CN203112518U - Industrial production device for preparing nano-silicon-dioxide rice hull ash - Google Patents
Industrial production device for preparing nano-silicon-dioxide rice hull ash Download PDFInfo
- Publication number
- CN203112518U CN203112518U CN2012206521564U CN201220652156U CN203112518U CN 203112518 U CN203112518 U CN 203112518U CN 2012206521564 U CN2012206521564 U CN 2012206521564U CN 201220652156 U CN201220652156 U CN 201220652156U CN 203112518 U CN203112518 U CN 203112518U
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- boiler
- rice hull
- hull ash
- fluidized
- industrial production
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The utility model discloses an industrial production device for preparing nano-silicon-dioxide rice hull ash. The industrial production device comprises a fluidized bed boiler, a cyclone separator, a heat exchanger and a cloth-bag dust remover, wherein the design of the fluidized bed boiler adopts a variable-section hearth and sectional type temperature control and air distribution and adopts the characteristics of a secondary air system and a heightened dilute-phase area. According to the fluidized bed boiler, the operating temperature is 670-720 DEG C, the operating air speed is 0.9-1.4m/s, and the excess air coefficient is 1.16-1.21. The industrial production device disclosed by the utility model has the advantages that not only can the own energy of the rice hull be effectively used for supplying heat, the heat efficiency of the boiler is improved, and the energy is saved, but also the high-purity nano-structure SiO2 rice hull ash can also be prepared, and stable reaction conditions are ensured. By inspection, the prepared rice hull ash contains more than 90% of amorphous high-purit SiO2, and the form of the prepared rice hull ash is 15-30nm nano particles.
Description
Technical field
The utility model is about preparation nanostructure SiO
2Rice hull ash, particularly a kind of nanostructure SiO
2The industrial production device of rice hull ash.
Background technology
About 200,000,000 tons of the rice yield in China every year accounts for 1/3 of Gross World Product, occupies first place in the world.Rice husk is byproduct of rice processing, accounts for paddy kernel weight 20%, 4,000 ten thousand tons of left and right sides rice husks of annual generation, and stock number is huge.A large amount of rice husk resources are underutilized, and many in the rural area is main processing mode with the field burning, not only contaminate environment but also waste energy.In recent years, studies show that and contain 20% the amorphous Si O of having an appointment in the rice hull ash
2, it possesses high reactivity, is a kind of additive of material of construction, can be used as industrial basic raw materials such as fine ceramics, photoconductive fiber and solar cell after the purification, has high added value.Therefore, not only utilized rice husk energy but also can the unformed high-purity Si O of suitability for industrialized production
2Technology be badly in need of to improve with perfect.
The patent of invention of application number 93116790.6 device of active rice husk ash " produce " has introduced the intermittent type incinerator and prepared the rice hull ash method, but there is following deficiency in this technology: 1. can't continuous-feeding, and the two step method complicated operation is unfavorable for industrialization promotion; 2. the energy of rice husk self is underutilized, and causes energy dissipation.The patent of invention of application number 200410026459.5 " the nanostructure SiO2 rice hull ash of a kind of rice husk incinerator and output thereof ", adopt closed rice husk incinerator to prepare nanostructure SiO2 rice hull ash, this patent arranges heat exchanger tube, effectively take away the heat of rice husk burning heat release, but be subject to closed incinerator, can't continuous feeding, be difficult to solve problems such as industrialization promotion." circular fluid bed of combusting rice hull " of publication number 102252325A is to be purpose with the combustion power generation, there is no the preparation technology who relates to rice hull ash.
Summary of the invention
The purpose of this utility model is the shortcoming and defect that overcomes prior art, provide a kind of can suitability for industrialized production high-purity nm structure SiO
2The device of rice hull ash, and can effectively utilize rice husk to burn the heat energy that produces.
The utility model is achieved by following technical solution.
A kind of industrial production device for preparing the nano silicon rice hull ash, comprise boiler, material feeder, separator and fly-ash separator, it is characterized in that described boiler is the fluidized-bed combustion boiler of variable cross-section burner hearth, the upper furnace of this fluidized-bed combustion boiler 6 is provided with freeboard of fluidized bed 18, and the freeboard of fluidized bed diameter is 920mm; Lower furnace portion is provided with emulsion zone 17, and the emulsion zone diameter is 620mm; The burner hearth middle part is provided with variable cross-section district 19, and the vertical angle in variable cross-section district 19 is 12.5 °; The height overall of fluidized-bed combustion boiler 6 is 6m; Emulsion zone and variable cross-section district respectively arrange a cooling water jecket A4 and cooling water jecket B20, and the height of each cooling water jecket is 400～500mm, and two cooling water jeckets are interconnected; The foot of boiler is provided with combustion chamber 16, is provided with portfire 1, wind entrance 2 and ash bucket A11 below the combustion chamber 16; Combustion chamber 16 is provided with air distribution plate 15 with the junction of emulsion zone 17, one side of emulsion zone 17 is provided with screw feeder 3, be provided with secondary air entrance 5 in variable cross-section district 19, be disposed with primary cyclone 7, secondary cyclone 8, interchanger 9 and sack cleaner 10 at boiler furnace outlet; Be respectively arranged with ash bucket B12, ash bucket C13 and ash bucket D14 in the bottom of primary cyclone 7, secondary cyclone 8 and sack cleaner 10.
The burner hearth liner of described fluidized-bed combustion boiler 6 is anticorrosion refractory materials.
The rice hull ash of this production equipment preparation contains the unformed high-purity Si O greater than 90%
2, its form is the nanoparticle of 15～30nm.
The utility model compared with prior art, unusual effect is as follows:
The suitability for industrialized production of preparation nano silicon rice hull ash of the present utility model is established device, owing to designed the variable cross-section boiler and introduced secondary air, has improved the thermo-efficiency of boiler, has solved the limited problem of rice husk stacking volume simultaneously.Owing to increased secondary cyclone, make the rice husk sufficient combustion, separate fully, prepare high-purity nm structure SiO
2Rice hull ash; Simultaneously, owing to adopt cooling water jecket and interchanger, can effectively control the incineration temperature of boiler, guarantee stable reaction conditions, this part of waste heat can take full advantage of simultaneously, and as heating, heat supply water utilizes steam-electric power etc., has saved a large amount of energy.
Description of drawings
Fig. 1 is nanostructure SiO of the present utility model
2The structural representation of rice hull ash production equipment.
The utility model Reference numeral is as follows:
1------wind entrance of portfire 2------
3------screw feeder 4------cooling water jecket A
5------secondary air entrance 6------fluidized-bed combustion boilers
7------primary cyclone 8------secondary cyclones
9------interchanger 10------sack cleaners
11------ash bucket A 12------ash bucket B
13------ash bucket C 14------ash bucket D
15------air distribution plate 16------combustion chambers
17------emulsion zone 18------freeboard of fluidized bed
19------variable cross-section district 20------cooling water jecket B
Embodiment
The utility model adopts conventional production unit and preparation technology, below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is nanostructure SiO of the present utility model
2The structural representation of rice hull ash production equipment.As shown in Figure 1, boiler of the present utility model is the fluidized-bed combustion boiler 6 of variable cross-section burner hearth, and the upper furnace of this fluidized-bed combustion boiler 6 is provided with freeboard of fluidized bed 18, and the freeboard of fluidized bed diameter is 920mm; Lower furnace portion is provided with emulsion zone 17, and the emulsion zone diameter is 620mm; The burner hearth middle part is provided with variable cross-section district 19, and the vertical angle in variable cross-section district 19 is 12.5 °; The height overall of fluidized-bed combustion boiler 6 is 6m, and the burner hearth liner is anticorrosion refractory materials.Emulsion zone and variable cross-section district respectively arrange a cooling water jecket A4 and cooling water jecket B20, and the height of each cooling water jecket is 400～500mm, and two cooling water jeckets are interconnected; The foot of boiler is provided with combustion chamber 16, is provided with portfire 1, wind entrance 2 and ash bucket A11 below the combustion chamber 16; Combustion chamber 16 is provided with air distribution plate 15 with the junction of emulsion zone 17, one side of emulsion zone 17 is provided with screw feeder 3, be provided with secondary air entrance 5 in variable cross-section district 19, be disposed with primary cyclone 7, secondary cyclone 8, interchanger 9 and sack cleaner 10 at boiler furnace outlet; Be respectively arranged with ash bucket B12, ash bucket C13 and ash bucket D14 in the bottom of primary cyclone 7, secondary cyclone 8 and sack cleaner 10.
The utility model principle of work is as follows: particle diameter is that the quartzy casting bed material of 0.6mm places fluidized-bed combustion boiler 6 bottoms, and height is at 400-600mm.Open wind 2 one time, by air distribution plate 15, the wind that enters burner hearth evenly distributes and makes bed reach the Micro Fluid state.During with the rate of heating temperature programming to 400 of 5 ℃/min ℃, start ignition under bed device 1, use solar oil to light a fire, send into fluidized-bed combustion boiler 6 by screw feeder 3 a small amount of rice husks of supplying with, increase air quantity (250m
3/ h) make bed reach the stabilization fluid state, when bed temperature reaches 600 ℃, increase the feeding machine feeding coal, close ignition under bed device 1 simultaneously, and look the bed temperature change situation and adjust air quantity, cooling water inflow and feeding coal.The cooling water flow of adjusting feeding coal and cooling water jecket 4 makes bed temperature be stabilized in (670 ℃～720 ℃) under the suitable operating mode, drops into secondary air 5, and the actual motion wind speed is 0.9～1.4m/s.Rice husk burns at the emulsion zone fugitive constituent, discharge a large amount of heats, further burn to freeboard of fluidized bed with flue gas, the high-temperature flue gas that the burning back produces is successively by primary cyclone 7, secondary cyclone 8, interchanger 9 and sack cleaner 10, cooling back flue gas meets discharging standards and is discharged by chimney after processing such as desulfurization.Rice hull ash is collected in the ash bucket 11-14 of burner hearth, cyclonic separator and sack cleaner bottom.Hot flue gas is cooling off through behind the interchanger, and its heat is used for supplying with factory building and near Residential areas hot water, also can be used for hot steam or generating.
The rice hull ash of the utility model preparation after measured, its chemical constitution SiO
2Content all is higher than 90%, reaches as high as 97.1%, and the carbon residue amount is lower than 2%, and boiler combustion efficiency reaches more than 93%.X-ray diffraction pattern shows not have obvious crystalline state SiO
2Diffraction peak, this shows the SiO in the rice hull ash of preparation
2Exist with metamict.Adopt the SEM technology that the rice hull ash of the utility model preparation is carried out surfaces externally and internally and transverse section observation, show compact structure, and can observe clearly that internal surface is thin, network structure is more closely knit, the duct is abundant, high-visible, outside surface is thick slightly, structure is thicker, the duct is undeveloped; Be an interlayer between the surfaces externally and internally, interlayer is made of crisscross plate, is loose cellular, contains a large amount of holes, and the yardstick of these holes is about 10 μ m.Adopt the TEM technology to amplify when observing, the superfine little particle that discovery is piled up is together in a large number arranged with cellular, and particle diameter is about 15-30nm.The SiO of these nanoscales
2The hole of particle and micro-meter scale makes rice hull ash have bigger specific surface area and high reactivity, is fit to special application requiring.
Claims (2)
1. industrial production device for preparing the nano silicon rice hull ash, comprise boiler, material feeder, separator and fly-ash separator, it is characterized in that, described boiler is the fluidized-bed combustion boiler of variable cross-section burner hearth, the upper furnace of this fluidized-bed combustion boiler (6) is provided with freeboard of fluidized bed (18), and the freeboard of fluidized bed diameter is 920mm; Lower furnace portion is provided with emulsion zone (17), and the emulsion zone diameter is 620mm; The burner hearth middle part is provided with variable cross-section district (19), and the vertical angle of variable cross-section district (19) is 12.5 °; The height overall of fluidized-bed combustion boiler (6) is 6m; Emulsion zone and variable cross-section district respectively arrange a cooling water jecket A(4) and cooling water jecket B(20), the height of each cooling water jecket is 400～500mm, two cooling water jeckets are interconnected; The foot of boiler is provided with combustion chamber (16), is provided with portfire (1), a wind entrance (2) and ash bucket A(11 below combustion chamber (16)); Combustion chamber (16) is provided with air distribution plate (15) with the junction of emulsion zone (17), one side of emulsion zone (17) is provided with screw feeder (3), be provided with secondary air entrance (5) in variable cross-section district (19), be disposed with primary cyclone (7), secondary cyclone (8), interchanger (9) and sack cleaner (10) at boiler furnace outlet; Bottom at primary cyclone (7), secondary cyclone (8) and sack cleaner (10) is respectively arranged with ash bucket B(12), ash bucket C(13) and ash bucket D(14).
2. according to the industrial production device of the preparation nano silicon rice hull ash of claim 1, it is characterized in that the burner hearth liner of described fluidized-bed combustion boiler (6) is anticorrosion refractory materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206521564U CN203112518U (en) | 2012-11-30 | 2012-11-30 | Industrial production device for preparing nano-silicon-dioxide rice hull ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206521564U CN203112518U (en) | 2012-11-30 | 2012-11-30 | Industrial production device for preparing nano-silicon-dioxide rice hull ash |
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| Publication Number | Publication Date |
|---|---|
| CN203112518U true CN203112518U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206521564U Withdrawn - After Issue CN203112518U (en) | 2012-11-30 | 2012-11-30 | Industrial production device for preparing nano-silicon-dioxide rice hull ash |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992335A (en) * | 2012-11-30 | 2013-03-27 | 天津大学 | Industrial production device and method for producing nanometer SiO2 rice hull ash |
| CN103695015A (en) * | 2014-01-06 | 2014-04-02 | 中盈长江国际新能源投资有限公司 | Device and method for accelerating gas generating speed by biomass pyrolysis and obtaining nanoscale carbon dioxide material |
| CN106287685A (en) * | 2016-08-22 | 2017-01-04 | 海伦市利民节能锅炉制造有限公司 | Small-sized biomass shaped fuel Circulating Fluidized Bed Hot Water Boiler |
-
2012
- 2012-11-30 CN CN2012206521564U patent/CN203112518U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992335A (en) * | 2012-11-30 | 2013-03-27 | 天津大学 | Industrial production device and method for producing nanometer SiO2 rice hull ash |
| CN102992335B (en) * | 2012-11-30 | 2014-06-11 | 天津大学 | Industrial production device and method for producing nanometer SiO2 rice hull ash |
| CN103695015A (en) * | 2014-01-06 | 2014-04-02 | 中盈长江国际新能源投资有限公司 | Device and method for accelerating gas generating speed by biomass pyrolysis and obtaining nanoscale carbon dioxide material |
| WO2015101360A1 (en) * | 2014-01-06 | 2015-07-09 | 中盈长江国际新能源投资有限公司 | Apparatus and method for increasing biomass pyrolysis and gas production speed and obtaining nano-scale silica material |
| CN106287685A (en) * | 2016-08-22 | 2017-01-04 | 海伦市利民节能锅炉制造有限公司 | Small-sized biomass shaped fuel Circulating Fluidized Bed Hot Water Boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130807 Effective date of abandoning: 20140611 |
|
| RGAV | Abandon patent right to avoid regrant |