CN216571566U

CN216571566U - Falling film evaporator

Info

Publication number: CN216571566U
Application number: CN202123041523.5U
Authority: CN
Inventors: 周振江; 丁彭飞; 王贤; 李建峰
Original assignee: Changyi Tianyu Pharmaceutical Co ltd
Current assignee: Changyi Tianyu Pharmaceutical Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-05-24
Anticipated expiration: 2031-12-06

Abstract

The utility model relates to the technical field of medicine production, in particular to a falling film evaporator. Including circulating fan, circulating pipe and back flow, circulating fan installs the left bottom of casing, the bottom of circulating pipe is connected with circulating fan's output, the circulating pipe twines with spiral mode upwards on the lateral wall of casing, the right side top of casing is provided with the circulation mouth, the top and the circulation mouth intercommunication of circulating pipe, the bottom and the outlet duct intercommunication of back flow, the top of back flow and the bottom intercommunication of circulating pipe. This falling film evaporator can discharge steam into the circulating pipe through circulating fan, and steam flows in the circulating pipe and can heat the bottom in the casing outside to improve casing bottom temperature, reduce the inside top of casing and the difference in temperature of below, improve the evaporation effect, and steam passes through the circulating pipe and finally flows into in the casing, heats the tube bank, further reduces the difference in temperature in the casing, thereby improves the concentrated effect of liquid.

Description

Falling film evaporator

Technical Field

The application belongs to the technical field of medicine production, and more specifically relates to a falling film evaporator.

Background

The falling film evaporation is that the feed liquid is added from an upper pipe box of a heating chamber of the falling film evaporator, is uniformly distributed into each heat exchange pipe through a liquid distribution and film forming device, and flows from top to bottom in a uniform film shape under the action of gravity, vacuum induction and airflow. In the flowing process, the shell-pass heating medium is heated and vaporized, the generated steam and the liquid phase enter a separation chamber of an evaporator together, the steam and the liquid are fully separated, and the steam enters a condenser for condensation or enters a next-effect evaporator as the heating medium, so that the multi-effect operation is realized, and the device is widely used in the field of medicine production and processing.

Through retrieval, the Chinese patent with publication number CN207769233U discloses a falling film evaporator, which comprises a case and a control box, wherein the bottom of the control box is fixedly connected with the upper surface of the case, universal wheels are arranged at the bottom of the case, the universal wheels are tightly welded with the outer surface of the bottom of the case, a recovery tank is arranged on the upper surface of the case, and the recovery tank is arranged in the case in a penetrating manner; in the existing falling-film evaporator, in the process of flowing liquid from top to bottom, because a certain temperature difference exists between the upper part and the lower part of the evaporator, and the temperature below the evaporator is lower, the evaporation effect can be influenced when the liquid flows below the evaporator, and the final concentration effect of the liquid is influenced.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a falling film evaporator.

In order to achieve the purpose, the utility model provides the following technical scheme: a falling film evaporator comprises a shell, a feeding barrel, a distributor and a flow divider, wherein a plurality of tube bundles are uniformly arranged inside the shell, the feeding barrel is arranged at the top of the shell, the right side of the feeding barrel is provided with a feeding pipe, the top ends of the tube bundles penetrate through the shell to stretch into the feeding barrel and are communicated with the feeding pipe, the distributor is arranged at the bottom of the shell and is communicated with the inside of the shell, the distributor is communicated with the inside of the shell, the right side of the distributor is provided with a discharging pipe, the tube bundles penetrate through the bottom of the shell and stretch into the inside of the distributor, the bottom ends of the tube bundles are communicated with the discharging pipe, the bottom of the distributor is provided with a liquid discharge pipe, the top of the left side of the shell is communicated with an air inlet pipe, the bottom of the front side of the shell is provided with an air outlet pipe, the right end of the discharging pipe is communicated with the flow divider, the right side of the flow divider is provided with an exhaust pipe, and the bottom of the flow divider is provided with a liquid discharge pipe, the circulating fan is installed at the bottom of the left side of the shell, the bottom end of the circulating fan is connected with the output end of the circulating fan, the circulating fan is wound on the outer side wall of the shell in a spiral upward mode, a circulating port is formed in the top of the right side of the shell, the top end of the circulating fan is communicated with the circulating port, the bottom end of the returning pipe is communicated with the air outlet pipe, and the top end of the returning pipe is communicated with the bottom of the circulating fan.

In order to prevent the backflow, a check valve is arranged in the middle of the backflow pipe.

In order to improve the stability of the air pressure, the air pressure meter is further included and is installed at the bottom end of the circulating pipe.

In order to reduce heat loss, an outer insulating layer is arranged on the outer side of the circulating pipe.

In order to adjust the working power of the circulating fan conveniently, the circulating fan further comprises two temperature monitoring devices, and the two temperature monitoring devices are installed at the top of the left side and the bottom of the right side of the shell respectively.

Preferably, the gas return pipe further comprises a three-way valve, the three-way valve is installed at the joint of the return pipe and the gas outlet pipe, and the front side of the three-way valve is provided with a regulating pipe.

Compared with the prior art, the utility model provides a falling film evaporator which has the following beneficial effects:

this falling film evaporator can discharge steam into the circulating pipe through circulating fan, and steam flows in the circulating pipe and can heat the bottom in the casing outside to improve casing bottom temperature, reduce the inside top of casing and the difference in temperature of below, improve the evaporation effect, and steam passes through in the final inflow casing of circulating pipe, heats the pencil, and simultaneously, the steam of outlet duct exhaust passes through the back flow and gets into the circulating pipe, further reduces the difference in temperature in the casing, thereby improves the concentrated effect of liquid.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic view of the interior of the housing of the present invention;

FIG. 3 is a schematic view of the structure of the outlet pipe and the return pipe of the present invention;

fig. 4 is a schematic cross-sectional view of the housing of the present invention.

The symbols in the drawings illustrate that:

1. a housing; 2. a feeding cylinder; 3. a dispenser; 4. a flow divider; 5. a tube bundle; 6. a feed pipe; 7. a discharge pipe; 8. a liquid discharge pipe; 9. an air inlet pipe; 10. an air outlet pipe; 11. an exhaust pipe; 12. a liquid outlet pipe; 13. a circulating fan; 14. a circulation pipe; 15. a return pipe; 16. a check valve; 17. a barometer; 18. an outer insulation layer; 19. a temperature monitoring device; 20. a three-way valve; 21. and (4) a regulating pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a falling film evaporator comprises a shell 1, a feeding cylinder 2, a distributor 3, a flow divider 4, a circulating fan 13, a circulating pipe 14 and a return pipe 15, wherein a plurality of tube bundles 5 are uniformly installed inside the shell 1, the feeding cylinder 2 is installed on the top of the shell 1, a feeding pipe 6 is arranged on the right side of the feeding cylinder 2, the top ends of the tube bundles 5 penetrate through the shell 1 and extend into the feeding cylinder 2 and are communicated with the feeding pipe 6, the distributor 3 is installed on the bottom of the shell 1, the distributor 3 is communicated with the inside of the shell 1, a discharging pipe 7 is arranged on the right side of the distributor 3, the tube bundles 5 penetrate through the bottom of the shell 1 and extend into the distributor 3, the bottom ends of the tube bundles 5 are communicated with the discharging pipe 7, a liquid discharge pipe 8 is arranged on the bottom of the distributor 3, an air inlet pipe 9 is communicated with the top of the left side of the shell 1, the bottom of the front side of the shell 1 is provided with an air outlet pipe 10, the right end of the discharge pipe 7 is communicated with the flow divider 4, the right side of the flow divider 4 is provided with an exhaust pipe 11, the bottom of the flow divider 4 is provided with a liquid outlet pipe 12, the circulating fan 13 is installed at the left bottom of the shell 1, the bottom end of the circulating pipe 14 is connected with the output end of the circulating fan 13, the circulating pipe 14 is wound on the outer side wall of the shell 1 in a spiral upward mode, the outer side of the circulating pipe 14 is provided with an outer heat preservation layer 18, the outer heat preservation layer 18 can reduce heat loss outside the circulating pipe 14, the top of the right side of the shell 1 is provided with a circulating port, the top end of the circulating pipe 14 is communicated with the circulating port, the bottom end of the return pipe 15 is communicated with the air outlet pipe 10, the top end of the return pipe 15 is communicated with the bottom of the circulating pipe 14, the middle part of the return pipe 15 is provided with a check valve 16, and the check valve 16 can prevent steam of the circulating pipe 14 from being discharged into the return pipe 15 to form reverse circulation, can be with in steam discharge circulation pipe 14 through circulating fan 13, steam flows in circulation pipe 14 and can heat the bottom in the casing 1 outside, thereby improve casing 1 bottom temperature, reduce the difference in temperature of the inside top of casing 1 and below, improve evaporation effect, and steam passes through in circulation pipe 14 finally flows into casing 1, heat tube bank 5, and simultaneously, the steam of outlet duct 10 exhaust passes through back flow 15 and gets into circulation pipe 14, further reduce the difference in temperature in the casing 1, thereby improve the concentrated effect of liquid.

The air pressure meter 17 is arranged at the bottom end of the circulating pipe 14, the air pressure in the circulating pipe 14 can be monitored through the air pressure meter 17, the air pressure in the circulating pipe 14 is kept constant, and therefore the heating effect of the circulating pipe 14 is guaranteed.

Still include two temperature monitoring devices 19 and three-way valve 20, two temperature monitoring devices 19 are installed respectively casing 1's left side top and right side bottom, through the temperature monitoring device 19 to the temperature difference monitoring of casing 1 top and bottom to can adjust circulating fan 13's power, three-way valve 20 is installed the junction of back flow 15 and outlet duct 10, three-way valve 20's front side is provided with adjusting pipe 21, can select through three-way valve 20 whether the steam of casing 1 bottom exhaust participates in the thermal cycle again, thereby improves the flexibility of evaporimeter when using.

The liquid is discharged into the tube bundles 5 through the feeding tube 6 on the feeding barrel 2, the liquid is moved from top to bottom in the tube bundles 5, meanwhile, the steam is discharged into the shell 1 through the air inlet tube 9, the liquid in the tube bundles 5 is evaporated and concentrated, meanwhile, the steam is discharged into the circulating tube 14 through the circulating fan 13, the shell 1 is heated outside, the concentrated liquid after evaporation enters the flow divider 4 through the discharging tube 7 and is discharged through the liquid outlet tube 12 at the bottom of the flow divider 4, the steam in the concentrated liquid is discharged through the exhaust tube 11 of the flow dividing tube, and the condensed water generated by evaporation in the shell 1 is discharged through the liquid outlet tube 12 at the bottom of the flow divider 3.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. A falling film evaporator comprises a shell (1), a feeding barrel (2), a distributor (3) and a flow divider (4), wherein a plurality of tube bundles (5) are uniformly arranged inside the shell (1), the feeding barrel (2) is arranged at the top of the shell (1), a feeding pipe (6) is arranged on the right side of the feeding barrel (2), the top ends of the tube bundles (5) penetrate through the shell (1) to stretch into the feeding barrel (2) and communicate with the feeding pipe (6), the distributor (3) is arranged at the bottom of the shell (1), the distributor (3) is communicated with the inside of the shell (1), a discharging pipe (7) is arranged on the right side of the distributor (3), the tube bundles (5) penetrate through the bottom of the shell (1) and stretch into the inside of the distributor (3), the bottom ends of the tube bundles (5) are communicated with the discharging pipe (7), and a liquid discharging pipe (8) is arranged at the bottom of the distributor (3), the left side top intercommunication of casing (1) is provided with intake pipe (9), and the front side bottom of casing (1) is provided with outlet duct (10), the right-hand member of discharging pipe (7) with shunt (4) intercommunication, the right side of shunt (4) are provided with blast pipe (11), and the bottom of shunt (4) is provided with drain pipe (12), its characterized in that: including circulating fan (13), circulating pipe (14) and back flow (15), circulating fan (13) are installed the left bottom of casing (1), the bottom of circulating pipe (14) is connected with circulating fan's (13) output, circulating pipe (14) twine with spiral mode upwards on the lateral wall of casing (1), the right side top of casing (1) is provided with the circulation mouth, the top and the circulation mouth intercommunication of circulating pipe (14), the bottom and outlet duct (10) the intercommunication of back flow (15), the top of back flow (15) and the bottom intercommunication of circulating pipe (14).

2. The falling film evaporator of claim 1, wherein: the middle part of the return pipe (15) is provided with a check valve (16).

3. A falling film evaporator according to claim 2 wherein: the air pressure meter (17) is further included, and the air pressure meter (17) is installed at the bottom end of the circulating pipe (14).

4. A falling film evaporator according to claim 3 wherein: an outer heat-insulating layer (18) is arranged on the outer side of the circulating pipe (14).

5. The falling film evaporator of claim 4, wherein: the temperature monitoring device is characterized by further comprising two temperature monitoring devices (19), wherein the two temperature monitoring devices (19) are respectively arranged at the top of the left side and the bottom of the right side of the shell (1).

6. The falling film evaporator of claim 5, wherein: still include three-way valve (20), three-way valve (20) are installed the junction of back flow pipe (15) and outlet duct (10), and the front side of three-way valve (20) is provided with adjusting pipe (21).