CN110115959A - The liquid phase jet stream pelletizing method and system of solid matter - Google Patents
The liquid phase jet stream pelletizing method and system of solid matter Download PDFInfo
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- CN110115959A CN110115959A CN201810110827.6A CN201810110827A CN110115959A CN 110115959 A CN110115959 A CN 110115959A CN 201810110827 A CN201810110827 A CN 201810110827A CN 110115959 A CN110115959 A CN 110115959A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
- B01J2/06—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a liquid medium
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Abstract
The present embodiments relate to industrial circles, disclose the liquid phase jet stream pelletizing method and device of a kind of solid matter.The present invention provides a kind of liquid phase jet stream pelletizing methods of solid matter, molten state substance is introduced into fluid working substance with preset vol flow velocity from entry port and forms jet stream, jet stream forms droplet cluster in fluid working substance, and the drop in droplet cluster forms spherical drop in fluid working substance；Wherein, preset vol flow velocity is greater than or equal to the first preset threshold；Wherein, fluid working substance meets preset condition, and preset condition includes: fluid working substance and molten state substance is immiscible, density of fluid working substance and the density of molten state substance are unequal；Wherein, the dynamic viscosity of fluid working substance and dynamic viscosity of the molten state substance in the region where entry port are respectively less than the second preset threshold.The liquid phase jet stream pelletizing method of the solid matter is suitable for multiple material field, and the jet stream pelletizing method application Portable safety, forming degree height, uniform particle sizes, balling-up speed is fast, production capacity is high.
Description
Technical field
The present embodiments relate to industrial circles, in particular to the liquid phase jet stream pelletizing method and system of solid matter.
Background technique
It in several Material Fields, needs to carry out the forming of solid material, is needed in some cases by solid material system
At spherical shape, to meet various application demands and/or improve the mobility etc. of solid material.
In metal material field, need to carry out processing balling-up to some metal materials: such as steel ball, iron ball bearing class roll
Pearl mostly uses greatly mold compacting to combine the balling technique of lathe polishing；The manufacture of pen ball of ball pen is similar to bearing ball, main
If forging into small cube using ball spinning forming technique with steel wire punching or forming, regrinding into ball, need dedicated rolling
Pearl die socket, its precision are related with spinning force, revolving speed.
In field of inorganic nonmetallic material, currently used alumina balls manufacturing process include rolling forming process, etc. static pressure
Forming process, spray granulation etc..Wherein roll forming process and hydrostatic pressing method be generally used to prepare conventional catalyst carrier and/
Or inert ceramic balls；The partial size of the alumina balls of spray granulation preparation is generally less than 200 μm；In addition, for some nanometers, micron
The inorganic microsphere material of grade is sprayed there are also flame balling-up, high-temperature fusion and the preparation processes such as chemical precipitation, collosol and gel.
In organic material field, plastic processing generallys use the plastic forming methods such as blow molding, injection, extrusion；Baton round
Production is using injection molding or the method being blow molded, including base, photosphere, cleaning, fine grinding, the series of processes such as polishing.
Wax material balling-up generallys use mist projection granulating, and the little particle wax ball product of 1mm is less than mainly for the production of size.Spray
Mist granulation is to spray after melting solid wax from atomizer, forms small wax ball, and cooling heavy in the atmosphere of flowing
Drop.This granulation mode the high requirements on the equipment, operation/maintenance cost is big, and is usually to be produced in air system,
There are dust and hidden peril of explosion.Another pelletizing method is that aqueous phase droplets are granulated, using the insoluble of wax and water, by molten state
Solid wax is slowly introducing in water from discharge end, forms drop in port using the surface tension of wax, subsequent drop is detached from discharging
Mouth floats in water to be cooled down, and the wax ball product of certain size is obtained.Wax ball particle made from this mode is regular, good sphericity,
Equipment and operation relative ease safety, but aqueous phase droplets are granulated still in the starting stage at present, and production capacity is also by the limit of technical principle
System, not yet can large-scale application.
Inventor has found that there are the following problems in existing material balling-up technology: for metal, inorganic non-metallic and organic
Material etc., it is slower using polishing process ball speed, and mold, grinding tool are required very high；For inorganic non-metallic and organic material
Material etc., is limited, and there are some potential safety problemss using the sphere diameter that spray granulation obtains；For wax material, water
Although security risk is not present in phase drop comminution granulation, its large-scale application is influenced by being granulated speed and being limited.
Summary of the invention
The liquid phase jet stream pelletizing method and system for being designed to provide a kind of solid matter of embodiment of the present invention.It is applicable in
In multiple material field, the pelletizing method application Portable safety, forming degree height, uniform particle sizes, balling-up speed is fast, production capacity is high.
In order to solve the above technical problems, embodiments of the present invention provide a kind of liquid phase jet stream balling-up side of solid matter
Method, comprising the following steps:
Molten state substance is introduced into fluid working substance with preset vol flow velocity from entry port and forms jet stream, jet stream is in fluid
Droplet cluster is formed in working medium, the drop in droplet cluster forms spherical drop in fluid working substance；
Wherein, preset vol flow velocity is greater than or equal to the first preset threshold；
Wherein, fluid working substance meets preset condition, and preset condition includes: that fluid working substance and molten state substance are immiscible, flows
The density of body working medium and the density of molten state substance are unequal；
Wherein, dynamic viscosity of the dynamic viscosity of fluid working substance with molten state substance in the region where entry port is small
In the second preset threshold.
Embodiments of the present invention additionally provide a kind of liquid phase jet stream balling-up system of solid matter, using above-mentioned solid-state
The liquid phase jet stream pelletizing method of substance, comprising: the entry port of molten state substance and the forming tower comprising fluid working substance；
The entry port of molten state substance is dipped in fluid working substance, for by molten state substance with preset vol flow velocity from entering
It penetrates port and is introduced into fluid working substance and form jet stream, jet stream forms droplet cluster in fluid working substance, and the drop in droplet cluster is in fluid
Spherical drop is formed in working medium；
Wherein, preset vol flow velocity is greater than or equal to the first preset threshold；
Wherein, fluid working substance meets preset condition, and preset condition includes: fluid working substance and the molten state substance not phase
Molten, fluid working substance density and the density of molten state substance are unequal；
Wherein, dynamic viscosity of the dynamic viscosity of fluid working substance with molten state substance in the region where entry port is small
In the second preset threshold.
Embodiment of the present invention in terms of existing technologies, provides one kind and overturns aqueous phase droplets prilling process technology original
Then, the molten state substance balling-up new method for overcoming its technology to limit to, by molten state substance with preset vol flow velocity from entry port
It is introduced into fluid working substance and forms jet stream, jet stream forms droplet cluster in fluid working substance, and the drop in droplet cluster is in fluid working substance
Form spherical drop；Wherein, preset vol flow velocity is greater than or equal to the first preset threshold to form jet stream；Wherein, fluid working substance
It is immiscible with molten state substance, allow molten state droplets of substance to form spherical drop under the action of interfacial tension；Fluid
The density of working medium and the density of molten state substance are unequal, allow spherical drop resultant force suffered by it under the action of movement from
And leave the region where the entry port of molten state substance；The dynamic viscosity and molten state substance of fluid working substance are in molten state object
The dynamic viscosity in the region where the entry port of matter is respectively less than the second preset threshold, so that molten state substance is in entry port institute
Region formed jet stream can diverge to droplet cluster, by molten state substance be greater than or equal to the first preset threshold default body
Product flow velocity is introduced into the fluid working substance for meeting above-mentioned condition, and molten state substance jet stream, which dissipates, to form droplet cluster, the liquid in droplet cluster
Drop forms spherical drop in fluid working substance.The jet stream pelletizing method be suitable for multiple material field, and application Portable safety, at
Shape degree height, uniform particle sizes, balling-up speed is fast, production capacity is high.
In addition, the relationship at bulb diameter of preset vol flow velocity and drop are as follows: when control preset vol flow velocity is greater than or waits
When the first preset threshold, 3 times of the internal diameter that entry port is equivalent at bulb diameter of drop.Preset vol flow velocity and drop
At bulb diameter, there are certain relationships, by controlling the preset vol flow velocity of molten state substance, available diameter and incidence end
3 times of comparable spherical drops of the internal diameter of mouth.
In addition, the relationship at bulb diameter of preset vol flow velocity and drop are as follows: when control preset vol flow velocity is greater than or waits
When the critical speed of molten state substance, droplet cluster includes two kinds of drops；One of drop is equivalent to incidence at bulb diameter
3 times of the internal diameter of port；Another internal diameter that entry port is equivalent at bulb diameter of drop；Wherein, critical speed is greater than and escapes
Ease speed.Preset vol flow velocity and drop at bulb diameter, there is also another relationships, pass through the pre- of control molten state substance
If volume flow rate, the spherical drop of available two kinds of diameters, and one of drop is equivalent to entry port at bulb diameter
3 times of internal diameter；Another internal diameter that entry port is equivalent at bulb diameter of drop.The internal diameter of the entry port can be
Equivalent internal diameter.
In addition, entry port is single port or matrix ports.User can select according to the quantity of the sphere of required manufacture
It selects using single port or matrix ports, improves the balling-up rate of molten state substance.
In addition, entry port is rounded.Provide a kind of implementation of entry port.
In addition, molten state substance is wax, fluid working substance is water.Provide the possibility of a kind of molten state substance and fluid working substance
Property.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the specific flow chart of the liquid phase jet stream pelletizing method of the solid matter of first embodiment according to the present invention；
Fig. 2 is that wax makes with water test in the liquid phase jet stream balling-up system of the solid matter of second embodiment according to the present invention
With the effect diagram of single port；
Fig. 3 is that wax makes with water test in the liquid phase jet stream balling-up system of the solid matter of second embodiment according to the present invention
With the effect diagram of 3 × 3 matrix ports.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, in order to make the reader understand this application better, many technical details are proposed.But even if without these technical details
And various changes and modifications based on the following respective embodiments, the application technical solution claimed also may be implemented.
The first embodiment of the present invention is related to a kind of liquid phase jet stream pelletizing methods of solid matter.The core of present embodiment
The heart is as shown in Figure 1.In a step 101, molten state substance is provided；In a step 102, by molten state substance with preset vol flow velocity
It is introduced into fluid working substance from entry port and forms jet stream, jet stream forms droplet cluster in fluid working substance, and the drop in droplet cluster exists
Spherical drop is formed in fluid working substance.Wherein, preset vol flow velocity is greater than or equal to the first preset threshold；Wherein, fluid working substance
Meet preset condition, preset condition includes: fluid working substance and molten state substance is immiscible, density of fluid working substance and molten state object
The density of matter is unequal；Wherein, power of the dynamic viscosity of fluid working substance with molten state substance in the region where entry port
Viscosity is respectively less than the second preset threshold.
The liquid phase jet stream pelletizing method of present embodiment is suitable for multiple material field, and applies Portable safety, forming degree
Height, uniform particle sizes, balling-up speed is fast, production capacity is high, is specifically described below.
In practical applications, the working principle of aqueous phase droplets prilling process is as follows: molten state substance is introduced to therewith not
When in the fluid working substance to mix, if the dynamic viscosity of molten state substance and fluid working substance is smaller (i.e. good fluidity), due to
The effect of interfacial tension between fluid working substance and molten state substance, molten state substance can be formed in its entry port gradually grows up
The drop for being attached to entry port close to spherical shape；In gravitational field, which will be by buoyancy.By Archimedes
Principle, the sum of buoyancy and gravity suffered by non-uniform object, calls resulting net force in the following text, meets following formula:
In above-mentioned formula (1),For the resulting net force that molten state droplets of substance is subject in fluid working substance, V0For molten state substance
Volume, ρ0For molten state material density, ρωFor fluid working substance density,For acceleration of gravity.
That is, in gravitational field, object suffered resulting net force and object own vol and object and fluid work in fluid working substance
Density contrast between matter is directly proportional, and if object density be greater than fluid working substance density, resulting net force and gravity suffered by object are in the same direction；If object
Volume density is less than fluid density, then resulting net force and gravity reversal suffered by object.Therefore, when droplet size is gradually increased so that its institute
The resulting net force being subject to be enough to overcome viscous force between the drop and incidence end molten state substance and drop and entry port material/
When viscous force between end face, drop will be disengaged from entry port, whole to immerse fluid working substance, and move along resulting net force direction.At this
In motion process, drop tends to ideal sphere under the interfacial tension effect between fluid working substance and molten state substance.If flowing
The temperature gradient to successively decrease along liquid drop movement direction is equipped in body working medium, then spherical drop will be gradually cooling and solid during the motion
It is melted into spherical solid.This prilling process has many advantages, such as that finished product sphericity is high, and particle diameter distribution is narrow.
In addition, fluid working substance can generate resistance to moving object when object moves in fluid working substance.If object and fluid
The speed of related movement of working medium is not high, then fluid working substance is about directly proportional to speed of related movement to the resistance of object；If object
It is higher with the speed of related movement of fluid working substance, then fluid working substance to the resistance of object about with speed of related movement square at
Direct ratio, etc..Therefore, if movement of the object in fluid working substance is only driven by above-mentioned resulting net force, limit velocity is just certainly existed,
Claim terminal velocity, i.e., the object when fluid working substance that the resulting net force suffered by the object is subject to it cancels out each other to the resistance of the object of which movement
Movement velocity.If object is only driven by resulting net force, then object relative to the movement velocity of fluid working substance be only capable of infinite tendency but
Terminal velocity can not be surmounted.
Therefore, in the aqueous phase droplets granulation process of practical application, molten state substance is full in the volume flow rate of entry port
Foot:
In formula, SOVolume flow rate for molten state substance in incidence end exit, VOIt is exported for molten state substance in incidence end
The outlet linear velocity at place, AOFor the cross-sectional area of incidence end exit molten state substance, SESpherical drop for molten state substance exists
Escape velocity near incidence end, R are the radius of a ball of spherical drop, VTThe terminal velocity for being spherical drop in fluid working substance.
Above-mentioned expression formula (2) shows: molten state substance should enter in the volume flow rate of its incidence end much smaller than spherical drop
The escape velocity near end is penetrated, the necessary condition of drop forming otherwise will be destroyed, molten state substance is caused to form rodlike, " sugared calabash
The shapes such as reed string ".This also causes the balling-up speed of aqueous phase droplets prilling process and granulation ability to be restricted.
If molten state substance incidence end exit cross-section shape is taken as circle, then above-mentioned expression formula (2) can be reduced to,
In formula, d is incidence end exit inside diameter；D is the diameter of spherical drop.
The resulting spherical drop diameter D of aqueous phase droplets prilling process depend on molten state substance viscosity (viscosity gets over high ball
Diameter is bigger), the contact of volume flow rate (the higher sphere diameter of flow velocity is smaller), molten state substance and entry port material of molten state substance
Angle (the smaller sphere diameter of contact angle is bigger), the area (with contact angle strong correlation) of entry port, molten state substance and fluid working substance
The factors such as density contrast (it is smaller that density contrast gets over large ball diameter).
And the liquid phase jet stream pelletizing method of the solid matter in present embodiment, it provides one kind and overturns above-mentioned aqueous phase droplets
Prilling process engineering philosophy, the molten state substance balling-up new method for overcoming its technology to limit to, by molten state substance with preset vol
Flow velocity is introduced into fluid working substance from entry port and forms jet stream, and jet stream dissipates in fluid working substance, formation droplet cluster, in droplet cluster
Drop interfacial tension effect under form spherical drop.
Wherein, the first preset threshold is specially that spherical drop is escaped in the region where the entry port of the molten state substance
Ease speed.Preset vol flow velocity SOIt indicates, escape velocity SEIt indicates, SOMore than or equal to the first preset threshold, i.e. SO≥
SE.Preset vol flow velocity makes the molten state substance form continuous flow, referred to as jet stream in its entry port.Wherein, escape speed
Spend SEIt can be obtained by following calculation formula:
SE=(4 π R2·VT)/3 (4)
In above-mentioned formula (4), R is the radius of spherical drop, VTIt is the glomerate molten state substance of shape in fluid working substance
Terminal velocity (terminal velocity is that the fluid working substance that the resulting net force suffered by the object is subject to it mutually supports the resistance of the object of which movement
Movement velocity of the object relative to fluid working substance when disappearing).
The fluid working substance meet preset condition include:
Condition one: fluid working substance and molten state substance it is immiscible (intersolubility sufficiently it is small so that respectively physical property substantially not
Become) so that there are interfaces between molten state substance and fluid working substance, thus there are interfacial tensions.Jet stream is transported in fluid working substance
It is dynamic, and cause jet stream to dissipate because of fluid working substance, droplet cluster is formed, drop tends to be spherical under interfacial tension effect, to be formed
Spherical drop.
Condition two: the density of fluid working substance and the density of molten state substance are unequal, allow droplet cluster suffered by it
The region where the entry port of the molten state substance is left under the driving of resulting net force.
In addition, the dynamic viscosity of the dynamic viscosity of fluid working substance and the molten state substance in the region where entry port
Respectively less than the second preset threshold, so that fluid working substance and the molten state substance in incidence end and its neighborhood all have good stream
Dynamic property, the jet stream that molten state substance can be made to be formed in entry port can dissipate in fluid working substance forms droplet cluster and because of interface
Power and tend to be spherical.
In the present embodiment, the second preset threshold can be set to 10 centipoises.It in practical applications, specifically can basis
The second preset threshold is arranged in the diverging of molten state substance/balling-up situation, and the present invention do not limit the value of the second preset threshold
Fixed, any so that the molten state substance can form jet stream in its entry port, jet stream can dissipate and drop has sufficient time relaxation
The setting of balling-up all belongs to the scope of protection of the present invention.
The liquid phase jet stream pelletizing method of the solid matter of present embodiment is suitable for multiple Material Fields, it is only necessary to by molten state
Substance is introduced into the fluid working substance for meeting above-mentioned condition with preset vol flow velocity, and application is convenient, and forming degree is high, partial size is equal
It is even, and the preset vol flow velocity of the molten state substance is greater than or equal to the first preset threshold, therefore, balling-up speed is fast, production capacity is high.
In addition, the drop in droplet cluster can form globular solids in fluid working substance.At this point, above-mentioned preset condition is also wrapped
Include: the temperature of fluid working substance is successively decreased from entry port to preset direction；Wherein, preset direction meets the following conditions: in molten state
When the density of substance is greater than the density of fluid working substance, preset direction is identical as gravity direction；It is less than in the density of molten state substance
When the density of fluid working substance, preset direction is opposite with gravity direction.Provided with one from the molten state substance entry port, to this
The temperature field that shape glomerate molten state motion of matter direction is successively decreased, so that spherical drop is gradually cooling solidifying during the motion
Gu forming globular solids.
In addition, the relationship at bulb diameter of preset vol flow velocity and drop are as follows: when control preset vol flow velocity is greater than or waits
When the first preset threshold, 3 times of the internal diameter that entry port is equivalent at bulb diameter of drop.As preset vol speed flow velocity SOGreatly
When the first preset threshold, i.e. SO≥SE, within the scope of sizable volume flow rate, jet stream dissipate resulting drop at
Bulb diameter D is about 3 times of the internal diameter d of entry port, and is distributed narrow.The spherical drop diameter and incidence end material, property, shape
Shape etc. is unrelated, weak related (below critical speed) to preset vol flow velocity, weak related to molten state substance viscosity.Drop herein
3 times of the internal diameter of entry port are equivalent at bulb diameter, indicate the drop is equal or approximately equal to the incidence at bulb diameter
3 times of the internal diameter of port.It can be expressed as the absolute value of 3 times of the difference at bulb diameter and the internal diameter of entry port of drop
Less than third predetermined threshold value, which can be set to 0.4 millimeter, and in practical applications, diameter is less than
For 1.0 millimeters of drop ball, the absolute value of 3 times of difference of the internal diameter of the diameter and incidence end of the spherical drop of formation is more
It is small.It is worth noting that in practical applications, the internal diameter of incidence end may be equivalent internal diameter.
In addition, the relationship at bulb diameter of preset vol flow velocity and drop are as follows: when control preset vol flow velocity is greater than or waits
When the critical speed of molten state substance, droplet cluster includes two kinds of drops, and one of drop is equivalent to incidence at bulb diameter
3 times of the internal diameter of port；Another internal diameter that entry port is equivalent at bulb diameter of drop；Wherein, the critical speed is big
In the escape velocity.Specifically, to preset vol flow velocity SO, there are critical speed SC.Critical speed is greater than molten state substance
Spherical drop the region where entry port escape velocity SE, i.e. SC> SE.If preset vol flow velocity SOIt is greater than or equal to
When the critical speed, i.e. SO≥SC, it includes two kinds of drops, one of drop that molten state substance jet stream, which dissipates the droplet cluster to be formed,
Be about 3 times of incidence end internal diameter d at bulb diameter D, and be distributed narrow；Another drop at bulb diameter D2With entry port
Internal diameter d is suitable, and is distributed narrow.Above two drop it is unrelated with incidence end material, property, shape etc. at bulb diameter, and it is pre-
If volume flow rate is weak related (more than critical speed), weak related to molten state substance viscosity.
3 times of the internal diameter that entry port is equivalent at bulb diameter of drop herein, indicate being equal at bulb diameter for the drop
Or be nearly equal to the entry port internal diameter or 3 times of equivalent internal diameter；Drop is equivalent in entry port at bulb diameter
Diameter indicates the internal diameter or equivalent internal diameter that the entry port is equal or approximately equal at bulb diameter of the drop.It can indicate
For drop 3 times of the difference at bulb diameter and the internal diameter of entry port absolute value be less than third predetermined threshold value, drop at
The difference of the internal diameter of bulb diameter and entry port is less than third predetermined threshold value.The third predetermined threshold value can be set to 0.4 millimeter,
And in practical applications, for drop ball of the diameter less than 1.0 millimeters, the diameter of the spherical drop of formation and the incidence end
The difference of 3 times (or 1 times) of the internal diameter of mouth is smaller.The specific value of above-mentioned critical speed can be obtained by experiment, different
Critical speed of the molten state substance in different fluid working medium be not identical.
Compared with prior art, present embodiments provide for one kind to overturn aqueous phase droplets prilling process engineering philosophy, overcomes
Molten state substance is introduced fluid from entry port with preset vol flow velocity by the molten state substance balling-up new method of its technology limitation
Jet stream is formed in working medium, jet stream forms droplet cluster in fluid working substance, and the drop in droplet cluster forms spherical in fluid working substance
Drop；Wherein, preset vol flow velocity is greater than or equal to the first preset threshold；Wherein, fluid working substance and molten state substance are immiscible,
Molten state droplets of substance is allowed to form spherical drop under the action of interfacial tension；The density and molten state object of fluid working substance
The density of matter is unequal, allow drop in droplet cluster resultant force suffered by it under the action of movement to leave molten state object
Region where the entry port of matter；The entry port institute of the dynamic viscosity of fluid working substance and molten state substance in molten state substance
The dynamic viscosity in region be respectively less than the second preset threshold so that molten state substance was formed in the region where entry port
Jet stream can dissipate to form droplet cluster, and molten state substance is introduced with the preset vol flow velocity for being greater than or equal to the first preset threshold
Meet in the fluid working substance of above-mentioned condition, molten state substance jet stream dissipates to form droplet cluster, and the drop in droplet cluster is in fluid work
Spherical drop is formed in matter.The jet stream pelletizing method is suitable for multiple material field, and application Portable safety, forming degree are high, grain
Diameter is uniformly, balling-up speed is fast, production capacity is high.
Second embodiment of the invention is related to a kind of liquid phase jet stream balling-up system of solid matter.Using above-mentioned solid
The liquid phase jet stream pelletizing method of matter, comprising: the entry port of molten state substance and the forming tower comprising fluid working substance；Molten state object
The entry port of matter is dipped in fluid working substance, for molten state substance to be introduced fluid work from entry port with preset vol flow velocity
Jet stream is formed in matter, jet stream forms droplet cluster in fluid working substance, and the drop in droplet cluster forms spherical liquid in fluid working substance
Drop；Wherein, preset vol flow velocity is greater than or equal to the first preset threshold；Wherein, fluid working substance meets preset condition, preset condition
It include: fluid working substance and molten state substance is immiscible, density of fluid working substance and the density of molten state substance are unequal；Wherein,
The dynamic viscosity and dynamic viscosity of the molten state substance in the region where entry port of fluid working substance are respectively less than the second default threshold
Value.
Specifically, molten state substance is introduced into the fluid working substance for meeting above-mentioned preset condition with preset vol flow velocity,
So that the molten state substance forms continuous flow in its entry port, i.e. jet stream, jet stream forms droplet cluster, liquid in the fluid working substance
Drop in drop group forms spherical drop in the fluid working substance.
Wherein, the first preset threshold is specially escape velocity of the spherical drop in the region where entry port.This is default
Volume flow rate SOIt indicates, escape velocity SEIt indicates, SOMore than or equal to the first preset threshold.That is SO≥SE.Escape speed herein
The calculation method of degree is identical with first embodiment, and details are not described herein.
The preset condition that the fluid working substance meets specifically includes:
Condition one: fluid working substance and molten state substance it is immiscible (intersolubility sufficiently it is small so that respectively physical property substantially not
Become) so that there are interfaces between molten state substance and fluid working substance, thus there are interfacial tensions.Jet stream is transported in fluid working substance
It is dynamic, and cause jet stream to dissipate because of fluid working substance, droplet cluster is formed, drop tends to be spherical under interfacial tension effect, to be formed
Spherical drop.
Condition two: the density of fluid working substance and the density of molten state substance are unequal, allow droplet cluster suffered by it
The region where the entry port of the molten state substance is left under the driving of resulting net force.
In addition, the dynamic viscosity of the dynamic viscosity of fluid working substance and the molten state substance in the region where entry port
Respectively less than the second preset threshold, so that fluid working substance and the molten state substance in incidence end and its neighborhood all have good stream
Dynamic property, the jet stream that molten state substance can be made to be formed in entry port can dissipate in fluid working substance forms droplet cluster and because of interface
Power and tend to be spherical.
In the present embodiment, the second preset threshold can be set to 10 centipoises.It in practical applications, specifically can basis
The second preset threshold is arranged in the diverging of molten state substance/balling-up situation, and the present invention do not limit the value of the second preset threshold
Fixed, any so that the molten state substance can form jet stream in its entry port, jet stream can dissipate and drop has sufficient time relaxation
The setting of balling-up all belongs to the scope of protection of the present invention.
In addition, spherical drop forms globular solids in fluid working substance；Preset condition further include: the temperature of fluid working substance is certainly
Entry port successively decreases to preset direction；Wherein, preset direction meets the following conditions: being greater than fluid work in the density of molten state substance
When the density of matter, preset direction is identical as gravity direction；When the density of molten state substance is less than the density of fluid working substance, preset
Direction is opposite with gravity direction.Provided with one from the molten state substance entry port, to the glomerate molten state substance of the shape
The temperature field that the direction of motion is successively decreased, so that spherical drop gradually cooled and solidified during the motion, forms globular solids.
Further, entry port is rounded.Due to the diameter and the incidence end of the spherical drop that molten state substance is formed
The internal diameter of mouth is related, and the diameter of spherical drop is equivalent to the internal diameter of entry port or the diameter of spherical drop is equivalent to incidence
3 times of the internal diameter of port.Therefore, entry port is set as circle, is entered convenient for user according to the diameter sets itself of required sphere
The internal diameter of port is penetrated, it is easy to use.
Further, entry port is single port or matrix ports.As shown in figure 3, matrix ports are by 3 × 3 internal diameters
Identical single port composition, using the matrix ports, the balling-up speed of molten state substance is about the 9 of single port balling-up speed
Times, substantially increase the efficiency of balling-up.In practical applications, the port number for being included to matrix ports is not defined,
User can set according to self-demand, any setting that balling-up efficiency is improved by increasing port number, in this reality
It applies within the protection scope of mode.
Further, molten state substance is wax, fluid working substance is water.In practical applications, molten state substance can for wax,
Fluid working substance can be water.But in practical applications, molten state substance can be material in a molten state needed for user,
User can select the fluid working substance for meeting above-mentioned condition according to the ball material of required formation.
In the present embodiment, the second preset threshold can be set to 10 centipoises.It, specifically can be according to molten in practical application
Melt diverging/balling-up situation of state substance to be arranged the second preset threshold, the present invention to the value of the second preset threshold and without limitation,
It is any so that the molten state substance can its entry port formed jet stream, jet stream can dissipate and drop has sufficient time relaxation balling-up
Setting all belong to the scope of protection of the present invention.
Provided solid matter liquid phase jet stream pelletizing method and system in order to which the present invention will be described in detail, below with wax/water
System is as test material, wherein wax is the solid matter of required balling-up, water is fluid working substance, special to technology of the invention
Point and advantage are specifically illustrated.Technical characteristic provided by the present invention and embodiment include and are not limited only to following tests
Mentioned in particular technique parameter and data.
Wherein, escape velocity S of the various diameter spherical wax grains in 90 DEG C of waterEIt is shown in Table 1.
Table 1: terminal velocity of the various diameter spherical wax grains in 90 DEG C of water
| Wax bulb diameter (mm) | Terminal velocity (m/s) | Wax bulb diameter (mm) | Terminal velocity (m/s) |
| 0.2 | 0.007 | 2 | 0.035 |
| 0.5 | 0.014 | 3 | 0.045 |
| 0.6 | 0.015 | 4 | 0.05 |
| 1.0 | 0.02 | 4.5 | 0.06 |
| 1.5 | 0.03 | 5 | 0.06 |
Following comparative example 1 and comparative example 2 are that the test data set volume flow rate much smaller than escape velocity when and test are existing
As.
Comparative example 1: use fusing point for 70 DEG C of synthetic wax, water is working medium.Incidence end nozzle is circle, nozzle inside diameter d=
0.8mm, outer diameter D e=1.6mm, entry port material are stainless steel, and 95 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to
6.5mm2/ s, neighbouring 95 DEG C of the Temperature of Working in incidence end exit, volume flow rate of the molten wax in incidence end exit: 500ml/h,
Wax ball overflows from entry port by ground and rises in water, and obtaining wax ball particle diameter is 4mm to 5mm.
Comparative example 2: use fusing point for 70 DEG C of synthetic wax, water is working medium.Incidence end nozzle is circle, nozzle inside diameter d=
0.2mm, outer diameter D e=0.4mm, entry port material is quartz glass, outer wall is polyimide coating, 95 DEG C of incidence end temperature,
Molten wax kinematic viscosity is approximately equal to 6.5mm2/ s, nearby 95 DEG C of Temperature of Working, molten wax are exported in incidence end in incidence end exit
The volume flow rate at place: 90ml/h, wax ball overflow from entry port by ground and rise in water, obtain wax ball particle diameter about etc.
In 1.5mm.
It can be seen that being the test carried out so that volume flow rate is much smaller than escape velocity as an example, obtaining in above-mentioned comparative example
There is no fixed relationships for wax ball particle diameter and entry port internal diameter, and only obtain a kind of wax ball particle of diameter.And it is following
Test one is in the liquid phase jet stream balling-up system of this programme solid matter to the solid matter in this programme to test 15
The specific test of liquid phase jet stream pelletizing method, the wax ball that obtained wax bulb diameter is equivalent to the internal diameter of entry port or obtains
Diameter is equivalent to 3 times of the internal diameter of entry port.15 groups of data below can sufficiently confirm the feasibility of application scheme.
Test one: using fusing point for 70 DEG C of synthetic wax, and incidence end nozzle is round, the internal diameter d=1mm of entry port,
95 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 6.5mm2/ s, neighbouring 95 DEG C of the Temperature of Working in incidence end exit, melting
Volume flow rate of the wax in incidence end exit: 1800ml/h, incidence end exit form jet stream, and jet stream segment length is approximately equal to 1cm,
It obtains wax ball particle diameter and is approximately equal to 3mm.
Test two: using fusing point for 70 DEG C of synthetic wax, and incidence end nozzle is round, the internal diameter d=1mm of entry port,
95 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 6.5mm2/ s, neighbouring 95 DEG C of the Temperature of Working in incidence end exit, melting
Volume flow rate of the wax in incidence end exit: 4000ml/h, incidence end exit form jet stream, and jet stream segment length is approximately equal to 3cm,
It obtains wax ball particle diameter and is approximately equal to 3mm.
Test three: using fusing point for 70 DEG C of synthetic wax, and incidence end nozzle is round, the internal diameter d=1mm of entry port,
95 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 6.5mm2/ s, neighbouring 95 DEG C of the Temperature of Working in incidence end exit, melting
Volume flow rate of the wax in incidence end exit: 5300ml/h, incidence end exit form jet stream, and jet stream segment length is approximately equal to 4cm,
Obtaining wax ball particle diameter is two distributions for being approximately equal to 3mm and being approximately equal to 1mm.
Test four: using fusing point for 70 DEG C of synthetic wax, and incidence end nozzle is round, the internal diameter d=1mm of entry port,
95 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 6.5mm2/ s, neighbouring 95 DEG C of the Temperature of Working in incidence end exit, melting
Volume flow rate of the wax in incidence end exit: 6500ml/h, incidence end exit form jet stream, and jet stream segment length is approximately equal to 5cm,
Obtaining wax ball particle diameter is two distributions for being approximately equal to 3mm and being approximately equal to 1mm.
Test five: use fusing point for 65 DEG C of synthetic wax, incidence end nozzle is circle, the internal diameter d=of entry port
0.2mm, 95 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 6mm2/ s, neighbouring 95 DEG C of the Temperature of Working in incidence end exit,
Volume flow rate of the molten wax in incidence end exit: 150ml/h, incidence end exit form jet stream, and jet stream segment length is approximately equal to
0.5cm obtains wax ball particle diameter and is approximately equal to 0.6mm.
Test six: use fusing point for 65 DEG C of synthetic wax, incidence end nozzle is circle, the internal diameter d=of entry port
0.2mm, 96 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 6mm2/ s, neighbouring 96 DEG C of the Temperature of Working in incidence end exit,
Volume flow rate of the molten wax in incidence end exit: 240ml/h, incidence end exit form jet stream, and jet stream segment length is approximately equal to
1.5cm obtains wax ball particle diameter and is approximately equal to 0.6mm (as shown in Figure 2).
Test seven: use fusing point for 65 DEG C of synthetic wax, incidence end nozzle is circle, the internal diameter d=of entry port
0.2mm, 96 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 6mm2/ s, neighbouring 96 DEG C of the Temperature of Working in incidence end exit,
Volume flow rate of the molten wax in incidence end exit: 300ml/h, incidence end exit form jet stream, and jet stream segment length is approximately equal to
2cm obtains wax ball particle diameter and is approximately equal to 0.6mm and is approximately equal to two distributions of 0.2mm.
Test eight: use fusing point for 65 DEG C of synthetic wax, incidence end nozzle is circle, the internal diameter d=of entry port
0.2mm, 96 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 6mm2/ s, neighbouring 96 DEG C of the Temperature of Working in incidence end exit,
Volume flow rate of the molten wax in incidence end exit: 420ml/h, incidence end exit form jet stream, and jet stream segment length is approximately equal to
3cm obtains wax ball particle diameter and is approximately equal to 0.6mm and is approximately equal to two distributions of 0.2mm.
Test nine: use fusing point for 80 DEG C of synthetic wax, incidence end nozzle is circle, the internal diameter d=of entry port
0.5mm, 97 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 10mm2/ s, the neighbouring Temperature of Working 97 in incidence end exit
DEG C, volume flow rate of the molten wax in incidence end exit: 400ml/h, incidence end exit form jet stream, and jet stream segment length is about etc.
In 1.5cm, obtains wax ball particle diameter and be approximately equal to 1.5mm.
Test ten: use fusing point for 80 DEG C of synthetic wax, incidence end nozzle is circle, the internal diameter d=of entry port
0.5mm, 97 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 10mm2/ s, the neighbouring Temperature of Working 97 in incidence end exit
DEG C, volume flow rate of the molten wax in incidence end exit: 1100ml/h, incidence end exit form jet stream, and jet stream segment length is about
Equal to 3cm, obtains wax ball particle diameter and be approximately equal to 1.5mm.
It tests 11: using fusing point for 80 DEG C of synthetic wax, incidence end nozzle is circle, the internal diameter d=of entry port
0.5mm, 97 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 10mm2/ s, the neighbouring Temperature of Working 97 in incidence end exit
DEG C, volume flow rate of the molten wax in incidence end exit: 1350ml/h, incidence end exit form jet stream, and jet stream segment length is about
Equal to 3cm, obtains wax ball particle diameter and be approximately equal to 1.5mm and be approximately equal to two distributions of 0.5mm.
It tests 12: using fusing point for 80 DEG C of synthetic wax, incidence end nozzle is circle, the internal diameter d=of entry port
0.5mm, 97 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 10mm2/ s, the neighbouring Temperature of Working 97 in incidence end exit
DEG C, volume flow rate of the molten wax in incidence end exit: 1630ml/h, incidence end exit form jet stream, and jet stream segment length is about
Equal to 3.5cm, obtains wax ball particle diameter and be approximately equal to 1.5mm and be approximately equal to two distributions of 0.5mm.
It tests 13: using fusing point for 70 DEG C of synthetic wax, incidence end is 3X3 nozzle array, and nozzle is circle, incidence end
The internal diameter d=1mm of mouth, 95 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 6.5mm2/ s, the neighbouring work in incidence end exit
95 DEG C of matter temperature, total volume flow rate of the molten wax in incidence end exit: 36L/h, each incidence end exit are respectively formed jet stream,
Jet stream segment length is approximately equal to 3cm, obtains wax ball particle diameter and is approximately equal to 3mm.
It tests 14: using fusing point for 70 DEG C of synthetic wax, incidence end is 3X3 nozzle array, and nozzle is circle, incidence end
The internal diameter d=1mm of mouth, 95 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 6.5mm2/ s, the neighbouring work in incidence end exit
95 DEG C of matter temperature, total volume flow rate of the molten wax in incidence end exit: 50L/h, each incidence end exit are respectively formed jet stream,
Jet stream segment length is approximately equal to 4cm, and obtaining wax ball particle diameter is to be approximately equal to 3mm and be approximately equal to two distributions of 1mm (such as Fig. 3 institute
Show).
It tests 15: using fusing point for 85 DEG C of synthetic wax, incidence end is 3X3 nozzle array, and nozzle is circle, incidence end
The internal diameter d=1mm of mouth, 97 DEG C of incidence end temperature, molten wax kinematic viscosity is approximately equal to 12mm2/ s, the neighbouring work in incidence end exit
97 DEG C of matter temperature, total volume flow rate of the molten wax in incidence end exit: 41L/h, each incidence end exit are respectively formed jet stream,
Jet stream segment length is approximately equal to 3cm, obtains wax ball particle diameter and is approximately equal to 3mm.
Compared with prior art, present embodiment include: the entry port of molten state substance and comprising fluid working substance at
Shape tower；The entry port of molten state substance is dipped in fluid working substance, for by molten state substance with preset vol flow velocity from incidence
Port, which is introduced into fluid working substance, forms jet stream, and jet stream forms droplet cluster in fluid working substance, and the drop in droplet cluster is in fluid work
Spherical drop is formed in matter；Wherein, preset vol flow velocity is greater than or equal to the first preset threshold；Wherein, fluid working substance meets pre-
If condition, preset condition includes: that fluid working substance and molten state substance are immiscible, allows molten state substance in interfacial tension
Spherical drop is formed under effect；The density of fluid working substance and the density of molten state substance are unequal, so that molten state droplets of substance
The region where leaving the entry port of molten state substance can be moved under the action of resultant force suffered by it；Fluid working substance
It is default that dynamic viscosity and dynamic viscosity of the molten state substance in the region where the entry port of molten state substance are respectively less than second
Threshold value, the jet stream that molten state substance is formed in the region where entry port diverge to droplet cluster.By molten state object
Matter is introduced into the fluid working substance for meeting above-mentioned condition with the preset vol flow velocity for being greater than or equal to the first preset threshold, molten state object
Matter jet stream dissipates to form droplet cluster, and the drop in droplet cluster forms spherical drop in fluid working substance.The jet stream balling-up system is suitable
For multiple material field, using Portable safety, balling-up speed is fast, production capacity is high, and the forming degree for forming spherical drop is high, partial size
Uniformly.
It is not difficult to find that present embodiment is system embodiment corresponding with first embodiment, present embodiment can be with
First embodiment is worked in coordination implementation.The relevant technical details mentioned in first embodiment still have in the present embodiment
Effect, in order to reduce repetition, which is not described herein again.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in
In first embodiment.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (9)
1. a kind of liquid phase jet stream pelletizing method of solid matter characterized by comprising
Molten state substance is introduced into fluid working substance with preset vol flow velocity from entry port and forms jet stream, the jet stream is described
Droplet cluster is formed in fluid working substance, the drop in the droplet cluster forms spherical drop in the fluid working substance；
Wherein, the preset vol flow velocity is greater than or equal to the first preset threshold；
Wherein, the fluid working substance meets preset condition, and the preset condition includes: the fluid working substance and the molten state object
The density of immiscible, the described fluid working substance of matter and the density of the molten state substance are unequal；
Wherein, power of the dynamic viscosity of the fluid working substance with the molten state substance in the region where the entry port
Viscosity is respectively less than the second preset threshold.
2. the liquid phase jet stream pelletizing method of solid matter according to claim 1, which is characterized in that
First preset threshold is escape velocity of the drop in the droplet cluster in the region where the entry port.
3. the liquid phase jet stream pelletizing method of solid matter according to claim 2, which is characterized in that
The relationship at bulb diameter of the preset vol flow velocity and the drop are as follows: when the preset vol flow velocity is greater than or equal to
When first preset threshold, 3 times of the internal diameter that the entry port is equivalent at bulb diameter of the drop.
4. the liquid phase jet stream pelletizing method of solid matter according to claim 2, which is characterized in that
The relationship at bulb diameter of the preset vol flow velocity and the drop are as follows: when the preset vol flow velocity is greater than or equal to
When the critical speed of the molten state substance, the droplet cluster include two kinds of drops, one of drop it is suitable at bulb diameter
In 3 times of the internal diameter of the entry port；Another internal diameter that the entry port is equivalent at bulb diameter of drop；
Wherein, the critical speed is greater than the escape velocity.
5. the liquid phase jet stream pelletizing method of solid matter according to any one of claim 1 to 4, which is characterized in that institute
It states spherical drop and forms globular solids in the fluid working substance；The preset condition further include:
The temperature of the fluid working substance is successively decreased from the entry port to preset direction；
Wherein, the preset direction meets the following conditions:
When the density of the molten state substance is greater than the density of the fluid working substance, the preset direction and gravity direction phase
Together；When the density of the molten state substance is less than the density of the fluid working substance, the preset direction is opposite with gravity direction.
6. a kind of liquid phase jet stream balling-up system of solid matter, which is characterized in that using any one of the claims 1 to 5
The liquid phase jet stream pelletizing method of the solid matter, comprising: the entry port of molten state substance and comprising fluid working substance at
Shape tower；
The entry port of the molten state substance is dipped in the fluid working substance, is used for the molten state substance with preset vol
Flow velocity is introduced into the fluid working substance from the entry port and forms jet stream, and the jet stream forms drop in the fluid working substance
Group, the drop in the droplet cluster forms spherical drop in the fluid working substance；
Wherein, the preset vol flow velocity is greater than or equal to the first preset threshold；
Wherein, the fluid working substance meets preset condition, and the preset condition includes: the fluid working substance and the molten state object
The density of immiscible, the described fluid working substance of matter and the density of the molten state substance are unequal；
Wherein, power of the dynamic viscosity of the fluid working substance with the molten state substance in the region where the entry port
Viscosity is respectively less than the second preset threshold.
7. the liquid phase jet stream balling-up system of solid matter according to claim 6, which is characterized in that the entry port is in
It is round.
8. the liquid phase jet stream balling-up system of solid matter according to claim 6, which is characterized in that the entry port is
Single port or matrix ports.
9. the liquid phase jet stream balling-up system of the solid matter according to any one of claim 6 to 8, which is characterized in that institute
State that molten state substance is wax, the fluid working substance is water.
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| CN1867516A (en) * | 2003-10-16 | 2006-11-22 | 原子燃料工业株式会社 | Dropping nozzle device, device for recovering dropping undiluted solution, device for supplying dropping undiluted solution, device for solidifying surface of droplet, device for circulating aqueous a |
| CN102895927A (en) * | 2012-10-23 | 2013-01-30 | 中国科学技术大学 | Grain size controllable monodisperse polyvinyl alcohol gel microsphere, preparation method thereof and applied device |
| JP2016160442A (en) * | 2015-02-26 | 2016-09-05 | 住友金属鉱山株式会社 | Manufacturing apparatus and manufacturing method of solder ball |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1867516A (en) * | 2003-10-16 | 2006-11-22 | 原子燃料工业株式会社 | Dropping nozzle device, device for recovering dropping undiluted solution, device for supplying dropping undiluted solution, device for solidifying surface of droplet, device for circulating aqueous a |
| CN102895927A (en) * | 2012-10-23 | 2013-01-30 | 中国科学技术大学 | Grain size controllable monodisperse polyvinyl alcohol gel microsphere, preparation method thereof and applied device |
| JP2016160442A (en) * | 2015-02-26 | 2016-09-05 | 住友金属鉱山株式会社 | Manufacturing apparatus and manufacturing method of solder ball |
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