CN102992330B - Fluidized bed deacidification purification device and process - Google Patents
Fluidized bed deacidification purification device and process Download PDFInfo
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- CN102992330B CN102992330B CN201110281365.2A CN201110281365A CN102992330B CN 102992330 B CN102992330 B CN 102992330B CN 201110281365 A CN201110281365 A CN 201110281365A CN 102992330 B CN102992330 B CN 102992330B
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- Prior art keywords
- bed
- fluidized
- room
- fluidized bed
- horizontal type
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000000746 purification Methods 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 34
- 239000012808 vapor phase Substances 0.000 claims abstract description 22
- 238000002485 combustion reaction Methods 0.000 claims abstract description 18
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 9
- 239000001257 hydrogen Substances 0.000 claims abstract description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 6
- 230000008021 deposition Effects 0.000 claims description 4
- 238000005243 fluidization Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000006229 carbon black Substances 0.000 abstract description 2
- 238000005192 partition Methods 0.000 abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 238000003889 chemical engineering Methods 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000012847 fine chemical Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000005202 decontamination Methods 0.000 description 3
- 230000003588 decontaminative effect Effects 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005049 combustion synthesis Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Landscapes
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The invention discloses a fluidized bed deacidification purification device and process, and belongs to the field of inorganic fine chemical engineering. The device is generally divided into a horizontal fluidized bed part and a vertical fluidized bed part, wherein each part is divided into an upper layer and a lower layer; each upper layer is a fluidized bed part for conveying materials; each lower layer is a combustion chamber of hydrogen and air; each combustion chamber is internally provided with a combustor; the upper layers and the lower layers are separated by partition plates; each partition plate is provided with a gas channel; the upper layer of the horizontal fluidized bed is separated into a plurality of chambers by a plurality of baffles; through channels are formed among the chambers, so that the materials can pass through from a feeding chamber to the following chambers sequentially until the materials flow into the vertical fluidized bed and are discharged from a discharge port of the vertical fluidized bed; and a vapor-phase silicon dioxide material after being deacidified by the horizontal fluidized bed enters the vertical fluidized bed for deacidification. Compared with the prior art, the deacidification technology disclosed by the invention enables the pH of white carbon black to be stabilized in a range from 4.3 to 4.6 by utilizing two-stage deacidification and improves product quality of SiO2 by using a vapor phase method.
Description
Technical field
The invention belongs to fine inorganic chemicals field, be specifically related to the deacidification purification device of nano-powder material, especially relate to a kind of vapor phase process SiO
2deacidification purification device and technique.
Background technology
The vapor phase process SiO of gaseous combustion synthesis
2be widely used in the field such as silicon rubber, tackiness agent, vapor phase process SiO
2in gaseous combustion preparation process, adsorb a large amount of HCl, HCl remove and become vapor phase process SiO
2an important procedure of preparation, fluidized-bed is progressively applied to vapor phase process SiO because of heat transfer between homogeneous temperature, gas-solid and the high advantage of rate of mass transfer
2surface HCl removes and surface treatment.
All the time, vapor phase process SiO
2depickling purification techniques rest on the technology that surperficial HCl is sloughed in the electrically heated of vertical fluidized bed always, too highly should not limit the depickling ability of equipment owing to being subject to vertical deacidification furnace height, deacidification effect is always unstable, and depickling is uneven.And traditional Electric heating, not only waste energy, and adopt the mode of external heat very big to the destructiveness of equipment, the material of this kind of depickling mode to equipment proposes challenge.In recent years, there is again the interior heating technique of perforate dress quartz glass tube (being furnished with electric stove wire in quartz glass tube) on deacidification furnace cylindrical shell, but owing to need open a lot of apertures on cylindrical shell, electric heating tube need often be changed, reduce the working life of equipment, and change normal operation and deacidification effect that electric heating tube affects equipment, also can better not solve vapor phase process SiO
2depickling problem.
Summary of the invention
The present invention, for solving the deficiencies in the prior art, provides the vapor phase process SiO that a kind of deacidification effect is good, depickling is even, processing power is large, energy consumption is low, uniform temperature fields, duration of service are long
2fluidized-bed depickling purification process and device.
By fluidized-bed depickling purification process of the present invention and device, vapor phase process SiO after depickling can be made
2pH be stabilized in the scope of 4.3 ~ 4.6.
Above-mentioned purpose of the present invention is achieved by the following technical programs:
The invention provides a kind of fluidized-bed deacidification purification device, this device is divided into horizontal type fluidized-bed with vertical fluidized bed two portions generally, every part is divided into two-layer up and down, upper strata is the Fluidized Bed Partial walking material, lower floor is combustion chamber, burner is provided with in combustion chamber, levels is separated by dividing plate, dividing plate is provided with gas passage, gas passage can be uniformly distributed on dividing plate, horizontal type fluidized-bed upper strata is divided into several room by some baffle plates, the passage communicated is had between room with room, material can be circulated over successively from feed chamber several rooms rearwards, until material enters vertical fluidized bed, the discharge port of free-standing fluidized-bed is discharged.
Passage between described horizontal type fluidized-bed interior room and room staggers mutually, to increase the circulation path of material, makes to reach better depickling decontamination effect improving.
The SiO of device
2opening for feed is located at horizontal type fluidized-bed top; Tail gas mouth is located at horizontal and top that is vertical fluidized bed respectively; Discharge port is located at the middle part of vertical fluidized bed; Waste material mouth is located at the bottom of vertical fluidized bed.Combustion chamber is also provided with gas inlet, for supplementing air for combustion chamber.
High-temperature gas mixture after lower floor's burning upwards sprays from the gas passage dividing plate, makes vapor phase process SiO
2fluidisation gets up to form fluidized-bed.
The present invention also innovates equipment material, and fluidized-bed deacidification purification device is made up of refractory materials, and solving metallic substance can not the performance of simultaneously corrosion-and high-temp-resistant, has stopped the introducing of metallic impurity simultaneously, and has saved cost.
The present invention also provides a kind of fluidized-bed depickling purification process, it is characterized in that: vapor phase process SiO
2material, through horizontal type fluidized-bed upper feed inlet access to plant, in the process, regulates the air input of burner, and makes SiO
2particle fully contacts with the high-temperature gas mixture from fluidized-bed bottom, as airflow function SiO
2the upward pressure of particle and SiO
2the buoyancy sum that particle is subject in gas equals SiO just
2during the gravity of particle, bed starts fluidization, and material shape is state fluidly.Several room is divided into by some baffle plates due to horizontal type fluidized-bed, the passage communicated is had between room with room, passage between room and room staggers mutually, and material enters vertical fluidized bed with the channel flow communicated between room along horizontal type fluidized-bed interior room, and the discharge port of free-standing fluidized-bed is discharged.
The fuel of burner is hydrogen.High-temperature gas mixture is the mixed gas of hydrogen and air.The gas passage of high-temperature gas mixture on dividing plate sprays into fluidized-bed layer.
In vertical fluidized bed, the HCl gas be separated is from offgas outlet discharger and enter next stage system and process.Vapor phase process SiO after depickling
2system is discharged through discharge port.Some large SiO
2particle deposition, in fluidized-bed bottom, can regularly be discharged from waste material mouth.
When fluidized-bed runs, the SiO in fluidized-bed
2particle disturbance strongly, mixes very even.Whole bed temperature is almost equal.Therefore, whole bed is the bed of material being in the condition of high temperature, newly enters the SiO of fluidized-bed
2particle only accounts for 5% ~ 10% of whole thermal material layer usually, through the strong disturbance of the bed of material with mix, just diffuse at once in whole high warm material layer.
High-temperature gas mixture is produced by hydrogen and air combustion, includes a large amount of H
2o molecule.Effectively can replace and remove vapor phase process SiO
2the HCl of Adsorption on Surface.
Beneficial effect:
Aerosil material enters the depickling of vertical fluidized bed again after horizontal type fluidized-bed depickling.Compared with prior art, deacidification technique of the present invention utilizes two-stage depickling, makes the pH of white carbon black be stabilized in the scope of 4.3 ~ 4.6, improves vapor phase process SiO
2product quality.
The present invention adopts the horizontal type fluidized-bed mode combined with vertical fluidized bed, greatly can reduce the height of fluidized-bed like this, effectively economizer cost.Meanwhile, the duration of contact between material can be increased, reach and fully converge, improve the effect of deacidification efficiency.
Passage between horizontal type fluidized-bed interior room and room staggers mutually, adds the circulation path of material, reaches better depickling decontamination effect improving.
Accompanying drawing explanation
Fig. 1 is the structural representation of fluidized-bed deacidification purification device;
Fig. 2 is the vertical view of Fig. 1;
Embodiment
The following examples can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.
Embodiment 1
As Fig. 1, shown in Fig. 2, fluidized-bed deacidification purification device is divided into horizontal type fluidized-bed 1 and vertical fluidized bed 2 two portions generally, every part is divided into two-layer up and down, upper strata is the Fluidized Bed Partial walking material, lower floor is the combustion chamber 3 of hydrogen and air, burner 6 is provided with in combustion chamber 3, levels is separated by dividing plate 5, dividing plate 5 is provided with gas passage 7, gas passage 7 can be uniformly distributed on dividing plate 5, horizontal type fluidized-bed upper strata is divided into several room by some baffle plates 4, the passage communicated is had between room with room, material can be circulated over successively from feed chamber several rooms rearwards, until material enters vertical fluidized bed, the discharge port 10 of free-standing fluidized-bed is discharged.
Passage in described horizontal type fluidized-bed 1 between room and room staggers mutually, to increase the circulation path of material, makes to reach better depickling decontamination effect improving.
The SiO of device
2opening for feed 8 is located at the top of horizontal type fluidized-bed 1; Tail gas mouth 9 is located at horizontal and top that is vertical fluidized bed 2 respectively; Discharge port 10 is located at the middle part of vertical fluidized bed 2; Waste material mouth 11 is located at the bottom of vertical fluidized bed 2.Combustion chamber 3 is also provided with gas inlet 12, for supplementing air for combustion chamber 3.
High-temperature gas mixture after lower floor's burning upwards sprays from the gas passage 7 dividing plate 5, makes vapor phase process SiO
2fluidisation gets up to form fluidized-bed.
Fluidized-bed deacidification purification device is made up of refractory materials, and solving metallic substance can not the performance of simultaneously corrosion-and high-temp-resistant, has stopped the introducing of metallic impurity simultaneously, and has saved cost.
Fluidized-bed opening for feed 8 and vapor phase process SiO
2supplied materials pipeline is connected, SiO
2after opening for feed 8 enters horizontal type fluidized-bed 1 upper strata, fully contact with the high-temperature gas mixture from fluidized-bed bottom, form fluid state.Some baffle plates 4 are provided with in horizontal type fluidized-bed 1, horizontal type fluidized-bed 1 is divided into several room by some baffle plates 4, the passage communicated is had between room with room, passage between room and room staggers mutually, material is along the channel flow communicated between room with room in horizontal type fluidized-bed 1 and enter vertical fluidized bed 2 (when being provided with two baffle plates, material flows according to path shown in curve in Fig. 2 13 and enters vertical fluidized bed 2).High-temperature gas mixture, from combustion chamber 3, is provided with burner 6 in combustion chamber 3.The fuel of burner 6 is hydrogen.High-temperature gas mixture is the mixed gas of hydrogen and air.The gas passage 7 of high-temperature gas mixture on dividing plate 5 sprays into fluidized-bed layer.
In vertical fluidized bed 2, the HCl gas be separated is from offgas outlet 9 discharger and enter next stage system and process.Vapor phase process SiO after depickling
2system is discharged through discharge port 10.Some large SiO
2particle deposition is in fluidized-bed bottom.Some large SiO
2particle deposition, in fluidized-bed bottom, can regularly be discharged from waste material mouth 11.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (6)
1. a fluidized-bed deacidification purification device, it is characterized in that: this device is divided into horizontal type fluidized-bed (1) and vertical fluidized bed (2) two portions, every part is divided into two-layer up and down, upper strata is the Fluidized Bed Partial walking material, lower floor is combustion chamber (3), burner (6) is provided with in combustion chamber (3), levels by dividing plate (5) separately, dividing plate (5) is provided with gas passage (7), horizontal type fluidized-bed upper strata is divided into several room by some baffle plates (4), the passage communicated is had between room with room, material can be circulated over successively from feed chamber several rooms rearwards, until material enters vertical fluidized bed, the discharge port (10) of free-standing fluidized-bed is discharged,
The Si0 of device
2opening for feed (8) is located at the top of horizontal type fluidized-bed (1); Tail gas mouth (9) is located at the top of horizontal type fluidized-bed (1) and vertical fluidized bed (2) respectively; Discharge port (10) is located at the middle part of vertical fluidized bed (2), waste material mouth (11) is located at the bottom of vertical fluidized bed (2), combustion chamber (3) is also provided with gas inlet (12), for supplementing air for combustion chamber (3);
Gas passage (7) is uniformly distributed on dividing plate (5);
High-temperature gas mixture after lower floor's burning upwards sprays from the gas passage (7) dividing plate (5), makes vapor phase process SiO
2fluidisation gets up to form fluidized-bed;
Fluidized-bed deacidification purification device is made up of refractory materials.
2. device according to claim 1, is characterized in that: the passage between described horizontal type fluidized-bed (1) interior room and room staggers mutually.
3. application rights requires a fluidized-bed depickling purification process for the fluidized-bed deacidification purification device described in 1, it is characterized in that: vapor phase process SiO
2material, through horizontal type fluidized-bed (1) upper feed inlet (8) access to plant, regulates the air input of burner, and makes SiO
2particle fully contacts with the high-temperature gas mixture from fluidized-bed bottom, material shape is state fluidly, horizontal type fluidized-bed (1) is divided into several room by some baffle plates (4), the passage communicated is had between room with room, passage between room and room staggers mutually, material enters vertical fluidized bed (2) with the channel flow communicated between room along horizontal type fluidized-bed (1) interior room, and the discharge port (10) of free-standing fluidized-bed is discharged.
4. technique according to claim 3, it is characterized in that: the fuel of burner (6) is hydrogen, high-temperature gas mixture is the mixed gas of hydrogen and air, and the gas passage (7) of high-temperature gas mixture on dividing plate (5) sprays into fluidized-bed layer.
5. technique according to claim 3, is characterized in that: in vertical fluidized bed, and the HCl gas be separated is from offgas outlet (9) discharger and enter next stage system and process, the vapor phase process SiO after depickling
2system is discharged through discharge port (10).
6. technique according to claim 3, is characterized in that: some large SiO
2particle deposition, in fluidized-bed bottom, is regularly discharged from waste material mouth (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110281365.2A CN102992330B (en) | 2011-09-13 | 2011-09-13 | Fluidized bed deacidification purification device and process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110281365.2A CN102992330B (en) | 2011-09-13 | 2011-09-13 | Fluidized bed deacidification purification device and process |
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| CN102992330A CN102992330A (en) | 2013-03-27 |
| CN102992330B true CN102992330B (en) | 2015-04-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021121557A1 (en) | 2019-12-17 | 2021-06-24 | Wacker Chemie Ag | Fluidized-bed reactor for the control of the dwell time distribution in continuously operated fluidized beds |
| CN111484023B (en) * | 2019-12-23 | 2022-10-11 | 浙江精功新材料技术有限公司 | Horizontal deacidification furnace for producing high-temperature steam based on hydrogen combustion method |
| CN112076612A (en) * | 2020-09-10 | 2020-12-15 | 李峰利 | Energy-conserving efficient industrial waste gas purification device that can automatically regulated |
| CN115215347B (en) * | 2022-06-17 | 2023-09-22 | 合盛硅业股份有限公司 | Fumed silica deacidification device and deacidification method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59184710A (en) * | 1983-04-05 | 1984-10-20 | Ube Ind Ltd | Removal method and device |
| CN1736878A (en) * | 2005-07-21 | 2006-02-22 | 华东理工大学 | Deacidification method of nano-titanium dioxide prepared by gas phase method |
| CN1785803A (en) * | 2005-11-09 | 2006-06-14 | 华东理工大学 | Continuous fluidized bed for gas phase preparing silicon dioxide and its industrial application |
| CN201737707U (en) * | 2010-07-26 | 2011-02-09 | 化学工业第二设计院宁波工程有限公司 | Fumed silica deacidification furnace |
-
2011
- 2011-09-13 CN CN201110281365.2A patent/CN102992330B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59184710A (en) * | 1983-04-05 | 1984-10-20 | Ube Ind Ltd | Removal method and device |
| CN1736878A (en) * | 2005-07-21 | 2006-02-22 | 华东理工大学 | Deacidification method of nano-titanium dioxide prepared by gas phase method |
| CN1785803A (en) * | 2005-11-09 | 2006-06-14 | 华东理工大学 | Continuous fluidized bed for gas phase preparing silicon dioxide and its industrial application |
| CN201737707U (en) * | 2010-07-26 | 2011-02-09 | 化学工业第二设计院宁波工程有限公司 | Fumed silica deacidification furnace |
Non-Patent Citations (1)
| Title |
|---|
| 纳米二氧化硅的流态化行为及卧式流化床多釜串联模型;罗美芳等;《过程工程学报》;20100430;第10卷(第2期);第221页第1节，第222页第2.2-2.3节，第223页第4.2节，第225页第6节，图4 * |
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