CN104089480A - Shuttle kiln - Google Patents
Shuttle kiln Download PDFInfo
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- CN104089480A CN104089480A CN201410355591.4A CN201410355591A CN104089480A CN 104089480 A CN104089480 A CN 104089480A CN 201410355591 A CN201410355591 A CN 201410355591A CN 104089480 A CN104089480 A CN 104089480A
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- kiln
- infrared radiation
- high temperature
- cermet
- temperature resistant
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Abstract
The invention provides a shuttle kiln which is high in energy utilization and long in service life. The shuttle kiln comprises a kiln body, multiple high-temperature-resistant infrared radiation plates are detachably installed on the inner wall of a kiln cavity of the kiln body, one face, facing the interior of the kiln cavity, of each high-temperature-resistant infrared radiation plate is provided with an infrared radiation layer, and one face, facing the wall of the kiln cavity, of each high-temperature-resistant infrared radiation plate is provided with a heat insulation layer. The infrared radiation layers are made of corundum-mullite plates or mullite plates, and the heat insulation layers are ceramic fiber blankets. The high-temperature-resistant infrared radiation plates provided with the heat insulation layers are installed on the inner wall of the kiln, so that absorbed energy evenly radiates products needing sintering. The heat insulation layers are arranged on the back faces of the radiation plates to stop heat from being transferred to the wall of the kiln, and the energy can be transferred to the products needing sintering through radiation as much as possible. Due to the high-temperature-resistant infrared radiation plates, the service life of the kiln is prolonged, economic benefits are increased, the requirement for the quality grade of fireproof material of the wall of the kiln can be lowered, and cost for building the kiln can be reduced.
Description
Technical field
The present invention relates to a kind of shuttle kiln.
Background technology
China's Industrial Stoves and Industrial Boiler are the main bodys of energy resource consumption, and the Industrial Stoves ubiquity thermal efficiency is low, the phenomenon that energy waste is larger.Low for the ubiquitous effective utilization rate of energy of Industrial Stoves, the problem that energy waste is larger, general taked Main Energy-saving Measures is both at home and abroad: (1) adopts the light weight type insulation material of high insulating effect as far as possible; (2) adopt far infrared energy-saving spray painting technology; (3) flue gas heat recovery; (4) black body radiation element power-saving technology.
Traditional approach is to adopt less light material and the insulation material of thermal capacitance to build kiln, to reduce accumulation of heat and radiation loss.This power-economizing method, just heat " is blocked up " in kiln thorax, do not need the available heat of the product of sintering to absorb, do not change " diffuse reflection " state of heat ray, do not solve the problem whether heat ray puts in place, so need the available heat of product of sintering still very low.People by heat Balance Calculation or test, find that heat accumulation of kiln and radiation loss are up to 60%～70%, and need the available heat only 25%～30% of the product of sintering.
The thermal efficiency of heat accumulating type shuttle kiln obtains raising by a relatively large margin; The application of infrared radiation coating subsequently, the available heat that has solved the product that needs sintering on the basis of high thermal effect absorbs problem, has further improved the thermal efficiency.
In industry kiln kiln thorax, conduct heat and have: the convection heat transfer' heat-transfer by convection of the product radiation of Fire Radiation, burning, the radiation of the furnace wall surface of solids and furnace gas radiation and furnace gas.In simple terms, participate in the 3 kinds of basic objects that have of the interior heat exchanging process of kiln: furnace gas, Yao Bi, heating and calcining thing.At 800 ℃, be that heat transfer between kiln gas and heating object mainly relies on convection heat transfer' heat-transfer by convection below; Between 800 ℃～1000 ℃, be to rely on convection current and radiation, when temperature, the heat conduction between kiln gas and heating object is main during higher than 1000 ℃ relies on far infrared radiation heat exchange simultaneously, and the heat 90% that heating object absorbs realizes by radiation heat transfer.Most of industry kiln kiln thorax is interior by refractory brick, castable refractory, and fire-resistant light insulating brick or ceramic fibre are built by laying bricks or stones.These refractory materials have fire resistance, under high temperature, intensity is high, the characteristics such as stability height can meet kiln needs, but the far infrared transmissivity of these refractory materials generally in 0.35 left and right (as at 1100 ℃: chamotte brick: 0.35～0.65, mullite 0.4, aluminium oxide 0.18～0.52, refractory fibre 0.35), and the emissivity of coatings capable of preventing from far infrared radiation is 0.85～0.95.Infrared radiation heat transfer is exactly the radianting capacity heating object that utilizes infrared ray uniqueness, object is heated, at a certain temperature, heating object gives off the infrared waves with certain penetration capacity, make heating object generation molecular oscillation, produce energy level transition, the infrared ray of the certain wave band of radiation, thus produce heat.Its feature one is heat absorption object thermally equivalent, the 2nd, and heat from inside to outside, thereby reduced the heat time, improve energy utilization rate.
The basic weakness of far infrared coating technology is that coating is easily aging, and continuous efflorescence is in actual use dropped or by air-flow erosion, thermal infrared emissivity progressively decays, and loses infra red radiation function, and thermal effect is passed decline in time.
Summary of the invention
The object of the invention is to propose that a kind of energy utilization rate is high, the shuttle kiln of long service life.
Shuttle kiln of the present invention comprises kiln body, key is that the kiln thorax inwall of described kiln body is removably provided with some high temperature resistant infrared radiation panels, described high temperature resistant infrared radiation panel is provided with infra-red radiation layer towards the one side of kiln thorax inside, and high temperature resistant infrared radiation panel is provided with thermal insulation layer towards the one side of kiln thorax wall; Described infra-red radiation layer is made by corundum-mullite plate or mullite plate, and described thermal insulation layer is ceramic fiber blanket.
High temperature resistant infrared radiation panel at kiln inwall mounting strap band thermal insulation layer, its method phase total emissivity is 0.85～0.98, and adjusting angle as required, energy even is radiated on the product that needs sintering, also can and need the product of sintering to stack design infra-red radiation plate structure and radian according to kiln type simultaneously, the energy even absorbing is radiated on the product that needs sintering.The high temperature resistant infrared radiation panel back side has thermal insulation layer, can make energy as much as possible by radiation delivery to the product that needs sintering, its back temperature is compared low 300～500 ℃ with temperature in stove; High temperature resistant infrared radiation panel can increase the service life, and fiber liner particularly can the chalk retardation time, can solve airflow scouring damaged fiber liner equitemperature simultaneously, significantly extends kiln service life, increases economic efficiency.And, high temperature resistant infrared radiation panel is installed on furnace wall and can be slowed down the thermal shock that compact refractory material causes by flue gas rapid heat cycle and damage, can reduce the quality requirement of refractory material, reduce and build kiln cost.High temperature resistant infrared radiation panel long service life, can reach 5～10 years, suitable with the projected life of Industrial Stoves and boiler, even higher.In actual use, far infrared radiation ability is unattenuated for Far infrared radiant panel, guarantees for a long time the energy-efficient of shuttle kiln, and synthesis energy saving efficiency reaches 15～30%, compared with the prior art has further and improves.Adopt corundum-mullite plate or mullite plate as infra-red radiation layer, applicable to the high temperature of 1600 degree, be applicable to very much the shuttle kiln of high temperature.
Further, the compound anchor nails of cermet of utilizing described high temperature resistant infrared radiation panel is fixed on kiln thorax inwall, and the compound anchor nails of described cermet is three-decker, and skin is earthenware, internal layer is metal or cermet, the fine and close castable of intermediate layer for internal layer is wrapped up completely.Traditional metal anchorage, because oxidation-resistance property is poor, cannot meet the long-time application under hot environment, and ceramic anchoring piece is because the fragility problem of ceramic material own cannot guarantee to hang security reliability; And the compound anchor nails of cermet in the present invention, its skin is highly heatproof and shockproof dense ceramic tube, 1100 ℃ of water-cooleds are greater than 30 times, internal layer is refractory metal or cermet, there is certain resistance to high temperature oxidation characteristic, centre is high temperature resistant fine and close castable, it is sealant, have high strength simultaneously, can be used as structural support layers and use, room temperature compressive resistance is greater than 120MPa, rupture strength reaches 20MPa, can prevent refractory metal part or cermet oxidation, the compound anchor nails of above-mentioned cermet has multiple protective action, guarantees to hang stable and long-life; In three layers, any individual layer or two-layer damage all can not have influence on suspension security reliability, only have three layers to be damaged simultaneously and just likely to have influence on suspension, have improved reliability.
Further, be the connective stability between each layer of reinforcement metal Ceramic Composite anchor nails, the skin of the compound anchor nails of described cermet has internal and external threads, and the internal layer of the compound anchor nails of cermet has external screw thread; Or the skin of the compound anchor nails of described cermet has external screw thread, and the internal layer of the compound anchor nails of cermet has external screw thread.
Further, described every high temperature resistant infrared radiation panel all utilizes five compound anchor nails of cermet to be fixed on kiln thorax inwall, wherein four compound anchor nails of cermet are distributed in four angles of high temperature resistant infrared radiation panel, and all the other compound anchor nails of cermet are positioned at the central authorities of high temperature resistant infrared radiation panel.Above-mentioned five compound anchor nails of cermet have formed the figure by four triangle splicings, and wherein the compound anchor nails of any two cermets is damaged and also can not affected the equal suspension safety of high temperature resistant infrared radiation panel.
Further, the normal direction of described infra-red radiation layer, over against the product that needs sintering in kiln thorax, as much as possible the energy even being absorbed is radiated on the product that needs sintering, improves capacity usage ratio.
Further, on described high temperature resistant infrared radiation panel, there is hollow convex to go out cavity and/or fin, to absorb the energy in more flue gas, and this energy is reflected back to heating workpiece.
Further, described high temperature resistant infrared radiation panel material is by 90 ~ 95 parts of mullites or corundum-mullite, 5 ~ 10 parts of composite mixed high infrared radiation material phosphor composings; Described composite mixed high infrared radiation material powder is by Fe
2o
355 ~ 75 parts, 15 ~ 30 parts of NiO, 5 ~ 10 parts of ZnO, MnO
20.5 ~ 1.5 part, 0.5 ~ 2 part of CoO, Cr
2o
33 ~ 5 parts, CeO
20.05 ~ 0.2 part, Er
2o
30.05 ~ 0.2 part, Nd
2o
30.05 ~ 0.2 part, Yb
2o
30.05 ~ 0.2 part of composition, adopts blend to grind, fill after saggar high temperature sintering, then forms through broken ball milling.
Shuttle kiln of the present invention is provided with dismountable high temperature resistant infrared radiation panel, installs and convenient disassembly, and long service life, fixing reliable, capacity usage ratio and the service life that can greatly improve shuttle kiln, there is good promotional value.
Accompanying drawing explanation
Fig. 1 is the kiln thorax structural representation of shuttle kiln of the present invention.
Fig. 2, the 3rd, the mounting structure schematic diagram of high temperature resistant infrared radiation panel of the present invention.
Fig. 4 is the structural representation of the compound anchor nails of cermet of the present invention.
The specific embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail as the effect of the mutual alignment between the shape of each related member, structure, each several part and annexation, each several part and operation principle etc.
Embodiment 1:
As shown in the figure, the present embodiment shuttle kiln comprises kiln body, the kiln thorax inwall 1 of kiln body is removably provided with some high temperature resistant infrared radiation panels 2, described high temperature resistant infrared radiation panel 2 is provided with infra-red radiation layer 21 towards the one side of kiln thorax inside, and high temperature resistant infrared radiation panel 2 is provided with thermal insulation layer 22 towards the one side of kiln thorax wall; The normal direction of infra-red radiation layer 21 is over against the product that needs sintering 3 in kiln thorax.Wherein, the infra-red radiation layer 21 of high temperature resistant infrared radiation panel 2 is made by corundum-mullite plate or mullite plate, and thickness is about 10mm; The thermal insulation layer 22 of high temperature resistant infrared radiation panel 2 is ceramic fiber blanket, and thickness is about 5～20mm.
Every high temperature resistant infrared radiation panel 2 all utilizes five compound anchor nails 4 of cermet to be fixed on kiln thorax inwall 1, wherein four compound anchor nails 4 of cermet are distributed in four angles of high temperature resistant infrared radiation panel 2, and the compound anchor nails 4 of all the other cermets is positioned at the central authorities of high temperature resistant infrared radiation panel 2.The compound anchor nails 4 of described cermet is three-decker, and outer 41 is earthenware, and internal layer 42 is metal or cermet, and intermediate layer 43 is the fine and close castable that internal layer 42 is wrapped up completely; The skin 41 of the compound anchor nails 4 of described cermet has internal and external threads, and the internal layer 42 of the compound anchor nails 4 of cermet has external screw thread.
On high temperature resistant infrared radiation panel 2, there is fin 5, to absorb the energy in more flue gas, and this energy is reflected back to heating workpiece.Certainly, the cavity that fin 5 also can protrude by hollow replaces, and plays same effect.
Described high temperature resistant infrared radiation panel material is by 90 ~ 95 parts of mullites or corundum-mullite, 5 ~ 10 parts of composite mixed high infrared radiation material phosphor composings; Described composite mixed high infrared radiation material powder is by Fe
2o
355 ~ 75 parts, 15 ~ 30 parts of NiO, 5 ~ 10 parts of ZnO, MnO
20.5 ~ 1.5 part, 0.5 ~ 2 part of CoO, Cr
2o
33 ~ 5 parts, CeO
20.05 ~ 0.2 part, Er
2o
30.05 ~ 0.2 part, Nd
2o
30.05 ~ 0.2 part, Yb
2o
30.05 ~ 0.2 part of composition, adopts blend to grind, fill after saggar high temperature sintering, then forms through broken ball milling.
Claims (7)
1. a shuttle kiln, comprise kiln body, the kiln thorax inwall that it is characterized in that described kiln body is removably provided with some high temperature resistant infrared radiation panels, described high temperature resistant infrared radiation panel is provided with infra-red radiation layer towards the one side of kiln thorax inside, and high temperature resistant infrared radiation panel is provided with thermal insulation layer towards the one side of kiln thorax wall; Described infra-red radiation layer is made by corundum-mullite plate or mullite plate, and described thermal insulation layer is ceramic fiber blanket.
2. shuttle kiln according to claim 1, it is characterized in that described high temperature resistant infrared radiation panel utilizes the compound anchor nails of cermet to be fixed on kiln thorax inwall, the compound anchor nails of described cermet is three-decker, skin is earthenware, internal layer is metal or cermet, the fine and close castable of intermediate layer for internal layer is wrapped up completely.
3. shuttle kiln according to claim 2, is characterized in that the skin of the compound anchor nails of described cermet has internal and external threads, and the internal layer of the compound anchor nails of cermet has external screw thread; Or the skin of the compound anchor nails of described cermet has external screw thread, and the internal layer of the compound anchor nails of cermet has external screw thread.
4. according to the shuttle kiln described in claim 2 or 3, it is characterized in that described every high temperature resistant infrared radiation panel all utilizes five compound anchor nails of cermet to be fixed on kiln thorax inwall, wherein four compound anchor nails of cermet are distributed in four angles of high temperature resistant infrared radiation panel, and all the other compound anchor nails of cermet are positioned at the central authorities of high temperature resistant infrared radiation panel.
5. shuttle kiln according to claim 1, the normal direction that it is characterized in that described infra-red radiation layer is over against the product that needs sintering in kiln thorax.
6. shuttle kiln according to claim 1, is characterized in that having hollow convex to go out cavity and/or fin on described high temperature resistant infrared radiation panel.
7. energy-saving heating furnace according to claim 1, is characterized in that described high temperature resistant infrared radiation panel material is by 90 ~ 95 parts of mullites or corundum-mullite, 5 ~ 10 parts of composite mixed high infrared radiation material phosphor composings; Described composite mixed high infrared radiation material powder is by Fe
2o
355 ~ 75 parts, 15 ~ 30 parts of NiO, 5 ~ 10 parts of ZnO, MnO
20.5 ~ 1.5 part, 0.5 ~ 2 part of CoO, Cr
2o
33 ~ 5 parts, CeO
20.05 ~ 0.2 part, Er
2o
30.05 ~ 0.2 part, Nd
2o
30.05 ~ 0.2 part, Yb
2o
30.05 ~ 0.2 part of composition, adopts blend to grind, fill after saggar high temperature sintering, then forms through broken ball milling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355591.4A CN104089480B (en) | 2014-07-24 | 2014-07-24 | A kind of shuttle kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355591.4A CN104089480B (en) | 2014-07-24 | 2014-07-24 | A kind of shuttle kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104089480A true CN104089480A (en) | 2014-10-08 |
| CN104089480B CN104089480B (en) | 2015-11-11 |
Family
ID=51637218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410355591.4A Expired - Fee Related CN104089480B (en) | 2014-07-24 | 2014-07-24 | A kind of shuttle kiln |
Country Status (1)
| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4630594A (en) * | 1983-03-09 | 1986-12-23 | Ellersick Russell R | Furnace wall lining composition and the use thereof |
| CN2093968U (en) * | 1991-04-25 | 1992-01-22 | 赵同利 | Automatic electronic igniting infrared evaporation oil furnace |
| CN2106466U (en) * | 1991-08-02 | 1992-06-03 | 周汉强 | High-efficient carborundum infrared heater |
| CN102604466A (en) * | 2012-01-12 | 2012-07-25 | 广东新劲刚超硬材料有限公司 | Black-increasing agent for high-temperature infrared-radiation energy-saving coating and preparation method of black-increasing agent |
| CN202928372U (en) * | 2012-11-07 | 2013-05-08 | 六安万达炉业有限公司 | Long-life resistance tape and composite furnace liner of heating furnace |
| CN203501788U (en) * | 2013-09-30 | 2014-03-26 | 武汉钢铁(集团)公司 | Arc-arch-top furnace lining of zirconium fiber structure |
-
2014
- 2014-07-24 CN CN201410355591.4A patent/CN104089480B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4630594A (en) * | 1983-03-09 | 1986-12-23 | Ellersick Russell R | Furnace wall lining composition and the use thereof |
| CN2093968U (en) * | 1991-04-25 | 1992-01-22 | 赵同利 | Automatic electronic igniting infrared evaporation oil furnace |
| CN2106466U (en) * | 1991-08-02 | 1992-06-03 | 周汉强 | High-efficient carborundum infrared heater |
| CN102604466A (en) * | 2012-01-12 | 2012-07-25 | 广东新劲刚超硬材料有限公司 | Black-increasing agent for high-temperature infrared-radiation energy-saving coating and preparation method of black-increasing agent |
| CN202928372U (en) * | 2012-11-07 | 2013-05-08 | 六安万达炉业有限公司 | Long-life resistance tape and composite furnace liner of heating furnace |
| CN203501788U (en) * | 2013-09-30 | 2014-03-26 | 武汉钢铁(集团)公司 | Arc-arch-top furnace lining of zirconium fiber structure |
Non-Patent Citations (1)
| Title |
|---|
| 潘儒宗等: "莫来石质红外辐射材料的研制", 《武汉工业大学学报》, vol. 4, 31 December 1988 (1988-12-31), pages 437 - 441 * |
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| CN104089480B (en) | 2015-11-11 |
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Granted publication date: 20151111 Termination date: 20160724 |