CN101140065A - Rotational flow coal powder burner - Google Patents
Rotational flow coal powder burner Download PDFInfo
- Publication number
- CN101140065A CN101140065A CNA2007100773298A CN200710077329A CN101140065A CN 101140065 A CN101140065 A CN 101140065A CN A2007100773298 A CNA2007100773298 A CN A2007100773298A CN 200710077329 A CN200710077329 A CN 200710077329A CN 101140065 A CN101140065 A CN 101140065A
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- guide
- thick
- guide sleeve
- center
- igniter
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Abstract
The invention discloses a swirl pulverized coal burner positioned in a primary air bending pipe and a primary air pipe, which comprises a front thick-thin separation ring, a center guide sleeve with a front end of a center thick-thin separation ring, a supporting plate, an external guide sleeve and an igniter; wherein the front thick-thin separation ring is arranged on the elbow position of the primary air pipe, and the center guide sleeve is connected with the external guide sleeve through the supporting plate. The invention is characterized in that: the igniter can be telescopically radially arranged in the center guide sleeve of the front end of the primary air pipe. The elbow position of the primary air pipe is axially provided with a separation rod guide sleeve, the front end of the separation rod guide sleeve and the center guide sleeve is provided with a telescopic thick-thin separation rod, and the thick-thin separation rod can move back to the interior of the separation rod guide sleeve through an actuator. When the igniter is used, the thick-thin separation rod has an influence on the ignition of the thick phase pulverized coal by the flame; when the igniter is out of use, the thick-thin separation rod restores the distribution of the pulverized coal particles of the original burner, and facilitates the distribution of a flow field and a temperature field in the burner as well as the effect on the boiler performance reduced to the minimum. The invention retains the low NOx of the original burner, and the combustion characteristics and mode of thick exterior and thin interior.
Description
Technical field
The present invention relates to a kind of coal powder burner, relate to a kind of vortex burner specifically.Belong to and use the ignite coal powder burner field of technology of plasma igniting or little oil, be used for the ignition trigger and the low-load combustion-stabilizing of the pulverized-coal fired boiler of front-back wall opposed firing mode, also can make the main burner of pulverized-coal fired boiler, have the characteristics of radially deep or light separation.
Background technology
At present, large-sized boiler generally adopts fuel ignition, and operating cost is higher.And plasma coal dust firing technique and tiny-oil ignition technology solve the safe and practical technology of thermal power plant pulverized-coal fired boiler fuel consume problem just.The general using plasma generator of the burner of this utilization plasma arc firing coal-dust axially inserts, and in the airduct multistage guide is set, and coal dust is distributed step by step and ignited; Enter coal dust in the one-level guide by plasma torch or oily flame ignition after, refire the coal dust that enters in the secondary guide, and by that analogy, the coal dust in the remaining guide is lighted successively.General guide is divided into three grades; In every grade of guide and an airduct, deep or light guide ring is set, makes dense phase pulverized coal enter the central area, be convenient to lighting of coal dust.This burner is general, and all the change to original burner is bigger, flow field, the Temperature Distribution of burner inside, the combustion zone at spout place are all changed, the coal dust of concentrated phase distributes along the center line of burner, so not only influence the performance of burner, can't reply original coal powder light-dark released state; Destroyed the Temperature Distribution that the burner nozzle place enters the burner hearth place simultaneously.
Summary of the invention
The purpose of this invention is to provide a kind of vortex burner, it is not only little to original burner characteristic influence, and is difficult for coking, scaling loss, has higher combustion stability.
The technical solution adopted for the present invention to solve the technical problems is: a kind of vortex burner, in windbend pipe and airduct, center guide, gripper shoe, outer guide and the igniter (plasma generator or little oil gun) of deep or light eseparation ring, the deep or light eseparation ring in front end band center before comprising.Preceding deep or light eseparation ring places the airduct elbow one time, and the center guide connects outer guide by gripper shoe; It is characterized in that: the igniter telescopically radially is arranged in the center guide of front end of an airduct.An airduct elbow separation bar guide is set also axially, at separation bar guide and center guide front end telescopic concentration separation bar is set also, the concentration separation bar can be shunk back to separation bar guide inside by actuator.
In order to protect the flame of igniter, and make the degree of filling of flame higher, the baffle piece also is set in igniter port front portion.The head of described concentration separation bar is protruding.For better water conservancy diversion, described deep or light eseparation ring is that the cross section is leg-of-mutton annulus or semicircular ring.In order to monitor the burner temperature, thermocouple is installed on the diverse location of center guide respectively.For better water conservancy diversion, in a windbend pipe, also be provided with flow distribution plate.
Operation principle of the present invention: when burner is in plasma generator (or little oil gun) fired state, deep or light separation bar is retracted in the separation bar guide through electronic or hydraulic actuator action, plasma generator (or little oil gun) flame ignition enters the coal dust of center guide, the heat that the coal dust of center guide internal combustion discharges refires the coal dust that enters outer guide, the pulverized coal flame of the outer guide internal combustion remaining coal dust in airduct that ignites again; When burner used as main burner, plasma generator (or little oil gun) quit work, and deep or light separation bar is advanced into position about the guide front end 100mm of center through YE action.Its operating sequence is: the actuator action of at first deep or light separation bar, deep or light rod is return in the guide, the open plasma generator produces plasma flame (or little oil gun produces flame), sends into the primary wind and powder mixture, by the temperature of wall temperature thermocouple measurement central tube; Treat flameholding, when boiler reaches certain load, close plasma generator or little oil gun, deep or light separation bar is advanced into the airduct straight section one time through actuator.
Good effect of the present invention, in the time of plasma generator (or little oil gun) work, deep or light separation bar is return the separation bar guide, the primary wind and powder mixture is behind an airduct elbow, effect by deep or light guide ring, the wind powder mixture of concentrated phase enters the center guide, by plasma (or little oil gun) flame ignition; The shelves stream piece of plasma generator port front portion plays the effect of protection plasma (or little oil gun) flame, makes that the degree of filling of plasma (or little oil gun) flame is higher, and it is big that the contact area of flame and coal dust becomes, and is beneficial to igniting of coal dust; Other coal dust is lighted successively in outer subsequently guide and the airduct, has realized the effect that coal dust is lighted step by step, flame amplifies step by step.When plasma generator (or little oil gun) is idle, deep or light separation bar is advanced to the distance of distance center guide 100mm, make that the primary wind and powder mixture obtains at deep or light separation bar place separating, dense phase pulverized coal sprays into burner hearth along the outer circumference of an airduct through spout, light phase coal dust then sprays into burner hearth by the nearly center of an airduct, make distribution of particles and original burner consistent of burner inside, do not change in the burner and characteristics such as Temperature Distribution that spout is outer, combustion zone distribution.In addition, the diverse location at the center of burner guide is furnished with thermocouple, carries out the monitoring of wall temperature temperature.
The present invention compares with existing coal burner, has the following advantages:
1. deep or light separation bar is when plasma generator or little oil gun put into operation, can not influence dense phase pulverized coal by flame ignition, when generator was stopped using, the pulverized coal particle of original burner of having reduced distributed, to distribute to burner flow field, temperature field, the Effect on Performance of boiler drops to minimum.The low NOx that has kept former burner, outer dense interior light burning feature and mode.
2. shelves stream piece can form the recirculating zone of low velocity at the link stopper rear portion, plays the effect of protection plasma flame or little oil gun flame, avoids a wind to bend flame, washes away wall, causes coking or scaling loss; Simultaneously also avoid flame adherent, made the surface area of coal dust contact flame reduce, be unfavorable for lighting of coal dust.
3. plasma generator adopts the mode that horizontal radial inserts, compare the mode of axial insertion, the length of plasma generator obviously reduces, so the heat loss of generator obviously reduces, the coal dust amount that plasma flame can be lighted increases, and is beneficial to fully catching fire, burning of coal dust.
The present invention is further illustrated below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the organigram of analysing and observe of the present invention.
Fig. 2 analyses and observe organigram for looking up of Fig. 1.The igniter part is shown.
Among the figure: 1. separation bar guide, 2. concentration separation bar, 3. baffle piece, 4. gripper shoe, 5. outer guide, 6. airduct, 7. center guide, the 8. deep or light eseparation ring in center, 9. windbend pipe, 10. deep or light eseparation rings before igniter, 11. thermocouples, 12. flow distribution plates, 13..
The specific embodiment
Embodiment as shown in Figure 1, 2, a kind of vortex burner, in windbend pipe 9 and airduct 6, center guide 7, gripper shoe 4, outer guide 5 and the igniter 10 (plasma generator or little oil gun) of deep or light eseparation ring 13, the deep or light eseparation ring 8 in front end band center before comprising.Preceding deep or light eseparation ring 13 places the airduct elbow one time, and center guide 7 connects outer guide 5 by gripper shoe 4.Igniter 10 telescopicallies radially are arranged in the center guide 7 of front end of an airduct.An airduct elbow separation bar guide 1 is set also axially, at separation bar guide 1 and center guide 7 front ends telescopic concentration separation bar 2 is set also, concentration separation bar 2 can be shunk back to separation bar guide 1 inside by actuator.In igniter 10 port front portions baffle piece 3 is set also.The head of described concentration separation bar 2 is protruding.Described deep or light eseparation ring is that the cross section is leg-of-mutton annulus or semicircular ring.In order to monitor the burner temperature, thermocouple 11 is installed on the diverse location of center guide 7 respectively.In a windbend pipe 9, also be provided with flow distribution plate 12.When burner used as main burner, plasma generator (or little oil gun) quit work, and deep or light separation bar is advanced into position about the guide front end 100mm of center through actuator action.
Claims (8)
1. vortex burner, in windbend pipe and airduct, center guide, gripper shoe, outer guide and the igniter of deep or light eseparation ring, the deep or light eseparation ring in front end band center before comprising; Preceding deep or light eseparation ring places the airduct elbow one time, and the center guide connects outer guide by gripper shoe; It is characterized in that: the igniter telescopically radially is arranged in the center guide of front end of an airduct; An airduct elbow separation bar guide is set also axially, telescopic concentration separation bar also is set at separation bar guide and center guide front end.
2. vortex burner according to claim 1 is characterized in that: in igniter port front portion the baffle piece is set also.
3. vortex burner according to claim 1 and 2 is characterized in that: the head of described concentration separation bar is protruding.
4. vortex burner according to claim 1 and 2 is characterized in that: described deep or light eseparation ring is that the cross section is leg-of-mutton annulus.
5. vortex burner according to claim 1 and 2 is characterized in that: described deep or light eseparation ring is that the cross section is leg-of-mutton semicircular ring.
6. vortex burner according to claim 1 and 2 is characterized in that: the diverse location that thermocouple is installed on the center guide respectively is set.
7. vortex burner according to claim 1 and 2 is characterized in that: also be provided with flow distribution plate in the described windbend pipe.
8. vortex burner according to claim 1 and 2 is characterized in that: describedly use as main burner when burner, when igniter quit work, deep or light separation bar was advanced into position about the guide front end 100mm of center through the actuator action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100773298A CN100549519C (en) | 2007-09-25 | 2007-09-25 | A kind of vortex burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100773298A CN100549519C (en) | 2007-09-25 | 2007-09-25 | A kind of vortex burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101140065A true CN101140065A (en) | 2008-03-12 |
| CN100549519C CN100549519C (en) | 2009-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100773298A Active CN100549519C (en) | 2007-09-25 | 2007-09-25 | A kind of vortex burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100549519C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226520A (en) * | 2011-04-25 | 2011-10-26 | 哈尔滨工业大学 | Combustion device and method for directly igniting vertical shade pulverized coal airflow |
| CN103277793A (en) * | 2013-05-27 | 2013-09-04 | 杨占春 | Thick and thin separation rotational flow pulverized coal burner |
| CN103868068A (en) * | 2014-03-24 | 2014-06-18 | 王龙陵 | High temperature oxygen direct ignition and combustion stabilization system |
| CN104100971A (en) * | 2014-07-07 | 2014-10-15 | 清华大学 | Cyclone burner with primary air concentration separation function |
| US8991323B2 (en) | 2008-11-14 | 2015-03-31 | Babcock & Wilcox Power Generation Group, Inc. | Bladed coal diffuser and coal line balancing device |
| JP2015197263A (en) * | 2014-04-02 | 2015-11-09 | 株式会社Ihi | Pulverized-coal burner |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031957C (en) * | 1992-03-07 | 1996-06-05 | 山东省电力试验研究所 | Coal powder burner |
| CN1079524C (en) * | 1995-11-24 | 2002-02-20 | 浙江大学 | Controllable gradation separating spiral-flow powdered coal burning method and device |
| JP3344694B2 (en) * | 1997-07-24 | 2002-11-11 | 株式会社日立製作所 | Pulverized coal combustion burner |
| CN2338615Y (en) * | 1998-07-17 | 1999-09-15 | 武汉水利电力大学 | Vortex coal powder burner with centrifugal thick/thin separation |
| CN1400420A (en) * | 2002-09-09 | 2003-03-05 | 国电热工研究院 | Double-stepping fuel combustion method and its double-stepping cyclone burner |
-
2007
- 2007-09-25 CN CNB2007100773298A patent/CN100549519C/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8991323B2 (en) | 2008-11-14 | 2015-03-31 | Babcock & Wilcox Power Generation Group, Inc. | Bladed coal diffuser and coal line balancing device |
| CN102226520A (en) * | 2011-04-25 | 2011-10-26 | 哈尔滨工业大学 | Combustion device and method for directly igniting vertical shade pulverized coal airflow |
| CN102226520B (en) * | 2011-04-25 | 2013-04-10 | 哈尔滨工业大学 | Combustion device and method for directly igniting vertical shade pulverized coal airflow |
| CN103277793A (en) * | 2013-05-27 | 2013-09-04 | 杨占春 | Thick and thin separation rotational flow pulverized coal burner |
| CN103277793B (en) * | 2013-05-27 | 2015-07-01 | 杨占春 | Thick and thin separation rotational flow pulverized coal burner |
| CN103868068A (en) * | 2014-03-24 | 2014-06-18 | 王龙陵 | High temperature oxygen direct ignition and combustion stabilization system |
| CN103868068B (en) * | 2014-03-24 | 2016-03-02 | 王龙陵 | A kind of high-temperature oxygen direct-fire and surely fire system |
| JP2015197263A (en) * | 2014-04-02 | 2015-11-09 | 株式会社Ihi | Pulverized-coal burner |
| CN104100971A (en) * | 2014-07-07 | 2014-10-15 | 清华大学 | Cyclone burner with primary air concentration separation function |
| CN104100971B (en) * | 2014-07-07 | 2016-07-20 | 清华大学 | A kind of turbulent burner of First air air-coal separating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100549519C (en) | 2009-10-14 |
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Address after: Shenzhen high tech Industrial Park in Guangdong province 518057 Gao Xin Road Fiyta Technology Building Room 1106 Co-patentee after: DONGFANG BOILER GROUP Co.,Ltd. Patentee after: Shenzhen Dongfang Boiler Control Co.,Ltd. Address before: Shenzhen high tech Industrial Park in Guangdong province 518057 Gao Xin Road Fiyta Technology Building Room 1106 Co-patentee before: DONGFANG BOILER GROUP Co.,Ltd. Patentee before: Shenzhen Dongfang Boiler Control Co.,Ltd. |
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| CP03 | Change of name, title or address |
Address after: 1006, Feiyada Technology Building, No. 002 Gaoxin South 1st Road, Gaoxin Community, Yuehai Street, Nanshan District, Shenzhen City, Guangdong Province, 518000 Patentee after: Dongfang Electric Qineng (Shenzhen) Technology Co.,Ltd. Patentee after: DONGFANG BOILER GROUP Co.,Ltd. Address before: Shenzhen high tech Industrial Park in Guangdong province 518057 Gao Xin Road Fiyta Technology Building Room 1106 Patentee before: Shenzhen Dongfang Boiler Control Co.,Ltd. Patentee before: DONGFANG BOILER GROUP Co.,Ltd. |
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| CP03 | Change of name, title or address |