CN102179227B - Airfoil type axial-flow stirrer - Google Patents
Airfoil type axial-flow stirrer Download PDFInfo
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- CN102179227B CN102179227B CN201110090603.1A CN201110090603A CN102179227B CN 102179227 B CN102179227 B CN 102179227B CN 201110090603 A CN201110090603 A CN 201110090603A CN 102179227 B CN102179227 B CN 102179227B
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- 230000007704 transition Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 19
- 239000012530 fluid Substances 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 abstract description 4
- 239000007790 solid phase Substances 0.000 abstract description 2
- 239000007791 liquid phase Substances 0.000 abstract 1
- 241000143392 Oar Species 0.000 description 18
- 238000006396 nitration reaction Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- -1 dissolving Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006277 sulfonation reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
本发明公开了一种翼型轴流式搅拌器。它包括搅拌轴、轮毂、桨叶片，在搅拌轴上安装有轮毂，桨叶片可拆卸或不可拆卸地安装在轮毂上，搅拌器的桨叶片为光滑的空间扭曲面，在任意半径处的截面为机翼型，螺距角和叶宽自叶片端部至叶片根部连续增大，并按等螺距结构设计，在叶片上开设有与叶片的中心线相垂直的多个等腰梯形通槽，并在叶片上呈对称分布。优点：能够减少流体对搅拌桨叶面背部的冲击力，减小搅拌器的振动，加强轴向循环和流动，使反应釜内流体流动性能得到明显改善，液固相分散好，釜内物料搅拌均匀，且可以让反应生成的气体顺利的传输与逸出，保证反应的正常进行。此外，所述的翼型搅拌器的搅拌功率小于一般的翼型桨，能耗低。
The invention discloses an airfoil axial flow stirrer. It includes a stirring shaft, a hub, and paddle blades. The hub is installed on the stirring shaft, and the paddle blades are detachably or non-detachably mounted on the hub. The paddle blades of the agitator are smooth space-distorted surfaces, and the cross-section at any radius is The airfoil shape, the pitch angle and blade width increase continuously from the blade end to the blade root, and are designed according to the equal pitch structure. There are multiple isosceles trapezoidal slots perpendicular to the center line of the blade on the blade. Symmetrically distributed on the leaves. Advantages: It can reduce the impact force of the fluid on the back of the blade surface of the agitator, reduce the vibration of the agitator, strengthen the axial circulation and flow, so that the fluid flow performance in the reactor is significantly improved, the liquid and solid phases are well dispersed, and the materials in the kettle are stirred It is uniform, and can allow the gas generated by the reaction to transmit and escape smoothly, ensuring the normal progress of the reaction. In addition, the stirring power of the airfoil stirrer is smaller than that of general airfoil paddles, and the energy consumption is low.
Description
Technical field
The present invention relates to agitator, relate in particular to a kind of wing-section axial-flow type stirrer.
Background technology
Agitation mixer is widely used in the industry-by-industries such as chemical industry, light industry, pharmacy.As an important operating unit, Main Function is to material transferring energies such as liquid by agitator, allow it do radially or axial motion, make two or more liquid or solid material or carry out each processes such as sufficient mix and blend, dissolving, dispersion, reaction between the two.
At present, the blade form of the common use of agitator has: axial flow type agitating valve, the screw that comes into leaves, straight leaf vane wheel oar, plate and frame oar, three leaf palintrope oars, MIG type oar, anchor formula oar, spiral oar, single helical-ribbon type oar, two ribbon paddle and spiral-ribbon oar etc. are several.The advantages such as wherein, axial flow type stirrer is widely used in the fields such as the mixing, heat transfer, circulation, particle suspension of middle low-viscosity fluid, has low shearing, strong circulation, low energy consumption, and blade is removable are generally used under middle and slow speed of revolution.Conventional axial flow type stirrer is propeller agitator and 45 ° of oblique leaf turbines, and propeller agitator has that axial discharge capacity is large, efficiency advantages of higher, but owing to adopting die casting manufacture, cost is high, and specification is few, therefore cannot use in large-scale mixing plant.45 ° of oblique leaf turbine design are easy, low cost of manufacture, easily maximize, but because the angle of pitch of this blade is constant, thus from root of blade to blade tip different radii place pitch not etc., cause fluid axial velocity profile inhomogeneous, and speed was large in tangential minute, fluid resistance is larger, and power consumption is high, and mixed effect is undesirable.
In industrial production, common nitrated, sulfonation, oxidation, diazotising etc. are all that thermal discharge is larger, and some is also attended by the chemical reaction that a large amount of gas generates.In these reactions, in order suitably to control exothermic heat of reaction speed, guarantee that reacting balance carries out, and is typically chosen in scale semi-batch reactor and operates.At reactant, initially drip the stage, the amount of liquid in still is often less, and liquid level is lower, if now material in reactor is uniformly mixed inhomogeneously, the reaction heat of generation can not be removed in time, just there will be hot-spot, and then it is out of control to induce reaction.In addition, along with the carrying out of reaction, the gas content in reactant mixture is more and more higher, and these gases need to be removed in time, guarantees normally carrying out of reaction.Therefore, in strong exothermal reaction process, the setting height(from bottom) of actual agitator is often lower, and will guarantee passing through smoothly of gas.If adopt common axial flow type stirrer, fluid is larger to the impact at back, paddle blade face, has increased the vibration of agitator, and the blade of agitator can affect transmission and the effusion of gas.
In view of above-mentioned condition, be necessary the axial flow type stirrer structure in prior art to improve.A large amount of heat releases the feature that has gas to generate when the present invention is directed to some nitration reactions and carrying out, provide a kind of simple and reliable for structure, mixing effect good, low in energy consumption, vibrate little, the gas fast wing-section axial-flow type stirrer of overflowing, be beneficial to the carrying out of this type of reaction.
Summary of the invention
The above-mentioned deficiency that the object of the invention is to overcome existing axial flow type stirrer, provides a kind of wing-section axial-flow type stirrer.
Wing-section axial-flow type stirrer comprises shaft, wheel hub, blade sheet; Wheel hub is installed on shaft, and blade sheet detachably or is unremovably arranged on wheel hub; Described blade sheet is three, and blade is smooth spatial warping face, and blade sheet is airfoil type in the cross section of any radius; On described blade sheet, have a plurality of isosceles trapezoid grooves perpendicular with the center line of blade sheet, four limits of each isosceles trapezoid groove are parallel with root with lagging edge, guide margin, the end of blade respectively, and isosceles trapezoid groove is symmetric on blade sheet.
Described blade sheet is the angle of pitch β to arbitrary cross section, root of blade different radii place from blade tip
ipress uniform pitch structural design, angle of pitch β
ifrom blade tip to root of blade, increase continuously.The angle of pitch β of the blade tip of described blade sheet
bbe 15 °～45 °, the angle of pitch β of root of blade
abe 25 °～60 °, the angle of pitch β of blade tip
bbe less than the angle of pitch β of root of blade
a.The center line of described blade sheet arbitrary cross section is camber line, and the camber h of camber line is 0.02～0.10 with the ratio of chord length a.The wide B of leaf of described blade sheet
ifrom blade tip to root of blade, increase gradually the width B of blade tip
balways be less than the width B of root of blade
a.The blade guide margin cavetto of described blade sheet, radius r is half of vane thickness δ, blade lagging edge is also accomplished transition arc.The gross area of the isosceles trapezoid groove of opening on described blade sheet is 0.03～0.30 with the ratio of blade area.
Blade in the present invention has smooth spatial warping face, and the angle of pitch of root is greater than the angle of pitch of end.This structure makes the axial velocity of fluid even along the distribution trend of agitator radial direction, is conducive to optimize stirred tank flow field and distributes, and improves mixing efficiency; Blade is at the airfoil type section that the section of radius is process choose reasonable arbitrarily, and hydraulic performance has obtained optimization, has reduced fluid resistance; The trapezoidal groove of offering on blade sheet can reduce the impulsive force of fluid to back, paddle blade face, reduce the vibration of agitator, strengthen axial circulation and flow, make reactor inner fluid mobile performance be improved significantly, liquid-solid phase is scattered, in still, material stirring is even, and can allow the gas of reaction generation transmit smoothly and effusion, guarantees normally carrying out of reaction.In addition, the power of agitator of described aerofoil profile agitator is less than general aerofoil profile oar, and energy consumption is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of wing-section axial-flow type stirrer;
Fig. 2 is the profile of the wheel hub in wing-section axial-flow type stirrer;
Fig. 3 is the angle figure of oar root of blade and end in wing-section axial-flow type stirrer;
Fig. 4 is the structural representation of the individual blade of wing-section axial-flow type stirrer;
Fig. 5 is the A-A profile of Fig. 2;
In figure: shaft 1, wheel hub 2, blade sheet 3, blade lagging edge 4, blade guide margin 5, blade tip 6, root of blade 7, trapezoidal groove 8.
The specific embodiment
Below in conjunction with accompanying drawing, by example, the invention will be further described, but the present invention is not limited.
As shown in the figure, wing-section axial-flow type stirrer comprises shaft 1, wheel hub 2, blade sheet 3; Wheel hub 2 is installed on shaft 1, and blade sheet 3 detachably or is unremovably arranged on wheel hub 2; Described blade sheet 3 is three, and blade is smooth spatial warping face, and blade sheet 3 is airfoil type at the cross section of any radius; On described blade sheet 3, have a plurality of isosceles trapezoid grooves 8 perpendicular with the center line of blade sheet, four limits of each isosceles trapezoid groove 8 are parallel with root 7 with lagging edge 4, guide margin 5, the end 6 of blade respectively, and isosceles trapezoid groove 8 is symmetric on blade sheet.
Described blade sheet 3 is the angle of pitch β to root of blade 7 arbitrary cross sections, different radii place from blade tip 6
ipress uniform pitch structural design, angle of pitch β
ifrom blade tip 6 to root of blade 7, increase continuously.The angle of pitch β of the blade tip 6 of described blade sheet 3
bbe 15 °～45 °, the angle of pitch β of root of blade 7
abe 25 °～60 °, the angle of pitch β of blade tip 6
bbe less than the angle of pitch β of root of blade 7
a.The center line of described blade sheet 3 arbitrary cross sections is camber line, and the radius of curvature R of this section is definite by the camber h of center camber line on this cross section and the ratio of chord length a, and the camber h of camber line is 0.02～0.10 with the ratio of chord length a.The wide B of leaf of described blade sheet 3
ifrom blade tip 6, to root of blade 7, increase gradually the width B of blade tip 6
balways be less than the width B of root of blade 7
a.Blade guide margin 5 cavettos of described blade sheet 3, radius r is half of vane thickness δ, blade lagging edge 4 is also accomplished transition arc.The gross area of the isosceles trapezoid groove 8 of opening on described blade sheet 3 is 0.03～0.30 with the ratio of blade area.
Embodiment 1
Dischargeable capacity is the nitration reaction still of 50 L, and reactor internal diameter is 500 mm, and the ratio of height to diameter of kettle is 1, adopts the wing-section axial-flow type stirrer of the present invention's design to carry out nitration reaction, agitator structure referring to accompanying drawing 1 to accompanying drawing 5.
The diameter D of aerofoil profile paddle
jwith the ratio of reactor internal diameter be 0.5, the angle of pitch β of its blade tip
bbe 45 °, the angle of pitch β of root of blade
abe 60 °, blade tip is to the angle of pitch β in arbitrary cross section, root of blade different radii place
ipress uniform pitch structural design, angle of pitch β
ifrom blade tip to root of blade, increase continuously.The camber h of arbitrary cross section camber line is 0.06 with the ratio of chord length a.The leaf of blade sheet is wide to be increased gradually from blade tip to root of blade, the width B of blade tip
bbe 30 mm, the width B of root of blade
abe 55 mm.Oar vane thickness δ is 6 mm, blade guide margin cavetto, and radius r is half of vane thickness δ, blade lagging edge is also accomplished transition arc, to reduce resistance.In addition, on each blade sheet of agitator, offer 3 the isosceles trapezoid grooves perpendicular with the center line of blade, four limits of each isosceles trapezoid groove are parallel with root with lagging edge, guide margin, the end of blade respectively, isosceles trapezoid groove is symmetric on blade, isosceles trapezoid groove and end of blade spacing near blade tip are 10 mm, near the isosceles trapezoid groove of root of blade and the spacing of wheel hub cylindrical, be also 10 mm, the guide margin of isosceles trapezoid groove and oar, lagging edge spacing are 5 mm, and isosceles trapezoid groove hole is wide is 5 mm.The blade of whole aerofoil profile oar is made the blade (when paddle clockwise rotates) of the form of raising up.This aerofoil profile agitator adopts Stainless steel 316 L to manufacture.
In this 50L stirred tank, carry out nitration reaction, agitator speed is 250 rpm, and reacting balance can obtain higher single still conversion ratio and reaction efficiency.
Embodiment 2
Dischargeable capacity is the nitration reaction still of 200 L, and reactor internal diameter is 700 mm, adopts the wing-section axial-flow type stirrer of the present invention's design to carry out nitration reaction, agitator structure referring to accompanying drawing 1 to accompanying drawing 5.
The diameter D of aerofoil profile paddle
jwith the ratio of reactor internal diameter be 0.4, D
j=280 mm.The angle of pitch β of its blade tip
bbe 45 °, the angle of pitch β of root of blade
abe 60 °, blade tip is to the angle of pitch β in arbitrary cross section, root of blade different radii place
ipress uniform pitch structural design, angle of pitch β
ifrom blade tip to root of blade, increase continuously.The camber h of arbitrary cross section camber line is 0.06 with the ratio of chord length a.The leaf of blade sheet is wide to be increased gradually from blade tip to root of blade, the width B of blade tip
bbe 35 mm, the width B of root of blade
abe 65 mm.Oar vane thickness δ is 8 mm, blade guide margin cavetto, and radius r is half of vane thickness δ, blade lagging edge is also accomplished transition arc, to reduce resistance.In addition, on each blade sheet of agitator, offer 3 the isosceles trapezoid grooves perpendicular with the center line of blade, four limits of each isosceles trapezoid groove are parallel with root with lagging edge, guide margin, the end of blade respectively, isosceles trapezoid groove is symmetric on blade, isosceles trapezoid groove and end of blade spacing near blade tip are 11.5 mm, near the isosceles trapezoid groove of root of blade and the spacing of wheel hub cylindrical, be also 11.5 mm, the guide margin of isosceles trapezoid groove and oar, lagging edge spacing are 5 mm, and isosceles trapezoid groove hole is wide is 7 mm.The blade of whole aerofoil profile oar is made the blade (when paddle clockwise rotates) of the form of raising up.This aerofoil profile agitator adopts Stainless steel 316 L to manufacture.
In this 200 L stirred tank, carry out nitration reaction, agitator speed is 180 rpm, and reacting balance can obtain higher single still conversion ratio and reaction efficiency.
Dischargeable capacity is the nitration reaction still of 700 L, and reactor internal diameter is 1000 mm, adopts the wing-section axial-flow type stirrer of the present invention's design to carry out nitration reaction, agitator structure referring to accompanying drawing 1 to accompanying drawing 5.
The diameter D of aerofoil profile paddle
jwith the ratio of reactor internal diameter be 0.45, D
j=450 mm.The angle of pitch β of its blade tip
bbe 45 °, the angle of pitch β of root of blade
abe 60 °, blade tip is to the angle of pitch β in arbitrary cross section, root of blade different radii place
ipress uniform pitch structural design, angle of pitch β
ifrom blade tip to root of blade, increase continuously.The camber h of arbitrary cross section camber line is 0.06 with the ratio of chord length a.The leaf of blade sheet is wide to be increased gradually from blade tip to root of blade, the width B of blade tip
bbe 40 mm, the width B of root of blade
abe 85 mm.Oar vane thickness δ is 10 mm, blade guide margin cavetto, and radius r is half of vane thickness δ, blade lagging edge is also accomplished transition arc, to reduce resistance.In addition, on each blade sheet of agitator, offer 3 the isosceles trapezoid grooves perpendicular with the center line of blade, four limits of each isosceles trapezoid groove are parallel with root with lagging edge, guide margin, the end of blade respectively, isosceles trapezoid groove is symmetric on blade, isosceles trapezoid groove and end of blade spacing near blade tip are 22.5 mm, near the isosceles trapezoid groove of root of blade and the spacing of wheel hub cylindrical, be also 22.5 mm, the guide margin of isosceles trapezoid groove and oar, lagging edge spacing are 8 mm, and isosceles trapezoid groove hole is wide is 10 mm.The blade of whole aerofoil profile oar is made the blade (when paddle clockwise rotates) of the form of raising up.This aerofoil profile agitator adopts Stainless steel 316 L to manufacture.
In this 700 L stirred tank, carry out nitration reaction, agitator speed is 150 rpm, and reacting balance can obtain higher single still conversion ratio and reaction efficiency.
Claims (6)
1. a wing-section axial-flow type stirrer, is characterized in that comprising shaft (1), wheel hub (2), blade sheet (3); Wheel hub (2) is installed on shaft (1), and blade sheet (3) detachably or is unremovably arranged on wheel hub (2); Described blade sheet (3) is three, and blade is smooth spatial warping face, and blade sheet (3) is airfoil type in the cross section of any radius; On described blade sheet (3), have a plurality of isosceles trapezoid grooves (8) perpendicular with the center line of blade sheet, four limits of each isosceles trapezoid groove (8) are parallel with root (7) with lagging edge (4), guide margin (5), end (6) of blade respectively, isosceles trapezoid groove (8) is symmetric on blade sheet, and the gross area of isosceles trapezoid groove (8) and the ratio of blade area on described blade sheet (3), opened are 0.03～0.30.
2. a kind of wing-section axial-flow type stirrer according to claim 1, it is characterized in that described blade sheet (3) from blade tip (6) angle of pitch to arbitrary cross section, root of blade (7) different radii place
β ipress uniform pitch structural design, the angle of pitch
β ifrom blade tip (6) to root of blade (7), increase continuously.
3. a kind of wing-section axial-flow type stirrer according to claim 2, is characterized in that the angle of pitch of the blade tip (6) of described blade sheet (3)
β bbe 15 °～45 °, the angle of pitch of root of blade (7)
β abe 25 °～60 °, the angle of pitch of blade tip (6)
β bbe less than the angle of pitch of root of blade (7)
β a.
4. a kind of wing-section axial-flow type stirrer according to claim 1, is characterized in that the center line of described blade sheet (3) arbitrary cross section is camber line, the camber of camber line
hwith chord length
aratio be 0.02～0.10.
5. a kind of wing-section axial-flow type stirrer according to claim 1, is characterized in that the leaf of described blade sheet (3) is wide
b ifrom blade tip (6), to root of blade (7), increase gradually the width of blade tip (6)
b balways be less than the width of root of blade (7)
b a.
6. a kind of wing-section axial-flow type stirrer according to claim 1, is characterized in that blade guide margin (5) cavetto of described blade sheet (3), radius
rfor vane thickness
δhalf, blade lagging edge (4) is also accomplished transition arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110090603.1A CN102179227B (en) | 2011-04-12 | 2011-04-12 | Airfoil type axial-flow stirrer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110090603.1A CN102179227B (en) | 2011-04-12 | 2011-04-12 | Airfoil type axial-flow stirrer |
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| CN102179227A CN102179227A (en) | 2011-09-14 |
| CN102179227B true CN102179227B (en) | 2014-04-16 |
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| CN201110090603.1A Expired - Fee Related CN102179227B (en) | 2011-04-12 | 2011-04-12 | Airfoil type axial-flow stirrer |
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| CN105461583B (en) * | 2015-12-21 | 2017-09-05 | 常熟市柏伦精细化工有限公司 | Preparation and processing technology of a new naphthol AS‑LC |
| CN106678002B (en) * | 2016-11-28 | 2023-10-20 | 哈尔滨工大金涛科技股份有限公司 | Wind turbine blade and blade processing method |
| CN109364786A (en) * | 2018-11-19 | 2019-02-22 | 无锡市恒达水上装备有限公司 | A kind of turbine blade and manufacture of this turbine blade mould and stirring paddle |
| CN110255843B (en) * | 2019-07-19 | 2024-06-14 | 中冶赛迪装备有限公司 | Modularized aerobic fermentation aeration stirrer |
| CN114797715B (en) * | 2021-01-18 | 2024-02-02 | 万华化学(四川)有限公司 | Emulsion polymerization reaction kettle |
| CN114377569B (en) * | 2022-01-17 | 2023-10-27 | 江苏大学镇江流体工程装备技术研究院 | A bionic blade for stirring non-Newtonian fluids |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2149242Y (en) * | 1992-11-30 | 1993-12-15 | 北京化工学院 | Turbo-mixer |
| CN2460194Y (en) * | 2000-12-07 | 2001-11-21 | 上海理日科技发展有限公司 | High-efficient bowl stirring apparatus |
| CN202036961U (en) * | 2011-04-12 | 2011-11-16 | 浙江大学 | Wing-section axial-flow type stirrer |
-
2011
- 2011-04-12 CN CN201110090603.1A patent/CN102179227B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2149242Y (en) * | 1992-11-30 | 1993-12-15 | 北京化工学院 | Turbo-mixer |
| CN2460194Y (en) * | 2000-12-07 | 2001-11-21 | 上海理日科技发展有限公司 | High-efficient bowl stirring apparatus |
| CN202036961U (en) * | 2011-04-12 | 2011-11-16 | 浙江大学 | Wing-section axial-flow type stirrer |
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