CN205886887U - Agitating unit and reactor that contains agitating unit - Google Patents

Abstract

The utility model discloses an agitating unit and reactor that contains agitating unit belongs to fluid mixing technical field. The utility model discloses an agitating unit's blade comprises the concave surface of radial extension and high shrink, and the summit of concave surface is located concave surface and disc plane intersection department to disperse perpendicularly along the tangential. The curved the first half of concave surface inner edge is asymmetric with the latter half, and the first half is extended length and is greater than the latter half, and the curved upper and lower parts of concave surface outer fringe is the symmetry, and the vertical height of concave surface inner edge is greater than the vertical height of outer fringe, but the tangential extension elongation of concave surface outer fringe is more than the tangential extension elongation of inner edge. The blade inboard is favorable to the bubble that catch to rise and makes it the dispersion to the liquid phase in, and the blade extends the in -process to the outside, and its vertical height shrinks gradually. The utility model discloses a can does agitating unit have lower power consumption, higher gas -liquid dispersion efficiency and combination ability, be energy -efficiently with gas dispersion in liquid phase system or liquid in the solid system.

Description

A kind of agitating device and the reactor containing agitating device

Technical field

This utility model is related to a kind of agitating device and the reactor containing agitating device, belongs to fluid mixing techniques neck Domain.

Background technology

During Gas-Liquid Dispersion is widely used in ventilating fermentation, bio-aeration, the gentle liquid-solid reaction of gas liquid reaction etc..Engineering Always desired design goes out one kind gas can be well-dispersed in liquid teachers, can save the agitator device of power consumption again, and This idea is achieved with the design of rushton.

The 1950's, along with the large-scale production of penicillin, the straight leaf disc being designed by American rushton Vane wheel oar (also known as rushton agitator) obtains extensively to be applied.Disk is connected with shaft by this agitator by a wheel hub, Disk perimeter several pieces plane blades vertical with disk uniform.The feature of this agitator is that shear action is strong, Gas-Liquid Dispersion effect Good.

Rushton agitator is very popular because its making is simple, dispersion effect is good.With 20 century 70 smith With after van ' t proposes " cavitation theory " and designs semi-circle tubular blade, radial flow turbine stirrer is just recessed towards more get deeply stuck in Face developer blade.Cd-6 type oar (as shown in Figure 7) having chemineer company of the U.S. meanwhile.

To 1998, bakker etc. have devised the linear oar of Unsymmetrical Parabolic (abbreviation bt-6, as shown in Figure 8) and applies for Patent.Radius of curvature near summit for the adopted parabola of this blade is less, so that " air pocket " of blade behind is substantially reduced, with When its up and down asymmetric structure be more favorable to capture bubble, make the general phenomenon of gas be less prone to occur, thus greatly strengthen Gas-Liquid Dispersion performance, and be industrially widely used.

Although bt-6 oar makes great progress compared with rushton agitator, its overall mixed performance and dispersion efficiency are still It is not up to the requirement of people, be necessary for this to design a kind of power consumption agitator lower, in hgher efficiency.

Utility model content

In order to solve the above problems, this utility model develops a kind of efficient, Gas-Liquid Dispersion agitating device of low energy consumption, Including agitator (disk, wheel hub, blade), shaft and power set, described agitator has relatively low power levels number, relatively Good mixed performance and hold gas mass-transfer performance, is applied in Gas-Liquid Dispersion system or gas-liquid-solid dispersion.Inventor passes through real Issue after examination and approval existing, maintain the axial cross section of concave-blade to amass and constant its lifting rate can be maintained to be basically unchanged.On this basis, this practicality New blade is compressed its axial height during radially inner side gradually stretches toward outside, its power consumption can be made substantially to subtract Little, thus substantially increasing its discharge opeing efficiency and Gas-Liquid Dispersion efficiency.

Agitating device of the present utility model can be applicable to Gas-Liquid Dispersion and mixed process in reactor, and this device comprises to stir The blade that axle, disk, wheel hub and several radial compression stretch.It has the characteristics that dispersion efficiency height, energy consumption are low, and blade is behind Air pocket less, gas dispersion is more abundant, and spotting out is also higher than the agitator of current commercial Application.

Described agitating device employs asymmetric spill stirring vane up and down.It is mainly characterized by, part on blade Projected area in the horizontal plane is partly bigger than lower, and that is, the upper part of blade is tangentially more wider than lower part, thus producing one Block ledge, is conducive to capturing the bubble rising；From conventional paddle stirrer all unlike, on hatching inside blade radial Part is partly wide more than lower, and radial outside top and the stand out of bottom are gradually reduced, finally equal.Very important one Point is that, during this change, the open height of blade axial section is met liquid level and is gradually reduced, and the area of section Constant, thus ensure that the discharge capacity of agitator does not occur significant change.

Because relatively low for the requirement of capture bubble outside blade radial, but moment is larger, leads to its power consumption larger.So Traditional contour extension of radial direction is become the extension being gradually reduced for height by this utility model, but maintains blade axial section face Long-pending is constant, thus reducing power consumption in the case of not affecting its discharge capacity.Do not affect discharge capacity thus ensure that it holds gas, dispersion With mixing effect, thus increased the stirring efficiency of unit work consumptiom.

Obtained by optimizing, this agitator includes the disk of a level and multiple footpaths has been mounted equidistant around circumference Blade to compressing and stretching.Each blade includes asymmetric upper and lower two parts, and the plane that this two parts is located in disk connects Connect.Blade is met with the liquid level axial direction contour line that obtains of cutting is parabola, and two-part parabola can be same parabolic up and down That line equation determines or being determined by different parabolic equations.In the blade top and the bottom width near stirring shaft portion Degree difference is maximum, meets liquid level axial height highest；During away from shaft circumferentially extending, meet liquid level and be gradually reduced, The tangential width of top and the bottom increases simultaneously simultaneously, partly fast on the Amplitude Ratio that lower part increases, and is finally reached top and the bottom Width is equal, constitutes and meets liquid level height, top and the bottom stand out greatly near stirring shaft portion, meets liquid away from stirring shaft portion The blade shape that face is highly low, top and the bottom stand out is little.

In addition, being obtained by optimization, in the contour line of the axial section of the arbitrary radial position of blade, bottom certain point arrives The distance of disc centre place plane is equal with the distance of bottom corresponding point to disc centre place plane, thus ensure that blade The unification stretched up and down, so that the flow field in whipping process is relatively stable.

Agitating device of the present utility model, including agitator, shaft；Wherein agitator includes disk, wheel hub, Duo Gexiang Blade for shaft circumferentially extending；The liquid level axial direction contour line that obtains of cutting of meeting of described blade is referred to as hatching, section Line is divided into upper and lower two parts with disk place horizontal plane for boundary；Tangential width in the blade radial upper part of the hatching of inner side Degree is bigger than the tangential width of lower part, in radially extending process, the tangential width of hatching upper and lower part increase simultaneously and under Portion is bigger than the amplitude that top increases, and axial height is gradually reduced, and the area of section keeps constant simultaneously, and blade radial is outermost to be cutd open The tangential width of the upper and lower part of upper thread is equal and axial height is less than inner side.

In one embodiment, the axial section of described blade is v font, and the interior line of v font is referred to as section Line, its shape can be parabola, hyperbola, oval camber line and circular arc line etc., is preferred with parabola.

The blade of described circumferentially extending is arranged on disk, and the trailing edge of blade is fixed on disk.

In this utility model, it is referred to as the radially inner side of blade near the region of shaft, the region away from shaft is referred to as Outside blade radial.Tangential width, refer to disk projection in the horizontal plane length.

In this utility model, the area of section refers to what straight line that two end points of hatching connect into and hatching were surrounded The area of plane domain.

In one embodiment, the shape facility of described blade is that radially inner side top tangentially projects, but radially Outside is then to flush, and radially inner side meets liquid level greatly, and it is little that radial outside meets liquid level.

In one embodiment, in radially extending process, the area of its axial section remains unchanged described blade.

In one embodiment, the upper part of blade axial direction hatching and bottom split-phase meet on horizontal plane a bit, on Part and bottom are divided into certain angle.Blade axial direction hatching on part and bottom divide between angle extending radially outward During be gradually reduced.

In one embodiment, the hatching of the axial section of described blade is all divided into upper and lower two parts, in different footpaths It is all different to the hatching at position；The blade radial lower tangential width of hatching of inner side and upper tangential width Ratio be 0.5～0.85；The top of the outermost hatching of blade radial is equal with lower tangential width.

In one embodiment, the axial height of the outermost hatching of described blade radial and blade radial inner side The axial height of hatching ratio be 0.4～0.9.

In one embodiment, blade has certain thickness, and its shape is according to depending on meeting liquid surface shape, being by meeting liquid level Increase what certain thickness obtained backward.

In one embodiment, the quantity of described blade is 4～10, is distributed in disk perimeter.

In one embodiment, the diameter of described disk and the diameter of agitator be than for 0.5～0.8, agitator straight Footpath refers to two apart from the distance between farthest tail point.

In one embodiment, the ratio of the blade radial height of hatching and the stirrer diameter of inner side be 0.1～ 0.35；The diameter of agitator refers to two apart from the distance between farthest tail point.

In one embodiment, blade radial length and the ratio of stirrer diameter are 0.15～0.4.

In one embodiment, the bottom of described hatching a little arrive disk place horizontal plane apart from d ' and top pair The all equal apart from d of disk place horizontal plane should be put.

In one embodiment, described agitating device also includes power set.

In one embodiment, the shaft of described agitating device is used for connecting agitator arm (fixation is vaned Disk) and power set, drive agitator arm to rotate to capture the bubble of rising and to be disperseed.Agitator arm is added by wheel hub Gu and the connection of shaft.

In one embodiment, described agitator arm can be all-in-one-piece, can be split easy-dismount.

In one embodiment, described agitating device general with stainless steel making it is also possible to carbon steel, highstrenghtpiston etc. Other materials manufactures.

In one embodiment, described agitator dress may be mounted on the central axis in reactor it is also possible to eccentric Install.

In one embodiment, need below described agitator gas distributor, the ventilation side of gas distributor are installed To can be can also to be downward upwards.

This utility model also provides a kind of reactor, and this reactor contains described agitating device.

In one embodiment, a shaft can connect one or more described agitator.

In one embodiment, described agitator is arranged on inside reactor, can be used alone, and also can stir with other Mix device to be used in combination.

In one embodiment, need below described agitator gas distributor is installed.

In one embodiment, the ventilation direction of described gas distributor can be can also to be downward upwards.

The beneficial effects of the utility model:

(1) by circumferentially extending and the concave surface of high shrinkage forms, in concave surface the blade of agitating device of the present utility model The top half of edge curve is asymmetric with the latter half, and top half development length is more than the latter half, and concave surface outer counter Top and the bottom symmetrically, the vertical height of concave surface inner edge is more than the vertical height of outer rim, but the tangentially projecting length of concave surface outer rim Degree is more more than the tangentially projecting length of inner edge.Be conducive to inside blade catching the bubble rising and being allowed to be distributed in liquid phase, increase Strong hold gas performance；During blade extends laterally, its axial height gradually tapers up, and is conducive to saving energy expenditure.

(2) agitating device of the present utility model has higher Gas-Liquid Dispersion and mixed performance, preferably power consumption characteristics, energy Substantially reduce the generation of cavitation, improve gas spotting out during stirring operation.Can be applicable to ventilation stirring fermentation, hydrogenation, In the course of reaction such as oxidation reaction and bio-aeration.

Brief description

Fig. 1: the axonometric chart of agitating device of the present utility model；Wherein, 16 liquid level, 17 back of the body liquid levels, 18 blades, 19 circles are met Disk, 20 wheel hubs, 21 agitators, 22 shafts；

Fig. 2: agitating device of the present utility model schematic diagram in the reactor；Wherein, 23 power set, 24 gas distributions Device, 25 baffle plates, 26 liquid levels, 27 bubbles, 28 fluids, 29 reactors, 30 agitator devices；

The hatching axonometric chart meeting liquid level of Fig. 3: the blade of agitating device of the present utility model；Wherein, the radial direction of 1 blade The axial section line of inner side, the axial section line of the outermost radial outside of 2 blades, guide margin on 3,4 times guide margins, 5 trailing edges, inside 6 The top of axial section line, the bottom of the axial hatching in 7 inner sides, the top of the axial hatching in 8 outsides, the axial hatching in 9 outsides Bottom, 10 inner top side points, 11 inside lower end points, 12 inner side tail points, 13 outer upper end points, 14 outside lower extreme points, outside 15 Tail point；

Fig. 4: agitating device of the present utility model blade inside (left) and outside (right) hatching and scale diagrams；

The radial direction front view of Fig. 5: the blade of agitating device of the present utility model；

Fig. 6: the upward view of agitating device of the present utility model；

The rushton agitator of Fig. 7: cd-6 type oar；

The agitator of the linear oar of Fig. 8: Unsymmetrical Parabolic.

Specific embodiment

Embodiment 1: agitating device

As shown in Figure 1, Figure 2 and shown in Fig. 6, agitating device (30) involved by this utility model include an agitator (21), A piece shaft (22) and a set of power set (23), wherein agitator (21) include disk (19), a wheel hub (20) Blade (18) with several circumferentially extendings.

Blade (18) is to be obtained by meeting liquid level (16) and increase certain thickness backward, obtains blade (18) after thickening, and Obtain carrying on the back liquid level (17).

The axial section of blade (18) is v font, and the interior line of v font is referred to as hatching, and its shape can be thrown Thing line, hyperbola, oval camber line and circular arc line etc., are preferred with parabola.

As shown in Figure 3 and Figure 4, with disc centre place horizontal planeFor boundary, hatching can be divided into upper and lower two parts. Upper and lower two parts are tail point in the intersection point of disc centre place horizontal plane, and tail point radially extends the trailing edge that the side obtaining is blade. Two other end points of hatching upper and lower part radially extend the guide margin that the side obtaining is blade.Prolonged by inner top side point (10) Reach outer upper end point (13) and obtain guide margin (3), by inside lower end point (11) prolong 12 reach outside lower extreme point (14) obtain under Guide margin (4).Outside tail point (15) is extended to by inner side tail point (12) and obtains trailing edge (5).

Hatching is not unalterable during circumferentially extending, and be as radially extending the change of distance and Equal proportion changes, and changes the position of upper and lower part end points simultaneously so that section height reduces and the area of section is constant.It is specially Near shaft side, that is, top (6) width of the axial section line (1) of the radially inner most of blade is larger, and bottom (7) are wide Degree is less, and in radially extending process, upper width is gradually reduced, and lower width is gradually increased, and is highly gradually reduced, final on Portion's width is equal with lower width, is highly compressed to a certain degree, namely blade is in the side away from shaft, its blade Top (8) width of the axial section line (2) of outermost radial outside, bottom (9) width are equal.

As shown in figure 4, either in the hatching of radially inner most or the hatching of outermost radial outside, its underpart one Point is all equal apart from d with top corresponding point to horizontal plane apart from d ', equally, in any position radially extending to horizontal plane Place all follows this rule.

The radial direction front view of blade (18) is as shown in figure 5, more intuitively present the shape facility of above-mentioned blade.

The upper width (being represented with b) of blade (18) axial section line is as follows with lower width (being represented with c) relation: is leaning on Nearly shaft region, i.e. the radially inner most of blade, its axial section line (1) upper width b₀Ratio lower width c₀Greatly, top ratio The part that bottom projects is conducive to capturing the bubble (27) rising to strengthen disperseing, and optimal design is lower width c0 and top width The ratio of degree b0 is for 0.5～8.5,0.75 more preferably；Away from shaft region, the i.e. outermost radial outside of blade, its hatching (2) Upper width b_nWith lower width c_nEqual, because outermost reduces to the demand of capture bubble；Blade mid portion, it cuts open The upper width of upper thread tapers in stretching process radially outward, and scope is b₀～b_n, lower width becomes larger, scope For c₀～c_n.

The height (being represented with d) of blade axial direction hatching, that is, extend to the axial distance of two end points of guide margin, close Shaft region, the height d of the blade radial axial section line (1) of inner side₀Scope be 0.1～0.35 times of agitator straight Footpath, 0.25 times more preferably；Away from shaft region, the height d of hatching_nWith d₀Ratio be 0.4～0.9,0.6 more preferably；In blade Between part altitude range be d_n～d₀.

As depicted in figs. 1 and 2, agitator (21) has six blades (18) to be arranged on disk (19).The quantity of blade can To be 4～10,6 more preferably.Blade (18) is distributed in disk perimeter, and trailing edge (5) is fixed together with disk (19), i.e. leaf Piece is partially submerged in disk to ensure its mechanical strength.The diameter of disk (19) is preferably existed with the diameter ratio of agitator (21) Between 0.5～0.8,0.68 more preferably.The diameter of agitator (21) refers to two apart from the distance between farthest tail point (15).

Disk (19) can be other shapes, ribbon of such as middle hollow out etc..The thickness of disk (19) is less than it partly Footpath.

Upper width b near shaft region blade axial direction hatching (1)₀Preferably exist with the ratio of stirrer diameter Between 0.1～0.35,0.2 more preferably.

Upper width c away from shaft region blade axial direction hatching₀With the ratio of stirrer diameter preferably 0.1～ Between 0.4,0.25 more preferably.

The radical length of blade (18) be length and the stirrer diameter of trailing edge (5) ratio preferably 0.15～0.4 it Between, 0.25 more preferably.

Agitator (21) is connected with shaft (22) by wheel hub (20), and wheel hub (20) can make agitator (21) with It is very firm that shaft (22) connects.

Power set (23) include motor and speed reducer (not drawing in detail), and power set (23) make agitator obtain rotation Power.Agitator (21) is preferably horizontally upper to be rotated, to keep its balance.

As shown in Fig. 2 agitator (21) is used in the reactor (29) equipped with a certain amount of fluid (28), fluid (28) can To be a kind of liquid, the mixture of several liquid or particle suspensions etc., the shape of reactor (29) can be cuboid, cylinder Body etc., is preferred with the cylinder with ellipse head.General addition baffle plate (25) in reactor (29), to prevent or to reduce rotation When whirlpool generation.

, preferably between 0.3～0.5,0.33 more preferably for the diameter ratio of agitator (21) diameter and reactor (29).

Agitator (21) is preferably mounted on the near-bottom of reactor (29), can be used alone it is also possible to other footpaths It is used in mixed way to stream or axially stream agitator composition stirring system.Fluid (28) in reactor (29) during use needs submergence to stir Device, that is, liquid level (26) is higher than agitator (21).

The following of agitator (21) needs to install gas distributor (24), and the effect of gas distributor (24) is to fluid (28) In be passed through bubble (27).Gas distributor (24) can be one or several breathers (not drawing in detail), ventilation ring or its His type, the ventilation direction of gas distributor (24) can be can also to be downward upwards.

The material of agitating device is rustless steel or other intensity height and corrosion-resistant material, such as carbon steel.

The concrete operations of agitating device (30) are as follows, and gas distributor (24) blasts bubble in the interior fluid of reactor (29) (27), bubble (27) rises because its density is low, power set (23) provide power make shaft (22) and agitator (21) with Certain rotating speed rotates in the horizontal direction, and the bubble (27) that blade (18) capture of rotation rises is so as to fluid with surrounding (28) radial motion together, makes bubble (27) broken and coalescence occur thus being dispersed in stream by shear action in motor process In body (28).Above agitator (21) and be formed below two circulation flow patterns, by bubble in gas distributor (24) (27) release and the purpose being rotated up to Gas-Liquid Dispersion and mixing of agitator (21).

Said apparatus form be this utility model preferred embodiment, but form of the present utility model be not limited to that it is allowed to Make modification within the specific limits.

Although this utility model is open as above with preferred embodiment, it is not limited to this utility model, any Person skilled in the art, without departing from spirit and scope of the present utility model, can do various changes and modification, therefore originally The protection domain of utility model should be by being defined that claims are defined.

Claims (10)

1. a kind of agitating device is it is characterised in that described agitating device includes agitator, shaft；Wherein agitator includes justifying Disk, wheel hub, multiple blade with respect to shaft circumferentially extending；The liquid level axial direction contour line that obtains of cutting of meeting of described blade claims For hatching, hatching is divided into upper and lower two parts with disk place horizontal plane for boundary；In the blade radial hatching of inner side The tangential width of upper part is bigger than the tangential width of lower part, in radially extending process, the tangential width of hatching upper and lower part Degree increases simultaneously and bottom is bigger than the amplitude that top increases, and axial height is gradually reduced, and the area of section keeps constant, blade simultaneously The tangential width of the upper and lower part of the hatching of outermost radial outside is equal and axial height is less than inner side；The described area of section is The area of the plane domain that the straight line that two end points of finger hatching connect into is surrounded with hatching.

2. agitating device according to claim 1 is it is characterised in that described hatching is divided into upper and lower two parts, in difference Hatching at radial position is all different；Blade radial inner side the lower width of hatching with the ratio of upper width be 0.5～0.85；The top of the outermost hatching of blade radial is equal with lower width.

3. agitating device according to claim 1 is it is characterised in that the blade of described circumferentially extending is arranged on disk, The trailing edge of blade is fixed on disk.

4. agitating device according to claim 3 is it is characterised in that the diameter of described disk with the ratio of stirrer diameter is 0.5～0.8.

5. agitating device according to claim 1 it is characterised in that the radical length of described blade and stirrer diameter it Than for 0.15～0.4.

6. agitating device according to claim 1 is it is characterised in that described hatching is parabola, hyperbola, elliptic arc Line or circular arc line.

7. agitating device according to claim 1 is it is characterised in that the axial direction of the outermost hatching of described blade radial The ratio of the height and blade radial axial height of the hatching of inner side is 0.4～0.9.

8. agitating device according to claim 1, it is characterised in that described disk, each disk is evenly equipped with blade, leaf The quantity of piece is 4～10.

9. agitating device according to claim 1 it is characterised in that described blade radial inner side hatching height Ratio with stirrer diameter is 0.1～0.35；The diameter of agitator refers to two apart from the distance between farthest tail point.

10. a kind of reactor is it is characterised in that described reactor contains the arbitrary described agitating device of claim 1～9.