CN101696801B - Little oil burner of double-sided ignition combination blunt body - Google Patents
Little oil burner of double-sided ignition combination blunt body Download PDFInfo
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- CN101696801B CN101696801B CN2009101544026A CN200910154402A CN101696801B CN 101696801 B CN101696801 B CN 101696801B CN 2009101544026 A CN2009101544026 A CN 2009101544026A CN 200910154402 A CN200910154402 A CN 200910154402A CN 101696801 B CN101696801 B CN 101696801B
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- pulverized coal
- coal dust
- combustion chamber
- combustor
- oil
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Abstract
The invention discloses a little oil burner of a double-sided ignition combination blunt body. A primary air pipeline is communicated with a secondary coal dust combustion chamber through a section of coal dust concentrator formed by a tapered pipeline with a throat part formed through invagination, a primary coal dust combustion chamber is arranged in the secondary coal dust combustion chamber, and the secondary coal dust combustion chamber extends into a tertiary coal dust combustion chamber. The upper side surface and the lower side surface of the tertiary coal dust combustion chamber connected with the secondary coal dust combustion chamber are provided with a plurality of secondary air inlets in equal intervals, an upper oil combustion chamber and a lower oil combustion chamber are arranged on the primary coal dust combustion chamber after aslant penetrating through the secondary coal dust combustion chamber, a combination blunt body is arranged at the port of the secondary coal dust combustion chamber, and a plurality of through-flow holes are arranged on the upper surface and the lower surface of the second coal dust combustion chamber positioned in the tertiary coal dust combustion chamber. By adopting the top and bottom arrangement of two oil guns, coal dust entering into the primary coal dust combustion chamber are ignited in a double side way, which strengthens turbulent mass and heat exchange of coal dust current and oil flame to rapidly heat the coal dust and form a fire curtain, thereby prolonging the residence time of the coal dust and strengthening the ignition process.
Description
Technical field
The present invention relates to a kind of coal burner, especially relate to a kind of little oil burner of double-sided ignition combination blunt body.
Background technology
The tiny-oil ignition combustion supporting technology, can finish ignition of the boiler with the oil of trace in the time of can realizing the startup of boiler black furnace, and when blowing out, underload and ultra-low load steady combustion, stablize boiler combustion with the oil of trace, when this combustion technology generally was used for high-volatile coal, oil-saving effect generally can reach more than 90%.But anthracite and meager coal for low volatile can only reach the oil-saving effect about 60%, and its application is very limited.Little oil burner in the past generally all adopts the mode of single-sided arrangement oil gun, and therefore the heating to coal dust is the single face heating; This just causes heat time heating time long, requires the longer dimension of whole coal burner.This is difficult to accomplish for most power plant, therefore how to make coal dust finish in short distance to catch fire, combustion process is to use the problem that the low volatile coal must be faced.Address this problem, can set about from two aspects: the one, increase the cheek that contacts of flame and coal dust to greatest extent, the 2nd, prolong time of contact of coal dust and flame, just prolong the time of staying of coal dust in burner.The present invention has proposed rational solution exactly aspect these two.
Summary of the invention
The object of the present invention is to provide a kind of little oil burner of double-sided ignition combination blunt body, adopt can using the low volatile coal and having the micro-oil ignition coal powder combusting device of good oil-saving effect of square spout.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
Comprise the wind passage in square-section that be connected successively and central axes, pulverized coal concentrator, one-level pulverized coal combustor, secondary pulverized coal combustor and three grades of pulverized coal combustors; One section in airduct road caves in and forms the pulverized coal concentrator that the tapered pipeline of throat constitutes and be communicated with the secondary pulverized coal combustor, and it is indoor that the one-level pulverized coal combustor is installed in the secondary coal dust firing, and the secondary pulverized coal combustor stretches at three grades of coal dust firings indoor.The three grades of upper and lower side of pulverized coal combustor five equilibriums that are connected with the secondary pulverized coal combustor have a plurality of secondary wind inlets, upper and lower two oil combustion chambers are oblique to be installed on the one-level pulverized coal combustor after passing the secondary pulverized coal combustor, secondary pulverized coal combustor port is installed combination blunt body, is positioned at three grades of indoor secondary pulverized coal combustor above and below of coal dust firing and has a plurality of through flow holes.
Described combination blunt body is made of three bluff bodies, upper and lower bluff body is the hexahedron with a rectangular trapezoidal cross section, be symmetrically arranged in secondary pulverized coal combustor exit, middle bluff body is a cross sectional shape positive tetrahedron triangular in shape, its position is on the burner main shaft, and middle bluff body is given prominence to outside two bluff bodies up and down.
The beneficial effect that the present invention has is:
Adopt two oil guns to arrange up and down, can realize the coal dust that enters the one-level pulverized coal combustor is carried out double-sided ignition, strengthened turbulent matter, the heat exchange of breeze airflow and oily flame, heat coal dust rapidly, and form the fire curtain, can to a certain degree prolong the time of staying of coal dust; Thereby strengthened ignition process.
Some circular holes that secondary combustion chamber's wall is offered, its effect is to utilize the characteristic of secondary blast greater than a blast, make part secondary wind pass aperture in addition and enter secondary combustion chamber's formation jet, played the effect that hinders the thin powdered coal air-flow that enters secondary combustion chamber, push it against the middle part, this will strengthen mixing and heat transfer of its high temperature gas flow that comes out with the one-level combustion chamber greatly, quicken the thin powdered coal air-flow ignition process, this strand secondary wind can also the needed air of aftercombustion in addition, and part remedies because the influence that wind air capacity deficiency is brought burning.The existence of group and bluff body has further prolonged the time of staying of coal dust in burner, and forms strong hybrid perturbation in three grades of combustion chambers, and keeps the stable high temperature recirculation zone in bluff body rear, thereby improves ignition condition, improves combustion stability.The micro-oil ignition coal powder combusting device that the present invention provides not only can be used as start-up burner, but also can be used as the burner of main burner and low-load combustion-stabilizing.
Description of drawings
Fig. 1 is the vertical profile structural principle schematic diagram of micro-oil ignition coal powder combusting device of the present invention.
Fig. 2 is the left cutaway view of Fig. 1.
Fig. 3 is the right cutaway view of Fig. 1.
Among the figure: 1, wind passage, 2, pulverized coal concentrator, 3, oil combustion chamber, 4, one-level pulverized coal combustor, 5, secondary pulverized coal combustor, 6, combination blunt body, 7, three grades of pulverized coal combustors, 5.1, through flow hole, 6.1, following bluff body, 6.2, middle bluff body, 6.3, go up bluff body, 7.1, the secondary wind inlet, 7.2, secondary air channel.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
As shown in Figure 1 and Figure 2, the present invention includes the wind passage 1 in square-section that be connected successively and central axes, pulverized coal concentrator 2, one-level pulverized coal combustor 4, secondary pulverized coal combustor 6 and three grades of pulverized coal combustors 7; Airduct road 1 caves in and forms the pulverized coal concentrator 2 that the tapered pipeline of throat constitutes and be communicated with secondary pulverized coal combustor 5 through one section, and one-level pulverized coal combustor 4 is installed in the secondary pulverized coal combustor 5, and secondary pulverized coal combustor 5 stretches in three grades of pulverized coal combustors 7.Three grades of pulverized coal combustors, the 7 upper and lower side five equilibriums that are connected with secondary pulverized coal combustor 5 have a plurality of secondary wind inlets 7.1, upper and lower two oil combustion chambers 3 are oblique to be installed on the one-level pulverized coal combustor 4 after passing secondary pulverized coal combustor 5, secondary pulverized coal combustor 5 ports are installed combination blunt body 6, and secondary pulverized coal combustor 5 above and below that are positioned at three grades of pulverized coal combustors 7 have a plurality of through flow holes 5.1.
(exit is a positive direction) becomes the obtuse angle between the monosymmetric variable cross-section oil combustion chamber that is equipped with up and down in the one-level combustion chamber, its axial line and burner main shaft.
Described variable cross-section oil combustion chamber, its cross sectional shape taper to the oval shape of outlet by the circle of import department.
Described secondary pulverized coal combustor is the extension of a wind passage, its near one-level combustor exit place on the lower wall surface, offer some through flow holes with equidistant respectively, secondary combustion chamber is connected with secondary air channel.
Described three grades of its cross-sectional widths of pulverized coal combustor are equal to secondary pulverized coal combustor cross-sectional width, and depth of section is greater than secondary combustion chamber's depth of section; The slit that lower wall surface forms on itself and the secondary pulverized coal combustor is as secondary air channel.Three grades of pulverized coal combustors be connected with the secondary pulverized coal combustor on the lower wall surface, offer several rectangle ducts respectively, as the secondary wind inlet.
As Fig. 1, shown in Figure 3, described combination blunt body 6 is made of three bluff bodies, upper and lower 6.1,6.3 bluff bodies are the hexahedron with a rectangular trapezoidal cross section, be symmetrically arranged in secondary pulverized coal combustor exit, middle bluff body 6.2 is a cross sectional shape positive tetrahedron triangular in shape, its position is on the burner main shaft, and middle bluff body 6.2 is given prominence to outside two bluff bodies up and down.
Situation is as follows during micro-oil ignition coal powder combusting device real work of the present invention:
A wind carries coal dust and enters wind passage 1 one time, and when by inspissator 2, breeze airflow is concentrated.According to principle of inertia, when the flow area sudden enlargement of breeze airflow, the thick coal culm air-flow will keep inertia and concentrate and to enter one-level combustion chamber 4, and the thin powdered coal air-flow then can deflect and walk around oil combustion chamber from firsts and seconds combustion chamber, two ends intermediate gap up and down and enter secondary combustion chamber 6.To directly wash away the thick coal culm air-flow in both sides up and down at breeze airflow from the oily flame of oil combustion chamber 3 ejections, form violent mass transfer, diabatic process, make the rapid fire burns that heating up also of coal dust; When high-temperature product is flowed through the one-level combustor exit, meet with the mixture of secondary wind that passes through flow hole 5.1 and thin powdered coal air-flow, form violent hybrid perturbation process, this process, promote on the one hand coal dust still imperfect combustion in the one-level combustion chamber heat release that burns away, the ignition time of thin powdered coal air-flow will be shortened greatly on the other hand, the accelerated combustion process.Combustion product that secondary firing is indoor and unburned coal powder arrive outlet will run into group and bluff body, air-flow will pass from the both sides up and down and the centre of bluff body 6.1,6.3, wherein the air-flow that passes from the centre will run into bluff body 6.2, produce shunting, its result, to form three stable high temperature recirculation zones in group and bluff body rear portion, this is to adding the hybrid perturbation of air blast, augmentation of heat transfer, mass transport process will play a key effect, in addition, the existence of bluff body also will prolong gas, the powder mixture time of staying in the combustion chamber, thus help the low volatile coal fire burns.Pass in the mixture that combination blunt body enters three grades of combustion chambers 7, comprise combustion product and unburnt coal dust, because the air capacity in wind breeze airflow is general all in about 15～40% of total air, therefore, if will make the coal dust heat release of burning to greatest extent, must replenish secondary wind.The effect of three grades of combustion chambers is exactly to feed secondary wind, quickens the burning and the after-flame of coal dust.Secondary wind enters secondary air channel 7.2 from import 7.1, enter three grades of combustion chambers 7 then, meet with the mixture that comes out from bluff body 6.1,6.3 shuntings three grades of combustion chamber import departments, because the difference of the two speed and the bias current effect of bluff body 6.1,6.3, cause air-flow to produce violent hybrid perturbation again, finish follow-up combustion process, final high-temperature flue gas sprays into burner hearth by three grades of combustor exits.
At last, it is also to be noted that what more than enumerate only is a specific embodiment of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (1)
1. a little oil burner of double-sided ignition combination blunt body comprises the wind passage in square-section that be connected successively and central axes (1), pulverized coal concentrator (2), one-level pulverized coal combustor (4), secondary pulverized coal combustor (6) and three grades of pulverized coal combustors (7); A wind passage (1) caves in and forms the pulverized coal concentrator (2) that the tapered pipeline of throat constitutes and be communicated with secondary pulverized coal combustor (5) through one section, one-level pulverized coal combustor (4) is installed in the secondary pulverized coal combustor (5), and secondary pulverized coal combustor (5) stretches in three grades of pulverized coal combustors (7); It is characterized in that: the upper and lower side of three grades of pulverized coal combustors (7) five equilibrium that is connected with secondary pulverized coal combustor (5) has a plurality of secondary wind inlets (7.1), upper and lower two oil combustion chambers (3) are oblique to be installed on the one-level pulverized coal combustor (4) after passing secondary pulverized coal combustor (5), secondary pulverized coal combustor (5) outlet port is installed combination blunt body (6), and the above and below that secondary pulverized coal combustor (5) is positioned at the part of three grades of pulverized coal combustors (7) has a plurality of through flow holes (5.1);
Described combination blunt body (6) is made of three bluff bodies, upper and lower (6.1,6.3) bluff body is the hexahedron with a rectangular trapezoidal cross section, be symmetrically arranged in secondary pulverized coal combustor exit, middle bluff body (6.2) is a cross sectional shape positive tetrahedron triangular in shape, its position is on the burner main shaft, and middle bluff body (6.2) is given prominence to outside two bluff bodies up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101544026A CN101696801B (en) | 2009-10-22 | 2009-10-22 | Little oil burner of double-sided ignition combination blunt body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101544026A CN101696801B (en) | 2009-10-22 | 2009-10-22 | Little oil burner of double-sided ignition combination blunt body |
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| Publication Number | Publication Date |
|---|---|
| CN101696801A CN101696801A (en) | 2010-04-21 |
| CN101696801B true CN101696801B (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101544026A Expired - Fee Related CN101696801B (en) | 2009-10-22 | 2009-10-22 | Little oil burner of double-sided ignition combination blunt body |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716074B (en) * | 2016-02-29 | 2018-07-31 | 徐州杰能电力设备有限公司 | Tiny-oil ignition low nitrogen burning system |
| CN107062221A (en) * | 2017-05-22 | 2017-08-18 | 北京醇能科技有限公司 | A kind of low boiling fuel burner |
| CN108930960A (en) * | 2018-07-25 | 2018-12-04 | 汪建军 | A kind of bluff body of environmental protection coal burner |
| CN109751596A (en) * | 2019-02-17 | 2019-05-14 | 山西瓦特网联环能科技有限公司 | Heating in medium frequency steady-burning coal power combustor and application method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061086A (en) * | 1990-10-20 | 1992-05-13 | 华中理工大学 | A kind of coal burner with bluff body |
| CN101135445A (en) * | 2007-10-09 | 2008-03-05 | 中国计量学院 | Micro-oil ignition coal powder combusting device |
| CN201093529Y (en) * | 2007-08-10 | 2008-07-30 | 洛阳博耐特工程技术有限公司 | Two-stage blunt body minim oil lighter |
| CN201103900Y (en) * | 2007-08-29 | 2008-08-20 | 缪琴妹 | Pulverized coal burner for tiny oil ignition |
| CN201507924U (en) * | 2009-10-22 | 2010-06-16 | 中国计量学院 | Micro-oil ignition burner for combined double-sided ignition blunt body |
-
2009
- 2009-10-22 CN CN2009101544026A patent/CN101696801B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061086A (en) * | 1990-10-20 | 1992-05-13 | 华中理工大学 | A kind of coal burner with bluff body |
| CN201093529Y (en) * | 2007-08-10 | 2008-07-30 | 洛阳博耐特工程技术有限公司 | Two-stage blunt body minim oil lighter |
| CN201103900Y (en) * | 2007-08-29 | 2008-08-20 | 缪琴妹 | Pulverized coal burner for tiny oil ignition |
| CN101135445A (en) * | 2007-10-09 | 2008-03-05 | 中国计量学院 | Micro-oil ignition coal powder combusting device |
| CN201507924U (en) * | 2009-10-22 | 2010-06-16 | 中国计量学院 | Micro-oil ignition burner for combined double-sided ignition blunt body |
Non-Patent Citations (1)
| Title |
|---|
| JP平10-38217A 1998.02.13 |
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| CN101696801A (en) | 2010-04-21 |
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Granted publication date: 20110216 Termination date: 20111022 |