CN203718770U - Dual-grille charged spraying micro liquid combustor - Google Patents
Dual-grille charged spraying micro liquid combustor Download PDFInfo
- Publication number
- CN203718770U CN203718770U CN201420049479.3U CN201420049479U CN203718770U CN 203718770 U CN203718770 U CN 203718770U CN 201420049479 U CN201420049479 U CN 201420049479U CN 203718770 U CN203718770 U CN 203718770U
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- CN
- China
- Prior art keywords
- pipe
- grid
- grille
- combustion
- liquid
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- Expired - Lifetime
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- 239000007788 liquid Substances 0.000 title claims abstract description 54
- 238000005507 spraying Methods 0.000 title abstract 6
- 239000000446 fuel Substances 0.000 claims abstract description 38
- 239000007921 spray Substances 0.000 claims description 15
- 229910010293 ceramic material Inorganic materials 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 24
- 238000000889 atomisation Methods 0.000 abstract description 8
- 238000002309 gasification Methods 0.000 abstract description 3
- 230000005684 electric field Effects 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 description 8
- 230000008020 evaporation Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Abstract
The utility model discloses a dual-grille charged spraying micro liquid combustor. The dual-grille charged spraying micro liquid combustor comprises a pipe A, a pipe B, a pipe C, a pipe D and air inlet pipes, wherein a liquid fuel spraying pipe is arranged in the pipe A; the symmetrical air inlet pipes are arranged on the left side wall of the pipe A; an annular electrode is arranged between the pipe A and the pipe B; a liquid droplet collecting grille is arranged between the pipe B and the pipe C; a combustion grille is arranged between the pipe C and the pipe D; an ignition needle of an igniter penetrates through the pipe wall of the pipe D and is placed on the right of the combustion grille. According to the dual-grille charged spraying micro liquid combustor, the shape of the needle is combined with the annular electrode according to the combustion characteristics of a liquid fuel under micro-scale conditions, and the liquid droplet collecting grille and the combustion grille are designed separately; the charged atomization, the evaporative gasification and the combustion of the liquid fuel can be performed in an approximately staged way; the stability and the complete combustion of the liquid fuel under the micro-scale conditions are realized; the aim of complex combustion control is indirectly fulfilled by simple electric field parameter control; the dual-grille charged spraying micro liquid combustor has innovativeness in principle.
Description
Technical field
The utility model relates to micro liquid fuel burner, particularly a kind of two grid electrostatic charged spray minisize liquid burner.
Background technology
Microburner has important application in the middle of micro-energy resource system, utilize the micro-energy resource system that hydrogen and hydrocarbon are fuel, energy density is about tens times of traditional chemical battery, can overcome energy density little (service time is short) that chemical cell exists, the shortcoming such as volume and weight is large, the charging interval is long; The density of liquid fuel is larger, and in same volume, reserves are larger, be beneficial to sustained combustion, and security are better, stores transport more convenient, and energy density is higher, and therefore, the microburner of liquid fuel has huge application potential.
Under miniature scale, combustion chamber features size has approached or has been less than the quenching diameter (or quenching distance) of fuel, thereby combustion instability is sharply increased.Compared with conventional yardstick combustion process, miniature scale burning is faced with many challenges, such as radiation loss is large, the admixture of gas time of staying is short, the restriction of material aspect and the wall extinguishing of chemical primitive.
The boiling point of liquid fuel is usually less than ignition temperature, and its combustion process can roughly be divided into three steps: 1. evaporation; 2. mix; 3. burning.Because mixing velocity is fast, burning velocity is common also higher, and liquid burning velocity usually depends on the slowest evaporation rate.
Liquid burning is different from the out-phase chemical reaction of solid combustion, can only be in surface evaporation, and burning on the flame front with a certain distance from drop surface; Fluid combustion is different from the homogeneous phase diffusion combustion of gaseous fuel, before mixing with air, there is evaporation gasification in liquid fuel, liquid fuel need to be additional time and space evaporate and mix, in minute yardstick combustion system, Reynolds number is generally very low, and the speed of liquid evaporation and mixing is conventionally very slow.Therefore, in the microburner that uses liquid fuel, adopt electrostatic charged spray combustion technology to seem particularly important.
Summary of the invention
The purpose of this utility model is that the shortcoming that overcomes prior art, with not enough, provides a kind of two grid electrostatic charged spray minisize liquid burner.Electrostatic charged spray makes the rapid atomization of liquid fuel, accelerates its evaporation process; Unique two grill designs make the further atomization of fine droplet and fully mix better with air, thereby realize the smooth combustion of liquid fuel.
The utility model is achieved through the following technical solutions:
A kind of two grid electron spray minisize liquid burner, comprises A pipe, B pipe, C pipe, D pipe and igniter; In A pipe, liquid fuel nozzle is set, at A pipe left side wall, symmetrical air intake pipe is set, between A pipe and B pipe, be provided with annular electrode, between B pipe and C pipe, be provided with drop and collect grid, between C pipe and D pipe, burning grid is set; The ignition electrode of igniter passes the tube wall of D pipe, and is placed in the right-hand of burning grid.
Described liquid fuel nozzle is connected with high-voltage DC power supply is anodal, and described annular electrode is connected with another high-voltage DC power supply is anodal, and described drop is collected grid ground connection.
Described liquid fuel nozzle is made up of one or several capillary.
Described liquid fuel jet pipe, annular electrode, drop collect grid and burning grid is made up of metal material.
Described A pipe, B pipe, C pipe, D pipe are bolted.
Described A pipe, B pipe, C pipe, D pipe and air intake pipe all adopt ceramic material to make, as SiO
2, SiC, Si
3n
4or Al
2o
3and so on ceramic material.
The cross section of described A pipe, B pipe, C pipe, D pipe and air intake pipe is circular cross-section.
The utility model has the following advantages compared with prior art:
(1) the utlity model has the electrostatic charged spray minisize liquid burner of two cell structures, according to the characteristic of liquid fuel combustion under minute yardstick condition, aciculiform is combined with annular electrode, and drop is collected to grid and divide and be arranged with burning grid, can impel the charged atomization of liquid fuel, evaporation gasification and burning to be similar to carries out stage by stage, realize the stable and completing combustion of liquid fuel under minute yardstick condition, and reach the object that is indirectly realized complicated burning control by simple electric pulse field parameter control, there is the novelty in principle.
(2) liquid fuel of the present utility model is flowed out from liquid fuel nozzle by Miniature injection pump control flow, and air enters from air intlet pipe, and the adjustment of its flow adopts the control of gas flow measuring device to carry out, and can regulate exactly equivalent proportion, makes fuel smooth combustion.
(3) the utility model is provided with two grids, compared with only having the burner of a grid, except wall wet zone, can realize the evaporation atomization of liquid fuel, and the grid areas of burning on right side is to approach the mode smooth combustion of gas combustion.Left side grid is as drip collector, and now size droplet diameter is larger, and the mesh of collecting grid is also larger, is convenient to drop and passes through and further atomization; Right side grid is as gas stabilizer, and the mesh of burning grid is designed to regular hexagon or the circle that the lines flow smoothly, and mesh is corresponding dwindling also, not only makes gas discharge smoothly, can also extend the time of staying of gas on burning grid, makes burning more abundant; Distance between two grids is 3mm-6mm.Atomization and mixing that two grids are drop provide space, have avoided drop to contact with the direct of flame.
(4) igniter of the present utility model makes ignition operation simpler, convenient, and the practicality in engineering is stronger.
(5) A pipe, B pipe, C pipe, D pipe and air intake pipe all adopt ceramic material, high temperature resistant, have further improved flame holding and efficiency of combustion.
(6) the utility model technology has that quality is light, volume is little, and technological means is simple and easy to do, can realize small processing and factory's batch production, has broad application prospects.
Brief description of the drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is fuel and air intake place cross section structure schematic diagram;
Fig. 3 is the partial structurtes schematic diagram that drop is collected grid place;
Fig. 4 is the partial structurtes schematic diagram at burning grid place.
Detailed description of the invention
Below in conjunction with concrete example, the utility model is more specifically described in detail.
Exemplifying embodiment
As shown in Figures 1 to 4.This pair of grid electrostatic charged spray microburner, comprises A pipe 3, B pipe 5, C pipe 7 and D pipe 10 from left to right successively; In A pipe 3, liquid fuel jet pipe 2 is set, manages 3 left side walls at A and design symmetrical air intake pipe 1, between A pipe 3 and B pipe 5, be provided with annular electrode 4, between B pipe 5 and C pipe 7, be provided with drop and collect grid 6, between C pipe 7 and D pipe 10, burning grid 8 is set; The ignition electrode of igniter 9 is managed 10 tube wall through D, and is placed in the right-hand of burning grid 8.
Described liquid fuel nozzle 2 is connected with high-voltage DC power supply (dc source voltage is 1-5kV) is anodal, and described annular electrode 4 is connected with another high-voltage DC power supply (dc source voltage is 1-5kV) is anodal, and described drop is collected grid 6 ground connection.
Described liquid fuel nozzle 2, annular electrode 4, drop collect grid 6 and burning grid 8 is made up of metal material.
Described A pipe 3, B pipe 5, C pipe 7, D pipe 10 are all bolted, annular electrode 4 is fixed between A pipe 3 and B pipe 5, between B pipe 5 and C pipe 7, drop is set and collects grid 6, burning grid 8 is placed in the middle of C pipe 7 and D pipe 10, contact-making surface between A pipe 3, B pipe 5, C pipe 7, D pipe 10 can, through coarse processing, be convenient to fix.
The ignition electrode of described igniter 9, through the tube wall of D pipe 10, is placed in the right-hand of burning grid 8.
Described liquid fuel nozzle 2 can adopt single or many stainless steel capillaries formations.Internal diameter capillaceous is 0.3mm-1.0mm, and external diameter is 0.5mm-1.2mm.Stainless annular electrode 4 internal diameters are 2.5mm-6.0mm.From nozzle to annular electrode, the axial distance in left side is 1mm-3mm.Grid is made up of multiple little grids, also can adopt stainless steel material.
Described A pipe 3, B pipe 5, C pipe 7, D pipe 10 and air intlet pipe 1 all adopt ceramic material to make, as SiO
2, SiC, Si
3n
4, or Al
2o
3.
The cross section of described A pipe 3, B pipe 5, C pipe 7, D pipe 10 and air intlet pipe 1 is circular cross-section.
The internal diameter of described A pipe 3, B pipe 5, C pipe 7, D pipe 10 is 3mm-6mm, thickness of pipe wall 0.5mm-1mm; The internal diameter of air intlet pipe 1 is 0.5mm-5mm, thickness of pipe wall 0.2mm-0.5mm; A manages 3 long 5mm-10mm, and B manages 5 long 5mm-8mm, and it is 3mm-5mm that C manages 7 length, and D manages 10 long 10mm-15mm.
When work, due to the effect of the voltage Vc on liquid fuel nozzle 2, liquid forms taper at capillary outlet place, in the end of jet because external disturbance is broken into little droplet; Voltage V on annular electrode 4
eand forming electric field between drop collection grid 6, charged drop, from annular electrode to collecting grid 6 and being caught by it, has increased the time of staying of drop, makes atomization more abundant; In drop is collected the C pipe 7 between grid 6 and burning grid 8, droplet fully mixes with air, uses igniter 9 by ignited fuel on burning grid right side, and burning grid 8, as stabilizer, is realized the efficient stable burning of fuel.
As mentioned above, just can realize preferably the utility model.
Above-mentioned real example is only preferably embodiment of the utility model; but embodiment of the present utility model is not restricted to the described embodiments; other are any does not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitute, combination, simplify; all should be equivalent substitute mode, within being included in protection domain of the present utility model.
Claims (7)
1. two grid electrostatic charged spray minisize liquid burners, comprise A pipe (3), B pipe (5), C pipe (7) and D pipe (10) from left to right successively; In A pipe (3), liquid fuel jet pipe (2) is set, at A pipe (3) left side wall, symmetrical air intake pipe (1) is set, between A pipe (3) and B pipe (5), be provided with annular electrode (4), between B pipe (5) and C pipe (7), be provided with drop and collect grid (6), between C pipe (7) and D pipe (10), burning grid (8) is set; The ignition electrode of igniter (9) is managed the tube wall of (10) through D, and is placed in the right-hand of burning grid (8).
2. according to claim 1 pair of grid electrostatic charged spray minisize liquid burner, its feature is being, described liquid fuel nozzle (2) is connected with high-voltage DC power supply is anodal, described annular electrode (4) is connected with another high-voltage DC power supply is anodal, and the drop between B pipe (5) and C pipe (7) is collected grid (6) ground connection.
3. according to claim 2 pair of grid electrostatic charged spray minisize liquid burner, its feature is being that liquid fuel nozzle (2), annular electrode (4) drop collect grid (6) and burning grid (8) is made by metal material.
4. according to claim 3 pair of grid electrostatic charged spray minisize liquid burner, its feature is being that described A pipe (3), B pipe (5), C pipe (7) and D pipe (10) are bolted.
5. according to claim 3 pair of grid electrostatic charged spray minisize liquid burner, its feature is being that described A pipe (3), B pipe (5), C pipe (7), D pipe (10) and air intake pipe (1) all adopt ceramic material to make.
6. according to claim 5 pair of grid electrostatic charged spray minisize liquid burner, its feature is being that described ceramic material adopts SiO
2, SiC, Si
3n
4or Al
2o
3in wherein a kind of.
7. according to claim 5 pair of grid electrostatic charged spray minisize liquid burner, its feature is being that the cross section of described A pipe (3), B pipe (5), C pipe (7) and D pipe (10) is circular cross-section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420049479.3U CN203718770U (en) | 2014-01-24 | 2014-01-24 | Dual-grille charged spraying micro liquid combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420049479.3U CN203718770U (en) | 2014-01-24 | 2014-01-24 | Dual-grille charged spraying micro liquid combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203718770U true CN203718770U (en) | 2014-07-16 |
Family
ID=51157916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420049479.3U Expired - Lifetime CN203718770U (en) | 2014-01-24 | 2014-01-24 | Dual-grille charged spraying micro liquid combustor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203718770U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791497A (en) * | 2014-01-24 | 2014-05-14 | 华南理工大学 | Double-grating charging mist spray minitype liquid burner |
-
2014
- 2014-01-24 CN CN201420049479.3U patent/CN203718770U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791497A (en) * | 2014-01-24 | 2014-05-14 | 华南理工大学 | Double-grating charging mist spray minitype liquid burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |
|
| CX01 | Expiry of patent term |