CN202156936U - Sintering rotary kiln device using coal ash to produce alumina in low temperature-ammonia method - Google Patents
Sintering rotary kiln device using coal ash to produce alumina in low temperature-ammonia method Download PDFInfo
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- CN202156936U CN202156936U CN2011202639685U CN201120263968U CN202156936U CN 202156936 U CN202156936 U CN 202156936U CN 2011202639685 U CN2011202639685 U CN 2011202639685U CN 201120263968 U CN201120263968 U CN 201120263968U CN 202156936 U CN202156936 U CN 202156936U
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- rotary kiln
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Abstract
The utility model relates to a sintering rotary kiln device using coal ash to produce alumina in a low temperature-ammonia method. The sintering rotary kiln device comprises a rotary kiln; the rotary kiln is provided with a first gas outlet, a second gas outlet and a discharge hole; the head of the kiln is connected with a blower, a flue gas mixing tank and an air stove sequentially, and the second gas outlet is communicated with the flue gas mixing tank through a flue gas circulating pipe; the tail of the kiln is connected a spiral feeding machine and a feeding storage bin sequentially; the first gas outlet is connected with a first-stage cyclone dust collector, a second-stage cyclone dust collector, a draught fan and an absorption tower in sequence; and the discharge hole is connected with an outlet chute and a dissolving-out groove in sequence; and the rotary kiln is internally provided with a material scraping plate and externally connected with a rotary motor and a speed reducer. Through the sintering rotary kiln device, the capacity of the rotary kiln device can be effectively improved, the service life of the rotary kiln device can be effectively prolonged, the rotary kiln device can be used as a core device adopting low temperature-ammonia method to produce the alumina in industrial production and leads the production process to be at an optimum state regularly, and the aims of high quality, high efficiency and low consumption can be achieved.
Description
Technical field
The utility model relates to a kind of sintering rotary kiln device, relates in particular to a kind of low temperature ammonia process is produced aluminum oxide with flyash sintering rotary kiln device.
Background technology
Rotary kiln is meant rotation calcination kiln (being commonly called as rotary kiln).The application of rotary kiln originates from manufacture of cement, and Britain cement worker A Sipu had invented the native shaft kiln of periodical operation in 1824; German Di thatch generation had been invented the multilayer shaft kiln of operate continuously in 1883; 1885 British Lan Samu (ERansome) have invented rotary kiln, after English, U.S.A obtain patent, it are put into production, obtain considerable economic very soon.The invention of rotary kiln makes Cement industry develop rapidly, has also promoted the research that people use rotary kiln simultaneously, and very fast rotary kiln is widely applied to many industrial circles, and more and more important in these are produced, and becomes the nucleus equipment of corresponding enterprise production.
Rotary kiln in process of production, material added from high-end (the claiming the kiln tail again) of kiln; Fuel is from low side (claiming kiln hood again) ejection, and flue gas is by high-end discharge.Because cylinder of rotary kiln tilts to install, when the kiln body turned round, material was moving down when circumferentially rolling vertically in the kiln; Material through the hot gas flow countercurrent flow that sprays into the kiln tail, obtains heating in moving process; Through physics and chemical transformation, become qualified product and discharge from low side.Rotary kiln has purposes widely in China, and China is the country that uses rotary kiln quantity maximum in the world, and flourish along with colored metallurgical industrial and building material industry, and more and more to the demand of rotary kiln, specification is also increasing.Rotary kiln weigh usually kiloton, grew hundred meters; Supporting is organized several 4～9 grades; Be a kind of heavy duty, high pulling torque, many fulcrums, indeterminate operational system; And be the nucleus equipment in metallurgy, cement, the refractory materials production, guarantee that its safety, operation efficiently are the keys that corresponding manufacturing enterprise increases economic efficiency.Also do not utilize at present heat power plant's waste residue and pulverized fuel ash to adopt low temperature ammonia process sintering method to produce the sintering rotary kiln device of aluminum oxide.
The utility model content
The utility model provides a kind of low temperature ammonia process to produce the sintering rotary kiln device of aluminum oxide with flyash to the deficiency of also not utilizing at present heat power plant's waste residue and pulverized fuel ash to adopt low temperature ammonia process sintering method to produce the sintering rotary kiln device of aluminum oxide.
The technical scheme that the utility model solves the problems of the technologies described above is following: the sintering rotary kiln device that a kind of low temperature ammonia process is produced aluminum oxide with flyash comprises the rotary kiln body; Said rotary kiln body one end is a kiln hood; Kiln hood is a feed zone; The other end is the kiln tail, and the kiln tail is a discharging section, and the height of feed zone is higher than the height of discharging section; Said rotary kiln body has first pneumatic outlet near the top of kiln tail, and the bottom has second pneumatic outlet; Said rotary kiln body has discharge port near the bottom of kiln hood; Said kiln hood place is connected with gas blower, is connected with the flue gas mixing tank on the said gas blower, is connected with hotblast stove on the said flue gas mixing tank, and said second pneumatic outlet is connected through flue gas recirculation pipe and flue gas mixing tank; Said kiln tail place is connected with screw feeder, and said screw feeder top is connected with the charging warehouse; Said first gas outlet is connected with the one-level tornado dust collector, and said one-level tornado dust collector link to each other with second cyclone dust extractor, and said second cyclone dust extractor links to each other with induced draft fan, and said induced draft fan is connected on the absorption tower; Said discharge port place is connected with exit chute, and said exit chute is connected on the stripping groove; The inside of said rotary kiln body is provided with material scraping plate, is connected with rotary electric machine and step-down gear on the said rotary kiln body.
On the basis of technique scheme, the utility model can also be done following improvement.
Further, said flue gas recirculation pipe is provided with the smoke backflow valve.
Further, the bottom of said rotary kiln body is provided with kiln body bearing.
Further, the two ends of said material scraping plate are fixed on the kiln hood and the kiln tail place of rotary kiln body respectively through chain, and the spacing of the inwall of said material scraping plate and rotary kiln body is 4～10 centimetres.
Further, have an angle a between the kiln body axis of said rotary kiln body and the horizontal plane, wherein, 0 < a≤5 °.
Further, be separately installed with thermocouple temperature measuring apparatus between said kiln hood, kiln tail, kiln hood and the kiln tail and on the flue gas mixing tank.
Further, the ingress of said kiln hood, kiln tail and induced draft fan is separately installed with U-tube manometer.
Further, online oxygen appearance and the survey ammonia appearance of containing is installed on the said kiln hood.
Further, said kiln hood, kiln tail, gas blower, flue gas mixing tank and flue gas recirculation pipe all are coated with adiabator layer outward.
Further, said exit chute and stripping groove are wholely set to form has the structure of air-tight state, is provided with whipping appts in this structure.
The beneficial effect of the utility model is: the sintering rotary kiln device that the utility model low temperature ammonia process is produced aluminum oxide with flyash helps grog steady quality behind stable, energy-conservation, the sintering of rotary kiln thermal regulation; Can effectively improve rotary kiln production capacity and work-ing life; Becoming flyash adopts the low temperature ammonia process to produce aluminum oxide industry production nucleus equipment; Make production process often be in optimum regime, reach high-quality, efficient, low consumed purpose.
Description of drawings
Fig. 1 is the utility model low temperature ammonia process is produced the sintering rotary kiln device of aluminum oxide with flyash a structural representation one;
Fig. 2 is the utility model low temperature ammonia process is produced the sintering rotary kiln device of aluminum oxide with flyash a structural representation two.
Embodiment
Below in conjunction with accompanying drawing the principle and the characteristic of the utility model are described, institute gives an actual example and only is used to explain the utility model, is not the scope that is used to limit the utility model.
Shown in Fig. 1 and 2, the sintering rotary kiln device that said low temperature ammonia process is produced aluminum oxide with flyash comprises rotary kiln body 1, and said rotary kiln body 1 one ends are kiln hood 18; Kiln hood 18 is a feed zone; The other end is the kiln tail, and the kiln tail is a discharging section, and the height of feed zone is higher than the height of discharging section; Said rotary kiln body has first pneumatic outlet near the top of kiln tail, and the bottom has second pneumatic outlet; Said rotary kiln body has discharge port near the bottom of kiln hood 18; Said kiln hood place is connected with gas blower 4, is connected with flue gas mixing tank 3 on the said gas blower 4, is connected with hotblast stove 2 on the said flue gas mixing tank 3, and said second pneumatic outlet is connected through flue gas recirculation pipe 11 and flue gas mixing tank 3; Said kiln tail place is connected with screw feeder 5, and said screw feeder 5 tops are connected with charging warehouse 14; Said first gas outlet is connected with one-level tornado dust collector 6, and said one-level tornado dust collector 6 link to each other with second cyclone dust extractor 7, and said second cyclone dust extractor 7 links to each other with induced draft fan 8, and said induced draft fan 8 is connected on the absorption tower 9; Said discharge port place is connected with exit chute 10, and said exit chute 10 is connected on the stripping groove 12; The inside of said rotary kiln body 1 is provided with material scraping plate 15, is connected with rotary electric machine and step-down gear 16 on the said rotary kiln body 1.Said flue gas recirculation pipe 11 is provided with smoke backflow valve 13.The bottom of said rotary kiln body 1 is provided with kiln body bearing 17.The two ends of said material scraping plate 15 are fixed on the kiln hood 18 and kiln tail place of rotary kiln body 1 respectively through chain, the spacing of the inwall of said material scraping plate 15 and rotary kiln body 1 is 4～10 centimetres.Have an angle a between the kiln body axis of said rotary kiln body 1 and the horizontal plane, wherein, 0 < a≤5 °.Between said kiln hood 18, kiln tail, kiln hood 18 and the kiln tail and be separately installed with thermocouple temperature measuring apparatus on the flue gas mixing tank 3, be reference with kiln hood and kiln afterbody temperature usually in the production control, judge the height of sintering temperature.The kiln hood position is low, and kiln tail position is high.The ingress of said kiln hood 18, kiln tail and induced draft fan 8 is separately installed with U-tube manometer, and the kiln rear is in and is negative pressure state.Online oxygen appearance and the survey ammonia appearance of containing is installed on the said kiln hood 18.Said exit chute 10 is wholely set to form with stripping groove 12 has the structure of air-tight state, is provided with whipping appts in this structure.Said kiln hood 18, kiln tail, gas blower 4, flue gas mixing tank 3 and flue gas recirculation pipe 11 outer pure aluminium silicate, Calucium Silicate powder and the rock wool heat-preservation material layers of all being coated with.
Said hotblast stove 2 provides the flue gas thermal source of 550～800 ° of flue-gas temperatures, and flue gas and kiln body and material carry out heat passage, make material reach temperature of reaction.Through control kiln hood gas blower, kiln tail induced draft fan and flue gas recirculation tube valve aperture control rotary kiln temperature.In actual production process, kiln hood portion temperature generally is controlled in 500～600 ℃ of scopes and generally is controlled in 270～300 ℃ of scopes with kiln afterbody temperature.
This rotary kiln type belongs to the continuity kiln; Raw material is main with flyash and ammonium sulfate; With flyash and exsiccated ammonium alum according to a certain percentage compound as raw material; By the higher kiln tail end feeding in position, fuel and hot blast then spray in the kiln from lower kiln hood compound through feeding serew, and material and hot gas flow are done opposite-oriented movement.Along with the rotation of kiln body, material is brought to certain height, fallen by the action of gravity of self; Along with the continuous rotation of kiln body, slippage is moving forward along the kiln wall for material, delivers to kiln hood from the kiln tail; In whole motion process, constantly absorb the heat that fuel discharged, thereby accomplished whole physics, chemical transformation, be discharged into discharging chute by rotary kiln end; Be cooled to below 80 ℃; Send the stripping groove through skewed slot again, the outlet flue gas then is sent to the cyclone dust collection of kiln tail I and II under the effect of induced draft fan, and the waste gas after gathering dust enters the absorption tower.Sintering theory is flyash and the ammonium sulfate compound that contains certain moisture content, under the high temperature action in rotary kiln, is converted into the grog bead through oven dry, dehydration, sintering reaction and three processes of cooling.Behind sintering, draw off from kiln hood, after cooling, go into feed bin again, kiln temperature is easy to control, and burning zone temperature can float about 350～500 ℃ as requested, can satisfy the production requirement of different calcining systems.This kiln type output is big, production cost is low, is suitable for producing the hot flue gas of flyash low temperature ammonia process production alumina technology and sends kiln hood by hotblast stove to by gas blower, and induced draft fan is extracted into absorption tower from the kiln tail through fly-ash separator with residual air and absorbs, and reclaims the ammonia utilization.Its solubility rate depends primarily on the time that sintering temperature control, flue-gas temperature control and material stop in kiln.
The clinker quality that uses the utility model flyash low temperature ammonia process production revolution klining to go out is good, solubility rate is high (the standard solubility rate generally can reach more than 98%); This kiln can generate even-grained spherical grog (3～9mm); Improved utilization ratio of raw materials and digesting efficiency of alumina, thus reach be easy to control, labor condition is good, output is big, be suitable for large-scale industrialization production.
The above is merely the preferred embodiment of the utility model, and is in order to restriction the utility model, not all within the spirit and principle of the utility model, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (10)
1. a low temperature ammonia process is produced the sintering rotary kiln device of aluminum oxide with flyash, it is characterized in that, comprises the rotary kiln body; Said rotary kiln body one end is a kiln hood, and kiln hood is a feed zone, and the other end is the kiln tail; The kiln tail is a discharging section, and the height of feed zone is higher than the height of discharging section; Said rotary kiln body has first pneumatic outlet near the top of kiln tail, and the bottom has second pneumatic outlet; Said rotary kiln body has discharge port near the bottom of kiln hood; Said kiln hood place is connected with gas blower, is connected with the flue gas mixing tank on the said gas blower, is connected with hotblast stove on the said flue gas mixing tank, and said second pneumatic outlet is connected through flue gas recirculation pipe and flue gas mixing tank; Said kiln tail place is connected with screw feeder, and said screw feeder top is connected with the charging warehouse; Said first gas outlet is connected with the one-level tornado dust collector, and said one-level tornado dust collector link to each other with second cyclone dust extractor, and said second cyclone dust extractor links to each other with induced draft fan, and said induced draft fan is connected on the absorption tower; Said discharge port place is connected with exit chute, and said exit chute is connected on the stripping groove; The inside of said rotary kiln body is provided with material scraping plate, is connected with rotary electric machine and step-down gear on the said rotary kiln body.
2. low temperature ammonia process according to claim 1 is characterized in that with the sintering rotary kiln device of flyash production aluminum oxide said flue gas recirculation pipe is provided with the smoke backflow valve.
3. low temperature ammonia process according to claim 1 is characterized in that with the sintering rotary kiln device of flyash production aluminum oxide the bottom of said rotary kiln body is provided with kiln body bearing.
4. low temperature ammonia process according to claim 1 is produced the sintering rotary kiln device of aluminum oxide with flyash; It is characterized in that; The two ends of said material scraping plate are fixed on the kiln hood and the kiln tail place of rotary kiln body respectively through chain, the spacing of the inwall of said material scraping plate and rotary kiln body is 4～10 centimetres.
5. low temperature ammonia process according to claim 1 is characterized in that having an angle a between the kiln body axis of said rotary kiln body and the horizontal plane with the sintering rotary kiln device of flyash production aluminum oxide, wherein, and 0 < a≤5 °.
6. low temperature ammonia process according to claim 1 is characterized in that with the sintering rotary kiln device of flyash production aluminum oxide, is separately installed with thermocouple temperature measuring apparatus between said kiln hood, kiln tail, kiln hood and the kiln tail and on the flue gas mixing tank.
7. low temperature ammonia process according to claim 1 is characterized in that with the sintering rotary kiln device of flyash production aluminum oxide the ingress of said kiln hood, kiln tail and induced draft fan is separately installed with U-tube manometer.
8. low temperature ammonia process according to claim 1 is characterized in that with the sintering rotary kiln device of flyash production aluminum oxide, and online oxygen appearance and the survey ammonia appearance of containing is installed on the said kiln hood.
9. low temperature ammonia process according to claim 1 is characterized in that with the sintering rotary kiln device of flyash production aluminum oxide said kiln hood, kiln tail, gas blower, flue gas mixing tank and flue gas recirculation pipe all are coated with adiabator layer outward.
10. low temperature ammonia process according to claim 1 is characterized in that with the sintering rotary kiln device of flyash production aluminum oxide said exit chute and stripping groove are wholely set to form has the structure of air-tight state, is provided with whipping appts in this structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202639685U CN202156936U (en) | 2011-07-25 | 2011-07-25 | Sintering rotary kiln device using coal ash to produce alumina in low temperature-ammonia method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202639685U CN202156936U (en) | 2011-07-25 | 2011-07-25 | Sintering rotary kiln device using coal ash to produce alumina in low temperature-ammonia method |
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| CN202156936U true CN202156936U (en) | 2012-03-07 |
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| CN2011202639685U Expired - Lifetime CN202156936U (en) | 2011-07-25 | 2011-07-25 | Sintering rotary kiln device using coal ash to produce alumina in low temperature-ammonia method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636021A (en) * | 2012-04-11 | 2012-08-15 | 中钢集团马鞍山矿山研究院有限公司 | Efficient and energy-saving magnetizing roasting rotary kiln |
| CN103214014A (en) * | 2013-04-22 | 2013-07-24 | 河北科技大学 | Reaction device and method for producing aluminum oxide |
| CN103771464A (en) * | 2012-10-18 | 2014-05-07 | 沈阳铝镁设计研究院有限公司 | Fly ash clinker sintering apparatus |
| CN103771465A (en) * | 2012-10-18 | 2014-05-07 | 沈阳铝镁设计研究院有限公司 | Fly ash clinker sintering technology |
| CN106702164A (en) * | 2017-01-05 | 2017-05-24 | 北京科技大学 | Method and device of recovering valuable metals in steps from waste electronic circuit board particles |
-
2011
- 2011-07-25 CN CN2011202639685U patent/CN202156936U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636021A (en) * | 2012-04-11 | 2012-08-15 | 中钢集团马鞍山矿山研究院有限公司 | Efficient and energy-saving magnetizing roasting rotary kiln |
| CN103771464A (en) * | 2012-10-18 | 2014-05-07 | 沈阳铝镁设计研究院有限公司 | Fly ash clinker sintering apparatus |
| CN103771465A (en) * | 2012-10-18 | 2014-05-07 | 沈阳铝镁设计研究院有限公司 | Fly ash clinker sintering technology |
| CN103771465B (en) * | 2012-10-18 | 2015-11-18 | 沈阳铝镁设计研究院有限公司 | A kind of flyash clinkersintering method |
| CN103771464B (en) * | 2012-10-18 | 2016-02-10 | 沈阳铝镁设计研究院有限公司 | A kind of flyash clinkersintering device |
| CN103214014A (en) * | 2013-04-22 | 2013-07-24 | 河北科技大学 | Reaction device and method for producing aluminum oxide |
| CN103214014B (en) * | 2013-04-22 | 2015-12-09 | 河北科技大学 | A kind of reaction unit and method thereof of producing aluminum oxide |
| CN106702164A (en) * | 2017-01-05 | 2017-05-24 | 北京科技大学 | Method and device of recovering valuable metals in steps from waste electronic circuit board particles |
| CN106702164B (en) * | 2017-01-05 | 2019-01-01 | 北京科技大学 | Recycle the method and device of valuable metal step by step from waste electronic wiring board particle |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120307 |
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| CX01 | Expiry of patent term |