CN87105185A - The drying means of solid, porous particles and device - Google Patents

The drying means of solid, porous particles and device Download PDF

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Publication number
CN87105185A
CN87105185A CN198787105185A CN87105185A CN87105185A CN 87105185 A CN87105185 A CN 87105185A CN 198787105185 A CN198787105185 A CN 198787105185A CN 87105185 A CN87105185 A CN 87105185A CN 87105185 A CN87105185 A CN 87105185A
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CN
China
Prior art keywords
particle
liquid
dusty material
blade
rotation
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Pending
Application number
CN198787105185A
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Chinese (zh)
Inventor
皮特勒斯·弗朗西斯卡斯·阿方斯乌·玛丽亚·亨德里克斯
约瑟夫斯·约翰尼斯·皮特勒斯·玛丽亚·戈顿
约翰尼斯·阿方斯·斯蒂恩
简·阿诺德·德鲁艾特
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Stamicarbon BV
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Stamicarbon BV
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Publication date
Priority claimed from NL8601923A external-priority patent/NL8601923A/en
Application filed by Stamicarbon BV filed Critical Stamicarbon BV
Publication of CN87105185A publication Critical patent/CN87105185A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/08—Drying solid materials or objects by processes not involving the application of heat by centrifugal treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/28—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rollers or discs with material passing over or between them, e.g. suction drum, sieve, the axis of rotation being in fixed position

Abstract

Porous, solid particle that a kind of method is used for containing liquid carry out the drying processing, each particle will produce single rotatablely moving, power on surface that acts on particle that this angular velocity of rotation work produces and the inner liquid will surpass the affinity of liquid and particle, so that will be gone out by the fluid separation applications of getting rid of on the particle.Be used to handle the device of dusty material, this device is identical by two shapes, and the surface composition of settling that parallels, the distance between this two surface is very short, and be actuated to different relative velocity rotations, also have powder feeder, powder removal device and liquid discharge device.

Description

The present invention relates to a kind of device that the drying solid porous contains the method for liquid particles that is used for.
Known similar method can find from NL-A-7109221 number.
In this known method, face toward pending material under high speed by a gas stream, at least blow suddenly facing to a percussion mechanism, this Design of device and layout will make to impact and cause solid particle to break away from main gas stream, thus this this solid particle is collected as separating part, and liquid is taken away by main gas stream by impacting by throwing away in the particle.This method is specially adapted to by the main body particle size greater than 0.5 millimeter, and wherein not with internal microcellular structure, and be non-friable pill, the liquid that wherein content is very low is removed away.
The shortcoming of this known method is: contain a kind of internal microcellular structure in particle, and particle is less than 0.5 millimeter (main body particle size), the final content of liquid in the particle to be dried is greater than 10% weight ratio, to mean in this case for further dry this particle, just need quite a large amount of expensive heat energy.This can make an explanation with the of short duration fact of time with distortion is so little from the speed of these particles, because it is considerably strong at little particle and the frictional force between the gas, the impact elasticity of particle is very faint, and stopping mutually between them, so then the size of inertia force just can not be greatly to affinity between the surface tension of surface that can overcome liquid and particle and micropore, in some cases, an additional negative pressure remains in the micropore liquid.
In addition, by particle size recited above greater than 0.5 millimeter, perhaps by having the particle that thin internal microcellular structure reaches percentage recited above, as adopt known method, energy needed is very high, because the speed of gas stream or the speed of particle must be high in the extreme, to realize the removal of liquid.The sound that sends in accordance with known methods also is quite high.
The purpose of this invention is to provide a kind of method, above-mentioned various shortcoming can not appear or occur hardly in this method.
According to the present invention in order to reach this effect, make each particle produce single rotation, under a kind of like this angular speed, act on the liquid and act on the particle and the effect power in it or various power will surpass liquid on particle or intragranular various adhesion, in this method, can separate simultaneously or in subsequent processing subsequently, separate by the liquid of removing on the particle.
Use method of the present invention, little and very little particle, because its is small-sized, under the relatively big frictional force effect of the medium around it, can make individual particle produce effectively rotation with minimum energy, in this speed and have the sufficiently long time, then be bonded on the particle and the microcellular structure of particle in liquid will be thrown out of and get rid of.
In this bright method, mainly be particle under a kind of like this angular speed, the centrifugal pressure 1/2PLW that is produced 2R has surpassed the affinity sum between all liq and the particle, and these power comprise the bonding force of liquid and particle surface and inside and make liquid remain on the interior negative pressure of particle micropore.Represent with formula:
1/2 ·P Lω 2R＞ (4T·Cosθ)/(d) +ΔP
In formula:
The PL=density of liquid,
W=angular speed,
The radius of R=particle major part,
The surface tension size of T=liquid,
Contact angle between θ=liquid and the granular materials,
The maximum radius of micropore in the d=particle,
In the method for the invention, being used to rotate the required friction force of individual particle can be produced by following method, for example,
Method a: will be round the medium of particle can guarantee to produce the rate pattern of enough velocities of rotation, together with in device, supporting a particle, make these particles carry out single rotation and mutually serious obstruction does not take place.The density of particle must be less than 0.75 times of bulk density.
Method b: particle acts on the plane will an enough big normal pressure, and the character on the surface on this plane is wanted to make particle and this plane have enough big coefficient of friction and frictional force.The normal pressure of particle is to be produced by inertia force (centrifugal force, the combination of compound centripetal force or various component), is that a curve track produces by movement of particles for example.Additional inertia force needs, because the short grained gravity of here being considered is inadequate for producing an enough big normal pressure, for example, because (Magnus ' forces) act on the particle of motion is so these power can be cancelled out each other for the turbulent flow power of medium and this power of Magna.
Various effective forces (opposite) with top described each power, this power with act on friction of granule power and offset, can make particle like this under the speed of minimum requirements, along needed orbital motion, these power all are to be produced by the speed of the particle that has surrounding medium, perhaps produce, perhaps both in conjunction with producing by the contact force of particle with moving surface.
An embodiment according to method of the present invention; it is characterized in that: the curvature of described particle track; for example along a fixing face; the character that depends on material to be dried; so that between particle and plane, exist enough frictional force, select the state of each power, for particle provides it with respect to the needed relative velocity in plane; and particle can keep this velocity of rotation to keep the sufficiently long time, so that will remain on particle surface and inner liquid is thrown out and got rid of.What should prevent is that particle is gone through very much evil slidably, and the geometry of equipment and the various conditions that put on non-rounded grain have wanted to make particle the moment of the propulsive force on more contacted or each aspect in plane must be greater than the maximum turning torque of particle.
This particle must be with such velocity function on the surface, and promptly they can unhinderedly or basically unhinderedly rotate.So the supply capacity of its every meter (φ) is less than:
(πVR C(1-ε))/(2a 2)
The V=particle is with respect to the relative velocity on this plane,
Half of the diameter of R=particle,
The density of ρ=particle summary,
ε=in, outer hole part sum,
Measuring of a=circumgranular space size; The a value is greater than 1.
If particle can not slide or only slide a little, then the selection of various conditions must make frictional force surpass propulsive force.
Method of the present invention also is highly suitable for liquid from by excluding the liquid adhesive particle together, for example in wet filter bed or uniformly in the slurry.
Can exclude from grain flow through throwing away the liquid that comes and get rid of, exclusion process is by according to the surface of the front of the whole bag of tricks recited above by in fact in situ the liquid of having separated being sucked up.In some cases, use the second kind of air stream that produces in equipment to use easily, this air stream is taken away the fine liquid particles that throws away the liquid that comes, rather than the particle that is dried is taken away.
Under not being too big situation when grain density, liquid and the particle of having handled can be separated in the outside of equipment, for example adopt displacement method.So in known method, the strict demand by primary air is taken away liquid can not be applied to the present invention.
In the method for the invention, according to the character of dried particles, its final content liquid can reach in 1% weight ratio approximately.
Guiding graininess and fibrous product enter gas stream and then this gas stream are sent into a method in the separator, are known in itself.In this method, in gas stream, finished dry run in fact, for this purpose, this gas stream was through heating, so liquid to be removed at first is vaporize, then, was removed with the form of gas.The separation known device, for example a cyclone only is used for from separated the usefulness of dry products by the dry gas of the liquid that contains absorption.But,, under this this particle each effect action of centrifugal force, liquid is thrown away from micropore by the rotation generation according to method of the present invention.
The invention still further relates to a kind of device that can realize said method therein, this device is characterised in that its first and second surface, these two surfaces all are the identical and arranged parallel of shape, mutual distance is very short, and also contain a kind of device in this device and be used for these two surfaces of different speed drive, a kind of device is used for dusty material is sent in the gap between two surfaces, a kind of device is used for dusty material is removed away by the gap between two surfaces and a kind of device is used for the fluid discharge of being separated like this by particle is fallen.
After will being described by following demonstration in conjunction with the accompanying drawings, other features and advantages of the present invention can come into plain view.Wherein:
Fig. 1 is a schematic diagram that shows first embodiment of device of the present invention;
Fig. 2 is the schematic cross-section of another embodiment of showing that the structure with respect to shown in Figure 1 of device of the present invention is replaced;
Fig. 3 is the schematic cross-section with respect to structure shown in Figure 1 another embodiment through replacing that shows device of the present invention;
Fig. 4 is the structural representation of second embodiment of device of the present invention;
Fig. 5 is the structural representation of the 3rd embodiment of device of the present invention;
Fig. 6 is the structural representation of the 4th embodiment of device of the present invention;
Fig. 7 is the structural representation of the 5th embodiment of device of the present invention;
Fig. 8 is a device of the present invention, by the structural representation of structure shown in Figure 7 another embodiment through replacing;
Fig. 9 is the structural representation of the 6th embodiment of device of the present invention;
Figure 10 is the structural representation of the 7th embodiment of device of the present invention;
Figure 11 is the sectional view according to embodiment shown in Figure 1, in order to show more detailed design and duty;
Figure 12 is the sectional view with respect to structure shown in Figure 11 another embodiment through replacing;
Figure 13 is a kind of many devices as shown in figure 11, sectional view of the device that be arranged in parallel of comprising of the present invention;
Figure 14 is a mass percent curve map that pass through and particle maintenance, and its size depends on the particle size of polyvinyl chloride powder.
Figure 15 shows the inside of micropore and the curve of percent of external volume of outer;
Figure 16 is the mass percent of the particle that passes through and keep, the particle size of Permethyl 99A sample such as depends on;
Figure 17 is the increase (X-axle) that shows polypropylene-polyethylene integral micro polymer pore volume, with centimetre 3The expression of/gram is as pore radius (Y-axle); Function curve with micron (μ M) expression;
Figure 18 shows a kind of withering product, the product again of the enlarged photograph before test,
Figure 19 shows the enlarged photograph image of product before test that carries out drying;
Figure 20 is at the later enlarged photograph image of test according to product shown in Figure 180;
Figure 21 is at the later enlarged photograph image of test by product shown in Figure 19.
In an embodiment of method of the present invention, particle is imported between the same basically plane of two shapes, this two plane has a relative velocity on the angled direction of particle motion, will sponge through one or two plane for the liquid that throws away.This plane speed each other then produces a gas velocity model on two planes.Acting between frictional force on the particle and particle and each wall some contacts and causes particle to be rotated.Because this rotation, liquid just is thrown out of.The liquid that throws away can be sponged by one or two plane, perhaps can be by separating by the title position in treatment step subsequently in the solid particle.The selection of two interplanar distance h and relative velocity will make it satisfy following equation:
P L V h 2 R R ＞ 4 T c o s θ d + △ P
In the formula:
The PL=density of liquid;
The relative viscosity that V=two planes are mutual;
H=two interplanar distances;
The surface tension of T=liquid;
The contact angle of φ=liquid;
Half of R=particle diameter;
The intragranular maximum pore radius of d=.
In the present embodiment, the axle on two planes if possible, is preferably sent on the direction of this device perpendicular to particle.In this case, these all are the variablees that can independently adjust.
First embodiment as shown in Figure 1, wherein said two planes all are two surfaces vis-a-vis of two parallel plane discs 1 and 2, axle that the symmetry of two disks overlaps and their plane are with opposite direction rotation around the symmetry axis in horizontal plane.If this device is to be limited to two disks, pending product is to import between the disk 1 and 2 by a hole 3 at disk 1 center.
The rotary speed that frictional force between the gas velocity model that is produced and two disc surfaces and the particle causes particle to produce is enough to make moisture to be thrown out.Particle in the peripheral course of conveying of disk, got rid of effectively in granule interior with attached to lip-deep moisture like this.
Provide a hollow shape and be provided with mutual face-to-face two sidewalls 5 and 6 that can permeate moisture by one of them or two in disk 1 and 2, as shown in Figure 2, and absorb moisture by this sidewall, can be by the moisture that throws away in the particle by getting rid of in the product stream.
Absorption process can carry out realizing by the blade 4 that is arranged in addition on disk 1 and 2, needing to avoid the obturator of rotation.
Present embodiment is as follows with respect to the advantage of known method:
-for diameter particle very little and that have the fine holes structure, can carry out drying and be less than the 1%(weight ratio);
-energy consumes much smaller;
-this method is applicable to the particle of Any shape;
-to the hardness of particle, this class performance of roughness or impact elasticity does not require;
-the sound that sends is much smaller.
Example 1 relates to the condition more specifically that will obtain.
In the above-described embodiments, by produce an air stream entad between disk 1 and 2, just can import the product of handling on periphery, and emit from the center, as shown in Figure 3, delivery pipe 7 is exactly the centre that is placed on disk 2.
This method can realize equal liquid removal amount and the advantage of its demonstration is: its handled product becomes on a very little cross section and can obtain, this situation is to down-stream system such as qigong induction system such as pneumatic transfer system, and tube conveyer etc. are very beneficial.
In different most preferred embodiments, two planes are the planes on opposite of the hollow cylindrical shell of two coaxial arrangements, as shown in Figure 5.Loader is with 10 expressions, and the product of drying emits by 11, and liquid is absorbed at 12 places.
In the another one most preferred embodiment, two planes are two hollow cones of coaxial arrangement, and the plane of two opposite faces of rotation in the opposite direction.As shown in Figure 5, wherein 10,11 and 12 represent import respectively, the outlet of the product of drying and liquid absorber.Latter two embodiment can be applied to the special circumstances of design that need be more compact.
The removal of carrying out liquid by interior pipe or inner cone is to have superiority most.This is shown in the figure that has mentioned.
In other another one most preferred embodiment, particle is by sending into the shape of a pocket in the cloth of a rotation.As shown in Figure 1.This method is similar to embodiment as shown in Figure 1 in many aspects and is suitable for the drying of very frangible particle is handled.Particle is sent into and is discharged by 15 and 16 respectively.
In an embodiment who operates according to method b, as shown in Figure 7, particle is radially to send into by a rotary fan 20 of being with blade 21.The shape of blade and material will make particle produce rotation or because the frictional force that acts on the particle along blade produces rebound, and their rebound and rotation will be in such state: granule interior and outside moisture are pulled out.Centrifugal action power can be made of centrifugal force and/or each component of compound centripetal force, this compound centripetal force is to be produced by the contact force of the blade that moves to particle, in addition, the pulling force that the gas that is produced by blade itself flows can as pulling force or by the gas stream of external device (ED) between blade, the purposes of its pulling force just can realize.
Can be by blade 21 be had hollow shape, and sidewall 22 is made absorbable structure moisture is separated, perhaps moisture is separated from grain flow by displacement.In removing the process of moisture, the second strand of gas stream that is produced by blade also can play a role.
In another most preferred embodiment of this method, fan has straight blade 21.Pending particle is that a center is sent into, and rolls then and bounces and advance towards periphery through straight blade, carries out in the process in this method, and inside and outside moisture just is thrown out of effectively and gets rid of.Compound centripetal force acts on the particle that advances towards periphery that rolls and bounce, and is provided as the needed normal pressure of rotation to them.
By blade moisture removal is fallen, this blade is a liquid permeable.The rotation of blade itself provides desired suction.Particle is sent into by 23 places that are positioned at the centre, and liquid is by emitting by 24 in the device, and dry product is discharged through 25.
The present embodiment is compared with known method, has the following advantages:
-to size very little and have very the particle of fine holes structure and can in this device, carry out the drying processing, its moisture is less than the 1%(weight ratio) because particle can rotate under very high speed;
-energy consumes much smaller;
-Design of device can be very compact and fairly simple.For example according to the device of method design of the present invention, vaporizer wherein is removable, and this vaporizer is to be used in several heat driers, sends into a wet filter cake in each heated drying.Not only vaporizer can be saved, and also needs to send in addition more a spot of water in this device;
-the sound that sends is also much smaller.
In another most preferred embodiment, blade 21 is crooked, and in this case, frictional force is only very a little bit smaller above the power that the promotion particle advances, and this can be by coming the curvature of suitable selection blade to reach specially for this purpose.The remainder of this method the same with described in the example of front.The advantage of comparing this method with known method is that the normal pressure that acts on the particle is less, this means that frictional force is less, and broken situation takes place when handling frangible material alleviates.
In a different most preferred embodiment, (see figure 8), pending product imports between the blade of fan, and the rotation of camber blades is opposite with the normal rotation direction of helicoidal pump blade.In the method, particle is sent into by the outside of fan periphery, and under the effect of various power, if desired, one outside air stream that produces is flowed towards inner rim between blade by fan periphery outside, particle be rotation with the flowing through of resilience towards inner rim.If this requirement is arranged, moisture just can be got rid of by the shown mode of Fig. 5.Particle is sent into by 30, and liquid emits by 31, and dried granules is discharged by 32.
The advantage of this method be the powder of treated mistake on a little cross section, being getable, this is good to the conveying of particle for further utilizing qigong system and particle being sent to pneumatic conveying drier (being also referred to as flash dryer or circulation drier).
In a different embodiment (b on principle), particle is to utilize pneumatic propelling to import through the concave surface of a curved surface.The frictional force that is produced by normal pressure provides particle to be rotated needed moment.Frictional force must be wanted enough greatly to guarantee that particle can rotate under the speed that requires.This is to reach by the suitable curvature of selecting a plane and suitable material (coefficient of friction between particle and this plane), and has guaranteed that the motion of particle is to advance through crooked plane under a sufficiently high speed.
Under non-circular particle situation, normal pressure must always can make particle produce spring to the moment that can guarantee pneumatic propulsive force for a short time.Must guarantee that particle carries out single rotation.If this necessity is arranged, curved surface can have rotational motion, to increase the time of staying of particle in equipment, perhaps lowers the size of normal pressure.In a most preferred embodiment, particle is to utilize an air stream to import between two surfaces, if desired can surface configuration is the same.The selection of the distance between two will make and meet the requirements of under the air velocity condition, and its energy is as much as possible little.
In the method, if desired, selecting the surface of several same shapes and they are fitted together becomes a spirality and is good.By liquid permeable and also remove the curved surface of moisture with absorption, fluid separation applications is gone out guaranteeing.It is not need moving component that this method is compared its advantage with the method that the front had been mentioned.
In the another one most preferred embodiment of the present embodiment, air stream by a blade along the curved surface generation of moving.The surface of roller track can be a circular curved slab, has a product on it and sends into place 40 and discharging place 41, as shown in Figure 9.Liquid is got rid of by 42.The air stream that is produced by blade can be used for the removal of moisture, and its working method as shown in figure 10.Therefore, little water droplet emits in the centre of roller track after throwing away.A surface that only is used for permeation liquid just no longer needs to be used for the separation of liquid.Sending into and discharge respectively of product undertaken by 50 and 51.The discharging of liquid is finished by 52.
The present embodiment is compared with each known embodiment, and its advantage is:
-much smaller energy consumption;
-for particle very minor diameter and that have the fine holes structure, after drying was handled, humidity can reach the weight ratio less than 1%().
The equipment of rolling drum barrel and employing single rotating flow device (monoclone) and similar cyclone form also can be used for a kind of embodiment in back (adopting such equipment to make the effect of its performance sorting in this scheme).Above-described the whole bag of tricks is combined, can be applied to various concrete situations and be good.
Device as shown in Figure 11 comprises first disk 101 and second disk 102, in parallel to each other, is being rotatably mounted, and the distance between two disks is very short.Disk 101 is connected with axle 103, and this axle is installed with pivotally by ball bearing 104 and 105, and the frame that ball bearing is installed only demonstrates part 106.
This can be meshed to produce with the toothed top of axle 102 at the one end and rotatablely move by a cingulum, and this other end has a motor, does not show among the figure.
Axle 103 has a hollow passageway 110, and the central tapered channel 115 of this passage and disk 101 is termination mutually.This hollow passageway 110 is to be lining with a stationary tube 112, and this stationary tube is supported on the bearing in the axle 103, and can turn round, and is driven when rotating with box lunch axle 103, can be in relative static conditions by 112 pairs of axles 103 of holding tube.
End facing to disk 102 of disk 101 has a cannelure 120, utilizes the ring plate 121 of a screen material to cover.The powder of stainless steel of sintering, can according to a brand name bought (the selling) of Poral-Inox-plate by AL Liages Frittes Metafram, as the best goods of this purposes, but other screen material with desired mechanical performance equally also is available.Groove 120 is connected with surrounding environment by one or more passage 122, and further be connected with a vavuum pump, do not show among the figure, by a passage 123 and a passage in axle 103 124 that is arranged in the disk 101, so that a negative pressure is remained in the groove 120.
Disk 102 is installed on the axle 130, and this axle can be driven rotation, and its rotating manner does not indicate.Disk 105 has a centre gangway, and the tapered end 131 by this channel axis 130 stretches out.Many blades 132 are cast in the end of disk 102.
Disk 101 and 102 and their assembly of supporting arrangement be placed in the cyclone, shown in the schematic diagram among Fig. 1, wherein this disk all is arranged on the top of cyclone.An annular groove 141 is arranged on the sidewall sections 140 of cyclone, and its level height is in the gap location between disk 101 and 102.This groove is that the ring plate 162 that adopts screen material to make covers, and groove 141 is connected with a vacuum extractor, does not show among the figure.It is the same with the used screen material of ring plate noted earlier 121 that the screen material of ring plate 142 usefulness can adopt.But, also can adopt different materials, because desired mechanical performance is very undemanding.
The course of work of this device is as follows: the dusty material that contains a certain amount of moisture is sent into by a pipe 112, and fall on the conical part 131, thus, be pushed to blade 132, the power that this blade applies dusty material makes it further towards the peripolesis of disk 102.
Disk 101 and 102 is driven rotation at least to have the relative velocity difference, produces a big relative velocity difference as much as possible in order to make it, preferably rotates in the opposite direction.Though its mechanism (mechanism) still imperfectly understands, it is contemplated that particle is when the gap location that is imported between two disks 101 and 102, just begin immediately to roll, this rolling movement is because the relative velocity difference between two disks produces, and this speed difference is by being produced by between the different air layer that is driving.
If the relative velocity difference between disk 101 and 102 is enough big, then the centrifugal force on the particle will apply enough greatly to the liquid in each particle, and then the centrifugal force on the particle will apply enough power to the liquid in each particle and it moved towards the surface even it is got rid of.After getting rid of, part liquid just siphons away by ring plate 121 and attached groove 120 thereof.
Particle is while rolling towards the peripolesis of disk 101 and 102.This effect can produce by autotelic disk 101 and 102 is rotated with suitable direction and suitable velocity of rotation.
Therefore, particle will leave the gap between disk 101 and 102 with certain radial velocity component.The all liquid that is discharged will siphon away by ring plate 142 and groove 141.This movement velocity in cyclone of particle also further slows down, and if desired, can utilize this method that more liquid is got rid of from particle, and be collected in the bottom of cyclone.If need like this baffle plate of some inclinations to be set on the sidewall of cyclone, along these baffle plates, particle will move towards the below.Can cause a kind of additional rolling that drying is had further effect like this.
Embodiment as shown in Figure 2, this embodiment and foregoing band top disc and the embodiment that has a liquid discharge channel are different.
In the present embodiment, top disc 150 is entity disks, not with the groove that is used for discharge liquid.One is called porous filter screen 151, as being described in more detail in data NL-A-7109221 number, has been applied to the opposite of the periphery of disk 150 and 102.This porous filter screen 151 is dusting cover hole patterns, and a face is level and smooth through polishing, and in this case, the hole of the inside in filter screen becomes big gradually by the one side of polishing.For example, this can be used for filter screen and reaches by the cross-sectional sizes of selecting suitable metal.
Many passages have been set on the sidewall sections 152, and this sidewall sections forms a spirality channel and formed by the outside of the cyclone inner face towards cyclone.The direction of these passages is the direction of rotation facing to disk 150.The end of these passages just has been higher than the top of the disk 150 on the cyclone inside, and guarantees to have one to face toward the air-flow of the direction of the air stream that the plate Orly by disk 150 drags.Consequently the whole air on disk 150 is actually static.
The operating process of this device is the same with the operating process of device shown in Figure 11 basically.But although at least a portion is by separating in the particle in the liquid, and these particles are when still being between disk 150 and 102, and in this case, liquid does not emit.In case particle and liquid leave the gap between disk 150 and 102, they will be facing to porous filter screen 151 collisions.In addition, liquid is through after the filter screen, still remain on the particle and particle in liquid, in particle, discharge all, and get rid of through porous filter screen.Special-purpose device can be applied to the liquid between porous filter screen 151 and the cyclone inside is got rid of.This device can be made of a collecting pipe and a delivery pipe.
In an embodiment shown in Figure 3, many disks 167 are installed on the vertical axis 160.This axle 160 has a centre gangway 130, and is installed on bearing 162 and 164, can rotate.Bearing 162 is installed on the housing 161, and bearing 164 is installed on the axle 163, and they are to be rotatably mounted by the bearing in frame 166 163, wherein, if necessary, can form total in housing 161.
The assembly of disk 167 be by the system of a disk 171 round, they all couple together each other, and link together with axle 163.The design of whole system is such, and promptly disk 171 stretches out between the disk 167 of each continuous pairs.Each disk 171 is provided with a groove 172.At least the part of each disk 171 is made by screen material, and this screen material is that 121 described requirements provide with reference to the ring plate shown in Fig. 1.Import an effective conduit 174 away from each groove 172 on the one side of axle 160, its cross section is the U type, this conduit only one side of the right in Fig. 3 demonstrates, this conduit 174 stretches to the outside of device, by a passage 175 that passes sidewall 176, to each passage 175, if necessary, can be connected to one in order on the device that produces negative pressure, this device does not show in the drawings.
The operating process of this device is as follows
Axle 160 drives down with different relative velocities with 163, preferably drives with opposite direction.Send into by a centre gangway 180 getting rid of the dusty material that wherein contains liquid, and one of them part of these powder has been distributed at each disk 171 place, used device do not show, imports gap location between the disk 167 and 171 via passage 180 by the radial hole on the axle 160.This device can be made up of blade or baffle plate, and the powder that lost efficacy by its at least a portion can be retained and import towards radial opening.In this state, the powder distribution of sending into is on each level height, and unnecessary powder then can emit so that enter cyclone by a passage on axle 163 and separate.
On each level height between each paired disk 167 and 171, carry out the roll-drying process then, as shown in Figure 11 and Figure 12.
The liquid of separating in this course can pass through groove 172, and conduit 174 and 175 emits.Powder particle emits by the opening 163 between two continuous disks 171 and falls the bottom, collects there.
In this manner, can many this devices shown in Figure 11 or 12, be linked together abreast.
Example 1:
Product is imported one as shown in Figure 1 in the device, this device comprises two flat, disks circle, that flatly be installed with, they have the axis that symmetry overlaps, and these two disks are arranged at a distance of 2.5 mm distance, and have a relative velocity each other.The moisture that is thrown out of is separated by a sorter that is arranged on the device outside.Product is then dull and stereotyped middle through a hole importing two in head slab centre.
Test 1
The particle of processing to be dried is pulverous, and the major part of particle is of a size of 10 microns.Figure 14 shows the distribution situation of particle size, and wherein the X-axle is represented the % greater than the particle size of main body, and the Y-axle is represented the % less than the particle size of main body, and the Z-axle represents that particle size is in micron.The internal capillary distribution situation of powder as shown in figure 15, wherein the X-axle is represented pore radius in micron, and the Y-axle represents that micro pore volume accounts for the % of cumulative volume.
Test 1a
The product of sending into is a wet cake that water content is 30% weight ratio.Two disks rotate in the opposite direction, and wherein the velocity of rotation of top disc is 3375 rev/mins, and the velocity of rotation of bottom disc is 3545 rev/mins.When product imports for the first time between (1x) two disks and moisture has been removed by the sorting of treatment product, product still contains the moisture of 16.4% weight ratio.It is 6.4% weight ratio that the after-treatment of this product causes water content.Handle that to cause the product water content be 0% weight ratio for three times.
Electron micrograph represents that product is not damaged.See Figure 18 (showing before dry the processing) and Figure 20 (showing after dry the processing).
Test 1b
The product water content that imports is 39% weight ratio.Top disc is static, and bottom disc is with 3545 rev/mins rotating speed rotation.After (1x) handled for the first time, it was 22% weight ratio that product still has water content.After after-treatment, water content is 14.9% weight ratio.After three processing, water content is 6.0% weight ratio.After four processing, water content is 0.3% weight ratio.Electron micrograph shows that product is without damaging (seeing Figure 19 and Figure 21, respectively before drying is handled and afterwards).
Test 1c
The product that imports is the tetradecane (tetradecane) that contains 24.3% weight ratio.Top disc is rotated with 3375 rev/mins rotating speed.Its bottom disc rotates with 3345 rev/mins rotating speed.
After handling for the first time, the residual liquid content of product is 21.0% weight ratio.
After after-treatment, the residual liquid content of product is 18.4% weight ratio.
After three processing, the residual liquid content of product is 15.7% weight ratio.
After the 4th processing, the residual liquid content of product is 13.5% weight ratio.
Test 1d
Permethyl 99A (isododeeane) top disc that the product that imports contains 25% weight ratio is with 3375 rev/mins rotating speed rotation, and bottom disc is with 3545 rev/mins rotating speed rotation.
After handling for the first time, still contain the Permethyl 99A of 2.9% weight ratio in the powder.
Test 2
The particle size distribution situation that the particle of processing to be dried has as shown in figure 16, X wherein, the represented content of Y and Z axle is with identical shown in Figure 14.Size of main body is 350 microns.Has internal microcellular structure on the particle as shown in figure 17.The product of sending into contains the Permethyl 99A (five methylheptane) of 77.6% weight ratio.After handling for the first time, still contain the liquid of 1.1% weight ratio in the product.
Example 2
Be provided with fan in the device, as shown in Figure 7 with straight blade.Liquid is discharged away through the material of blade.Fan is to rotate under 400 rev/mins of conditions at rotating speed.
Pending product is identical with example 1, but water content is 39% weight ratio, and sends into the inside of each blade.Through after the single treatment, stay water content in the product of blade exterior and be reduced to 4.1% weight ratio.
Example 3
This device is by a circle, and crooked roller track is formed, and has a blade to rotate (see figure 10) in track.
The diameter of cylinder track is 260 millimeters.
The diameter of blade is 250 millimeters.
The rotating speed of blade S is 3750 rev/mins.
The cylinder track is to be made by sintering metal.
The initial water content of product is 45% by weight.
After treated 15 seconds, its residual moisture content is 30% by weight.
After treated 30 seconds, its residual moisture content is 12.5% by weight.
After treated 60 seconds, its residual moisture content is 0.5% by weight.

Claims (14)

1, a kind of method is used for solid particle to the porous that contains liquid and carries out drying and handle, it is characterized in that: each particle is all produced single rotation, the affinity that the angular speed of this rotation will make effect power on the liquid on the inside that acts on particle of its generation and surface or various power will surpass the liquid particles on granule interior and surface, separate simultaneously by the liquid of getting rid of on the particle, perhaps in next process, separate.
2, the method for claim 1, it is characterized in that: described particle is to import between two planes that shape is identical basically, this two plane with the direction direction at an angle of movement of particles on have a relative velocity, get rid of and take away by one of them or these two bundle of planes moisture.
3, the method for claim 1, it is characterized in that: described particle is to send into by the device of the fan-shaped of the rotation of a band blade, the geometry of this blade should make particle can produce rotation through after the blade surface, and makes the moisture that will remove throw away and get rid of through the surface of blade.
4, the method for claim 1 is characterized in that: described particle all produces the rotation on the concave surface of curved surface.
5, as the method for described any one requirement of claim 1 to 4, it is characterized in that: have one gas stream to be used to carry particle.
6, as the method for described any one requirement of claim 1 to 5, it is characterized in that: described particle and in a sorter, separate by the moisture of removing on the particle.
7, being used to handle a kind of device of dusty material, is by one first and second surface composition, and this two surface is the identical and arranged parallel of shape, and mutual spacing also has from very near
-a kind of device is used to drive this two surface makes it have a relative velocity difference.
-a kind of device is used for dusty material is sent into two gap locations between the surface,
-a kind of device is used for dusty material is removed away by the gap location between two surfaces,
-a kind of device is used for the fluid discharge of being separated by dusty material is gone out.
8, device as claimed in claim 7 is characterized in that: described surface all is columniform, and dusty material is emitting near other end place sending near one end place.
9, device as claimed in claim 7 is characterized in that: described surface all is conical, and dusty material is emitting near the bottom sending near the top.
10, device as claimed in claim 7 is characterized in that: described surface all is circular, and the place of keeping to the side discharges dusty material sending near the centre.
11, device as claimed in claim 7 is characterized in that: described two surfaces have at least one to be what to cover with porous material, and this surface and be arranged on the one side that is not facing to the gap between two surfaces is connected in order to the conduit of discharge liquid.
12, method as claimed in claim 11 is characterized in that: keep a negative pressure in described discharge tube.
13, as the device of any one requirement as described in the claim 7 to 12, it is characterized in that: the filter screen of an eye with holes is placed on the position on the opposite of the position of discharging dusty material the gap between two surfaces.
14, a kind of device basically as shown in each accompanying drawing and as described in.
CN198787105185A 1986-07-24 1987-07-23 The drying means of solid, porous particles and device Pending CN87105185A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL8601923 1986-07-24
NL8601923A NL8601923A (en) 1986-07-24 1986-07-24 METHOD FOR DRYING FIXED, POROUS PARTICLES BY INDIVIDUAL ROTATION OF THE PARTICLES.
NL8701108A NL8701108A (en) 1986-07-24 1987-05-11 DEVICE FOR TREATING POWDER MATERIAL.
NL8701108 1987-05-11

Publications (1)

Publication Number Publication Date
CN87105185A true CN87105185A (en) 1988-02-10

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Application Number Title Priority Date Filing Date
CN198787105185A Pending CN87105185A (en) 1986-07-24 1987-07-23 The drying means of solid, porous particles and device

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EP (1) EP0254372A1 (en)
KR (1) KR880001334A (en)
CN (1) CN87105185A (en)
AU (1) AU7605487A (en)
NL (1) NL8701108A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4133642C1 (en) * 1991-10-11 1993-02-25 Alb. Klein Gmbh & Co. Kg, 5241 Niederfischbach, De
NL1022588C2 (en) * 2003-02-05 2004-08-06 Schoot Engineering B V V D Method and device for solidifying a pumpable mass.
CN104713314A (en) * 2015-03-12 2015-06-17 云南省农业机械研究所 Self-unloading centrifugal dehydrator

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE785667A (en) * 1971-07-03 1973-01-02 Stamicarbon METHOD AND DEVICE FOR REMOVING LIQUID FROM WET OR WET PARTICLES
DE3003206A1 (en) * 1980-01-30 1981-08-06 Krauss-Maffei AG, 8000 München DEVICE FOR CLASSIFYING SOLIDS FROM SUSPENSIONS

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KR880001334A (en) 1988-04-22
EP0254372A1 (en) 1988-01-27
AU7605487A (en) 1988-01-28

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