurities and air before the fatty acid glycerol mixed ester to be distilled is distilled, thereby ensuring the distillation effect and improving the quality and purity of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention may be further understood from the following description in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same figure numerals designate corresponding parts.

[0019] Figure 1 It is a structural schematic diagram of a molecular distillation device according to an embodiment of the utility model;

[0020] Figure 2 It is a cross-sectional view of the internal structure of the degassing device according to one embodiment of the utility model;

[0021] Figure 3 yes Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0022] Figure 4 It is a structural schematic diagram of a film covering assembly according to an embodiment of the utility model;

[0023] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure of B;

[0024] Figure 6 It is a top cross-sectional view of a vacuum degassing tank according to an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1. Molecular distillation box; 11. Material inlet; 2. Degassing device; 21. Vacuum degassing tank; 22. Feed pipe; 23. Discharge pipe; 24. Vacuum tube; 25. Laminating assembly; 251. Inverted U-shaped arc plate; 252. Liquid storage box; 2521. Limiting protrusion; 253. Discharge pipe; 2531. Connecting section; 25311. Internal backflow slope; 2532. Liquid outlet section; 26. Receiving box; 261. Buffer channel; 262. Discharge hole; 263. Elastic member; 27. Mounting seat; 271. Accommodating groove; 28. Conical hopper. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described here are only used to explain the utility model and do not limit the protection scope of the utility model.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element, and when an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific implementation methods and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0030] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0031] like Figure 1-Figure 6As shown, a molecular distillation device in one embodiment of the utility model comprises a molecular distillation box 1 and a degassing device 2, and a material inlet 11 is provided on the molecular distillation box 1; the degassing device 2 is fixedly connected to the molecular distillation box 1 and communicated with the material inlet 11, the degassing device 2 comprises a vacuum degassing tank 21, a feeding pipe 22 and a discharge pipe 23, and the volatile impurities and air in the fatty acid glycerol mixed ester can be effectively removed before entering the molecular distiller, thereby reducing the content of impurities in the product, thereby improving the quality and purity of the product, and the outlet end of the feeding pipe 22 extends into the vacuum degassing tank 21 to ensure that the fatty acid glycerol mixed ester can directly enter the vacuum environment for degassing treatment, the outside of the vacuum degassing tank 21 is communicated with a vacuum pipe 24, and the discharge pipe 23 is arranged at the bottom of the vacuum degassing tank 21, the vacuum degassing tank 21 is fixedly connected to the molecular distillation box 1, and the discharge pipe 23 is communicated with the material inlet 11, ensuring that the fatty acid glycerol mixed ester after degassing treatment can smoothly enter the molecular distiller for subsequent distillation operation, and the vacuum degassing tank 21 is sequentially arranged from top to bottom. The plurality of film covering components 25 can further increase the contact area between the fatty acid glycerol mixed ester and the vacuum environment and improve the degassing effect. The fatty acid glycerol mixed ester to be distilled falls onto the film covering component 25. Under the action of gravity, the fatty acid glycerol mixed ester spreads on the surface of the film covering component 25 to form a thin liquid film and flows down along the surface of the film covering component 25. The fatty acid glycerol mixed ester is degassed during the film forming process and the degassed fatty acid glycerol mixed ester is discharged from the discharge pipe 23. The film forming and degassing of the multiple film covering components 25 increases the surface area and the contact area per unit volume of the fatty acid glycerol mixed ester in contact with the vacuum environment. At the same time, the degassing time of the fatty acid glycerol mixed ester in the vacuum degassing tank 21 is prolonged, thereby improving the degassing effect. Moreover, it will not cause any influence on the fatty acid glycerol mixed ester, which is beneficial to maintaining the original quality of the fatty acid glycerol mixed ester. In the present embodiment, three film covering components 25 are evenly and equidistantly arranged in the vacuum degassing tank 21 from top to bottom. In addition, the number and position of the film covering components 25 can be designed differently according to different needs.

[0032] As a preferred embodiment of the utility model, it may also have the following additional technical features: the coating component 25 includes an inverted U-shaped arc plate 251, a liquid storage box 252 and a discharge pipe 253; the liquid storage box 252 is detachably connected to the inner side wall of the vacuum degassing tank 21; a gap is left at the connection between the liquid storage box 252 and the vacuum degassing tank 21 to ensure that the fatty acid glycerol mixed ester can be discharged smoothly; the inverted U-shaped arc plate 251 is fixedly connected to a side of the liquid storage box 252 close to the feed pipe 22; the discharge pipe 253 is arranged on the liquid storage box 252 and passes through the liquid storage box 252; the fatty acid glycerol mixed ester passes through the inverted U-shaped arc plate 251 and enters the liquid storage box 252 and is discharged from the discharge pipe 253 to the next coating The membrane assembly 25 is discharged into the molecular distillation box 1 until it reaches the discharge pipe 23. The fatty acid glycerol mixed ester to be distilled will flow down along the inverted U-shaped arc plate 251 under the action of gravity, and form a thin liquid film on the inverted U-shaped arc plate 251, which greatly increases the contact area between the fatty acid glycerol mixed ester and the vacuum environment, which is beneficial to the rapid escape of volatile impurities and air in the fatty acid glycerol mixed ester. The liquid film formed by the fatty acid glycerol mixed ester on the inverted U-shaped arc plate 251 will remain stable and flow smoothly due to the effect of surface tension, which is beneficial to the uniform and stable escape of the volatile components in the fatty acid glycerol mixed ester under the vacuum environment, thereby improving the degassing effect and efficiency.

[0033] As a preferred embodiment of the utility model, it may also have the following additional technical features: a receiving box 26 is provided at the outlet end of the feed pipe 22, the feed pipe 22 extends into the receiving box 26 and is fixedly connected to the receiving box 26, and a buffer channel 261 is formed in the gap between the feed pipe 22 and the inner wall of the receiving box 26. When the flow rate of the fatty acid glycerol mixed ester is too large, the excess fatty acid glycerol mixed ester can flow out through the buffer channel 261. A plurality of drainage holes 262 are provided at the bottom of the receiving box 26. The setting of the receiving box 26 enables the fatty acid glycerol mixed ester flowing out of the feed pipe 22 to flow into it stably, avoiding the fatty acid glycerol mixed ester directly impacting the inner wall of the vacuum degassing tank 21 and the inverted U-shaped arc plate 251, thereby ensuring the stability of the device structure. The receiving box 26 serves as a buffer zone, allowing the fatty acid glycerol mixed ester to flow stably and be preliminarily dispersed therein before entering the vacuum degassing tank 21, which is beneficial for the fatty acid glycerol mixed ester to better form a liquid film in the subsequent process, increase the contact area with the vacuum environment, and thus improve the degassing effect.

[0034] As a preferred embodiment of the utility model, it may also have the following additional technical features: an elastic member 263 is provided on the inner wall of the receiving box 26, and the feed pipe 22 is fixedly connected to the receiving box 26 through the elastic member 263. When the fatty acid glycerol mixed ester flows from the feed pipe 22 into the receiving box 26, a certain impact force and vibration may be generated. The presence of the elastic member 263 can effectively buffer such impact and vibration, reduce damage to the receiving box 26 and the feed pipe 22, thereby extending the service life. At the same time, when the flow rate of the fatty acid glycerol mixed ester is too large, the elastic member 263 will be deformed due to the increase in pressure, so that the gap between the feed pipe 22 and the receiving box 26 becomes larger, and the excess fatty acid glycerol mixed ester can flow out through the gap to form a buffer channel 261, thereby preventing the fatty acid glycerol mixed ester from directly impacting the inner wall of the vacuum degassing tank 21 and the inverted U-shaped arc plate 251

[0035] As a preferred embodiment of the utility model, it may also have the following additional technical features: a plurality of symmetrically arranged mounting seats 27 are provided on the inner side wall of the vacuum degassing tank 21, each mounting seat 27 is provided with a accommodating groove 271, and a limiting protrusion 2521 adapted to the accommodating groove 271 is provided on the liquid storage box 252, and the limiting protrusion 2521 is located in the accommodating groove 271 and is clamped with the accommodating groove 271. In other embodiments, the size and shape of the accommodating groove 271 and the limiting protrusion 2521 can be designed differently according to different needs.

[0036] As a preferred embodiment of the utility model, it may also have the following additional technical features: the discharge pipe 253 includes a connecting section 2531 and a liquid outlet section 2532, one end of the connecting section 2531 is connected to the liquid outlet section 2532, and the end of the connecting section 2531 away from the liquid outlet section 2532 is connected to the receiving box 26, which helps to guide the fluid to flow along a predetermined path and prevent fluid splashing or overflow. The liquid outlet section 2532 is arranged in a trumpet shape, which can increase the passage area of ​​the fluid and reduce the resistance to the fluid flow, thereby ensuring that the fluid can flow out smoothly.

[0037] As a preferred embodiment of the utility model, it may also have the following additional technical features: an inner backflow slope 25311 is provided at the inner edge of the inlet of the connecting section 2531. When the fatty acid glycerol mixed ester flows from the receiving box 26 to the discharge pipe 253, the inner backflow slope 25311 can guide the fluid to enter the connecting section 2531 more smoothly, reduce fluid impact and vortex formation, thereby reducing energy loss and improving fluid transmission efficiency.

[0038] As a preferred embodiment of the utility model, it may also have the following additional technical features: the bottom of the vacuum degassing tank 21 is connected to a conical hopper 28, and the discharge pipe 23 is connected to the bottom of the conical hopper 28, so that the fatty acid glycerol mixed ester can flow smoothly from the vacuum degassing tank 21 to the discharge pipe 23, avoiding the retention and blockage of materials in the tank or hopper.

[0039] As a preferred embodiment of the utility model, it may also have the following additional technical features: the degassing device 2 is tiltedly arranged on the molecular distillation box 1 to facilitate the staff to put the fatty acid glycerol mixed ester to be distilled.

[0040] The working principle of the molecular distillation equipment of this embodiment is as follows: First, the fatty acid glycerol mixed ester to be distilled enters the molecular distillation equipment through the material inlet 11, and first enters the feed pipe 22 of the degassing device 2. The outlet end of the feed pipe 22 is provided with a receiving box 26. When the fatty acid glycerol mixed ester flows into the receiving box 26, it is buffered by the elastic member 263, which reduces direct impact and vibration, and ensures the stability of the device structure. Then, the fatty acid glycerol mixed ester passes through a plurality of film covering components 25 from top to bottom in sequence, and each film covering component 25 includes an inverted U-shaped arc plate 251, a liquid storage Box 252 and drain pipe 253, the fatty acid glycerol mixed ester flows down along the inverted U-shaped arc plate 251 under the action of gravity and forms a thin liquid film on its surface, the degassed fatty acid glycerol mixed ester enters the liquid storage box 252, and is discharged to the next film coating component 25 through the drain pipe 253 until it reaches the discharge pipe 23, and the degassed fatty acid glycerol mixed ester is discharged into the material inlet 11 of the molecular distillation box 1 through the discharge pipe 23, and the outer side of the vacuum degassing tank 21 is connected to a vacuum pipe 24, and the vacuum environment in the tank is maintained by the vacuum system to ensure the degassing effect.

[0041] The molecular distillation equipment of this embodiment has a reasonable structural design and is easy to use. This structure can also be used for other equipment with similar usage requirements. In this embodiment, the molecular distillation equipment can timely and fully remove volatile impurities and air before the distillation of the fatty acid glycerol mixed ester to be distilled, thereby ensuring the distillation effect and improving the quality and purity of the product.

[0042] In the description of the above embodiments, greater than, less than, exceed, etc. are understood to not include the number itself, several, and a plurality mean more than one, and above, below, and within, etc. are understood to include the number itself. If there is a description of first or second, it is only for the purpose of distinguishing the technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0043] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction between the combinations of these technical features, they should be considered to be within the scope recorded in this specification.

[0044] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A molecular distillation device, characterized in that: include: A molecular distillation box, wherein the molecular distillation box is provided with a material inlet; A degassing device, the degassing device is fixedly connected to the molecular distillation box and communicated with the material inlet, the degassing device comprises a vacuum degassing tank, a feed pipe and a discharge pipe, the outlet end of the feed pipe extends into the vacuum degassing tank, the outside of the vacuum degassing tank is communicated with a vacuum pipe, the discharge pipe is arranged at the bottom of the vacuum degassing tank, the vacuum degassing tank is fixedly connected to the molecular distillation box, the discharge pipe is communicated with the material inlet, and a plurality of film covering components are arranged in sequence from top to bottom in the vacuum degassing tank; The coating assembly includes an inverted U-shaped arc plate, a liquid storage box and a drain pipe. The liquid storage box is detachably connected to the inner wall of the vacuum degassing tank. A gap is left at the connection between the liquid storage box and the vacuum degassing tank. The inverted U-shaped arc plate is fixedly connected to a side of the liquid storage box close to the feed pipe. The drain pipe is arranged on the liquid storage box and passes through the liquid storage box.

2. The molecular distillation equipment according to claim 1, characterized in that: A receiving box is provided at the outlet end of the feed pipe, the feed pipe extends into the receiving box and is fixedly connected to the receiving box, a buffer channel is formed by the gap between the feed pipe and the inner wall of the receiving box, and a plurality of drainage holes are provided at the bottom of the receiving box.

3. The molecular distillation equipment according to claim 2, characterized in that: An elastic member is provided on the inner wall of the receiving box, and the feeding pipe is fixedly connected to the receiving box via the elastic member.

4. The molecular distillation equipment according to claim 1, characterized in that: The inner wall of the vacuum degassing tank is provided with a plurality of symmetrically arranged mounting seats, each mounting seat is provided with a receiving groove, and the liquid storage box is provided with a limiting protrusion adapted to the receiving groove, and the limiting protrusion is located in the receiving groove and is clamped with the receiving groove.

5. The molecular distillation equipment according to claim 2, characterized in that: The liquid discharge pipe comprises a connecting section and a liquid outlet section, one end of the connecting section is connected to the liquid outlet section, one end of the connecting section away from the liquid outlet section is connected to the receiving box, and the liquid outlet section is arranged in a trumpet shape.

6. The molecular distillation equipment according to claim 5, characterized in that: An inner backflow slope is arranged at the inner edge of the inlet of the connecting section.

7. The molecular distillation equipment according to claim 1, characterized in that: The bottom of the vacuum degassing tank is connected with a conical hopper, and the discharge pipe is connected with the bottom of the conical hopper.

8. The molecular distillation equipment according to claim 1, characterized in that: Three film covering components are evenly and equidistantly arranged in the vacuum degassing tank from top to bottom.

9. The molecular distillation equipment according to claim 1, characterized in that: The degassing device is arranged obliquely on the molecular distillation box.

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