CN103983100A - External thermal insulation device for rotary kiln thermal belt - Google Patents
External thermal insulation device for rotary kiln thermal belt Download PDFInfo
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- CN103983100A CN103983100A CN201410244525.XA CN201410244525A CN103983100A CN 103983100 A CN103983100 A CN 103983100A CN 201410244525 A CN201410244525 A CN 201410244525A CN 103983100 A CN103983100 A CN 103983100A
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- heat insulation
- insulation wall
- rotary kiln
- thermal insulation
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Abstract
The invention discloses an external thermal insulation device for a rotary kiln thermal belt. The device comprises lateral thermal insulation walls, two end sealing doors, a triangular rainproof and snowproof thermal insulation sealing ceiling, a fixed support, a bottom thermal insulation wall and a supporting base, wherein the fixed support is of a cuboid structure, the end sealing doors are installed at the two ends of the fixed support, a round hole in a shape matched with the shape of a rotary kiln is formed in each sealing door, the lateral thermal insulation walls are arranged on the two lateral sides of the fixed support, a viewing port made of high-temperature-resistant glass is installed on one lateral thermal insulation wall, the triangular rainproof and snowproof thermal insulation sealing ceiling is arranged on the upper portion of the fixed support, the bottom thermal insulation wall is arranged on the lower portion of the fixed support, and the supporting base is arranged below the bottom thermal insulation wall. The device has the advantages of being simple in structure, convenient to operate, good in thermal insulation effect and remarkable in wind resistance, rain resistance, snow resistance and frost resistance. The device is fixed on a kiln base, can be dismantled when a kiln is overhauled, and is convenient to overhaul and maintain. The device also has the advantages of being long in service life, low in operation and maintenance workload, and low in operation cost.
Description
Technical field
The present invention relates to a kind of external heat preserving device, particularly the high temperate zone of a kind of rotary kiln (salic grog calcining kiln, cement rotary kiln, calcination rotary kiln) (containing combustion zone, clinkering zone, minute ungird, preheating zone) external heat preserving device.
Background technology
In the large industrialized production processes such as aluminium oxide, cement, lime, charcoal element, ore, concentrate, intermediate product need to be carried out to sintering, roasting.For example, in coloured and iron and steel industry process: the need of production of aluminium oxide carries out roasting to the grog in production process, aluminium hydroxide; In charcoal element production process, petroleum coke is calcined; The calcining of clinker in cement production process; In ironmaking processes, produce the pellet of blast furnace ironmaking, external " SL/RN method ", " Krupp method "; Tin and lead etc. are extracted in chloridizing volatilization roasting.In ore dressing process, also need poor iron ore to carry out magnetizing roast, make the original weak magnetic of ore change into ferromagnetism, be beneficial to magnetic separation.Rotary kiln is owing to having the advantages such as adaptability to raw material is strong, utilization rate is high, and product sulfur content is low, quality is even, and output is high, simple in structure, easy to operate, as burning till or calciner and being used widely.
Because the physical and chemical process in rotary kiln is very complicated, existing gas flow, fuel combustion, also have the processes such as heat transmission and material movement.So, in the construction of rotary kiln device and actual production operation, all face many problems.At present, mainly there is following problem: 1. investment is large, compares vertical kiln equipment and capital construction, and investment generally will exceed 10～20%; 2. the steel quantity consumption of specific yield is large, generally than shaft kiln large 30～50%; 3. rotary kiln floor space is large; Power consumption while 4. runing is many; 5. kliner coating radiation loss is large, and energy consumption is high.
In the problems referred to above, 3. the 1.～the be fixed assets one-time investment problem, the 4. can by converter technique and steadily operation and controlling reduce.5. be to belong to the long-standing problem of running, is the most potential, also matter of utmost importance urgently to be resolved hurrily.
Large for kliner coating radiation loss, energy consumption is high.Conventional heat preserving method has 2 kinds at present: a kind of is to be coated with last layer thermostable heat-isolating coating at kiln liner flame retardant coating brick, and approximately 2～5mm is thick, can reduce by 5～15 ℃ of outside kliner coating temperature.Due to after painting coats, the effective internal diameter of rotary kiln, material movement space can be reduced; In rotary kiln running process, heat insulating coatings layer is clashed in the athletic meeting of material repeatedly in addition, and the time one is long, and dope layer can peel off from interior being lining with, and not only loses heat insulation effect, also can corrosion materials.So this kind of method haves much room for improvement.Second method is outside kiln, on sheetmetal, to be coated with last layer thermostable heat-isolating coating, reduces whereby the heat radiation of kiln crust.While not being coated with insulating moulding coating on the outer sheetmetal of kiln, if kiln inner lining refractory is burned and comes off, the outer steel plate of kiln can be rubescent, and operating personnel are very easy to find problem; But thermostable heat-isolating material is painted on after kiln crust, and operating personnel just can't see the actual conditions of the outer steel plate of kiln, easily produce potential safety hazard, affect the normal operation of rotary kiln; Moreover thermostable heat-isolating material is painted on kiln crust, with kiln, turn round, stand to expose to the sun and rain, the time has been grown, and also easily peels off, and loses heat insulation effect.
For these reasons, these the two kinds methods of strengthening insulation are all difficult to be used widely in actual production.
Summary of the invention
The object of this invention is to provide a kind of simple in structure, easy for operation, high insulating effect, do not affect normal operating, long service life, operation maintenance workload is little, operating cost the is low device that is suitable for the outer insulation of rotary kiln.
A kind of rotary kiln of the present invention (salic grog calcining kiln, cement rotary kiln, calcination rotary kiln) high temperate zone (clinkering zone) external heat preserving device, comprises sidepiece heat insulation wall, two ends end part seal door, triangle rain and snow thermal-insulating sealing ceiling, fixed support, bottom heat insulation wall and base for supporting; Fixed support forms a rectangular structure, two ends are provided with two ends end part seal door, on hermatic door, have the circular hole matching with rotary kiln profile, two sides are sidepiece heat insulation walls, wherein on a sidepiece heat insulation wall, the observation panel being comprised of pyroceram is installed, top is triangle rain and snow thermal-insulating sealing ceiling, and bottom is bottom heat insulation wall, is base for supporting below the heat insulation wall of bottom.The described sidepiece heat insulation wall that the observation panel being comprised of pyroceram is installed, consists of resistance to 600 ℃ of above heat insulation glass, possesses the function of radiation proof, thermostable transparent.Operating personnel see through sidepiece heat insulation wall can see kiln exocuticle situation, if having kiln liner tile to be burned or the phenomenon that drops occurs, kliner coating is rubescent, and operating personnel can intuitively see rubescent or other abnormal conditions of kliner coating.Described triangle rain and snow thermal-insulating sealing ceiling inside is made by steel plate, external coated have an insulating that 45～55mm is thick, the reflect heat that the high temperate zone of rotary kiln kliner coating can be radiated on ceiling is gone back, and can prevent external heat conduction and heat radiation by outside effectively insulating heat-insulation layer again.Heat insulation wall inside, described bottom is made by steel plate, outside is also coated with the insulating that 45～55mm is thick, the reflect heat that the high temperate zone of rotary kiln kliner coating can be radiated on the heat insulation wall of bottom is gone back, and can prevent external heat conduction and heat radiation by outside effectively insulating heat-insulation layer again.Described end part seal door inside is made by steel plate, external coated have an insulating that 45～55mm is thick, the reflect heat that the high temperate zone of rotary kiln kliner coating can be radiated on end part seal door is gone back, can prevent external heat conduction and heat radiation by outside effectively insulating heat-insulation layer again, air and extraneous convection heat transfer' heat-transfer by convection in the cavity that can also prevent from being formed by rotary kiln external heat preserving device and rotary kiln body are taken away heat.The main counter-lateral quadrents heat insulation wall of described fixed support and base for supporting, end part seal door, triangle rain and snow thermal-insulating sealing ceiling, bottom heat insulation wall play fixing and supporting role.
Further improvement of the present invention is to change the drift angle angle of isosceles triangle Rainproof heat-insulation sealing ceiling into 140 °～155 °, wherein take again 155 ° as optimum, the ceiling of this drift angle angle is to meet materials reasonable, support strength meets under the prerequisite of production requirement completely, the ceiling two mutual heat loss through radiation in drift angle limit have farthest been reduced, increased from the thermal-radiating reflection of other parts of incubation cavity, so this kind of ceiling can be down to heat loss through radiation minimumly, play good insulation effect.This improves mainly considers that reducing ceiling radiation dispels the heat, is convenient to the discharge of ceiling sleet, increases ceiling intensity, improves the convenience of economy and construction.
In the present invention, the profile of described rain and snow thermal-insulating sealing ceiling is isosceles triangle.Fixed support, base for supporting, the steel plate of rain and snow thermal-insulating sealing ceiling, bottom heat insulation wall, sidepiece heat insulation wall and two ends end part seal door is stainless steel or ordinary steel.
Operation principle of the present invention sketch under:
During normal production, the thermal efficiency of rotary kiln is generally 45% left and right, and remaining heat is consumed in the imperfect combustion in kiln waste gas, kiln discharge flying dust, clinker discharging, kliner coating heat radiation and kiln.Wherein, kliner coating heat radiation accounts for 7% of rotary kiln total heat expenditure.The clinkering zone of rotary kiln is again flame combustion band simultaneously, and the temperature of charge of clinkering zone generally need reach 900～1300 ℃ of ability and carry out quickly sintering and chemical reaction.Now, the temperature of clinkering zone kiln crust often reaches more than 200 ℃, and especially, when kiln inner lining refractory is burnt when de-, kiln crust steel plate is rubescent, shinny, and at this moment kiln crust temperature reaches more than 500 ℃.So, strengthen rotary kiln and be incubated outward, reducing kliner coating heat radiation is the energy-saving and cost-reducing Important Action of rotary kiln.
During normal production, this device is arranged on to the outside of (mainly referring to clinkering zone and preheating decomposition zone), rotary kiln high-temperature region, the sidepiece heat insulation wall of this device, consists of resistance to 600 ℃ of above heat insulation glass, possesses the function of radiation proof, thermostable transparent.Operating personnel see through sidepiece heat insulation wall can see kiln exocuticle situation, if having inner liner of rotary kiln brick to be burned or the phenomenon that drops occurs, kliner coating is rubescent, sees through high temp glass, and operating personnel can intuitively see rubescent or other abnormal conditions of kliner coating.Triangle rain and snow thermal-insulating sealing ceiling inside is made by steel plate, external coated have an insulating that 45～55mm is thick, the reflect heat that the high temperate zone of rotary kiln kliner coating can be radiated on ceiling is gone back, can prevent external heat radiation by outside effectively insulating heat-insulation layer again, its profile is that triangle is mainly the convenience that discharge and the construction of ceiling sleet are convenient in consideration.Heat insulation wall inside, bottom is made by steel plate, and outside is also coated with the insulating that 45～55mm is thick, and the reflect heat that the high temperate zone of rotary kiln kliner coating can be radiated on the heat insulation wall of bottom is gone back, and can prevent external heat radiation by outside effectively insulating heat-insulation layer again.End part seal door inside is made by steel plate, external coated have an insulating that 45～55mm is thick, the reflect heat that the high temperate zone of rotary kiln kliner coating can be radiated on end part seal door is gone back, can prevent external heat radiation by outside effectively insulating heat-insulation layer again, air and the extraneous convective zone that can also reduce greatly in the cavity being formed by rotary kiln external heat preserving device and rotary kiln body are walked heat.The main counter-lateral quadrents heat insulation wall of fixed support and base for supporting, end part seal door, triangle rain and snow thermal-insulating sealing ceiling, bottom heat insulation wall play fixing and supporting role, effectively promoted this device intensity and service life, can be reached more than 8 years continuous service life.
This installs high insulating effect, can save and account for rotary kiln total heat and pay nearly 6% heat, cheap, possess windproof, rainproof, snow defence, anti-frosting function, can reach that 8 years above, operation maintenance workload is little, operating cost is low service life, be suitable for as the outer attemperator in the high temperate zone of rotary kiln (salic grog calcining kiln, cement rotary kiln, calcination rotary kiln) (combustion zone, clinkering zone, minute ungird, preheating zone).
Accompanying drawing explanation
Accompanying drawing 1 is embodiment of the present invention front view.
Accompanying drawing 2 is embodiment of the present invention side view.
Accompanying drawing 3 is sidepiece heat insulation wall figure of the present invention.
Accompanying drawing 4 is two ends of the present invention end part seal door schematic diagrames.
The specific embodiment
The specific embodiment of the present invention, describes in detail below in conjunction with accompanying drawing.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the present invention includes sidepiece heat insulation wall 2, two ends end part seal door 6, triangle rain and snow thermal-insulating sealing ceiling 1, fixed support 3, base for supporting 5, bottom heat insulation wall 4; By fixed support, form a rectangular structure, two ends are provided with two ends end part seal door 6, on hermatic door, have the circular hole matching with rotary kiln profile, two sides are sidepiece heat insulation walls 2, wherein on a sidepiece heat insulation wall, the observation panel being comprised of pyroceram 7 is installed, top is triangle rain and snow thermal-insulating sealing ceiling 1, and bottom is bottom heat insulation wall 4, is base for supporting 5 below the heat insulation wall of bottom.
In the present invention, the sidepiece heat insulation wall that consists of observation panel pyroceram is installed, by resistance to 600 ℃ of above heat insulation glass 7, formed with heat insulation wall framework, and heat insulation wall framework wraps up heat insulation glass.
Further improvement of the present invention is to change the drift angle angle of isosceles triangle Rainproof heat-insulation sealing ceiling 1 into 140 °～155 °, wherein take again 155 ° as optimum, the ceiling of this drift angle angle is to meet materials reasonable, support strength meets under the prerequisite of production requirement completely, the ceiling two mutual heat loss through radiation in drift angle limit have farthest been reduced, increased from the thermal-radiating reflection of other parts of incubation cavity, so this kind of ceiling can be down to heat loss through radiation minimumly, play good insulation effect.Ceiling is made by heat reflection steel plate 8, and steel plate is external coated the insulating 9 that 45～55mm is thick.
In the present invention, the inside of described bottom heat insulation wall and end part seal door is made by 2mm heat reflection steel plate 8, and outside is coated with the insulating 9 that 45～55mm is thick too.
In the present invention, the profile of described rain and snow thermal-insulating sealing ceiling is isosceles triangle.Fixed support 3, base for supporting 5, the steel plate of rain and snow thermal-insulating sealing ceiling 1, bottom heat insulation wall 4, sidepiece heat insulation wall 2 and two ends end part seal door 6 is stainless steel or ordinary steel.
A kind of concrete application of the present invention, be used in the middle of the energy conservation of rotary kiln, without increasing input, can reach reinforcement rotary kiln is incubated outward, reduce kliner coating heat radiation, reduce harmful gas emission, energy-saving and cost-reducing object, generally can save and account for rotary kiln total heat and pay nearly 6% heat, and this device also has easy for operation, high insulating effect, long service life (can reach more than 8 years), operation maintenance workload is little, operating cost is low, do not affect the various features such as normal operating of rotary kiln, the sidepiece heat insulation wall of this device has pyroceram to make in addition, convenient operation personnel observe, can strengthen personnel's processing safety.
Claims (6)
1. an external heat preserving device that is suitable for the high temperate zone of rotary kiln, is characterized in that: comprise sidepiece heat insulation wall, two ends end part seal door, triangle rain and snow thermal-insulating sealing ceiling, fixed support, bottom heat insulation wall and base for supporting; Fixed support forms a rectangular structure, two ends are separately installed with end part seal door, on hermatic door, have the circular hole matching with rotary kiln profile, two sides are sidepiece heat insulation walls, wherein on a sidepiece heat insulation wall, the observation panel being comprised of pyroceram is installed, top is triangle rain and snow thermal-insulating sealing ceiling, and bottom is bottom heat insulation wall, is base for supporting below the heat insulation wall of bottom.
2. a kind of external heat preserving device that is suitable for the high temperate zone of rotary kiln according to claim 1, it is characterized in that: described sidepiece heat insulation wall, two ends end part seal door, triangle rain and snow thermal-insulating sealing ceiling and bottom heat insulation wall are made by the steel plate of 2～5mm, steel plate is external coated the insulating that 45～55mm is thick.
3. a kind of external heat preserving device that is suitable for the high temperate zone of rotary kiln according to claim 1, it is characterized in that: described in the sidepiece heat insulation wall that consists of observation panel pyroceram is installed, by resistance to 600 ℃ of above heat insulation glass and heat insulation wall framework, formed, and heat insulation wall framework wraps up heat insulation glass.
4. a kind of external heat preserving device that is suitable for the high temperate zone of rotary kiln according to claim 1 and 2, is characterized in that: the profile of described triangle rain and snow thermal-insulating sealing ceiling is isosceles triangle.
5. a kind of external heat preserving device that is suitable for the high temperate zone of rotary kiln according to claim 4, is characterized in that: the drift angle angle of described triangle rain and snow thermal-insulating sealing ceiling is 140 °～155 °.
6. a kind of external heat preserving device that is suitable for the high temperate zone of rotary kiln according to claim 1, it is characterized in that: fixed support, base for supporting, the steel plate of rain and snow thermal-insulating sealing ceiling, bottom heat insulation wall, sidepiece heat insulation wall and two ends end part seal door is stainless steel or ordinary steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410244525.XA CN103983100B (en) | 2014-06-05 | 2014-06-05 | A kind of external heat preserving device being suitable for rotary kiln height temperate zone |
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| CN201410244525.XA CN103983100B (en) | 2014-06-05 | 2014-06-05 | A kind of external heat preserving device being suitable for rotary kiln height temperate zone |
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| CN103983100A true CN103983100A (en) | 2014-08-13 |
| CN103983100B CN103983100B (en) | 2015-10-28 |
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| CN201410244525.XA Expired - Fee Related CN103983100B (en) | 2014-06-05 | 2014-06-05 | A kind of external heat preserving device being suitable for rotary kiln height temperate zone |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480298A (en) * | 2014-12-26 | 2015-04-01 | 中铝广西有色崇左稀土开发有限公司 | Ion type rare earth oreburning kiln |
| CN111620710A (en) * | 2020-06-29 | 2020-09-04 | 江苏君耀耐磨耐火材料有限公司 | Composite high-alumina silicon carbide brick for cooperatively treating cement kiln predecomposition zone |
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| CN201043857Y (en) * | 2007-04-13 | 2008-04-02 | 青铜峡铝业集团有限公司 | Novel power supply device for rotary kiln |
| CN101290190A (en) * | 2008-01-25 | 2008-10-22 | 钱建荣 | Cement rotary kiln barrel radiation, reclaiming and utilizing device |
| CN202041070U (en) * | 2011-03-22 | 2011-11-16 | 南京云高新型材料有限公司 | High-temperature roasting device |
| CN102636022A (en) * | 2012-04-28 | 2012-08-15 | 中国科学院广州能源研究所 | Cylinder wall residual heat recovery and heat transfer device of dry method cement rotary kiln |
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2014
- 2014-06-05 CN CN201410244525.XA patent/CN103983100B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5928602A (en) * | 1995-04-25 | 1999-07-27 | Jarkko Linnainmaa | Metal waste processing facility |
| CN1967120A (en) * | 2005-11-15 | 2007-05-23 | 周玉芬 | Dry method cement rotary kiln surface waste-heat utilization method and device |
| CN201043857Y (en) * | 2007-04-13 | 2008-04-02 | 青铜峡铝业集团有限公司 | Novel power supply device for rotary kiln |
| CN101290190A (en) * | 2008-01-25 | 2008-10-22 | 钱建荣 | Cement rotary kiln barrel radiation, reclaiming and utilizing device |
| CN202041070U (en) * | 2011-03-22 | 2011-11-16 | 南京云高新型材料有限公司 | High-temperature roasting device |
| CN102636022A (en) * | 2012-04-28 | 2012-08-15 | 中国科学院广州能源研究所 | Cylinder wall residual heat recovery and heat transfer device of dry method cement rotary kiln |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480298A (en) * | 2014-12-26 | 2015-04-01 | 中铝广西有色崇左稀土开发有限公司 | Ion type rare earth oreburning kiln |
| CN111620710A (en) * | 2020-06-29 | 2020-09-04 | 江苏君耀耐磨耐火材料有限公司 | Composite high-alumina silicon carbide brick for cooperatively treating cement kiln predecomposition zone |
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