CN209068810U - Falling film evaporator - Google Patents
Falling film evaporator Download PDFInfo
- Publication number
- CN209068810U CN209068810U CN201822000197.5U CN201822000197U CN209068810U CN 209068810 U CN209068810 U CN 209068810U CN 201822000197 U CN201822000197 U CN 201822000197U CN 209068810 U CN209068810 U CN 209068810U
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- China
- Prior art keywords
- heat exchanging
- liquid
- distributing plate
- shell
- exchanging fluid
- Prior art date
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- 239000011552 falling film Substances 0.000 title abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 239000012530 fluid Substances 0.000 claims description 39
- 230000008676 import Effects 0.000 claims description 17
- 238000002386 leaching Methods 0.000 claims description 14
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 239000010408 film Substances 0.000 abstract description 32
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000009841 combustion method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a falling film evaporator, include: the heat exchange cavity is provided with a plurality of film falling regions at intervals from top to bottom, each film falling region is internally provided with a plurality of heat exchange tubes, and at least two adjacent film falling regions are provided with a liquid equalizing plate. The length range of the liquid equalizing plate is 1/3-2/3 of the length of the heat exchange cavity, and a distance is arranged between at least one end of the liquid equalizing plate and the heat exchange cavity to form a gas circulation area. The utility model discloses can effectively improve the whole heat exchange efficiency of evaporimeter.
Description
Technical field
The utility model relates to vaporizer technology field more particularly to a kind of downward film evaporators.
Background technique
Downward film evaporator has been widely used at present in the industry such as refrigeration, chemistry, common downward film evaporator
The horizontal tube falling film formula evaporator of mostly horizontal placement manages outer liquid film and intraductal heat exchange fluid heat transfer during falling film evaporation
While and flowing air heat-exchange, the presence for managing outer liquid film is the important medium persistently carried out that exchanges heat.
As shown in Figure 1, to keep efficient heat transfer mass transfer, 4 surface of heat exchanger tube must have uniform complete liquid film, the prior art
In horizontal positioned liquid-distributing plate 5 is mostly installed inside downward film evaporator, be mounted between the tube side in each falling liquid film area, liquid-distributing plate
5 length and the cavity length of shell 1 are almost the same, and since falling liquid film area has that Local Heat Transfer effect is poor, use is whole
Block liquid-distributing plate 5 is unable to improve the situation of Local Heat Transfer unevenness inside heat exchanger.Simultaneously as in shell 1 gas evaporation direction and
Liquid drippage is contrary, and the arrangement of monolith liquid-distributing plate is affected to the circulation up and down of gas, is piled up in gas
Below liquid plate, the falling film evaporation of lower end tube side both it had been unfavorable for, and had also been unfavorable for liquid and is fallen from the through-hole on liquid-distributing plate 5, had influenced
Liquid effect and heat exchange property.
Therefore, how to design a kind of better downward film evaporator of heat exchange property is industry technical problem urgently to be resolved.
Utility model content
Have the defects that heat exchange property is low to solve existing downward film evaporator, uses plate the utility model proposes a kind of
The downward film evaporator of block liquid-distributing plate.
The technical solution adopted in the utility model is to design a kind of downward film evaporator, comprising: inside is equipped with heat exchanging chamber
Shell, the inlet set on case top and gas outlet, heat exchanging chamber are from top to bottom arranged at intervals with multiple falling liquid film areas, each falling liquid film
It is equipped with several heat exchanger tubes in area, liquid-distributing plate is equipped between at least two adjacent falling liquid film areas.Wherein, the length of liquid-distributing plate
Between the 1/3 to 2/3 of heat exchange cavity length, liquid-distributing plate is equipped with spacing and forms gas stream range at least between one end and heat exchanging chamber
Logical area.
Preferably, heat exchanger tube is arranged along the length direction of shell, and the length direction of shell is parallel to the horizontal plane.
In a preferred embodiment, one end of shell is equipped with heat exchanging fluid import and heat exchanging fluid exports, into heat exchanging fluid
The heat exchanging fluid of import by heat exchanger tube be transported to heat exchanging fluid outlet, liquid-distributing plate be mounted in heat exchanging chamber far from heat exchanging fluid into
One end of mouth.
Preferably, shell is in hollow cylindrical shape, and the length direction of liquid-distributing plate and the axis of shell are parallel.
Preferably, liquid-distributing plate is horizontally arranged in shell.
Preferably, drop leaching hole, the back taper that drop leaching hole diametrically gradually decreasees from top to bottom are placed on liquid-distributing plate.
Preferably, the diameter range in drop leaching hole is in 1mm between 10mm.
Preferably, it is two neighboring drop leaching hole between center away from range in 5mm between 40mm.
Preferably, the shape of liquid-distributing plate is rectangle, diamond shape, square, ellipse, circle, parallelogram and changeable
Any one of shape.
In an alternative embodiment, one end of shell is equipped with heat exchanging fluid import and heat exchanging fluid exports, into heat exchanging fluid
The heat exchanging fluid of import is transported to heat exchanging fluid outlet by heat exchanger tube, and liquid-distributing plate is mounted on the middle position or close of heat exchanging chamber
One end of heat exchanging fluid import.
Compared with prior art, the liquid-distributing plate length of the utility model is the 1/3 to 2/3 of heat exchange cavity length, and liquid-distributing plate can
The regional area of cloth liquid unevenness is set, the fluid distrbution in falling liquid film area more evenly, is significantly reduced heat exchanger tube dry combustion method phenomenon, and
There is very big spacing between liquid-distributing plate and heat exchanging chamber and form gas Circulation Area, does not influence the gas flowing in heat exchanging chamber, improve
The overall heat exchange efficiency of evaporator.
Detailed description of the invention
The utility model is described in detail below with reference to embodiment and attached drawing, in which:
Fig. 1 is the structural schematic diagram of downward film evaporator in the prior art；
Fig. 2 is the structural schematic diagram of preferred embodiment in the utility model；
Fig. 3 is a kind of structural schematic diagram of alternative embodiment in the utility model；
Fig. 4 is the structural schematic diagram of another alternative embodiment in the utility model；
Fig. 5 is that liquid-distributing plate shape is rectangular structural schematic diagram in the utility model；
Fig. 6 is that individually drop drenches the schematic shapes in hole in the utility model.
Specific embodiment
As shown in Fig. 2, the utility model proposes downward film evaporator, comprising: shell 1, the inside of shell 1 are equipped with heat exchange
Chamber 2, the top of shell 1 is equipped with the inlet 3 of connection heat exchanging chamber 2 and gas outlet, heat exchanging chamber 2 are from top to bottom arranged at intervals with multiple
Falling liquid film area is equipped with several heat exchanger tubes 4, the horizontal placement of shell 1 in each falling liquid film area, and length direction is parallel to the horizontal plane,
Heat exchanger tube 4 is arranged along the length direction of shell 1, and liquid-distributing plate 5 is equipped between at least two adjacent falling liquid film areas, liquid-distributing plate 5
Edge is equipped with baffle.
As shown in Fig. 2, liquid-distributing plate 5 is horizontally arranged in shell 1, the length range of liquid-distributing plate 5 is the three of 2 length of heat exchanging chamber
2/1 mono- to three, it is equipped with spacing between at least one end of liquid-distributing plate 5 and heat exchanging chamber 2 and forms gas Circulation Area, liquid-distributing plate 5
The gas of lower section falling liquid film area evaporation travels up to gas outlet from gas Circulation Area, and gas flowing is stablized smooth in heat exchanging chamber 2, no
The normal cloth liquid of liquid-distributing plate 5 is influenced, the equal liquid effect of liquid-distributing plate 5 and the heat exchange property of evaporator are improved.
In a preferred embodiment, shell 1 is in hollow cylindrical shape, and the length direction of liquid-distributing plate 5 and the axis of shell 1 are flat
Row, one end of shell 1 are equipped with heat exchanging fluid import 6 and heat exchanging fluid outlet 7, and heat exchanging fluid outlet 7 is located at heat exchanging fluid import 6
Top, into heat exchanging fluid import 6 heat exchanging fluid by heat exchanger tube 4 be transported to heat exchanging fluid outlet 7, liquid-distributing plate 5 install
Far from one end of heat exchanging fluid import 6 in heat exchanging chamber 2, due to one end in heat exchanging chamber 2 close to heat exchanging fluid import 6, heat exchange
Heat exchanging fluid in pipe 4 and the liquid temperature differential outside heat exchanger tube 4 are larger, and heat exchange efficiency is higher, and far from heat exchanging fluid in heat exchanging chamber 2
One end of import 6, the heat exchanging fluid in heat exchanger tube 4 and the liquid temperature differential outside heat exchanger tube 4 are smaller, and heat exchange efficiency is lower, therefore
Liquid plate 5 is mounted on heat exchange efficiency lower region, and the liquid in the region can be made more to refine and be evenly distributed in 4 outer wall of heat exchanger tube
On, to effectively improve heat exchange efficiency, balance the heat transfer effect of entire heat exchanging chamber 2.
Certainly, in practical application, as shown in Figure 3,4, liquid-distributing plate 5 also may be mounted at the middle position of heat exchanging chamber 2 or lean on
One end of nearly heat exchanging fluid import 6, can also be arranged the liquid-distributing plate 5 of more than two quantity, between two neighboring falling liquid film area
Liquid plate 5 is from top to bottom intervally arranged, and neighbouring liquid-distributing plate 5 is mounted on the different location on 2 length direction of heat exchanging chamber, gas
Body can be flowed up from the hollow region between liquid-distributing plate 5.
As shown in Figure 5,6, make the 5 more uniform refinement of cloth liquid of liquid-distributing plate to improve, drop leaching hole 8 be placed on liquid-distributing plate 5,
The back taper that drop leaching hole 8 diametrically gradually decreasees from top to bottom, liquid is low downwards in superfine threadiness, on 4 outer wall of heat exchanger tube
Liquid film more it is thin more evenly.Wherein, for the diameter range in drop leaching hole 8 in 1mm between 10mm, drop within this range drenches 8 cloth of hole
Liquid effect is more preferable, the center between two neighboring drop leaching hole 8 away from range in 5mm between 40mm, to prevent drop leaching 8 spacing mistake of hole
4 dry combustion method of heat exchanger tube is caused greatly.
It is additionally provided with liquid distributor 9 to guarantee heat transfer effect, in heat exchanging chamber 2, liquid distributor 9 is located at the top in falling liquid film area, top layer,
Liquid into inlet 3 is fallen into liquid distributor 9, the falling liquid film area of lower section is evenly distributed on by liquid distributor 9, below falling liquid film area
Liquid-distributing plate 5 collects secondary uniform cloth liquid after liquid.It should be noted that the shape of liquid-distributing plate 5 be rectangle, diamond shape, square,
Ellipse, round, parallelogram and shape changeable etc., drop leaching hole 8 also can be set ovalisation, diamond shape, rectangle, circle or
Positive cone etc..
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (12)
1. a kind of downward film evaporator, comprising: inside is equipped with the shell (1) of heat exchanging chamber (2), is set at the top of the shell (1)
Inlet (3) and gas outlet, the heat exchanging chamber (2) are from top to bottom arranged at intervals with multiple falling liquid film areas, in each falling liquid film area
Several heat exchanger tubes (4) are equipped with, are equipped with liquid-distributing plate (5) between at least two adjacent falling liquid film areas, which is characterized in that described
The length of liquid-distributing plate (5) be less than or equal to the heat exchanging chamber (2) length 2/3, the liquid-distributing plate (5) at least one end with it is described
It is equipped with spacing between heat exchanging chamber (2) and forms gas Circulation Area.
2. downward film evaporator as described in claim 1, which is characterized in that the length of the liquid-distributing plate (5) is greater than or equal to
The 1/3 of heat exchanging chamber (2) length.
3. downward film evaporator as described in claim 1, which is characterized in that length of the heat exchanger tube (4) along the shell (1)
Direction setting is spent, the length direction of the shell (1) is parallel to the horizontal plane.
4. downward film evaporator as claimed in claim 3, which is characterized in that one end of the shell (1) is equipped with heat exchanging fluid
Import (6) and heat exchanging fluid outlet (7), the heat exchanging fluid into the heat exchanging fluid import (6) are transported by the heat exchanger tube (4)
Send to the heat exchanging fluid export (7), the liquid-distributing plate (5) be mounted in the heat exchanging chamber (2) far from the heat exchanging fluid into
One end of mouth (6).
5. such as the described in any item downward film evaporators of Claims 1-4, which is characterized in that the shell (1) is in hollow circle
The length direction of tubular, the liquid-distributing plate (5) is parallel with the axis of the shell (1).
6. such as the described in any item downward film evaporators of Claims 1-4, which is characterized in that the liquid-distributing plate (5) is horizontally mounted
In the shell (1).
7. downward film evaporator as claimed in claim 6, which is characterized in that the edge of the liquid-distributing plate (5) is equipped with gear
Plate.
8. downward film evaporator as claimed in claim 6, which is characterized in that be placed with drop leaching hole on the liquid-distributing plate (5)
(8), the back taper that drop leaching hole (8) diametrically gradually decreasees from top to bottom.
9. downward film evaporator as claimed in claim 8, which is characterized in that it is described drop leaching hole (8) diameter range 1mm extremely
Between 10mm.
10. downward film evaporator as claimed in claim 8, which is characterized in that between two neighboring drop leaching hole (8)
The heart is away from range in 5mm between 40mm.
11. downward film evaporator as claimed in claim 3, which is characterized in that one end of the shell (1) is equipped with heat exchanging fluid
Import (6) and heat exchanging fluid outlet (7), the heat exchanging fluid into the heat exchanging fluid import (6) are transported by the heat exchanger tube (4)
It send to the heat exchanging fluid and exports (7), the liquid-distributing plate (5) is mounted on the middle position of the heat exchanging chamber (2) or close to described
One end of heat exchanging fluid import (6).
12. downward film evaporator as described in claim 1, which is characterized in that the shape of the liquid-distributing plate (5) be rectangle,
Any one of diamond shape, square, ellipse, circle, parallelogram and shape changeable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822000197.5U CN209068810U (en) | 2018-11-30 | 2018-11-30 | Falling film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822000197.5U CN209068810U (en) | 2018-11-30 | 2018-11-30 | Falling film evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209068810U true CN209068810U (en) | 2019-07-05 |
Family
ID=67100943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822000197.5U Active CN209068810U (en) | 2018-11-30 | 2018-11-30 | Falling film evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209068810U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282530A (en) * | 2018-11-30 | 2019-01-29 | 珠海格力电器股份有限公司 | Falling film evaporator |
-
2018
- 2018-11-30 CN CN201822000197.5U patent/CN209068810U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282530A (en) * | 2018-11-30 | 2019-01-29 | 珠海格力电器股份有限公司 | Falling film evaporator |
| CN109282530B (en) * | 2018-11-30 | 2024-05-07 | 珠海格力电器股份有限公司 | Falling film evaporator |
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