CN101172216B - Self-suction gas-liquid mixing impeller - Google Patents
Self-suction gas-liquid mixing impeller Download PDFInfo
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- CN101172216B CN101172216B CN2006101341494A CN200610134149A CN101172216B CN 101172216 B CN101172216 B CN 101172216B CN 2006101341494 A CN2006101341494 A CN 2006101341494A CN 200610134149 A CN200610134149 A CN 200610134149A CN 101172216 B CN101172216 B CN 101172216B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention relates to a self-inspiring type gas-liquid mixed impeller, which is mainly composed of a connecting axle connector, a hollow disc and a guide vane, the guide vane can be arranged on the top plate and base plate of the hollow disc; wherein, the hollow disc adopts a structure with the thickness being changed from the center to the edge. The impeller of the invention can intake the gas through the negative pressure produced in the rotating process, and disperses the gas into the liquid in a way of micro bubble, the invention has the advantages of large inspiratory capacity, good gas-liquid mixing effect, low energy consumption and non impeller blockage and so on, and is widely used for the gas-liquid mixing and reacting field and the mutual separating field, and forms a variety of specialized equipment, such as waste water biochemical treatment equipment, air-flotation equipment, waste gas purification equipment, and gas-liquid contact and reaction equipment in the fields of chemical industry, pharmacy, metallurgy, food and paper manufacture and so on.
Description
Technical field
The present invention relates to a kind of gas-liquid mixed equipment, particularly a kind of self-suction gas-liquid mixing impeller.
Background technology
Self-suction gas-liquid mixing impeller is a negative pressure of utilizing impeller to produce in liquid high speed rotary course, air or other gas are caused impeller from the hollow shaft of drives impeller or the sleeve outside the axle, and the form of gas with microbubble is scattered in the liquid by impeller.It can be used for chemical reaction field between gas-liquid, improves mass-transfer efficiency, simplified apparatus structure; Can also be used for the fields that are separated such as separation of liquid liquid and liquid-solid separation,, pollutant is adhered on the microbubble, and rise to the water surface, realize that separated from contaminants and water purify purpose with microbubble as removing the pollutants such as solids, oil and fiber in the sewage.Because gas-liquid mixing impeller has functions such as bleed, gas-liquid mixed simultaneously, can the simplified apparatus structure, various auxiliary devices in the cancellation legacy equipment, economical and technically all have a remarkable advantages, can be widely used in fields such as water treatment, exhaust-gas treatment, chemical industry, metallurgy, papermaking, and form multiple special equipment, as waste water biochemical treatment equipment, air supporting machine, off-gas cleaning equipment, and the gas-liquid reaction equipment in the field such as chemical industry, pharmacy, metallurgy, food, papermaking etc.
The key of self-suction gas-liquid mixing impeller is blade wheel structure, not only should possess characteristics such as inspiratory capacity is big, gas-liquid mixed is effective, and should prevent to stop up.Disclosed impellers such as US5091083, US5242600, US3414245 comprise a plurality of hollow blades, qi-emitting hole is arranged on the rear side of blade tip, it utilizes impeller when rotation at the vacuum vortex that the blade rear side produces, and air is introduced impeller and is released in the water through qi-emitting hole; This impeller vacuum is low, inspiratory capacity is little, and does not have the suction outlet capacity, only depends on the stirring action of impeller to disperse bubble, and gas-liquid mixed and dispersion effect are poor; Qi-emitting hole on the blade easily stops up, and reason is that water pollutant easily enters the vacuum vortex, and accumulation covers on the steam vent.Disclosed impellers such as US6270061, US4297214, US2246560, US2238139 are made up of upper and lower cover plate and middle guide vane, and upper cover plate is provided with water inlet, and air intake is positioned at the impeller center; It utilizes the negative pressuren zone that the impeller center produces in the impeller suction water process to suck air, and discharges from periphery in the inner back of mixing with water of impeller; The weak point of this impeller is that the inspiratory capacity and the suction water yield exist the contradiction that can not increase simultaneously, impeller rotation or amount of air drawn can not be excessive, reason is that impeller intake and air inlet all are positioned at the impeller central area, what the impeller center sucked is air-water mixture, along with revolution increases or the air imbibed quantity increasing, air-water mixture density sharply descends, and at center generation air pocket, the vacuum of negative pressuren zone decreases even disappears, and occur fluctuating widely, the air imbibed quantity and the suction water yield also reduce thereupon and big ups and downs take place, and equipment therefore vibration also takes place and is in the irregular operation state.Disclosed impeller such as US1526596, US1374445 is made up of upper and lower cover plate and middle guide vane, and lower cover is provided with water inlet, and disclosed impellers such as its air-breathing mechanism and US6270061 are similar, and impeller rotation or amount of air drawn can not be excessive.Disclosed impellers such as US5358671, US4959183, US4551285, US4668382, US4425232, US2217231 are made up of upper cover plate and lower blade, this open type impeller also is that the negative pressuren zone that utilizes the impeller center to produce is introduced air, and all there are certain deficiency in air imbibed quantity and air water mixed effect.US1413723, US1413724, US3917763, US3650513, US3066921, US2996287, US1345596, US1726125, US5160459 etc. are disclosed to be hollow plate-like impeller, its qi-emitting hole (or air duct) is positioned on the periphery or upper and lower cover plate of hollow disc, the main faint centrifugal force of air generation itself and the shear action of impeller surface or periphery and water body of relying on introduced air, gettering ability is little, need under higher revolution, move, and there is not suction liquid ability, the gas-liquid mixed weak effect.Disclosed impellers such as US5318360, US3070229, US4193949, US382702, form by upper and lower cover plate and guide vane etc., its qi-emitting hole (or exhaust passage) is positioned on the upper cover plate and lower cover in the impeller periphery or the guide vane outside, though impeller has possessed good suction outlet capacity, but the vacuum of qi-emitting hole region is low, and the bleed effect is relatively poor.CN200410050799.1 discloses and has planted novel bleed formula impeller, on the lower cover of the upper cover plate at hollow disk top and/or bottom, guide vane is installed, qi-emitting hole is arranged on the cover plate at guide vane place, and be positioned at the rear side of guide vane direction of rotation, further can ring diversion plate be set, the supercharging blade is set in hollow disk at the guide vane other end.Big, the air water good mixing effect of the amount of air entrainment of the bleed formula impeller of this patent design, not only under slow speed, can introduce a large amount of air, and the bleed hole is not in the central area of impeller, what the impeller center sucked only is water (or liquid), the vacuum size is not limited by other factors, air introducing amount and suction liquid measure can improve and increase simultaneously with revolution, and the amount of air entrainment size adjustment is convenient, and the current shear action can also prevent that qi-emitting hole from stopping up in addition.But the structure of this self-suction gas-liquid mixing impeller still can further be improved, to improve the bleed performance.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of from the air suction type gas-liquid mixing impeller.This impeller has that inspiratory capacity is big, energy consumption is low, impeller does not have characteristics such as obstruction.
Gas-liquid mixing impeller of the present invention comprises hollow connecting shaft joint, hollow disc and guide vane, wherein hollow disc is the disc of hollow, the duct of hollow connecting shaft joint communicates with the inner space of hollow disc, guide vane is installed on the upper cover plate and/or lower cover of hollow disc, the upper and lower cover plate at guide vane place is provided with qi-emitting hole, and qi-emitting hole is positioned at the rear side of guide vane direction of rotation; Hollow disc adopts the structure that changes from the center to the edge thickness, preferred center is thick, the structure of thin edge, and preferred thickness seamlessly transits, and is taper shape etc. as upper cover plate and/or lower cover.The longitudinal profile lines of upper and lower cover plate can be straight lines, also can be curves, also can be that straight line combines with straight line, curve combines with curve or straight line combines with curve.
Guide vane can be radial blade, also can adopt BI prismatic blade or involute shape bent blades.Blade quantity can be provided with 1～50, is preferably 3～30.Qi-emitting hole is arranged in the sector region of each guide vane rear side, and preferred parallel is provided with a row or multi-row in guide vane, and a row or two rows preferably are set.When the upper and lower cover plate of hollow disc is equipped with guide vane, can be provided with the demarcation strip of center drilling in the hollow disc, demarcation strip links to each other with the barrel of hollow disc, and the inner space of hollow disc is divided into upper and lower two parts.The demarcation strip center is provided with perforate, also demarcation strip can be passed through in the lower end of air connecting shaft joint, and the air connector is all offered blow vent in the upper and lower both sides of demarcation strip.
Also can be provided with deflector on the mixing impeller of the present invention, wherein guide vane one end links to each other with the cover plate of hollow disc, and the other end links to each other with deflector, forms specific water stream channel.The shape of deflector can be consistent with the cover plate of hollow disc, and the center has circular water inlet (or inlet).The formed annular region area of the inside and outside circle of deflector can be carried out the cover guide vane at least, preferably can cover guide vane fully.Deflector can prevent that current from from guide vane upper end or the lower end is sliding leaks, improving the suction water yield and the vacuum of impeller, thereby improving amount of air entrainment and gas-liquid mixed effect; Deflector can also reduce the towing of water body to blade in addition, reduces the power consumption of impeller.
Can be provided with the supercharging blade in the hollow disc described in the present invention.The supercharging blade can be radial blade, also can adopt BI prismatic blade or involute shape bent blades, and quantity can be identical with guide vane quantity, also can be different.This supercharging blade is connected with the upper cover plate bottom surface and/or the lower cover end face of hollow disc inside, and its rotation direction is identical with the rotation direction of guide vane, and qi-emitting hole is arranged on the front side of supercharging blade.The effect of supercharging blade is as fan blade, and its front produces certain blast in the wheel rotation process, the motive force in the time of can further improving bleed, thereby the amount of air entrainment of raising impeller.
Gas-liquid mixing impeller described in the present invention can use separately, also a plurality of impellers can be installed on same hollow shaft.When on the same hollow shaft a plurality of impeller being installed, gas-liquid mixing impeller upper/lower terminal of the present invention all can be provided with hollow connecting shaft joint.
Gas-liquid mixing impeller of the present invention and hollow disc thereof can form in monoblock cast, also can be welded by corresponding parts.For example: the cylindrical shape hollow disc adopts upper cover plate, lower cover and cylinder to be welded, and upper cover plate and/or lower cover are dull and stereotyped; The hollow disc of gradient thickness can be welded by the cover plate up and down of suitable shape, can use the cylindrical shape side plate, also can not have side plate.
Self-suction gas-liquid mixing impeller of the present invention adopts the hollow disc structure of different-thickness, can effectively improve the flow regime of fluid, improves the introducing amount of gas.Hollow disc from the center to the benefit that the thickness at edge constantly changes (as constantly reducing) is: hollow disc up and down cover plate the plate face, and the deflector plate face of impeller horizontal by certain inclination angle, can increase flow channel length, improve the suction liquid measure of impeller, and guarantee gas-liquid mixture that impeller ejects liquid sucting port away from impeller, prevent that gas is back to the impeller liquid sucting port and influences the vacuum and the bleed effect of impeller.In addition, the hollow disc of this gradient thickness, the approximate edge that is positioned at impeller, the position of the qi-emitting hole about it on cover plate, negative pressure that the current modified line produces between the negative pressure that the guide vane rear side produced when impeller not only can make full use of the impeller rotation, guide vane and current are introduced air in the shear action that disc surfaces produces, and the centrifugal force that has produced when having utilized impeller to rotate at a high speed, the motive force when further having improved the impeller bleed and the amount of air entrainment of impeller.Experiment shows that under other structure and running operating mode same case, behind the hollow disc that used thickness changes, amount of air entrainment can improve about 20%.
Characteristics such as the amount of air entrainment that self-suction gas-liquid mixing impeller of the present invention has vacuum height, impeller is big, air water good mixing effect, not only under slow speed, can introduce a large amount of air, and the bleed hole is not in the central area of impeller, what the impeller center sucked only is water (or liquid), the vacuum size is not limited by other factors, air introducing amount and suction liquid measure can improve and increase simultaneously with revolution, and the amount of air entrainment size adjustment is convenient, and the current shear action can also prevent that qi-emitting hole from stopping up in addition.
Self-suction gas-liquid mixing impeller of the present invention can be used in water treatment field, as air supporting machine, biochemical aerator etc., also can use in fields such as exhaust-gas treatment, metallurgy, chemical industry, papermaking.
Description of drawings
Fig. 1 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Fig. 2 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Fig. 3 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Fig. 4 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Fig. 5 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Fig. 6 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Fig. 7 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Fig. 8 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Fig. 9 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Figure 10 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Figure 11 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Figure 12 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Figure 13 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Figure 14 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Figure 15 is a kind of front view from bleed formula gas-liquid mixing impeller of the present invention.
Figure 16 is the hollow disk lower cover of a present invention qi-emitting hole schematic diagram.
Figure 17 is the hollow disk upper cover plate of a present invention qi-emitting hole schematic diagram.
Figure 18 is supercharging blade distribution schematic diagram in the hollow disk of the present invention.
The specific embodiment
Further specify the structure of the present invention and the method for operation below in conjunction with accompanying drawing.
Shown in Fig. 1～15, the present invention (also can not be provided with cylindrical shell 3 from guided gas gas-liquid mixed blade wheel by hollow connecting shaft joint 1, upper cover plate 2, cylindrical shell 3, shown in Fig. 5,6), lower cover 5, following guide vane 6 and/or go up guide vane 8 and form, wherein upper cover plate 2, cylindrical shell 3, lower cover 5 constitute the cylindrical shape hollow disc of impellers; Following guide vane 6 and lower cover qi-emitting hole 4 are arranged on the lower cover 5, and lower cover qi-emitting hole 4 is positioned at guide vane 6 rear sides down; Last guide vane 8 and upper cover plate qi-emitting hole 9 are arranged on the upper cover plate 2, and upper cover plate qi-emitting hole 9 is positioned at upper cover plate guide vane 8 rear sides.At the rear side of each guide vane one row can be set all and be parallel to the qi-emitting hole of guide vane, but, also more qi-emitting hole can be set at the sector region of impeller rear side in order to improve the amount of air entrainment of impeller.Hollow disc adopts the structure that changes from the center to the edge thickness, preferred center is thick, the structure of thin edge, and preferred thickness seamlessly transits, and is taper shape etc. as upper cover plate and/or lower cover.The longitudinal profile lines of upper and lower cover plate can be straight line (shown in Fig. 1～15), but also can be curves, or straight line combines with straight line, curve combines with curve or straight line combines with curve.For easy to process, the longitudinal profile lines of upper and lower cover plate are preferably linear structure.
For improving amount of air entrainment and gas-liquid mixed effect, gas-liquid mixing impeller can further include down ring diversion plate 10 and (also can not establish deflector or/and go up ring diversion plate 11, as Figure 13), wherein descend ring diversion plate 10 to link to each other with following guide vane 6 on the lower cover 5; Last ring diversion plate 11 links to each other with last guide vane 8 on the upper cover plate 2.The perforate of following ring diversion plate 10 and last ring diversion plate 11 centers is the water sucking mouth (or liquid sucting port) of impeller.Following ring diversion plate 10 forms the close water stream channel (or fluid passage) of envelope with following guide vane 6, lower cover 5, last ring diversion plate 11 also forms the close water stream channel of envelope with last guide vane 8, upper cover plate 2, prevent that effectively current are from the guide vane bottom or the top is sliding leaks, improved the water velocity and the vacuum of impeller inside, also reduced water body simultaneously impeller is pulled.After increasing ring diversion plate, the vacuum of the impeller inside vacuum (about 0.1Mpa) that can reach capacity, not only amount of air entrainment obviously improves, and power consumption is very low.
Figure 16 is that the lower cover qi-emitting hole 4 on the impeller lower cover 5 reaches guide vane 6 position views down.Figure 17 is the upper cover plate qi-emitting hole 9 on the impeller upper cover plate 2 and goes up guide vane 8 position views.Qi-emitting hole all is positioned at the rear side of guide vane direction of rotation.Under the drive of drive motors and hollow shaft, impeller rotates with certain speed in liquid, and in the inner negative pressure that produces of impeller, air enters impeller by hollow connecting shaft joint 1, and is scattered in the liquid with the microbubble form by qi-emitting hole 4 on the hollow disk lower cover 5 and/or the qi-emitting hole 9 on the upper cover plate 2.
As shown in figure 18, for improving amount of air entrainment and gas-liquid mixed effect, can be provided with further in hollow disc that supercharging blade 7 supercharging blades 7 can link to each other by the end face with lower cover 4 or/link to each other with the bottom surface of upper cover plate 2 or/be fixed together with connected modes such as the inwall of cylindrical shell 3 links to each other and hollow disc, and rotate with impeller.The strict qualification do not done in the installation site of supercharging blade 7 on upper cover plate 2 and lower cover 7, can be installed between per two groups of qi-emitting holes, can be referring to the rear side that is positioned at the qi-emitting hole direction of rotation shown in Figure 180 yet.After the supercharging blade is installed, the motive force when further having improved the impeller bleed, not only amount of air entrainment increases, and the pressure of bleed can reach more than the 0.1Mpa.
Claims (13)
1. self-suction gas-liquid mixing impeller, comprise hollow connecting shaft joint, hollow disc and guide vane, wherein hollow disc is the disc of hollow, the duct of hollow connecting shaft joint communicates with the inner space of hollow disc, guide vane is installed on the upper cover plate and/or lower cover of hollow disc, the upper and lower cover plate at guide vane place is provided with qi-emitting hole, and qi-emitting hole is positioned at the rear side of guide vane direction of rotation; It is characterized in that: described hollow disc adopts the structure that changes from the center to the edge thickness.
2. according to the described impeller of claim 1, it is characterized in that: described hollow disc is that the center is thick, the structure of thin edge.
3. according to claim 1 or 2 described impellers, it is characterized in that: described hollow disc is that thickness seamlessly transits structure.
4. according to claim 1 or 2 described impellers, it is characterized in that: described upper cover plate and/or lower cover are for conical.
5. according to the impeller of stating of claim 1 or 2, it is characterized in that: the longitudinal profile lines of described upper and lower cover plate are that straight line, curve, straight line combine with straight line, curve combines with curve or straight line combines with curve.
6. according to the described impeller of claim 1, it is characterized in that: described guide vane is radial blade, BI prismatic blade or involute shape bent blades, and blade quantity is 1～50.
7. according to the described impeller of claim 1, it is characterized in that: described qi-emitting hole is arranged in the sector region of each guide vane rear side.
8. according to claim 1 or 7 described impellers, it is characterized in that: described qi-emitting hole is parallel to guide vane and is provided with a row or multi-row in the sector region of each guide vane rear side.
9. according to the described impeller of claim 1, it is characterized in that: when the upper and lower cover plate of described hollow disc is equipped with guide vane, can be provided with the demarcation strip of center drilling in the hollow disc, demarcation strip links to each other with the barrel of hollow disc, and the inner space of hollow disc is divided into upper and lower two parts.
10. according to the described impeller of claim 9, it is characterized in that: described demarcation strip center is provided with perforate; Perhaps demarcation strip is passed through in the lower end of hollow connecting shaft joint, and hollow connector is all offered blow vent in the upper and lower both sides of demarcation strip.
11. according to the described impeller of claim 1, it is characterized in that: described impeller is provided with deflector, wherein guide vane one end links to each other with the cover plate of hollow disc, the other end links to each other with deflector, form specific water stream channel, the shape of deflector can be consistent with the cover plate of hollow disc, and the center has circular inlet.
12. according to the described impeller of claim 1, it is characterized in that: be provided with the supercharging blade in the described hollow disc.
13. according to the described impeller of claim 12, it is characterized in that: described supercharging blade is radial blade, BI prismatic blade or involute shape bent blades, the supercharging blade is connected with the upper cover plate bottom surface and/or the lower cover end face of hollow disc inside, its rotation direction is identical with the rotation direction of guide vane, and qi-emitting hole is arranged on the front side of supercharging blade.
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| CN2006101341494A CN101172216B (en) | 2006-11-01 | 2006-11-01 | Self-suction gas-liquid mixing impeller |
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| CN2006101341494A CN101172216B (en) | 2006-11-01 | 2006-11-01 | Self-suction gas-liquid mixing impeller |
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| CN101172216B true CN101172216B (en) | 2011-09-21 |
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| CN102452540B (en) * | 2010-10-15 | 2014-01-01 | 中国石油化工股份有限公司 | Method for treating malodorous waste gas discharged by storage tanks |
| CN102451610B (en) * | 2010-10-15 | 2014-01-01 | 中国石油化工股份有限公司 | Treatment method for nitrogen oxide tail gas discharged from industrial production furnace, and apparatus thereof |
| CN102451625B (en) * | 2010-10-15 | 2014-01-01 | 中国石油化工股份有限公司 | Self-suction gas-liquid mixing impeller |
| CN102730855A (en) * | 2012-06-29 | 2012-10-17 | 江苏国泉泵业制造有限公司 | Diving self air feeding aeration machine runner design method |
| CN103639068A (en) * | 2013-12-21 | 2014-03-19 | 鸡西市圣达矿业技术咨询中心 | Self-rotation type air flotation column and air flotation beneficiation method |
| CN106145400B (en) * | 2015-04-21 | 2019-05-24 | 崔汇文 | Aerator |
| CN106517400A (en) * | 2015-09-09 | 2017-03-22 | 周衍涛 | Air dissolving and aeration machine |
| CN105293678B (en) * | 2015-11-30 | 2017-08-11 | 赵逸男 | A kind of anti-clogging microbubble aerator for sewage disposal |
| CN106121900B (en) * | 2016-08-19 | 2018-10-02 | 浙江景宁周氏机械有限公司 | High-efficient water wheel generator |
| CN106111040B (en) * | 2016-08-24 | 2017-12-26 | 宣城英特颜料有限公司 | A kind of self-absorbing type stirrer in reactor |
| CN108905932B (en) * | 2018-07-13 | 2020-07-17 | 黑龙江工程学院 | Experimental device suitable for gas-liquid interface reaction and using method thereof |
| CN114433365A (en) * | 2020-10-31 | 2022-05-06 | 中国石油化工股份有限公司 | Separation device and separation method for large-particle-size solids in oil sludge sand |
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| US4193949A (en) * | 1977-06-23 | 1980-03-18 | Makoto Naito | Apparatus for generating finely divided particulate bubbles |
| CN2354649Y (en) * | 1997-11-07 | 1999-12-22 | 化学工业部西南化工研究设计院 | Turbine-impeller self-sucking stirrer |
| CN1765475A (en) * | 2004-10-29 | 2006-05-03 | 中国石油化工股份有限公司 | Self air feeding type gas liquid mixing blade |
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2006
- 2006-11-01 CN CN2006101341494A patent/CN101172216B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4193949A (en) * | 1977-06-23 | 1980-03-18 | Makoto Naito | Apparatus for generating finely divided particulate bubbles |
| CN2354649Y (en) * | 1997-11-07 | 1999-12-22 | 化学工业部西南化工研究设计院 | Turbine-impeller self-sucking stirrer |
| CN1765475A (en) * | 2004-10-29 | 2006-05-03 | 中国石油化工股份有限公司 | Self air feeding type gas liquid mixing blade |
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