CN209204693U - A kind of falling film evaporator that cloth film effect is good - Google Patents
A kind of falling film evaporator that cloth film effect is good Download PDFInfo
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- CN209204693U CN209204693U CN201821119259.8U CN201821119259U CN209204693U CN 209204693 U CN209204693 U CN 209204693U CN 201821119259 U CN201821119259 U CN 201821119259U CN 209204693 U CN209204693 U CN 209204693U
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- heat exchanger
- annular recess
- wall
- exchanger tube
- good
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Abstract
The utility model provides a kind of falling film evaporator that cloth film effect is good, including water distributor and several heat exchanger tubes, the heat exchanger tube upper orifice is annular recess structure, annular recess inner wall is connected with pipe wall of heat exchange pipe, and annular recess inside wall height is lower than annular recess outer wall height, the annular recess structure of water distributor and heat exchanger tube upper orifice communicates；The heat exchanger tube is spirally twisted flat-tube.In the utility model heat exchanger tube upper orifice be annular recess structure make original solution from water distributor flow into heat exchanger tube after be distributed in pipe wall of heat exchange pipe it is more uniform；Spirally twisted flat-tube makes original solution generate Secondary Flow and screw in spiral flow channel, and heat transfer coefficient is higher；After wire mesh grid is set in heat transfer tube wall, using surface tension, original solution can be dispersed into and stablize ultra-thin liquid film, can avoid that dry wall phenomenon occurs when low inlet amount completely.
Description
Technical field
The utility model belongs to vaporizer technology field, in particular to a kind of falling film evaporator that cloth film effect is good.
Background technique
Falling film evaporator principle is that original solution is added by the top of vaporization chamber, after filming device is distributed, under the effect of gravity
It flows downward and is evaporated in membranaceous along wall surface, in the prior art in order to be evenly distributed on original solution in each heat exchanger tube, to cloth
Diaphragm has conducted a thorough research and improves, but does not make research to how being evenly distributed on the tube wall of heat exchanger tube, causes
Original solution is unevenly distributed inside heat exchanger tube, the dry wall of heat exchanger tube inner part；And in the prior art in order to make original solution exchange heat
It is evenly distributed on tube wall, the verticality for exchanging heat pipe is more demanding, it is assumed that heat exchanger tube length 9m, equipment verticality then require
≤ 6. 4mm, device fabrication difficulty are big.
Utility model content
Purpose of utility model: the purpose of this utility model is that in view of the deficiencies of the prior art, providing a kind of cloth film effect
Good falling film evaporator.
The innovative point of the utility model is that original solution can be evenly distributed on the tube wall of heat exchanger tube and is uniformly distributed, cloth film
Effect is good, and the verticality of heat exchanger tube is of less demanding, and manufacture is easy.
Technical solution: in order to reach above-mentioned purpose of utility model, the utility model is such completion, a kind of cloth film effect
The good falling film evaporator of fruit, including water distributor and several heat exchanger tubes, which is characterized in that the heat exchanger tube upper orifice is annular recess
Structure, annular recess inner wall are connected with pipe wall of heat exchange pipe, and annular recess inside wall height is lower than annular recess outer wall height, water distribution
The annular recess structure of device and heat exchanger tube upper orifice communicates；The heat exchanger tube is spirally twisted flat-tube.Heat exchanger tube upper orifice is ring
Shape groove structure, water distributor and annular recess structure communicate, so that original solution flows into annular recess from water distributor, from ring-type
The inner wall of groove overflows, and is evenly distributed on heat exchanger wall pipe；Heat exchanger tube is spirally twisted flat-tube, so that original solution is in spiral
Secondary Flow and screw are generated in shape runner, increases the less turbulence of original solution, play the role of augmentation of heat transfer, and conduct heat
Coefficient is high.
Further, the heat transfer tube wall is equipped with wire mesh grid.On the one hand the influence for utilizing surface tension, can be with
Original solution is dispersed into and stablizes ultra-thin liquid film, can avoid that dry wall phenomenon occurs when low inlet amount completely, on the other hand can change
Heat pipe is more secured, extends the service life of heat exchanger tube.
Further, the wire mesh grid is stainless steel wire grid.It is not easy to be corroded.
Further, the grid of the wire mesh grid is diamond shape, rectangular or round.According to live production situation or reality
Need flexible choice.
Further, the silk of the wire mesh grid is the wave silk of 0.8 ~ 1.5mm.Cloth film effect is more preferable.
The utility model has the beneficial effects that the utility model has the advantages that compared with traditional technology
1, heat exchanger tube upper orifice is that annular recess structure makes original solution flow into heat exchanger tube from water distributor in the utility model
What is be distributed in pipe wall of heat exchange pipe afterwards is more uniform.
2, the spirally twisted flat-tube in the utility model makes original solution generate Secondary Flow and spiral in spiral flow channel
Movement, heat transfer coefficient are higher.
It 3,, can will be former molten using surface tension after wire mesh grid being set in heat transfer tube wall in the utility model
Liquid, which is dispersed into, stablizes ultra-thin liquid film, can avoid that dry wall phenomenon occurs when low inlet amount completely.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of heat exchanger tube.
Fig. 2 is square shape wire mesh grid schematic diagram inside heat exchanger tube.
Specific embodiment
A kind of falling film evaporator that cloth film effect is good, including water distributor and several heat exchanger tubes, heat exchanger tube are helically twisted flat
Pipe, so that original solution generates Secondary Flow and screw in spiral flow channel, increases the less turbulence of original solution, plays
Augmentation of heat transfer effect, and heat transfer coefficient is high.Heat exchanger tube upper orifice is annular recess structure, annular recess inner wall and pipe wall of heat exchange pipe
It is connected, and annular recess inside wall height is lower than annular recess outer wall height, the annular recess knot of water distributor and heat exchanger tube upper orifice
Structure communicates；Heat exchanger tube upper orifice is annular recess structure, and water distributor and annular recess structure communicate, so that original solution is from water distributor
Place flows into annular recess, and the inner wall from annular recess overflows, and is evenly distributed on heat exchanger wall pipe；It is set in heat transfer tube wall
There is a wire mesh grid, the grid of wire mesh grid is diamond shape, rectangular or round, and the optimal silk of wire mesh grid is 0.8 ~ 1.5mm
Wave silk, especially best with stainless steel wire grid, stainless steel wire grid is not easy to be corroded, on inner wall be arranged stainless steel wire grid
The influence for utilizing stainless steel wire grid surface tension afterwards, original solution can be dispersed into and stablize ultra-thin liquid film, can avoided completely
Dry wall phenomenon occurs when low inlet amount, heat exchanger tube can also be made more secured, extends the service life of heat exchanger tube.
Claims (5)
1. a kind of falling film evaporator that cloth film effect is good, including water distributor and several heat exchanger tubes, which is characterized in that the heat exchanger tube
Upper orifice is annular recess structure, and annular recess inner wall is connected with pipe wall of heat exchange pipe, and annular recess inside wall height is lower than ring-type
The annular recess structure of groove outer wall height, water distributor and heat exchanger tube upper orifice communicates；The heat exchanger tube is spirally twisted flat-tube.
2. the good falling film evaporator of cloth film effect according to claim 1, which is characterized in that set in the heat transfer tube wall
There is wire mesh grid.
3. the good falling film evaporator of cloth film effect according to claim 2, which is characterized in that the wire mesh grid is not
Become rusty steel wire grid.
4. the good falling film evaporator of cloth film effect according to claim 2 or 3, which is characterized in that the wire mesh grid
Grid be diamond shape, rectangular or round.
5. the good falling film evaporator of cloth film effect according to claim 4, which is characterized in that the silk of the wire mesh grid
For the wave silk of 0.8 ~ 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821119259.8U CN209204693U (en) | 2018-07-16 | 2018-07-16 | A kind of falling film evaporator that cloth film effect is good |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821119259.8U CN209204693U (en) | 2018-07-16 | 2018-07-16 | A kind of falling film evaporator that cloth film effect is good |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209204693U true CN209204693U (en) | 2019-08-06 |
Family
ID=67452154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821119259.8U Active CN209204693U (en) | 2018-07-16 | 2018-07-16 | A kind of falling film evaporator that cloth film effect is good |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209204693U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115043990A (en) * | 2022-07-26 | 2022-09-13 | 上海华谊（集团）公司 | Production process of low-VOC polymer polyol |
-
2018
- 2018-07-16 CN CN201821119259.8U patent/CN209204693U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115043990A (en) * | 2022-07-26 | 2022-09-13 | 上海华谊（集团）公司 | Production process of low-VOC polymer polyol |
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