CN203907607U - Rotational flow microburner preheated via waste gas - Google Patents
Rotational flow microburner preheated via waste gas Download PDFInfo
- Publication number
- CN203907607U CN203907607U CN201320445030.4U CN201320445030U CN203907607U CN 203907607 U CN203907607 U CN 203907607U CN 201320445030 U CN201320445030 U CN 201320445030U CN 203907607 U CN203907607 U CN 203907607U
- Authority
- CN
- China
- Prior art keywords
- combustion chamber
- chamber
- air
- pipe
- exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model relates to a rotational flow microburner preheated via waste gas. The rotational flow microburner comprises a combustion chamber, an air charging chamber, an air discharging pipe, an air charging pipe and an air discharging pipe, wherein the combustion chamber, the air charging chamber and the air discharging chamber are all elliptic cylinder bodies; the air charging pipe and the air discharging pipe are cylinders; the combustion chamber is placed in the air charging chamber; the top of the combustion chamber is connected with the internal surface of the top of the air charging chamber; the combustion chamber is equipped with three combustion chamber inlets respectively on side surfaces of the combustion chamber; a one third arc is arranged in each combustion chamber at intervals; an included angle of 30-degree is formed between an axis of each combustion chamber inlet and a round tangent line of the combustion chamber; an air discharging port of the combustion chamber is arranged in the center of a circular cross section of the top of the combustion chamber; the air discharging port is round; a circle center of the air discharging port is placed on the axis of the combustion chamber; the air charging pipe is placed in the center of the lower surface of the air charging chamber; a cross section area of the air charging pipe is the same as an air discharging port of the combustion chamber; the air charging chamber is disposed in the air discharging chamber and connected therewith via a fixed stand column; the air discharging pipe is placed in the center of the lower surface of the air discharging chamber; a cross section area of the air discharging pipe is larger than the air inlet pipe; and external layers of the air discharging chamber and the air discharging pipe are covered with heat insulation material.
Description
Technical field
The utility model belongs to power MEMS technical field, is specifically related to Microthermo photoelectric device, is the innovative design of chamber structure being carried out based on minute yardstick pre-mixing combustion technology and trapped vortex combustion technology.Change flat combustion chamber into flat cylindrical combustion chamber, redesign overall structure, arrange and import and export, utilize the waste gas after burning to carry out preheating to combustion gas, the combustion gas of preheating forms whirlpool after entering combustion chamber, thereby realizes trapped vortex combustion, improves the overall performance of micro thermo optoelectronic system.
Background technology
Power MEMS is directly in micro-system, by burning, the chemical energy of hydrogen or hydrocarbon fuel to be converted to heat energy, then rely on multiple kinds of energy conversion regime power is provided or produces electric energy, there is energy density high, long working life, easy care, the advantage such as pollution-free.Because the energy density (120MJ/Kg) of hydrocarbon fuel is approximately 100 times of lithium battery (1.2MJ/Kg), thus people proposed take burning be basic micropower system, directly in micro-system, by burning, the chemical energy of hydrogen or hydrocarbon fuel is converted to heat energy, then relies on various power conversion modes that power is provided or produce electric energy.As: micro-gas turbine, Miniature reciprocating electrical power generator and Micro-rotary engine etc.But the micro-power plant of these non-direct energy conrersions is all by the scaled gained of machinery powered by conventional energy substantially, existence and mechanically operated reason due to high-speed moving part, at microscopic fields, the fault that these devices occur than conventional equipment at aspects such as heat loss, sealing, processing and manufacturing and assemblings is many.
For fear of above-mentioned fault, the micro-combustion dynamical system of employing based on low-grade fever photoelectric technology, it is micro thermo optoelectronic system, fuel and oxidant, after micro-mixer mixes, are entered in micro parallel plate combustion chamber and burnt, when wall is heated to certain high temperature, will emit photon, when photon strikes photocell, can inspire free electron, thereby produce electric energy.With respect to aforesaid several micro-power plants, be characterized in movement-less part, manufacture and assembling are easier to, and also have higher energy conversion rate simultaneously.Therefore compared obvious superiority with other oligodynamic devices, had a extensive future.Wherein, burner is one of of paramount importance part in micro thermo optoelectronic system, determines the distribution situation of internally fired stability and outside wall surface temperature.Therefore the design of burner is most important, and the ideal of burner structure whether, and the air-flow affecting to a great extent in combustion chamber distributes, and then affects combustion characteristics and emission performance.In addition, the selection of fuel also has very large impact to micro thermo optoelectronic system.
Traditional minute yardstick parallel-plate combustion chamber is in order to obtain higher radiance, directly by resistant to elevated temperatures radiative material (carborundum), made, specific practice is: with two identical shaped carborundum flat boards, be made into dull and stereotyped combustion chamber, vertical junction seals with adiabatic gum, and at this moment combustion chamber is just directly used as radiator.Such chamber structure is cuboid, adopts a side air inlet, a side exhaust, and the air-flow of fuel-oxidant mixtures can not carry out good tissue, the poor stability of burning, efficiency of combustion is restricted.And micro thermo optoelectronic system requires the performance of the very high guarantee entire system of radiating surface temperature, so burning of gas is most important in strengthening micro-burner.
Utility model content
In order to improve the overall performance of micro thermo optoelectronic system, flat combustion chamber is changed into oblate cylinder combustion chamber, at column side face, offer three fuel-oxidant mixtures entrances, outlet is located at cylinder upper surface, then in combustion chamber, 1 outside arranges inlet plenum 2 and the exhaust chamber 3 that steel plate is made, between inlet plenum 2 and exhaust chamber 3 and between inlet plenum 2 and combustion chamber 1, maintain a certain distance, on exhaust chamber 3 outer walls, also to load onto heat-barrier material (shell and the heat-barrier material of exhaust chamber 3 are equivalent to one deck heat shield like this), space between heat shield and inner layer steel plate is as exhaust passageway, space between inlet plenum 2 and outer wall of combustion chamber face is as air inlet passageway, so just, can carry out preheating to air inlet, the gaseous mixture being preheated is injected by three entrances, in combustion chamber, form swirling flow, with this, stabilize the flame and overheavy firing, thereby obtain higher radiant energy.
The utility model design is as follows:
A kind of eddy flow micro-burner that utilizes heating by the exhaust gases, it is characterized in that: comprise combustion chamber 1, inlet plenum 2, exhaust chamber 3, air inlet pipe 4, blast pipe 5, inlet plenum 2, exhaust chamber 3 is oblate cylinder, air inlet pipe 4, blast pipe 5 is cylinder, the inside of inlet plenum 2 is located in combustion chamber 1, its top is connected with the top inner surface of inlet plenum 2, combustion chamber 1 is provided with three entry of combustion chamber 6, be located at respectively 1 side, combustion chamber, / 3rd circular arcs of being separated by between each entry of combustion chamber 6, at flat cylindrical combustion chamber 1 periphery, be 120 degree symmetrical, the round edge tangent line angle of the axis of entry of combustion chamber 6 and combustion chamber 1 is 30 degree, exhaust outlet of combustion chamber 7 is located at the center of 1 circular section, top, combustion chamber, is shaped as circle, and its center of circle is positioned on 1 axis of combustion chamber, inlet plenum 2 lower surface centers are provided with air inlet pipe 4, and sectional area is identical with exhaust outlet of combustion chamber 7, inlet plenum 2 is located in exhaust chamber 3, by anchor post 8, be connected, exhaust chamber 3 lower surface centers are provided with blast pipe 5, sectional area is greater than air inlet pipe 4, the skin of exhaust chamber 3 and blast pipe 5 is provided with one deck heat-barrier material, and the center of circle of combustion chamber 1, inlet plenum 2, exhaust chamber 3, air inlet pipe 4, blast pipe 5 on an axis.
Described combustion chamber 1 Wall Radiation material can be selected resistant to elevated temperatures radiative material carborundum, by bagasse powder, graphite, silica flour and alundum (Al2O3), according to mass ratio, be specifically to make after 5:1:4:1 mixes, combustion chamber wall surface radiative material can jointly form combustion chamber wall surface with photovoltaic cell module and close layer 9, and photovoltaic cell module is in Wall Radiation outer material side; Described exhaust chamber 3 and the outer field heat-barrier material of blast pipe 5 can be made by aluminium foil, specifically by aluminium foil veneer, polyethylene film, fibrous braid, metal deposit, by PUR lamination, are formed; Described inlet plenum 2 and exhaust chamber 3 all can be made by steel plate.
Combustion gas, from air inlet pipe 4 inlet plenum 2 of flowing through, enters in the process of combustion chamber, the high-temp waste gas preheating of can be flowed through exhaust chamber 3 and blast pipe 5, thus improve efficiency of combustion; Combustion gas is easy to form whirlpool after entering cylindrical combustion chamber 1, thereby realizes stable note whirlpool burning, again improves efficiency of combustion, and then improves the overall performance of micro thermo optoelectronic system.
(1) structural design of combustion chamber 1 and selection of dimension: the combustion chamber 1 in the utility model is improved on flat burner basis, shape adopts oblate cylinder, suitably increase the height of cylinder, the object of design is in order better to coordinate air inlet, to form eddy flow so simultaneously.
(2) design of entry of combustion chamber 6, exhaust outlet of combustion chamber 7, air inlet pipe 4, blast pipe 5: entry of combustion chamber 6 is located at flat cylindrical side, have three entry of combustion chamber 6, / 3rd circular arcs of being separated by between each entry of combustion chamber 6, at cylindrical periphery, be 120 degree symmetrical, the axis of entry of combustion chamber 6 and cylindrical round edge tangent line angle are 30 degree; Exhaust outlet of combustion chamber 7 is arranged in the center of oblate cylinder upside circular section, adopts circular row gas port, and its center of circle is positioned on cylinder axis; The mouth of pipe of blast pipe 5 is arranged in the lower surface center of exhaust chamber 3, and area is a bit larger tham the sectional area of exhaust outlet of combustion chamber 7; The entrance of air inlet pipe 4 is arranged in the lower surface center of inner layer steel plate, and sectional area equals the sectional area of exhaust outlet 7, and concrete structure is shown in three-dimensional structure schematic diagram.
(3) selection of the Wall Radiation material of combustion chamber 1: Wall Radiation material selection carborundum is specifically to make after 5:1:4:1 mixes by bagasse powder, graphite, silica flour and alundum (Al2O3) according to mass ratio.
(4) selection of exhaust chamber 3 and blast pipe 5 outer field heat-barrier materials: heat-barrier material is selected aluminium foil, is specifically formed by PUR lamination by aluminium foil veneer, polyethylene film, fibrous braid, metal deposit.Its solar radiation absorbility factor is extremely low, only has 0.07, can reflect away more than 93% radiant heat.In addition, on the one section of blast pipe 5 being connected with exhaust chamber 3, also wrap aluminium foil, can further reduce like this waste gas heat loss, can prevent that again personnel from scalding.
The utility model is compared with existing burner, has as follows advantage significantly:
1. change flat micro combustor into oblate cylinder, the structure of combustion chamber is more compact like this, has shortened to a certain extent flame transmission distance.
2. the outermost heat shield of burner, can reduce the radiation heat loss of waste gas when flowing through exhaust chamber and blast pipe to a great extent; Waste gas streams can carry out preheating to combustion gas again when exhaust chamber and blast pipe, thereby improves intake air temperature, overheavy firing.
3., after the gaseous mixture of fuel oxidizer is injected by three entry of combustion chamber, can in this combustion chamber of oblate cylinder, form whirlpool.This vortex can produce strong centrifugal acceleration; accelerate turbulent flame spread speed; stabilize the flame; and upwards strengthen oil gas blending in week; to be controlled at combustion chamber skin compared with fuel rich area, accelerate the speed of flame outer inside Es-region propagations from combustion chamber, prolonging combustion chamber Flame residence time; thereby realize stratified combustion, improve efficiency of combustion; In addition, because eddy flow exists circumferential flow blending fast, will contribute to improve combustor exit Temperature Distribution level.
4. in the center of upside circular section, flat cylindrical combustion chamber, arrange circular chamber's exhaust outlet, the flame characteristic that ecto-entad is propagated diametrically that can adapt to trapped vortex combustion, can extend like this residence time of flame in combustion chamber, and waste gas is discharged smoothly.Exhaust outlet of combustion chamber adopts and is positioned at the concentric circles on cylindrical axis, can make the more even of combustion gas distribution, and combustion characteristics is better.
Why the utility model can have above-mentioned technique effect main cause to be summarized as follows:
Micro thermo optoelectronic system requires combustion chamber can have high as far as possible radiation efficiency.Two ends, cross section directly be take as porting in existing dull and stereotyped combustion chamber, and this is just restricted the air current composition of combustion chamber, and flame characteristics during burning is undesirable.The utility model passes through the improvement in dull and stereotyped chamber structure and size, can utilize waste gas to carry out preheating to fuel-oxidant mixtures, improve intake air temperature, combustion gas forms again swirling flow after entering toroidal combustion chamber, realize stable trapped vortex combustion, thereby aspect two, improve efficiency of combustion, improve combustion characteristics, finally improve the radiation efficiency of combustion chamber.
accompanying drawing explanation
Fig. 1 and Fig. 2 are three-dimensional appearance structural representations of the present utility model.
Fig. 3, Fig. 4 and Fig. 5 are three-dimensional internal structural representations of the present utility model, wherein, and 1-combustion chamber; 2-inlet plenum; 3-exhaust chamber; 4-air inlet pipe; 5-blast pipe; 6-entry of combustion chamber; 7-exhaust outlet of combustion chamber; 8-anchor post; 9-combustion chamber wall surface is closed layer; 10-heat shield.
Fig. 6 is the profile of doing along the center of the axis of whole burner in the utility model (being the axis of air inlet pipe 4) and entry of combustion chamber 6, wherein, and 1-combustion chamber; 2-inlet plenum; 3-exhaust chamber; 4-air inlet pipe; 5-blast pipe; 6-entry of combustion chamber; 7-exhaust outlet of combustion chamber; 8-anchor post; 9-combustion chamber wall surface is closed layer; 10-heat shield.
Fig. 7 is the profile of doing through the circular section at center, combustion chamber in the utility model, wherein, and 6-entry of combustion chamber; 9-combustion chamber wall surface is closed layer; 11-inlet plenum shell; 12-exhaust chamber shell; 13-boost line.
the specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, referring to Fig. 5, the utlity model has an oblate cylinder combustion chamber, premixed gas enters from air inlet pipe, the heating by the exhaust gases of flowed through in intake process blast pipe and exhaust chamber, and the combustion gas after being preheated enters combustion chamber from three entrances respectively, gas forms eddy flow in combustion chamber, realize trapped vortex combustion, the high temperature of burning is by Wall Radiation material, from combustor surface radiation.
Referring to Fig. 6 and Fig. 7, wherein, 1-combustion chamber; 2-inlet plenum; 3-exhaust chamber; 4-air inlet pipe; 5-blast pipe; 6-entry of combustion chamber; 7-exhaust outlet of combustion chamber; 8-anchor post; 9-combustion chamber wall surface is closed layer; 10-heat shield; 11-inlet plenum shell; 12-exhaust chamber shell; 13-boost line, described boost line is in the plane at place, center circle cross section, combustion chamber, take the center of combustion chamber is the center of circle, the circular boost line that the radius of doing is 10.8mm.Its objective is as determining cut-off place (terminal position of the entrance pipeline section that burns) of three entry of combustion chamber pipeline sections.
In the present embodiment, the diameter a of exhaust outlet of combustion chamber 7 is 2.4mm, equate with the diameter b of air inlet pipe 4, spacing c between air inlet pipe 4 and blast pipe 5 is 0.8mm, the diameter d of blast pipe 5 is 4mm, the height f of whole combustion chamber 1 is 2mm, the height e of combustion chamber inner chamber is 1mm, combustion chamber inner chamber height is internal face on it and arrives the distance between lower internal face, the h of wall thickness up and down of combustion chamber 1 is 0.5mm, the spacing i of inlet plenum 2 outer walls and exhaust chamber 3 inwalls is 0.6mm, exhaust chamber Shang Xia 3 the spacing j between inwall be 4mm, air inlet pipe 4 is 10mm with the length k of blast pipe 5.
As shown in Figure 7, in the present embodiment, combustion chamber radius R 1 is 10mm, inlet plenum radius R 2 is 12mm, exhaust chamber radius R 3 is 14mm, the radius of a circle that boost line 13 forms is 10.8mm, the width l of entry of combustion chamber is 4mm, and the obtuse angle that entry of combustion chamber pipeline section becomes with entry of combustion chamber wide line is 150 °.
Claims (2)
1. an eddy flow micro-burner that utilizes heating by the exhaust gases, it is characterized in that: comprise combustion chamber (1), inlet plenum (2), exhaust chamber (3), air inlet pipe (4), blast pipe (5), combustion chamber (1), inlet plenum (2), exhaust chamber (3) is oblate cylinder, air inlet pipe (4), blast pipe (5) is cylinder, the inside of inlet plenum (2) is located in combustion chamber (1), its top is connected with the top inner surface of inlet plenum (2), combustion chamber (1) is provided with three entry of combustion chamber (6), be located at respectively side, combustion chamber (1), / 3rd circular arcs of being separated by between each entry of combustion chamber (6), the round edge tangent line angle of the axis of entry of combustion chamber (6) and combustion chamber (1) is 30 degree, exhaust outlet of combustion chamber (7) is located at the center of circular section, top, combustion chamber (1), is shaped as circle, and its center of circle is positioned on the axis of combustion chamber (1), inlet plenum (2) lower surface center is provided with air inlet pipe (4), and sectional area is identical with exhaust outlet of combustion chamber (7), inlet plenum (2) is located in exhaust chamber (3), by anchor post (8), be connected, exhaust chamber (3) lower surface center is provided with blast pipe (5), sectional area is greater than air inlet pipe (4), the skin of exhaust chamber (3) and blast pipe (5) is provided with one deck heat-barrier material, and the center of circle of combustion chamber (1), inlet plenum (2), exhaust chamber (3), air inlet pipe (4), blast pipe (5) on an axis.
2. a kind of eddy flow micro-burner that utilizes heating by the exhaust gases according to claim 1, it is characterized in that: described combustion chamber (1) jointly forms combustion chamber wall surface by Wall Radiation material and photovoltaic cell module and closes layer (9) formation, and photovoltaic cell module is in Wall Radiation outer material side; Described heat-barrier material is made by aluminium foil, specifically by aluminium foil veneer, polyethylene film, fibrous braid, metal deposit, by PUR lamination, is formed; Described inlet plenum (2) and exhaust chamber (3) are made by steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320445030.4U CN203907607U (en) | 2013-07-24 | 2013-07-24 | Rotational flow microburner preheated via waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320445030.4U CN203907607U (en) | 2013-07-24 | 2013-07-24 | Rotational flow microburner preheated via waste gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203907607U true CN203907607U (en) | 2014-10-29 |
Family
ID=51781882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320445030.4U Expired - Fee Related CN203907607U (en) | 2013-07-24 | 2013-07-24 | Rotational flow microburner preheated via waste gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203907607U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411219A (en) * | 2013-07-24 | 2013-11-27 | 江苏大学 | Turbulent micro burner preheated by exhaust gas |
| CN108870423A (en) * | 2018-08-31 | 2018-11-23 | 南通腾宇环保设备有限公司 | A kind of heat-accumulating type high-temperature oxidation gaseous effluent processing unit and its processing method |
-
2013
- 2013-07-24 CN CN201320445030.4U patent/CN203907607U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411219A (en) * | 2013-07-24 | 2013-11-27 | 江苏大学 | Turbulent micro burner preheated by exhaust gas |
| CN108870423A (en) * | 2018-08-31 | 2018-11-23 | 南通腾宇环保设备有限公司 | A kind of heat-accumulating type high-temperature oxidation gaseous effluent processing unit and its processing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105737152B (en) | A kind of burner for being classified premixed swirl low nitrogen burning | |
| CN103090384A (en) | Regenerative microscale burner filled with porous media | |
| CN101539293B (en) | Micro parallel plate burner with preheating channel | |
| CN201093488Y (en) | Horizontal shade type micro oil mass igniting powdered coal burner | |
| CN201699625U (en) | Portable micro thermophotovoltaic device | |
| CN203907607U (en) | Rotational flow microburner preheated via waste gas | |
| CN103411219A (en) | Turbulent micro burner preheated by exhaust gas | |
| CN107726302B (en) | The micro-burner of flame holding is strengthened in a kind of gas preheating | |
| CN203615331U (en) | Bidirectional gas intake back-heating micro-scale burner filled with porous medium | |
| CN101860280B (en) | Mini combustion-type semiconductor thermo-electric generator | |
| CN207880834U (en) | A kind of microminiature swiss roll burner suitable for non-premixed combustion | |
| CN208058829U (en) | A kind of combined type minute yardstick backheating type burner | |
| CN112283686A (en) | Hydrogen-burning heat exchanger | |
| CN107726321A (en) | It is a kind of that the micro-burner that flame holding is improved with strengthening backflow is preheated based on gas | |
| CN104848217B (en) | A kind of head of combustion chamber of hypersonic high enthalpy ground-based simulation equipment | |
| CN207407341U (en) | A kind of micro-combustor | |
| CN208025504U (en) | A kind of coal burner | |
| CN108131670B (en) | Microminiature Swiss coil burner suitable for non-premixed combustion | |
| CN203744238U (en) | Tangential and direct flows combined combustion stabilizing and heat storage combusting device suitable for low-calorific-value fuel gas | |
| CN201656858U (en) | Micro combustion semi-conductor thermoelectric generator | |
| CN105864766B (en) | A kind of multicenter combustor | |
| CN105402725B (en) | A kind of miniature disperse formula burner for micro thermo optoelectronic system | |
| CN101691201A (en) | Novel power device for generating electric energy and thrust based on micro-combustion | |
| CN108087871A (en) | A kind of coal burner | |
| CN107795993A (en) | A kind of micro-combustor for possessing multilayer wall structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20150724 |
|
| EXPY | Termination of patent right or utility model |