CN109499476A - Cohesive powders body prepares system and method - Google Patents
Cohesive powders body prepares system and method Download PDFInfo
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- CN109499476A CN109499476A CN201710832844.6A CN201710832844A CN109499476A CN 109499476 A CN109499476 A CN 109499476A CN 201710832844 A CN201710832844 A CN 201710832844A CN 109499476 A CN109499476 A CN 109499476A
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- treating agent
- powder
- surface treating
- blending bunker
- feeding line
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B01J2/16—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
Abstract
The present invention discloses a kind of sticky powder producing system, including being spray-dried tower body, spray drying tower body is connect by the powder feed inlet being set on blending bunker with blending bunker, it further include surface treating agent apparatus for feeding, surface treating agent apparatus for feeding is connected to the position on blending bunker close to the powder feed inlet, and surface treating agent apparatus for feeding is used to turn middle to blending bunker that surface treating agent to be added.Invention additionally discloses a kind of sticky powder preparation method based on above system.Cohesive powders body in the present invention prepares system and method, and surface treating agent is mixed in time with powder, and surface treating agent is modified the surface of the sticky powder such as rubber particles, reduces the reunion degree of sticky powder；Reduce the generation of wall sticking phenomenon, to improve production efficiency and powder yield.
Description
Technical field
The present invention relates to chemical fields, and in particular to a kind of cohesive powders body prepares system and method.
Background technique
Powder material is material form common in Chemical Manufacture, therefore the preparation of powder material is as a kind of important
Technology is increasingly paid attention to by industry.The reunion of powder refers to that powder granule mutually interconnects during preparation, separation, processing and storage
The phenomenon that connecing the biggish particle clusters formed by multiple particles to be formed.Usually according to its formation the reason of, agglomeration one
As be divided into soft-agglomerated and hard aggregation.The soft-agglomerated electrostatic force and library being commonly considered as between the atom due to powder surface, molecule
Caused by logical sequence power, this kind is reunited can eliminate the effect of some chemistry or by way of applying mechanical energy；Hard aggregation is in addition to original
It further include that liquid bridge forces, solid bridge power, chemical bond power and hydrogen bond are made other than sub, intermolecular electrostatic force and Coulomb force
Firmly etc., therefore hard agglomeration its structure during the machine-shaping of powder is not easy to be destroyed, and will affect the property of powder
Energy.
Agglomeration is a problem during superfine powder preparation and preservation, due to ultra-fine rubber particles powder material
Have the characteristics that large specific surface area, itself with viscosity, be easy to agglomeration and have stronger tack so that ultra-fine rubber
Agglomeration easily occurs for particle powder material.Therefore, influence of the agglomeration for the preparation and preservation of ultra-fine rubber particles
It is especially prominent.
If being surface-treated not in time, big reunion agglomeration easy to form is especially easier to send out when temperature is higher
It is raw.Also viscous wall material can be formed in the wall of production equipment, inner wall of the pipe simultaneously, the material of viscous wall is set due to resting on for a long time
On standby or pipeline inner wall, the aggregation that can agglomerate influences product quality if there is local falling off to will form bulk materials.In order to clear
Except the viscous wall material on equipment wall and inner wall of the pipe, it has to which midway stops production, carries out the cleaning work of equipment, thus
The effective production time for shortening equipment reduces the effective capacity of equipment, product is caused to lose.The soft group of ultra-fine rubber particles
The poly- forerunner for often forming hard aggregation, such as dispersion is smashed not in time, will form the bulky grain of hard aggregation.Due to rubber product
Surface-active, it is easier to form the hard aggregation that mechanical force is difficult to break, to influence the performance of material, huge material be caused to damage
It loses.
In order to change the reunion of sticky powder, it is a kind of control rubber particles reunion that dispersing agent is added in powder material
Effective ways.By the addition of appropriate dispersing agent, dispersing agent is attached to rubber particles surface, and rubber particles are separated, by point
The three-dimensional effect of powder, to control the reunion scale of rubber particles.In the prior art, usually using addition dispersion in time
It is modified that the method for agent carries out surface to rubber particles.In addition, mechanical stirring to a certain extent also can break up agglomerates, had
There are the rubber particles of certain dispersion degree, what is generated in production has soft-agglomerated rubber particles agglomerated particle, can be in machinery
It is easily re-dispersed under power effect；Churned mechanically method can be used in combination with the method that dispersing agent is added, at this time mechanical stirring
Dispersing agent can be made preferably to be dispersed in rubber particles surface, so that the stable ultra-fine rubber particles for obtaining ideal distribution produce
Product.
In addition to agglomeration, the phenomenon that influencing material production there is also another in the production of powder material, i.e. material
Wall sticking phenomenon, the concrete reason that viscous wall occurs for usual material have: half wet stock glues wall, and low-melting-point material hot melt is glued wall and done
Glue wall in powder surface.
Ultra fine powder rubber particle product is a kind of new material, and ultra fine powder rubber particle product belongs to powder material,
Conventional products have superfines butadiene-styrene rubber (PSBR), superfines nitrile rubber (PNBR), superfines butadiene rubber
(PBR), superfines neoprene (PCR) and superfines silicon rubber etc..Powdered rubber class product, in dry powder by
In it with surface viscosity, therefore, wall sticking phenomenon and agglomeration are easy to happen in its production and preservation.
Spray drying process is a kind of important powder manufacturing technology, the preparation suitable for a variety of powder materials.Existing
In technology, spray drying technology is used for the preparation of ultra fine powder rubber.The production technology of powdered rubber is prepared in spray drying
In, according to raw material and the difference of preparation process, the average particle size range of powdered rubber usually controls be distributed in 30~500nm between adjust
Control.Due to agglomeration, in the most loose reunions of powdered rubber particle being spray-dried in air-flow, so partial size after practical reunion
Distribution is mostly to be distributed between 10 μm~200 μm, and particle is thrown to equipment wall by centrifugal force and traps them.
The ultra-fine rubber particles that spray drying tower is collected into are intermediate products.Further technical treatment is carried out, is usually to adopt
Vulcanized rubber powder is handled with physical mixing processes, processing method is using mixing apparatus to intermediate products rubber powder and surface
Inorganic agent is mixed, and adheres to upper surface inorganic agent in intermediate products vulcanized rubber powder, to change the surface viscosity of rubber powder, it is ensured that
Rubber powder will not stick together agglomeration in conveying, packaging, storage and transport process.
Since rubber powder itself has viscosity, it will usually there is a certain amount of rubber powder in spray drying tower wall (mainly lower part
Inner wall), feed bin is collected, transfer pipeline, the equipment interior surface such as cyclone collector inner wall is built up, in production due to powder
The viscous wall accumulation such as glue, usually needed to open primary equipment, clear up equipment inside at every 3~5 days.Labor intensity compared with
Greatly, low efficiency.
Due to surface viscosities such as materials, the plastic powder product being collected into, which needs to be transferred to post-processing unit, to be carried out at surface
Reason is not available after blocking because pneumatic conveying will cause pipeline inner wall and assemble viscous wall, therefore is difficult to using pipeline strength for a long time
Conveying.Actually mostly use hand haulage to post-processing unit.Clearing up the viscous wall rubber powder being collected into moiety aggregation agglomeration becomes
Blob of viscose cannot function as ultra-fine rubber powder product, cause the waste of raw material.
Summary of the invention
In order to solve the problems in the prior art, the present invention provides a kind of sticky powder producing system, including spray drying
Tower body, the spray drying tower body are connect with the blending bunker by the powder feed inlet being set on blending bunker, are also wrapped
Include surface treating agent apparatus for feeding, the surface treating agent apparatus for feeding be connected on the blending bunker close to the powder into
The position of material mouth, the surface treating agent apparatus for feeding are used to turn middle to blending bunker that surface treating agent to be added.
Be provided with surface treating agent apparatus for feeding in sticky powder producing system in the present invention, and surface treating agent into
Material equipment is connected to the position of the upper close powder feed inlet of the blending bunker, such to be arranged so that in powder by doing by spraying
When dry tower enters in blending bunker, so that it may which, so that surface treating agent is mixed with powder, surface treating agent is to rubber granule
The surface of the viscosity powder such as son is modified, and reduces the reunion degree of sticky powder.
In the present invention one preferred implementation, the surface treating agent apparatus for feeding includes surface treating agent feed pipe
The first end of line, the surface treating agent feeding line is connect with the bulkhead of the blending bunker in the horizontal direction；The surface
Inorganic agent enters the blending bunker by the surface treating agent feeding line.
Adding such as surface treating agent into blending bunker by the way of pipeline, structure is simple, and it is low in cost, it is raw to be suitable for industry
It produces.The first end of surface treating agent feeding line is connect with the bulkhead of the blending bunker in the horizontal direction, so that surface treatment
Agent can enter in the horizontal direction, so that motion profile of the surface treating agent in blending bunker is more reasonable, thus with viscosity
Powder is more preferably mixed.
In the present invention one preferred implementation, the first end of the surface treating agent feeding line and the blending bunker
Connection angle be adjusted in the horizontal plane.
It can first end to surface treating agent feeding line and the mixture according to the specific nature of surface treating agent
The connection angle in storehouse is adjusted, to expand the adaptability of system, is directed to different sticky powder and surface treating agent,
The reunion degree so that sticky powder can be done.
In the present invention one preferred implementation, the powder feed inlet is set to the top of the blending bunker, described
The central point of powder feed inlet is located on the blending bunker center to bulkhead line in the horizontal direction.
In the present invention one preferred implementation, the central point of the powder feed inlet states blending bunker center described in
Horizontal distance is the central point of the powder feed inlet to 2 times of the bulkhead horizontal distance.
The present invention one it is preferred implement, the water of the central point of the powder feed inlet to the blending bunker center
Projection of the flat line on the horizontal plane where the extended line of the first end of the surface treating agent feeding line, with the surface
The angle of the first end extended line of inorganic agent feeding line is α, 55 °≤α≤75 °.
In the present invention one preferred implementation, the surface treating agent is pulverulent solids, the surface treating agent
Heap density is 0.6g/cm3~3.0g/cm3。
In the present invention one preferred implementation, the surface treating agent apparatus for feeding further includes metering device, the meter
Amount device is set on the surface treating agent feeding line, and the surface treating agent enters described by the metering device
Surface treating agent feeding line.
In the present invention one preferred implementation, the surface treating agent apparatus for feeding further includes air inlet control device, institute
It states air inlet control device to be arranged on the surface treating agent feeding line, enters the surface treating agent feed pipe for controlling
The air quantity for blowing wind of line；What the second end of the surface treating agent feeding line entered blows wind, will enter at the surface
The surface treating agent of reason agent feeding line is blown into the blending bunker.
In the present invention one preferred implementation, the surface treating agent apparatus for feeding further includes air inlet temperature regulating device, institute
It states air inlet temperature regulating device to be positioned close at the second end of the surface treating agent feeding line, described blows wind for controlling
Temperature.
In the present invention, the setting of temperature regulating device is entered the wind so that the temperature for blowing wind is lower, wind is blown and blows surface treating agent
When entering to blending bunker, while the sticky powder that can be entered in blending bunker to spray drying tower body in time is dropped
Temperature reduces sticky powder surface temperature and surface viscosity, to reduce rubber particles reunion degree.
Another aspect of the present invention also provides a kind of sticky powder preparation method, method includes the following steps:
Powder is prepared in spray drying tower body；
Powder is transferred in blending bunker by spray drying tower body；
It is characterized in that, surface treating agent is added in blending bunker when powder enters in blending bunker, at surface
Powder gating location of the agent with powder in blending bunker is managed to be mixed.
In the present invention one preferred implementation, wind is blowed by air inlet control device control and blows into surface treating agent
In blending bunker, it is 0.03~0.3Nm that the flow for blowing wind, which is range of flow,3/Min。
It is described to blow elegance 0.03~0.3MPa compressed air in the present invention one preferred implementation；It is more highly preferred to
, it is described to blow elegance 0.10~0.20MPa compressed air.
In the present invention one preferred implementation, the temperature for blowing air temperature is controlled, control blows air temperature and exists
30 DEG C or less；More preferably, it is 25 DEG C ± 3 DEG C that control, which blows the temperature of wind,.
The reunion degree that powder can preferably be controlled is controlled the temperature for blowing wind, in lower temperature condition
Under, sticky powder is more difficult to reunite.
Generally speaking the present invention in cohesive powders body prepare system and method have it is below the utility model has the advantages that
(1) the cohesive powders body in the present invention, which prepares system and method, can reduce the reunion degree of sticky powder, to subtract
Lacked it is subsequent need spreading the work for mechanical damage viscosity powder aggregate, very high production efficiency.
(2) progress of sticky powder surface is modified in time by surface treating agent, the surface for reducing sticky powder is viscous
Property, so that reducing wall pipeline of the sticky powder in follow-up equipment adheres to viscous wall, equipment cleaning number is reduced, improves equipment
Utilization rate；Due to extending the parking cleaning cycle of equipment, to reduce the manual operation intensity of operator.
(3) reduce wall pipeline of the sticky powder in follow-up equipment and adhere to viscous wall, to reduce because gluing wall again
It carries out falling off to form the amount of unqualified powder, to improve product qualification rate, reduces production cost, reduce the generation of solid waste
Amount.
(4) due to the setting of metering device and air inlet control device, so that surface treating agent improves vulcanized rubber powder performance,
The automatic conveying of sticky powder product may be implemented.
(5) reunion of sticky powder is controlled effectively, so that aggregated particle size range is effectively controlled, into one
Step optimizes final products particle size distribution range, and finished product particle size distribution range range narrows, and agglomerated particle is overall
Attenuate, improves product quality.
Detailed description of the invention
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein:
Fig. 1 is sticky powder producing system and its control flow schematic diagram in the embodiment of the present invention；
Fig. 2 a and Fig. 2 b are that two kinds of connections of the surface treating agent feeding line and blending bunker in the embodiment of the present invention are closed
It is schematic diagram.
In the accompanying drawings, identical component uses identical appended drawing reference.Attached drawing is not according to actual ratio.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
The present invention relates to the explanations that some english abbreviations do an entirety, in which: kg is mass unit kilogram；H is the time
Unit hour；Min is chronomere minute；° be angle degree unit degree；g/cm3It is per cubic centimeter for density unit gram；g/
Min is material unit grams per minute；Kg/h be mass flow unit kilogram per hour；Nm3/ min is indicated: standard state cubic meter
Per minute, N refers to standard state, in particular to 20 degrees Celsius of temperature, and pressure is the state under 1 atmospheric pressure；MPa is pressure list
Position megapascal；DEG C be temperature unit degree Celsius；DN indicates nominal diameter,Indicate diameter；Mm be length unit millimeter, μm be length
Unit micron.
Fig. 1 is sticky powder producing system and its control flow schematic diagram in the embodiment of the present invention, the embodiment of the present invention
In sticky powder producing system, including spray drying tower body 1, spray drying tower body 1 as generation sticky powder receiving
Chamber.As shown in Figure 1, being provided with material liquid inlet module 2, hot wind air inlet module 3 and raw material at the top of spray drying tower body 1
Liquid atomization device 4；In addition, being also provided with tower body air outlet module 7 on spray drying tower body 1；Being spray-dried tower body 1 includes
Positioned at the direct tube section 13 of upside and positioned at the cone section 14 direct tube section 13 downside and connect with direct tube section 13.Specifically by being spray-dried
The process that technique obtains sticky powder is highly developed in the prior art, and details are not described herein.The embodiment of the present invention uses
Spray drying technology carries out the preparation of sticky powder, and the specific embodiment of the present invention is particularly suitable for the production of ultra fine powder rubber particle
The preparation of product.
It as shown in Fig. 1 and Fig. 2 a (or Fig. 2 b), is spray-dried on tower body 1 and is provided with powder outlet 11, powder outlet 11 is logical
The blending bunker of powder feed inlet 51 and 55 being set on blending bunker 5 is crossed to connect, in Fig. 1, powder outlet 11 and powder into
Material mouth 51 connect by the connection of tubular structure, the tubular structure upper end with spray drying tower body 1, tubular structure lower end with mix
It closes feed bin 5 to connect, to realize transfer of the powder by spray drying tower body 1 to blending bunker 5.Preferably, powder outlet with
It is provided with self-emptying valve 12 between spray drying tower body 1, passes through the more accurate letter of control of the self-emptying valve 12 for discharging
Just.
Sticky powder producing system in the embodiment of the present invention further includes surface treating agent apparatus for feeding 6, surface treating agent
Apparatus for feeding 6 is connected to the position on 6 blending bunkers 5 close to powder feed inlet, and surface treating agent apparatus for feeding 6 is used for mixing
5 turns of feed bin middle addition surface treating agents.Surface treating agent in the present invention can be calcium carbonate, kaolin, talcum powder, hydroxide
The inorganic particles such as magnesium, aluminium hydroxide.Surface treating agent is mixed with the powder entered in blending bunker 5, to reduce powder
The surface viscosity of body, to control agglomerating into for sticky powder.Specifically, preparing ultra-fine rubber particles process in spray-on process
In, surface treatment is added immediately after ultra-fine rubber particles drying and moulding and divides agent, surface treatment is carried out to ultra-fine rubber particles and is changed
Property, to control agglomerating into for ultra-fine rubber particles, it is made no longer to be easy to reunite and viscous wall, it is difficult to which formation is attached to container tube
The adhesive layer of road surfaces, to extend the cleaning cycle of container pipeline；Related powder granule is reduced to occur after being gathered in
Surface attachment in continuous equipment installation, convenient for using Pipeline transport powder；It is added by the timely dispersion of surface treating agent, control
The formation that ultra-fine rubber particles are reunited avoids hard aggregation, and reduction is soft-agglomerated, so that product be made to be easy to break up mixing, reduces subsequent
Mechanical high-speed jitter time avoids high-temperature denaturation, improves production efficiency, reduces energy consumption.
As the further improvement to surface treating agent apparatus for feeding 6, surface treating agent in the embodiment of the present invention into
Expect equipment 6 include surface treating agent feeding line 61, the first end 611 of surface treating agent feeding line in the horizontal direction with mix
The bulkhead of feed bin 5 connects；Surface treating agent is entered in blending bunker 5 by surface treating agent feeding line 61.
Preferably, as shown in Figure 1, powder feed inlet 51 is set to the top of blending bunker 5, the center of powder feed inlet 5
Point is located on 5 center of blending bunker to bulkhead line in the horizontal direction.As shown in Fig. 2, by 5 center of blending bunker to bulkhead
Distance is L, and the horizontal distance at central point to the blending bunker center of powder feed inlet 51 is the central point of the powder feed inlet
To 2 times of the bulkhead horizontal distance, i.e., wherein the horizontal distance at the central point of powder feed inlet 51 to blending bunker center is
2/3L, the central point of feed inlet to the bulkhead horizontal distance are 1/3L.
In some embodiments, exhaust outlet 55 can also be set on blending bunker 5, adjusted in blending bunker 5 with this
It is pressure environment, such as can be in the open state with thing exhaust outlet 55, so that guaranteeing is normal pressure ring in blending bunker 5
Border.
In some embodiments, the first end 611 of surface treating agent feeding line 61 and the connection angle of blending bunker 5 exist
It is adjusted on horizontal plane.Specifically, such adjust is in order to enable realizing optimal mix between surface treating agent and powder.
Fig. 2 a and Fig. 2 b are two kinds of connection relationship diagrams of the surface treating agent feeding line and blending bunker in the present invention；Fig. 2 a and
Fig. 2 b is the partial top view of the sticky powder producing system in Fig. 1, including 61 first end of surface treating agent feeding line, 611 He
Blending bunker 51.Wherein, the horizontal line at the central point of powder feed inlet 51 to 5 center of blending bunker is fed in surface treating agent
The projection on horizontal plane where the extended line of the first end 611 of pipeline 61, the first end 611 with surface treating agent feeding line
The angle of extended line is α, in the present invention α value range are as follows: 55 °≤α≤75 °.α is 55 ° in fig. 2 a, and α is in fig. 2 a
75°.Such as α can be the intermediate values such as 60 °, 65 ° or 70 °, those skilled in the art's disclosure according to the present invention can be clear
Chu obtains, and details are not described herein.
Preferably, as shown in Figure 2 a and 2 b, the central point of powder feed inlet 51 therein is in surface treating agent feed pipe
The projection on horizontal plane where the extended line of the first end 611 of line 61, positioned at the first end of surface treating agent feeding line 61
On 611 extended line.Such set-up mode to enter mixture by the first end 611 of surface treating agent feeding line 61
When in storehouse 5, directly mixed with the powder entered in blending bunker 5 from powder feed inlet 51.Preferably, as Fig. 1 and Fig. 2 a (or
Fig. 2 b) shown in, blending bunker 5 includes being located at the direct tube section 52 of upside and connecting on the downside of direct tube section 52 and with direct tube section 52
Bore section 53；The first end 611 of surface treating agent feeding line 61 therein is connect with the bulkhead of direct tube section 52, and close to powder
The position of body feed inlet 51.Specifically consider that the caliber of surface treating agent feeding line, the extended line in the present invention refer to
The extended line of the center line of surface treating agent feeding line.Such setting is so that sticky powder enters the moment of blending bunker i.e.
It can be contacted with surface treating agent, to be more advantageous to the mixing of the two and reduce the reunion degree of sticky powder.
In addition, in order to which the mixture to powder sticky in blending bunker 5 and surface treatment is collected, in the case where boring section 53
Exit, which is connected with, collects feed bin 54；Feed bin 54 is collected in order to transfer out the mixture collected in feed bin 54, is collecting feed bin
The exit of 54 downside mixtures, is connected with and is provided with powder conveying apparatus 8, and in the present invention, powder conveying apparatus 8 includes powder
Material conveyer 81 and powder carry pipeline 82, powder conveyor 81 are connect with the first end 821 of powder carry pipeline 82；It can be with
The conveying of mixture is carried out by the way of blowing wind, therefore air supply module 83 as shown in Figure 1 can be set.Mixture by
The second end 822 of powder carry pipeline 82 enters in powder product storehouse 9, is packaging module 91 in the downstream of powder product storehouse 9.
In order to guarantee that the air pressure in powder product storehouse 9 is normal pressure, the top of powder product storehouse 9 is provided with the mouth 92 that leaks informaton.
In some cases, can be to mixture in collection feed bin 54 by the way of artificial, such as movement can be used
Hopper shifts the mixture that the exit for collecting 54 downside mixture of feed bin is collected into, and mixture is transferred to subsequent
In module, to carry out the operations such as subsequent packaging.
Preferably, the surface treating agent in the present invention is solid fines shape material, and heap density range is in 0.6~3.0g/cm3
Between, the best angle of α can be adjusted according to the heap density of surface treating agent, the heap density of surface treating agent is close to 0.6g/
cm3Then the angle at the angle α is closer to 55 ° to be excellent, and the heap density of surface treating agent is close to 3.0g/cm3Then the angle at the angle α more connects
It is excellent for being bordering on 75 °；Wherein as shown in Figure 2 a, the angle α therein is 55 °, and the angle α therein as shown in Figure 2 b is 75 °.The degree at the angle α
Selection surface treating agent can be made to be entered in blending bunker 5 in optimal manner, thus realize with powder most sufficiently
Mixing, as shown in Figure 2 a and 2 b, the path 10 of arrow therein mark is to mix after surface treating agent is mixed with powder
General path in feed bin 5, by the path it is found that the mixture of surface treating agent and powder can be made to be able to sufficiently mix in this way
It closes, while reducing sticky powder reuniting degree.
As to further improvement of the invention, as shown in Figure 1, surface treating agent apparatus for feeding 6 further includes metering dress
62 are set, metering device 62 is set on surface treating agent feeding line 61, and surface treating agent enters table by metering device 62
Surface treatment agent feeding line 61.It further, will be as shown in Figure 1, surface treating agent feeding line 61 be multi-segment structure, close to the
One section of one end 611 is first segment, and first segment is horizontally disposed, and one section where metering device 62 is second segment, second segment and the
One section of connection, and the height of the one end of second segment far from first segment in the vertical direction is higher than one that second segment is connect with first segment
The height at end；Further third section connect with second segment, and the one end of third section far from second segment is in the vertical direction
Height is greater than or equal to the height of one end that third section is connect with second segment.So that second segment is inclined, so that
It can be slided under the effect of gravity by the surface treating agent that metering device 62 enters in 61 second segment of surface treating agent feeding line
First segment, and surface treating agent is avoided to enter third section, so that entering at the surface of surface treating agent feeding line 61
Reason agent is fully utilized.Further, metering device 62 therein can be weighing balance, be adjusted at surface by weighing balance
The additional amount of agent is managed, adjustment process is convenient and efficient；Preferably, the range of flow of weighing balance is 20g/min~100g/min, flow
Range is appropriate, and the accuracy of weighing balance metering can be improved and can be good at wanting for the addition speed for reaching surface treating agent
It asks.
Preferably, as shown in Figure 1, surface treating agent apparatus for feeding 6 further includes air inlet control device 63, the air inlet control
Device 63 is arranged on the surface treating agent feeding line, for controlling blowing into the surface treating agent feeding line
The air quantity of wind, what the second end 612 of surface treating agent feeding line entered blows wind, will enter surface treating agent feeding line 61
Surface treating agent be blown into blending bunker 5.Further, air inlet control device 63 includes flowmeter 631 and volume control damper
632, flowmeter 631 and volume control damper 632 are arranged in series on surface treating agent feeding line 61, flowmeter 631 relative to
Second end 612 of the component control valve closer to surface treating agent feeding line；It blows wind and surface treating agent is entered by second end
Feeding line 61, wherein flowmeter 631 measures the flow for blowing wind, and the size of flow can pass through control valve
632 are adjusted.Additionally, it is preferred that, it is matched, be may be implemented to blowing wind with Boiler pressure control valve 632 by flowmeter 631
The automatic control of flow.Preferably, the range of flow for blowing wind is 0.03~0.3Nm3/ min (in the present invention, Nm3/ min is indicated:
Standard state cubic meters per minute, N refer to standard state, in particular to 20 degrees Celsius of temperature, and pressure is the shape under 1 atmospheric pressure
State).
Further, it uses compressed air to provide for 61 second end 612 of surface treating agent feeding line and blows wind, preferably
, compressed air selects the compressed air of 0.03~0.3MPa；It is furthermore preferred that selecting the compressed air of 0.10~0.20MPa.
Since the temperature of sticky powder surface is for tacky surfaces powder, have very especially for rubber particles surface viscosity
Big influence；Rubber particles surface viscosity also can be relatively low in the lower situation of typical temperature.Therefore the present invention is to sticky powder
Surface temperature controlled.Preferably, as shown in Figure 1, the present invention is entered the wind by being arranged in surface treating agent apparatus for feeding 6
Temperature regulating device 64, air inlet temperature regulating device 64 is positioned close at the second end 612 of surface treating agent feeding line 61, for controlling
The temperature for blowing wind；The temperature of wind is blowed by controlling, blow wind and when sticky powder contacts, sticky powder can be reduced
Temperature.Preferably, the temperature for blowing wind is controlled at 30 DEG C or less；In the case where some more common, it is preferred that blow wind
Temperature control at 25 ± 3 DEG C, i.e., 22 DEG C~28 DEG C.
Based on above-mentioned sticky powder producing system, invention additionally discloses a kind of sticky powder preparation method, this method packets
Include following steps:
Powder is prepared in spray drying tower body 1；
Powder is transferred in blending bunker 5 by spray drying tower body 1；
When powder enters in blending bunker 5, surface treating agent is added in blending bunker, surface treating agent and powder
It is mixed in the powder gating location of blending bunker.
Preferably, wind is blowed by the control of air inlet control device 63 to blow into surface treating agent in blending bunker, blow
The range of flow of wind is 0.03~0.3Nm3/min。
Preferably, the compressed air for blowing 0.03~0.3MPa of elegance；Further, select 0.10~
The compressed air of 0.20MPa.
Preferably, the method in the present invention can control the temperature for blowing air temperature, blow the temperature control of wind
At 30 DEG C or less.In the case where some more common, it is preferred that the temperature for blowing wind is controlled at 25 ± 3 DEG C, i.e., and 22 DEG C~28
℃。
According to above-mentioned sticky powder producing system, below with reference to actual production instance to the sticky powder in the present invention
The effect of preparation system and method is specifically described.
Embodiment 1
Using SBR emulsion as the superfines butadiene-styrene rubber product of raw material, final products are compound for preparation in this implementation
Butadiene-styrene rubber rubber powder product.
In the present embodiment, the dry tower body 1 of mist is cone bottom tower drier, and 5 equipment of blending bunker is cone bottom container.Its
In, the diameter of spray drying 1 direct tube section of tower body isIts direct tube section height is 2000mm, and cone section height is
3000mm bores the outlet undergauge of section lower end extremelyThe diameter of 5 direct tube section of blending bunker isIts straight tube
Duan Gaodu is 800mm, and cone section height is 500mm, bores the outlet undergauge of section lower end extremely
51 central point of powder feed inlet of blending bunker 5 is located at bulkhead and 5 center spacing 2/3 of blending bunker.Powder goes out
Mouth 11 is connected with powder feed inlet 51 by a tubular structure, and the caliber of tubular structure is that (wherein DN indicates caliber ruler to DN200
Very little is nominal diameter), blending bunker 5 and spray drying tower body 1 are normal pressure.
Surface treating agent is calcium carbonate superfine powder particle, and calcium carbonate superfine powder particle is by metering device 62 according to 4.0kg/h (its
Middle kg/h is kilogram per hour) speed feed.
The surface treating agent feeding line 61 of surface treating agent apparatus for feeding 6 is connected on 5 direct tube section 51 of blending bunker, is hung down
Straight position is on direct tube section, and center line is apart from direct tube section and cone 52 delivery position of section, 60 centimeters.Surface treating agent feeding line
61 entrance on bulkhead is slotted eye, enters opening's edge and bulkhead tangential direction is connected on bulkhead at an angle, at surface
Reason 61 caliber of agent feeding line is nominal diameter DN50.
The central point of powder feed inlet 51 to 5 center of blending bunker horizontal line in surface treating agent feeding line 61
The projection on horizontal plane where the extended line of first end 611, with 611 extended line of first end of surface treating agent feeding line
Angle is α, and α degree is 55 °.
Air inlet control device 63 is provided on surface treating agent feeding line 61, wind control device 63 includes flowmeter
631 and volume control damper 632；The control for volume control damper 632 is realized by flowmeter 631, feeds surface treating agent
The feed quantity of blow flow amount and metering device 62 in pipeline 61 matches；Wherein, surface treating agent calcium carbonate superfine powder particle
It feeds according to the speed of 4.0kg/h (wherein kg/h be kilogram per hour).Calcium carbonate superfine powder granular pile density used is (false close
Degree) it is 0.6g/cm3(wherein g/cm3It is gram per cubic centimeter for density unit)；At the same time, elegance is blowed to be compressed with 0.01MPa
Air；Blowing wind flow is about 0.10Nm3/min。
Air inlet temperature regulating device 64 is to blow wind to carry out temperature control by 10 DEG C of cold water, and control blows air temperature at 25 DEG C ± 3 DEG C.
Feed bin 54 is collected in the lower outlet setting of blending bunker 5；It collects feed bin 54 and mixing section is set, collect 54 inlet of feed bin
Diameter beAnd straight tube segment length 600mm.
In this embodiment, a kind of ultra-fine rubber powder of butadiene-styrene rubber (sticky powder) is prepared using styrene butadiene rubber latex, in production,
It is provided with 12 self-emptying valve 12 of self-emptying valve between powder outlet 11 and spray drying tower body 1, it is super to automatically control butylbenzene
The discharging speed of thin rubber powder；The constant rate of production of the ultra-fine rubber powder of butylbenzene is 80kg/h (kg/h be kilogram per hour), surface treating agent
It is 5.0% with the weight ratio of the ultra-fine rubber powder of butylbenzene, therefore, it be that (kg/h is kilogram often small to 4.0kg/h that speed, which is added, in surface treating agent
When).
Metering device 62 is that micro powder feeds scale；Surface treating agent calcium carbonate superfine powder particle is set according to 4.0kg/h's
Speed feeds.
Powder conveyor 81, powder carry pipeline 82 and powder product feed bin 9 are surveyed for the compound sbr powder conveying of product
Examination.
Sticky powder producing system is run according to the above setup parameter, continuously-running is not less than 60 hours.
It in the present embodiment, is tested by four times, test is stopped after running 60 hours every time.It is cleared up after experiment every time
Blending bunker 5, collection feed bin 54, powder conveyor 81, powder carry pipeline 82, rubber powder product feed bin 9 etc., clean out viscous wall fourth
Benzene rubber powder amount is as shown in table 1:
Table 1
| For the first time | Second | For the third time | 4th time |
| 0.355kg | 0.398kg | 0.316kg | 0.376kg |
Powder conveying apparatus runs well, and during continuous operation, the normal conveying butadiene-styrene rubber composite glue powder of test is produced every time
Product about 5040kg.Powder carry pipeline 82 is dismantled, inside pipe wall is without the butadiene-styrene rubber composite glue powder material significantly built up.
Particle size distribution range is distributed between being 10 μm~200 μm after the compound sbr powder product being collected into is reunited.
Comparative example 1
This comparative example adjusts equipment and process according to above embodiments 1；Preparation is using SBR emulsion as the ultra-fine of raw material
Powder styrene butadiene rubber product, final products are superfines butadiene-styrene rubber product.
This comparative example place different from embodiment 1 is, in this comparative example, does not start surface treating agent apparatus for feeding
6。
Material liquid inlet module 2 supplies butylbenzene glue according to the constant rate of production 80kg/h of ultra-fine sbr powder.
According to 1 setup parameter running gear of embodiment, a length of 330~380 when equipment continuously-running in the comparative example
Minute.Parking terminates the termination condition of production are as follows: in the case where conveying the constant situation of air quantity, transmission power increases powder conveying apparatus
30%, it is transfer pipeline because caliber becomes smaller caused by blocking that flow, which reduces reason, and the resistance of ducting increases.
This comparative example carries out four experiments altogether, and each time experiment continuous operating time is as shown in table 2,
Table 2
| For the first time | Second | For the third time | 4th time |
| 350 minutes | 380 minutes | 330 minutes | 335 minutes |
Powder carry pipeline 82 is dismantled, interior part is managed and has blocked 30% or more.
Parking cleaning blending bunker 8 collects feed bin 54, powder conveyor 81, powder carry pipeline 82, rubber powder product feed bin
9 etc., it is as shown in table 3 to clean out the compound sbr powder amount of viscous wall.
Table 3
| For the first time | Second | For the third time | 4th time |
| 0.515kg | 0.545kg | 0.501kg | 0.409kg |
Particle size distribution range is distributed between being 10 μm~1000 μm after the compound sbr powder product being collected into is reunited.
Now embodiment 1 and comparative example 1 are compared, specific as shown in table 4:
Table 4
From the comparison of embodiment 1 and comparative example 1: due to being prepared in embodiment 1 using the cohesive powders body in the present invention
System, so that continuous operating time is long, the wall sticking phenomenon of sticky powder is significantly reduced；Compound sbr powder product cut size is smaller,
To illustrate that the agglomeration between powder is less；Since continuous operating time is longer, to realize continuous production, realize larger
The production of the product of amount, and reduce the time as required for pipeline and equipment cleaning, improve production efficiency.
Embodiment 2
Using acrylonitrile-butadiene rubber latex as the superfines nitrile rubber product of raw material, final products are compound for preparation in this implementation
Nitrile rubber rubber powder product.
In the present embodiment, the dry tower body 1 of mist is cone bottom tower drier, and 5 equipment of blending bunker is cone bottom container.It is spraying dry
The diameter of dry 1 direct tube section of tower body isIts direct tube section height is 1200mm, and cone section height is 1500mm, is bored under section
The outlet undergauge at end is extremelyThe diameter of 5 direct tube section of blending bunker isIts direct tube section height is 800mm, cone
Duan Gaodu is 500mm, bores the outlet undergauge of section lower end extremely5 rubber powder feed inlet of blending bunker, 51 central point is located at
At bulkhead and 5 center spacing 2/3L of blending bunker.Powder outlet 11 is connected with powder feed inlet 51 by a tubular structure, is managed
The caliber of shape structure is DN200, and blending bunker 5 and spray drying tower body 1 are normal pressure；
Surface treating agent is Ultra Fine Silica particle, and according to 2.0kg/h, (wherein kg/h is kilogram per small to Ultra Fine Silica particle
When) charging.
Ultra Fine Silica granular pile density (apparent density) used is 0.73g/cm3~0.79g/cm3.Surface treating agent charging is set
Standby 6 surface treating agent feeding line 61 is connected on the direct tube section 51 of blending bunker 5, and upright position is center on direct tube section
Linear distance direct tube section and cone 52 delivery position of section, 60 centimeters.
Entrance of the surface treating agent feeding line 61 on bulkhead is slotted eye, enters opening's edge and bulkhead tangential direction in one
Determine angle to be connected on bulkhead.61 caliber of surface treating agent feeding line is nominal diameter DN50.
The central point of powder feed inlet 51 to 5 center of blending bunker horizontal line in surface treating agent feeding line 61
The projection on horizontal plane where the extended line of first end 611, with 611 extended line of first end of surface treating agent feeding line
Angle is α, and the angle α is adjusted to 60 °.
Air inlet control device 63 is provided on surface treating agent feeding line 61, wind control device 63 includes flowmeter
631 and volume control damper 632；The control for volume control damper 632 is realized by flowmeter 631, feeds surface treating agent
The feed quantity of blow flow amount and metering device 62 in pipeline 61 matches；Surface treating agent Ultra Fine Silica particle according to
The speed of 2.0kg/h (wherein kg/h be kilogram per hour) feeds.Ultra Fine Silica granular pile density (apparent density) used is
0.73~0.79g/cm3(wherein g/cm3It is gram per cubic centimeter for density unit)；At the same time, elegance is blowed to be pressed with 0.01MPa
Contracting air；Blowing wind flow range is 0.11Nm3/min；
Air inlet temperature regulating device 64 is to blow air control temperature by 10 DEG C of cold water, and control blows air temperature at 25 DEG C ± 3 DEG C.
Feed bin 54 is collected in the lower outlet setting of blending bunker 5；It collects feed bin 54 and mixing section is set, the diameter of inlet isAnd straight tube segment length 600mm.
In this embodiment, a kind of ultra-fine rubber powder of nitrile rubber (sticky powder) is prepared using nitrile rubber latex, in production,
The constant rate of production of the ultra-fine rubber powder of nitrile rubber is 30kg/h (kg/h be kilogram per hour), and surface treating agent is ultra-fine with nitrile rubber
The weight ratio of rubber powder is 3.0%, i.e., it be 0.9kg/h (kg/h for kilogram per hour) that speed, which is added, in surface treating agent.
Metering device 62 is that micro powder feeds scale；Setting Ultra Fine Silica particle feeds according to the speed of 0.9kg/h.
Powder conveyor 81, powder carry pipeline 82 and powder product feed bin 9 are surveyed for the compound nitrile rubber powder conveying of product
Examination.
Sticky powder producing system is run according to the above setup parameter, continuously-running is not less than 60 hours.
It in the present embodiment, is tested by four times, test is stopped after running 60 hours every time.Every time after experiment respectively
Clear up blending bunker 5, collect feed bin 54, powder conveyor 81, powder carry pipeline 82, rubber powder product feed bin 9 etc., it cleans out viscous
Wall rubber powder amount is as shown in table 5:
Table 5
| For the first time | Second | For the third time | 4th time |
| 0.423kg | 0.458kg | 0.411kg | 0.402kg |
Powder carry module runs well, and during continuous operation, the normal conveying compounded nitrile rubber rubber powder of test is produced every time
Product about 1854kg.Powder carry pipeline 82 is dismantled, inside pipe wall is without the compounded nitrile rubber powder material significantly built up.
Particle size distribution range is distributed between being 10 μm~150 μm after the compounded nitrile rubber powder product being collected into is reunited.
Comparative example 2
This comparative example adjusts equipment and process according to embodiment 2；Preparation is using acrylonitrile-butadiene rubber latex as the superfines of raw material
Nitrile rubber product, final products are compounded nitrile rubber rubber powder product.
This comparative example place different from embodiment 2 is, in this comparative example, does not start surface treating agent apparatus for feeding
6。
Material liquid inlet module 2 supplies butyronitrile glue according to the constant rate of production 30kg/h of ultra-fine nitrile rubber powder.
According to 2 setup parameter running gear of embodiment, a length of 1220~1450 when equipment continuously-running in this comparison
Minute.Parking terminates the termination condition of production are as follows: in the case where conveying the constant situation of air quantity, transmission power increases powder conveying apparatus
30%, it is transfer pipeline because caliber becomes smaller caused by blocking that flow, which reduces reason, and the resistance of ducting increases.
This comparative example carries out four experiments altogether, and each time experiment continuous operating time is as shown in table 6,
Table 6
| For the first time | Second | For the third time | 4th time |
| 1450 minutes | 1370 minutes | 1220 minutes | 1410 minutes |
Powder carry pipeline 82 is dismantled, interior part is managed and has blocked 50% or more.
Parking cleaning blending bunker 8 collects feed bin 54, powder conveyor 81, powder carry pipeline 82, rubber powder product feed bin
9 etc., it is as shown in table 7 to clean out the compound nitrile rubber powder amount of viscous wall,
Table 7
| For the first time | Second | For the third time | 4th time |
| 0.615kg | 0.585kg | 0.563kg | 0.602kg |
Particle size distribution range is distributed between being 10 μm~800 μm after the compound nitrile rubber powder product being collected into is reunited.
Now embodiment 2 and comparative example 2 are compared, specific as shown in table 8:
Table 8
From the comparison of embodiment 2 and comparative example 2: due to being prepared in embodiment 2 using the cohesive powders body in the present invention
System, so that continuous operating time is long, the wall sticking phenomenon of sticky powder is significantly reduced；Compound nitrile rubber powder product cut size is smaller,
To illustrate that the agglomeration between powder is less；Since continuous operating time is longer, to realize continuous production, realize larger
The production of the product of amount, and reduce the time as required for pipeline and equipment cleaning, improve production efficiency.
Although by reference to preferred embodiment, invention has been described, the case where not departing from the scope of the present invention
Under, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as there is no structures to rush
Prominent, items technical characteristic mentioned in the various embodiments can be combined in any way.The invention is not limited to texts
Disclosed in specific embodiment, but include all technical solutions falling within the scope of the claims.
Claims (14)
1. a kind of viscosity powder producing system, including spray drying tower body, the spray drying tower body is by being set to mixture
Powder feed inlet on storehouse is connect with the blending bunker, which is characterized in that further includes surface treating agent apparatus for feeding, the table
Surface treatment agent apparatus for feeding be connected on the blending bunker close to the powder feed inlet position, the surface treating agent into
Expect that surface treating agent is added in being used to turn to blending bunker in equipment.
2. viscosity powder producing system according to claim 1, which is characterized in that the surface treating agent apparatus for feeding packet
Include surface treating agent feeding line, the first end of the surface treating agent feeding line in the horizontal direction with the blending bunker
Bulkhead connection；
The surface treating agent enters the blending bunker by the surface treating agent feeding line.
3. viscosity powder producing system according to claim 2, which is characterized in that the surface treating agent feeding line
First end and the connection angle of the blending bunker are adjusted in the horizontal plane.
4. viscosity powder producing system according to claim 3, which is characterized in that the powder feed inlet is set to described
The top of blending bunker, the central point of the powder feed inlet are located at the blending bunker center to the bulkhead in the horizontal direction
Line on.
5. viscosity powder producing system according to claim 4, which is characterized in that the central point of the powder feed inlet arrives
The horizontal distance for stating blending bunker center is the central point of the powder feed inlet to 2 times of the bulkhead horizontal distance.
6. viscosity powder producing system according to claim 5, which is characterized in that the central point of the powder feed inlet arrives
The horizontal line at the blending bunker center is in the level where the extended line of the first end of the surface treating agent feeding line
Projection on face, the angle with the first end extended line of the surface treating agent feeding line are α, 55 °≤α≤75 °.
7. viscosity powder producing system according to any one of claim 1 to 6, which is characterized in that the surface treatment
Agent is pulverulent solids, and the heap density of the surface treating agent is 0.6g/cm3~3.0g/cm3。
8. viscosity powder producing system according to claim 2, which is characterized in that the surface treating agent apparatus for feeding is also
Including metering device, the metering device is set on the surface treating agent feeding line, and the surface treating agent passes through institute
It states metering device and enters the surface treating agent feeding line.
9. viscosity powder producing system according to claim 8, which is characterized in that the surface treating agent apparatus for feeding is also
Including air inlet control device, the air inlet control device is arranged on the surface treating agent feeding line, enters for controlling
The air quantity for blowing wind of the surface treating agent feeding line；
What the second end of the surface treating agent feeding line entered blows wind, will enter the surface treating agent feeding line
Surface treating agent is blown into the blending bunker.
10. sticky powder producing system according to claim 8 or claim 9, which is characterized in that the surface treating agent charging is set
Standby further includes air inlet temperature regulating device, and the air inlet temperature regulating device is positioned close to the second end of the surface treating agent feeding line
Place, for controlling the temperature for blowing wind.
11. a kind of viscosity powder preparation method, method includes the following steps:
Powder is prepared in spray drying tower body；
Powder is transferred in blending bunker by spray drying tower body；
It is characterized in that, surface treating agent is added in blending bunker when powder enters in blending bunker, surface treating agent
Powder gating location with powder in blending bunker is mixed.
12. viscosity powder preparation method according to claim 11, which is characterized in that blown by air inlet control device control
Air-supply blows into surface treating agent in blending bunker, and the range of flow for blowing wind is 0.03~0.3Nm3/min。
13. viscosity powder preparation method according to claim 11, which is characterized in that it is described blow elegance with 0.03~
0.3MPa compressed air.
14. viscosity powder preparation method according to claim 12 or 13, which is characterized in that the temperature for blowing air temperature
It is controlled, the temperature for blowing wind is controlled at 30 DEG C or less.
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