CN110270118B - Horizontal falling film liquid distributor - Google Patents
Horizontal falling film liquid distributor Download PDFInfo
- Publication number
- CN110270118B CN110270118B CN201910633017.3A CN201910633017A CN110270118B CN 110270118 B CN110270118 B CN 110270118B CN 201910633017 A CN201910633017 A CN 201910633017A CN 110270118 B CN110270118 B CN 110270118B
- Authority
- CN
- China
- Prior art keywords
- liquid
- liquid distribution
- pipe
- overflow
- falling film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000007788 liquid Substances 0.000 title claims abstract description 162
- 239000011552 falling film Substances 0.000 title claims abstract description 28
- 230000007423 decrease Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 6
- 239000010408 film Substances 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0064—Feeding of liquid into an evaporator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
-
- 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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention provides a novel horizontal falling film liquid distributor, which comprises: the liquid inlet pipe is provided with a liquid inlet and is connected with the liquid distribution pipe; the liquid distribution pipe is provided with a guide vane, an overflow groove, an overflow hole, a liquid distribution groove and a liquid distribution hole. Fluid flows into the liquid distribution pipe from the liquid inlet of the liquid inlet pipe, is uniformly distributed into overflow grooves on two sides through the guide vane, flows into the liquid distribution groove from overflow holes on two sides to be gathered after the liquid in the overflow grooves reaches full liquid, finally flows out from the liquid distribution hole and is sprayed to the outer wall surface of the upper pipe of the heat exchange pipe below to form a stable and uniform liquid film. The horizontal falling film evaporation liquid distributor provided by the invention can solve the problem of uneven liquid distribution of the horizontal falling film in the length direction of the pipe, reduce the probability of blocking liquid distribution holes and achieve the effect of uniformly distributing liquid along the length direction of the pipe.
Description
Technical Field
The invention relates to the technical field of falling film evaporation heat exchange, in particular to a horizontal falling film liquid distributor for uniformly distributing liquid.
Background
Compared with the conventional heat exchange equipment, the horizontal falling film type heat exchange equipment has the characteristics of rapid gas-liquid separation, small heat transfer temperature difference, small liquid filling amount, compact structure, large heat exchange area, high heat exchange efficiency and the like, and is widely applied to the fields of sea water desalination, petrochemical industry, refrigeration air conditioning, food pharmacy and the like.
One of the conditions for normal operation of a horizontal tube falling film heat exchanger is that the liquid is uniformly distributed in a film shape to each heat exchange tube and a stable liquid film is maintained continuously and uniformly in the entire circumferential and axial directions of each heat exchange tube. The falling film liquid distributor widely used at present is of a hole plate-shaped primary liquid distribution structure, and the problems are that the orifice flow close to a liquid inlet in the length direction of a pipe is large, the orifice flow far from the liquid inlet is small, the liquid distribution of a fluid medium in the length direction of the pipe is uneven, the heat exchange performance of heat exchange equipment is greatly reduced, even the phenomenon of local dry spots is caused, and the service life of the heat exchange equipment is prolonged.
Disclosure of Invention
In order to solve the problem that the liquid distribution of the horizontal falling film liquid distributor is uneven in the length direction of the pipe, the novel horizontal falling film liquid distributor is provided, so that spray fluid medium can be uniformly distributed on the outer wall surface of the heat exchange pipe in the falling film evaporation process.
The invention provides a horizontal falling film liquid distributor, which comprises a liquid inlet pipe and a liquid distribution pipe, wherein the liquid inlet pipe is connected with the liquid distribution pipe, the hollow part of the liquid inlet pipe is a liquid inlet, and two ends of the liquid distribution pipe are sealed; a guide vane is arranged below the liquid inlet along the axial direction of the liquid distribution pipe, the guide vane is connected with two ends of the liquid distribution pipe, and gaps exist between two sides of the guide vane and the liquid distribution pipe shell; overflow grooves which are arranged along the axial direction of the liquid distribution pipe are respectively arranged below two sides of the guide vane, and a plurality of liquid distribution grooves along the axial direction of the liquid distribution pipe are arranged between the two overflow grooves; an overflow hole is respectively arranged between the liquid distribution groove and the two overflow grooves, and a liquid distribution hole is arranged at the bottom of the liquid distribution groove.
Further, the two overflow grooves are symmetrically arranged along the liquid distribution pipe axis.
Further, the liquid inlet pipe and the liquid distribution pipe are both cylindrical.
Further, the guide vane is symmetrical relative to the axis of the liquid inlet pipe.
Further, the width of the overflow groove is larger than the interval between the guide vane and the shell gap of the liquid distribution pipe.
Further, the liquid distribution groove is conical, and the radius gradually decreases from the top to the bottom.
Further, the liquid distribution groove is positioned in the middle of the overflow grooves at two sides.
Further, the liquid distribution hole is positioned at the right middle position of the liquid distribution groove.
Further, the aperture of the liquid distribution holes is smaller than or equal to the minimum distance at the bottom of the liquid distribution groove.
Further, the overflow holes are square or arc-shaped.
The invention uses the guide vane to combine with the overflow hole grooves on two sides and the middle liquid distribution hole groove to replace the traditional orifice plate one-time liquid distribution mode, after fluid flows into the liquid distribution pipe from the liquid inlet of the liquid inlet pipe, the fluid is uniformly distributed into the overflow grooves on two sides through the guide vane, when the liquid in the overflow groove reaches full liquid, the liquid flows into the liquid distribution groove from the overflow holes on two sides, a section of liquid column is formed by aggregation in the liquid distribution groove, a certain static pressure is provided, and finally the liquid flows out from the liquid distribution hole, so that the liquid is uniformly sprayed to the outer wall surface of the heat exchange pipe below along the length direction of the pipe, and a stable and uniform liquid film is formed. The invention solves the problem of uneven liquid distribution of the horizontal falling film in the length direction of the pipe, and reduces the probability of liquid distribution hole blockage.
Drawings
FIG. 1 is a front view of a cross section of a horizontal falling film liquid distributor in an embodiment of the present invention;
FIG. 2 is a cross-sectional top view of a horizontal falling film liquid distributor in an embodiment of the present invention;
FIG. 3 is a cross-sectional side view of a horizontal falling film liquid distributor in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a horizontal falling film liquid distributor according to an embodiment of the present invention.
1. Liquid inlet pipe 2, liquid inlet, 3, liquid distribution pipe, 4, guide vane, 5, overflow groove, 6, overflow hole, 7, liquid distribution groove, 8, liquid distribution hole.
Detailed Description
In order to make the technical means, creation characteristics, achievement purposes and effects of the present application easy to understand, the following embodiments specifically describe the horizontal falling film liquid distributor of the present application with reference to the accompanying drawings. It should be understood that these examples are merely illustrative of the novel implementation and are not intended to limit the scope of the present application. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present application, and such equivalents are intended to fall within the scope of the application as defined in the appended claims.
As shown in figures 1-4, the novel horizontal falling film liquid distributor comprises a liquid inlet pipe 1, a liquid inlet 2, a liquid distribution pipe 3, a guide vane 4, an overflow groove 5, an overflow hole 6, a liquid distribution groove 7 and a liquid distribution hole 8. The liquid inlet pipe 1 and the liquid distribution pipe 3 are cylindrical, the liquid inlet pipe 1 is vertically arranged on the liquid distribution pipe 3 and is communicated with the liquid distribution pipe 3, the hollow part of the liquid inlet pipe 1 is a liquid inlet 2, and two ends of the liquid distribution pipe 3 are sealed. The guide vane 4 is positioned right below the liquid inlet 2 and is symmetrical relative to the axis of the liquid inlet pipe 1, the guide vane 4 is connected with two end surfaces of the liquid distribution pipe 3 into a whole along the axial direction of the liquid distribution pipe 3, and a gap of 2mm exists between the two end surfaces of the guide vane 4 along the radial direction and the shell of the liquid distribution pipe 3. Two overflow grooves 5 are respectively arranged below the radial two end surfaces of the guide vane 4, the overflow grooves 5 are axially symmetrically arranged along the liquid distribution pipe 3, the top end position of each overflow groove 5 is lower than the lowest position of the guide vane 4 by 1mm, and the width of each overflow groove 5 is larger than the gap between the guide vane 4 and the shell of the liquid distribution pipe 3 by 1mm. A row of 15 liquid distribution tanks 7 are uniformly arranged in the middle of the overflow tank, and square overflow holes 6 with the size of 1mm and the side length are respectively formed between the liquid distribution tanks 7 and the tops of the overflow tanks 5 on two sides. The liquid distribution groove 7 is conical with the top gradually reduced from the bottom, the liquid distribution hole 8 is arranged at the center of the bottom, the aperture of the liquid distribution hole 8 is 1mm, and the distance between the top end and the low end of the liquid distribution hole 8 is 2mm.
The working process of the horizontal falling film liquid distributor in the embodiment is as follows: fluid flows into the liquid distribution pipe 3 from the liquid inlet 2 of the liquid inlet pipe 1, is uniformly distributed into the overflow grooves 5 on the two sides through the guide plates 4, flows into the liquid distribution groove 7 from the overflow holes 6 on the two sides after the overflow grooves 5 are full of liquid, and flows out of the heat exchange pipes distributed below from the liquid distribution holes 8 after a section of liquid column is formed by aggregation in the liquid distribution groove 7.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (6)
1. The horizontal falling film liquid distributor is characterized by comprising a liquid inlet pipe (1) and a liquid distribution pipe (3), wherein the liquid inlet pipe (1) is connected with the liquid distribution pipe (3), the hollow part of the liquid inlet pipe (1) is a liquid inlet (2), and two ends of the liquid distribution pipe (3) are sealed; a guide vane (4) is arranged below the liquid inlet (2) along the axial direction of the liquid distribution pipe (3), the guide vane (4) is connected with two ends of the liquid distribution pipe (3), and gaps exist between two sides of the guide vane (4) and the shell of the liquid distribution pipe (3); overflow grooves (5) which are arranged along the axial direction of the liquid distribution pipe (3) are respectively arranged below two sides of the guide vane (4), and a plurality of liquid distribution grooves (7) along the axial direction of the liquid distribution pipe (3) are arranged between the two overflow grooves (5); the liquid distribution groove (7) and the two overflow grooves (5) are respectively provided with an overflow hole (6), the bottom of the liquid distribution groove (7) is provided with a liquid distribution hole (8), the liquid distribution groove (7) is conical, the radius of the liquid distribution groove gradually decreases from the top to the bottom, the two overflow grooves (5) are symmetrically arranged along the axial direction of the liquid distribution pipe (3), the liquid inlet pipe (1) and the liquid distribution pipe (3) are both cylindrical, and the flow guide sheet (4) is symmetrical relative to the axis of the liquid inlet pipe (1).
2. The horizontal falling film liquid distributor as claimed in claim 1, wherein the width of the overflow groove (5) is larger than the interval between the guide vane (4) and the shell gap of the liquid distribution pipe (3).
3. The horizontal falling film liquid distributor as claimed in claim 1, wherein the liquid distributor (7) is positioned in the middle of the overflow grooves (5) at two sides.
4. The horizontal falling film liquid distributor as claimed in claim 1, wherein the liquid distributing hole (8) is positioned at the middle position of the liquid distributing groove (7).
5. The horizontal falling film liquid distributor as claimed in claim 1 or 4, wherein the aperture of the liquid distributing hole (8) is smaller than or equal to the minimum distance of the bottom of the liquid distributing groove (7).
6. The horizontal falling film liquid distributor as claimed in claim 1, wherein the overflow hole (6) is square or arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910633017.3A CN110270118B (en) | 2019-07-12 | 2019-07-12 | Horizontal falling film liquid distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910633017.3A CN110270118B (en) | 2019-07-12 | 2019-07-12 | Horizontal falling film liquid distributor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110270118A CN110270118A (en) | 2019-09-24 |
| CN110270118B true CN110270118B (en) | 2024-07-16 |
Family
ID=67964363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910633017.3A Active CN110270118B (en) | 2019-07-12 | 2019-07-12 | Horizontal falling film liquid distributor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110270118B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111661888B (en) * | 2020-06-15 | 2022-07-05 | 方诺传热系统(江苏)有限公司 | Falling film type air cooler based on evaporative air cooling technology and wastewater treatment process |
| CN115597153A (en) * | 2022-10-28 | 2023-01-13 | 珠海格力电器股份有限公司（Cn） | Wet curtain liquid distributor and evaporative cooler comprising same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207071226U (en) * | 2017-08-15 | 2018-03-06 | 上海理工大学 | A kind of dripping type falling film evaporation liquid distributor |
| CN210674258U (en) * | 2019-07-12 | 2020-06-05 | 东华大学 | Horizontal falling film liquid distributor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203568874U (en) * | 2013-09-29 | 2014-04-30 | 广州中国科学院先进技术研究所 | Pipe-type liquid distributor used for falling film evaporator |
| CN103727707A (en) * | 2013-12-30 | 2014-04-16 | 麦克维尔空调制冷(武汉)有限公司 | Full-falling-film evaporator with double refrigerant distribution devices |
| CN104307192B (en) * | 2014-10-11 | 2016-06-15 | 沈阳航空航天大学 | Uniform overflow-type liquid distribution trough |
| CN204142085U (en) * | 2014-10-15 | 2015-02-04 | 常州托普节能设备有限公司 | The liquid distribution trough of film-lowering type heat exchanger |
| CN204275541U (en) * | 2014-11-25 | 2015-04-22 | 石家庄东华金龙化工有限公司 | A kind of methanol rectifying tower distributor |
| CN205216232U (en) * | 2015-11-30 | 2016-05-11 | 重庆天奕恒化科技有限公司 | Falling film evaporator |
-
2019
- 2019-07-12 CN CN201910633017.3A patent/CN110270118B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207071226U (en) * | 2017-08-15 | 2018-03-06 | 上海理工大学 | A kind of dripping type falling film evaporation liquid distributor |
| CN210674258U (en) * | 2019-07-12 | 2020-06-05 | 东华大学 | Horizontal falling film liquid distributor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110270118A (en) | 2019-09-24 |
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