CN202715271U - Sieve plate extracting tower - Google Patents
Sieve plate extracting tower Download PDFInfo
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- CN202715271U CN202715271U CN 201120535213 CN201120535213U CN202715271U CN 202715271 U CN202715271 U CN 202715271U CN 201120535213 CN201120535213 CN 201120535213 CN 201120535213 U CN201120535213 U CN 201120535213U CN 202715271 U CN202715271 U CN 202715271U
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Abstract
The utility model relates to a sieve plate extracting tower. Diversion baffle plates are arranged at the outlets of tower plates, and are arranged in parallel to down spouts; the installation inclination angles of the down spouts are determined according to the width of a continuous phase inlet and the distances among the tower plates, i.e., the width of the continuous phase inlet of the tower, the distance among the tower plates and the wall length of each down spout construct a right-angled triangle; the down spouts and the diversion baffle plates are provided with grooves; small transverse baffle plates are arranged in a plurality of grooves in the upper parts of the down spouts; the quantity of the installed small transverse baffle plates is one third to a half of the quantity of the grooves on the down spouts; and the widths of the small transverse baffle plates are 2-3 times the wall thicknesses of the down spouts. According to the extracting tower disclosed by the utility model, a continuous phase liquid can flow through the inside of the entire tower uniformly, reflux regions among the tower plates disappear basically, flow field distribution is uniform, a flowing structure is approximate to an ideal plunger flow model, the effective utilization ratio of the space in the tower is increased remarkably, and two-phase mass transfer efficiency is increased finally.
Description
Technical field
The utility model belongs to the extraction equipment technical field, relates to a kind of perforated-plate extraction tower of new structure, particularly the Novel tower such as downspout, flow apron inner parts structure.
Background technology
Tradition perforated-plate extraction tower (1) internal structure as shown in Figure 1, continuous phase liquid enters from cat head entrance (3), the downspout (4) of flowing through and vertically installing is horizontally through every one deck column plate (5) spacing, flows out from tower bottom outlet (6) at last.Decentralized photo liquid enters at the bottom of tower, is upward through every one deck column plate with the drop form, flows out from cat head at last, and two-phase liquid carries out interphase mass transfer in the counter current contacting process, thereby reaches the purpose that liquid-liquid extraction separates.There is the very large recirculating zone of area in continuous phase liquid in the tower between two-layer column plate, space in the serious waste tower; The ceaselessly vorticla motion of most continuous phase liquid, the dispersed phase drop of carrying rising secretly refluxes together and causes axial backmixing, so that phase border contact surface can not be upgraded in time, has increased resistance to mass tranfer; Simultaneously continuous phase flow velocity on column plate is excessive, has shortened two-phase time of contact, and two alternately can not carry out abundant mass transfer, have reduced the mass-transfer efficiency of tower.
Structures shape efficient, the equipment such as the various conveyings in the chemical process, separation, reaction, its internal structure can directly affect the efficient that flows, transmits or react of fluid, so we wish to improve by the optimized device structure efficient of technical process.For tower, optimizing downcomer structure is a kind of very effective means with the mass-transfer efficiency that improves tower.In the last few years, existing much about improve the research of tower inner transmission matter efficient by changing downcomer structure, quantity and arrangement mode thereof etc.Downspout develops into semi-circular downspout, radially downspout, inclination downspout, crescent downspout etc. from traditional arc and circular configuration; Quantity also develops into two downspouts and multiple-downcomer form by single downspout, and tower plate structure also has cross flow tray, double overflow column plate and multi-overflow column plate.In the industry successful Application pass through optimize downcomer structure to improve the case of tower inner transmission matter efficient too numerous to enumerate, such as NYE column plate, MD column plate, DJ column plate, Vortex column plate etc.Yet changing form of these downspouts is to be applied in the rectifying device mostly at present, for extraction tower, even report seldom with the research that improves fluidal texture in the tower, raising extraction process mass-transfer efficiency by changing downcomer structure.
Summary of the invention
A kind of perforated-plate extraction tower of the present utility model, it is inhomogeneous that purpose is to overcome the interior liquid flow of existing perforated-plate extraction tower, there is the very large recirculating zone of area between column plate, the space effective rate of utilization is low in the tower, there is not the recirculating zone in the shortcomings such as the two-phase mass-transfer efficiency is low substantially by improving downcomer structure, flow apron etc. is installed, designing between a kind of column plate, fluidal texture is reasonable, the Novel sieve plate extraction tower that mass-transfer efficiency is high.
The utility model is achieved through the following technical solutions:
Novel sieve plate extraction tower of the present utility model (2) as shown in Figure 2, downspout (4) tilts to install at a certain angle, the downspout mounted angle is determined by continuous phase throat width and tray spacing, be that the continuous phase entrance is wide, tray spacing and downcomer wall are long consists of a right angled triangle, as shown in Figure 2; Flow apron (7), flow apron installation parallel with downspout are installed in column plate (5) exit; Downspout and flow apron fluting (8).Horizontal small front apron (9) is installed respectively at some flutings place, the top of downspout, and the number of the horizontal small front apron of installing is 1/3rd to 1/2nd of the number of slotting on the downspout, and horizontal small front apron width is 2～3 times of downspout wall thickness.
Novel sieve plate extraction tower of the present utility model, verify through the CFD simulation and experiment, the continuous phase fluidal texture is reasonable in the tower, the recirculating zone disappears substantially between column plate, the space effective rate of utilization improves greatly in the tower, can increase like this phase border contact area and increase simultaneously two-phase time of contact, mass transport process is strengthened, finally improve the two-phase mass-transfer efficiency.Compare with conventional tower, after downspout tilted installation, tray outlet place interpolation flow apron, downspout and flow apron fluting in the Novel tower, the flow field in tower recirculation area can reduce a lot, and it is more even that velocity flow profile becomes; Further, adjust number and the size of slotting on downspout and the flow apron, it is more even that flow field in tower becomes, and large recirculating zone almost is eliminated, and just there are some stagnant areas in edge; And at the some flutings in downspout top place respectively level horizontal small front apron has been installed, laterally the effect of small front apron is to reduce the large velocity component downwards that liquid forms owing to Action of Gravity Field, the lower zone between two boards that limited liquid owing to hurriedly moving downward forms the recirculating zone or forms the trend of large tracts of land stagnant area at the upper area of two blocks of column plates, make the VELOCITY DISTRIBUTION of continuous phase between column plate more even generally, recirculating zone and stagnant area area are less.In the Novel sieve plate extraction tower, except there is the stagnant area of fritter in the column plate edge, the overwhelming majority has not had the recirculating zone in the zone, greatly reduced the axial backmixing phenomenon, whole flow field in tower is very close to desirable plug flow model, this will reduce resistance to mass tranfer so that phase border contact surface is fully upgraded, and improve the mass-transfer efficiency of tower.
The interior downcomer structure of extraction tower that is characterised in that of the present utility model is improved, flow apron is installed at the tray outlet place, be specially the vertical downspout in the traditional extraction tower is changed at a certain angle tilting to install, the downspout mounted angle determined by continuous phase throat width and tray spacing, and namely wide, the tray spacing of continuous phase entrance and downcomer wall are long consists of a right angled triangle; Flow apron, flow apron installation parallel with downspout are installed by the tray outlet place; Downspout and flow apron fluting, the number of slotting and size according to the overall dimensions of tower with separate task and determine; Horizontal small front apron is installed at some flutings place, downspout top, the number of the horizontal small front apron of installing is 1/3rd to 1/2nd of the number of slotting on the downspout, laterally the small front apron width is 2～3 times of downspout wall thickness, the number of the horizontal small front apron of installing and size according to the overall dimensions of tower with to separate task definite.The concrete size of each tower internals changes with the overall dimensions correspondence of separation task and extraction tower, should be determined by the measurement of CFD simulation and experiment.The number of slotting and size and horizontal small front apron width can according to the overall dimensions of tower with separate task and determine.The concrete size of each tower internals changes with the overall dimensions correspondence of separation task and extraction tower, should be determined by the measurement of CFD simulation and experiment.The Novel extraction column inner parts structure detailed dimensions that this application provides calculated by the fluent software simulation and the PIV experimental verification after obtain good effect.
Effect of the present utility model and advantage be, continuous phase liquid can be flowed through in the whole tower uniformly, and the recirculating zone disappears substantially between column plate, Flow Field Distribution is even, fluidal texture is near desirable plug flow model, and the space effective rate of utilization significantly improves in the tower, has finally improved the two-phase mass-transfer efficiency.
Description of drawings
Fig. 1 is traditional perforated-plate extraction tower internal structure schematic diagram;
Fig. 2 is Novel sieve plate extraction tower internal structure schematic diagram;
Fig. 3 is Novel sieve plate extraction tower three-dimensional structure schematic diagram;
Among the figure, 1-tradition perforated-plate extraction tower, 2-Novel sieve plate extraction tower, 3-continuous phase entrance, 4-downspout, 5-column plate, the outlet of 6-continuous phase, 7-flow apron, 8-groove, the horizontal small front apron of 9-.
The specific embodiment
The utility model is described in further detail with reference to the accompanying drawings for the below:
Tradition perforated-plate extraction tower (1) internal structure as shown in Figure 1, continuous phase liquid enters from cat head continuous phase entrance (3), the downspout (4) of flowing through and vertically installing, be horizontally through every one deck column plate (5) spacing, flow out (6) by continuous phase outlet at the bottom of the tower at last, decentralized photo liquid enters at the bottom of tower, be upward through every one deck column plate with the drop form, flow out from cat head at last, two-phase liquid carries out interphase mass transfer in the counter current contacting process, thereby reaches the purpose that liquid-liquid extraction separates.
Novel sieve plate extraction tower (2) internal structure as shown in Figure 2, downspout (4) tilt to be installed at a certain angle; Flow apron (7), flow apron installation parallel with downspout are installed in column plate (5) exit; Open some grooves (8) on downspout and the flow apron; Horizontal small front apron (9) is installed at several flutings place, downspout top, the number of the horizontal small front apron of installing is 1/3rd to 1/2nd of the number of slotting on the downspout, laterally the small front apron width is 2～3 times of downspout wall thickness, its concrete number and size according to the overall dimensions of tower with separate task and determine.
Specific embodiment: under identical separation task and identical tower body size, contrast flow structure and mass transfer separating effect in traditional perforated-plate extraction tower (1) and the Novel sieve plate extraction tower (2).Two Sopwith staffs are very little as shown in table 1.
Table 1 liang Sopwith staff is very little
The overall dimensions of Novel sieve plate extraction tower is identical with conventional tower, and just the structure of downspout and flow apron changes, and its concrete structure and size are as shown in table 2.
Table 2 Novel sieve plate extraction tower feature structure
System is 30%TBP (kerosene is solvent)-acetic acid-water system, utilizes the acetic acid in the kerosene extraction water.Wherein, water is continuous phase, and oil phase is decentralized photo.Continuous phase entrance flow velocity is 0.01m/s, and continuous phase entrance acetate concentration is 0.1mol/l.
Through CFD simulation and PIV measuring, simulation and experiment is the result unanimously show, has the very large recirculating zone of area between column plate in the conventional tower, and two-phase time of contact has been shortened in the interior space of serious waste tower, and the continuous phase flow velocity is very large on the column plate.Fluidal texture is reasonable in the Novel tower, VELOCITY DISTRIBUTION is even, except there is the stagnant area of fritter in the column plate edge, the overwhelming majority has not had the recirculating zone in the zone, greatly reduced the axial backmixing phenomenon, whole flow field in tower is very close to desirable plug flow model, and this incites somebody to action so that phase border contact surface is fully upgraded, reduce resistance to mass tranfer, improve the two-phase mass-transfer efficiency.Quantitative comparison two reflux in tower district areas account for the long-pending ratio in distance between plates longitudinal cross-section, and the result is as shown in table 3.
Table 3 liang tower recirculation area proportion relatively
Equally, there are the very large concentration recirculating zone of area and mass transfer dead band in the conventional tower, waste space in the tower, reduced the mass-transfer efficiency of tower.In the Novel tower, except there is among a small circle the mass transfer dead band in the column plate edge, two contact well in most of zone in the tower, alternate contact surface can fully be upgraded; Axial backmixing is effectively suppressed, and there is no the mass transfer recirculating zone; Two-phase is relatively long time of contact, can carry out more sufficient mass transfer, has strengthened the interphase mass transfer effect.Quantitative comparison two tower mass transfer effects, as shown in table 4.
Table 4 liang tower mass transfer effect relatively
The concrete size of above embodiment only is to be optimized gained under this separation task and tower body size, and protection domain of the present utility model is not limited to this.Being equal to that those skilled in the art do on the utility model basis substitutes and conversion, all within protection domain of the present utility model.
Claims (4)
1. perforated-plate extraction tower, downspout tilts to install; Flow apron, flow apron installation parallel with downspout are installed at the tray outlet place.
2. perforated-plate extraction tower according to claim 1 is characterized in that the downspout mounted angle is determined by continuous phase throat width and tray spacing, and namely wide, the tray spacing of tower continuous phase entrance and downcomer wall are long consists of a right angled triangle.
3. perforated-plate extraction tower according to claim 1 and 2 is characterized in that downspout and flow apron fluting.
4. perforated-plate extraction tower according to claim 3, it is characterized in that some flutings place, downspout top installs horizontal small front apron, the number of the horizontal small front apron of installing is 1/3rd to 1/2nd of downspout fluting number, and horizontal small front apron width is 2～3 times of downspout wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120535213 CN202715271U (en) | 2011-12-19 | 2011-12-19 | Sieve plate extracting tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120535213 CN202715271U (en) | 2011-12-19 | 2011-12-19 | Sieve plate extracting tower |
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| Publication Number | Publication Date |
|---|---|
| CN202715271U true CN202715271U (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120535213 Expired - Fee Related CN202715271U (en) | 2011-12-19 | 2011-12-19 | Sieve plate extracting tower |
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| CN (1) | CN202715271U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102631794A (en) * | 2011-12-19 | 2012-08-15 | 天津大学 | Perforated-plate extraction tower |
| CN112169363A (en) * | 2020-09-29 | 2021-01-05 | 中轻化工绍兴有限公司 | High-efficiency continuous vacuum stripping dioxane removing system |
-
2011
- 2011-12-19 CN CN 201120535213 patent/CN202715271U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102631794A (en) * | 2011-12-19 | 2012-08-15 | 天津大学 | Perforated-plate extraction tower |
| CN112169363A (en) * | 2020-09-29 | 2021-01-05 | 中轻化工绍兴有限公司 | High-efficiency continuous vacuum stripping dioxane removing system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20131219 |