CN203980270U - The adjustable coal burner nozzle of a kind of bluff body - Google Patents
The adjustable coal burner nozzle of a kind of bluff body Download PDFInfo
- Publication number
- CN203980270U CN203980270U CN201420358905.1U CN201420358905U CN203980270U CN 203980270 U CN203980270 U CN 203980270U CN 201420358905 U CN201420358905 U CN 201420358905U CN 203980270 U CN203980270 U CN 203980270U
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- CN
- China
- Prior art keywords
- bluff body
- nozzle
- coal burner
- telescopic shaft
- burner nozzle
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Abstract
The adjustable coal burner nozzle of a kind of bluff body, is made up of nozzle inside casing, nozzle housing, bluff body sheet, bluff body telescopic shaft, bluff body back shaft, bluff body connecting axle and retractor device.By regulating bluff body, regulate ignition time of breeze airflow, avoid catching fire too early, make burner nozzle because of overheated be burned and spout near slagging scorification.Too late the making of avoiding catching fire moved on flame kernel, increases the incomplete combustion loss of boiler solid, reduces the efficiency of combustion of boiler, causes the convection heating surface slagging scorification at furnace outlet place.The adjustable coal burner nozzle of a kind of bluff body that the utility model provides, it can regulate the size and shape of bluff body to ensure catching fire in time and smooth combustion of coal dust according to the variation of the variation of coal or load, boiler can be safely and steadily run, efficiency of combustion can be guaranteed, control the generation of NOx simultaneously, strengthened the adaptive capacity of boiler to coal and load variations.
Description
Technical field
The utility model relates to the adjustable coal burner nozzle of a kind of bluff body, belongs to combustion apparatus field.
Background technology
When boiler operatiopn, for different combustion conditions, wish that breeze airflow can catch fire in time near burner nozzle.If caught fire too early or catch fire too lately, security and economy to boiler exert an influence.
So coal burner nozzle is the key of coal powder ignition and smooth combustion, especially for the low volatile such as anthracite, meager coal coal, catching fire of coal dust is most important with safe operation and the efficiency of combustion of smooth combustion to boiler.In current domestic and international technology, be directed to wind DC burner one time, mostly at the front end of coal burner nozzle, various forms of bluff bodies are set, make a wind form stable recirculating zone in bluff body front, entrainment furnace high-temperature flue gas, make pulverized coal particle be heated to rapidly ignition temperature, play the effect of catching fire in time with smooth combustion.But, wind nozzle operating mode of living in is more severe due to one time, the very high and serious wear of temperature, in current technology, nozzle is mostly that the steel alloy of heat resistant and wear resistant forms by monoblock cast, and the bluff body arranging in nozzle is all made of one with nozzle, be in operation and can not do any adjusting, when design coal with actually use coal gap when larger or when load variations causes that primary air flow changes, can cause coal dust not catch fire timely and smooth combustion, make the boiler can not safety and economic operation.In addition, because a general mood stream is Dual-Phrase Distribution of Gas olid at a high speed, inhomogeneous the washing away of pulverized coal particle causes bluff body concentrated wear seriously even to make bluff body grind off, cause nozzle can not play due effect, and nozzle and bluff body are one, need to change whole nozzle, cause waste economically.Moreover because nozzle and bluff body are one, thermal stress at high temperature easily makes nozzle produce gross distortion.
Therefore, be badly in need of a kind of bluff body adjustable and maintenance easy accessibility coal burner nozzle to adapt to the variation of boiler load and the diversity of coal.
Summary of the invention
The utility model object is to provide a kind of bluff body adjustable coal burner nozzle, it can regulate size and the shape of bluff body to ensure catching fire in time and smooth combustion of coal dust according to the variation of the variation of coal or load, boiler can be safely and steadily run, efficiency of combustion can be guaranteed, and controls the generation of NOx simultaneously.
In order to achieve the above object, the adjustable coal burner nozzle of a kind of bluff body that the technical solution of the utility model provides, is characterized in that: coal burner nozzle is made up of nozzle frame, bluff body sheet, bluff body telescopic shaft, bluff body back shaft, bluff body sheet connecting axle and retractor device.Coal burner nozzle is fixed on case shell or an airduct by nozzle frame.Nozzle frame consists of link of boards nozzle inside casing and nozzle housing, the left and right sides or upper and lower both sides in nozzle inside casing front portion have circular hole, be used for installing bluff body back shaft, the left and right sides or upper and lower both sides at nozzle inside casing rear portion have slotted hole, be used for installing bluff body telescopic shaft, two bluff body sheets that length does not wait are rotationally connected integral by bluff body connecting axle, one end is rotated and is fixed on bluff body back shaft, the other end rotates and is fixed on bluff body telescopic shaft, telescopic shaft two ends are connected in retractor device, pull bluff body telescopic shaft to move forward and backward taking the slotted hole on nozzle inside casing as guide rail by retractor device, moving forward and backward of telescopic shaft drives bluff body sheet to move, because bluff body sheet one end is fixed on bluff body sheet back shaft, bluff body sheet forms different bluff body forms in the situation that of one-sided movement, when telescopic shaft moves forward, bluff body sheet forms V-type bluff body, when telescopic shaft mediates, bluff body sheet forms triangle bluff body
,when telescopic shaft moves backward, bluff body sheet forms rhombus bluff body.Thereby pull bluff body telescopic shaft to move forward and backward to realize size and the shape of bluff body adjustable by retractor device.
Bluff body can horizontal positioned or is vertically placed in spout, but no matter bluff body is horizontal positioned or vertically places, bluff body can or be organized bluff body sheet more and forms by one group, distance between every group of bluff body sheet and between bluff body sheet and nozzle frame is 1-3mm, to ensure installing/dismounting and absorbing thermal expansion, bluff body sheet length sum adds that gap sum should equal the length of nozzle inside casing.Because both sides bluff body sheet can be identical or different, in the time that both sides bluff body sheet is symmetrical, the plane that telescopic shaft and bolster form is the bluff body plane of symmetry, the bluff body forming is symmetrical bluff body, in the time that both sides bluff body sheet is asymmetric, the plane that telescopic shaft and bolster form is asymmetric faces, and the bluff body forming is asymmetric bluff body.
Preferably, the angle of described every side bluff body sheet and telescopic shaft and plane that bolster forms is 5 ~ 25 °.
Preferably, the angle that described every group of bluff body sheet forms is 10 ~ 30 °.
Preferably, the group number of described bluff body sheet is at least one group.
Preferably, described bluff body sheet layout can be horizontally disposed in coal dust spout.
Preferably, described bluff body sheet is arranged and can be vertically arranged in coal dust spout.
Preferably, described same group of bluff body sheet both sides are symmetrical.
Preferably, described same group of bluff body sheet both sides are asymmetric.
The adjustable coal burner nozzle of a kind of bluff body that the utility model provides, has following beneficial effect.
(1) by regulating bluff body, regulate the ignition time of breeze airflow, avoid catching fire too early, burner nozzle is burned because of overheated, make near the slagging scorification of spout.Avoid catching fire too late, whole combustion process is postponed, and causes coal dust to have little time to burn down and just leaves burner hearth, increases solid incomplete combustion loss, reduces the efficiency of combustion of boiler.Too late the making of avoiding catching fire moved on flame kernel, causes the convection heating surface slagging scorification at furnace outlet place.Strengthen the adaptability of boiler to coal and load.
(2) because bluff body is made up of some groups of bluff body sheets, wash away and cause bluff body concentrated wear and seriously even make bluff body grind off when pulverized coal particle inhomogeneous, cause nozzle can not play the due used time of doing, do not need whole nozzle to change, only need to change the bluff body sheet of wearing and tearing, avoided whole nozzle to change cause waste economically.
(3) because bluff body is made up of some groups of bluff body sheets, between bluff body and nozzle, there is certain space, avoided under high-temperature condition between casting nozzle bluff body and nozzle frame deformed damaged under the effect of thermal stress.
The adjustable coal burner nozzle of a kind of bluff body that the utility model provides, it can regulate the size and shape of bluff body to ensure catching fire in time and smooth combustion of coal dust according to the variation of the variation of coal or load, boiler can be safely and steadily run, efficiency of combustion can be guaranteed, and controls the generation of NOx simultaneously.
Brief description of the drawings
Fig. 1 is the adjustable coal burner nozzle of a kind of bluff body.
Fig. 2 is that telescopic shaft moves forward formation V-type bluff body cutaway view.
Fig. 3 is that telescopic shaft mediates and forms triangle bluff body cutaway view.
Fig. 4 is the telescopic shaft mobile rhombus bluff body cutaway view that forms backward.
description of reference numerals
1----nozzle inside casing, 2----nozzle housing, 3----bluff body sheet, 4----bluff body telescopic shaft, 5----bluff body back shaft,
6----bluff body connecting axle, 7----gusset, the bluff body angle that α----both sides bluff body sheet forms.
Detailed description of the invention
For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
embodiment: the adjustable coal burner nozzle of a kind of bluff body.
Fig. 1 is the horizontally disposed and adjustable coal burner nozzle of a kind of bluff body, Fig. 2 is that telescopic shaft moves forward formation V-type bluff body cutaway view, Fig. 3 is that telescopic shaft mediates and forms triangle bluff body cutaway view, Fig. 4 is the telescopic shaft mobile rhombus bluff body cutaway view that forms backward, the adjustable coal burner nozzle of a kind of bluff body that the utility model provides, it is characterized in that: coal burner nozzle is by nozzle inside casing (1), nozzle housing (2), bluff body sheet (3), bluff body telescopic shaft (4), bluff body back shaft (5), bluff body connecting axle (6) and retractor device composition.Connect to form nozzle frame by nozzle inside casing (1) and nozzle housing (2) by gusset (7), the left and right sides or upper and lower both sides in nozzle inside casing (1) front portion have circular hole, be used for installing bluff body back shaft (5), the left and right sides or upper and lower both sides at nozzle inside casing (1) rear portion have slotted hole, be used for installing bluff body telescopic shaft (4), two bluff body sheets (3) that length does not wait are rotationally connected integral by bluff body connecting axle (6), one end is rotated and is fixed on bluff body back shaft (5), the other end rotates and is fixed on bluff body telescopic shaft (4), telescopic shaft (4) two ends are connected in retractor device, pull bluff body telescopic shaft (4) to move forward and backward taking the slotted hole on nozzle inside casing (1) as guide rail by retractor device, moving forward and backward of telescopic shaft (4) drives bluff body sheet (3) mobile, because bluff body sheet (3) one end is fixed on bluff body sheet back shaft (5), upper and lower sides bluff body sheet (3) forms different bluff body forms in the situation that of one-sided movement, when telescopic shaft (4) moves forward, upper and lower sides bluff body sheet (3) forms V-type bluff body (as Fig. 2), when telescopic shaft (4) mediates, upper and lower sides bluff body sheet (3) forms triangle bluff body (as Fig. 3), when telescopic shaft (4) moves backward, upper and lower sides bluff body sheet (3) forms rhombus bluff body (as Fig. 4).Thereby pull bluff body telescopic shaft to move forward and backward to realize size and the shape of bluff body adjustable by retractor device.
In bluff body horizontal positioned spout, bluff body is made up of four groups of bluff body sheets, distance between every group of bluff body sheet and between bluff body sheet and nozzle frame is 2mm, and to ensure installing/dismounting and absorbing thermal expansion, bluff body sheet length sum adds that gap sum equals the length of nozzle inside casing.
Claims (10)
1. the adjustable coal burner nozzle of bluff body, is characterized in that: coal burner nozzle is made up of nozzle inside casing (1), nozzle housing (2), bluff body sheet (3), bluff body telescopic shaft (4), bluff body back shaft (5), bluff body connecting axle (6) and retractor device, connect to form nozzle frame by nozzle inside casing (1) and nozzle housing (2) by gusset (7), the left and right sides or upper and lower both sides in nozzle inside casing (1) front portion have circular hole, be used for installing bluff body back shaft (5), the left and right sides or upper and lower both sides at nozzle inside casing (1) rear portion have slotted hole, be used for installing bluff body telescopic shaft (4), two bluff body sheets (3) that length does not wait are rotationally connected integral by bluff body connecting axle (6), one end is rotated and is fixed on bluff body back shaft (5), the other end rotates and is fixed on bluff body telescopic shaft (4), bluff body telescopic shaft (4) two ends are connected in retractor device, pull bluff body telescopic shaft (4) to move forward and backward taking the slotted hole on nozzle inside casing (1) as guide rail by retractor device, moving forward and backward of telescopic shaft (4) drives bluff body sheet (3) mobile, because bluff body sheet (3) one end is fixed on bluff body back shaft (5), both sides bluff body sheets (3) form different bluff body forms in the situation that of one-sided movement, when telescopic shaft (4) moves forward, both sides bluff body sheets (3) form V-type bluff body, when telescopic shaft (4) mediates, both sides bluff body sheets (3) form triangle bluff body, when telescopic shaft (4) moves backward, both sides bluff body sheets (3) form rhombus bluff body.
2. the adjustable coal burner nozzle of a kind of bluff body as claimed in claim 1, is characterized in that: the distance between described bluff body sheet (3) and bluff body sheet (3) and between bluff body sheet (3) and nozzle inside casing (1) is 1-3mm.
3. the adjustable coal burner nozzle of a kind of bluff body as claimed in claim 1, is characterized in that: described bluff body sheet (3) length sum adds that gap sum should equal the width of nozzle inside casing (1).
4. the adjustable coal burner nozzle of a kind of bluff body as claimed in claim 1, is characterized in that: described bluff body sheet (3) is 5 ~ 25 ° with the angle of bluff body telescopic shaft (4) and bluff body back shaft (5) plane that forms.
5. the adjustable coal burner nozzle of a kind of bluff body as claimed in claim 1, is characterized in that: the bluff body angle that described bluff body sheet (3) forms is 10 ~ 30 °.
6. the adjustable coal burner nozzle of a kind of bluff body as claimed in claim 1, is characterized in that: the group number of described bluff body sheet (3) is at least one group.
7. the adjustable coal burner nozzle of a kind of bluff body as claimed in claim 1, is characterized in that: described bluff body sheet (3) is horizontally disposed in coal dust spout.
8. the adjustable coal burner nozzle of a kind of bluff body as claimed in claim 1, is characterized in that: described bluff body sheet (3) is vertically arranged in coal dust spout.
9. the adjustable coal burner nozzle of a kind of bluff body as claimed in claim 1, is characterized in that: described both sides bluff body sheets (3) are symmetrical.
10. the adjustable coal burner nozzle of a kind of bluff body as claimed in claim 1, is characterized in that: described both sides bluff body sheets (3) are asymmetric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420358905.1U CN203980270U (en) | 2014-07-01 | 2014-07-01 | The adjustable coal burner nozzle of a kind of bluff body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420358905.1U CN203980270U (en) | 2014-07-01 | 2014-07-01 | The adjustable coal burner nozzle of a kind of bluff body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203980270U true CN203980270U (en) | 2014-12-03 |
Family
ID=51977704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420358905.1U Expired - Fee Related CN203980270U (en) | 2014-07-01 | 2014-07-01 | The adjustable coal burner nozzle of a kind of bluff body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203980270U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185875A (en) * | 2018-08-26 | 2019-01-11 | 苏州上春仪监测程控设备制造有限公司 | A kind of boiler-burner silicon carbide nozzle |
| US10253977B2 (en) | 2016-03-08 | 2019-04-09 | Honeywell International Inc. | Gaseous fuel-air burner having a bluff body flame stabilizer |
| CN110465415A (en) * | 2019-09-16 | 2019-11-19 | 上海锅炉厂有限公司 | A kind of telescopic air-flow spout and its design implement method |
| CN113339788A (en) * | 2021-06-10 | 2021-09-03 | 国家电网有限公司 | Pulverized coal burner nozzle device suitable for stable combustion of boiler |
| CN113623642A (en) * | 2021-07-08 | 2021-11-09 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Wide-adaptability combustion system of boiler with tangential circles at four corners |
-
2014
- 2014-07-01 CN CN201420358905.1U patent/CN203980270U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10253977B2 (en) | 2016-03-08 | 2019-04-09 | Honeywell International Inc. | Gaseous fuel-air burner having a bluff body flame stabilizer |
| CN109185875A (en) * | 2018-08-26 | 2019-01-11 | 苏州上春仪监测程控设备制造有限公司 | A kind of boiler-burner silicon carbide nozzle |
| CN110465415A (en) * | 2019-09-16 | 2019-11-19 | 上海锅炉厂有限公司 | A kind of telescopic air-flow spout and its design implement method |
| CN113339788A (en) * | 2021-06-10 | 2021-09-03 | 国家电网有限公司 | Pulverized coal burner nozzle device suitable for stable combustion of boiler |
| CN113623642A (en) * | 2021-07-08 | 2021-11-09 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Wide-adaptability combustion system of boiler with tangential circles at four corners |
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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: 20141203 Termination date: 20170701 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |