CN114191830A - Vertical type external falling-film evaporator - Google Patents
Vertical type external falling-film evaporator Download PDFInfo
- Publication number
- CN114191830A CN114191830A CN202111561982.8A CN202111561982A CN114191830A CN 114191830 A CN114191830 A CN 114191830A CN 202111561982 A CN202111561982 A CN 202111561982A CN 114191830 A CN114191830 A CN 114191830A
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- Prior art keywords
- tube
- falling
- film evaporator
- heat exchange
- heat transfer
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- 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.)
- Pending
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- 239000011552 falling film Substances 0.000 title claims abstract description 73
- 239000000463 material Substances 0.000 claims abstract description 50
- 238000001704 evaporation Methods 0.000 claims abstract description 29
- 230000008020 evaporation Effects 0.000 claims abstract description 28
- 239000010408 film Substances 0.000 claims abstract description 19
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 28
- 239000012530 fluid Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/06—Evaporators with vertical tubes
- B01D1/065—Evaporators with vertical tubes by film evaporating
-
- 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
Abstract
The invention provides a vertical type external falling-film evaporator which comprises an outer shell; a material inlet channel is arranged at the top of the outer shell in a penetrating way; a material outlet channel is arranged at the bottom of the outer shell; a distribution disc and a falling film evaporation unit are sequentially arranged in the outer shell along the downward direction of the material inlet channel; the falling film evaporation unit comprises a first tube plate, a second tube plate and at least 1 single-head heat exchange tube. When the vertical type external falling-film evaporator is used, materials uniformly form a film on the outer surface of the heat exchange tube, the problem that the evaporation inside the heat exchange tube is easy to scale and block is solved, meanwhile, the flow area of the materials is increased, and the pressure drop is reduced; in addition, a gas channel is arranged between the heat exchange tube bundles in the vertical type external falling-film evaporator, so that generated gas can be led out of the tube bundles, and the pressure drop of cold-side fluid is further reduced.
Description
Technical Field
The invention belongs to the technical field of evaporators, relates to a falling-film evaporator, and particularly relates to a vertical type external falling-film evaporator.
Background
The falling film evaporator is widely used for the evaporation and concentration of water or organic solvent solution in the industries of medicine, food, chemical industry, light industry and the like, and can be widely used for the waste liquid treatment in the industries. The falling-film evaporator is particularly suitable for thermosensitive materials, can be continuously operated under the vacuum low-temperature condition, has the advantages of high evaporation capacity, energy conservation, consumption reduction, low operating cost and the like, and can ensure the invariability of the materials in the evaporation process.
The prior common falling-film evaporators comprise a vertical type in-tube evaporator and a horizontal type out-of-tube evaporator, wherein the vertical type in-tube evaporator is mainly used.
CN 209790898U discloses a horizontal pipe falling film evaporator, horizontal pipe falling film evaporator includes an at least heat exchange tube, the heat exchange tube top is provided with liquid distributor and secondary steam export, liquid distributor's one end is provided with the feed inlet, horizontal heat exchange tube bottom is provided with the stock solution barrel, stock solution barrel bottom is provided with the discharge gate. The material enters the liquid distributor from the feed inlet and is evenly distributed and then sprayed onto the first layer of heat exchange tubes, a liquid film is formed on the surfaces of the heat exchange tubes and falls onto the lower layer of heat exchange tubes under the action of gravity, the material is gradually concentrated by heating and evaporating each layer of heat exchange tubes, the secondary steam obtained by evaporation is discharged from a secondary steam outlet, and the concentrated solution falls to the liquid storage barrel. The horizontal tube falling film evaporator belongs to a horizontal evaporator, the thickness of a liquid film can be increased along with the falling of materials, and the liquid film can also shrink under the action of surface tension, so that the wall of a tube wall is dry, heat transfer evaporation is deteriorated, and the heat transfer effect and the product quality are influenced.
CN 213313385U discloses a falling film evaporator, which comprises a shell, a connecting pipe arranged on the upper part of the shell, and a distributor flange arranged at the lower end of the connecting pipe, wherein a distribution disc is arranged at the lower end of the distributor flange, the distribution disc is a groove body with a bottom plate, first falling liquid holes are densely distributed on the bottom plate of the distribution disc, a falling liquid pipe plate is arranged below the distribution disc, a second falling liquid hole is arranged on the falling liquid pipe plate, a downcomer is arranged in the second falling liquid hole, a falling film pipe is arranged in the downcomer, and a bracket for fixing the falling film pipe is arranged at the pipe orifice of the falling film pipe; gaps are formed between the inner walls of the falling-film tubes at the upper parts of the falling-film tubes; the first liquid descending holes and the second liquid descending holes are arranged in a staggered mode, so that liquid flows into the falling film pipe and the downcomer from a gap, and the liquid is placed to directly flow into the downcomer.
CN213100875U discloses a falling film evaporator, which comprises a feed pipe, a feed liquid distribution assembly and an upper pipe plate; the material liquid distribution assembly comprises a spraying part and a secondary distribution disc which is arranged below the spraying part at intervals, and the pipe end distributors are arranged below the secondary distribution disc at intervals; the upper tube plate is arranged below the tube end distributor, a first opening is formed in the upper surface of the upper tube plate, a second opening is formed in the outer wall surface of the upper tube plate, and the first opening is communicated with the second opening to form a sewage draining channel.
The falling film evaporator in the vertical tube provided by the patent, fluid exchanges inner wall rotational flow at the heat exchange to form a stable liquid film, but because the number of the heat exchange tubes is limited, the flow area is small, the pressure drop loss of the falling film evaporation in the tube is too large when the negative pressure is operated, the heat transfer temperature difference is reduced, the power consumption is increased, and the use effect is influenced. If the flow area in the tube is increased, the diameter of the equipment is increased at the same time, the heat transfer effect outside the tube is reduced synchronously, and the heat transfer efficiency of the falling-film evaporator in the tube is further reduced.
In summary, designing a falling film evaporator which can increase the flow area of the material, simultaneously does not increase the diameter of the equipment, and can reduce the pressure loss of the material has become a problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a vertical type external falling-film evaporator, which is characterized in that materials uniformly form a film on the outer surface of a heat exchange tube in the using process, so that the phenomenon that the evaporation inside the heat exchange tube is easy to scale and block is solved, meanwhile, the flow area of the materials is increased, the evaporation efficiency is improved, and the pressure drop is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a vertical type external falling-film evaporator which comprises an outer shell;
a material inlet channel is arranged at the top of the outer shell in a penetrating way;
a material outlet channel is arranged at the bottom of the outer shell;
a distribution disc and a falling film evaporation unit are sequentially arranged in the outer shell along the downward direction of the material inlet channel;
the falling film evaporation unit comprises a first tube plate, a second tube plate and at least 1 single-head heat exchange tube.
According to the invention, the single-end heat exchange tube is a heat exchange tube with one closed end and the other open end, so that after material flows enter the vertical type external falling film evaporator, the material is distributed on the outer side of the single-end heat exchange tube in a film shape, and external falling film evaporation is formed.
By adopting the vertical type external falling-film evaporator, materials are sprayed onto the distribution disc from the material inlet channel, are uniformly dispersed on the distribution disc and then fall to the falling-film evaporation unit, and liquid obtained after the materials are evaporated and concentrated in the falling-film evaporation unit is discharged out of the vertical type external falling-film evaporator through the material outlet channel.
Preferably, the end of the material inlet channel is provided with a liquid distributor.
Preferably, the liquid distributor is in the shape of a shower head.
Preferably, the distribution disc is cylindrical and comprises a bottom plate and a side wall, wherein the bottom plate and the side wall are provided with the down-flow holes.
Preferably, the diameter of the downcomer holes is 3-10mm, and may be, for example, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, but is not limited to the recited values, and other values not recited in the numerical range are equally applicable.
Preferably, the number of the down-flow holes is the same as that of the single-head heat exchange tubes.
Preferably, the height of the side wall is 30-300mm, and may be, for example, 30mm, 50mm, 100mm, 150mm, 200mm, 250mm or 300mm, but is not limited to the recited values, and other values not recited within the range of values are equally applicable.
Preferably, the single-head heat exchange tube comprises a flow guide tube and a heat transfer tube.
Preferably, the heat transfer pipe includes a first heat transfer pipe or a second heat transfer pipe.
Preferably, the first heat transfer pipe is in a test tube shape and is arranged on the first tube plate in an inverted mode.
Preferably, the second heat transfer pipe is in a U-shaped pipe shape and is arranged on the first tube plate in an inverted manner.
Preferably, the guide pipe is arranged inside the heat transfer pipe.
Preferably, the outer diameter of the flow guide tube is 10-50mm, for example 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm or 50mm, but is not limited to the values listed, and other values not listed in the range of values are equally applicable.
Preferably, the heat transfer tube has an outer diameter of 25 to 57mm, for example 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm or 57mm, but is not limited to the values recited, and other values not recited within the range of values are equally applicable.
Preferably, a film distributor is arranged on the top of the first heat transfer pipe.
Preferably, the bottom of the draft tube penetrates through the first tube plate and is arranged on the second tube plate.
The film distributor can ensure that the film forming effect of the material is better, and the film forming of the material can be more stable after the material passes through the film distributor.
When the falling film evaporator is used for evaporation, the material flowing in a film forming mode is positioned on the outer side of the heat transfer pipe. The top end of the heat transfer pipe is closed, and materials fall to the outer side of the heat transfer pipe from the distribution disc.
The heating medium is conveyed to the top from the bottom of the guide pipe and then overflows into a gap between the heat transfer pipe and the guide pipe, so that heat is provided for evaporation of materials outside the heat transfer pipe.
Preferably, the single-end heat exchange tubes are equally divided into heat exchange tube bundles with centrosymmetry.
Preferably, a gas channel is arranged between the heat exchange tube bundles.
Preferably, the gas passage comprises a cross gas passage or a gas passage shaped like a Chinese character mi.
The specific gas channel is arranged between the heat exchange tube bundles, so that the generated gas can be led out of the interior of the heat exchange tube bundles, and the pressure drop of cold-side fluid is reduced.
Preferably, the inside of the outer shell is also provided with a fixing device.
Preferably, the fixing means comprises a grating and a tie rod.
Preferably, the grid is disposed between the distribution plate and the first tube sheet.
Preferably, the pull rod is fixedly arranged between the grating and the first tube plate.
Preferably, the pull rod and the single-head heat exchange tube are longitudinally arranged in parallel.
The grating and the pull rod are mutually fixed and act together to fix the single-end heat exchange tube inside the vertical type external falling film evaporator.
Preferably, the side wall of the outer shell is also provided with a tube pass outlet, a tube pass inlet and a shell pass outlet;
preferably, the tube side outlet is disposed between the first tube sheet and the second tube sheet;
preferably, the tube side inlet is disposed between the second tube sheet and the material outlet channel.
The tube pass inlet is used for conveying a heating medium for the single-end heat exchange tube, and the tube pass outlet is used for discharging the used heating medium.
The invention does not limit the outer diameter and height of the vertical external falling-film evaporator, and also does not limit the size of the guide pipe and the heat transfer pipe in the vertical falling-film evaporator, and the structure and size of the distribution disc and the film distributor.
Compared with the prior art, the invention has the following beneficial effects:
(1) when the vertical type external falling-film evaporator provided by the invention is used, materials uniformly form a film on the outer surface of the heat exchange tube, the phenomenon that the evaporation inside the heat exchange tube is easy to scale and block is solved, meanwhile, the flow area of the materials is increased, the evaporation efficiency is improved, and the pressure drop is reduced;
(2) the gas channel is arranged between the heat exchange tube bundles in the vertical type external falling-film evaporator, so that the generated gas can be led out of the tube bundles, and the pressure drop of cold-side fluid is further reduced.
Drawings
FIG. 1 is a schematic structural view of a vertical outside tube falling film evaporator provided in example 1 of the present invention;
FIG. 2 is a schematic distribution diagram of a single-end heat exchange tube in a vertical external falling-film evaporator provided in example 1 of the present invention;
wherein, 1 is the shell body, 2 is the material inlet passageway, 3 is the distribution dish, 4 is the heat-transfer pipe, 5 is the honeycomb duct, 6 is first tube sheet, 7 is the second tube sheet, 8 is the grid, 9 is the pull rod, 10 is shell side export, 11 is tube side export, 12 is tube side import, 13 is the material outlet passageway, 14 is the film distributor.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The present embodiment provides a vertical external falling-film evaporator as shown in figure 1 comprising an outer shell 1; a material inlet channel 2 is arranged at the top of the outer shell 1 in a penetrating way; a material outlet channel 13 is arranged at the bottom of the outer shell 1; a distribution disc 3 and a falling film evaporation unit are sequentially arranged in the outer shell 1 along the downward direction of the material inlet channel 2; the falling film evaporation unit comprises a first tube plate 6, a second tube plate 7 and 336 single-head heat exchange tubes.
The tail end of the material inlet pipeline 2 is provided with a shower-shaped liquid distributor.
The distribution disc 3 is cylindrical and comprises a bottom plate and a side wall, wherein the bottom plate is provided with a down-flow hole; the diameter of the down-flow hole is 5 mm; the number of the liquid descending holes is 336 consistent with that of the single-head heat exchange tubes; the height of the side wall is 200 mm.
The single-head heat exchange tube comprises a flow guide tube 5 and a heat transfer tube 4; the heat transfer pipe 4 is a first heat transfer pipe; the first heat transfer pipe is in a test tube shape and is arranged on the first tube plate 6 in an inverted manner; the top of the first heat transfer pipe is provided with a film distributor 14; the draft tube 5 penetrates through the first tube plate 6 and is arranged on the second tube plate 7.
The guide pipe 5 is arranged inside the heat transfer pipe 4; the outer diameter of the draft tube 5 is 22 mm; the outer diameter of the heat transfer pipe 4 is 32 mm; the distance between the heat transfer pipes is 3350mm, and the length of the draft tube 5 is the same as the length of the draft tube; the height of the heat transfer pipe 4 is 2500 mm.
The single-head heat exchange tubes are uniformly divided into heat exchange tube bundles which are centrosymmetric as shown in FIG. 2; a gas channel is arranged between the heat exchange tube bundles; the gas channel is a cross gas channel.
A fixing device is also arranged inside the outer shell 1; the fixing device comprises a grid 8 and a pull rod 9; the number of the grids 8 is 2; the grid 8 is arranged between the distribution disc 3 and the first tube plate 6; the pull rod 9 is fixedly arranged between the grating 8 and the first tube plate 6; the pull rod 9 and the single-end heat exchange tube are longitudinally arranged in parallel.
The side wall of the outer shell 1 is also provided with a tube pass outlet 10, a tube pass inlet 11 and a shell pass outlet 12; the tube side outlet 10 is arranged between the first tube plate 6 and the second tube plate 7; the tube side inlet 12 is arranged between the second tube sheet 7 and the material outlet channel 13.
The diameter of the vertical type external falling-film evaporator is 1100 mm; the height of the vertical type external falling-film evaporator is 4000 mm.
Example 2
This example provides a vertical, outside-tube falling-film evaporator which differs from example 1 only in that the vertical, outside-tube falling-film evaporator has a diameter of 900mm, and is otherwise the same as in example 1.
Example 3
This example provides a vertical outside-tube falling-film evaporator which differs from example 1 only in that no gas channels are provided between the heat exchange tube bundles, and is otherwise the same as example 1.
Comparative example 1
This comparative example provides a composition as in example 1 of patent document CN213100875UThe falling film evaporator. Wherein the diameter of the falling film evaporator is DN1000, and the heat exchange tube adopts
The tube length is 2500 mm.
Falling film evaporation was performed on the process material using the falling film evaporators provided in examples 1-6 and comparative example 1. The pressure drop of the cold side feed in each falling film evaporator during the falling film evaporation process is shown in table 1.
The process material is a glycollate solution, and the concentration of the glycollate is 32%.
TABLE 1
| Cold side pressure drop/Pa | |
| Example 1 | 126 |
| Example 2 | 974 |
| Example 3 | 804 |
| Comparative example 1 | 1018 |
In conclusion, in the use process of the vertical type external falling-film evaporator provided by the invention, materials uniformly form a film on the outer surface of the heat exchange tube, so that the phenomena of easy scaling and blockage in the heat exchange tube during evaporation are solved, meanwhile, the flow area of the materials is increased, and the evaporation efficiency is improved; and a gas channel is arranged between the heat exchange tube bundles in the vertical type external falling-film evaporator provided by the invention, so that the generated gas can be led out of the tube bundles, and the pressure drop of cold-side fluid is reduced.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The vertical type external falling-film evaporator is characterized by comprising an outer shell;
a material inlet channel is arranged at the top of the outer shell in a penetrating way;
a material outlet channel is arranged at the bottom of the outer shell;
a distribution disc and a falling film evaporation unit are sequentially arranged in the outer shell along the downward direction of the material inlet channel;
the falling film evaporation unit comprises a first tube plate, a second tube plate and at least 1 single-head heat exchange tube.
2. The vertical outside tube falling film evaporator of claim 1, wherein a liquid distributor is provided at a terminal end of the material inlet channel;
preferably, the liquid distributor is in the shape of a shower head.
3. The vertical external falling-film evaporator according to claim 1 or 2, wherein the distribution disc is cylindrical and comprises a bottom plate and a side wall provided with falling liquid holes;
preferably, the diameter of the down-flow hole is 3-10 mm;
preferably, the number of the down-flow holes is consistent with that of the single-head heat exchange tubes;
preferably, the height of the side wall is 30-300 mm.
4. The vertical outside tube falling film evaporator of any one of claims 1 to 3, wherein the single-ended heat exchange tube comprises a draft tube and a heat transfer tube;
preferably, the heat transfer pipe includes a first heat transfer pipe or a second heat transfer pipe;
preferably, the first heat transfer pipe is in a test tube shape and is arranged on the first tube plate in an inverted manner;
preferably, the second heat transfer pipe is in a U-shaped pipe shape and is arranged on the first pipe plate in an inverted manner;
preferably, the draft tube is arranged inside the heat transfer tube;
preferably, the outer diameter of the draft tube is 10-50 mm;
preferably, the outer diameter of the heat transfer pipe is 25-57 mm.
5. The vertical type outside-tube falling-film evaporator as claimed in claim 4, wherein a film distributor is arranged on the top of the first heat transfer tube;
preferably, the draft tube penetrates through the first tube plate and is arranged on the second tube plate.
6. The vertical outside falling film evaporator of any one of claims 1 to 5 wherein the single-ended heat exchange tubes are each a centrally symmetric heat exchange tube bundle;
preferably, a gas channel is arranged between the heat exchange tube bundles;
preferably, the gas passage comprises a cross gas passage or a gas passage shaped like a Chinese character mi.
7. The vertical outside tube falling film evaporator of any one of claims 1 to 6, wherein a fixing device is further provided inside the outer shell;
preferably, the fixing means comprises a grating and a tie rod.
8. The vertical outside tube falling film evaporator of claim 7, wherein the grid is disposed between the distribution plate and the first tube sheet;
preferably, the pull rod is fixedly arranged between the grating and the first tube plate;
preferably, the pull rod and the single-head heat exchange tube are longitudinally arranged in parallel.
9. The vertical outside falling film evaporator of any one of claims 1 to 8, wherein the outer shell is further provided with a tube side outlet, a tube side inlet and a shell side outlet on a side wall thereof.
10. The vertical outside tube falling film evaporator of claim 9, wherein the tube side outlet is disposed between a first tube sheet and a second tube sheet;
preferably, the tube side inlet is disposed between the second tube sheet and the material outlet channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561982.8A CN114191830A (en) | 2021-12-17 | 2021-12-17 | Vertical type external falling-film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561982.8A CN114191830A (en) | 2021-12-17 | 2021-12-17 | Vertical type external falling-film evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114191830A true CN114191830A (en) | 2022-03-18 |
Family
ID=80655415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111561982.8A Pending CN114191830A (en) | 2021-12-17 | 2021-12-17 | Vertical type external falling-film evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114191830A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4925526A (en) * | 1986-06-25 | 1990-05-15 | A. Ahlstrom Corporation | Tube-type evaporator |
| CN102155854A (en) * | 2011-03-15 | 2011-08-17 | 中国科学院广州能源研究所 | Vertical falling-film heat exchanger outside pipe |
| CN110721487A (en) * | 2019-09-26 | 2020-01-24 | 华东理工大学 | Pipe wall film distributor with half-open window, falling film type evaporation equipment and liquid distribution method |
| CN213313385U (en) * | 2020-08-14 | 2021-06-01 | 辽宁圣德华星化工有限公司 | Falling film evaporator |
| CN113048816A (en) * | 2021-04-28 | 2021-06-29 | 北京广厦环能科技股份有限公司 | Vertical evaporator |
-
2021
- 2021-12-17 CN CN202111561982.8A patent/CN114191830A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4925526A (en) * | 1986-06-25 | 1990-05-15 | A. Ahlstrom Corporation | Tube-type evaporator |
| CN102155854A (en) * | 2011-03-15 | 2011-08-17 | 中国科学院广州能源研究所 | Vertical falling-film heat exchanger outside pipe |
| CN110721487A (en) * | 2019-09-26 | 2020-01-24 | 华东理工大学 | Pipe wall film distributor with half-open window, falling film type evaporation equipment and liquid distribution method |
| CN213313385U (en) * | 2020-08-14 | 2021-06-01 | 辽宁圣德华星化工有限公司 | Falling film evaporator |
| CN113048816A (en) * | 2021-04-28 | 2021-06-29 | 北京广厦环能科技股份有限公司 | Vertical evaporator |
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Application publication date: 20220318 |