CN111457677B - Online drying and mixing system and method for superfine powder - Google Patents
Online drying and mixing system and method for superfine powder Download PDFInfo
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- CN111457677B CN111457677B CN202010422533.4A CN202010422533A CN111457677B CN 111457677 B CN111457677 B CN 111457677B CN 202010422533 A CN202010422533 A CN 202010422533A CN 111457677 B CN111457677 B CN 111457677B
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- 239000000843 powder Substances 0.000 title claims abstract description 117
- 238000001035 drying Methods 0.000 title claims abstract description 60
- 238000002156 mixing Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 85
- 239000007921 spray Substances 0.000 claims abstract description 29
- 238000000889 atomisation Methods 0.000 claims abstract description 15
- 238000003860 storage Methods 0.000 claims description 51
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 230000002572 peristaltic effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 19
- 239000000463 material Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000008187 granular material Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 239000011259 mixed solution Substances 0.000 description 11
- 230000001105 regulatory effect Effects 0.000 description 7
- 102220524642 Ribosomal protein S6 kinase beta-2_I30A_mutation Human genes 0.000 description 5
- 239000011812 mixed powder Substances 0.000 description 5
- 239000003595 mist Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/10—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour carrying the materials or objects to be dried with it
- F26B3/12—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour carrying the materials or objects to be dried with it in the form of a spray, i.e. sprayed or dispersed emulsions or suspensions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/04—Agitating, stirring, or scraping devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention belongs to the field of material preparation, and relates to an on-line drying and mixing system and method for superfine powder. The superfine powder on-line drying and mixing system comprises an atomization drying device, a mixing drying device, a powder secondary collecting device, a liquid feeding device and an air inlet device. According to the system, different powder atomization drying time differences are utilized, powder particles which are dried first are adsorbed and wrapped by powder atomization liquid which is dried slowly, so that different powder can be mixed preliminarily in an atomization drying stage, and the powder is uniformly mixed before being dried for the second time, so that the purpose of on-line powder drying and mixing is achieved, the site, equipment investment and energy consumption are saved, and the production efficiency is improved; through setting up annular jet duct in the middle part in the desicator, can upwards spray dry hot air current with certain angle, form the turbulent flow in atomizer below region, can dry the atomizing liquid drop in the desicator, with powder granule roll, stir, make different powders further mix.
Description
Technical Field
The invention belongs to the field of material preparation, and particularly relates to an on-line drying and mixing system and method for superfine powder.
Background
In actual production, a plurality of ultrafine powder materials with different components are often required to be mixed and processed into a final product according to proportion, the characteristics of different powder materials are different, the preparation process is also different, and the mixing uniformity of the powder can directly influence the performance of the final product. The superfine powder is easy to agglomerate in the production and application processes due to small particle size, different superfine powder is difficult to uniformly mix in a common stirring process, when the superfine powder mixed material is prepared, the superfine powder is often required to be prepared firstly through different wet processes, dried and collected, then the powder is mixed and processed into the mixed material according to a proportion, the working procedures are more, in the existing production technology, special production devices are required in the dispersing, drying, mixing and other working sections, the device investment is large, the occupied area is large, the energy consumption is high, and impurities are easy to introduce in the powder mixing process.
Disclosure of Invention
The invention aims to provide an on-line drying and mixing system and method for superfine powder, which are used for directly carrying out on-line spray atomization drying, package mixing, dry mixing and secondary drying on superfine powder mixed liquid with different components according to a proportion to prepare a final mixed material.
Specifically, the invention provides an on-line drying and mixing system for superfine powder, which comprises an atomization drying device, a mixing drying device, a powder secondary collecting device, a liquid feeding device and an air inlet device;
the atomization drying device comprises a dryer, wherein an atomizer I is arranged at the inner top end of the dryer, an atomizer II and an annular air injection pipeline are arranged on the inner side wall of the dryer, the atomizer II is positioned below the atomizer I, nozzle openings of the atomizer I and the atomizer II are opposite to each other and keep a certain distance, and the annular air injection pipeline is positioned below the atomizer II and keeps a certain distance;
the mixing and drying device comprises a mixer, a secondary dryer and a storage tank I, wherein the mixer is positioned below the dryer, a feed inlet of the mixer is communicated with a bottom discharge outlet of the dryer, a discharge outlet of the mixer is communicated with a powder inlet of the secondary dryer, and a powder outlet of the secondary dryer is communicated with the storage tank I;
the powder secondary collection device comprises a cyclone separator and a storage tank II, wherein a feed inlet of the cyclone separator is communicated with a gas outlet of the secondary dryer, the bottom of the cyclone separator is communicated with the storage tank II, and the top of the cyclone separator is communicated with the tail gas treatment system;
the liquid conveying device comprises a liquid storage tank I and a liquid storage tank II; the liquid storage tank I is communicated with a liquid inlet of the atomizer I through a conveying pump I and a pipeline; the liquid storage tank II is communicated with a liquid inlet of the atomizer II through a conveying pump II and a pipeline;
the air inlet device comprises a blower, a heat exchanger I and a heat exchanger II; the air outlet of the air feeder is respectively communicated with the air inlets of the heat exchanger I and the heat exchanger II, one path of the air outlet of the heat exchanger I is communicated with the air inlet of the atomizer I, and the other path of the air outlet of the heat exchanger I is communicated with the air inlet of the atomizer II after being converged with the air outlet of the air feeder; one path of air outlet of the heat exchanger II is communicated with the air inlet of the annular air injection pipeline, and the other path of air outlet of the heat exchanger II is communicated with the air inlet of the secondary dryer.
Further, the upper half part of the dryer is a cylinder, the lower half part of the dryer is a cone, the atomizer I is arranged at the top end of the inner side of the cylinder, the atomizer II is arranged on the inner side wall of the upper part of the cylinder, and the annular air injection pipeline is arranged on the inner side wall of the lower part of the cylinder.
Further, the atomizer II comprises a fixed end and a spray rod extending to the central position in the dryer, wherein the fixed end is arranged on the side wall of the dryer, and the fixed end is provided with a liquid inlet, an air inlet and an annular spray hole; the mixed liquid from the liquid storage tank II enters the spray boom through the liquid inlet and is sprayed out through a nozzle positioned at the end part of the spray boom; the air from the blower and the heat exchanger I enters through the air inlet, is sprayed out through the annular spray holes and the nozzles, and the powder particles falling onto the spray bars can be blown away by the air flow sprayed out through the annular spray holes.
Furthermore, the annular air injection pipeline is tightly arranged on the inner wall of the dryer, the annular air injection pipeline comprises an annular air inlet and a nozzle, the annular air inlet is communicated with an air outlet of the heat exchanger II through the pipeline, and the nozzle is rotationally fixed on the annular air injection pipeline and the fixed part is spherical, so that the air injection angle can be adjusted up and down.
Further, the mixer includes motor, air supply dish and blender, motor, air supply dish and blender are installed in same pivot, the motor is used for driving the rotation of air supply dish, motor and air supply dish are installed in the left side of mixer feed inlet, the right side at the mixer feed inlet is installed to the blender, and the discharge gate of blender and the powder entry intercommunication of secondary dryer.
Further, the motor is a variable frequency motor.
Further, the air supply surface of the air supply disc is provided with two integrated gradual change blades.
Further, the mixer is a rod pin type mixer, a plurality of rows of rod pins are arranged on the mixer, each row of rod pins consists of a plurality of round rods, the round rods on two adjacent rows of rod pins are arranged in a staggered mode, and the installation angle of each round rod of the rod pin of the rear row is just positioned between two round rods of the rod pin of the front row.
Furthermore, the injection pressure and the liquid inlet amount of the atomizer I and the atomizer II are adjustable.
Further, electric stirrers are arranged on the liquid storage tank I and the liquid storage tank II.
Further, the delivery pump I and the delivery pump II are respectively and independently peristaltic pumps or screw pumps.
Further, the cyclone separator is a wind scoop lengthened separator.
In addition, the invention also provides a method for carrying out on-line mixing and drying on the superfine powder by adopting the on-line drying and mixing system for the superfine powder.
The beneficial effects of the invention are as follows:
(1) By utilizing different powder atomization drying time differences, powder particles which are dried first are adsorbed and wrapped by powder atomization liquid which is dried slowly, so that different powder can be primarily mixed in an atomization drying stage, and the powder can be uniformly mixed before being dried for the second time, thereby achieving the purpose of on-line drying and mixing of the powder, saving the site, equipment investment and energy consumption and improving the production efficiency.
(2) Through setting up annular jet duct in the middle part in the desicator, can upwards spray dry hot air current with certain angle, form the turbulent flow in atomizer below region, can dry the atomizing liquid drop in the desicator, with powder granule roll, stir, make different powders further mix.
(3) The fixed end of the spray rod of the atomizer II is provided with an annular spray hole, and powder particles falling onto the spray rod can be blown away by air flow sprayed out of the annular spray hole, so that powder is prevented from being accumulated on the spray rod.
Drawings
Fig. 1 is a schematic structural diagram of an on-line drying and mixing system for ultrafine powder provided by the invention.
Fig. 2 is a schematic view of the internal structure of the atomizer ii.
Fig. 3 is a schematic cross-sectional view of an annular jet pipe.
Fig. 4 is a schematic cross-sectional structure of the mixer.
Fig. 5 is a schematic view of the structure of an internal blowing tray of the mixer.
Description of the reference numerals
1-a dryer; 2-an atomizer I; 3-atomizer II; 4-annular jet pipes; 5-a mixer; a 6-secondary dryer; 7-cyclone separator; 8A-a storage tank I; 8B-a storage tank II; 9-a liquid storage tank I; 10-a liquid storage tank II; 11-a blower; 12-heat exchanger I; 13-heat exchanger II; 14. 15, 16, 17A, 17B, 18A, 18B-piping; 19A, 19B-solenoid valves and flow controllers; 19C, 19D, 19E, 19F-solenoid valves and flow regulators; 20-an electric motor; 21-an air supply disc; 22-a mixer; 23-a liquid inlet; 24-air inlet; 25-annular spray holes; 26-spray bar; 27-an annular air inlet; 28-nozzles; 29-inner wall; 30A-a delivery pump I; 30B-a delivery pump II.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the system or apparatus referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the present invention, it is to be understood that the terms "I" and "II" are introduced for convenience of description to distinguish between identical elements at different locations.
As shown in FIG. 1, the superfine powder on-line drying and mixing system provided by the invention comprises an atomization drying device, a mixing drying device, a powder secondary collecting device, a liquid feeding device and an air inlet device; the atomization drying device comprises a dryer 1, wherein an atomizer I2 is arranged at the inner top end of the dryer 1, an atomizer II 3 and an annular air injection pipeline 4 are arranged on the inner side wall of the dryer, the atomizer II 3 is positioned below the atomizer I2, nozzle openings of the atomizer I2 and the atomizer II 3 are opposite to each other and keep a certain distance, and the annular air injection pipeline 4 is positioned below the atomizer II 3 and keeps a certain distance; the mixing and drying device comprises a mixer 5, a secondary dryer 6 and a storage tank I8A, wherein the mixer 5 is positioned below the dryer 1, a feed inlet of the mixer 5 is communicated with a bottom discharge outlet of the dryer 1, a discharge outlet of the mixer is communicated with a powder inlet of the secondary dryer 6, and a powder outlet of the secondary dryer 6 is communicated with the storage tank I8A; the powder secondary collection device comprises a cyclone separator 7 and a storage tank II 8B, wherein a feed inlet of the cyclone separator 7 is communicated with a gas outlet of the secondary dryer 6, the bottom of the cyclone separator 7 is communicated with the storage tank II 8B, and the top of the cyclone separator is communicated with the tail gas treatment system; the liquid conveying device comprises a liquid storage tank I9 and a liquid storage tank II 10; the liquid storage tank I9 is communicated with a liquid inlet of the atomizer I2 through a delivery pump I30A and a pipeline 14; the liquid storage tank II 10 is communicated with a liquid inlet of the atomizer II 3 through a delivery pump II 30B and a pipeline 15; the air inlet device comprises a blower 11, a heat exchanger I12 and a heat exchanger II 13; the air outlet of the air blower 11 is respectively communicated with the air inlets of the heat exchanger I12 and the heat exchanger II 13, one air outlet of the heat exchanger I12 is communicated with the air inlet of the atomizer I2 through a pipeline 16, and the other air outlet of the heat exchanger I12 is communicated with the air inlet of the atomizer II 3 through a pipeline 17B after being converged with an air outlet pipeline 17A of the air blower 11; one path of air outlet of the heat exchanger II 13 is communicated with the air inlet of the annular air injection pipeline 4 through a pipeline 18A, and the other path of air outlet of the heat exchanger II is communicated with the air inlet of the secondary dryer 6 through a pipeline 18B. The liquid storage tank I9 and the liquid storage tank II 10 are both preferably provided with electric stirrers.
According to a preferred embodiment of the present invention, as shown in fig. 1, the upper half part of the dryer 1 is a cylinder, the lower half part is a cone, the atomizer i 2 is mounted at the top end of the inner side of the cylinder, the atomizer ii 3 is mounted on the inner side wall of the upper part of the cylinder, and the annular air injection pipe 4 is mounted on the inner side wall of the lower part of the cylinder. Wherein the nozzles of the atomizers i 2 and ii 3 are preferably both in a central position within the dryer. The nozzle openings of the atomizer I2 and the atomizer II 3 are opposite, and the distance between the two openings can be 10 cm to 100cm. The annular air injection pipeline 4 is positioned below the atomizer II 3, and the distance between the annular air injection pipeline and the atomizer II is 30-150 cm. The atomizer I2 sprays the mixed liquid of powder a first, contact with the hot air current with higher temperature and dry in the twinkling of an eye, the mixed liquid of powder b is sprayed out to atomizer II 3, because the gas temperature that gets into atomizer II 3 is lower than the gas temperature that gets into atomizer I2, so the vaporific liquid drop drying time that atomizer II 3 sprayed compares vaporific liquid drop drying time that atomizer I2 sprayed out is long, utilize different powder atomization drying time differences, the powder granule of drying first is adsorbed by the powder atomized liquid of slower drying, parcel, realize preliminary mixing, preliminary mixed particle whereabouts is in annular jet pipe 4 position, because annular jet pipe 4 can spray the dry hot air current upwards with certain angle, form the turbulent flow in atomizer below region, realize the tumbling of powder granule when can dry the atomized liquid drop in the desicator, make different powder further mix.
The injection pressure and the liquid inlet amount of the atomizer I2 and the atomizer II 3 are adjustable. The method can be realized by the following steps: the pipeline 14 is provided with an electromagnetic valve and a flow controller 19A, and the pipeline 15 is provided with an electromagnetic valve and a flow controller 19B for adjusting the liquid inlet flow rate of the mixed liquid; the electromagnetic valve and the regulator 19C are installed on the pipeline 16, the electromagnetic valve and the regulator 19D are installed on the pipeline 17B, the electromagnetic valve and the regulator 19E are installed on the pipeline 18A, and the electromagnetic valve and the regulator 19F are installed on the pipeline 18B and are used for regulating the gas inlet flow rate.
According to a preferred embodiment of the present invention, as shown in fig. 2, the atomizer ii 3 includes a fixed end and a spray rod 26 extending to a central position in the dryer 1, the fixed end is disposed on a side wall of the dryer 1, and the fixed end is provided with a liquid inlet 23, an air inlet 24 and an annular spray hole 25; the mixed liquid from the liquid storage tank II 10 enters the spray rod 26 through the liquid inlet 23 and is sprayed out through a nozzle positioned at the end part of the spray rod 26; the air from the blower 11 and the heat exchanger i 12 enters through the air inlet 24, is ejected through the annular nozzle holes 25 and the nozzles, and the air ejected through the annular nozzle holes 25 can blow away the powder particles that have fallen onto the spray bars 26. In addition, the structure of the atomizer i 2 may be the same as that of the atomizer ii 3, but since the atomizer i 2 is located at the top of the dryer 1, the atomizer i 2 may not need to be provided with a spray rod and an annular spray hole, but only includes a liquid inlet, an air inlet and a nozzle, the mixed liquid from the liquid storage tank i 9 and the gas from the heat exchanger i 12 are sprayed from the nozzle through the liquid inlet and the air inlet, respectively, and the mixed liquid is instantaneously dried in contact with a hot air flow with a high temperature.
According to a preferred embodiment of the present invention, as shown in fig. 3, the annular air injection pipe 4 is tightly installed on the inner wall 29 of the dryer 1, the annular air injection pipe 4 includes an annular air inlet 27 and a nozzle 28, the annular air inlet 27 is communicated with the air outlet of the heat exchanger ii 13 through a pipe 18A, and the nozzle 28 is rotatably fixed to the annular air injection pipe 4 and the fixed part is spherical, so that the air injection angle can be adjusted up and down. After the high-temperature gas from the heat exchanger II 13 enters the annular air inlet 27 through the pipeline 18A, the dry hot air flow is ejected upwards at a certain angle through the nozzle 28 to form turbulent flow, so that atomized liquid drops in the dryer can be dried, powder particles can be rolled and stirred, and different powders can be further mixed. The jet angle of the nozzle 28 is preferably 15 to 75 °.
According to a preferred embodiment of the present invention, as shown in fig. 1, the mixer 5 includes a motor 20, a blower tray 21 and a mixer 22, the motor 20, the blower tray 21 and the mixer 22 are mounted on the same rotating shaft, the motor 20 is used for driving the blower tray 21 to rotate, the motor 20 and the blower tray 21 are mounted on the left side of a feed inlet of the mixer 5, the mixer 22 is mounted on the right side of the feed inlet of the mixer 5, and a discharge outlet of the mixer 22 is communicated with a powder inlet of the secondary dryer 6. Powder from the dryer 1 is sucked into the mixer 5 through the bottom of the dryer 1, pushed to the mixer 22 by the air supply disc 21, uniformly mixed under high-speed stirring of the mixer 22, then enters the secondary dryer 6, and further dried by hot air flow from the heat exchanger II 13. In addition, the mixer 5 further comprises a metal housing and a base, wherein the metal housing is coated on the outer sides of the motor 20, the air supply disc 21 and the mixer 22, and the base is used for fixing the motor 20, the air supply disc 21 and the mixer 22. The motor 20 may be a variable frequency motor. As shown in fig. 4, the air supply surface of the air supply disc 21 is preferably two integral progressive blades. As shown in fig. 5, the mixer 22 is preferably a pin-type mixer, on which a plurality of rows of pins are mounted, each row of pins is composed of a plurality of round bars, the round bars on two adjacent rows of pins are mounted in a staggered manner, and the mounting angle of each round bar of the next row of pins is just located between two round bars of the previous row of pins, which is more favorable for mixing different powders and obtains better mixing effect.
The secondary dryer 6 is a funnel-shaped container, the left side of the secondary dryer 6 is communicated with the mixer 5, the top is provided with a hot air inlet device which is connected with a pipeline 18B for inputting dry hot air, the right side of the lower end is connected with the cyclone separator 7, and the lowest end is a discharge hole which is communicated with the storage tank I8A. The powder from the mixer 5 is subjected to secondary drying in a secondary dryer 6, the powder after secondary drying is discharged into a storage tank I8A through the lower end of the secondary dryer 6, and the residual powder enters a cyclone separator 7 along with air flow for secondary collection.
The liquid conveying device is provided with two sets of liquid storage tanks and conveying pumps. The electric stirrer is preferably arranged on each of the liquid storage tank I9 and the liquid storage tank II 10, so that the mixed liquid is prevented from precipitating, and the powder is more favorably dispersed in the solution to obtain uniform mixed atomized liquid. The delivery pump I30A and the delivery pump II 30B may each independently be peristaltic or progressive cavity pumps.
The air inlet device is provided with two sets of heat exchangers, the heating temperature of the heat exchanger I12 and the heating temperature of the heat exchanger II 13 can be independently regulated, hot air output from the heat exchanger I12 enters the atomizer I12 through a pipeline 16, hot air output from the heat exchanger I12 enters the atomizer II 3 through mixing with room temperature air input from a pipeline 17A to be regulated into air flow with slightly lower temperature, hot air output from the heat exchanger II 13 enters the dryer 1 through a pipeline 18A and an annular air injection pipeline 4, and enters the secondary dryer 6 through a pipeline 18B, and the drying temperature of different sections inside the dryer 1 can be regulated through the two sets of independent heat exchangers.
The cyclone 7 is used for collecting residual powder in the airflow, the left side of the cyclone 7 is connected with the secondary dryer 6, the lower end of the cyclone is communicated with the storage tank II 8B, and the top of the cyclone is connected with the tail gas treatment system through a pipeline. The cyclone separator 7 is preferably a wind scoop extension type separator.
During operation, the liquid storage tank I9 is filled with the mixed solution of the a ultrafine powder and is stirred at a constant speed by starting the electric stirrer, the liquid storage tank II 10 is filled with the mixed solution of the B ultrafine powder and is stirred at a constant speed by starting the electric stirrer, the mixer 5 is started, the blower 11 is started to supply air to the heat exchanger I12, the heat exchanger II 13 and the pipeline 17A, the hot air output from the heat exchanger I12 enters the atomizer I2 through the pipeline 16 after the flow rate and the pressure are regulated by the regulator 19C, the hot air is mixed with the normal-temperature air conveyed by the pipeline 17A into a lower-temperature air flow through the pipeline 17B and enters the atomizer II 3, and the hot air output from the heat exchanger II 13 enters the annular air injection pipeline 4 after the flow rate and the pressure are regulated by the regulator 19E and enters the secondary dryer 6 after the flow rate and the pressure are regulated by the regulator 19F. After the interior of the dryer 1 and the secondary dryer 6 reach the set temperature, a conveying pump I30A and a conveying pump II 30B are started in sequence according to the set time difference, a powder mixed liquid a and B are conveyed to an atomizer I2 and an atomizer II 3 respectively, the powder mixed liquid a is sprayed out of the atomizer I2 firstly, the powder mixed liquid B is instantly dried by contacting with hot air with higher temperature, the powder mixed liquid B is sprayed out of the atomizer II 3, the drying time of mist droplets sprayed out of the atomizer II 3 is longer than the drying time of mist droplets sprayed out of the atomizer I2 because the air temperature entering the atomizer II 3 from a pipeline 17B is lower than the air temperature entering the dryer 2 from a pipeline 16, and when the mist droplets sprayed out of the atomizer I2 are dried into powder particles a and then fall above the atomizer II 3 by adjusting the flow rate and the drying interval temperature of the two powder mixed liquids, spraying atomized liquid drops of mixed powder liquid B by an atomizer II 3, wrapping and adsorbing powder particles a by the atomized liquid drops to achieve a primary mixing effect, contacting the atomized liquid drops with hot air flow sprayed by an annular air injection pipeline 4 in the middle part in a dryer 1 in the falling process, rapidly drying the atomized liquid drops into powder particles, wrapping and rolling the dried powder particles by turbulent air flow, stirring the powder particles further, sucking the powder particles into a mixer 5 through the lower end of the dryer, pushing the powder particles to a mixer 22 by an air supply disc 21, uniformly mixing the powder particles, entering a secondary dryer 6, further drying the uniformly mixed powder by hot air flow input from a pipeline 18B, enabling most of mixed powder after secondary drying to enter a storage tank I8A, enabling residual powder to enter a cyclone separator 7 along with the air flow to be subjected to secondary collection, enabling the secondarily collected powder to enter a storage tank II 8B, the tail gas is sent to a tail gas treatment system through a top pipeline.
In addition, the invention also provides a method for carrying out on-line mixing and drying on the superfine powder by adopting the on-line drying and mixing system for the superfine powder. Specifically, after the mixed solution of the a ultrafine powder and the mixed solution of the B ultrafine powder are uniformly stirred by a liquid storage tank I9 and a liquid storage tank II 10 respectively, a conveying pump I30A and a conveying pump II 30B are started according to a set time difference, the mixed solution of the a powder and the B powder is conveyed to an atomizer I2 and an atomizer II 3 respectively, the atomizer I2 firstly sprays the mixed solution of the a powder, the mixed solution of the a powder and the mixed solution of the B powder are contacted with hot air with higher temperature to be instantly dried into a powder particle, the atomizer II 3 sprays atomized liquid drops of the mixed solution of the B powder and contacts with hot air with lower temperature, the hot air is sprayed by an annular air spraying pipeline 4, the mixed powder particle dried by the dryer 1 enters into a secondary dryer 6 after being mixed by a hot air flow from a heat exchanger II 13 to be secondarily dried, most of the mixed powder after being secondarily dried is deposited into a storage tank I8A, residual powder enters into a cyclone 7 along with the air flow to be secondarily collected, the secondarily collected powder enters into the storage tank II 8B, and tail gas is sent to a tail gas treatment system through a top pipeline.
The difference in activation time between the delivery pump I30A and the delivery pump II 30B is preferably 0.5 to 5 seconds.
The flow rate of the powder mixed solution a fed into the atomizer I2 is preferably 50-500 mL/min. The flow rate of the powder mixed solution b fed into the atomizer II 3 is preferably 50-500 mL/min. The particle diameters of the powder a and the powder b are preferably 0.1 to 50 μm independently of each other.
The temperature of the hot gas stream introduced into the atomizer I2 is preferably from 100 to 300℃and the flow rate is preferably from 10 to 1000L/min. The temperature of the hot air flow introduced into the atomizer II 3 is preferably 60-250 ℃, and the flow rate is preferably 10-1000L/min. The temperature of the hot air flow introduced into the annular jet pipe 4 is preferably 100-300 ℃, and the flow rate is preferably 100-5000L/min. The temperature of the hot gas stream introduced into the secondary dryer 6 is preferably 100 to 300℃and the flow rate is preferably 100 to 5000L/min.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (9)
1. The superfine powder on-line drying and mixing system is characterized by comprising an atomization drying device, a mixing drying device, a powder secondary collecting device, a liquid feeding device and an air inlet device;
the atomization drying device comprises a dryer (1), wherein an atomizer I (2) is arranged at the inner top end of the dryer (1), an atomizer II (3) and an annular air injection pipeline (4) are arranged on the inner side wall of the dryer, the atomizer II (3) is positioned below the atomizer I (2), nozzle openings of the atomizer I (2) and the atomizer II (3) are opposite to each other and keep a certain distance, and the annular air injection pipeline (4) is positioned below the atomizer II (3) and keeps a certain distance;
the mixing and drying device comprises a mixer (5), a secondary dryer (6) and a storage tank I (8A), wherein the mixer (5) is positioned below the dryer (1), a feed inlet of the mixer (5) is communicated with a bottom discharge outlet of the dryer (1) and a discharge outlet of the mixer is communicated with a powder inlet of the secondary dryer (6), and a powder outlet of the secondary dryer (6) is communicated with the storage tank I (8A);
the powder secondary collection device comprises a cyclone separator (7) and a storage tank II (8B), wherein a feed inlet of the cyclone separator (7) is communicated with a gas outlet of a secondary dryer (6), the bottom of the cyclone separator (7) is communicated with the storage tank II (8B), and the top of the cyclone separator is communicated with a tail gas treatment system;
the liquid conveying device comprises a liquid storage tank I (9) and a liquid storage tank II (10); the liquid storage tank I (9) is communicated with a liquid inlet of the atomizer I (2) through a delivery pump I (30A) and a pipeline (14); the liquid storage tank II (10) is communicated with a liquid inlet of the atomizer II (3) through a conveying pump II (30B) and a pipeline (15);
the air inlet device comprises a blower (11), a heat exchanger I (12) and a heat exchanger II (13); the air outlet of the air feeder (11) is respectively communicated with the air inlets of the heat exchanger I (12) and the heat exchanger II (13), one path of the air outlet of the heat exchanger I (12) is communicated with the air inlet of the atomizer I (2), and the other path of the air outlet of the heat exchanger I is communicated with the air inlet of the atomizer II (3) after being converged with the air outlet of the air feeder (11); one path of air outlet of the heat exchanger II (13) is communicated with the air inlet of the annular air injection pipeline (4), and the other path of air outlet of the heat exchanger II is communicated with the air inlet of the secondary dryer (6).
2. The ultra-fine powder on-line drying and mixing system according to claim 1, wherein the upper half part of the dryer (1) is a cylinder, the lower half part is a cone, the atomizer i (2) is mounted on the top end of the inner side of the cylinder, the atomizer ii (3) is mounted on the inner side wall of the upper part of the cylinder, and the annular air injection pipeline (4) is mounted on the inner side wall of the lower part of the cylinder.
3. The ultra-fine powder on-line drying and mixing system according to claim 1, wherein the annular air injection pipeline (4) is tightly installed on the inner wall (29) of the dryer (1), the annular air injection pipeline (4) comprises an annular air inlet (27) and a nozzle (28), the annular air inlet (27) is communicated with an air outlet of the heat exchanger II (13) through a pipeline (18A), and the nozzle (28) is rotationally fixed on the annular air injection pipeline (4) and the fixed part is spherical, so that the air injection angle can be adjusted up and down.
4. The ultra-fine powder on-line drying and mixing system according to any one of claims 1 to 3, wherein the mixer (5) comprises a motor (20), an air supply disc (21) and a mixer (22), the motor (20), the air supply disc (21) and the mixer (22) are arranged on the same rotating shaft, the motor (20) is used for driving the air supply disc (21) to rotate, the motor (20) and the air supply disc (21) are arranged on the left side of a feed inlet of the mixer (5), the mixer (22) is arranged on the right side of the feed inlet of the mixer (5), and a discharge outlet of the mixer (22) is communicated with a powder inlet of the secondary dryer (6); the motor (20) is a variable frequency motor; the air supply surface of the air supply disc (21) is provided with two integrated gradual change blades; the mixer (22) is a rod pin type mixer, a plurality of rows of rod pins are arranged on the mixer, each row of rod pins consists of a plurality of round rods, the round rods on two adjacent rows of rod pins are arranged in a staggered mode, and the installation angle of each round rod of the rod pin of the rear row is just positioned between two round rods of the rod pin of the front row.
5. The ultra-fine powder on-line drying and mixing system according to any one of claims 1 to 3, wherein the spray pressure and the liquid inlet amount of the atomizer i (2) and the atomizer ii (3) are adjustable.
6. The ultra-fine powder on-line drying and mixing system according to any one of claims 1 to 3, wherein the liquid storage tank i (9) and the liquid storage tank ii (10) are both provided with electric agitators.
7. The ultra-fine powder on-line drying and mixing system according to any one of claims 1 to 3, wherein the delivery pump i (30A) and the delivery pump ii (30B) are each independently peristaltic pump or screw pump.
8. An on-line ultra-fine powder drying and mixing system according to any one of claims 1 to 3, wherein the cyclone separator (7) is a wind scoop extension type separator.
9. An on-line mixing and drying method for superfine powder by adopting the on-line drying and mixing system for superfine powder according to any one of claims 1 to 8.
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| CN115121190B (en) * | 2022-06-16 | 2024-04-26 | 中国恩菲工程技术有限公司 | Superfine powder preparation device and method |
| CN115429997A (en) * | 2022-08-17 | 2022-12-06 | 首都医科大学附属北京朝阳医院 | Device for invasive mechanical ventilation and machine withdrawing method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2786479A1 (en) * | 1998-11-26 | 2000-06-02 | Commissariat Energie Atomique | PREPARATION BY ATOMIZATION-DRYING OF A CASTABLE POWDER OF URANIUM BIOXIDE OBTAINED BY DRY CONVERSION OF UF6 |
| JP2002224603A (en) * | 2001-01-31 | 2002-08-13 | Riso Kagaku Corp | Drawing equipment |
| CN101588811A (en) * | 2006-12-22 | 2009-11-25 | 沃泰克斯药物股份有限公司 | Fluidization and spray-drying |
| CN102250641A (en) * | 2010-05-17 | 2011-11-23 | 宁波科元塑胶有限公司 | Method and apparatus for preparing ethylene and propylene with maximized yield |
| CN105135827A (en) * | 2015-10-08 | 2015-12-09 | 黑龙江源鼎科技开发有限公司 | Thermal-cycle pressure spray drying tower |
| CN105698512A (en) * | 2016-01-23 | 2016-06-22 | 江西理工大学 | Spray drying system |
| CN209237365U (en) * | 2018-12-13 | 2019-08-13 | 安徽谓博中药股份有限公司 | A traditional Chinese medicine spray drying system |
| CN209885268U (en) * | 2019-03-13 | 2020-01-03 | 中国林业科学研究院林产化学工业研究所 | Ultrasonic airflow combined spray drying device |
| CN110743465A (en) * | 2019-11-04 | 2020-02-04 | 魏砚广 | Spray granulation desiccator |
| CN212619686U (en) * | 2020-05-19 | 2021-02-26 | 厦门高容纳米新材料科技有限公司 | Online drying and mixing system for superfine powder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7731100B2 (en) * | 2008-08-12 | 2010-06-08 | Walsh Jr William Arthur | Joining the mixing and variable gas atomizing of reactive chemicals in flue gas cleaning systems for removal of sulfur oxides, nitrogen oxides and mercury |
-
2020
- 2020-05-19 CN CN202010422533.4A patent/CN111457677B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2786479A1 (en) * | 1998-11-26 | 2000-06-02 | Commissariat Energie Atomique | PREPARATION BY ATOMIZATION-DRYING OF A CASTABLE POWDER OF URANIUM BIOXIDE OBTAINED BY DRY CONVERSION OF UF6 |
| JP2002224603A (en) * | 2001-01-31 | 2002-08-13 | Riso Kagaku Corp | Drawing equipment |
| CN101588811A (en) * | 2006-12-22 | 2009-11-25 | 沃泰克斯药物股份有限公司 | Fluidization and spray-drying |
| CN102250641A (en) * | 2010-05-17 | 2011-11-23 | 宁波科元塑胶有限公司 | Method and apparatus for preparing ethylene and propylene with maximized yield |
| CN105135827A (en) * | 2015-10-08 | 2015-12-09 | 黑龙江源鼎科技开发有限公司 | Thermal-cycle pressure spray drying tower |
| CN105698512A (en) * | 2016-01-23 | 2016-06-22 | 江西理工大学 | Spray drying system |
| CN209237365U (en) * | 2018-12-13 | 2019-08-13 | 安徽谓博中药股份有限公司 | A traditional Chinese medicine spray drying system |
| CN209885268U (en) * | 2019-03-13 | 2020-01-03 | 中国林业科学研究院林产化学工业研究所 | Ultrasonic airflow combined spray drying device |
| CN110743465A (en) * | 2019-11-04 | 2020-02-04 | 魏砚广 | Spray granulation desiccator |
| CN212619686U (en) * | 2020-05-19 | 2021-02-26 | 厦门高容纳米新材料科技有限公司 | Online drying and mixing system for superfine powder |
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