CN211891681U - Expanded microsphere's foaming screening plant - Google Patents
Expanded microsphere's foaming screening plant Download PDFInfo
- Publication number
- CN211891681U CN211891681U CN201922230371.XU CN201922230371U CN211891681U CN 211891681 U CN211891681 U CN 211891681U CN 201922230371 U CN201922230371 U CN 201922230371U CN 211891681 U CN211891681 U CN 211891681U
- Authority
- CN
- China
- Prior art keywords
- foaming
- cavity
- screening device
- microspheres
- expanded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000004005 microsphere Substances 0.000 title claims abstract description 66
- 238000005187 foaming Methods 0.000 title claims abstract description 50
- 238000012216 screening Methods 0.000 title claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 7
- 239000010935 stainless steel Substances 0.000 claims abstract description 7
- 238000011084 recovery Methods 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 6
- 239000011324 bead Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 13
- 238000000605 extraction Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 229920001169 thermoplastic Polymers 0.000 description 4
- 239000004416 thermosoftening plastic Substances 0.000 description 4
- 229920000103 Expandable microsphere Polymers 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004347 surface barrier Methods 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 239000002928 artificial marble Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Landscapes
- Manufacturing Of Micro-Capsules (AREA)
Abstract
The utility model provides a foaming screening plant of expanded beads, it includes: the cavity is formed by an annular infrared heater and a stainless steel metal lantern ring; the discharge port pipeline is arranged at the upper end of the cavity; the metal screen is arranged at the lower end of the cavity; the feeding device is arranged on the side wall of the cavity; and the material collecting box and the micro negative pressure air exhaust device are sequentially connected to the discharge port pipeline. When the foaming screening device provided by the invention is used for preparing expanded microspheres, a microsphere raw material is conveyed into a cavity through a feeding device, foaming is started under the irradiation of an infrared heater, a micro negative pressure air exhaust device is started to ventilate to enable the cavity to have a certain air speed, expanded microspheres are pumped out of the cavity along with air flow to leave a heating area and are collected in an aggregate box, unexpanded microspheres with higher density or incompletely expanded microspheres are settled or suspended in the cavity, and the suspended microspheres are expanded continuously until the density is reduced and then are separated.
Description
Technical Field
The utility model relates to a macromolecular material technical field especially relates to a foaming screening plant of expanded beads.
Background
The unfoamed and foamed thermoplastic microspheres can be used in various fields. For example, the dried foamed microspheres can be used as sensitizers for emulsion explosives and as lightweight fillers for solvent-based paints, coatings and various thermoset plastics (e.g., artificial marble, polyester putty, artificial wood). The wet foamed microspheres, which are typically stored as an aqueous suspension slurry, can be used in a variety of products such as aqueous coatings, thermal printer paper, porous ceramics, emulsion explosives, and the like.
Transportation of expanded microspheres often requires a large space and for this reason the expanded microspheres are often purchased unfoamed by the end user, either foamed in place or by directly adding the unfoamed expanded microspheres to the production step for the preparation of the final product.
Since the high temperatures required for fully foaming the thermally expandable microspheres can lead to the problem of agglomeration of the thermoplastic shells of the microspheres due to foaming, it is desirable to provide a method and an apparatus for producing foamed thermally expandable microspheres in which the degree of foaming can be controlled, so that it is possible to provide foamed microspheres of different densities, while they are simple and require only little space, are relatively inexpensive and easy to use by the end user, and save transportation space and costs since the foamed microspheres are used on site.
Numerous patents have mentioned methods and apparatus for foaming thermoplastic expanded microspheres. Methods and devices suitable for dry powder foaming of expanded microspheres are described, for example, in US5484815 and US 7192989. US patent US4513106, on the other hand, proposes a method and apparatus suitable for foaming a slurry of microspheres, the principle of which is to introduce steam into a slurry of expandable microspheres and to generate sufficient pressure to heat the microspheres to at least some extent expand them, and then to leave the pressure zone at a velocity of at least 1m/s for the microspheres to expand further due to the pressure reduction. Although the US4513106 patent suggests that the method of foaming expanded microspheres in slurry form can solve the problem of much dust around the directly foamed microspheres due to dry powder, the foaming process of microsphere slurry described in US4513106 still needs to be further improved. EP0348372 discloses a process for the preparation of expanded thermoplastic microspheres, wherein the expansion takes place on a conveyor belt. The process works well but takes up more space and is more expensive. US4722943 and US5342689 describe a process for expanding microspheres, wherein the microspheres are mixed with a surface barrier coating to prevent agglomeration during the drying step. However, the amount of processing aids, such as talc, is very high and this affects the possibility of quenching. This also creates difficulties in controlling the degree of foaming of the microspheres. CN1882638B, CN101263183A and CN1729087A describe methods for foaming microspheres, as such, wherein the microspheres are mixed with a surface barrier coating to prevent agglomeration during the foaming step. Meanwhile, the foaming device is complex to prepare.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems and disadvantages of the prior art, the present invention is directed to a simple, practical and easy-to-operate foaming and sieving device for preparing expanded microspheres. Adopt the utility model discloses a foaming screening plant for all microballon foamer raw materials can both fully be foamed, the microballon of having foamed is separated the suction under the micro-negative pressure condition, the microballon of not foaming can fully be heated to the foaming after by the suction again, can prevent effectively that microballon foamer foaming degree is not enough or the problem of not foaming, the microballon is in the state in the air at the foaming in-process part simultaneously, the phenomenon of bonding or caking each other has been avoided, the product quality is improved, the microballon of having foamed of the pure of the acquisition that can be stable in succession, guarantee production efficiency.
The utility model discloses a embody through following technical scheme:
the utility model provides a foaming screening device of expanded microspheres, which comprises a cylindrical foaming cavity; the lower section of the wall of the cavity is provided with an annular infrared heater, and the upper section of the wall of the cavity is provided with a stainless steel metal lantern ring; the bottom of the cavity is provided with a metal screen mesh which is used as a raw material carrier and an air inlet device; a discharge port pipeline is arranged at the top of the cavity; the side wall of the cavity is connected with a feeding device, such as a screw conveying feeding device. Furthermore, an air volume control device is arranged on the discharge port pipeline. Furthermore, the discharge port pipeline is connected with a micro negative pressure air extraction device, such as a fan, so that the expanded microspheres with lower density can slowly rise in the expansion cavity and are finally sucked out. Furthermore, a material collecting box used for collecting expanded microspheres is arranged between the discharge port pipeline and the micro-negative pressure air exhaust device, and a filter screen is radially arranged in the material collecting box, so that the expanded microspheres are prevented from entering the micro-negative pressure air exhaust device.
Preferably, the interior of the cavity is a smooth inner wall.
Preferably, the metal screen is a stainless steel screen with a pore size of less than 20 μm.
Preferably, the bottom of said metal screen is provided with a rapping device, e.g. an automatic rapping device, which strikes the metal screen once every 30s, which will strike the unfoamed microspheres which have sunk onto the metal screen into suspension.
Preferably, the connection part of the discharge port pipeline and the cavity cylindrical barrel is a truncated cone-shaped contraction section, and the bottom angle of the truncated cone shape is 45-60 degrees. The discharge port pipeline is communicated with the cavity through the circular truncated cone structure, so that the surface air speed of air flow in the pipeline can be gradually reduced through the circular truncated cone structure, and the effect that the air flow speed in the cavity is slowly and uniformly distributed and rises is achieved.
Preferably, a recovery device is arranged at the bottom of the metal screen, and the unfoamed microspheres with small particle sizes penetrate through the metal screen to be recovered by the recovery device, so that an unfoamed microsphere raw material with small particle sizes and uniform distribution can be obtained.
Preferably, a plurality of branch pipes are arranged on the discharge port pipeline, and each branch pipe is provided with an air volume control device with different ranges.
Preferably, the air volume control system can enable the surface air speed in the cavity to be accurate to 0.1 cm/s.
Compared with the prior art, the utility model discloses the technique has following beneficial effect:
(1) the utility model discloses a little negative pressure air exhaust device makes the less little microballon that has expanded of density can be in the inflation cavity slow rising finally by the suction to fully be heated reaches the effect of complete inflation.
(2) The utility model discloses can meticulous regulation and control wind speed, reach and have foamed the microballon and can stop in the bottom of cavity or the upward movement of speed more by faster suction and not foamed the microballon to have sufficient time to make its inflation finally to be separated out the cavity again.
(3) The utility model discloses a fine and close screen cloth of metal is as carrier and air inlet unit, and the aperture that the air current passed metal mesh becomes evenly ascending, drives the microballon granule, makes the microballon have good dispersibility in the system, can effectively reduce the bonding phenomenon of microballon in the foaming process.
Drawings
Fig. 1 is a schematic view of a foaming screening device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way.
In one embodiment, the present invention provides a foaming screening device for expanded microspheres comprising a chamber 10 consisting of an annular infrared heater 1 and a stainless steel metal collar 2; a discharge port pipeline 4 is arranged at the upper end of the cavity 10; a metal screen 7 is arranged at the lower end of the cavity 10; the side wall of the cavity 10 is provided with a feeding device 6; the discharge port pipeline 4 is sequentially connected with a material collecting box 11 and a micro negative pressure air extraction device 12.
When the foaming screening device provided by the embodiment is used for preparing expanded microspheres, a microsphere raw material is conveyed into the cavity 10 through the feeding device 6, foaming is started under the irradiation of the infrared heater 1, the micro negative pressure air extraction device 12 is started to ventilate so that the cavity 10 has a certain air speed, and at the moment, expanded microspheres are pumped out of the cavity 10 along with air flow, so as to leave a heating area and enter the material collecting box 11; while the denser unexpanded or incompletely expanded microspheres will settle or suspend within the chamber 10, the suspended microspheres will continue to expand to a reduced density and then separate.
In another embodiment, the present invention provides a device for foaming and screening expanded microspheres, comprising a chamber 10 formed by an annular infrared heater 1 and a stainless steel metal collar 2; the upper end of the cavity 10 is connected with a truncated cone-shaped contraction section 3 and a discharge port pipeline 4, and the bottom angle of the truncated cone is 45-60 degrees, such as 60 degrees; the bottom end of the cavity 10 is provided with a uniform and fine metal screen 7; a feeding device 6 is arranged on the side wall of the cavity 10, and a feeding hole in the side wall of the feeding device 6 is positioned at the upper end of the infrared heater 1; the discharge port pipeline 4 is sequentially connected with a material collecting box 11 and a micro negative pressure air extraction device 12; a plurality of air volume control devices 5 are arranged on the discharge port pipeline 4; the lower end of the metal screen 7 is provided with a rapping device 8 and a fine material recovery device 9; a filter screen 13 is radially arranged in the material collecting box 11; in practical application, the ascending speed of the expanded microspheres in the cavity 10 is adjusted by adjusting the plurality of air volume control devices 5.
When the foaming screening device provided by the embodiment is used for preparing expanded microspheres, a microsphere raw material is conveyed into the cavity 10 through the feeding device 6, foaming is started under the irradiation of the infrared heater 1, the micro-negative pressure air extraction device 12 is started to ventilate so that a certain air speed is provided in the cavity 10, the expanded microspheres are extracted from the cavity 10 along with air flow and then leave a heating area and enter the material collection box 11, and meanwhile, the expanded microspheres cannot enter the micro-negative pressure air extraction device 12 due to the blocking of the filter screen 13 in the material collection box; while the denser unexpanded or incompletely expanded microspheres will settle or suspend within the chamber 10. The suspended microspheres will continue to expand until the density is reduced and then separated, and the settled microspheres will continue to expand by heating after suspending in the air under the action of the rapping device 8, and will be separated to a certain extent.
When the expanded microspheres are prepared by using the foaming screening device provided by the embodiment, the air volume control device 5 is used for adjusting the air volume, so that the expansion time and the separation speed of the microspheres with different properties in a system are controlled:
firstly, a feeding switch is turned on, an infrared heating device is turned on, the air volume in the cavity is adjusted to 5.5cm/s, the residence time of the microspheres in a heating area is about 32s, and the expanded microspheres have the particle size of 80-100 microns and are completely expanded.
And secondly, starting a feeding switch, starting an infrared heating device, adjusting the air volume in the cavity to 14.0cm/s, controlling the residence time of the microspheres in the heating area to 11s, controlling the particle size of the expanded microspheres to be 60-80 mu m, and ensuring that part of the microspheres are not completely expanded.
And thirdly, starting a feeding switch, starting an infrared heating device, adjusting the air volume in the cavity to 23.0cm/s, wherein the residence time of the microspheres in the heating area is about 3s, the particle size of the expanded microspheres is 20-40 mu m, and most of the microspheres are not completely expanded.
The above description is only the preferred embodiment of the present invention. It is to be understood that the invention is not limited to the specific embodiments described above. It should be noted that, for those skilled in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as falling within the protection scope of the present invention.
Claims (9)
1. A foaming screening device of expanded microspheres, characterized in that, the foaming screening device includes:
the cavity is formed by an annular infrared heater and a stainless steel metal lantern ring;
the discharge port pipeline is arranged at the upper end of the cavity;
the metal screen is arranged at the lower end of the cavity;
the feeding device is arranged on the side wall of the cavity; and
the material collecting box and the micro negative pressure air exhaust device are sequentially connected to the discharge port pipeline.
2. The foaming screening device of claim 1, wherein the foaming screening device further comprises an air volume control device disposed on the outlet duct.
3. The foaming screening device of claim 1, wherein the foaming screening device further comprises a truncated cone shaped constriction section arranged between the cavity and the discharge port pipe, and a truncated cone base angle of the truncated cone shaped constriction section is 45-60 °.
4. The foaming screening device of claim 1, wherein said foaming screening device further comprises a rapping device disposed at a lower end of said metal screen.
5. The foaming screening device of claim 1, wherein the foaming screening device further comprises a fines recovery device disposed below the metal screen.
6. The foaming screening device of claim 1, wherein the metal screen is a stainless steel screen with pore sizes less than 20 μ ι η.
7. The foaming screening device of claim 1, wherein the feed device is a screw-conveyed feed device.
8. The foaming screening device of claim 1, wherein the outlet duct has a plurality of branches, each branch having an air flow control device.
9. The foaming screening device of claim 1, wherein the inside of the collection box is radially provided with a screen having a diameter smaller than the diameter of the expanded microspheres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922230371.XU CN211891681U (en) | 2019-12-13 | 2019-12-13 | Expanded microsphere's foaming screening plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922230371.XU CN211891681U (en) | 2019-12-13 | 2019-12-13 | Expanded microsphere's foaming screening plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211891681U true CN211891681U (en) | 2020-11-10 |
Family
ID=73292889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922230371.XU Active CN211891681U (en) | 2019-12-13 | 2019-12-13 | Expanded microsphere's foaming screening plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211891681U (en) |
-
2019
- 2019-12-13 CN CN201922230371.XU patent/CN211891681U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110815697A (en) | Expanded microsphere foaming screening device and application thereof | |
| US11548034B2 (en) | Accelerating cyclone that separates solids particles | |
| CN207422779U (en) | A kind of suspension drying for preparing granule and fine powder sieving device | |
| US4057908A (en) | Method and apparatus for drying damp powder | |
| CN100579879C (en) | Delivery spray nozzle, polytetrafluoroethylene fine particle processing method and apparatus using the spray nozzle | |
| CN105698512B (en) | A kind of spray drying system | |
| CN211891681U (en) | Expanded microsphere's foaming screening plant | |
| CN203940692U (en) | A kind of rotary flash distillation formula biomass powder raw material drying machine | |
| CN108224903A (en) | Granule materials series classification screens pneumatic conveyer dryer | |
| CN1066257C (en) | Process and apparatus for drying liquid-borne solid material | |
| CN203790303U (en) | Fluid-bed granulator for drug preparation | |
| KR101352831B1 (en) | Drying system combining a fluidized bed drying and swirling air flow drying | |
| CN108947580A (en) | A kind of exfoliated vermiculite raw powder's production technology | |
| CN208340662U (en) | Dry suspension spray granulation plant | |
| CN208340140U (en) | A kind of spray-drying installation for PVC foam regulator | |
| CN208327410U (en) | A kind of spraying process units of aluminium polychloride | |
| CN206613189U (en) | Animal protein centrifugal spray drying device | |
| CN214095318U (en) | Drying device is used in production of 3-chloropropyne | |
| CN206709574U (en) | A kind of aluminium powder drying system | |
| CN214926422U (en) | Polystyrene foam particle drying and curing system | |
| CN104194857B (en) | Biomass material processing method and system thereof | |
| CN207237918U (en) | CABLE MATERIALS mixer-granulator is used in one kind granulation | |
| CN215026055U (en) | Spray drying tower is used in ceramic tile production | |
| CN104567318B (en) | Rubber grain is dried and is automatically separated dry systems and is dried separation method with powder | |
| CN215086910U (en) | Nanometer powder balling equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A foam screening device for expanding microspheres Effective date of registration: 20231017 Granted publication date: 20201110 Pledgee: Silicon Valley Bank Co.,Ltd. Pledgor: Fast thinking technology (Shanghai) Co.,Ltd.|NANOSPHERE (SHANGHAI) Co.,Ltd. Registration number: Y2023310000625 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |