CN115382231B - Liquid film rotation generator and falling film evaporator - Google Patents
Liquid film rotation generator and falling film evaporator Download PDFInfo
- Publication number
- CN115382231B CN115382231B CN202110561481.3A CN202110561481A CN115382231B CN 115382231 B CN115382231 B CN 115382231B CN 202110561481 A CN202110561481 A CN 202110561481A CN 115382231 B CN115382231 B CN 115382231B
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- Prior art keywords
- liquid
- rotation generator
- guide
- film
- evaporator
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- 239000007788 liquid Substances 0.000 title claims abstract description 95
- 239000010408 film Substances 0.000 title claims abstract description 52
- 239000011552 falling film Substances 0.000 title claims abstract description 18
- 239000000126 substance Substances 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 7
- 239000007791 liquid phase Substances 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000000889 atomisation Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 206010057040 Temperature intolerance Diseases 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008543 heat sensitivity Effects 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
- B01D1/222—In rotating vessels; vessels with movable parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0064—Feeding of liquid into an evaporator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention belongs to the technical field of evaporators, and particularly relates to a liquid film rotation generator and a falling film evaporator. The liquid film rotation generator is arranged at the flow guide pipe orifice and comprises a body matched with the flow guide pipe orifice and a liquid flow groove which is arranged along the side wall of the body and runs in a spiral line. The falling film evaporator comprises a shell, a feed inlet arranged at the upper part of the shell, a feed liquid distributor arranged below the feed inlet in the shell, a plurality of guide pipes connected with the feed liquid distributor, and the liquid film rotation generator arranged at the upper end of the guide pipes. According to the technical scheme provided by the invention, the liquid film which is stable, uniform and thin can be formed by rotating the liquid groove on the side wall, so that the evaporation and separation of the liquid are facilitated, and in addition, the gasified substances can independently overflow through the central airflow cavity, so that the gas-liquid phase is independent in countercurrent, the mutual interference and the obstruction are avoided, and the efficient separation of the liquid through the evaporator is finally realized.
Description
Technical Field
The invention belongs to the technical field of evaporators, and particularly relates to a liquid film rotation generator and a falling film evaporator.
Background
The evaporator heats the solution containing the nonvolatile solute to a boiling state in a heat exchange mode, so that part of the solvent is vaporized and removed, the concentration of the solute in the solvent is improved, and the evaporator has wide application in the fields of medicine, chemical industry, daily chemicals and environmental protection.
The film evaporator is a single-circulation evaporator, and is a novel evaporator designed for solving the problem that the retention time of materials at high temperature is long due to large material stagnation in a heating chamber, and is particularly unsuitable for treating heat-sensitive materials.
In the film evaporator, the solution can be passed through the heating chamber only once to obtain the required composition, and the residence time is only several seconds or more than 10 seconds, so the film evaporator is a single-cycle evaporator.
The solution flows in a film along the tube wall during operation of the film evaporator. The film evaporator is classified into a rising film evaporator and a falling film evaporator. The film in the rising film and the falling film means that raw material liquid flows in a film shape along the pipe wall during the operation of the evaporator.
The falling film evaporator is characterized in that the feed liquid is added from the top of the evaporator, falls in a film shape along the pipe wall under the action of gravity, and is evaporated and enriched in the process, and the concentrated liquid is obtained at the bottom of the falling film evaporator. Because the film forming mechanism is different from that of the climbing film evaporator, the falling film evaporator can evaporate materials with higher concentration, higher viscosity and heat sensitivity.
In a film evaporator, in order to make the feed liquid sufficiently uniform and form a film on the pipe wall sufficiently thin, it is a key to determine the separation effect of different substances in the feed liquid.
In the prior art, a great deal of literature is available for research, and research results are mostly focused on setting material liquid distribution plates with various pore diameters, distribution or structures, such as chinese patent CN204219811 and CN203342404, or the structural design of heat exchange tubes, such as chinese patent CN207694281. However, the mechanism is relatively complex and the film forming effect is not ideal.
Disclosure of Invention
The invention provides a liquid film rotation generator and a falling film evaporator, which are used for solving the problem that the liquid film generation in the existing falling film evaporator is not uniform and light and thin enough.
In order to solve the technical problems, the technical scheme of the invention is as follows: the liquid film rotation generator is arranged at the flow guide pipe orifice and comprises a body matched with the flow guide pipe orifice and a liquid flow groove which is arranged along the side wall of the body and runs in a spiral line.
The liquid material passes through the cylindrical spiral type liquid flow groove, the speed is slowed down, a thin and uniform liquid flow film can be formed in a rotatable mode, and compared with a film forming device in the prior art, the liquid flow film forming device is simple in structure and quite ideal in effect.
Optionally, the side wall of the body is uniformly provided with a plurality of mutually independent liquid flow grooves with identical rotation directions, and the spiral line of each liquid flow groove is opened from the top to the bottom of the body.
Alternatively, when one end and the other end of the liquid flow groove are projected on the same circumference, the radian between the two points is between pi/2 and 2 pi/3.
Optionally, the body is further provided with a limiting table with a diameter larger than that of the body, and a guide opening extends from the joint of the limiting table and the liquid flow notch to the side surface of the limiting table.
Optionally, the guide port is smaller at one end than at the other end where it is connected to the fluid flow slot.
Optionally, the guide opening is in the form of a droplet.
Optionally, the body is hollow to form an airflow cavity, and a channel communicated with the guide port is arranged in the limit table.
The liquid film can be formed by rotationally introducing the feed liquid through the outer wall through the airflow cavity, and meanwhile, the gas evaporated from the guide pipe directly reversely ascends from the airflow cavity and overflows from the guide port, so that the ideal effect of countercurrent gas-liquid and mutual noninterference is realized.
The invention also provides a falling film evaporator which comprises a shell, a feed inlet arranged at the upper part of the shell, a feed liquid distributor arranged below the feed inlet in the shell, a plurality of guide pipes connected with the feed liquid distributor, and the liquid film rotation generator arranged at the upper end of the guide pipes.
Optionally, a funnel-shaped liquid storage cavity is arranged at the top end of the flow guide pipe, and the liquid film rotation generator is arranged at a narrow opening of the liquid storage cavity.
The narrow opening of the liquid storage cavity is closed by the liquid film rotation generator, a small part of liquid is slowly screwed into the guide pipe along with the liquid film rotation generator, and the rest part is left in the liquid storage cavity, so that even if the feeding speed of the liquid is very fast, the liquid can not impact the guide pipe, and the liquid can still form a liquid film through the liquid film rotation generator to enter the guide pipe.
Optionally, an atomization nozzle is arranged on the feeding port.
Liquid particles with small enough particle size can be obtained by passing the liquid through the atomizing nozzle, so that the uniform distribution of the liquid is facilitated, most importantly, the liquid particles can be directly vaporized and lifted without entering a main evaporator for heating in a special hour, vaporization of a phase with a low boiling point is easier to realize, and part of material separation can be realized by means of the nozzle.
Optionally, a liquid-proof layer is arranged between the atomizing nozzle and the exhaust port at the top of the shell.
Because the atomizing nozzle can have the possibility that gas phase and liquid phase substances are upwards moved together, the separation efficiency of the two substances is reduced, the two substances can be effectively separated by adding an anti-flooding layer, the separated gas phase is discharged from the gas outlet, and the liquid phase returns to the main evaporator.
Compared with the prior art, the technical scheme provided by the invention has the following advantages: through the rotatory liquid chute of lateral wall, can form stable even rarefaction liquid film, do benefit to the evaporation separation of feed liquid, the material of gasification realizes independently spilling over through central air current chamber in addition to the gas-liquid is relative independent to flow against each other, and mutual noninterference and hindrance have finally realized that the feed liquid passes through the evaporimeter and have realized high-efficient separation.
Drawings
FIG. 1 is a schematic view of a falling film evaporator according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of the flow guide and film rotation generator according to the present invention;
fig. 3 is a cross-sectional view of the film generator shown in fig. 2.
The figure shows:
11-shell, 12-feed inlet, 13-feed liquid distributor, 14-honeycomb duct, 141-funnel-shaped liquid storage cavity, 15-ultrasonic atomization nozzle, 16-exhaust port, 17-anti-flooding layer;
20-liquid film rotation generator, 21-body, 211-air flow cavity, 212-channel, 22-liquid flow groove, 23-limit table, 24-guiding mouth.
Detailed Description
For ease of understanding, the falling film evaporator with atomizer will be described in connection with the following examples, which are to be understood as merely illustrative of the present invention and are not to be construed as limiting the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions and positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, the falling film evaporator comprises a housing 11, a feed inlet 12 arranged at the upper part of the housing 11, a feed liquid distributor 13 arranged below the feed inlet 12 in the housing 11, a plurality of guide pipes 14 connected with the feed liquid distributor 13, and a liquid film rotation generator 20 arranged at the upper end of the guide pipes 14, wherein an ultrasonic atomization nozzle 15 is arranged on the feed inlet 12, a flooding prevention layer 17 is arranged between the ultrasonic atomization nozzle 15 and an exhaust port 16 at the top of the housing, and the flooding prevention layer 17 is a molecular sieve.
As shown in fig. 2, a funnel-shaped liquid storage cavity 141 is provided at the top end of the flow guiding tube 14, and the liquid film rotation generator is disposed at a narrow opening of the liquid storage cavity 141.
With continued reference to fig. 2, the liquid film rotation generator 20 includes a body 21 matched with the flow guiding tube 14, 4 liquid flow grooves 22 uniformly arranged along the side wall of the body 21 and running in a spiral line, and a limiting table 23 with a diameter larger than that of the body 21, where the limiting table 23 is connected with the opening of the liquid flow groove 22, and a guide opening 24 extends to the side surface of the limiting table 23.
The fluid flow grooves 22 are mutually independent and have consistent rotation directions, the spiral line of each fluid flow groove 22 is opened from the top to the bottom of the body 21,
The arc between the two points is approximately pi/2 when one end and the other end of the flow channel 22 are projected onto the same circumference.
With continued reference to fig. 2, the end of the guide opening 24 connected with the mouth of the liquid flow groove 22 is smaller than the other end, and the guide opening 24 is in a liquid drop shape.
As shown in fig. 3, the body 21 is hollow to form an airflow cavity 211, and a channel 212 is provided in the limiting platform 23, where the airflow cavity 211 is communicated with the guide opening 24.
With continued reference to fig. 3, the liquid solution uniformly rotates through the liquid flow grooves 22 on the outer wall of the liquid film rotation generator 20 to enter the liquid guide pipe 14, a liquid film is formed on the inner wall of the liquid guide pipe 14, after heating in the evaporator, substances with lower boiling points are gasified and pass through the air flow cavity 211 in the center of the liquid film rotation generator 20, and then overflows from the guide port 24 through the channel 212, so that the effect that the gas and liquid flow back is not interfered with each other is achieved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting. Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced with other technical features, which do not depart from the scope of the technical scheme of the embodiments of the present invention.
Claims (6)
1. The liquid film rotation generator is arranged at the guide pipe orifice and is characterized by comprising a body matched with the guide pipe orifice and a liquid flow groove which is arranged along the side wall of the body and runs in a spiral line;
The body is also provided with a limit table with the diameter larger than that of the body, and a guide port extends from the joint of the limit table and the liquid flow notch to the side surface of the limit table;
The body is hollow to form an airflow cavity, and a channel communicated with the guide opening is arranged in the limit table;
one end of the guide opening connected with the liquid flow notch is smaller than the other end of the guide opening.
2. The liquid film rotation generator of claim 1, wherein the body side walls are uniformly arranged with a plurality of mutually independent liquid flow grooves with identical rotation directions, and a spiral line of each liquid flow groove is opened from the top to the bottom of the body.
3. The liquid film rotation generator of claim 1, wherein the arc between two points is between pi/2 and 2 pi/3 when one end and the other end of the liquid flow groove are projected on the same circumference.
4. The film rotation generator of claim 1, wherein the guide is in the form of a droplet.
5. A falling film evaporator, which is characterized by comprising a shell, a feed inlet arranged at the upper part of the shell, a feed liquid distributor arranged below the feed inlet in the shell, a plurality of guide pipes connected with the feed liquid distributor, and the liquid film rotation generator set at the upper end of the guide pipes.
6. The falling film evaporator according to claim 5, wherein a funnel-shaped liquid storage cavity is formed in the top end of the guide pipe, and the liquid film rotation generator is arranged at a narrow opening of the liquid storage cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110561481.3A CN115382231B (en) | 2021-05-22 | 2021-05-22 | Liquid film rotation generator and falling film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110561481.3A CN115382231B (en) | 2021-05-22 | 2021-05-22 | Liquid film rotation generator and falling film evaporator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115382231A CN115382231A (en) | 2022-11-25 |
| CN115382231B true CN115382231B (en) | 2024-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110561481.3A Active CN115382231B (en) | 2021-05-22 | 2021-05-22 | Liquid film rotation generator and falling film evaporator |
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| Country | Link |
|---|---|
| CN (1) | CN115382231B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116459533B (en) * | 2023-04-10 | 2023-09-26 | 苏州冠礼科技有限公司 | Recycling equipment for waste stripping liquid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106178557A (en) * | 2016-08-30 | 2016-12-07 | 洛阳双瑞特种装备有限公司 | A kind of vertical tube falling vaporizer |
| CN208809492U (en) * | 2018-09-11 | 2019-05-03 | 首航洁能科技有限公司 | A kind of liquid distributor applied to falling film evaporator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5588596A (en) * | 1995-05-25 | 1996-12-31 | American Standard Inc. | Falling film evaporator with refrigerant distribution system |
| CN203342399U (en) * | 2013-06-19 | 2013-12-18 | 上海神农机械有限公司 | Shower nozzle type spray distributor for falling film evaporator |
| CN107362560B (en) * | 2016-12-30 | 2023-06-16 | 华北水利水电大学 | Two-phase countercurrent vertical in-tube falling film evaporator with circumferential tangential feeding |
| CN206355614U (en) * | 2017-01-03 | 2017-07-28 | 石家庄市九洲兽药有限公司 | A kind of thin film evaporation enrichment facility |
| CN112093839A (en) * | 2020-08-24 | 2020-12-18 | 河北江水制药设备有限公司 | Novel film-rising energy-saving reinforced combined efficient distilled water machine |
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2021
- 2021-05-22 CN CN202110561481.3A patent/CN115382231B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106178557A (en) * | 2016-08-30 | 2016-12-07 | 洛阳双瑞特种装备有限公司 | A kind of vertical tube falling vaporizer |
| CN208809492U (en) * | 2018-09-11 | 2019-05-03 | 首航洁能科技有限公司 | A kind of liquid distributor applied to falling film evaporator |
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| Publication number | Publication date |
|---|---|
| CN115382231A (en) | 2022-11-25 |
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