CN213100888U

CN213100888U - Molecular distiller

Info

Publication number: CN213100888U
Application number: CN202021753620.XU
Authority: CN
Inventors: 杨正群
Original assignee: Suzhou Baiaoke Biotechnology Co ltd
Current assignee: Suzhou Baiaoke Biotechnology Co ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-05-04
Anticipated expiration: 2030-08-20

Abstract

The utility model relates to the technical field of molecular distillation, in particular to a molecular distiller, which comprises a motor, a distillation barrel and a condenser, wherein the condenser is arranged in the distillation barrel, a film scraper is arranged between the condenser and the distillation barrel, the film scraper comprises an upper mounting seat, a lower mounting seat and a plurality of film scraping assemblies, and a mounting guide rail is arranged between the upper mounting seat and the lower mounting seat; the film scraping assembly comprises an installation platform, a hard scraping plate and a flexible scraping plate, the installation platform is installed on the installation guide rail, an installation groove is formed in the installation platform, the hard scraping plate is rotatably arranged in the installation groove, the hard scraping plate and the inner wall of the distillation barrel keep proper intervals and are not in contact with each other, and the flexible scraping plate is fixedly arranged on one side, close to the distillation barrel, of the hard scraping plate; the utility model discloses can avoid the mechanical friction between stereoplasm scraper blade and the distillation column, reduce film thickness, improve evaporation efficiency.

Description

Molecular distiller

Technical Field

The utility model relates to a molecular distillation technical field, concretely relates to molecular distiller.

Background

Molecular distillation, also known as short-path distillation, is a liquid-liquid separation technique carried out under vacuum conditions, has the characteristics of low distillation temperature, high vacuum degree, short thermal contact time, high separation degree and the like, and is particularly suitable for separating high-boiling-point, heat-sensitive and easily-decomposed substances. The basic principle of molecular distillation is that a liquid material is forced to form a film on a hot surface by a mechanical device, usually a rotary film scraper, and light components in the material are heated and evaporated, escape from the hot surface and are captured by a cold surface; the separation of the liquid material is achieved by a membrane scraper and the raffinate (heavy components) is rapidly removed from the hot surface. The molecular distillation overcomes the constraint of vapor-liquid balance in the conventional distillation and evaporation, so that the whole distillation process always keeps higher mass transfer driving force, thereby realizing the high-efficiency separation of substances.

The key equipment for realizing molecular distillation is a molecular distiller, and the molecular distiller currently appears as follows: the scraper type molecular distiller is an improvement on the falling film type molecular distiller and is the biggest difference from the falling film type molecular distiller in the intervention of the scraper, and the scraper is arranged between an internal condensation area of the molecular distiller and the inner wall of the distiller and has the function of distributing materials to be distilled on the inner wall of the distiller to form a thin film with uniform thickness. The scraper is an important component in the film scraper, the scraper is used for enabling the material to form an extremely thin liquid film on the evaporation surface, and the scraper can be attached to the evaporation surface under the action of centrifugal force and slides on the evaporation surface to drive the liquid to move on the evaporation surface, so that the mass and heat transfer is enhanced. Ideally, the rotating wiper should be perfectly coaxial with the cylindrical hot surface, and both perfectly cylindrical. In this way, the outer edge of the scraper fixed to the scraper can be kept physically free from contact with the hot surface of the inner wall of the retort and with a constant clearance (typically in the order of submillimeters). However, such an ideal configuration is not realized in industrial practice. This is because any true cylinder is out of roundness and is limited by machining accuracy, and the two devices cannot be perfectly coaxial. In addition, mechanical stress deformation, thermal expansion deformation, thermal stress deformation, centrifugal force, bearing clearance, mechanical vibration and other factors can cause the outer edge of the scraper and the hot surface of the inner wall of the distiller to be incapable of keeping a constant clearance and even to be in physical contact. In view of these factors, it is often necessary to increase the clearance to avoid mechanical contact between the blade and the hot surface. However, increasing the gap will result in the formation of a thick film, reducing the evaporation efficiency. In addition, the gap between the scraper and the hot surface is also not constant during rotation, resulting in uneven film thickness and affecting evaporation efficiency.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at overcoming the defect among the prior art, provide a molecular still, can avoid the mechanical friction between stereoplasm scraper blade and the distillation column, reduce film thickness, improve evaporation efficiency.

The utility model discloses a molecular distiller, including motor, distillation column and condenser, the distillation column outside is equipped with the heating jacket, the condenser is located in the distillation column, be equipped with the knifing device between condenser and the distillation column, the knifing device is driven by the motor and is wound the rotation of distillation column axis, the knifing device includes upper mount pad, lower mount pad and a plurality of knifing subassemblies, be equipped with the installation guide rail between upper mount pad and the lower mount pad; the knifing subassembly includes mount table, stereoplasm scraper blade and flexible doctor-bar, the mount table is installed on the installation guide rail, be equipped with the mounting groove on the mount table, one side of stereoplasm scraper blade is located with rotating through the pivot in the mounting groove, the tip of mount table is equipped with a plurality of location screws, the articulated linking arm that is equipped with of tip of stereoplasm scraper blade, the linking arm selects a location in arbitrary location screw through positioning bolt, just the stereoplasm scraper blade with the inner wall of distillation column keeps suitable interval contactless each other, the stereoplasm scraper blade is close to one side of distillation column is fixed to be set up flexible doctor-bar, the outside of flexible doctor-bar have the part can with the laminating of distillation column inner wall, the inboard of flexible doctor-bar is equipped with the counter weight strip.

Further, still be equipped with the guide plate on the mount table, the guide plate is inserted and is established on the mount table, just the guide plate has inclination with the direction of motion of mount table, the guide plate with the inner wall of distillation column keeps suitable interval contactless each other, set up the via hole that supplies the guide plate to pass on the stereoplasm scraper blade.

Furthermore, the installation guide rail is provided with a plurality of along the circumference of last mount pad and mount pad down, each all be equipped with on the installation guide rail knifing subassembly, and the crisscross setting of knifing subassembly on the different installation guide rails.

Further, the length of the flexible scraper in the axial direction is equal to the length of the hard scraper.

Furthermore, the film scraping assembly further comprises a pressing plate used for fixing the flexible scraping blade, and the pressing plate presses the flexible scraping blade to one side of the hard scraping blade, which is far away from the inner wall of the distillation barrel.

The utility model has the advantages that: the utility model discloses a molecular still adopts the mode that stereoplasm scraper blade and flexible doctor-bar combine to carry out the knifing, stereoplasm scraper blade and distillation column remain the certain distance throughout, the hard contact between the rigid material of avoiding, reduce frictional emergence, flexible doctor-bar and the laminating of distillation column inner wall, the material forms the thick film at first under the effect of stereoplasm scraper blade, form the film under the effect of flexible doctor-bar again, and flexible doctor-bar is furnished with the counter weight strip, under the effect of centrifugal force, the film that flexible doctor-bar formed is more even.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a front view of the present invention;

fig. 2 is a top perspective view of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a schematic structural view of the middle wiping film assembly of the present invention.

Description of reference numerals: the device comprises a distillation cylinder 1, a condenser 2, a film scraper 3, an upper mounting seat 4, a lower mounting seat 5, a mounting guide rail 6, a film scraping component 7, a mounting table 8, a hard scraping plate 9, a flexible scraping plate 10, a rotating shaft 11, a connecting arm 12, a positioning screw hole 13, a counterweight strip 14, a guide plate 15 and a pressing plate 16.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-4, a molecular distiller in this embodiment includes a motor (not shown), a distillation column 1 and a condenser 2, a heating jacket (not shown) is disposed outside the distillation column 1, the condenser 2 is disposed in the distillation column 1, a film scraper 3 is disposed between the condenser 2 and the distillation column 1, the film scraper 3 is driven by the motor to rotate around an axis of the distillation column 1, the film scraper 3 includes an upper mounting seat 4, a lower mounting seat 5 and a plurality of film scraping assemblies 7, and a mounting rail 6 is disposed between the upper mounting seat 4 and the lower mounting seat 5; the knifing subassembly 7 includes mount table 8, stereoplasm scraper blade 9 and flexible doctor-bar 10, mount table 8 is installed on the installation guide rail 6, be equipped with the mounting groove on the mount table 8, one side of stereoplasm scraper blade 9 is located with rotating through pivot 11 in the mounting groove, the tip of mount table 8 is equipped with a plurality of location screw 13, the articulated linking arm 12 that is equipped with of tip of stereoplasm scraper blade 9, linking arm 12 selects to be located arbitrary location screw 13 through positioning bolt, just stereoplasm scraper blade 9 with the inner wall of distillation column 1 keeps suitable interval mutual contactless, stereoplasm scraper blade 9 is close to the fixed setting in one side of distillation column 1 flexible doctor-bar 10, the outside of flexible doctor-bar 10 have the part can with the laminating of distillation column 1 inner wall, the inboard of flexible doctor-bar 10 is equipped with counter weight strip 14.

In the practical implementation process, liquid materials flow down from the top of the distillation barrel 1 along the inner wall, the heating jacket can heat the materials, the motor is started to enable the film scraper 3 to rotate, the hard scraper 9 in the film scraping component 7 keeps a certain distance with the inner wall of the distillation barrel 1 all the time, this distance can be varied by adjusting the connecting arm 12, in particular, by varying the position of the positioning bolt to vary the position of the connecting arm 12, further adjusting the angle between the hard scraper 9 and the mounting platform 8 to change the distance between the edge of the hard scraper 9 and the inner wall of the distillation column 1, thereby adjusting the thickness of the thick film formed by the hard scraper 9, simultaneously driving the flexible scraper 10 to be closer to the inner wall of the distillation barrel 1 as the hard scraper 9 is closer to the inner wall of the distillation barrel 1, enabling the flexible scraper 10 to be more tightly attached to the inner wall of the distillation barrel 1, and enabling the formed thin film to be thinner, while the weight bar 14 on the flexible blade 10 is pressed further against the flexible blade 10 by centrifugal force.

In this embodiment, still be equipped with guide plate 15 on the mount table 8, guide plate 15 is inserted and is established on the mount table 8, just guide plate 15 has inclination with the direction of motion of mount table 8, guide plate 15 with the inner wall of distillation column 1 keeps suitable interval contactless each other, set up the via hole that supplies guide plate 15 to pass on the stereoplasm scraper blade 9, specifically, the material forces the downstream under the effect of guide plate 15, improves the flow rate of commodity circulation, and then raises the efficiency.

In this embodiment, the installation guide rails 6 are provided with a plurality of installation guide rails 6 along the circumferential direction of the upper installation base 4 and the lower installation base 5, each installation guide rail 6 is provided with the film scraping assemblies 7, and the film scraping assemblies 7 on different installation guide rails 6 are arranged in a staggered manner.

In the present embodiment, the length of the flexible blade 10 in the axial direction is equal to the length of the hard blade 9.

In this embodiment, the scraping film assembly 7 further includes a pressing plate 16 for fixing the flexible scraper 10, and the pressing plate 16 presses the flexible scraper 10 to a side of the hard scraper 9 away from the inner wall of the distillation column 1.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a molecular distiller, includes motor, distillation column and condenser, the distillation column outside is equipped with heating jacket, the condenser is located in the distillation column, the condenser with be equipped with the knifing device between the distillation column, the knifing device by motor drive winds the distillation column axis rotates its characterized in that: the film scraping device comprises an upper mounting seat, a lower mounting seat and a plurality of film scraping assemblies, and a mounting guide rail is arranged between the upper mounting seat and the lower mounting seat; the knifing subassembly includes mount table, stereoplasm scraper blade and flexible doctor-bar, the mount table is installed on the installation guide rail, be equipped with the mounting groove on the mount table, one side of stereoplasm scraper blade is located with rotating through the pivot in the mounting groove, the tip of mount table is equipped with a plurality of location screws, the articulated linking arm that is equipped with of tip of stereoplasm scraper blade, the linking arm selects a location in arbitrary location screw through positioning bolt, just the stereoplasm scraper blade with the inner wall of distillation column keeps suitable interval contactless each other, the stereoplasm scraper blade is close to one side of distillation column is fixed to be set up flexible doctor-bar, the outside of flexible doctor-bar have the part can with the laminating of distillation column inner wall, the inboard of flexible doctor-bar is equipped with the counter weight strip.

2. A molecular still according to claim 1 wherein: the distillation column is characterized in that a guide plate is further arranged on the mounting table, the guide plate is inserted into the mounting table and has an inclination angle with the moving direction of the mounting table, the guide plate and the inner wall of the distillation column keep proper intervals and are not in contact with each other, and a through hole for the guide plate to pass through is formed in the hard scraper plate.

3. A molecular still according to claim 1 wherein: the installation guide rail is provided with a plurality of along the circumference of last mount pad and mount pad down, each all be equipped with on the installation guide rail the knifing subassembly, and the crisscross setting of knifing subassembly on the different installation guide rails.

4. A molecular still according to claim 1 wherein: the length of the flexible scraper in the axial direction is equal to the length of the hard scraper.

5. A molecular still according to claim 1 wherein: the film scraping assembly further comprises a pressing plate used for fixing the flexible scraping blade, and the pressing plate presses the flexible scraping blade to one side, far away from the inner wall of the distillation barrel, of the hard scraping blade.