CN104727976A - Combustion heating system for Stirling engine - Google Patents
Combustion heating system for Stirling engine Download PDFInfo
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- CN104727976A CN104727976A CN201510101420.3A CN201510101420A CN104727976A CN 104727976 A CN104727976 A CN 104727976A CN 201510101420 A CN201510101420 A CN 201510101420A CN 104727976 A CN104727976 A CN 104727976A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 50
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 49
- 239000000919 ceramic Substances 0.000 claims abstract description 9
- 239000002737 fuel gas Substances 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 16
- 230000003197 catalytic effect Effects 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 8
- 239000011229 interlayer Substances 0.000 claims description 8
- 238000005485 electric heating Methods 0.000 claims description 7
- 238000009422 external insulation Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000011253 protective coating Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000011214 refractory ceramic Substances 0.000 claims 1
- 239000003870 refractory metal Substances 0.000 claims 1
- 238000012546 transfer Methods 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 238000005338 heat storage Methods 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 abstract 2
- 230000001681 protective effect Effects 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000000567 combustion gas Substances 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005496 tempering Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 4
- 150000003254 radicals Chemical class 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000644 propagated effect Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000007348 radical reaction Methods 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
- F02G1/055—Heaters or coolers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The invention relates to a combustion heating system for a Stirling engine. The combustion heating system for the Stirling engine is composed of a straight-shaped gradient lapped type porous medium combustor and a fill type porous medium combustor, which are arranged up and down, wherein the straight-shaped gradient lapped type porous medium combustor comprises a shell, a fuel gas inlet, a pre-mixing chamber, an axial thermal insulating layer, a flame igniter leading wire protective tube, an igniter, a gradient ceramic porous medium layer and a catalyst layer, wherein the fuel gas inlet, the pre-mixing chamber, the axial thermal insulating layer, the flame igniter leading wire protective tube, the igniter, the gradient ceramic porous medium layer and the catalyst layer are arranged in the shell in sequence form top to bottom, the fill type porous medium combustor comprises an external insulating layer, a metal net cylinder arranged in the insulating layer and heating tubes arranged in the metal net cylinder in a central symmetry mode, and the gaps of the heating tubes are filled with metal wires. The combustion heating system for the Stirling engine has the advantages of being stable in combustion, high in combustion efficiency, good in heat transfer performance, good in heat storage performance, stable in working, wide in load regulation range, easy to regulate and less in pollutant discharge, and the effect on improving the fuel gas type Stirling engine working efficiency is remarkable.
Description
Technical field
The invention belongs to burning and heat-exchanger rig, especially relate to a kind of combustion heating system of Stirling engine.
Background technique
Stirling engine is a kind of closed external-combustion engine, there is fuel source wide, the thermal efficiency is high, exhaust pollution is few, service performance is good, the advantages such as noise is low, and in distributed energy field, clean gas power field, field of solar thermal power generation have important application, more and more receives the concern of people.
External combustion system is the important component part of Stirling engine, its major function organizes burning and heat exchange by rationally, efficiently, the chemical energy of fuel is heat energy and passes to heater by heat exchanger, by heater, heat energy is passed to working medium in machine by heat exchange again, thus make working medium expansion work in motor in machine, thermal power transfer is become mechanical energy.As can be seen here, the height of an engine efficiency, not only depends on the cycle efficiency of motor itself, and also has very large relation with the height of the burning conversion efficiency of its external combustion system.For this reason, design efficient, reliable Stirling engine, the design of external combustion system is most important.
The working medium of the heater body of Stirling is all in pressurized state, and its density is larger; Flow velocity is also higher, so internal heat is sufficient.The density of external-burning product is little, and flow velocity is low, to such an extent as to receives the heat output that the very large temperature difference could transmit necessity, and therefore the heat-transfer effect improved outside heater tube will improve the service behaviour of heater greatly.Meanwhile, namely occur " focus " at a lot of heater section non-uniform phenomenon that often can be heated.In order to prevent heating pipe from being burnt, " focus " temperature must be equal to or less than the Maximum operating temperature (metallurgical limit) that metal can bear.In fact the mean temperature of heater section is than metallurgical limit much lower (can be low to 100 DEG C), and so low mean temperature makes the power efficiency of motor decline simultaneously.
In sum, be improve the service behaviour of Stirling-electric hybrid, its firing chamber and heater be optimized to design be necessary.Therefore, the present invention, by adopting porous burner heat transfer technology, devises a kind of combustion heating system for gas-type Stirling engine.Make full use of the good heat storage capacity of porous medium, fierce disturbance, stronger heat conduction and radiating capacity, make burning room temperature more even, arrive heater surfaces mean temperature high, thus improve the power efficiency of motor.This system can be applicable to gas-type Stirling engine, is especially operated in the main gas-type Stirling engine operated with steady working condition in distributed busbar protection.
Also disclose relevant Stirling device in prior art, such as, China Mining University Zhang Baosheng, Gong little Mao, Zhou Fan etc. have invented a kind of heat-storaging coal-seam gas Stirling device, the patent No.: 201120056598.8.The high-temperature flue gas that this model utility utilizes porous media combustor to produce realizes the high efficiency transmission of heat by the coil pipe be coiled in heat reservoir.Achieve the especially low concentration coal-bed gas generating of irregular coal seam gas, effectively reduce the unstable especially fluctuation of concentration of coal-seam gas source of the gas greatly to the impact of whole device, have simultaneously the thermal efficiency high, pollute little, noise is low, conveniently moving, simple and convenient for maintenance.But its porous media combustor structure is too simple, easily produce combustion instability phenomenon, hot head simplicity of design, also makes temperature conductivity limit to some extent simultaneously.
Cen Kefa, Cheng Leming etc. of Zhejiang University devise a kind of gradual-change porous-medium burner model utility, the patent No.: 01226080.0.There is burner shell and thermal insulation layer thereof, secondary air distribution circle is provided with at burner shell and thermal insulation layer inwall thereof, burner shell and thermal insulation layer one end thereof are provided with cooling ring, premixing chamber, fuel gas inlet and air intlet, be provided with combination gas uniform distributor at radiator center, in secondary air distribution circle, be provided with gradual change voids heterogeneous porous medium.This gradual-change porous-medium burner flameholding, combustion efficiency is high, and NOx emission is low, the advantage that pollutant emission is low, and volume is little, compact structure, load regulation range wide, has obvious business efficiency.But because this invention is mainly used in research experiment, in order to not change burner internal porous medium Rotating fields, therefore select to use electrical spark to ignite at combustor exit, such design is unfavorable for applying on Stirling-electric hybrid, and the firing time of burner is increased greatly.
Summary of the invention
Object of the present invention is exactly provide one can for Stirling engine to overcome defect that above-mentioned prior art exists, the combustion heating system that combustion efficiency is high, good heat-transfer, disposal of pollutants are low.
Object of the present invention can be achieved through the following technical solutions:
A combustion heating system for Stirling engine, is made up of straight shape gradual change stacked porous media combustor setting up and down and filled type porous medium heater,
Described straight shape gradual change stacked porous media combustor comprises housing; and be arranged on set gradually from top to bottom in housing fuel gas inlet, premixing chamber, axial thermal-protective coating, igniter tail cord guide pipe, igniter, gradation type ceramic porous medium layer, catalytic layer
Described filled type porous medium heater, by external insulation layer, is arranged on the wire netting cylinder in thermal insulation layer, and the heating pipe arranged that is centrosymmetric in wire netting cylinder, fills wire in the gap of heating pipe.
Filament shape porous media material is filled in described premixing chamber, can form Turbulence Flow air-flow on the one hand makes combustion gas well mix with pre-hot blast air, on the other hand, prevent due to tempering or the reason such as pre-hot blast temperature is too high, cause premix temperature degree to exceed combustion gas burning-point, cause premixing chamber to explode.Cause when bursting into flames when causing premixing chamber's local space temperature too high due to some factor, the porous media material that its environment temperature is lower can absorb rapidly calory burning, the reaction heat making combustion heat loss be greater than burning to produce; Analyze chain type reaction mechanism known simultaneously, owing to contacting with the porous media material of confusion, the amount of activated group (free radicals) in flame loses activity and destroys, and chain type free radical reaction is stopped, produce gap flame arrest, ensure that premixing chamber can not blast danger.
Described housing is the double layer construction of inner casing and shell composition, and described inner casing is resistant to elevated temperatures corundum material, and described shell comprises internal layer thermal insulating material and layer structure Steel material, leaves air preheat interlayer between inner casing and shell.
Be provided with air intlet below described housing, fresh air is blown into air preheat interlayer from air intlet by external blower, forms pre-hot blast, also can cool inner casing simultaneously, avoid its temperature too high.
The central authorities of described axial thermal-protective coating are mixed gas fumarole, and surrounding is provided with pre-hot-air channel.
Described igniter is conical electric heating type igniter, leaves certain free space near igniter, makes miniature baffle flame-holder, and is placed in burning main region upstream.Relative to electrical spark type igniter, electric heating type igniter fire is reliable.The baffle flame-holder of cone shape, can form recirculating zone at bluff body afterbody, reach the object of the steady flame.Being positioned at burning main region upstream can the porous medium in preheated burning region well, improves speed of ignition.When after flameholding, the free space poor relative to porous medium heat transfer property effectively trap heat and flame is upstream propagated, and protection igniter is not burned and can prevents the generation of tempering.
Described gradation type ceramic porous medium layer be from top to bottom aperture increase gradually multi-layered foamed pottery composition dielectric layer.
Described catalytic layer is porous medium catalytic layer, and on the one hand this position is in downstream, combustion zone, can the NO that produces of catalyticing combustion process
x, CO, HO react and be converted into harmless CO
2, H
2o, N
2; On the other hand, this position is close to combustion zone, and temperature is relatively high, reaction velocity can be made to remain on very high level, make catalytic process more complete.
Described wire netting cylinder center position arranges air-flow cyclone separator, 46 inverted U-shaped heating pipes are arranged at cyclone separator surrounding Central Symmetry, air-flow cyclone separator is used flue gas stream to be divided into the tangential gas flow such as flow such as grade of stereotyped writing different direction, the air-flow of all directions can be made more even, and make air-flow tangential by heat exchanging tube region, increase the time of airflow scouring heat exchanging tube, improve heat transfer efficiency.
Leave certain thickness free space between wire netting cylinder and external insulation layer, make each position air pressure of net cylinder surrounding roughly the same, thus ensure that the air flow method of the abundant heat exchange of all directions in cylinder is even.
Compared with prior art, the present invention has the following advantages:
1. premixed gas is also steady fires the starting time that flame reduces porous media combustor greatly to use electric heating type igniter (shape is conical) to ignite at firing chamber upstream end, the flue gas of simultaneously now discharging also can preheating Stirling-electric hybrid heater, thus the heat waste start up period of as far as possible reducing porous media combustor.And heat and flame are upstream propagated after the porous medium emptying central position intercepts smooth combustion effectively, protect igniter and be not burned and the generation that can prevent tempering.
2. reduce the hot nonuniformity of firing chamber, reduce localized hyperthermia's scope and effectively reduce its temperature, thus reducing the discharge of the dusty gass such as NOx.
3. improve the mean temperature of whole combustion zone, improve combustion position, the catalytic layer further catalysis inflammable gas after-flame of combustion zone end.Make burning more complete, decrease the discharge of the pollutants such as the CO that partial combustion causes; And decrease excess air coefficient thus the discharge of minimizing waste gas heat, improve gear efficiency.
4. by reasonably arranging air flow direction, and the characteristic of porous medium homogeneous temperature, temperature distribution near homogeneous heating pipe, improve the thermal stress situation of heating pipe, reduce heating pipe to the high-temperature behavior requirement of metallic material, more cheap material can be used to make processing, and the manufacture cost reducing Stirling-electric hybrid is conducive to Stirling-electric hybrid commercialization and promotes.
5. utilize radiation that porous medium is good, convection current, heat conduction to increase heater and the heat transfer effect of outside flue gas, optimize heater heat-exchange performance, raising engine chamber and heater specific volume power and efficiency.
6. strengthen the heat storage performance of Stirling engine heater, heter temperature is made more easily to keep stable, optimize the various ride quality of motor (as rotating speed more easily keeps stable, adapt to relatively harsh load variations and combustion gas instability, optimal startup performance etc.) improve the practicability of Stirling-electric hybrid.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation that the present invention is applied on Stirling engine;
Fig. 3 is the structural representation of air-flow cyclone separator.
In figure, 1-fuel gas inlet, 2-igniter tail cord guide pipe, 3-premixing chamber; the pre-hot-air channel of 4-, 5-mixed gas fumarole, 6-igniter; 7-gradation type ceramic porous medium layer, 8-air preheat interlayer, 9-shell, 10-inner casing; 11-air intlet, 12-catalytic layer, 13-wire; 14-heating pipe, 15-air-flow cyclone separator, 16-smoke outlet; the 17-hot head heating mouth of pipe, 18-Stirling engine, 19-combustion heating system.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of combustion heating system 19 of Stirling engine, its structure as shown in Figure 1, is made up of straight shape gradual change stacked porous media combustor setting up and down and filled type porous medium heater.
Straight shape gradual change stacked porous media combustor comprises housing, and be arranged on set gradually from top to bottom in housing fuel gas inlet 1, premixing chamber 3, axial thermal-protective coating, igniter tail cord guide pipe 2, igniter 6, gradation type ceramic porous medium layer 7, catalytic layer 12.Filled type porous medium heater, by external insulation layer, is arranged on the wire netting cylinder in thermal insulation layer, and the heating pipe 14 arranged that is centrosymmetric in wire netting cylinder, fills wire 13 in the gap of heating pipe 14.
Specifically, filament shape porous media material is filled in premixing chamber 3, can form Turbulence Flow air-flow on the one hand makes combustion gas well mix with pre-hot blast air, on the other hand, prevent due to tempering, or pre-hot blast temperature is too high, causes premix temperature degree to exceed combustion gas burning-point, causes premixing chamber to explode.Cause when bursting into flames when causing premixing chamber's local space temperature too high due to some factor, the porous media material that its environment temperature is lower can absorb rapidly calory burning, the reaction heat making combustion heat loss be greater than burning to produce; Analyze chain type reaction mechanism known simultaneously, owing to contacting with the porous media material of confusion, the amount of activated group (free radicals) in flame loses activity and destroys, and chain type free radical reaction is stopped, produce gap flame arrest, ensure that premixing chamber can not blast danger.
Housing is the double layer construction that inner casing 10 and shell 9 form, and inner casing 10 is resistant to elevated temperatures corundum material, and shell 9 comprises internal layer thermal insulating material and layer structure Steel material, leaves air preheat interlayer 8 between inner casing 10 and shell 9.Below housing, be provided with air intlet 11, fresh air is blown into air preheat interlayer 8 from air intlet 11 by external blower, forms pre-hot blast, also can cool inner casing 10 simultaneously, avoid its temperature too high.
The central authorities of axial thermal-protective coating are mixed gas fumarole 5, and surrounding is provided with pre-hot-air channel 4.Igniter 6 is conical electric heating type igniter, near igniter 6, leave certain free space, makes miniature baffle flame-holder, and is placed in burning main region upstream.Relative to electrical spark type igniter, electric heating type igniter fire is reliable.The baffle flame-holder of cone shape, can form recirculating zone at bluff body afterbody, reach the object of the steady flame.Being positioned at burning main region upstream can the porous medium in preheated burning region well, improves speed of ignition.When after flameholding, the free space poor relative to porous medium heat transfer property effectively trap heat and flame is upstream propagated, and protection igniter is not burned and can prevents the generation of tempering.
The dielectric layer of the multi-layered foamed pottery composition that gradation type ceramic porous medium layer 7 increases gradually for aperture from top to bottom.Catalytic layer 12 is porous medium catalytic layer, and on the one hand this position is in downstream, combustion zone, can the NO that produces of catalyticing combustion process
x, CO, HO react and be converted into harmless CO
2, H
2o, N
2; On the other hand, this position is close to combustion zone, and temperature is relatively high, reaction velocity can be made to remain on very high level, make catalytic process more complete.
Arrange air-flow cyclone separator 15 in wire netting cylinder center position, its structure as shown in Figure 3.46 inverted U-shaped heating pipes 14 are arranged at cyclone separator surrounding Central Symmetry, air-flow cyclone separator 15 is used flue gas stream to be divided into the radial air flow such as flow such as grade of stereotyped writing different direction, the air-flow of all directions can be made more even, and make air-flow radial direction by heat exchanging tube region, increase the time of airflow scouring heat exchanging tube, improve heat transfer efficiency.Leave space between wire netting cylinder and external insulation layer, the Heat Conduction in Porous Media material that cyclone separator fin and heating pipe gap-fill wire 13 are made, thus ensure that the air flow method of the abundant heat exchange of all directions in cylinder is even.Be provided with smoke outlet 18 below external insulation layer, the bottom of heating pipe 14 arranges the hot head heating mouth of pipe 17 in order to connect regenerator.
This combustion heating system 19 can be applied on Stirling engine 18, the air preheat interlayer 8 that air is entered between the inner casing 10 of burner and shell 9 by air intlet 11 with high flow velocities through blower carries out preheating, cool inner casing 10 simultaneously, the preheating chamber 3 entering burner top through pre-hot-air channel subsequently mixes with the combustion gas entering premixing chamber through fuel gas inlet 1, enter combustor section by mixed gas uniform distributor again, the igniter 6 through electric heating type add thermal ignition laggard enter gradation type ceramic porous medium layer 7 burn.Enter heater section finally by after catalytic layer 12 perfect combustion, after air-flow cyclone separator 15 adjustment flows to, enter heat transfer zone, discharged by smoke outlet 16 after utilizing the good heat conduction of wire porous medium, convection current, radiation characteristic and heating pipe heat exchange.
After the hot head of Stirling engine 18 and heating pipe absorb the heat of high-temperature flue gas, volume-variation is produced by the relative movement of piston, promote medium and do reciprocation cycle in the cavity closed, at relatively low temperatures and pressures working medium is compressed, working medium expanded by heating under higher temperature and pressure, thus in Stirling cycle, obtain circulation merit, with power transmission system coordinate externally output mechanical energy.
As a kind of new combustion heating system, through theory analysis and practice test, think that native system is practicable, mainly contain the following aspects as Theory and applications foundation:
The combustion heating system of Stirling engine of the present invention, be that its burner and heater have employed with the main distinction of other Stirling-electric hybrid combustion heating systems different from the pastly to be undertaken burning and heating working medium by free space, but by using several simple parts, arrange air flow direction cleverly, make full use of the good heat storage capacity of porous medium, fierce disturbance, stronger heat conduction and radiating capacity; Realize preheating fresh cold air, pre-hot blast fully mixes with the safety of combustion gas, the abundant clean burning of mixed gas, and the improvement of heat exchanger exchange capability of heat, optimizes the performance of Stirling-electric hybrid burner and heater comprehensively.
The advantages such as the combustion heating system described in patent of the present invention has flameholding, combustion efficiency is high, good heat-transfer, heat storage performance are good, working stability, load regulation range extensively easily regulate, disposal of pollutants is few, have obvious use value and using value.
Claims (9)
1. a combustion heating system for Stirling engine, is characterized in that, this heating system is made up of straight shape gradual change stacked porous media combustor setting up and down and filled type porous medium heater,
Described straight shape gradual change stacked porous media combustor comprises housing; and be arranged on set gradually from top to bottom in housing fuel gas inlet, premixing chamber, axial thermal-protective coating, igniter tail cord guide pipe, igniter, gradation type ceramic porous medium layer, catalytic layer
Described filled type porous medium heater by outer and in be followed successively by annular thermal insulation layer, certain thickness free space, wire netting cylinder, in wire netting cylinder, central position is air-flow cyclone separator, the centrosymmetric layout of air-flow cyclone separator surrounding 46 heating pipes, fill wire in the gap of heating pipe.
2. the combustion heating system of a kind of Stirling engine according to claim 1, is characterized in that, fills filament shape porous media material in described premixing chamber.
3. the combustion heating system of a kind of Stirling engine according to claim 1, it is characterized in that, described housing is the double layer construction of inner casing and shell composition, described inner casing is resistant to elevated temperatures corundum material, described shell comprises internal layer thermal insulating material and layer structure Steel material, leaves air preheat interlayer between inner casing and shell.
4. the combustion heating system of a kind of Stirling engine according to claim 3, is characterized in that, is provided with air intlet below described housing, and fresh air is blown into air preheat interlayer from air intlet by external blower.
5. the combustion heating system of a kind of Stirling engine according to claim 1, is characterized in that, the central authorities of described axial thermal-protective coating are mixed gas fumarole, and surrounding is provided with pre-hot-air channel.
6. the combustion heating system of a kind of Stirling engine according to claim 1, it is characterized in that, described igniter is conical electric heating type igniter, leaves certain free space near igniter, make miniature baffle flame-holder, and be placed in burning main region upstream.
7. the combustion heating system of a kind of Stirling engine according to claim 1, is characterized in that, described air-flow cyclone separator, material is refractory ceramics or refractory metal material, structure is eight blade wheel structures, and each root of blade is straight thin slice, and leaf top is quarter circular arc thin slice.
8. the combustion heating system of a kind of Stirling engine according to claim 1, is characterized in that, described wire netting cylinder center position is fixedly installed air-flow cyclone separator, arranges 46 inverted U-shaped heating pipes at cyclone separator surrounding Central Symmetry.
9. the combustion heating system of a kind of Stirling engine according to claim 1, is characterized in that, leaves space between described wire netting cylinder and external insulation layer.
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| CN201510101420.3A CN104727976B (en) | 2015-03-09 | 2015-03-09 | A kind of combustion heating system of Stirling engine |
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| CN201510101420.3A CN104727976B (en) | 2015-03-09 | 2015-03-09 | A kind of combustion heating system of Stirling engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106765082A (en) * | 2016-11-16 | 2017-05-31 | 许华雄 | A kind of water temperature adjustment porous media pulse isovolumic burner |
| CN108199059A (en) * | 2017-12-27 | 2018-06-22 | 中国科学院上海高等研究院 | Compound combustion reactor, fuel cell system and its multiplexing combustion method |
| CN110440617A (en) * | 2018-05-02 | 2019-11-12 | 中国科学院理化技术研究所 | A kind of heat-pipe heat exchanger |
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| CN101158469A (en) * | 2007-11-06 | 2008-04-09 | 东北大学 | Sectional type porous ceramic dielectric gas fuel combusting device |
| CN202055933U (en) * | 2011-04-06 | 2011-11-30 | 中国科学院工程热物理研究所 | Stirling engine heating head for strengthening heat convection by utilizing rotational flow |
| CN103277799A (en) * | 2013-05-21 | 2013-09-04 | 大连亿莱森玛机电有限公司 | External heated combustor system |
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| CN106765082B (en) * | 2016-11-16 | 2019-01-15 | 许华雄 | A kind of water temperature adjustment porous media pulse isovolumic burner |
| CN108199059A (en) * | 2017-12-27 | 2018-06-22 | 中国科学院上海高等研究院 | Compound combustion reactor, fuel cell system and its multiplexing combustion method |
| CN108199059B (en) * | 2017-12-27 | 2020-11-06 | 中国科学院上海高等研究院 | Composite combustion reactor, fuel cell system and multiplexing combustion method thereof |
| CN110440617A (en) * | 2018-05-02 | 2019-11-12 | 中国科学院理化技术研究所 | A kind of heat-pipe heat exchanger |
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