CN202630049U - Pulverized coal burner - Google Patents
Pulverized coal burner Download PDFInfo
- Publication number
- CN202630049U CN202630049U CN 201220261585 CN201220261585U CN202630049U CN 202630049 U CN202630049 U CN 202630049U CN 201220261585 CN201220261585 CN 201220261585 CN 201220261585 U CN201220261585 U CN 201220261585U CN 202630049 U CN202630049 U CN 202630049U
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- pulverized coal
- coal
- coal burner
- main body
- air channel
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Abstract
A pulverized coal burner comprises a pulverized coal conveying system, a pulverized coal burner main body, a spare oil fuel system, a burning channel and a coal fan inlet, pulverized coal conveying system is connected with the pulverized coal burner main body through a connecting soft pipe; the pulverized coal burner main body is communicated with the burning channel; the pulverized coal burner main body mainly comprises a pulverized coal gun, ventilating ducts and an air amount adjusting mechanism; the pulverized coal gun is positioned at the central position of the pulverized coal burner main body; the oil pipe is positioned inside a pipe of the pulverized coal gun and communicated with an oil spraying pipeline; three ventilating ducts are provided; a primary air channel is positioned at the center of the pulverized coal burner; conical cyclone blades are installed at the back end of the primary air channel; the primary air channel forms an inner barrel of a secondary air channel inside the pulverized coal burner main body; the inner barrel and an outer barrel of the secondary air channel are conical; angle-adjustable cyclone blades are arranged at the back end of the secondary air channel; the tertiary air channel is provided with a plurality of ventilating holes; and the ventilating holes of the tertiary air channel are communicated with ventilating holes of the burning channel. The pulverized coal burner can effectively control the combustion condition integrally and is energy-saving, high in efficiency, green and environment-friendly.
Description
Technical field
The utility model relates to a kind of coal powder burner, particularly a kind of coal burner that is applicable in energy-efficient, the environmental protection pulverized-coal fired boiler corollary equipment.
Background technology
At present, China is the big country that the world today produced and used Industrial Boiler, and in the following quite a long time, coal-burned industrial boiler will be the leading products of China.But coal-burning boiler in the past can produce serious environmental to be polluted and poor efficiency, along with energy-conserving and environment-protective require increasingly stringent, uses the novel high-efficient energy-saving environment-friendly pulverized-coal fired boiler and will be widelyd popularize.Therefore adopting efficient, energy-conservation, the low contaminated industry boiler of clean combustion technology will be the trend of production development.
In recent years; Country expressly promotes coal water slurry boiler; Water-coal-slurry is as the important component part of Chinese clean coal technology; Through technological development, industrial experiment and the commercial Demonstration Application of recent two decades, demonstrated the generation that it had oily, energy-conservation, efficient combustion and many advantages such as low pollutions, but still had the problem of two aspects: the one, waste heat energy---water-coal-slurry elder generation from burner hearth is burnt water evaporates again; The 2nd, the water-coal-slurry manufacture craft is loaded down with trivial details, needs in storage, the transportation to stir waste of manpower, material resources always.Therefore, adopt with the coal water slurry boiler combustion efficiency quite again can coal-fired powder boiler convenient and simple, efficient energy-saving the trend that will be production development.
Coal dust efficient burning technology and low NOx combusting technology are two kinds of technology of contradiction each other all the time.Reduce NOx generate be to control the temperature of combustion zone with discharging at all can not be too high; But low-temperature burning influences the combustion rate of coal dust again; Coordinating these two The Application of Technology, to make it to reach comprehensive optimum efficiency be purpose, in fact just requires the overall process that coal dust burns is controlled.Can either guarantee the stability of coal powder ignition, lower ignition temperature is arranged again, have sufficiently long simultaneously and guarantee burning time at a certain temperature to burn.Still there is not only the thermal efficiency high energy-conservation but also guarantee that the product of the coal powder burner of environmental protection burning comes out up to now.
The utility model content
The utility model is to the deficiency of loaded down with trivial details, the poor efficiency of prior art processes, contaminated environment, provides a kind of energy-efficient, the coal burner of safety and environmental protection.
Realize that the technical scheme that above-mentioned purpose adopts is: a kind of coal burner; Comprise coal powder conveying system, coal burner main body, reserve fuel system, fire trough, coal fans entrance; Coal powder conveying system is connected with the coal burner main body through connecting flexible pipe, and the coal burner main body is communicated with fire trough:
A. described coal burner main body mainly is made up of coal dust rifle, ventilating duct, air quantity governor motion, and the coal dust rifle is positioned at the center of coal burner main body; Oil pipe is positioned at the coal dust gun barrel, communicates with injection tubing;
B. ventilating duct is set to three, is followed successively by wind, secondary wind, tertiary air.One time wind is positioned at the coal burner center, and the conical cyclone leaf is equipped with in the rear end; A wind passage forms the inner core of secondary air channel in the coal burner main body, the inside and outside tube of secondary air channel is conical structure, and the rear end of secondary air channel is provided with the whirlwind sheet of adjustable angle; The tertiary air passage has a plurality of air vents, and the air vent of tertiary air passage communicates with the air vent of fire trough.
The whirlwind sheet adjustment angle that the rear end of secondary air channel is provided with is 0 °-90 °.
Adopt technique scheme, compared with prior art, the utility model is provided with three ventilating ducts; And the primary and secondary air passage is a pyramidal structure, is used the fire trough of special construction, forms one deck air film at the fire trough wall; Can cooling combustion road wall, reach overfiring-proof, anticlogging purpose, because wind and the 60-70% of secondary wind air quantity sum for the required total air of burning; Make coal dust in the primary combustion process, be in the anoxycausis state, can effectively avoid the generation of NOx.Control the temperature of combustion chamber through the air quantity in the adjusting tertiary air passage; Simultaneously, the air that completing combustion is required blows to the fire trough outlet along the fire trough inwall fully to be mixed with spent anoxic flame, reaches the second-time burning of coal dust and the effect completely of burning; Because the fire trough outlet is burner hearth; Make burned flame spread cooling rapidly, guaranteeing to have reduced generation and the discharging of NOx under the clean-burning prerequisite of coal dust.And the combustion system of diffused, have good adjusting function, different regulative modes can be arranged the coal of different calorific values; Especially the adjustable angle whirlwind sheet that is provided with of secondary air channel rear end; Adjusting range is 0 °-90 °, can control the rotation direction of secondary wind fully, the size that can effectively regulate exit flow angle of flare and recirculating zone; From integral body control combustion position, efficient energy-saving, environmental protection have really been accomplished.
Description of drawings
Fig. 1 is the overall structure sketch map of the utility model.
Fig. 2 is the burner sketch map.
Among the figure: fines storehouse 1, screw(-type) feeder 2, impact flow meter 3, strength helicoidal pump 4, mixing chamber 5; Connect flexible pipe 6, center coal dust rifle 7, coal burner main body 8, fire trough 9, oil pipe 10; Reserve fuel system 11, transfer pipeline 12,13, wind passages 14 of coal fans entrance, secondary air channel 15; Tertiary air passage 16, conical cyclone leaf 17, secondary air duct whirlwind sheet 18, secondary air duct whirlwind sheet rotating shaft 19, secondary air duct whirlwind sheet swivel joint 20; Secondary air duct whirlwind sheet rotating ring 21,22, wind governor motions 23 of secondary air duct whirlwind sheet adjusting rod, secondary wind governor motion 24, tertiary air governor motion 25.
The specific embodiment
Below in conjunction with accompanying drawing and instance the utility model is further specified.
Referring to accompanying drawing 1-2, in the present embodiment, this coal burner is mainly by coal burner main body 8, and center coal dust rifle 7 is formed.Coal burner main body 8 is used with fire trough 9, coal powder conveying system, reserve fuel system 11.
See Fig. 1, coal powder conveying system is mainly by fines storehouse 1, screw(-type) feeder 2; The gentle wrench of a force system pump of impact flow meter 34, mixing chamber 5 are formed, and fines storehouse 1 is positioned at the top of screw(-type) feeder 2, connects screw(-type) feeder 2 on the impact flow meter 3; Under connect strength helicoidal pump 4, mixing chamber 5 is positioned at the below of strength helicoidal pump 4, the outlet of mixing chamber 5 is connected on the transfer pipeline 12; Transfer pipeline 12 1 ends are connected with coal fans entrance 13, and the other end links to each other with center coal dust rifle 7 through connecting flexible pipe 6.
See Fig. 2, coal burner main body 8 is mainly by center coal dust rifle 7, a wind passage 14, secondary air channel 15, and tertiary air passage 16 and a wind governor motion 23, secondary wind governor motion 24, tertiary air governor motion 25 is formed.Center coal dust rifle 7 is positioned at the center of coal burner main body 8, and coal dust rifle 7 centers are oil pipe 10, and oil pipe 10 links to each other with reserve fuel system 11.
See Fig. 2; Coal burner main body 8 is a tubular structure, and three ventilating ducts are set, and three ventilating ducts are arranged successively and are positioned at coal burner main body 8; Wherein a wind passage 14 is a conical structure; 17, wind passages 14 of conical cyclone leaf form secondary air channel 15 in coal burner main body 8 inner core is equipped with in the rear end of a wind passage 14, and the inside and outside tube of secondary air channel 15 is conical structure; The rear end of secondary air channel 15 is provided with a plurality of secondary air duct whirlwind sheets 18, and tertiary air passage 16 communicates with the air vent of fire trough 9.Wherein each sheet secondary air duct whirlwind sheet 18 is installed on the secondary air duct whirlwind sheet rotating shaft 19 one to one; The top of each sheet secondary air duct whirlwind sheet 18 connects secondary air duct whirlwind sheet swivel joint 20; Secondary air duct whirlwind sheet swivel joint 20 all is welded on the secondary air duct whirlwind sheet rotating ring 21, and secondary air duct whirlwind sheet rotating ring 21 links to each other with secondary air duct whirlwind sheet adjusting rod 22.
The operation principle of the utility model: coal dust is through having the fines storehouse 1 of electronic arc valve control; Fall into the screw(-type) feeder 2 of below; Send in the impact flow meter 3 by screw(-type) feeder 2 again; Measure the flow size by impact flow meter 3, and flow according to actual needs adjusts the rotating speed of screw(-type) feeder 2, thereby realize normal feed.Coal dust is through getting into the material feeding box of strength helicoidal pump 4 after the metering of impact flow meter 3; Through spiral conveying mechanism coal dust is sent into the mixing chamber 5 of strength helicoidal pump 4, and the air gaslift of being sent into by coal fans entrance 13, and send into transfer pipeline 12; Get into coal burner main body 8 through connecting flexible pipe 6; Coal dust via the 7 even continuous ejections of center coal dust rifle, and forms eddy current after getting into coal burner main body 8 at short notice.Because one time wind passage 14 is conical; The rear installs conical cyclone leaf 17 additional, secondary air channel 15 inner/outer tubes all coning, the rear installs multi-disc secondary air duct whirlwind sheet 18 additional; Therefore formed good aerodynamic field in the primary and secondary air passage; Make coal dust and air in good time, mix uniformly, not only catch fire rapidly, can also prevent slagging scorification.Wind of the utility model is weak rotation, and secondary wind rotation direction and intensity are adjustable.Through regulating secondary wind governor motion 24, the intensity of secondary wind is changed.Rotate secondary air duct whirlwind sheet adjusting rod 22 according to combustion conditions simultaneously, can make angle variation of secondary air duct whirlwind sheet 18, accurately control the rotation direction and the swirl strength of secondary wind from 0 ° to 90 °.Wind governor motion of fit adjustment 23 and secondary wind governor motion 24 make wind and secondary wind reach the The Best Mixed point.The primary and secondary air of this utility model has good adjusting function, can join combustion air for the coal of different calorific values, therefore can adapt to different coals.
Wind of the utility model accounts for the 20-30% of the required total air of burning, and secondary wind accounts for the 30-50% of the required total air of burning.Owing to have above-mentioned performance, the size that can effectively regulate exit flow angle of flare and recirculating zone makes coal burner exit fuel distributed uniform, and air distribution is reasonable, and is strong to guarantee to catch fire in time, to burn.The existing axial injection space rate of the flame of the utility model also has the tangential-velocity component of rotary-jet, and the flame recirculating zone is more moderate, makes the solid particulate carbonaceous that do not burn get into the negative pressuren zone in spout the place ahead through the recirculating zone, reaches the purpose that rekindles.Therefore, the flame of this product ejection is highly stable, and further improves the combustion rate of coal dust.The flame profile of this burner ejection is the swirl flame of hollow type, thereby reaches Industrial Stoves and combustion of industrial boiler interior flame temperature equalization and the good purpose of flame degree of filling.
The tertiary air of burner body accounts for the 20-50% of the required total air number of burning, through tertiary air passage 16, is used with the fire trough that has air vent 9, and in the wall formation air film cooling of fire trough 9, but the wall in cooling combustion road 9, overfiring-proof, anti-slagging scorification.And; Through regulating tertiary air governor motion 25, the surplus air that completing combustion is required blows to the fire trough outlet along the fire trough inwall fully to be mixed with spent anoxic flame, reaches the clean-burning effect of coal dust; Because the fire trough outlet is burner hearth; Make burned flame spread cooling rapidly, guaranteeing to have reduced generation and the discharging of NOx under the clean-burning prerequisite of coal dust.Wind governor motion 23 wherein, secondary wind governor motion 24, tertiary air governor motion 25 is all accurately regulated through YE.
When coal powder conveying system breaks down, launch reserve fuel system 11, for device provides fuel.
Claims (2)
1. coal burner; Comprise coal powder conveying system, coal burner main body, reserve fuel system, fire trough, coal fans entrance; Coal powder conveying system is connected with the coal burner main body through connecting flexible pipe, and the coal burner main body is communicated with fire trough, it is characterized in that:
A. described coal burner main body mainly is made up of coal dust rifle, ventilating duct, air quantity governor motion, and the coal dust rifle is positioned at the center of coal burner main body; Oil pipe is positioned at the coal dust gun barrel, communicates with injection tubing;
B. ventilating duct is set to three, is followed successively by wind, secondary wind, tertiary air; One time wind is positioned at the coal burner center, and the conical cyclone leaf is equipped with in the rear end; A wind passage forms the inner core of secondary air channel in the coal burner main body, the inside and outside tube of secondary air channel is conical structure, and the rear end of secondary air channel is provided with the whirlwind sheet of adjustable angle; The tertiary air passage has a plurality of air vents, and the air vent of tertiary air passage communicates with the air vent of fire trough.
2. coal burner according to claim 1 is characterized in that, the whirlwind sheet adjustment angle that the rear end of described secondary air channel is provided with is 0 °-90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220261585 CN202630049U (en) | 2012-06-05 | 2012-06-05 | Pulverized coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220261585 CN202630049U (en) | 2012-06-05 | 2012-06-05 | Pulverized coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202630049U true CN202630049U (en) | 2012-12-26 |
Family
ID=47383244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220261585 Withdrawn - After Issue CN202630049U (en) | 2012-06-05 | 2012-06-05 | Pulverized coal burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202630049U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679339A (en) * | 2012-06-05 | 2012-09-19 | 唐山市金沙工贸有限公司 | Pulverized coal burner |
| CN109578989A (en) * | 2019-01-17 | 2019-04-05 | 江苏羚羊水泥工程技术有限公司 | A kind of efficiently low vertical coal dust furnace of nitrogen |
| CN110186036A (en) * | 2019-06-17 | 2019-08-30 | 华北电力大学 | A kind of low nitrogen turbulent burner of microfine coal heterogeneous reduction and remodeling method |
-
2012
- 2012-06-05 CN CN 201220261585 patent/CN202630049U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679339A (en) * | 2012-06-05 | 2012-09-19 | 唐山市金沙工贸有限公司 | Pulverized coal burner |
| CN102679339B (en) * | 2012-06-05 | 2014-05-07 | 唐山市金沙工贸有限公司 | Pulverized coal burner |
| CN109578989A (en) * | 2019-01-17 | 2019-04-05 | 江苏羚羊水泥工程技术有限公司 | A kind of efficiently low vertical coal dust furnace of nitrogen |
| CN109578989B (en) * | 2019-01-17 | 2024-04-09 | 江苏羚羊水泥工程技术有限公司 | Low-nitrogen vertical pulverized coal combustion furnace |
| CN110186036A (en) * | 2019-06-17 | 2019-08-30 | 华北电力大学 | A kind of low nitrogen turbulent burner of microfine coal heterogeneous reduction and remodeling method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121226 Effective date of abandoning: 20140507 |
|
| RGAV | Abandon patent right to avoid regrant |