CN220878107U - A vapour solid separation device for titanium white production - Google Patents
A vapour solid separation device for titanium white production Download PDFInfo
- Publication number
- CN220878107U CN220878107U CN202322574707.0U CN202322574707U CN220878107U CN 220878107 U CN220878107 U CN 220878107U CN 202322574707 U CN202322574707 U CN 202322574707U CN 220878107 U CN220878107 U CN 220878107U
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- Prior art keywords
- bag filter
- air inlet
- titanium dioxide
- temperature bag
- pipe
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 238000000926 separation method Methods 0.000 title claims abstract description 17
- 239000007787 solid Substances 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 235000010215 titanium dioxide Nutrition 0.000 title description 42
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 44
- 238000007599 discharging Methods 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000001038 titanium pigment Substances 0.000 claims 3
- 239000002245 particle Substances 0.000 abstract description 21
- 238000003756 stirring Methods 0.000 abstract description 8
- 238000012797 qualification Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 9
- 230000007547 defect Effects 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000010902 jet-milling Methods 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The utility model discloses a vapor-solid separation device for titanium dioxide production, which comprises a high-temperature bag filter and a low-temperature bag filter, wherein the two bag filters are respectively provided with a feed pipe, a bottom spiral discharging machine and a tail gas discharge pipe, and induced draft fans are respectively arranged on the tail gas discharge pipes; the feeding port of the vortex classifier is connected with an air inlet pipe, the other end of the air inlet pipe is provided with an air inlet, the discharging port of the bottom spiral discharging machine of the high-temperature bag filter is connected with the middle part of the air inlet pipe, the fine material outlet of the vortex classifier is connected with the feeding pipe of the low-temperature bag filter, and the coarse material outlet of the vortex classifier is provided with a discharging valve; the method can separate the secondary agglomerated titanium dioxide with larger particle size from the titanium dioxide, ensure that the titanium dioxide product particles meet the requirements, and greatly improve the qualification rate of the high-stirring dispersibility of the product.
Description
Technical Field
The utility model relates to a gas-solid separation device, in particular to a gas-solid separation device for titanium dioxide production.
Background
Titanium dioxide has the characteristics of no toxicity, optimal whiteness, optimal opacity, optimal brightness and the like, is the white pigment with the best performance in the world at present, and is widely applied to the industries of paint, plastics, papermaking and the like. The high stirring dispersibility of the titanium dioxide is an important index, namely, after the titanium dioxide is stirred at a high speed under an alkyd resin system, the titanium dioxide is scraped on a scraper fineness gauge to read, the smaller the continuous dense large particle number is, the better the dispersibility is, the better the performance of the titanium dioxide used as paint and the like is, and the A-level standard rate of the titanium dioxide is: the high stirring dispersivity (um) of TYR-588 products is less than or equal to 25.
Because the TiO 2 particles have lattice defects, oxygen atoms on the lattices easily lose two electrons after absorbing ultraviolet energy, and release high-activity oxygen atom free radicals, so that organic matters contacted with titanium white are oxidized and decomposed, and a series of physical and chemical changes such as yellowing, light loss, pulverization and the like are caused in the coating, and the service life of the product is influenced.
In order to make up the photoactive defect of TiO 2 and change the surface property, surface treatment is needed, wherein the surface treatment comprises dispersion sanding, inorganic surface coating treatment, filter pressing washing, drying, jet milling, packaging and the like, so that the rutile type titanium dioxide finished product with good surface property, high whiteness and high dispersibility is obtained.
At present, a titanium dioxide producer selects a flat jet mill as final crushing equipment of titanium dioxide, superheated steam is used as a crushing working medium, and the crushed titanium dioxide sequentially passes through a gas-solid separation device consisting of a high-temperature bag filter and a low-temperature bag filter to carry out two-stage separation on the titanium dioxide and steam; however, when titanium dioxide is subjected to gas-solid separation in the high-temperature bag filter, the titanium dioxide particles are strong in adhesiveness, so that accumulated materials are easy to generate in the bag filter, the local temperature is too low, and the secondary agglomeration of the titanium dioxide particles is caused by the condensation of steam, so that the high stirring dispersion index of the product is poor.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a gas-solid separation device for titanium dioxide production, which can separate secondary agglomerated titanium dioxide with larger particle diameter in titanium dioxide, ensure that titanium dioxide product particles meet the requirements and greatly improve the qualification rate of high-stirring dispersibility of the product.
In order to achieve the aim, the gas-solid separation device for titanium dioxide production comprises a high-temperature bag filter and a low-temperature bag filter, wherein the two bag filters are respectively provided with a feeding pipe, a bottom spiral discharging machine and a tail gas exhaust pipe, and induced draft fans are respectively arranged on the tail gas exhaust pipes; the method is characterized in that: the feeding port of a vortex classifier is connected with an air inlet pipe, the other end of the air inlet pipe is provided with an air inlet, the discharging port of the bottom spiral discharging machine of the high-temperature bag filter is connected with the middle part of the air inlet pipe, the fine material outlet of the vortex classifier is connected with the feeding pipe of the low-temperature bag filter, and the coarse material outlet of the vortex classifier is provided with a discharging valve.
When the device is operated, the two induced draft fans and the vortex grader are started, the titanium dioxide subjected to jet milling firstly enters the high-temperature bag filter, the separated titanium dioxide enters the vortex grader through the discharging opening of the bottom spiral discharging machine, the range of graded particle size can be controlled by controlling the rotating speed of the turbine of the vortex grader, larger secondary agglomerated titanium dioxide particles in the titanium dioxide are separated, and are discharged from the coarse material outlet at the lower part, and the titanium dioxide particles with smaller particle size enter the low-temperature bag filter to continue gas-solid separation; the utility model can ensure that the titanium dioxide product particles meet the requirements, and greatly improves the qualification rate of the high-stirring dispersibility of the product.
As a further improvement of the utility model, the air inlet of the air inlet pipe is connected with a filter; can prevent impurities from entering the vortex classifier to be mixed with titanium dioxide, and ensure the product quality of the titanium dioxide.
As a further improvement of the utility model, a heat exchanger and a gas-liquid separator are sequentially arranged on the tail gas exhaust pipe between the high-temperature bag filter and the induced draft fan; the steam separated by the high-temperature bag filter can be cooled and condensed, so that heat recovery is realized.
As a further improvement of the utility model, two vibration exciters are arranged in the high-temperature bag filter and the low-temperature bag filter; prevent the accumulation of the wall of the bag filter and ensure smooth discharge.
In conclusion, the method can separate the secondary agglomerated titanium dioxide with larger particle size from the titanium dioxide, ensure that the titanium dioxide product particles meet the requirements, and greatly improve the qualification rate of the high-stirring dispersibility of the product.
Drawings
Fig. 1 is a block diagram of an embodiment of the present utility model.
Detailed Description
In order to more clearly understand the objects, technical solutions and advantageous effects of the present utility model, the present utility model will be further described with reference to the accompanying drawings, but the scope of protection of the present utility model is not limited to the following examples.
As shown in fig. 1, the gas-solid separation device for titanium dioxide production in this embodiment comprises a high-temperature bag filter 1, a vortex classifier 2 and a low-temperature bag filter 3, wherein the high-temperature bag filter 1 is provided with a feed pipe 4, a bottom spiral discharging machine 5 and a tail gas exhaust pipe 6, the tail gas exhaust pipe 6 is provided with an induced draft fan 7, and a heat exchanger 8 and a gas-liquid separator 9 are also sequentially arranged on the tail gas exhaust pipe 6 between the high-temperature bag filter 1 and the induced draft fan 7; the low-temperature bag filter 3 is provided with a feed pipe 10, a bottom spiral discharging machine 11 and a tail gas discharging pipe 12, and a draught fan 13 is arranged on the tail gas discharging pipe 12; the feeding port of the vortex classifier 2 is connected with an air inlet pipe 14, the other end of the air inlet pipe 14 is provided with an air inlet, the air inlet is connected with a filter 15, the discharging port of the bottom spiral discharging machine 5 of the high-temperature bag filter 1 is connected with the middle part of the air inlet pipe 14, the fine material outlet 16 of the vortex classifier 2 is connected with the feeding pipe 10 of the low-temperature bag filter 3, and the coarse material outlet of the vortex classifier 2 is provided with a discharging valve 17; two vibration exciters 18 or 19 are arranged in the high-temperature bag filter 1 and the low-temperature bag filter 3.
When the device is operated, the two induced draft fans 7 and 13 and the vortex classifier 2 are started, negative pressure is generated in the two bag filters by the two induced draft fans 7 and 13 respectively, titanium dioxide crushed by air flow firstly enters the high-temperature bag filter 1 through the feed pipe 4, separated steam enters the tail gas exhaust pipe 6, is cooled and condensed through the heat exchanger 8 and the air-liquid separator 9, so that heat recovery is realized, the separated titanium dioxide enters the vortex classifier 2 through the blanking port of the bottom spiral discharger 5, the classified particle size range can be controlled by controlling the rotating speed of the turbine of the vortex classifier 2, the secondary agglomerated titanium dioxide particles larger than 25 microns are usually separated and discharged from the coarse material outlet at the lower part and enter the air-flow crusher again for crushing, the titanium dioxide particles with smaller particle size enter the low-temperature bag filter 3, and the vapor-solid separation is continued, so that the particle size of the product is smaller than 25 microns; the utility model can ensure that the titanium dioxide product particles meet the requirements, and greatly improves the qualification rate of the high stirring dispersibility of the product; the filter 15 can prevent impurities from entering the vortex classifier 2 to be mixed with titanium dioxide, so that the product quality of the titanium dioxide is ensured; the two vibration exciters 18 and 19 can prevent the wall of the bag filter from accumulating materials and ensure smooth discharging.
Claims (4)
1. A vapour-solid separation device for titanium pigment production comprises a high-temperature bag filter and a low-temperature bag filter, wherein the two bag filters are respectively provided with a feed pipe, a bottom spiral discharging machine and a tail gas calandria, and induced draft fans are respectively arranged on the tail gas calandria; the method is characterized in that: the feeding port of a vortex classifier is connected with an air inlet pipe, the other end of the air inlet pipe is provided with an air inlet, the discharging port of the bottom spiral discharging machine of the high-temperature bag filter is connected with the middle part of the air inlet pipe, the fine material outlet of the vortex classifier is connected with the feeding pipe of the low-temperature bag filter, and the coarse material outlet of the vortex classifier is provided with a discharging valve.
2. The vapor-solid separation device for titanium pigment production according to claim 1, wherein: the air inlet of the air inlet pipe is connected with a filter.
3. A vapour-solid separation device for titanium dioxide production according to claim 1 or 2, characterised in that: and a heat exchanger and a gas-liquid separator are sequentially arranged on the tail gas exhaust pipe between the high-temperature bag filter and the induced draft fan.
4. A vapor-solid separation device for titanium pigment production according to claim 3, wherein: two vibration exciters are arranged in the high-temperature bag filter and the low-temperature bag filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322574707.0U CN220878107U (en) | 2023-09-21 | 2023-09-21 | A vapour solid separation device for titanium white production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322574707.0U CN220878107U (en) | 2023-09-21 | 2023-09-21 | A vapour solid separation device for titanium white production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220878107U true CN220878107U (en) | 2024-05-03 |
Family
ID=90868744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322574707.0U Active CN220878107U (en) | 2023-09-21 | 2023-09-21 | A vapour solid separation device for titanium white production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220878107U (en) |
-
2023
- 2023-09-21 CN CN202322574707.0U patent/CN220878107U/en active Active
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