CN1050606A - Agitator - Google Patents

Abstract

A kind of improved agitator that is applicable to the flow-type drying machine.The import and export of agitator are joined with the inlet ducts and the dry catheter of drying machine respectively.Characteristic when outlet has outlet valve to leave agitator with the control material via outlet.Import has the deflector member, when the material in the agitator is subjected to the effect of blade radial power and when hitting deflector, can make it to return the rubbing effect that teeter chamber in the agitator accepts blade, avoids material to enter in the combustion chamber against thermal current.Each sheet blade in the agitator comprises a free end and contiguous free-ended deflection surface, and the material that hits the deflection surface is moved inwardly, increases the rubbing effect of agitator.

Description

Agitator

The present invention relates to a kind of improved agitator that is applicable to the flow-type drying machine, this kind flow model drying machine has an inlet ducts, for agitator, is thereafter dry catheter then.The inlet and the inlet ducts of agitator join, and outlet is then joined with dry catheter, and an outlet valve is arranged for other so that the characteristic of control material when leaving agitator via agitator outlet.The outlet characteristic is meant the characteristic of a particle in agitator, and this agitator can skim over particle therein and enters dry catheter, so the key property of particle in agitator just can show in outlet.Main outlet characteristic comprises weight, density, surface area, volume and shape, and these characteristics relative importance to each other is to decide according to the essence of handled material.

In the flow-type drying machine, preferable agitator type is a rotary agitator, the used rotating shaft of this kind agitator has some arms or blade, these arms or blade are that design maintains the moist material that entered by import in the thermal current always in agitator, till these materials become powder, so these materials after becoming the powder state, just can be sent to dry catheter by thermal current.One loader is arranged outside agitator, and material can be delivered to agitator via this loader, and loader preferably has an input unit or bamboo clappers.The teeter chamber of agitator has relative end wall and the curved wall between end walls, and blade is around the rotation of the rotating shaft in the teeter chamber, simultaneously with very the cylindrical space near stir chamber wall is tangent.

The agitator outlet valve preferably is positioned near the agitator outlet, so that control is stirred into the outlet characteristic of powder shape material, leaves the outlet characteristic of the powder shape material of agitator and can be controlled by the size of agitator outlet.The agitator outlet valve can limit the size of agitator outlet, so when if powder is still too big, can't be flowed out by outlet, become smaller and must stay in the agitator up to powder.Therefore, can control the time of material lagging in agitator.

In the employed agitator of prior art; when the material of handling as bone one class; bone is curved song through regular meeting through the agitator import time; and owing to put on the speed of bone; and the factor of bone size itself etc.; the bone powder may flow backwards against air-flow, enters the combustion chamber via import.In addition, the particle in agitator has the trend of impelling these particles to do radial motion outwardly because of the rotation of blade, so, must make particle in the space at its place as far as possible with the rotation of blade to strengthen crushing effect.

Therefore, the agitator that uses among the present invention mainly is to be suitable for the flow-type drying machine, so that the material of being imported is broken into powder, and use hot gas to remove aqueous vapor contained in the powder, the mode that this flow-type drying machine is arranged is an inlet ducts, then be agitator, it then is dry catheter thereafter, agitator has a teeter chamber, its import is connected with inlet ducts, outlet is connected with dry catheter, dispose blade for rotation usefulness in the teeter chamber, the agitator outlet comprises an agitator outlet valve, comprises a deflector member of crossing over the import of part agitator in agitator import department, when the material in the agitator was subjected to the collision of blade and hits this deflector member, this deflector member can make those materials return the rubbing effect that the teeter chamber accepts blade.

The preferred versions of deflector member is a deflecting plate that parallels with the cylindrical tangent line of fabricating, and this cylinder of fabricating is by being limited with the tangent camber line of the free end of rotating vane, therefore, if when deflecting plate extends out, can be crossing with this tangent line.The deflector member can be fixed, and also can make the angle that adjustment is to a certain degree intersected with change and this tangent line.One of advantage of this deflector is also can be used for the thermal current of leader preferentially to flow to the free end of blade.

Mixing arm can be an Any shape, but each sheet blade preferably comprises a free end and contiguous free-ended deflection surface, this deflection surface can preferentially be stirred material to blade inwardly, rather than makes material along radially skimming over blade, therefore can make material keep bump with blade as far as possible.

In order further to understand the present invention, understand actual effect of the present invention simultaneously, below we will do accompanying drawing briefly bright,

Fig. 1 is the vertical sectional view of the part of flow-type drying machine, wherein comprises according to agitator of the present invention;

What Fig. 2 showed is the form that is suitable for the preferable mixing arm that the teeter chamber uses among Fig. 1;

Fig. 3 is the mode of operation that teeter chamber among Fig. 1 is described in the mode of legend.

At first with reference to figure 1, what wherein show is the vertical sectional view of the part of flow-type drying machine 10, comprises according to disclosed agitator 11.Flow-type drying machine among the figure is used for material is twisted into powder, and utilizes hot gas to remove aqueous vapor contained in the powder.The form of this flow-type drying machine comprises an inlet ducts 12, for agitator 11, is dry catheter 13 then then.In illustrated this embodiment, agitator 11 comprises teeter chamber 14, and the import 15 of teeter chamber is connected with inlet ducts 12, and outlet 16 is connected with dry catheter 13.On the rotating shaft 18 of a plurality of blade 17 devices in the teeter chamber.Agitator outlet 16 comprises an agitator outlet valve 19, agitator import 15 comprises a deflection member, the form of this deflection member is a deflecting plate 20 that extends across the import of part agitator, be subjected to the percussion of blade and when hitting deflector, this deflector member can make those materials return the rubbing effect that the teeter chamber accepts blade 17 with the material in the convenient agitator.

In illustrated embodiment, agitator outlet valve 19 comprises a deflecting plate 21, and this deflecting plate can be articulated on the axle 22 and reach 180 ° radian.As shown in Fig. 1, inlet ducts 12 all is vertical with the normal position of dry catheter 13, and therefore, when deflecting plate 21 is during in vertical position, what influence outlet valve 19 almost do not have for the time that material is trapped in the agitator.Yet, under normal situation, heavier material can depart from wall part 23 in agitator, and before moderately being twisted into powder and removing aqueous vapor, can be introduced into dry catheter, and this moment, deflecting plate 21 can depart from the upright position, therefore, material can knock deflecting plate 21 and get back to the teeter chamber and recycle again, continues to be subjected to the rubbing effect of blade 17.In the agitator import similar effect is arranged also, in this embodiment, deflecting plate 20 is fixed, but can as deflecting plate 21, be adjustable also, when path that material is advanced during with tangential that the free end 24 of blade 17 is become, can hit deflecting plate 20, therefore get back to the conduct scope of blade 17 again and accept rubbing again.

From Fig. 1, it can also be seen that, deflecting plate 20 at agitator import 15 places can also provide an auxiliary function, deflecting plate 20 is divided into two paths 25 and 26 to the agitator import, and free end 27 can be tackled the thermal current that flows to agitator, make most thermal current by path 25, therefore make the position of the free end 24 of most thermal current bypass ground guiding blades adjacent 17.So, owing to act on the result of the centrifugal force on the material in blade high speed rotating and the agitator, most of particle in the agitator can be near the free-ended position of blade, because the most of thermal current that is entered flows to zone 28, so make this zone receive the heat of maximum.

As shown in the figure, the free end 24 of each sheet blade 17 comprises a deflection surface 29, the material that hits deflection surface 29 is flown to towards rotating shaft 18, therefore can eliminate along radially outer to a certain extent and move, because the particle in the agitator more or less can be subjected to the influence of this radial motion because of the free end 24 of blade 17.

Also comprise a flow control valve 30 among Fig. 1, can adjust the mass flowrate that flows to the hot-air of agitator with change, and the main thermal current that makes a part is guided along inlet pipeline 12 and enters subsidiary conduit 31, enters dry catheter 13 and directly see through porous plate 32.Return-flow catheter 33 can be used to make the material that is not fully rubbed or remove aqueous vapor to get back to the upstream position of agitator 11, and circulates in agitator 11 the insides again.

With reference now to Fig. 2,, shows among the figure according to the blade 17 that the present invention built to be used in more detailed situation in the agitator.As shown in the figure, mixing arm 17 comprises free end 24, and deflection surface 29 is all arranged on each free end.In the running, the proper motion direction of the free end 24 of blade 17 is directions of arrow 34 indications.Therefore, when blade was following this path and scans, surface 29 and 35 formed blade inlet edges can clash into the particle in the agitator, and on the bump contact point, blade inlet edge can produce the motion of tangential direction to particle.The result of repeated impact (the collision between particle and particle) can cause the accumulation of most of particle, produces flowing of ring-type at the blade free end.Along with the free end 24 of particle convergence blade, particle can be run into deflection surface 29, makes their scanning in the path of blade 17 of being flow backwards back again.For bigger particle, because have a bigger cross section, therefore, above-mentioned effect has a significant effect to these bigger particles, makes possibility of collision increase between these particles.This process continues to carry out a period of time, enough allows their be swept from agitator up to the outlet characteristic of these particles and enters dry catheter.What this will understand a bit be, particle near free end 24 motions does not need to have reached desired outlet characteristic, but because the structure of blade, the major part in these particles can circulate in agitator again, till they reach desired outlet characteristic.Under the structure of this blade, described in the past radially departing from can disappear, can guarantee at the main exit place near the free-ended most of particle of blade, blade free end 24 caused collision results and reach desired outlet characteristic no thanks to, but owing to the effect of agitator reaches desired outlet characteristic.

With reference to figure 3, be illustrated further according to the action of the suggested agitator of the present invention.In the drawings, for the sake of clarity, the blade of agitator is omitted and does not draw.But used label is with foregoing identical.

As shown in the figure, deflecting plate 26 is divided into first air-flow 37 and second air-flow 38 to the thermal current that is transported to agitator, this twice air-flow passes through path 25 and 26 respectively, the air-flow 37 that occupies the major part of air-flow 36 is sent to the foot of agitator 11, have most particle to be run in this zone, air-flow 37 is high-intensity thermal currents.To outlet 16 o'clock, in this process, particle can be subjected to the bump that scans of blade to the thermal current that has a particle from entry zone 15, the particle that has reached the outlet characteristic just is introduced into dry catheter 13 in outlet 16, thereafter particle can be by suitable separator, as cyclone, separates and removes from thermal current.Before entering dry catheter, some particles are may be because of the degree of rubbing not enough or still residual aqueous vapor is arranged, and come back to agitator.Those have fully been rubbed and dry particle does not bump against deflecting plate 21 if leave agitator, still can have been returned the bump that agitator is accepted blade again.Equally, when bigger particle returns the agitator import if reach agitator outlet, can be subjected to the effect of radial component or tangential component, cause these particles to be departed from agitator and enter the combustion chamber against thermal current.But because the existence of deflecting plate 20, these particles can be got back in the path that blade scans along the direction shown in the arrow 39 because of the effect of deflecting plate, therefore, these particles can further be rubbed and be removed aqueous vapor again, till particle reached the outlet characteristic, at this moment, particle can be guided and enter dry catheter, this mainly is the result of thermal current effect, rather than the result of blade effect.

Top explanation is to use an example of the present invention, and for those of ordinary skills, other variation of many kinds and modification model do not break away from category and the field of being narrated in claims, and this is conspicuous.

Claims (4)

1, a kind of agitator that is applicable to the flow-type drying machine, can be used to material is rubbed into powder, and use thermal current to remove wherein contained aqueous vapor, the pattern of flow-type drying machine is to use an inlet ducts, then be agitator, then be a dry catheter again, agitator comprises a teeter chamber, have an import that is connected with inlet ducts and an outlet that is connected with dry catheter, on the turning cylinder of a plurality of bladings in the teeter chamber, the agitator outlet comprises an agitator outlet valve, the agitator import comprises a deflection member of crossing over the import of part agitator, gets back in the path that blade scans so that will be guided again by the material that blade is thrown to deflector.

2, agitator according to claim 1, it is characterized in that the deflecting plate that the deflecting plate member is had, the direction of its extension is roughly parallel with the virtual tangent plane on the imaginary cylinder, and this cylinder of fabricating is by being limited with the tangent camber line of rotating vane free end.

3, agitator according to claim 2 is characterized in that the residing position of deflecting plate is, if deflecting plate extends out, can intersect with tangent plane.

4,, it is characterized in that each sheet blade comprises a free end and contiguous free-ended deflection surface, is suitable for making the material that hits the deflection surface to produce a direction motion inwardly according to any one described agitator in the claim 1 to 3.

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