CN217246834U - Forced rotation film evaporator and film evaporation system - Google Patents

Abstract

The utility model belongs to the technical field of the film evaporator, a force rotatory film evaporator and film evaporation system is disclosed. The forced rotating film evaporator comprises an evaporation cylinder body, a heating pipe and a distribution chamber, wherein the heating pipe is arranged in the evaporation cylinder body and is communicated with the distribution chamber, a plug is arranged in the distribution chamber, one end of the plug is embedded in the heating pipe, a plurality of spiral chamber wire grooves are formed in the circumferential direction of the plug in the axial direction, the spiral chamber wire grooves and the axial direction of the plug are arranged in an included angle mode, and forced rotating flow channels are formed between the spiral chamber wire grooves and the inner wall of the heating pipe. The forced rotation thin film evaporator overcomes the defect that the existing thin film evaporator is not uniform in liquid distribution and easy to dry the wall.

Description

Forced rotation film evaporator and film evaporation system

Technical Field

The utility model relates to a film evaporator technical field especially relates to a force rotatory film evaporator and film evaporation system.

Background

At present, a lot of film evaporators used in laboratories are glass rotary film evaporators, and film evaporators used in factories are classified into climbing film type film evaporators and falling film type film evaporators. The glass rotary film evaporator has the advantages of simple and flexible operation and has the defects of low evaporation speed and small treatment capacity; the advantages of large-scale production of climbing film evaporator are easy operation, easy control of concentration ratio, uniform and reliable liquid distribution in the tube, difficult occurrence of dry wall, certain static pressure effect, rising boiling point of the evaporated material liquid, especially prominent boiling point rising effect during vacuum concentration, and great disadvantages to heat sensitive materials; the falling film evaporator overcomes the hydrostatic pressure effect which raises the boiling point, is suitable for vacuum concentration and concentration of heat-sensitive materials, but is difficult to operate and control, and when the concentration ratio is large, dry wall and coking are easy to occur.

Therefore, a forced rotation thin film evaporator and a thin film evaporation system are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a force rotatory film evaporator and film evaporation system can overcome the shortcoming of the difficult dry wall of falling film evaporator liquid distribution commonly used.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a forced rotation film evaporator, includes evaporation cylinder, heating pipe and distribution room, the heating pipe sets up in the evaporation cylinder, and with distribution room intercommunication, the indoor plug that is provided with of distribution, the one end of plug is inlayed and is established in the heating pipe, spiral thorax wire casing has been seted up along the axial in the week of plug, spiral thorax wire casing with the axial of plug is the contained angle setting, spiral thorax wire casing with form the forced rotation runner between the inner wall of heating pipe.

Preferably, the number of the spiral chamber wire grooves is 2-6.

Preferably, the notch shape of the spiral bore wire casing is a polygon.

Preferably, the evaporation cylinder body is further provided with an upper end plate and a lower end plate, the upper end plate can fix one end, connected with the plug, of the heating pipe, and the lower end plate can fix one end, not connected with the plug, of the heating pipe.

Preferably, the number of the plugging plugs and the number of the heating pipes are the same.

Preferably, a heating cavity is arranged in the evaporation cylinder body, the evaporation cylinder body is close to a first interface arranged on the side wall of the upper end plate, the evaporation cylinder body is close to a second interface arranged on the side wall of the lower end plate, the first interface and the second interface are communicated with the heating cavity, and a first valve is arranged at the first interface.

The utility model provides a film evaporation system, includes concentration pot, condenser and foretell forced rotation film evaporator, be provided with in the concentration pot and hold the chamber, the upper end of concentration pot is provided with third interface and fourth interface, the heating pipe passes through the third interface with hold the chamber intercommunication, the condenser passes through the fourth interface with it is fixed to hold the chamber intercommunication.

Preferably, the concentrating device further comprises a circulating pump, a fifth interface communicated with the accommodating cavity is arranged at the bottom end of the concentrating pot, the input end of the circulating pump is communicated with the fifth interface, and the output end of the circulating pump is communicated with the distribution chamber.

Preferably, a baffle is arranged in the accommodating cavity and located between the third port and the fourth port.

Preferably, the condenser includes condensation barrel and a plurality of condenser pipe, be provided with the condensation chamber in the condensation barrel, it is a plurality of the condenser pipe sets up the condensation barrel, be provided with cooling water inlet, cooling water outlet and solution recovery mouth on the condensation barrel, the cooling water inlet with the one end intercommunication of condenser pipe, the cooling water outlet with the other end intercommunication of condenser pipe, solution recovery mouth with condensation chamber intercommunication, the condenser still includes steam channel, steam channel's one end with condensation chamber intercommunication, the other end with hold the chamber intercommunication.

The utility model has the advantages that:

the utility model provides a forced rotation film evaporator and film evaporation system, form the forced rotation runner between the spiral thorax wire casing of end plug stopper and the inner wall of heating pipe, when using, fill liquid into the distribution chamber and be full of the distribution chamber, fill liquid under the effect of pressure into, liquid is impressed the end plug stopper, spiral thorax wire casing along the end plug stopper flows in the heating pipe with high-speed rotatory mode, under the effect of forced rotation runner, liquid is the heliciform blowout and extends, force on the inner wall of heating pipe and form the liquid film, make the liquid film along the high-speed rotatory evaporation of inner wall top-down of heating pipe. The high-speed rotary motion of the liquid film greatly improves the heat transfer coefficient of the liquid film, the forced rotary film evaporator generates larger evaporation capacity than the common film evaporator under the same heat transfer area, the operation is simple and convenient, the coking can be kept during larger concentration ratio, and the method is very suitable for the concentration and vacuum concentration of heat-sensitive materials, and is particularly suitable for materials which are easy to foam, such as solutions of saponins, proteins and polysaccharides. The forced rotation film evaporator and the film evaporation system can uniformly cover the inner wall of the heating pipe without a scraper and a mechanical rotating shaft, have uniform liquid film, short treatment time and high efficiency, and are suitable for treating heat-sensitive substances.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural view of a forced rotation thin film evaporator provided by the present invention;

fig. 2 is a schematic structural view of the plug of the present invention;

fig. 3 is a schematic diagram of a thin film evaporation system provided by the present invention.

In the figure:

10. evaporating the cylinder; 11. a heating cavity; 12. a first connecting flange; 13. a second connecting flange; 14. a first interface; 15. a second interface; 16. a first valve; 20. an upper end plate; 30. a lower end plate; 40. heating a tube; 50. a distribution chamber; 51. a plug; 52. a helical bore wire slot; 53. forcibly rotating the flow channel;

100. a concentration pot; 101. an accommodating chamber; 102. a third interface; 103. a fourth interface; 104. a fifth interface; 105. a baffle plate; 106. a material inlet; 107. a residual liquid outlet; 200. a circulation pump; 300. a condenser; 301. a condensing cylinder; 302. a condenser tube; 303. a condensing chamber; 304. a cooling water inlet; 305. a cooling water outlet; 306. a solution recovery port; 307. a second valve; 308. a steam channel.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Example one

As shown in fig. 1 and fig. 2, the embodiment provides a forced rotation thin film evaporator, which includes an evaporation cylinder 10, a heating pipe 40 and a distribution chamber 50, wherein the heating pipe 40 is disposed in the evaporation cylinder 10, the heating pipe 40 is communicated with the distribution chamber, a plug 51 is disposed in the distribution chamber 50, one end of the plug 51 is embedded in the heating pipe 40, a plurality of spiral bore line grooves 52 are axially disposed in the circumferential direction of the plug 51, an included angle is formed between the spiral bore line grooves 52 and the axial direction of the plug 51, and a forced rotation flow channel 53 is formed between the spiral bore line grooves 52 and the inner wall of the heating pipe 40.

In the forced rotary thin film evaporator provided by the embodiment, a forced rotary flow channel 53 is formed between the spiral bore line groove 52 of the plug 51 and the inner wall of the heating pipe 40, when in use, liquid is filled into the distribution chamber 50 and fills the distribution chamber 50, the liquid is pressed into the plug 51 under the action of liquid filling pressure, flows into the heating pipe 40 along the spiral bore line groove 52 of the plug 51 in a rotary mode, and is spirally sprayed and extended under the action of the forced rotary flow channel 53, so that a liquid film is forcibly formed on the inner wall of the heating pipe 40, and the liquid film is enabled to be rotated and evaporated from top to bottom at a high speed along the inner wall of the heating pipe 40. The forced rotary film evaporator has the advantages that the heat transfer coefficient of the liquid film is greatly improved due to the high-speed rotary motion of the liquid film, the forced rotary film evaporator generates larger evaporation capacity than a common film evaporator under the same heat transfer area, the operation is simple and convenient, the forced rotary film evaporator can keep no coking when the concentration ratio is larger, and the forced rotary film evaporator is very suitable for the concentration and vacuum concentration of heat-sensitive materials, particularly for materials which are easy to foam, such as solutions of saponins, proteins and polysaccharides. The forced rotation film evaporator can overcome the defect that the conventional falling film evaporator is not uniform in liquid distribution and easy to dry the wall, can enable a liquid film to uniformly cover the inner wall of the heating pipe 40 without arranging a scraper and a mechanical rotating shaft, is short in treatment time and high in efficiency, and is suitable for treating heat-sensitive substances.

The forced rotary film evaporator can be used for evaporation and concentration of biological products, traditional Chinese medicine extracting solutions, fermentation sugar juice industry, fruit juice, beverage industry, milk liquid, vinasse filtrate, pharmaceutical industry, fermentation liquid and chemical wastewater, and has the advantages of short heating time, high applicable viscosity, easiness in foaming and evaporation and concentration of heat-sensitive materials.

Illustratively, the number of the plug plugs 51 in the present embodiment may be specifically selected according to actual requirements, the number of the helical bore line grooves 52 may be 2-6, preferably 3, and the shape of the helical bore line grooves 52 is a polygon, preferably a quadrangle, for example a rectangle.

Optionally, in this embodiment, the upper end of the evaporation cylinder 10 is provided with a first connecting flange 12, and the lower end of the evaporation cylinder 10 is provided with a second connecting flange 13 matching with the first flange 12. By providing the first connecting flange 12 and the second flange 13, the distribution chamber 50 and the evaporation cylinder 10 can be conveniently installed, and the connection stability is high.

Further, an upper end plate 20 and a lower end plate 30 may be disposed on the evaporation cylinder 10, the upper end plate 20 being used for fixing one end of the heating pipe 40, and specifically, the heating pipe 40 may be disposed through the upper end plate 20, so that the upper end plate 20 can communicate the heating pipe 40 with the distribution chamber 50 while fixing the heating pipe 40. The lower end plate 30 is used for fixing the other end of the heating tube 40, and specifically, the heating tube 40 may also be disposed through the lower end plate 30, so that the lower end plate 30 can fix the heating tube 40 without affecting the communication between the heating tube 40 and the outside. In order to improve the connection strength between the heating pipe 40 and the upper end plate 20 and the lower end plate 30, glue may be applied between the upper end plate 20 and the heating pipe 40 and between the lower end plate 30 and the heating pipe 40.

Preferably, the number of the plug plugs 51 and the heating pipes 40 can be multiple, and the number of the plug plugs 51 and the heating pipes 40 is the same because the plug plugs 51 and the heating pipes 40 are used in a matched manner.

In this embodiment, the side wall of the evaporation cylinder 10 close to the upper end plate 20 is provided with a first interface 14, the side wall of the evaporation cylinder 10 close to the lower end plate 30 is provided with a second interface 15, and both the first interface 14 and the second interface 15 are communicated with the heating cavity 11. By arranging the first connector 14 and the second connector 15, the first connector 14 is communicated with a heating medium, such as saturated steam, the saturated steam enters the heating cavity 11 through the first connector 14, the heating pipe 40 is heated by the saturated steam, so that the liquid film is evaporated in a rotating manner from top to bottom along the inner wall of the heating pipe 40 at a high speed, the saturated steam is changed into condensed water after releasing heat, and the condensed water flows out from the second connector 15.

Optionally, the first port 14 is provided with a first valve 16. By arranging the first valve 16, the evaporation capacity of the liquid film in the heating pipe 40 can be controlled or whether evaporation is carried out by controlling the opening degree or opening and closing of the first valve 16, and entrainment can be avoided by controlling the evaporation capacity of the liquid film in the heating pipe 40.

Example two

As shown in fig. 3 and referring to fig. 1, the present embodiment provides a thin film evaporation system, which includes a concentration pan 100, a condenser 300 and the forced rotation thin film evaporator provided in the first embodiment, wherein a containing cavity 101 is provided in the concentration pan 100, a third interface 102 and a fourth interface 103 are provided at an upper end of the concentration pan 100, and a fifth interface 104 is provided at a bottom end of the concentration pan 100. The third port 102, the fourth port 103 and the fifth port 104 are all communicated with the accommodating cavity 101, the third port 102 is communicated with one end of the heating pipe 40 close to the lower end plate 30, and the fourth port 103 is fixedly communicated with the condenser 300.

In the thin film evaporation system provided by the embodiment, when the thin film evaporation system is used, it is confirmed that the distribution chamber 50 is filled with liquid and flows into the heating pipe 40 in a rotating manner along the spiral chamber wire slot 52 of the plug 51 under the action of pressure, then the condenser 300 is opened, finally the first valve 16 is opened slowly, the temperature rising rate is observed, the evaporation amount of a liquid film in the heating pipe 40 is controlled through the first valve 16, and the limit is that no entrainment occurs. After the concentration is completed, the first valve 16 should be closed, and after the temperature is decreased, the circulation pump 200 and the condenser 300 are sequentially closed, so as to avoid coking and blockage in the heating pipe 40. The film evaporation system can overcome the defect that the liquid of the common falling film evaporator is not uniformly distributed and is easy to dry the wall, and the liquid film can uniformly cover the inner wall of the heating pipe 40 without arranging a scraper and a mechanical rotating shaft, so that the treatment time is short, the efficiency is high, and the film evaporation system is suitable for treating heat-sensitive substances.

The film evaporation system can be used for evaporation and concentration of biological products, traditional Chinese medicine extracting solution, fermentation sugar juice industry, fruit juice, beverage industry, milk liquid, vinasse filtrate, pharmaceutical industry, fermentation liquid and chemical wastewater, and has the advantages of short heating time, high applicable viscosity, easiness in foaming and evaporation and concentration of thermosensitive materials.

Preferably, a circulating pump 200 can be further provided, an input end of the circulating pump 200 is communicated with the fifth interface 104, an output end of the circulating pump 200 is communicated with the distribution chamber 50, when the distribution chamber is used, liquid is filled into the accommodating cavity 101, the height of the liquid is preferably not more than half of that of the accommodating cavity 101, then the circulating pump 200 is started, and the circulating pump 200 pumps the liquid into the distribution chamber 50, wherein the pumping pressure can be 0.1-0.4 MPa. The circulating evaporation of the liquid is realized by the circulating pump 200, and the liquid is purified to the required purity.

Preferably, a baffle 105 is disposed in the accommodating cavity 101, and the baffle 105 is located between the third port 102 and the fourth port 103. The liquid film in the heating pipe 40 is evaporated rapidly, and due to the pressurization from the upper part, the vapor formed by the liquid film can only enter the accommodating cavity 101 of the concentrating pan 100 downwards along the heating pipe 40 and continue to move downwards along the baffle 105 until the vapor passes through the bottom end of the baffle 105 and enters the upper part of the other side of the accommodating cavity 101, and enters the condenser 300 through the vapor passage 308. The initial liquid in the containing cavity 101 of the concentrating pan 100 is fed with 1/2 the capacity of the containing cavity 101, and the baffle 105 is arranged, so that the flow path of the vapor formed by the liquid film is longer, and the purity of the obtained vapor is higher. The unevaporated film-forming liquid in the heating pipe 40 falls into the accommodating cavity 101 of the concentrating pan 100 from the third connector 102 along the heating pipe 40, is discharged to the circulating pump 200 through the fifth connector 104, and is pumped into the distribution chamber 50 to continue the next evaporation cycle.

In a specific embodiment, a material inlet 106 is provided on a side wall of the thickener 100, and the material inlet 106 is communicated with the accommodating chamber 101. As evaporation proceeds, fresh liquid can be replenished into the holding chamber 101 through the material inlet 106 and continuously treated by the circulation pump 200 together with the liquid in the chamber of the thickener 100. Finally, after the liquid in the containing cavity 101 of the concentrating pan 100 is detected to be qualified in concentration, the first valve 16 is closed to stop distillation. The bottom end of the thickener 100 is provided with a residual liquid outlet 107, and the residual liquid outlet 107 is communicated with the accommodating chamber 101. Through setting up raffinate export 107, can be after the distillation, with the remaining liquid discharge in the holding chamber 101 of concentrator pan 100, guarantee to hold the cleanness in the chamber 101.

The condenser 300 in this embodiment includes a condensation cylinder 301 and a plurality of condensation pipes 302, a condensation cavity 303 is disposed in the condensation cylinder 301, the condensation pipes 302 are disposed in the condensation cylinder 301, the condensation cylinder 301 is provided with a cooling water inlet 304, a cooling water outlet 305 and a solution recovery port 306, the cooling water inlet 304 is communicated with one end of the condensation pipe 302, the cooling water outlet 305 is communicated with the other end of the condensation pipe 302, the solution recovery port 306 is communicated with the condensation cavity 303, optionally, the solution recovery port 306 may be disposed at the bottom end of the accommodating cavity 101, which is beneficial to completely discharging condensed liquid, the fourth port 103 is fixedly communicated with the condensation pipe 302, specifically, the condensation pipe 302 penetrates through the bottom wall of the condensation cavity 303, a small part of steam coming from the fourth port 103 falls into the concentration pan 100 after being condensed by the condensation pipe 302 at the bottom, the condenser 300 further includes a steam channel 308, one end of the steam channel 308 is communicated with the condensation cavity 303, the other end is communicated with the containing cavity 101, so that a large amount of steam formed by the liquid film enters the condensing cavity 303 through the steam channel 308, cooling water enters the condensing pipe 302 through the cooling water inlet 304 and flows out through the cooling water outlet 305, the cooling water in the condensing pipe 302 circularly flows to continuously cool the condensing cavity 303, and the steam in the condensing cavity 303 forms liquid under the cooling of the condensing pipe 302 and is discharged through the solution recovery port 306.

Optionally, the cooling water inlet 304 is provided with a second valve 307. By providing the second valve 307, the degree of cooling of the condensation duct 302 or whether cooling is performed can be controlled by controlling the opening or closing of the second valve 307.

For ease of understanding, the use of the thin film evaporation system described above will now be briefly described, taking the purification of heat sensitive Polyaspartic Acid Esters (PAE) as an example:

pentanediamine (PDA) (102g, 1mol) was placed in a 1L four-necked flask and cooled to 0 ℃ with an ice-water bath. Diethyl fumarate (516g, 3mol) was placed in a 1L dropping funnel. The dropping funnel was opened under nitrogen protection, diethyl fumarate was slowly added dropwise to the four-necked flask, then the ice-water bath was removed, the reaction system was allowed to warm to room temperature (25-30 ℃) and stirred for 16 hours to give a colorless slightly viscous liquid.

Pumping the colorless slightly viscous liquid into a forced rotary film evaporator of the film evaporation system under the pressure of 0.2MPa by a material transfer pump (the feeding speed is 300g/h), simultaneously enabling the heating temperature in the forced rotary film evaporator to be 120 ℃ and the pressure to be 10Pa, carrying out film evaporation, condensing and removing low boiling point by a condenser 300, discharging low boiling point substances from a solution recovery port 306, circulating the liquid in a concentration pot 100 for 1h by a circulating pump 200, collecting the liquid at the bottom of the concentration pot 100 to obtain 433.7g of transparent yellowish liquid, namely PAE, wherein the yield can reach 97.2%, and the purity is more than 99.6%.

The film evaporation system is fixed on the concentration pot 100 in a whole set, so that the space is saved, the film evaporation system is simple and convenient, and the evaporation efficiency is high.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements, and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides a force rotatory film evaporator, its characterized in that includes evaporation barrel (10), heating pipe (40) and distribution room (50), heating pipe (40) set up in evaporation barrel (10), and with distribution room (50) intercommunication, be provided with in the distribution room (50) plug (51), the one end of plug (51) inlays to be established in the heating pipe (40), spiral thorax wire casing (52) have been seted up along the axial in the circumference of plug (51), spiral thorax wire casing (52) with the axial of plug (51) is the contained angle setting, spiral thorax wire casing (52) with form between the inner wall of heating pipe (40) and force rotatory runner (53).

2. The forced rotary thin film evaporator according to claim 1, wherein the number of the helical hearth wire grooves (52) is 2 to 6.

3. A forced rotating thin film evaporator according to claim 1 wherein the slot shape of the helical bore wire groove (52) is polygonal.

4. A forced-rotation thin-film evaporator according to any one of claims 1 to 3, characterized in that the evaporation cylinder (10) is further provided with an upper end plate (20) and a lower end plate (30), the upper end plate (20) being capable of fixing the end of the heating tube (40) connected to the stopper plug (51), and the lower end plate (30) being capable of fixing the end of the heating tube (40) not connected to the stopper plug (51).

5. A forced-rotation thin-film evaporator according to claim 1, characterized in that the number of the plug plugs (51) and the number of the heating tubes (40) are the same, and the number of the plug plugs (51) and the number of the heating tubes (40) are the same.

6. The forced-rotation thin-film evaporator according to claim 4, characterized in that a heating cavity (11) is arranged in the evaporation cylinder (10), a first interface (14) is arranged on the side wall of the evaporation cylinder (10) close to the upper end plate (20), a second interface (15) is arranged on the side wall of the evaporation cylinder (10) close to the lower end plate (30), the first interface (14) and the second interface (15) are both communicated with the heating cavity (11), and a first valve (16) is arranged at the first interface (14).

7. A thin film evaporation system, which comprises a concentration pan (100), a condenser (300) and the forced rotation thin film evaporator according to any one of claims 1 to 6, wherein a containing cavity (101) is arranged in the concentration pan (100), a third interface (102) and a fourth interface (103) are arranged at the upper end of the concentration pan (100), the heating pipe (40) is communicated with the containing cavity (101) through the third interface (102), and the condenser (300) is communicated and fixed with the containing cavity (101) through the fourth interface (103).

8. The thin film evaporation system of claim 7, further comprising a circulation pump (200), wherein a bottom end of the concentrating pan (100) is provided with a fifth interface (104) communicated with the accommodating cavity (101), an input end of the circulation pump (200) is communicated with the fifth interface (104), and an output end of the circulation pump is communicated with the distribution chamber (50).

9. The thin film evaporation system of claim 8, wherein a baffle (105) is disposed in the accommodating chamber (101), and the baffle (105) is located between the third interface (102) and the fourth interface (103).

10. The thin film evaporation system of claim 8, wherein the condenser (300) comprises a condensation cylinder (301) and a plurality of condensation tubes (302), a condensation cavity (303) is arranged in the condensation cylinder body (301), a plurality of condensation pipes (302) are arranged in the condensation cylinder body (301), the condensing cylinder (301) is provided with a cooling water inlet (304), a cooling water outlet (305) and a solution recovery port (306), the cooling water inlet (304) is communicated with one end of the condensation pipe (302), the cooling water outlet (305) is communicated with the other end of the condensation pipe (302), the solution recovery port (306) is communicated with the condensation cavity (303), the condenser (300) further comprises a steam channel (308), one end of the steam channel (308) is communicated with the condensation cavity (303), and the other end of the steam channel is communicated with the accommodating cavity (101).

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