CN1310040A - Combined surface aeration stirring paddle - Google Patents
Combined surface aeration stirring paddle Download PDFInfo
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- CN1310040A CN1310040A CN 00102745 CN00102745A CN1310040A CN 1310040 A CN1310040 A CN 1310040A CN 00102745 CN00102745 CN 00102745 CN 00102745 A CN00102745 A CN 00102745A CN 1310040 A CN1310040 A CN 1310040A
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- surface aeration
- baffle plate
- spin
- circular baffle
- stirring paddle
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Abstract
The surface aeration paddle has one self-rotating self-floating circular baffle installed in the upper part of the stirring shaft. The baffle diameter is smaller than that of the stirring tank and greater than that of the paddle. The baffle has permeating holes, radial permeating slots or inclined fanned fins, and one central part forming one upward or downward conic cup. Limit ring and block or pin are also installed on the shaft. The present invention has low critical rotation speed of stirring to suck gas, small liquid surface fluctuation, even gas dispersion, high gas-liquid transfer effect and high stirring efficiency.
Description
The present invention relates to a class needs the mechanical stirring device of surface aeration, and particularly a kind of combined surface aeration stirring paddle is widely used in industries such as petrochemical industry, environmental project, biology and pharmacy.
Normally used surface aeration stirring paddle often adopts the Rushton oar to make surperficial aeration blade.In the surface aeration process, near the liquid level in the reactor wall and the tank diameter baffle plate raises, and the liquid level around the paddle reduces, and the Rushton blade is exposed in the gas phase easily, and the dispersion and the cycle efficieny of blade obviously reduce; And blade rotates near Free Surface, and blade top pressure is even substantially, and gas phase is not had tangible suction effect; Sucking gas moves with blade, lack that to make gas breaking be the shearing force of bubble, gas only at blade edge by turbulent flow and shearing force fragmentation, these defectives can cause the surface aeration oar of this type agitating device to suck narrow-minded, gas phase dispersion is poor, and bubble is big, and gas Liquid Mass Transfer Coefficient is little, lifting rate is little, and aeration efficient is low.
The objective of the invention is to overcome the defective of above-mentioned surface aeration oar, provide a kind of can making to stir the critical speed reduction that sucks gas, liquid fluctuating is little, and gas phase dispersion is even, and gas-liquid mass transfer is effective, the combined surface aeration stirring paddle that stirring efficiency is high.
Embodiment of the present invention are as follows:
Combined surface aeration stirring paddle provided by the invention, comprise shaft and surface aeration stirring paddle, it is characterized in that: the certainly floating circular baffle plate of spin that installation one fluctuates along shaft on the shaft above the surface aeration oar, the diameter of the certainly floating circular baffle plate of spin is less than the tank diameter internal diameter, greater than the surface aeration oar external diameter; Described spin is provided with air-vent from floating circular baffle plate, be positioned at air-vent circular or square tongue piece are installed under the side direction of surface aeration oar direction of rotation party upstream, tongue piece tilts to the downstream side of surface aeration oar direction of rotation, horizontal by 30 ° of-60 ° of inclination angles, the tongue piece area is 0.8-2 a times of air-vent area, and spin total area of breathing freely of set air-vent on floating circular baffle plate is the 15-80% of self-rotating floating baffle area; Described spin can be provided with radially ventilating groove on floating circular baffle plate, be positioned at ventilating groove the square slotted vane of inclination is installed under the side direction of surface aeration oar direction of rotation party upstream, slotted vane tilts to the downstream side of surface aeration oar direction of rotation, horizontal by 30 ° of-60 ° of inclination angles, slotted vane length is identical with ventilating groove length, highly be the slotted vane width 0.5-1.5 doubly, the total ventilative area of set ventilating groove is the 15-80% of self-rotating floating baffle area on the self-rotating floating baffle; Described spin also can be made up of the fanning strip that becomes 10 °-60 ° degree inclination angles with horizontal plane from floating circular baffle plate; Above-mentioned spin raises up from the central authorities of floating circular baffle plate, and to be inverted cone cup-shaped, or the conical cup that is recessed down, and its cone angle is 150 °-210 °; Spin fixedly mounts spacing ring, limited block or position-limitting pin on the shaft of floating circular baffle plate below.
Combined surface aeration stirring paddle provided by the invention, its operation principle is: spin shields the Rushton oar is relative with gas phase from floating circular baffle plate, can radially form pressure reduction, makes the aeration ability enhancing of Rushton oar; Under the liquid stream effect that blade produces, spin begins also to float gradually to certain altitude along the shaft rotation from floating circular baffle plate, make spin between floating circular baffle plate and Rushton oar, suitable spacing be arranged, and produce the shearing force of appropriateness, make bubble obtain effective fragmentation; Spin is bigger than Rushton oar from the diameter of floating circular baffle plate, and it is nearer apart from liquid level to the certain altitude to float, and stops liquid level lifting by a relatively large margin, prevents that the Rushton oar is exposed in the gas phase; Open the air-vent of some on the Rushton oar, or the air-vent of spin on floating circular baffle plate (also can be radially ventilating groove or form) by the fanning strip that becomes 10 ° of-60 ° of inclination angles with horizontal plane, can strengthen gas-liquid mixed and liquid phase handling capacity, improve the stirring efficiency of blade.
In a word, combined surface aeration stirring paddle provided by the invention can make and stir the critical speed reduction that sucks gas, and liquid fluctuating is little, and gas phase dispersion is even, and gas-liquid mass transfer is effective, the stirring efficiency height.
Further describe the present invention below in conjunction with drawings and Examples:
Accompanying drawing 2 is one embodiment of the invention structural representation.
Accompanying drawing 3 is another embodiment of the present invention structural representation.
Accompanying drawing 4 is further embodiment of this invention structural representation.
Wherein: surface aeration oar 1 self-rotating floating baffle 2 shafts 3
Tank diameter baffle plate 4 liquid levels 5 spacing rings 6
Limited block 61 position-limitting pins 62 air-vents 71
Ventilating groove 72 fanning strips 21
Know that by figure combined surface aeration stirring paddle provided by the invention comprises shaft 3 and surface aeration stirring paddle 1, it is characterized in that: the certainly floating circular baffle plate 2 of spin that installation one fluctuates along shaft 3 on the shaft above the surface aeration oar 13; The diameter of the certainly floating circular baffle plate 2 of spin is less than the tank diameter internal diameter, greater than surface aeration oar 1 external diameter; Described spin is provided with air-vent 71 from floating circular baffle plate 2, be positioned at air-vent 71 circular or square tongue piece 8 are installed under the side direction of surface aeration oar 1 direction of rotation party upstream, tongue piece 8 tilts to the downstream side of surface aeration oar 1 direction of rotation, horizontal by 30 ° of-60 ° of inclination angles, the tongue piece area is 0.8-2 a times of air-vent area, and spin total area of breathing freely of set air-vent 71 on floating circular baffle plate 2 is the 15-80% of self-rotating floating baffle 2 areas; Described spin also can be provided with radially ventilating groove 72 on floating circular baffle plate 2, be positioned at ventilating groove 72 the square slotted vane 81 of inclination is installed under the side direction of surface aeration oar 1 direction of rotation party upstream, slotted vane 81 tilts to the downstream side of surface aeration oar 1 direction of rotation, horizontal by 30 ° of-60 ° of inclination angles, slotted vane 81 length are identical with ventilating groove 72 length, highly be ventilating groove 72 width 0.5-1.5 doubly, the total ventilative area of set ventilating groove 72 is the 15-80% of self-rotating floating baffle 2 areas on the self-rotating floating baffle 2; Described spin also can be made up of the fanning strip 21 that becomes 10 °-60 ° degree inclination angles with horizontal plane from floating circular baffle plate 2; Above-mentioned spin raises up from the central authorities of floating circular baffle plate 2, and to be inverted cone cup-shaped, or the conical cup that is recessed down, and its cone angle is 150 °-210 °; Spin is fixed installation spacing ring 6, limited block 61 or position-limitting pin 62 on the shaft 3 between floating circular baffle plate 2 and the surface aeration oar 1.
Embodiment 1:
At the gas-liquid phase system, at internal diameter φ 154mm, high 300mm, in the cylindrical tank diameter of 4 tank diameter baffle plates 4 was arranged, medium was a water, the high 154mm of liquid level in the groove, surface aeration oar 1 adopts the Rushton oar of card perforate, diameter of propeller blade is 58mm, and submergence 40mm measures the critical speed that sucks gas with the rotating speed controller.Reactor critical speed among Fig. 1 is 342r/min, adopt combined surface aeration stirring paddle of the present invention (as Fig. 2), the spin of present embodiment has air-vent 71 on floating circular baffle plate 2, be positioned at air-vent 71 circular tongue piece 8 (tongue piece 8 also can be square) is installed under the side direction of surface aeration oar 1 direction of rotation party upstream, tongue piece 8 tilts to the downstream side of surface aeration oar 1 direction of rotation, horizontal by 30 ° of inclination angles, the area of tongue piece 8 is 0.8 times of air-vent area, when spin is 15% of the certainly floating circular baffle plate 2 of spin from the total ventilative area that floats set air-vent 71 on the circular baffle plate 2,50%, 70% or 80% o'clock, critical speed is respectively 260r/min, 256r/min, 248/min and 240r/min, its critical speed has reduced 24.0%-29.8%; When tongue piece 8 horizontal by 40 ° of inclination angles, the area of tongue piece 8 is 1.0 times of air-vent area, the total ventilative area of spin set air-vent 71 on floating circular baffle plate 2 for spin from floating circular baffle plate 2 15%, 50%, 70% or 80% o'clock, critical speed is respectively 254r/min, 248r/min, 244/min and 238r/min, and its critical speed has reduced 25.7%-30.4%; When tongue piece 8 horizontal by 50 ° of inclination angles, the area of tongue piece 8 is 1.6 times of air-vent area, the total ventilative area of spin set air-vent 71 on floating circular baffle plate 2 for spin from floating circular baffle plate 2 15%, 50%, 70% or 80% o'clock, critical speed is respectively 246r/min, 242r/min, 239/min and 234r/min, and its critical speed has reduced 28.1%-31.6%; When tongue piece 8 horizontal by 60 ° of inclination angles, the area of tongue piece 8 is 2 times of air-vent area, the total ventilative area of spin set air-vent 71 on floating circular baffle plate 2 for spin from floating circular baffle plate 2 15%, 50%, 70% or 80% o'clock, critical speed is respectively 240r/min, 234r/min, 231/min and 228r/min, and its critical speed has reduced 29.8%-33.3%.In the present embodiment, spin is fixed installation spacing ring 6 on the shaft 3 between floating circular baffle plate 2 and the surface aeration oar 1.
Embodiment 2:
At the gas-liquid phase system, in structure and size in the cylindrical tank diameter with embodiment 1, medium is a water, the high 154mm of liquid level in the groove, surface aeration oar 1 adopts the Rushton oar of card perforate, and diameter of propeller blade is 58mm, submergence 40mm, with concentration is that 15% Klorvess Liquid is made tracer, adopts conductance method to measure incorporation time.When speed of agitator is 386r/min, reactor incorporation time among Fig. 1 is 1.73s, adopt combined surface aeration stirring paddle of the present invention (as Fig. 3), the spin of present embodiment has radially ventilating groove 72 on floating circular baffle plate 2, be positioned at ventilating groove 72 the square slotted vane 81 of inclination is installed under the side direction of surface aeration oar 1 direction of rotation party upstream, slotted vane tilts to the downstream side of surface aeration oar direction of rotation, horizontal by 30 ° of inclination angles, slotted vane length is identical with ventilating groove 72 length, highly (also can be 1.5 for 0.5 of ventilating groove 72 width, 1 or 1.2) doubly, when spin is 15% of certainly floating circular baffle plate 2 areas of spin from the total ventilative area that floats set ventilating groove 72 on the circular baffle plate 2,50%, 70% or 80% o'clock, incorporation time is respectively 1.50s, 1.49s, 1.48s and 1.44s, its incorporation time has shortened 13.3%-16.8%; When slotted vane horizontal by 40 ° of inclination angles, the total ventilative area of spin set ventilating groove 72 on floating circular baffle plate 2 for spin from floating circular baffle plate 2 areas 15%, 50%, 70% or 80% o'clock, incorporation time is respectively 1.48s, 1.46s, 1.44s and 1.42s, and its incorporation time has shortened 14.4%-17.9%; When slotted vane horizontal by 50 ° of inclination angles, the total ventilative area of spin set ventilating groove 72 on floating circular baffle plate 2 for spin from floating circular baffle plate 2 areas 15%, 50%, 70% or 80% o'clock, incorporation time is respectively 1.56s, 1.52s, 1.50s and 1.48s, and its incorporation time has shortened 9.8%-14.4%; When slotted vane horizontal by 60 ° of inclination angles, the total ventilative area of spin set ventilating groove 72 on floating circular baffle plate 2 for spin from floating circular baffle plate 2 areas 15%, 50%, 70% or 80% o'clock, incorporation time is respectively 1.50s, 1.46s, 1.48s and 1.44s, and its incorporation time has shortened 13.3%-16.8%.Spin is fixed installation limited block 61 on the shaft 3 between floating circular baffle plate 2 and the surface aeration oar 1.
Embodiment 3:
At the gas-liquid liquid tri-phase system, in structure and size in the cylindrical tank diameter with embodiment 1, medium is water and kerosene, the high 154mm of liquid level in the groove, kerosene percent by volume 20%, surface aeration oar 1 adopts the Rushton oar of card perforate, diameter of propeller blade is 58mm, submergence 40mm is that 15% Klorvess Liquid is made tracer with concentration, adopts conductance method to measure the incorporation time of water.When speed of agitator is 458r/min, reactor incorporation time among Fig. 1 is 1.57s, adopt combined surface aeration stirring paddle of the present invention (as Fig. 4), the spin of present embodiment is made up of the fanning strip 21 that becomes 10 °, 20 °, 35 ° and 60 ° inclination angles with horizontal plane from floating circular baffle plate 2; Incorporation time is respectively 1.44s, 1.40s, 1.38s and 1.44s, and incorporation time has shortened 8.3%-12.1%, and spin is fixed installation position-limitting pin 63 on the shaft 3 between floating circular baffle plate 2 and the surface aeration oar 1.
Embodiment 4:
In structure and size in the cylindrical tank diameter with embodiment 1, medium is a water, the high 154mm of liquid level in the groove, surface aeration oar 1 adopts the Rushton oar of card perforate, diameter of propeller blade is 58mm, submergence 40mm with the gas Liquid Mass Transfer Coefficient of sodium sulfite oxidation process assaying reaction device, obtains power of agitator with measuring the shaft torque.When speed of agitator was 386r/min, the reactor gas Liquid Mass Transfer Coefficient among Fig. 1 was 0.0018s
-1Adopt combined surface aeration stirring paddle of the present invention, the spin of present embodiment is made up of the fanning strip 21 that becomes 40 ° of inclination angles with horizontal plane from floating circular baffle plate 2, spin raises up from the central authorities of floating circular baffle plate and is inverted cone cup-shaped (also can recessed downly be conical cup certainly), and its cone angle is 150 °, 170 °, 190 ° or 210 °; Recording gas Liquid Mass Transfer Coefficient is 0.0030s
-1, 0.0038s
-1, 0.0036s
-1And 0.0032s
-1, having increased 66%-111%, spin is fixed installation spacing ring 6 on the shaft 3 between floating circular baffle plate 2 and the surface aeration oar 1.
Claims (9)
1. combined surface aeration stirring paddle, comprise shaft and surface aeration stirring paddle, it is characterized in that: the certainly floating circular baffle plate of spin that installation one fluctuates along shaft on the shaft above the surface aeration oar, the diameter of the certainly floating circular baffle plate of spin is less than the tank diameter internal diameter, greater than the surface aeration stirring paddle external diameter.
2. by the described combined surface aeration stirring paddle of claim 1, it is characterized in that: described spin is provided with air-vent from floating circular baffle plate, be positioned at air-vent circular or square tongue piece are installed under the side direction of surface aeration oar direction of rotation party upstream, tongue piece tilts to the downstream side of surface aeration oar direction of rotation, horizontal by 30 ° of-60 ° of inclination angles, the area of tongue piece is 0.8-2 a times of air-vent area.
3. by the described combined surface aeration stirring paddle of claim 1, it is characterized in that: described spin is provided with radially ventilating groove from floating circular baffle plate, be positioned at ventilating groove square slotted vane is installed under the side direction of surface aeration oar direction of rotation party upstream, slotted vane tilts to the downstream side of surface aeration oar direction of rotation, horizontal by 30 ° of-60 ° of inclination angles, slotted vane length is identical with ventilating groove length, highly is 0.5-1.5 times of slotted vane width.
4. by the described combined surface aeration stirring paddle of claim 1, it is characterized in that: described spin is made up of the fanning strip that becomes 10 ° of-60 ° of inclination angles with horizontal plane from floating circular baffle plate.
5. by the described combined surface aeration stirring paddle of claim 2, it is characterized in that: the total ventilative area of spin set air-vent on floating circular baffle plate is the 15-80% of spin from floating circular baffle plate area.
6. by the described combined surface aeration stirring paddle of claim 3, it is characterized in that: the total ventilative area of spin set ventilating groove on floating circular baffle plate is the 15-80% of spin from floating circular baffle plate area.
7. by claim 1,2,3,4,5 or 6 described combined surface aeration stirring paddles, it is characterized in that: described spin raises up from the central authorities of floating circular baffle plate and is the cup-shaped or downward recessed conical cup that is of inverted cone, and its cone angle is 150 °-210 °.
8. by claim 1,2,3,4,5,6 or 7 described combined surface aeration stirring paddles, it is characterized in that: spin is fixed installation stop collar or limited block or position-limitting pin on the shaft between floating circular baffle plate and the surface aeration stirring paddle.
9. by the described combined surface aeration stirring paddle of claim 8, it is characterized in that: the shaft of spin between floating circular baffle plate and surface aeration stirring paddle is provided with stop collar or limited block or position-limitting pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00102745A CN1130249C (en) | 2000-02-22 | 2000-02-22 | Combined surface aeration stirring paddle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00102745A CN1130249C (en) | 2000-02-22 | 2000-02-22 | Combined surface aeration stirring paddle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1310040A true CN1310040A (en) | 2001-08-29 |
| CN1130249C CN1130249C (en) | 2003-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00102745A Expired - Fee Related CN1130249C (en) | 2000-02-22 | 2000-02-22 | Combined surface aeration stirring paddle |
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| Country | Link |
|---|---|
| CN (1) | CN1130249C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836669A (en) * | 2012-09-13 | 2012-12-26 | 宁德新能源科技有限公司 | Stirring paddle |
| CN107055768A (en) * | 2017-02-17 | 2017-08-18 | 江苏大学 | A kind of stirring-type inverted umbrella-shaped surface aerator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3861294A (en) * | 1971-09-20 | 1975-01-21 | Kenneth M Coldren | Method and apparatus for treating whole feed grain |
| SU1637859A1 (en) * | 1988-11-21 | 1991-03-30 | Ленинградский горный институт им.Г.В.Плеханова | Apparatus for increasing interface between solid and liquid phases |
| US5964527A (en) * | 1997-03-19 | 1999-10-12 | Decnop; Coen Hendrik | Mixing device |
| CN2341704Y (en) * | 1998-09-22 | 1999-10-06 | 四川联合大学 | High efficiency energy saving jet stirrer |
-
2000
- 2000-02-22 CN CN00102745A patent/CN1130249C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836669A (en) * | 2012-09-13 | 2012-12-26 | 宁德新能源科技有限公司 | Stirring paddle |
| CN107055768A (en) * | 2017-02-17 | 2017-08-18 | 江苏大学 | A kind of stirring-type inverted umbrella-shaped surface aerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1130249C (en) | 2003-12-10 |
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