CN104101206A - Box-type muffle furnace - Google Patents
Box-type muffle furnace Download PDFInfo
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- CN104101206A CN104101206A CN201410355818.5A CN201410355818A CN104101206A CN 104101206 A CN104101206 A CN 104101206A CN 201410355818 A CN201410355818 A CN 201410355818A CN 104101206 A CN104101206 A CN 104101206A
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- infrared radiation
- high temperature
- cermet
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- resistant infrared
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Abstract
The invention aims to provide a box-type muffle furnace which is high in energy utilization rate and long in service life and comprises a furnace body. A plurality of high-temperature-resistant infrared radiant plates are detachably mounted on the inner wall of a hearth of the furnace body, an infrared radiant layer is arranged on the surface, which faces the inside of the hearth, of each high-temperature-resistant infrared radiant plate, and a heat-insulation layer is arranged on the surface, which faces the wall of the hearth, of each high-temperature-resistant infrared radiant plate. The box-type muffle furnace has the advantages that the high-temperature-resistant infrared radiant plates with the heat-insulation layers are mounted on the inner wall of the furnace, so that absorbed energy can be uniformly radiated to products required to be sintered; the heat-insulation layers are arranged on the backs of the radiant plates, so that heat can be stopped from being transferred to furnace walls, and the energy can be transferred to the products required to be sintered by means of radiation as much as possible; the service life of the furnace can be prolonged owing to the high-temperature-resistant infrared radian plates, and an economic benefit can be increased; the high-temperature-resistant infrared radiant plates are mounted on the furnace walls, so that heat shock damage due to the fact that dense refractory materials are quickly cooled and heated by flue gas can be relieved, requirements on the quality of the refractory materials can be lowered, and the furnace construction cost can be reduced.
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 are low, the phenomenon that energy waste is larger.Low for Industrial Stoves and the ubiquitous effective utilization rate of energy of Industrial Boiler, 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 brickwork of thermal capacitance, 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 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 need the available heat only 25%～30% of the product of sintering.
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 has solved the product that needs sintering on the basis of high thermal effect absorbs problem, has further improved the thermal efficiency.
In Industrial Stoves burner hearth, conduct heat and have: the convection heat transfer' heat-transfer by convection of product radiation, the radiation of the furnace wall surface of solids and furnace gas radiation and the furnace gas of Fire Radiation, burning.In simple terms, participate in the 3 kinds of basic objects that have of the interior heat exchanging process of stove: 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 at 800 DEG C; Between 800 DEG C～1000 DEG C, be to rely on convection current and radiation, when temperature, the heat conduction between furnace gas and heating object is main during higher than 1000 DEG C relies on far infrared radiation heat exchange simultaneously, and the heat 90% that heating object absorbs realizes by radiation heat transfer.Most of Industrial Stoves burner hearth 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 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 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.
In addition, increase burner hearth area with thrust in addition; For further improving the thermal efficiency, it is energy-conservation that someone proposes black matrix strengthening radiant heat transfer, developed corresponding black body radiation element, and it is distributed in kiln inwall.As explicitly pointing out the material by following weight percentage used, patent " a kind of black matrix material and the energy-conservation Radiation Cup (patent No.: CN 103288464 A) of being made up of black matrix material " forms: 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 under the more than 900 DEG C condition of temperature, launch far-infrared electromagnetic wave in stove, in use can environment not produced and be polluted, 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 to ensure by surface spraying far-infrared paint.In actual application, in the position at black matrix place part, or adopt spraying far ultrared paint to improve thermal effect, exist equally initial stage thermal effect high, in use procedure, have thermal effect decay along with infrared coating comes off, this technology does not fully solve the problems such as energy absorption and infrared radiation coating are aging yet.
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 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 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 low 300～500 DEG C compared with temperature in stove; High temperature resistant infrared radiation panel can increase the service life, and 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, 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 brickwork cost.High temperature resistant infrared radiation panel adopts high temperature sintering preparation, has long service life, can reach 5～10 years, suitable with the projected life of Industrial Stoves and boiler, even higher; Infra-red radiation layer can adopt black matrix material or far-infrared material preparation, also can be 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, ensure for a long time the energy-efficient of box Muffle furnace, synthesis energy saving efficiency reaches 15～30%, compared with the prior art has further and improves.
Further, described high temperature resistant infrared radiation panel utilizes the compound anchor studs of cermet to be fixed on inboard wall of burner hearth, and the compound anchor studs of described cermet is three-decker, and skin is earthenware, internal layer is metal or cermet, and intermediate layer is the fine and close castable that 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 ensure to hang security reliability; And the compound anchor studs of cermet 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 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 studs 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 studs, the skin of the compound anchor studs of described cermet has internal and external threads, and the internal layer of the compound anchor studs of cermet has external screw thread; Or the skin of the compound anchor studs of described cermet has external screw thread, and the internal layer of the compound anchor studs of cermet has external screw thread.
Further, described every high temperature resistant infrared radiation panel all utilizes five compound anchor studs of cermet to be fixed on inboard wall of burner hearth, wherein four compound anchor studs of cermet are distributed in four angles of high temperature resistant infrared radiation panel, and all the other compound anchor studs of cermet are positioned at the central authorities of high temperature resistant infrared radiation panel.Above-mentioned five compound anchor studs of cermet have formed the figure by four triangle splicings, and wherein the compound anchor studs of any two cermets is damaged and also can not 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 that needs sintering in burner hearth, 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 cordierites or mullite or carborundum 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.
Box Muffle furnace 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 stove, there is good promotional value.
Brief description of the drawings
Fig. 1 is the chamber structure schematic diagram of box Muffle furnace 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 studs of cermet of the present invention.
Detailed description of the invention
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail as effect and the operation principle etc. of the mutual alignment between the shape of related each member, structure, each several part and annexation, each several part.
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 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 that needs sintering 3 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; The infra-red radiation layer 21 use black matrix material of high temperature resistant infrared radiation panel 2 or far-infrared material preparation, thickness is about 10mm.
Every high temperature resistant infrared radiation panel 2 all utilizes five compound anchor studs 4 of cermet to be fixed on inboard wall of burner hearth 1, wherein four compound anchor studs 4 of cermet are distributed in four angles of high temperature resistant infrared radiation panel 2, and the compound anchor studs 4 of all the other cermets is positioned at the central authorities of high temperature resistant infrared radiation panel 2.The compound anchor studs 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 studs 4 of described cermet has internal and external threads, and the internal layer 42 of the compound anchor studs 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.
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 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 (8)
1. a box Muffle furnace, comprise body of heater, the inboard wall of burner hearth that it is characterized in that described body of heater 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 burner hearth inside, and high temperature resistant infrared radiation panel is provided with thermal insulation layer towards the one side of hearth wall.
2. box Muffle furnace according to claim 1, it is characterized in that described high temperature resistant infrared radiation panel utilizes the compound anchor studs of cermet to be fixed on inboard wall of burner hearth, the compound anchor studs of described cermet is three-decker, skin is earthenware, internal layer is metal or cermet, and intermediate layer is the fine and close castable that internal layer is wrapped up completely.
3. box Muffle furnace according to claim 2, is characterized in that the skin of the compound anchor studs of described cermet has internal and external threads, and the internal layer of the compound anchor studs of cermet has external screw thread; Or the skin of the compound anchor studs of described cermet has external screw thread, and the internal layer of the compound anchor studs of cermet has external screw thread.
4. according to the box Muffle furnace described in claim 2 or 3, it is characterized in that described every high temperature resistant infrared radiation panel all utilizes five compound anchor studs of cermet to be fixed on inboard wall of burner hearth, wherein four compound anchor studs of cermet are distributed in four angles of high temperature resistant infrared radiation panel, and all the other compound anchor studs of cermet are positioned at the central authorities of high temperature resistant infrared radiation panel.
5. box Muffle furnace according to claim 1, the thermal insulation layer that it is characterized in that described high temperature resistant infrared radiation panel is ceramic fiber blanket.
6. 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 that needs sintering in burner hearth.
7. box Muffle furnace 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.
8. 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 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 |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN104101206A true CN104101206A (en) | 2014-10-15 |
| CN104101206B CN104101206B (en) | 2015-12-09 |
Family
ID=51669569
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410355818.5A Expired - Fee Related CN104101206B (en) | 2014-08-11 | 2014-08-11 | Box Muffle furnace |
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| CN (1) | CN104101206B (en) |
Cited By (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 |
| CN108373335A (en) * | 2018-01-29 | 2018-08-07 | 毕舒 | It is a kind of that there is the heat-preserving complex material and preparation method thereof for increasing the thermal efficiency |
| CN110118486A (en) * | 2019-05-28 | 2019-08-13 | 哈尔滨工业大学（威海） | The thin plate heating multi-functional and infrared composite box-type heating furnace of miniaturization and method |
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| US5017209A (en) * | 1988-05-19 | 1991-05-21 | Sumitomo Electric Industries, Ltd. | High temperature furnace with thermal insulation |
| 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 kiln |
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2014
- 2014-08-11 CN CN201410355818.5A patent/CN104101206B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5017209A (en) * | 1988-05-19 | 1991-05-21 | Sumitomo Electric Industries, Ltd. | High temperature furnace with thermal insulation |
| 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 kiln |
Cited By (5)
| 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 |
| CN108373335A (en) * | 2018-01-29 | 2018-08-07 | 毕舒 | It is a kind of that there is the heat-preserving complex material and preparation method thereof for increasing the thermal efficiency |
| CN110118486A (en) * | 2019-05-28 | 2019-08-13 | 哈尔滨工业大学（威海） | The thin plate heating multi-functional and infrared composite box-type heating furnace of miniaturization and method |
| 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 |
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| CN104101206B (en) | 2015-12-09 |
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