CN204177183U - A kind of energy-saving rotary kiln - Google Patents
A kind of energy-saving rotary kiln Download PDFInfo
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- CN204177183U CN204177183U CN201420474349.4U CN201420474349U CN204177183U CN 204177183 U CN204177183 U CN 204177183U CN 201420474349 U CN201420474349 U CN 201420474349U CN 204177183 U CN204177183 U CN 204177183U
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Abstract
The utility model relates to a kind of energy-saving rotary kiln, comprise high temperate zone, intermediate zone and salband, it is characterized in that the structure of each band is identical, specifically: (1) structure is followed successively by energy-saving coatings layer, heat-insulation layer, safe floor and working lining from kiln body box hat; Heat-insulation layer, adopt anchoring hook to run through between safe floor and working lining, anchoring hook is welded on kiln body box hat inwall; (2) 1. described energy-saving coatings layer coats energy-saving coatings at kiln body box hat inner surface, and thickness is 0.3-1mm; 2. described heat-insulation layer is after coating energy-saving coatings, paste 10-20mm thickness nano-thermal-insulating plate; 3. safe floor adopts high-strength light to receive a micron heat insulation prefabricated block, and thickness is 60-100mm, and front adopts bulge-structure, inlays, avoid the changing of the relative positions with working lining; The back side adopts groove structure, and protection nano-thermal-insulating plate is squeezed; 4. working lining is refractory spray castable, and thickness is 100-150mm.The rotary kiln energy-saving effect that the utility model provides is obvious, and annual saving energy 35-36%, reaches environmental protection and energy-conservation dual purpose.
Description
Technical field
The utility model discloses a kind of energy-saving rotary kiln, its design philosophy one is energy-conserving and environment-protective, and two is reduce kiln body case temperature, prevents metal shell high temperature deformation, extends kiln body service life, also improves working environment.
Background technology
Rotary kiln is the capital equipment producing lime, cement, refractory raw material, waste incineration, sponge iron and petroleum coke, and rotary kiln divides high temperate zone, intermediate zone and salband.The temperature in the high temperate zone of lime rotary kiln remains on 1400 ~ 1800 DEG C, the refractory material kiln lining of this part under the lasting rotation of kiln body, be subject to mechanical stress effect and high temperature corrode reaction and very easily damage.The lining-design in current lime rotary kiln height temperate zone has following three kinds: one to be employing 220 ~ 270mm magnesia-spinel brick, skin temperature is at 340 ~ 380 DEG C, cause casing deformation serious, not only kiln body damages, and the diameter to cause because high-temperature expansion is large when high temperature section become result in greatly rotary kiln cannot rotation work and stopping production, to use and the life-span only has year; Two is adopt the form of composite brick to build by laying bricks or stones.Namely leading portion adopts fine and close magnesia spinel batching, and rear section adopts the magnesia spinel plasmogamy material of lightweight.Such all-in-one-piece composite brick processed.Rotary kiln skin temperature or too high in this structure real-world operation process, often more than 350 DEG C, can produce very adverse influence to energy-conservation and safe working environment.If rear section intensity is too low simultaneously, pulverizing in operation process may be caused to cause stopping kiln, have impact on production; Three is that box hat inner surface pastes mineral wool matter, the warming plate of refractory fibre matter, lightening casting material and light-weight insulating brick.Working lining adopts fine and close burnt brick even composite brick.Burnt brick and kiln shell are coupled together through heat-insulation layers such as insulation quilts by anchoring piece.Play the effect of steady job layer.In fact, this structural thermal insulation effect is also undesirable, and kiln shell temperature also reaches 280 ~ 320 DEG C.At high temperature, heat-insulation layer loses insulation effect because intensity is low and crushed, causes later stage kiln shell temperature to raise further simultaneously.The problem high for rotary kiln current kiln shell temperature and service life is low, for this reason, the utility model is intended providing a kind of energy-saving rotary kiln; In fact the utility model does a structure is improved to existing rotary kiln, reaches better heat insulation effect, with economize energy to greatest extent.
Utility model content
The purpose of this utility model is to provide a kind of energy-saving rotary kiln, it is characterized in that:
1, one deck energy-saving coatings is coated with, to reduce thermal-radiating loss at described rotary kiln body box hat inwall.This coating has reflection can ripple and heat insulation effect.Although coating only has about 0.3-1mm, effect of heat insulation is remarkable, relatively can reduce temperature more than 30 DEG C;
2, after coating energy-saving coatings, the thicker nano-thermal-insulating plate of 10-20mm is pasted.Described nano-thermal-insulating plate is one of superfine product of current heat insulation industry.Thermal conductivity factor during 600-800 DEG C is about 0.025w/ (mk), plays extremely excellent heat-proof quality.Effective reduction kiln shell temperature is to about 150 DEG C.Nano-thermal-insulating plate is also known as nano thermal insulation plate.
3, after posting nano-thermal-insulating plate, safe floor is built by laying bricks or stones.Safe floor adopts high-strength light to receive a micron heat insulation prefabricated block.A described high-strength micron heat insulation prefabricated block of receiving, front adopts bulge-structure, makes it to inlay with working lining, and the back side adopts groove structure, protects inner nano-thermal-insulating plate.Such structure has following effect: 1) the high-strength good thermal insulation receiving micron heat insulation prefabricated block, its 1000 DEG C of thermal conductivity factors only have 0.5w/ (mk), and 350 DEG C of thermal conductivity factors only have 0.21w/ (mk).The heat spread out of in kiln like this, is effectively cut off by it, reaches the safe temperature of temperature lower than nano-thermal-insulating plate of nano-thermal-insulating plate.Extend the service life of kiln; 2) when rotary kiln works, kiln lining outwards expands and produces extruding to kiln lining.Receive in micron heat insulation prefabricated block because this structure is equivalent to that nano-thermal-insulating plate is mounted to high-strength light, therefore, high-strength micron heat insulation prefabricated block protection nano-thermal-insulating plate of receiving, prevents and is compressed; 3) because have employed mosaic texture, the changing of the relative positions between different layers in rotary kiln operation process is prevented; 4) described high-strength light receives the thickness of micron prefabricated section is 60-100mm.
It is mullite, corundum-mullite or zirconium mullite that described high-strength light receives the material of micron prefabricated section.
4, working lining adopts the contour alkaline-resisting refractory spray castable of magnesia spinel, can produce following effect: the erosion and the wearing and tearing that 1) are highly resistant to working media.Service life can be significantly improved; 2) automatic arc spraying, easy construction, improves operating efficiency and decreases labour intensity; 3) working face have employed bulge-structure, serves the effect of lifting blade.Homogeneous material, uniform temperature, Rapid Thermal are exchanged, improve productive rate and stabilized product quality performance good result; 4) repair maintenance facilitates, shortens maintenance period and decrease consumption.
Heat-insulation layer, safe floor and working lining adopt anchoring hook to run through, and to keep three layers of synchronous axial system, avoid kiln bulk damage, anchoring hook is welded on kiln body box hat inwall.
The material of described refractory spray castable is that magnesium zirconium is calcareous, magnesia spinel matter, alumina-silica, zirconium matter and the calcareous spray castable of magnesium, and thickness, between 100-150mm, too thickly to be gained in weight, and does not too thinly have satisfied effect of heat insulation.
In a word, a kind of energy-saving rotary kiln that the utility model provides, comprises the design with kiln structure of selecting of energy-saving material.It is characterized in that: 1. rotary kiln body box hat inner surface coats energy-saving coatings, heat-insulation layer adopts nanometer heat insulating material, and safe floor adopts a high-strength micron heat insulation prefabricated block of receiving, and working lining adopts refractory spray castable; 2. heat-insulation layer, safe floor and working lining adopt anchoring hook to be connected, and anchoring hook is welded on kiln body box hat inwall; 3., in order to prevent the changing of the relative positions in kiln body operation process between safe floor and working lining, also protect nano-thermal-insulating plate further simultaneously.High-strength micron heat insulation prefabricated block front of receiving adopts bulge-structure, and make it to inlay with working lining, avoid the changing of the relative positions, the back side adopts groove, plays the effect of protection nano-thermal-insulating plate.Working lining adopts spray castable, employing be mechanical execution, without mould, shorten construction period and decrease labour intensity; 4. have employed bulge-structure at working lining, play the effect of lifting like this, enhance the heat transfer effect of high-temperature hot air-flow and material in kiln, improve rotary system production capacity, improve clinker quality, reduce a ton grog coal consumption.
The utility model not only can reduce rotary kiln body case temperature, reaches the effect of energy-conserving and environment-protective, by the amount of every daily consumption natural gas by 9100 original ~ 9220m
3be reduced to 6400 ~ 6470m
3.Add and improve the rotary kiln life-span thus avoid maintenance or again build kiln, production period does not need to stop kiln, intensification, annual saving energy 35 ~ 36%.Heat-insulation layer, safe floor and working lining can also be made to keep synchronous axial system, avoid the damage to kiln body.
Accompanying drawing explanation
Fig. 1 is existing rotary structure figure; In figure: 1 is heavy magnesia-spinel brick M-MA; 2 is light-weight brick;
Fig. 2 is rotary structure figure of the present utility model; In figure: 3 is energy-saving coatings layer; 4 is nano thermal insulation plate (heat-insulation layer); 5 is high-strength light prefabricated section; 6 is anchoring hook;
Fig. 3 is high-strength light prefabricated section of the present utility model and mosaic texture; In figure: 8 is front bulge-structure, make it to inlay with working lining; 9 is anchoring dog hole, makes to be synchronized with the movement; 10 is back side groove, embedded nano thermal insulation plate.
Detailed description of the invention
Illustrate the utility model substantive distinguishing features and progress further below by specific embodiment, but the utility model is only confined to embodiment by no means.
Embodiment 1
As shown in Figure 2, the utility model is actually the structure providing a kind of follow-on rotary kiln, comprise the design with kiln structure of selecting of energy-saving material, though described rotary kiln is still divided into high temperate zone, intermediate zone and salband, but the structure of each band is with identical, the material difference (table 1) of only working lining use.For high temperate zone, be first coated with one deck energy-saving coatings in kiln body box hat, although coating only has 0.5-1mm, effect of heat insulation is remarkable.Kiln shell theoretical temperatures is 170 DEG C, operable coating material is a lot, serviceability temperature is 600 DEG C, also namely after the sandwich construction of following design, coating material is used in 600 DEG C and following, the GR-600 type heat-insulating and energy-saving material that the representatively property heat-insulating and energy-saving material that the utility model uses is produced for Shandong Ke Xin Materials Co., Ltd, its proportion is 0.6g/cm
3.
After coating energy-saving coatings, the thick nano-thermal-insulating plate of 10-15mm is pasted according to structure described in the utility model, it can significantly reduce kiln shell temperature, described nano-thermal-insulating plate is 0.025w/ (mk) at the thermal conductivity factor of 600-800 DEG C, the nano-thermal-insulating plate thickness recommended is 10mm, leaves 5-10mm gap between nano-thermal-insulating plate.The CR-CDNB type that Hai Kerui furnace refractory Co., Ltd produces fastened by the nano-thermal-insulating plate that the utility model uses, and maximum operation (service) temperature is 800 DEG C, and be not in fact CR-CDNB type heat-insulating material, just thermal conductivity factor is all applicable within the scope of this.
Table 1 inner liner of rotary kiln structural design embodiment
Adjacent with nano-thermal-insulating plate is safe floor; the material that safe floor uses is a high-strength micron heat insulation prefabricated block of receiving; just as shown in Figures 2 and 3; front adopts bulge-structure, makes it to inlay with working lining, and the back side adopts groove structure; protect inner nano-thermal-insulating plate; make it from extruding, front bulge-structure can drive working lining synchronous axial system when rotating, and is equivalent to the effect of the tooth of gear.
Heat-insulation layer, safe floor and working lining adopt anchoring to run through, and anchoring hook is welded on kiln body box hat wall, when kiln body box hat rotates, drives prefabricated section to rotate in anchoring.The projection of prefabricated section is preposition again pins down working lining rotation.Working lining and safe floor are inlayed, and therefore guarantee heat-insulation layer, safe floor and working lining synchronous axial system, thus effectively prevent three fault positions slips.
The high-strength micron material for heat insulation prefabricated block of receiving that safe floor uses is mullite, corundum-mullite or zirconium mullite.Its effect is the heat transfer reducing kiln lining, protection nano thermal insulation plate.There is part to be nanoscale or micron-sized in the raw material used, mainly play insulation effect.
Working lining uses refractory spray castable.Usually, the compound that described castable refractory is made up of refractory aggregate (granularity >0.074mm) and powder (granularity <0.074mm), bonding agent, additive (as water reducer, promoter) etc., its material is the spray castable that magnesium zirconium is calcareous, magnesia spinel matter, alumina-silica, zirconium matter and magnesium are calcareous.
The thickness of safe floor is between 60-100mm, and that conventional is 70-90mm, and it and between nano-thermal-insulating plate and working lining, thickness is because mosaic texture, so there is a matching problem to each other, and each layer thickness listed by table 1 is applicable to actual matching thickness.
Owing to employing the inner lining structure shown in table 1 and corresponding material, a kind of energy-saving rotary kiln that the utility model is provided, energy-saving effect is obvious:
Be of a size of Ф 4800 × 70000 according to certain company's rotary kiln, natural gas saved by an annual rotary kiln is 618294m
3, according to the unit price 3 yuan of every cubic natural gas, annual direct economy cost can save 1,800,000 yuan, if five all change energy-conservation rotary kiln into, annual by energy-conservation more than 900 ten thousand yuan, also has important social enviroment protection benefit in addition.
Claims (4)
1. an energy-saving rotary kiln, comprises high temperate zone, intermediate zone and salband, it is characterized in that the structure of each band is identical, specifically:
(1) structure is followed successively by energy-saving coatings layer, heat-insulation layer, safe floor and working lining from kiln body box hat; Heat-insulation layer, adopt anchoring hook to run through between safe floor and working lining, anchoring hook is welded on kiln body box hat inwall;
(2) 1. described energy-saving coatings layer coats energy-saving coatings at kiln body box hat inner surface, and thickness is 0.3-1mm;
2. described heat-insulation layer is after coating energy-saving coatings, paste 10-20mm thickness nano-thermal-insulating plate;
3. safe floor adopts high-strength light to receive a micron heat insulation prefabricated block, and thickness is 60-100mm, and front adopts bulge-structure, inlays, avoid the changing of the relative positions with working lining; The back side adopts groove structure, and protection nano-thermal-insulating plate is squeezed;
4. working lining is refractory spray castable, and thickness is 100-150mm.
2., by rotary kiln according to claim 1, it is characterized in that:
A) energy-saving coatings layer thickness is 0.5-1mm;
B) it is 70-90mm that the high-strength light that safe floor uses receives micron thickness of heat insulation prefabricated block;
C) the refractory spray castable thickness that working lining uses is 100-120mm.
3., by rotary kiln according to claim 1, it is characterized in that staying in 5-10mm gap between nano-thermal-insulating plate.
4., by rotary kiln according to claim 1, it is characterized in that safe floor front bulge-structure drives working lining synchronous axial system when rotating, being equivalent to the tooth effect of gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474349.4U CN204177183U (en) | 2014-08-21 | 2014-08-21 | A kind of energy-saving rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474349.4U CN204177183U (en) | 2014-08-21 | 2014-08-21 | A kind of energy-saving rotary kiln |
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| Publication Number | Publication Date |
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| CN204177183U true CN204177183U (en) | 2015-02-25 |
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| CN201420474349.4U Expired - Fee Related CN204177183U (en) | 2014-08-21 | 2014-08-21 | A kind of energy-saving rotary kiln |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792155A (en) * | 2015-04-27 | 2015-07-22 | 云南源鑫炭素有限公司 | Method for installing composite type refractory lining of rotary kiln |
-
2014
- 2014-08-21 CN CN201420474349.4U patent/CN204177183U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792155A (en) * | 2015-04-27 | 2015-07-22 | 云南源鑫炭素有限公司 | Method for installing composite type refractory lining of rotary kiln |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20210821 |