CN104101206B - Box Muffle furnace - Google Patents
Box Muffle furnace Download PDFInfo
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- CN104101206B CN104101206B CN201410355818.5A CN201410355818A CN104101206B CN 104101206 B CN104101206 B CN 104101206B CN 201410355818 A CN201410355818 A CN 201410355818A CN 104101206 B CN104101206 B CN 104101206B
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- high temperature
- infrared radiation
- temperature resistant
- resistant infrared
- radiation panel
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Abstract
The object of the invention is to propose that a kind of energy utilization rate is high, the box Muffle furnace of long service life.Box Muffle furnace of the present invention comprises body of heater, the inboard wall of burner hearth of described body of heater is removably provided with some pieces of 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 burner hearth inside, and high temperature resistant infrared radiation panel is provided with thermal insulation layer towards the one side of hearth wall.At the high temperature resistant infrared radiation panel of kiln inwall mounting strap band thermal insulation layer, the energy even of absorption can be made to be radiated on the product of needs sintering.The radiant panel back side has thermal insulation layer, stops heat to pass to furnace wall, can make the energy product sintered to needs by radiation delivery as much as possible; High temperature resistant infrared radiation panel extends kiln service life, increases economic efficiency.And, furnace wall is installed high temperature resistant infrared radiation panel and can slow down the thermal shock that compact refractory material causes by flue gas rapid heat cycle and damage, the quality requirement of refractory material can be reduced, reduce brickwork cost.
Description
Technical field
The present invention relates to a kind of box Muffle furnace.
Background technology
China's Industrial Stoves and Industrial Boiler are the main bodys of energy resource consumption, and Industrial Stoves and the Industrial Boiler ubiquity thermal efficiency low, the phenomenon that energy waste is larger.For Industrial Stoves and the ubiquitous effective utilization rate of energy of Industrial Boiler low, 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) far infrared energy-saving spray painting technology is adopted; (3) flue gas heat recovery; (4) black body radiation element power-saving technology.
Traditional approach adopts the light material and insulation material brickwork that thermal capacitance is less, to reduce accumulation of heat and radiation loss.This power-economizing method, just heat " is blocked up " in burner hearth, 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 the product of sintering still very low.People by heat Balance Calculation or test, find that resistance furnace body of heater accumulation of heat and radiation loss are up to 60% ~ 70%, and the available heat needing the product of sintering only 25% ~ 30%.
The box Muffle furnace thermal efficiency of heat accumulating type obtains raising by a relatively large margin; The application of infrared radiation coating subsequently, the available heat that the basis of high thermal effect solves the product needing sintering absorbs problem, further increases the thermal efficiency.
Heat transfer has in Industrial Stoves burner hearth: 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, what participate in heat exchanging process in stove has 3 kinds of basic objects: furnace gas, furnace wall, heating and calcining thing.That heat transfer between furnace gas and heating object mainly relies on convection heat transfer' heat-transfer by convection below 800 DEG C; Be rely on convection current and radiation between 800 DEG C ~ 1000 DEG C, when temperature mainly relies on far infrared radiation heat exchange higher than the heat transfer between furnace gas when 1000 DEG C and heating object, the heat 90% that heating object absorbs is realized by radiation heat transfer simultaneously.By refractory brick in major part Industrial Stoves burner hearth, castable refractory, 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 is high can meet kiln needs, but the far infrared transmissivity of these refractory materials generally about 0.35 (as at 1100 DEG C: 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 utilizing 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, and two is heat from inside to outside, thus decreases the heat time, improves 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 passes decline in time.
In addition, burner hearth area is increased with thrust in addition; For improving the thermal efficiency further, it is energy-conservation that someone proposes black matrix strengthening radiant heat transfer, and develop corresponding black body radiation element, it is distributed in kiln inwall.Form as patent " a kind of black matrix material and the energy-conservation Radiation Cup (patent No.: CN103288464A) be made up of black matrix material " explicitly points out the material by following weight percentage used: carborundum 95%, di-iron trioxide 0.5%, manganese dioxide 0.5% and alundum (Al2O3) 4%, there is self coefficient of blackness high, thermal conductivity is good, and far-infrared electromagnetic wave is launched under the condition of in-furnace temperature more than 900 DEG C, in use can not produce environment and pollute, environmental protection, energy-conservation, burner hearth programming rate is fast, and cheap.Point out simultaneously: current in black body radiation element power-saving technology black body radiation element what manufacture material selection is diamond spar mullite, thermal conductivity factor 1.0W/m.K under 1000 DEG C of conditions, its blackness is ensured by surface spraying far-infrared paint.In actual application, in the position part at black matrix place, or adopt spraying far ultrared paint to improve thermal effect, there is initial stage thermal effect equally high, there is thermal effect decay along with infrared coating comes off in use procedure, this technology also fully solves energy absorption and the problem such as infrared radiation coating is aging.
Summary of the invention
The object of the invention is to propose that a kind of energy utilization rate is high, the box Muffle furnace of long service life.
Box Muffle furnace of the present invention comprises body of heater, key is that the inboard wall of burner hearth of described body of heater is removably provided with some pieces of 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 burner hearth inside, and high temperature resistant infrared radiation panel is provided with thermal insulation layer towards the one side of hearth wall.
At the high temperature resistant infrared radiation panel of kiln inwall mounting strap band thermal insulation layer, its method phase total emissivity is 0.85 ~ 0.98, and can adjusting angle as required, energy even is radiated on the product of needs sintering, also can, according to kiln type and the product stacking design infra-red radiation plate structure and the radian that need sintering, the energy even of absorption be radiated on the product of needs sintering simultaneously.High temperature resistant infra-red radiation back has thermal insulation layer, and can make the energy product sintered to needs by radiation delivery as much as possible, its back temperature is low 300 ~ 500 DEG C compared with temperature in stove; High temperature resistant infrared radiation panel can increase the service life, particularly fiber liner, can the chalk retardation time, can solve airflow scouring damaged fiber liner equitemperature simultaneously, significantly extends kiln service life, increases economic efficiency.And, furnace wall is installed high temperature resistant infrared radiation panel and can slow down the thermal shock that compact refractory material causes by flue gas rapid heat cycle and damage, the quality requirement of refractory material can be reduced, reduce brickwork cost.High temperature resistant infrared radiation panel adopts high temperature sintering preparation, has long service life, can reach 5 ~ 10 years, suitable, even higher with the projected life of Industrial Stoves and boiler; Infra-red radiation layer can adopt black matrix material or far-infrared material preparation, also can in surface spraying black matrix material and far ultrared paint preparation, pass through high temperature sintering, Far infrared radiant panel in actual use, far infrared radiation ability is unattenuated, the box Muffle furnace of long-term guarantee energy-efficient, synthesis energy saving efficiency reaches 15 ~ 30%, compared with the prior art has and further improves.
Further, described high temperature resistant infrared radiation panel utilizes cermet compound anchor studs to be fixed on inboard wall of burner hearth, and described cermet compound anchor studs is three-decker, and skin is earthenware, internal layer is metal or cermet, and intermediate layer is the fine and close castable of being wrapped up completely by internal layer.Traditional metal anchorage due to oxidation-resistance property poor, the long-time application under hot environment cannot be met, ceramic anchoring piece then due to the brittleness problems of ceramic material own cannot ensure hang security reliability; And the cermet compound anchor studs in the present invention, its skin is highly heatproof and shockproof dense ceramic tube, 1100 DEG C 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, can be used as structural support layers and use, room temperature compressive resistance is greater than 120MPa simultaneously, rupture strength reaches 20MPa, can prevent refractory metal part or cermet oxidation, above-mentioned cermet compound anchor studs 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 have influence on suspension, improve reliability.
Further, be the connective stability between each layer of reinforcement metal Ceramic Composite anchor studs, the skin of described cermet compound anchor studs has internal and external threads, and the internal layer of cermet compound anchor studs has external screw thread; Or the skin of described cermet compound anchor studs has external screw thread, and the internal layer of cermet compound anchor studs has external screw thread.
Further, the high temperature resistant infrared radiation panel of described every block all utilizes five cermet compound anchor studs to be fixed on inboard wall of burner hearth, wherein four cermet compound anchor studs are distributed in four angles of high temperature resistant infrared radiation panel, and all the other cermet compound anchor studs are positioned at the central authorities of high temperature resistant infrared radiation panel.Above-mentioned five cermet compound anchor studs constitute the figure spliced by four triangles, and wherein any two cermet compound anchor studs are damaged and also can not be affected the equal suspension safety of high temperature resistant infrared radiation panel.
Further, the thermal insulation layer of described high temperature resistant infrared radiation panel is ceramic fiber blanket, to improve heat-insulating capability and service life.
Further, the normal direction of described infra-red radiation layer, just to the product of the needs sintering in burner hearth, absorbed energy even to be radiated on the product of needs sintering as much as possible, improves capacity usage ratio.
Further, 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 heating workpiece.
Further, described high temperature resistant infrared radiation panel material by 90 ~ 95 parts of cordierites or mullite or carborundum or corundum-mullite, 5 ~ 10 parts of composite mixed high infrared radiation material powder compositions; Described composite mixed high infrared radiation material powder is by Fe
2o
355 ~ 75 parts, NiO15 ~ 30 part, ZnO5 ~ 10 part, MnO
20.5 ~ 1.5 part, CoO0.5 ~ 2 part, 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, after adopting blended grinding, dress saggar high temperature sintering, then forms through broken ball milling.
Box Muffle furnace of the present invention is provided with dismountable high temperature resistant infrared radiation panel, installs and convenient disassembly, long service life, fixing reliable, greatly can improve capacity usage ratio and the service life of stove, have good promotional value.
Accompanying drawing explanation
Fig. 1 is the chamber structure schematic diagram of box Muffle furnace of the present invention.
Fig. 2,3 is mounting structure schematic diagrames of high temperature resistant infrared radiation panel of the present invention.
Fig. 4 is the structural representation of cermet compound anchor studs of the present invention.
Detailed description of the invention
Contrast accompanying drawing below, by the description to embodiment, the effect and operation principle etc. of the specific embodiment of the present invention as the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part are described in further detail.
Embodiment 1:
As shown in the figure, the box Muffle furnace of the present embodiment comprises body of heater, the inboard wall of burner hearth 1 of body of heater is removably provided with some pieces of 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 burner hearth inside, and high temperature resistant infrared radiation panel 2 is provided with thermal insulation layer 22 towards the one side of hearth wall; The normal direction of infra-red radiation layer 21 is just to the product 3 of the needs sintering in burner hearth.The thermal insulation layer 22 of high temperature resistant infrared radiation panel 2 is ceramic fiber blanket, and thickness is about 5 ~ 20mm; Infra-red radiation layer 21 black matrix material or the far-infrared material preparation of high temperature resistant infrared radiation panel 2, thickness is about 10mm.
Every block is high temperature resistant, and infrared radiation panel 2 all utilizes five cermet compound anchor studs 4 to be fixed on inboard wall of burner hearth 1, wherein four cermet compound anchor studs 4 are distributed in four angles of high temperature resistant infrared radiation panel 2, and all the other cermet compound anchor studs 4 are positioned at the central authorities of high temperature resistant infrared radiation panel 2.Described cermet compound anchor studs 4 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 of being wrapped up completely by internal layer 42; The skin 41 of described cermet compound anchor studs 4 has internal and external threads, and the internal layer 42 of cermet compound anchor studs 4 has external screw thread.
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 heating workpiece.Certainly, the cavity that fin 5 also can protrude by hollow replaces, and plays same effect.
High temperature resistant infrared radiation panel material by 90 ~ 95 parts of cordierites or mullite or carborundum or corundum-mullite, 5 ~ 10 parts of composite mixed high infrared radiation material powder compositions; Described composite mixed high infrared radiation material powder is by Fe
2o
355 ~ 75 parts, NiO15 ~ 30 part, ZnO5 ~ 10 part, MnO
20.5 ~ 1.5 part, CoO0.5 ~ 2 part, 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, after adopting blended grinding, dress saggar high temperature sintering, then forms through broken ball milling.
Claims (7)
1. a box Muffle furnace, comprise body of heater, it is characterized in that the inboard wall of burner hearth of described body of heater is removably provided with some pieces of 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 burner hearth inside, and high temperature resistant infrared radiation panel is provided with thermal insulation layer towards the one side of hearth wall; Described high temperature resistant infrared radiation panel utilizes cermet compound anchor studs to be fixed on inboard wall of burner hearth, described cermet compound anchor studs is three-decker, skin is earthenware, and internal layer is metal or cermet, and intermediate layer is the fine and close castable of being wrapped up completely by internal layer.
2. box Muffle furnace according to claim 1, it is characterized in that the skin of described cermet compound anchor studs has internal and external threads, the internal layer of cermet compound anchor studs has external screw thread; Or the skin of described cermet compound anchor studs has external screw thread, and the internal layer of cermet compound anchor studs has external screw thread.
3. box Muffle furnace according to claim 1 and 2, it is characterized in that the high temperature resistant infrared radiation panel of described every block all utilizes five cermet compound anchor studs to be fixed on inboard wall of burner hearth, wherein four cermet compound anchor studs are distributed in four angles of high temperature resistant infrared radiation panel, and all the other cermet compound anchor studs are positioned at the central authorities of high temperature resistant infrared radiation panel.
4. box Muffle furnace according to claim 1, is characterized in that the thermal insulation layer of described high temperature resistant infrared radiation panel is ceramic fiber blanket.
5. box Muffle furnace according to claim 1, is characterized in that the normal direction of described infra-red radiation layer is just to the product of the needs sintering in burner hearth.
6. box Muffle furnace according to claim 1, is characterized in that described high temperature resistant infrared radiation panel has hollow convex to go out cavity and/or fin.
7. box Muffle furnace according to claim 1, is characterized in that described high temperature resistant infrared radiation panel material is by 90 ~ 95 parts of cordierites or mullite or carborundum or corundum-mullite, 5 ~ 10 parts of composite mixed high infrared radiation material powder compositions; Described composite mixed high infrared radiation material powder is by Fe
2o
355 ~ 75 parts, NiO15 ~ 30 part, ZnO5 ~ 10 part, MnO
20.5 ~ 1.5 part, CoO0.5 ~ 2 part, 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, after adopting blended grinding, dress saggar high temperature sintering, then forms through broken ball milling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355818.5A CN104101206B (en) | 2014-08-11 | 2014-08-11 | Box Muffle furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355818.5A CN104101206B (en) | 2014-08-11 | 2014-08-11 | Box Muffle furnace |
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| CN104101206A CN104101206A (en) | 2014-10-15 |
| CN104101206B true CN104101206B (en) | 2015-12-09 |
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ID=51669569
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| CN201410355818.5A Expired - Fee Related CN104101206B (en) | 2014-08-11 | 2014-08-11 | Box Muffle furnace |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918222A (en) * | 2015-12-25 | 2017-07-04 | 天津市维之丰科技有限公司 | A kind of Muffle furnace |
| CN106918223A (en) * | 2015-12-25 | 2017-07-04 | 天津市维之丰科技有限公司 | A kind of electric furnace with spectral detection function |
| CN108373335B (en) * | 2018-01-29 | 2020-11-13 | 毕舒 | Heat-insulating composite material with increased thermal efficiency and preparation method thereof |
| CN110118486B (en) * | 2019-05-28 | 2024-04-02 | 山东威奥智能装备有限公司 | Multifunctional and miniaturized infrared composite box-type heating furnace regulation and control method for heating thin plate |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2553633B2 (en) * | 1988-05-19 | 1996-11-13 | 住友電気工業株式会社 | Insulation method for high temperature furnace |
| CN2201644Y (en) * | 1994-07-30 | 1995-06-21 | 北京雷迪艾森新技术开发公司 | Photoelectric tube heating furnace |
| CN2299292Y (en) * | 1997-03-19 | 1998-12-02 | 葛世名 | Maintenance-free high infrared furnace wall reflecting appts. |
| CN201837236U (en) * | 2010-06-21 | 2011-05-18 | 徐其明 | Infrared heating furnace for aluminum profile die |
| CN202182628U (en) * | 2011-06-24 | 2012-04-04 | 北京中太投资管理有限公司 | Energy-saving furnace |
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