CN209893810U - Nanometer calcium carbonate powder drying system - Google Patents
Nanometer calcium carbonate powder drying system Download PDFInfo
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- CN209893810U CN209893810U CN201920605737.4U CN201920605737U CN209893810U CN 209893810 U CN209893810 U CN 209893810U CN 201920605737 U CN201920605737 U CN 201920605737U CN 209893810 U CN209893810 U CN 209893810U
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- dryer
- calcium carbonate
- hollow
- wall
- carbonate powder
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 104
- 239000000843 powder Substances 0.000 title claims abstract description 71
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 52
- 238000001035 drying Methods 0.000 title claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000001704 evaporation Methods 0.000 claims abstract description 8
- 230000008020 evaporation Effects 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 239000000428 dust Substances 0.000 claims abstract description 5
- 238000005054 agglomeration Methods 0.000 claims abstract description 4
- 230000002776 aggregation Effects 0.000 claims abstract description 4
- 238000012856 packing Methods 0.000 claims abstract 2
- 230000000903 blocking effect Effects 0.000 claims description 53
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 6
- 239000003610 charcoal Substances 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 239000011496 polyurethane foam Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 241000628997 Flos Species 0.000 claims 2
- 239000011521 glass Substances 0.000 claims 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000004888 barrier function Effects 0.000 description 7
- 229920000742 Cotton Polymers 0.000 description 2
- 230000010405 clearance mechanism Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
A nanometer calcium carbonate powder drying system comprises a double-blade dryer and a flash evaporation dryer which are sequentially connected; the double-blade dryer comprises a dryer shell, two hollow stirring shafts arranged in parallel, a plurality of hollow blades arranged on the hollow stirring shafts, a rotary joint communicated with hot steam, a transmission mechanism, a nano calcium carbonate powder inlet, a nano calcium carbonate powder outlet and a support frame; the flash evaporation dryer comprises a dryer, a blower and an air heater which are arranged on one side of the bottom of the dryer, a crushing stirrer arranged on the lower portion of the dryer, a feeding hole which is arranged in the middle of the dryer and communicated with a nano calcium carbonate powder outlet through a packing auger conveyor, and a cyclone separator, a bag-type dust collector and a draught fan which are sequentially communicated with the top of the dryer through pipelines. The system improves the heating efficiency of the dryer, reduces the working noise, can obviously inhibit the agglomeration phenomenon of the nano calcium carbonate powder during the actual production, and improves the quality of the nano calcium carbonate powder.
Description
Technical Field
The utility model relates to a nanometer calcium carbonate powder drying equipment field, concretely relates to nanometer calcium carbonate powder drying system.
Background
The existing nano calcium carbonate powder drying system usually has the defects of low drying efficiency and easy agglomeration of nano calcium carbonate powder, and further influences the quality of the produced nano calcium carbonate powder.
Disclosure of Invention
The utility model aims at providing a nanometer calcium carbonate powder drying system to present defect.
A nanometer calcium carbonate powder drying system comprises a double-blade dryer and a flash evaporation dryer which are sequentially connected;
the double-paddle dryer comprises a dryer shell, two hollow stirring shafts arranged in parallel, a plurality of hollow paddles arranged on the hollow stirring shafts, a rotary joint communicated with hot steam, a transmission mechanism, a nano calcium carbonate powder inlet, a nano calcium carbonate powder outlet and a support frame, wherein the hollow stirring shafts are rotatably arranged in an inner cavity of the shell and are composed of an upper shell cover and a lower shell body which are matched with each other, a steam heating sleeve is arranged on the outer wall of the lower shell body, the plurality of hollow paddles on the hollow stirring shafts are radially arranged in a spiral line broken line shape, a steam inlet pipe is arranged in the hollow stirring shafts along the axis of the hollow stirring shafts, a steam conduit leading to the inner cavity of each hollow paddle is arranged on the steam inlet pipe, the outlet end of the steam conduit is close to the inner wall of the hollow paddle, and both end parts of the hollow, the hollow stirring shaft is communicated with the inner cavity of the hollow blade; the end part of the flow guide through hole, which is positioned in the inner cavity of the hollow stirring shaft, is fixedly connected with a backflow prevention pipe, two radial flow baffles are arranged in each hollow blade and positioned on the outer wall of the hollow stirring shaft, and one radial flow baffle is arranged between each two flow guide through holes and the steam guide pipe; the inner wall of the lower shell is inwards protruded to form a plurality of groups of arc-shaped protrusions, and the length of each arc-shaped protrusion is the same as that of the lower shell; the outer surface of the steam heating sleeve is provided with a metal outer cover, a heat-insulating sound-insulating cavity is formed between the metal outer cover and the outer surface of the steam heating sleeve, a glass fiber cotton layer, a particle rubber layer, a charcoal fiber layer and a polyurethane foam layer are sequentially filled in the heat-insulating sound-insulating cavity from inside to outside, and the glass fiber cotton layer, the particle rubber layer, the charcoal fiber layer and the polyurethane foam layer are fixedly bonded through an adhesive;
the flash evaporation dryer comprises a dryer, a blower and an air heater which are arranged on one side of the bottom of the dryer, a crushing stirrer arranged on the lower portion of the dryer, a feed inlet which is arranged in the middle of the dryer and communicated with a nano calcium carbonate powder outlet through an auger conveyor, and a cyclone separator, a bag-type dust collector and a draught fan which are sequentially communicated with the top of the dryer through pipelines, wherein the dryer is of a cylindrical structure, an agglomerated powder blocking mechanism is arranged on the upper portion of the inner wall of a dryer cavity, and a wall-hanging powder removing mechanism is arranged on the outer wall of the dryer and below the agglomerated powder blocking mechanism; the agglomerated powder blocking mechanism comprises a first circular blocking plate, a plurality of circular through holes arranged on the first circular blocking plate, and a second circular blocking plate which is arranged above the circular through holes and fixedly connected and supported with the first circular blocking plate through two vertical rods, wherein the diameter of the first circular blocking plate is smaller than the inner diameter of the dryer, the first circular blocking plate is radially provided with a plurality of horizontal rods fixedly connected with the inner wall of a dryer chamber, an annular blocking plate fixedly connected with the inner wall of the dryer chamber is arranged right above the horizontal rods, and the annular width of the annular blocking plate is slightly larger than the length of the horizontal rods; the wall-mounted powder removing mechanism is characterized in that the wall-mounted powder removing mechanism is four bin wall vibrators evenly arranged on the outer wall of the dryer along the circumferential direction, four rectangular plates are fixedly connected to the outer wall of the dryer, and one bin wall vibrator is detachably mounted on each rectangular plate.
The distance between the outlet end of the steam conduit and the inner wall of the hollow blade is 20-40 mm.
The height of the radial flow baffle is one fifth of that of the inner cavity of the hollow blade.
The hollow blades on the two hollow stirring shafts are arranged in an interpenetration manner, and the two hollow stirring shafts are driven by gears.
The circular through holes are uniformly distributed on the first circular blocking plate, and the diameter of the second circular blocking plate is larger than that of the circular through holes.
The surfaces of the first circular blocking plate, the second circular blocking plate and the annular blocking plate are coated with high-temperature wear-resistant ceramic paint.
The rectangular plate is welded with the outer wall of the dryer through a plurality of horizontal pipes, and the rectangular plate is provided with a bin wall vibrator mounting hole so as to realize the mounting and dismounting of the bin wall vibrator.
The utility model discloses the advantage of device: the two water conservancy diversion perforating holes that set up are established with the both ends of hollow blade junction on the hollow stirring shaft to the comdenstion water in this device hollow blade, in time discharges the comdenstion water, and the comdenstion water can be followed hollow blade both ends discharge and is showing improvement heating efficiency during hollow blade rotates. Meanwhile, the outer cover for heat preservation and sound insulation is additionally arranged on the steam heating sleeve of the lower shell of the dryer, so that the heating efficiency of the nano calcium carbonate powder dryer is improved, and the working noise is reduced. Through first circular barrier plate, the circular barrier plate of second and cyclic annular barrier plate blocks the nanometer calcium carbonate reunion powder of great piece and rises, make it fall into the desicator lower part again by broken mixer recrushing, the condition of partial wall built-up can appear after the nanometer calcium carbonate reunion powder of great piece is blockked, add the wall built-up powder clearance mechanism and pat the wall built-up powder and fall down this moment, can show the reunion phenomenon that restraines the nanometer calcium carbonate powder when actual production, promote the quality of nanometer calcium carbonate powder.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the interior of the dryer housing;
FIG. 3 is a schematic diagram of the construction of the steam heating jacket and the metal outer cover;
FIG. 4 is a schematic structural view of a hollow stirring shaft and hollow blades;
FIG. 5 is a schematic structural view of the interior of the heat-insulating and sound-insulating cavity;
FIG. 6 is a schematic structural view of a first circular blocking plate;
FIG. 7 is a schematic structural view of an annular barrier plate;
FIG. 8 is a schematic structural view of a second circular blocking plate;
FIG. 9 is a schematic view of the construction of a wall-mounted powder removal mechanism;
FIG. 10 is a schematic view of the installation of the silo wall vibrator.
Detailed Description
As shown in the attached drawing, a nano calcium carbonate powder drying system comprises a double-blade dryer and a flash evaporation dryer which are sequentially connected;
the double-paddle dryer comprises a dryer shell, two hollow stirring shafts 1 arranged in parallel, a plurality of hollow paddles 2 arranged on the hollow stirring shafts 1, a rotary joint 3 communicated with hot steam, a transmission mechanism, a nano calcium carbonate powder inlet 4, a nano calcium carbonate powder outlet 5 and a support frame, wherein the hollow stirring shafts 1 are rotatably arranged in an inner cavity of the shell, the shell consists of an upper shell cover 6 and a lower shell body 7 which are matched, a steam heating sleeve 8 is arranged on the outer wall of the lower shell body 7, the hollow paddles 2 on the hollow stirring shafts 1 are radially arranged in a spiral line broken line shape, a steam inlet pipe 9 is arranged in the hollow stirring shafts 1 along the axial lines of the hollow stirring shafts, a steam guide pipe 10 leading to the inner cavity of each hollow paddle 2 is arranged on the steam inlet pipe 9, the outlet end of the steam guide pipe 10 is close to the inner wall of the hollow paddle 2, and a flow guide through hole 11 is arranged at the two end, the inner cavities of the hollow stirring shaft 1 and the hollow blade 2 are communicated; the end part of the flow guide through hole 11 positioned in the inner cavity of the hollow stirring shaft 1 is fixedly connected with an anti-return pipe 12, two radial flow baffles 13 are arranged in each hollow blade 2 and positioned on the outer wall of the hollow stirring shaft 1, and one radial flow baffle 13 is arranged between each two flow guide through holes 11 and the steam guide pipe 10; the inner wall of the lower shell 7 protrudes inwards to form a plurality of groups of arc-shaped protruding parts 14, and the length of each arc-shaped protruding part 14 is the same as that of the lower shell 7; the outer surface of the steam heating sleeve 8 is provided with a metal outer cover 15, a heat-insulating sound-insulating cavity 16 is formed between the metal outer cover 15 and the outer surface of the steam heating sleeve 8, a glass wool layer 17, a particle rubber layer 18, a charcoal fiber layer 19 and a polyurethane foam layer 20 are sequentially filled in the heat-insulating sound-insulating cavity 16 from inside to outside, and the glass wool layer 17, the particle rubber layer 18, the charcoal fiber layer 19 and the polyurethane foam layer 20 are fixedly bonded through an adhesive;
the flash evaporation dryer comprises a dryer 31, a blower 32 and an air heater 33 which are arranged on one side of the bottom of the dryer 31, a crushing stirrer 34 arranged on the lower portion of the dryer 31, a feed inlet 35 which is arranged in the middle of the dryer 31 and communicated with the nano calcium carbonate powder outlet 5 through an auger conveyor, and a cyclone separator 36, a bag-type dust collector 37 and an induced draft fan 38 which are sequentially communicated with the top of the dryer 31 through pipelines, wherein the dryer 31 is of a cylindrical structure, an agglomerated powder blocking mechanism 137 is arranged on the upper portion of the inner wall of a chamber of the dryer 31, and a wall-hanging powder removing mechanism 138 is arranged on the outer wall of the dryer 31 and below the agglomerated powder blocking mechanism 137; the agglomerated powder blocking mechanism 137 comprises a first circular blocking plate 39, a plurality of circular through holes 40 arranged on the first circular blocking plate 39, and a second circular blocking plate 42 which is arranged above the circular through holes 40 and fixedly connected with the first circular blocking plate 39 through two vertical rods 41 for supporting, wherein the diameter of the first circular blocking plate 39 is smaller than the inner diameter of the dryer 31, the first circular blocking plate 39 is provided with a plurality of horizontal rods 43 fixedly connected with the inner wall of the chamber of the dryer 31 along the radial direction of the first circular blocking plate 39, an annular blocking plate 46 fixedly connected with the inner wall of the chamber of the dryer 31 is arranged right above the plurality of horizontal rods 43, and the annular width of the annular blocking plate 46 is slightly larger than the length of the horizontal rods 43; the wall-hanging powder removing mechanism 138 is four bin wall vibrators 44 evenly arranged on the outer wall of the dryer 31 along the circumferential direction, four rectangular plates 45 are fixedly connected to the outer wall of the dryer 31, and one bin wall vibrator 44 is detachably mounted on each rectangular plate 45.
The distance between the outlet end of the steam conduit 10 and the inner wall of the hollow blade 2 is 20-40 mm.
The height of the radial flow baffle 13 is one fifth of the height of the inner cavity of the hollow blade 2.
The hollow blades 2 on the two hollow stirring shafts 1 are arranged in an interpenetration mode, and the two hollow stirring shafts 1 are in transmission through gears.
The plurality of circular through holes 40 are uniformly distributed on the first circular blocking plate 39, and the diameter of the second circular blocking plate 42 is larger than that of the circular through holes 40.
The surfaces of the first circular blocking plate 39, the second circular blocking plate 42 and the annular blocking plate 46 are coated with high-temperature wear-resistant ceramic paint.
The rectangular plate 45 is welded with the outer wall of the dryer 31 through a plurality of horizontal pipes 47, and bin wall vibrator mounting holes are formed in the rectangular plate 45, so that the bin wall vibrators 44 can be mounted and dismounted.
The working mode principle is as follows: firstly, let in high temperature steam in hollow stirring shaft 1 and the steam heating cover 8, then from nanometer calcium carbonate powder import 4 add the nanometer calcium carbonate powder of treating drying, the drive arrangement who starts the desiccator drives two hollow stirring shaft 1 rotations through drive mechanism, discharge from nanometer calcium carbonate powder export 5 after the nanometer calcium carbonate powder is preliminary dry, the comdenstion water in the hollow paddle 2 is established two water conservancy diversion perforating holes 11 that set up through hollow stirring shaft 1 and hollow paddle 2 junction's both ends and is in time discharged the comdenstion water, the comdenstion water can be showing improvement heating efficiency from hollow paddle 2 both ends discharge during hollow paddle 2 rotates, simultaneously, the steam heating cover 8 of casing 7 has installed heat preservation syllable-dividing metal dustcoat 15 under the desiccator additional, the heating efficiency of nanometer calcium carbonate powder desiccator is improved, the operating noise is reduced. When the nano calcium carbonate powder is primarily dried and then discharged from the nano calcium carbonate powder outlet 5, starting the induced draft fan 38, starting the air feeder 32 and the heater 33 again, enabling the dryer 31 to operate under a micro negative pressure, after the temperature in the dryer 31 rises to the working temperature, adding the primarily dried nano calcium carbonate powder into the dryer 31 from the feed inlet 35 through the auger conveyor, simultaneously starting the crushing stirrer 34, blocking and rising larger nano calcium carbonate agglomerated particles existing in the crushed nano calcium carbonate powder through the first circular barrier plate 39, the second circular barrier plate 42 and the annular barrier plate 46 to enable the larger nano calcium carbonate agglomerated particles to fall into the lower part of the dryer again and be repeatedly crushed by the crushing stirrer 34, and directly taking away the unagglomerated nano calcium carbonate powder by air flow to enter the cyclone separator 36 and the bag-type dust collector 37; the condition of partial wall built-up can appear after great block nanometer calcium carbonate reunion powder is blockked, adds the wall built-up powder clearance mechanism and beats the wall built-up powder and fall down this moment, can show the reunion phenomenon of inhibiting nanometer calcium carbonate powder when actual production, promotes the quality of nanometer calcium carbonate powder.
Claims (7)
1. A nano calcium carbonate powder drying system comprises a double-blade dryer and a flash evaporation dryer which are connected in sequence, and is characterized in that,
the double-paddle dryer comprises a dryer shell, two hollow stirring shafts (1) arranged in parallel, a plurality of hollow paddles (2) arranged on the hollow stirring shafts (1), a rotary joint (3) communicated with hot steam, a transmission mechanism, a nano calcium carbonate powder inlet (4), a nano calcium carbonate powder outlet (5) and a support frame, wherein the hollow stirring shafts (1) are rotatably arranged in the inner cavity of the shell, the shell consists of an upper shell cover (6) and a lower shell body (7) which are matched with each other, a steam heating sleeve (8) is arranged on the outer wall of the lower shell body (7), the plurality of hollow paddles (2) on the hollow stirring shafts (1) are radially arranged in a spiral line broken line shape, a steam inlet pipe (9) is arranged in the hollow stirring shafts (1) along the axis of the hollow stirring shafts, and a steam guide pipe (10) leading to the inner cavity of each hollow paddle (2) is arranged on, the outlet end of the steam conduit (10) is close to the inner wall of the hollow blade (2), and two end parts of the joint of the hollow stirring shaft (1) and the hollow blade (2) are respectively provided with a flow guide through hole (11), so that the hollow stirring shaft (1) is communicated with the inner cavity of the hollow blade (2); the end part of the flow guide through hole (11) positioned in the inner cavity of the hollow stirring shaft (1) is fixedly connected with an anti-return pipe (12), two radial flow baffle plates (13) are arranged in each hollow blade (2) and on the outer wall of the hollow stirring shaft (1), and one radial flow baffle plate (13) is arranged between each two flow guide through holes (11) and the steam guide pipe (10); the inner wall of the lower shell (7) protrudes inwards to form a plurality of groups of arc-shaped protruding parts (14), and the length of each arc-shaped protruding part (14) is the same as that of the lower shell (7); the outer surface of the steam heating sleeve (8) is provided with a metal outer cover (15), a heat-insulating sound-insulating cavity (16) is formed between the metal outer cover (15) and the outer surface of the steam heating sleeve (8), a glass silk floss layer (17), a particle rubber layer (18), a charcoal fiber layer (19) and a polyurethane foam layer (20) are sequentially filled in the heat-insulating sound-insulating cavity (16) from inside to outside, and the glass silk floss layer (17), the particle rubber layer (18), the charcoal fiber layer (19) and the polyurethane foam layer (20) are fixedly bonded through an adhesive;
the flash evaporation dryer comprises a dryer (31), a blower (32) and an air heater (33) which are arranged on one side of the bottom of the dryer (31), a crushing stirrer (34) which is arranged on the lower portion of the dryer (31), a feed inlet (35) which is arranged in the middle of the dryer (31) and communicated with a nano calcium carbonate powder outlet (5) through a packing auger conveyor, and a cyclone separator (36), a cloth bag dust collector (37) and a draught fan (38) which are sequentially communicated with the top of the dryer (31) through pipelines, wherein the dryer (31) is of a cylindrical structure, an agglomeration powder blocking mechanism (137) is arranged on the upper portion of the inner wall of a cavity of the dryer (31), and a wall-hanging powder removing mechanism (138) is arranged on the outer wall of the dryer (31) and below the agglomeration powder blocking mechanism (137); the agglomerated powder blocking mechanism (137) comprises a first circular blocking plate (39), a plurality of circular through holes (40) formed in the first circular blocking plate (39), and a second circular blocking plate (42) which is arranged above the circular through holes (40) and fixedly connected with the first circular blocking plate (39) through two vertical rods (41) for supporting, wherein the diameter of the first circular blocking plate (39) is smaller than the inner diameter of the dryer (31), the first circular blocking plate (39) is provided with a plurality of horizontal rods (43) fixedly connected with the inner wall of a chamber of the dryer (31) along the radial direction of the first circular blocking plate, an annular blocking plate (46) fixedly connected with the inner wall of the chamber of the dryer (31) is arranged right above the horizontal rods (43), and the annular width of the annular blocking plate (46) is slightly larger than the length of the horizontal rods (43); wall built-up powder clears away mechanism (138) is for evenly setting up four bulkhead vibrators (44) on desicator (31) outer wall along the circumferencial direction, and the rigid coupling has four rectangular plates (45) on desicator (31) outer wall, on every rectangular plate (45) demountable installation have one bulkhead vibrator (44).
2. The nano calcium carbonate powder drying system according to claim 1, wherein the distance between the outlet end of the steam conduit (10) and the inner wall of the hollow blade (2) is 20-40 mm.
3. The nano calcium carbonate powder drying system according to claim 1, wherein the height of the radial baffle plate (13) is one fifth of the height of the inner cavity of the hollow blade (2).
4. The nano calcium carbonate powder drying system according to claim 1, wherein the hollow blades (2) on the two hollow stirring shafts (1) are arranged in a mutually-inserted manner, and the two hollow stirring shafts (1) are driven by gears.
5. The nano calcium carbonate powder drying system according to claim 1, wherein a plurality of circular through holes (40) are uniformly distributed on the first circular blocking plate (39), and the diameter of the second circular blocking plate (42) is larger than that of the circular through holes (40).
6. The nano calcium carbonate powder drying system according to claim 1, wherein the surfaces of the first circular blocking plate (39), the second circular blocking plate (42) and the annular blocking plate (46) are coated with high temperature wear resistant ceramic paint.
7. The nano calcium carbonate powder drying system according to claim 1, wherein the rectangular plate (45) is welded with the outer wall of the dryer (31) through a plurality of horizontal pipes (47), and bin wall vibrator mounting holes are formed in the rectangular plate (45) so as to realize mounting and dismounting of the bin wall vibrator (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920605737.4U CN209893810U (en) | 2019-04-29 | 2019-04-29 | Nanometer calcium carbonate powder drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920605737.4U CN209893810U (en) | 2019-04-29 | 2019-04-29 | Nanometer calcium carbonate powder drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209893810U true CN209893810U (en) | 2020-01-03 |
Family
ID=69019680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920605737.4U Expired - Fee Related CN209893810U (en) | 2019-04-29 | 2019-04-29 | Nanometer calcium carbonate powder drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209893810U (en) |
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2019
- 2019-04-29 CN CN201920605737.4U patent/CN209893810U/en not_active Expired - Fee Related
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