CN204153777U - A kind of multi-channel miniature burner of built-in parallel baffle - Google Patents
A kind of multi-channel miniature burner of built-in parallel baffle Download PDFInfo
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- CN204153777U CN204153777U CN201420547997.8U CN201420547997U CN204153777U CN 204153777 U CN204153777 U CN 204153777U CN 201420547997 U CN201420547997 U CN 201420547997U CN 204153777 U CN204153777 U CN 204153777U
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Abstract
The utility model discloses a kind of multi-channel miniature burner of built-in parallel baffle.The multi-channel miniature burner of this built-in parallel baffle, comprise the burner outer wall in rectangle frame cross section, burner outer wall is made up of upper wall, lower wall and two sidewalls, upper wall, lower wall and two sidewalls form a rectangular channel, the two ends of rectangular channel are respectively air inlet and gas outlet, lower wall is provided with some parallel dividing plates along air inlet and the direction of gas outlet, it is combustion zone that lower wall retains one piece of flat site near air inlet end, between dividing plate and dividing plate, between dividing plate and sidewall, form heat transfer path.During work, fuel and oxidant are after abundant premix, burner internal is passed into by air inlet end, smooth combustion is realized in the combustion zone that dividing plate is not set, the combustion product generated then is assigned in each heat transfer path, gas outlet finally by the burner other end is discharged, and the utility model structure is relatively simple, can realize efficient stable burning.
Description
Technical field
The utility model relates to the microburner for minitype heat optoelectronic system in small power Mechatronic Systems and Engineering Thermophysics field, especially relates to a kind of multi-channel miniature burner of built-in parallel baffle.
Background technology
Along with Micro Electro Mechanical System (Micro Electro-Mechanical System, be called for short MEMS) the continuous progress of R & D Level and the lasting expansion of application, how its power supplying part is divided and carry out reasonable development, be also caused gradually and pay attention to widely.In recent years, some micro-power plants based on burning, due to longevity of service, energy density advantages of higher, are expected to address this problem well, thus become one of focus of various countries' scientific research competition.
Minitype heat optoelectronic system (Micro-thermophotovoltaic, be called for short MTPV System) be the typical small power feedway of one wherein, its structure is relatively simple, do not have moving component, to manufacture assembling also easy, therefore Dominant Facies is also comparatively obvious to other devices.This device is formed primarily of microburner and the large parts of photocell two, and during work, hydrocarbon fuel discharges chemical energy by combustion process in microburner, heats the wall of burner simultaneously; The burner outer wall of the condition of high temperature act as radiation wall, and the part shortwave radiation that it discharges produces electric energy after clashing into low bandgap photocell surface the most at last.At present, the energy conversion efficiency of this minitype heat optoelectronic system is high not enough, one section of gap is still had from practical application, except photoelectric conversion technique needs to be improved further, this to a great extent or to restrict by a series of features such as short, the large surface to volume ratio of fuel residence time in micro-scale gas flow process cause that the excessive and fuel of heat loss selects face narrow.Therefore, as one of of paramount importance parts of minitype heat optoelectronic system, the quality of microburner design not only can impact the stability of internal combustion process, and the temperature distribution state of its outside wall surface also directly can have influence on the output performance of system.
Minitype heat optoelectronic system burner adopts column type and plate two kinds of overall structures usually, the pattern of pipe passageway or rectangular channel is designed to by burner internal, wherein plate burner is owing to easily realizing the modularization closed assembly of multiple sub-device, thus is also more and more subject to the favor of developer.Such as number of patent application is that 200910031281.6(name is called " a kind of micro parallel plate burner with preheating channel "), 201110132029.1(name is called " a kind of flat micro combustor of two spouts based on hydrocarbon fuel ") and 201310014796.1(name be called " a kind of porous media backheating type micro-scale burner ") disclosed burner all have employed slab construction.Although the technical scheme in these patents, can play the efficiency of combustion improving mist, the effect extending air-flow residence time, thus can play certain invigoration effect to micro-scale gas flow process.
But, in device, the basic goal of combustion process is to ensure that radiation wall can reach a good duty, therefore this double-deck identity taking into account burning and radiation, make these parts on stream, not only to consider how realizing of efficient stable combustion process, and for the heat transfer process how strengthened between high-temperature gas and wall, how to ensure that more fuel chemical energy is absorbed by radiation wall, also should cause enough attention.
Summary of the invention
The purpose of this utility model is the deficiency existed for prior art, provides the multi-channel miniature burner that a kind of structure is relatively simple, can realize the built-in parallel baffle of efficient stable burning.
For achieving the above object, the technical scheme that the multi-channel miniature burner of the built-in parallel baffle of the utility model adopts is:
A kind of multi-channel miniature burner of built-in parallel baffle, comprise the burner outer wall in rectangle frame cross section, burner outer wall is made up of upper wall, lower wall and two sidewalls, upper wall, lower wall and two sidewalls form a rectangular channel, the two ends of rectangular channel are respectively air inlet and gas outlet, lower wall is provided with some parallel dividing plates along air inlet and the direction of gas outlet, it is combustion zone that lower wall retains one piece of flat site near air inlet end, between dividing plate and dividing plate, between dividing plate and sidewall, form heat transfer path.During work, fuel and oxidant, after abundant premix, pass into burner internal by air inlet end, in the combustion zone not arranging dividing plate, realize smooth combustion, the combustion product generated then is assigned in each heat transfer path, and the gas outlet finally by the burner other end is discharged.
Between dividing plate and dividing plate, the distance between dividing plate with sidewall is equal.
Burner outer wall and dividing plate are 316 stainless steel materials.
The utility model compared with prior art, has the following advantages:
Straight channel burner with non-inductive windings is compared, each minitype channel that dividing plate is formed has less equivalent diameter, in addition flow area diminishes the suitable increase of mean flow rate in the passage that causes, all can play the effect improving convection transfer rate in passage, thus the heat of the more high-temperature tail gas burned device inwall of energy and baffle plate absorbed; The front end of each dividing plate, in fact also acts as the role of " bluff body ", after gaseous mixture meets them, flow trace will inevitably be affected, major part gas will enter each passage through mixing with after distributing, and portion gas even will be kept off go back to combustion zone, this will add the residence time of mist in burner undoubtedly, thus the completeness of micro-scale gas flow process and the operating efficiency of burner can be made to obtain raising to a certain extent.Under the comprehensive function of these two aspects, more fuel chemical energy is released out on the one hand, and wall have also been obtained raising to the ability that it absorbs on the other hand, this will bring burner outer wall surface radiation energy " matter " and " amount " leap, thus produces active influence effect to the output of the follow-up electric energy of minitype heat optoelectronic system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the multi-channel miniature burner of built-in parallel baffle.
Wherein, 1. burner outer wall, 2. dividing plate, 3. heat transfer path, 4. combustion zone, 5. air inlet, 6. gas outlet.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the utility model further, these embodiments should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
The multi-channel miniature burner of built-in parallel baffle as shown in Figure 1, include burner outer wall 1, dividing plate 2, heat transfer path 3, combustion zone 4, air inlet 5, gas outlet 6, burner outer wall is by upper wall 11, lower wall 12 and two side 13 wall compositions, upper wall, lower wall and two sidewalls form a rectangular channel, the two ends of rectangular channel are respectively air inlet 5 and gas outlet 6, lower wall is provided with along air inlet and the direction of gas outlet four parallel dividing plates 2, it is combustion zone 4 that lower wall retains one piece of flat site near air inlet end, between dividing plate and dividing plate, heat transfer path 3 is formed between dividing plate and sidewall, between dividing plate and dividing plate, distance between dividing plate with sidewall is equal, burner outer wall and dividing plate are 316 stainless steel materials.
Burner is primarily of burner outer wall, parallel dividing plate composition, and it is outside in rectangular structure, inner then overall be the straight channel of square-section; Burner front end is single pass combustion zone, and rear end then forms multiple tail gas heat transfer path by parallel dividing plate.This multichannel design, not only increase the residence time of gaseous mixture in burner, the more important thing is and significantly can improve tail gas with the coefficient of heat transfer between wall, make more burning produce energy absorb by wall, thus bring the lifting of wall surface temperature and available radiant energy, finally active influence is produced to the output of minitype heat optoelectronic system electric energy.
In the utility model, the multi-channel miniature burner of built-in parallel baffle is rectangular structure.Add man-hour, first produce a rectangular metal block by the method for Linear cut, its apparent size is respectively: length 18mm(x direction), width 9mm(y direction), highly for 3mm(z direction).Then, process five length by the method for Linear cut and be 18mm, width 1.2mm at rectangular block internal symmetry, be highly the microchannel of 2mm, to form the blank of burner outer wall 1, dividing plate 2 and heat transfer path 3, the thickness of outer wall and dividing plate is 0.5mm.Subsequently, adopt the method for spark machined by the partial-length dividing plate mill off near burner air inlet end, with the four pieces of dividing plates 2 and five heat transfer paths 3 that form single channel combustion zone 2 that length is 4mm, length is 14mm, and air inlet 5 and multiple gas outlet 6, thus finally produce the multi-channel miniature burner of built-in parallel baffle.
Described burner adopts 316 stainless steels to make, and this kind of material is easy to carry out machining, and can bear the high temperature of more than 2000 DEG C.At high operating temperatures, slin emissivity can reach about 0.7.
Because combustion zone design is near the front end of burner air inlet, therefore can select catch fire rapidly, burn rate faster hydrogen as fuel.During work, from gas cylinder hydrogen out and oxygen (or air) after pressure-reducing valve decompression, fully form premixed gas after mixing in a mixer, and import in microburner through copper nozzle and Custom connector.Gaseous mixture enters burner and after reaching ignition condition from air inlet 5, realize smooth combustion in combustion zone 4 after, the high-temp waste gas become is assigned to each heat transfer path 5 formed by dividing plate 2 and burner outer wall 1, in flow process, continuous release heat, finally discharges burner from each gas outlet 6.
The analysis result of Binding experiment and numerical simulation, at the same conditions, the flat burner of channel type is led directly to relative to the non-inductive windings of same outward appearance and inside dimension, microburner described in the utility model can improve 150 ~ 200K in outside wall surface mean temperature, burner outer wall surface radiation ability can be made significantly to strengthen, thus the power output of Micro-TPV systems converting system and the lifting generation of whole efficiency are comparatively significantly acted on.The design of this burner structure is comparatively simple, and processing and fabricating is convenient, has good practical value.These have all fully shown the advantage place of the multi-channel miniature burner of built-in parallel baffle.
Claims (3)
1. the multi-channel miniature burner of a built-in parallel baffle, it is characterized in that: the burner outer wall comprising rectangle frame cross section, burner outer wall is made up of upper wall, lower wall and two sidewalls, upper wall, lower wall and two sidewalls form a rectangular channel, the two ends of rectangular channel are respectively air inlet and gas outlet, lower wall is provided with some parallel dividing plates along air inlet and the direction of gas outlet, it is combustion zone that lower wall retains one piece of flat site near air inlet end, between dividing plate and dividing plate, between dividing plate and sidewall, form heat transfer path.
2. the multi-channel miniature burner of built-in parallel baffle according to claim 1, is characterized in that: between dividing plate and dividing plate, and the distance between dividing plate with sidewall is equal.
3. the multi-channel miniature burner of built-in parallel baffle according to claim 1, is characterized in that: burner outer wall and dividing plate are 316 stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420547997.8U CN204153777U (en) | 2014-09-23 | 2014-09-23 | A kind of multi-channel miniature burner of built-in parallel baffle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420547997.8U CN204153777U (en) | 2014-09-23 | 2014-09-23 | A kind of multi-channel miniature burner of built-in parallel baffle |
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| CN204153777U true CN204153777U (en) | 2015-02-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296139A (en) * | 2014-09-23 | 2015-01-21 | 江苏嘉和热系统股份有限公司 | Multi-channel mini-type burner internally provided with parallel partition plates |
| CN105864766A (en) * | 2016-04-26 | 2016-08-17 | 华中科技大学 | Multi-channel combustor |
| CN107726302A (en) * | 2017-09-25 | 2018-02-23 | 华中科技大学 | The micro-burner of flame holding is strengthened in a kind of gas preheating |
| CN108278600A (en) * | 2018-02-08 | 2018-07-13 | 江苏大学 | A kind of combined type minute yardstick backheating type burner |
| CN110553259A (en) * | 2019-08-22 | 2019-12-10 | 华中科技大学 | Microminiature non-premix combustor suitable for thermal power generation |
-
2014
- 2014-09-23 CN CN201420547997.8U patent/CN204153777U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296139A (en) * | 2014-09-23 | 2015-01-21 | 江苏嘉和热系统股份有限公司 | Multi-channel mini-type burner internally provided with parallel partition plates |
| CN105864766A (en) * | 2016-04-26 | 2016-08-17 | 华中科技大学 | Multi-channel combustor |
| CN107726302A (en) * | 2017-09-25 | 2018-02-23 | 华中科技大学 | The micro-burner of flame holding is strengthened in a kind of gas preheating |
| CN108278600A (en) * | 2018-02-08 | 2018-07-13 | 江苏大学 | A kind of combined type minute yardstick backheating type burner |
| CN108278600B (en) * | 2018-02-08 | 2024-02-09 | 江苏大学 | Combined microscale regenerative burner |
| CN110553259A (en) * | 2019-08-22 | 2019-12-10 | 华中科技大学 | Microminiature non-premix combustor suitable for thermal power generation |
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