CN203389349U - Dehydration falling-film evaporator - Google Patents
Dehydration falling-film evaporator Download PDFInfo
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- CN203389349U CN203389349U CN201320487924.XU CN201320487924U CN203389349U CN 203389349 U CN203389349 U CN 203389349U CN 201320487924 U CN201320487924 U CN 201320487924U CN 203389349 U CN203389349 U CN 203389349U
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- liquid distribution
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- heat exchanger
- distribution grid
- exchanger tube
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Abstract
The utility model discloses a dehydration falling-film evaporator. The dehydration falling-film evaporator comprises a shell, an upper tubular plate, a lower tubular plate and a liquid distributor, wherein a heating chamber is formed between the upper tubular plate and the lower tubular plate, multiple heat exchanging tubes are arranged in the heating chamber, a first liquid distribution plate is arranged below the liquid distributor, a second liquid distribution plate is arranged below the first liquid distribution plate, multiple first through holes are formed in the first liquid distribution plate, multiple second through holes distributed along the peripheral directions of the heat exchanging tubes are formed in parts, which correspond to the heat exchanging pipes, of the second liquid distribution plate, multiple sunken parts are arranged on the side walls, which are close to pipe orifices, of the heat exchanging tubes, and notches through which feed liquid enters the heat exchanging tubes are formed between the sunken parts and the side walls of the heat exchanging tubes arranged below the sunken parts and adjacent to the sunken parts. The dehydration falling-film evaporator has the advantages that when the feed liquid enters the heat exchanging tubes, vapor phase rises from the heat exchanging pipe orifices, liquid phase enters the heat exchanging tubes from the notches in the side walls of the heat exchanging tubes, the gas-liquid separation is realized, and the uniform film formation downward flowing in liquid-phase heat exchanging tubes is effectively ensured.
Description
Technical field
The utility model belongs to vaporizer technology field, is specifically related to a kind of dehydration falling film evaporator.
Background technology
At present, the liquid concentration evaporation operation evaporimeter for industries such as chemical industry, medicine, light industry, food, petrochemical industry, metallurgy mainly contains two classes.A kind of is film-rising evaporator, the structure of such evaporimeter mainly comprises vaporiser body and is positioned at some steam-generating banks that vaporiser body inside matches, between the steam-generating bank of vaporiser body inside, form heat tunnel, heat tunnel two ends are communicated with heat medium import and export respectively, and charging aperture is located at vaporiser body bottom.Another kind is falling film evaporator, and falling film evaporation is that feed liquid is added from falling film evaporator heating clamber upper tube box, through liquid distribution and film formation device, is evenly distributed in each heat exchanger tube, under gravity and vacuum induced and airflow function, becomes evenly membranaceous and flows from top to bottom.In flow process, by shell side heat medium heating vaporization, the separation chamber that the steam producing and liquid phase enter evaporimeter jointly, vapour-liquid is through fully separated, steam enters condenser condenses (single-action operation) or enters lower 1st effective evaporator as heat medium, thereby realize multiple-effect operation, liquid phase Ze You separation chamber discharges.
At present, the operating characteristics of falling film evaporator depends primarily on liquid distribution trough performance and pipe cap liquid inlet structure, and original structure exists following shortcoming:
(1) vapour phase rising in the downward mobile liquid phase of liquid distribution trough and heat exchanger tube could not be separated completely, and then causes liquid distribution inhomogeneous;
(2) medium inlet pressure hour, can cause tube side liquid distribution inhomogeneous;
(3) when liquid enters to manage, vapour phase rises from the heat exchange mouth of pipe, and liquid phase is also dirty from its oral area, and vapour-liquid is with mouth, and be difficult to guarantee liquid phase evenly film forming is dirty in pipe for this reason.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, and a kind of dehydration falling film evaporator is provided.When this dehydration falling film evaporator makes feed liquid enter heat exchanger tube, vapour phase rises from the heat exchange mouth of pipe, and liquid phase enters heat exchanger tube from heat exchanger tube sidewall breach, vapor-liquid separation, and evenly film forming is dirty in pipe effectively to have guaranteed liquid phase.
For achieving the above object, the technical solution adopted in the utility model is: a kind of dehydration falling film evaporator, comprise housing and be arranged on the upper perforated plate in housing, lower perforated plate and liquid distribution trough, between described upper perforated plate and lower perforated plate, form heating clamber, in described heating clamber, be provided with a plurality of heat exchanger tubes, upper perforated plate is stretched out in the upper end of described heat exchanger tube, lower perforated plate is stretched out in the lower end of described heat exchanger tube, the upper end of described housing is provided with feed liquid input pipe, the lower end of described housing is provided with feed liquid efferent duct, described liquid distribution trough is arranged on feed liquid input pipe, it is characterized in that: the below of described liquid distribution trough is provided with first liquid distribution grid, the below of described first liquid distribution grid is provided with second liquid distribution grid, on described first liquid distribution grid, offer a plurality of the first through holes, on described second liquid distribution grid and with corresponding position, heat exchanger tube position, be provided with a plurality of the second through holes of laying along heat exchanger tube circumferencial direction, described heat exchanger tube is provided with a plurality of depressed parts near the sidewall of the mouth of pipe, between the adjacent heat exchanger tube sidewall in described depressed part and its below, form the breach that enters heat exchanger tube for feed liquid.
Above-mentioned a kind of dehydration falling film evaporator, it is characterized in that: on described first liquid distribution grid, be provided with a plurality ofly for guiding the first up pressure-equalizing pipe of gas of first liquid distribution grid below, on described second liquid distribution grid, be provided with a plurality of for guiding the second up pressure-equalizing pipe of gas of second liquid distribution grid below.
Above-mentioned a kind of dehydration falling film evaporator, is characterized in that: a plurality of described the first pressure-equalizing pipes and a plurality of described the second pressure-equalizing pipe are corresponding one by one.
Above-mentioned a kind of dehydration falling film evaporator, is characterized in that: the outer rim place of described first liquid distribution grid is provided with the first downflow weir, and the outer rim place of described second liquid distribution grid is provided with the second downflow weir.
Above-mentioned a kind of dehydration falling film evaporator, is characterized in that: a plurality of described the first through holes and a plurality of described heat exchanger tube are corresponding one by one.
Above-mentioned a kind of dehydration falling film evaporator, is characterized in that: the aperture of described the first through hole is identical with the caliber of heat exchanger tube.
Above-mentioned a kind of dehydration falling film evaporator, is characterized in that: three of described the first through holes are one group and are equilateral triangle distribution.
The utility model compared with prior art has the following advantages:
1, of the present utility model simple in structure, rationally novel in design, be easy to install.
2, the utility model is separated liquid vapour phase by first liquid distribution grid and second liquid distribution grid, uninterrupted no matter, and it is uniform that liquid drops on heat exchanger tube mouth of pipe amount of liquid around.
3, the utility model is by arranging the first pressure-equalizing pipe and the second pressure-equalizing pipe, and when liquid phase is separated completely above upper perforated plate, the vapour phase of rising is even overflow from the first pressure-equalizing pipe and the second pressure-equalizing pipe, has solved the pressure problem of spraining.
4, the utility model is by arranging the first downflow weir, feed liquid has formed certain altitude liquid layer on first liquid distribution grid, under the effect of gravity, can evenly drop on second liquid distribution grid, due to the second downflow weir being set, feed liquid has formed certain altitude liquid layer on second liquid distribution grid, under the effect of gravity, can evenly drop on upper perforated plate.
5, of the present utility model to realize cost low, and result of use is good, is convenient to promote the use of.
In sum, the utility model is simple in structure, and rationally novel in design, functional reliability is high, and long service life realizes vapor-liquid separation, and evenly film forming is dirty in pipe effectively to have guaranteed liquid phase.Result of use is good, is convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is that the utility model heat exchanger tube is near the cross-sectional structure schematic diagram at mouth of pipe position.
Fig. 3 is the installation position schematic diagram of the utility model the first through hole on first liquid distribution grid.
Fig. 4 is the position relationship schematic diagram of the utility model heat exchanger tube and the second through hole.
Description of reference numerals:
1-housing; 2-feed liquid input pipe; 3-liquid distribution trough;
4-first liquid distribution grid; The 5-the first pressure-equalizing pipe; The 6-the first downflow weir;
The 7-the second pressure-equalizing pipe; The 8-the second downflow weir; 9-upper perforated plate;
10-heat exchanger tube; 10-1-depressed part; 10-2-breach;
11-heat medium delivery outlet; The 12-the second through hole; 13-feed liquid efferent duct;
14-lower perforated plate; 15-heating clamber; 16-heat medium input port;
17-second liquid distribution grid; The 18-the first through hole.
The specific embodiment
As Fig. 1, Fig. 2, a kind of dehydration falling film evaporator shown in Fig. 3 and Fig. 4, comprise housing 1 and be arranged on the upper perforated plate 9 in housing 1, lower perforated plate 14 and liquid distribution trough 3, between described upper perforated plate 9 and lower perforated plate 14, form heating clamber 15, in described heating clamber 15, be provided with a plurality of heat exchanger tubes 10, described heat exchanger tube 10 stretches out upper perforated plate 9 in upper end, described heat exchanger tube 10 stretches out lower perforated plate 14 in lower end, the upper end of described housing 1 is provided with feed liquid input pipe 2, the lower end of described housing 1 is provided with feed liquid efferent duct 13, described liquid distribution trough 3 is arranged on feed liquid input pipe 2, on described housing 1 and be positioned at heating clamber 15 top and be provided with heat medium input port 16, on described housing 1 and be positioned at heating clamber 15 bottom and be provided with heat medium delivery outlet 11, the below of described liquid distribution trough 3 is provided with first liquid distribution grid 4, the below of described first liquid distribution grid 4 is provided with second liquid distribution grid 17, on described first liquid distribution grid 4, offer a plurality of the first through holes 18, on described second liquid distribution grid 17 and with heat exchanger tube 10 corresponding positions, position, be provided with a plurality of the second through holes 12 of laying along heat exchanger tube 10 circumferencial directions, described heat exchanger tube 10 is provided with a plurality of depressed part 10-1 near the sidewall of the mouth of pipe, between adjacent heat exchanger tube 10 sidewalls in described depressed part 10-1 and its below, form the breach 10-2 that enters heat exchanger tube 10 for feed liquid.
When the present embodiment is used, feed liquid is input to liquid distribution trough 3 from feed liquid input pipe 2, feed liquid enters first liquid distribution grid 4 after liquid distribution trough 3 rough segmentations, effect due to gravity, first through hole 18 of feed liquid from first liquid distribution grid 4 fallen on second liquid distribution grid 17 uniformly, in like manner, effect due to gravity, feed liquid is evenly fallen upper perforated plate 9 from the second through hole 12 of second liquid distribution grid 17 again, finally, around being distributed to each heat exchanger tube 10 mouths of pipe around heat exchanger tube 10 peripheries " refinement ", breach 10-2 from heat exchanger tube 10 enters in heat exchanger tube 10 again, feed liquid in the interior film forming of heat exchanger tube 10 to dirty, gas rises from heat exchanger tube 10 centers, divide Cheng Liudong.Owing to separating by first liquid distribution grid 4 and 17 pairs of liquid vapour phases of second liquid distribution grid, uninterrupted no matter, it is uniform that liquid drops on heat exchanger tube 10 mouths of pipe amount of liquid around, particular design due to exchange heat pipe 10, the liquid phase making evenly flows in heat exchanger tube 10 from the side, gas phase flows in pipe, and heat exchanger tube 10 porch two flow interferences are very little, is easier to liquid phase film forming in pipe and distributes dirty.
As shown in Figure 1, on described first liquid distribution grid 4, be provided with a plurality ofly for guiding the first up pressure-equalizing pipe 5 of gas of first liquid distribution grid 4 belows, on described second liquid distribution grid 17, be provided with a plurality of for guiding the second up pressure-equalizing pipe 7 of gas of second liquid distribution grid 17 belows.In the present embodiment, preferred way is, a plurality of described the first pressure-equalizing pipes 5 and a plurality of described the second pressure-equalizing pipe 7 are corresponding one by one, and described the first pressure-equalizing pipe 5 and second pressure-equalizing pipe 7 in the vertical directions corresponding with it are coaxially laid.Liquid phase separates completely above upper perforated plate 9, and the vapour phase of rising is even overflow from the first pressure-equalizing pipe 5 and the second pressure-equalizing pipe 7, has solved the pressure problem of spraining.
As shown in Figure 1, the outer rim place of described first liquid distribution grid 4 is provided with the first downflow weir 6, and the outer rim place of described second liquid distribution grid 17 is provided with the second downflow weir 8.In the present embodiment, due to the first downflow weir 6 being set, feed liquid has formed certain altitude liquid layer on first liquid distribution grid 4, under the effect of gravity, can evenly drop on second liquid distribution grid 17, due to the second downflow weir 8 being set, feed liquid has formed certain altitude liquid layer on second liquid distribution grid 17, under the effect of gravity, can evenly drop on upper perforated plate 9.Described first liquid distribution grid 4 is by being connected with housing 1 through housing 1 the first bolt of stretching into the first downflow weir 6, and described second liquid distribution grid 17 is connected with housing 1 by the second bolt that passes housing 1 and stretch into the second downflow weir 8.
In the present embodiment, a plurality of described the first through holes 18 and a plurality of described heat exchanger tube 10 are corresponding one by one, and described the first through hole 18 and heat exchanger tube 10 in the vertical directions corresponding with it are coaxially laid.Can guarantee like this feed liquid falling from the first through hole 18, just on second liquid distribution grid 17 between a plurality of the second through holes 12, and then fall upper perforated plate 9 heat exchanger tubes 10 around from the second through hole 12.In the present embodiment, described the first through hole 18 aperture is identical with the caliber of heat exchanger tube 10.
As shown in Figure 3,18 3 of described the first through holes are one group and are equilateral triangle and distribute.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every any simple modification, change and equivalent structure transformation of above embodiment being done according to the utility model technical spirit, all still belongs in the protection domain of technical solutions of the utility model.
Claims (7)
- One kind dehydration falling film evaporator, comprise housing (1) and be arranged on the upper perforated plate (9) in housing (1), lower perforated plate (14) and liquid distribution trough (3), between described upper perforated plate (9) and lower perforated plate (14), form heating clamber (15), in described heating clamber (15), be provided with a plurality of heat exchanger tubes (10), upper perforated plate (9) is stretched out in the upper end of described heat exchanger tube (10), lower perforated plate (14) is stretched out in the lower end of described heat exchanger tube (10), the upper end of described housing (1) is provided with feed liquid input pipe (2), the lower end of described housing (1) is provided with feed liquid efferent duct (13), described liquid distribution trough (3) is arranged on feed liquid input pipe (2), it is characterized in that: the below of described liquid distribution trough (3) is provided with first liquid distribution grid (4), the below of described first liquid distribution grid (4) is provided with second liquid distribution grid (17), on described first liquid distribution grid (4), offer a plurality of the first through holes (18), described second liquid distribution grid (17) is upper and be provided with a plurality of the second through holes (12) of laying along heat exchanger tube (10) circumferencial direction with heat exchanger tube (10) corresponding position, position, described heat exchanger tube (10) is provided with a plurality of depressed parts (10-1) near the sidewall of the mouth of pipe, between adjacent heat exchanger tube (10) sidewall in described depressed part (10-1) and its below, form the breach (10-2) that enters heat exchanger tube (10) for feed liquid.
- 2. a kind of dehydration falling film evaporator according to claim 1, it is characterized in that: on described first liquid distribution grid (4), be provided with a plurality ofly for guiding up first pressure-equalizing pipe (5) of gas of first liquid distribution grid (4) below, on described second liquid distribution grid (17), be provided with a plurality of for guiding up second pressure-equalizing pipe (7) of gas of second liquid distribution grid (17) below.
- 3. a kind of dehydration falling film evaporator according to claim 2, is characterized in that: a plurality of described the first pressure-equalizing pipes (5) and a plurality of described the second pressure-equalizing pipes (7) are corresponding one by one.
- 4. a kind of dehydration falling film evaporator according to claim 1, it is characterized in that: the outer rim place of described first liquid distribution grid (4) is provided with the first downflow weir (6), the outer rim place of described second liquid distribution grid (17) is provided with the second downflow weir (8).
- 5. a kind of dehydration falling film evaporator according to claim 1, is characterized in that: a plurality of described the first through holes (18) and a plurality of described heat exchanger tube (10) are corresponding one by one.
- 6. a kind of dehydration falling film evaporator according to claim 5, is characterized in that: the aperture of described the first through hole (18) is identical with the caliber of heat exchanger tube (10).
- 7. a kind of dehydration falling film evaporator according to claim 1, is characterized in that: (18) three of described the first through holes are one group and are equilateral triangle distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320487924.XU CN203389349U (en) | 2013-08-11 | 2013-08-11 | Dehydration falling-film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320487924.XU CN203389349U (en) | 2013-08-11 | 2013-08-11 | Dehydration falling-film evaporator |
Publications (1)
| Publication Number | Publication Date |
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| CN203389349U true CN203389349U (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320487924.XU Expired - Fee Related CN203389349U (en) | 2013-08-11 | 2013-08-11 | Dehydration falling-film evaporator |
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| Country | Link |
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| CN (1) | CN203389349U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854323A (en) * | 2016-05-09 | 2016-08-17 | 覃景壮 | Falling-film evaporator balance device |
| CN106693419A (en) * | 2015-11-12 | 2017-05-24 | 中国石油化工股份有限公司 | Vertical tube falling-film evaporator |
| CN106693420A (en) * | 2015-11-12 | 2017-05-24 | 中国石油化工股份有限公司 | Falling film evaporator |
| CN107442059A (en) * | 2017-08-08 | 2017-12-08 | 浙江理工大学 | A kind of falling liquid film melt polycondensation reaction device |
| CN107726730A (en) * | 2017-10-25 | 2018-02-23 | 中石化广州工程有限公司 | A kind of vertical liquefied natural gas after-condenser |
| CN108654126A (en) * | 2018-06-26 | 2018-10-16 | 北京广厦环能科技股份有限公司 | A kind of material distributor and falling film evaporator |
| CN109876475A (en) * | 2019-03-29 | 2019-06-14 | 无锡化工装备股份有限公司 | A kind of multiple field liquid distribution device of falling-film reboiler |
| CN110025969A (en) * | 2019-03-29 | 2019-07-19 | 无锡化工装备股份有限公司 | A kind of downward film evaporator and liquid distribution method |
| CN110237554A (en) * | 2019-07-08 | 2019-09-17 | 中国科学院理化技术研究所 | A kind of falling film evaporation system and method |
| CN111530106A (en) * | 2020-06-05 | 2020-08-14 | 新疆中泰纺织集团有限公司 | Falling film evaporator capable of resisting liquid level fluctuation |
-
2013
- 2013-08-11 CN CN201320487924.XU patent/CN203389349U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693420B (en) * | 2015-11-12 | 2019-01-25 | 中国石油化工股份有限公司 | A kind of falling film evaporator |
| CN106693419A (en) * | 2015-11-12 | 2017-05-24 | 中国石油化工股份有限公司 | Vertical tube falling-film evaporator |
| CN106693420A (en) * | 2015-11-12 | 2017-05-24 | 中国石油化工股份有限公司 | Falling film evaporator |
| CN106693419B (en) * | 2015-11-12 | 2019-06-11 | 中国石油化工股份有限公司 | Vertical tube falling evaporator |
| CN105854323A (en) * | 2016-05-09 | 2016-08-17 | 覃景壮 | Falling-film evaporator balance device |
| CN107442059A (en) * | 2017-08-08 | 2017-12-08 | 浙江理工大学 | A kind of falling liquid film melt polycondensation reaction device |
| CN107726730A (en) * | 2017-10-25 | 2018-02-23 | 中石化广州工程有限公司 | A kind of vertical liquefied natural gas after-condenser |
| CN107726730B (en) * | 2017-10-25 | 2020-02-14 | 中石化广州工程有限公司 | Vertical liquefied natural gas recondenser |
| CN108654126A (en) * | 2018-06-26 | 2018-10-16 | 北京广厦环能科技股份有限公司 | A kind of material distributor and falling film evaporator |
| CN109876475A (en) * | 2019-03-29 | 2019-06-14 | 无锡化工装备股份有限公司 | A kind of multiple field liquid distribution device of falling-film reboiler |
| CN110025969A (en) * | 2019-03-29 | 2019-07-19 | 无锡化工装备股份有限公司 | A kind of downward film evaporator and liquid distribution method |
| CN110237554A (en) * | 2019-07-08 | 2019-09-17 | 中国科学院理化技术研究所 | A kind of falling film evaporation system and method |
| CN111530106A (en) * | 2020-06-05 | 2020-08-14 | 新疆中泰纺织集团有限公司 | Falling film evaporator capable of resisting liquid level fluctuation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20170811 |