CN201191004Y - Air nozzle for side wall of station boiler hearth - Google Patents
Air nozzle for side wall of station boiler hearth Download PDFInfo
- Publication number
- CN201191004Y CN201191004Y CNU2008200631511U CN200820063151U CN201191004Y CN 201191004 Y CN201191004 Y CN 201191004Y CN U2008200631511 U CNU2008200631511 U CN U2008200631511U CN 200820063151 U CN200820063151 U CN 200820063151U CN 201191004 Y CN201191004 Y CN 201191004Y
- Authority
- CN
- China
- Prior art keywords
- jet pipe
- air
- nozzle
- wall
- hearth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000004939 coking Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 abstract description 4
- 239000000779 smoke Substances 0.000 abstract 2
- 238000009792 diffusion process Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000001706 oxygenating effect Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 206010022000 influenza Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Air Supply (AREA)
Abstract
The utility model relates to an air nozzle for fitting the hearth of a power station boiler, which comprises an air input adjusting annular plate, a central nozzle whose nozzle outlet is straight one or ringed one, a second-stage or a third-stage nozzle which is respectively provided with a cyclone generator, an air input adjusting annular plate and a wide-angle horn nozzle. When in use, the airflow provided by the central nozzle has high rigidity, slow diffusion and attenuation and strong penetrating force and can provide oxygen to the middle of the hearth, the strong cyclone airflow provided with the second-stage and the third-stage nozzles have low rigidity and fast attenuation and can flow closely along the wall of the heath, to form an air pad between high temperature smoke and the furnace wall, to reduce the temperature of the high temperature area of the wall, improve the oxygen content in the smoke, and reduce the density of reduction gas and corrosive gas. The air nozzle can effectively prevent the side wall of a hearth from coking and high-temperature corrosion, improve combustion efficiency and prolong service life of the hearth.
Description
Technical field
The utility model belongs to a kind of and the supporting air nozzle of using of station boiler, particularly a kind of be used for the furnace of power-plant boilers side wall not only can oxygenating in stove, but also can effectively prevent the air nozzle of serious coking of side water wall and high temperature corrosion.
Background technology
The large-sized station boiler burner hearth, as 600MW Opposite Firing Boiler burner hearth, " W " flame furnace burner hearth etc., its burner and oxygen supply are with air nozzle (also claim OFA＜after-flame wind〉burner), be arranged on forward and backward wall of burner hearth or the forward and backward chimney arch, any air nozzle and burner all are not set on the burner hearth side wall.And around the burner hearth aspect body of wall (water-cooling wall) thermic load, the high heat load in the average load of both walls water-cooling wall and part all is higher than forward and backward wall or forward and backward wall and chimney arch thereof, be simultaneously high CO concentration near side water wall medial surface zone line and hangs down O
2The concentration district is rendered as tangible reducing atmosphere, causes in this zone coking of body of wall water-cooling wall and high temperature corrosion serious; In addition, above-mentioned burner hearth be located on forward and backward wall or the forward and backward chimney arch OFA (after-flame wind) the after-flame wind (air) that burner provided extremely difficulty satisfy the oxygen supply requirement of burner hearth center, thereby also influenced the efficiency of combustion of boiler.If traditional OFA (after-flame wind) burner is set up in the burner hearth side wall; because its structure mainly is to satisfy axial, depth air-supply; its air stream is for direct current, and is poor to the protectiveness of side wall metope, is difficult to effectively prevent the serious coking and the high temperature corrosion of burner hearth both walls in service central area.
Summary of the invention
The purpose of this utility model is a kind of furnace of power-plant boilers side wall air nozzle of design, reaches and effectively prevents serious coking of burner hearth side water wall in service and high temperature corrosion, and to the oxygenating of burner hearth center, improve its efficiency of combustion, and purpose such as increase the service life.
Solution of the present utility model is to adopt the main body of three grades of jet pipes (runner) of setting with one heart as nozzle, wherein: core jet pipe provides direct current air, in order to improve the oxygenating intensity of burner hearth center, and two, tertiary circulation shape jet pipe provides eddy flow wind, and at its spout portion employing wide-angle horn mouth, make the air of the ejection burner hearth sidewall of trying one's best flow, form a mattress, oxygenating when reducing this side wall zone high heat load state improves O
2Concentration and efficiency of combustion are effectively prevented the serious coking of side water wall and high temperature corrosion are taken place, thereby realize its purpose.Thereby, the utility model comprises the nozzle body that is provided with the pressure air jet pipe, key be nozzle body comprise core jet pipe and with the concentric setting of this core jet pipe two, tertiary circulation shape jet pipe, the spout of core jet pipe is isodiametric straight mouthful or less than the bundle mouth of jet pipe internal diameter with its jet pipe, and two, three grades of nozzle holes are 30 °～60 ° horn mouth and are equipped with the air swirl generator of being with adjusting rod in the annular channels of two jet pipes, and are equipped with the telescopic tolerance adjusting ring flat-plate of regulating the air inflow size at the arrival end of each jet pipe; Two, the three swirler generator be divided in the conical ring cavity in second and third grade jet pipe and respectively slidingtype be placed on main jet pipe and the secondary jet pipe outer wall, each air inflow regulate ring flat-plate then slidingtype be placed on the corresponding core jet pipe and second and third grade jet pipe outer wall.
When the spout of above-mentioned core jet pipe was the bundle mouth, its spout was to centroclinal 20 °～30 ° of jet pipe (that is: the angle of cone in the jet anchor ring and central air hose shaft section is 70 °～60 °).
The utility model provides the high speed direct current air owing to adopt straight mouthful or bundle mouth at the core jet pipe oral area in burner hearth, this part air-flow rigidity is big, diffusive attenuation speed is slow, penetration power is strong, can effectively improve burner hearth central region benefit (confession) oxygen condition in burning later stage; And two, tertiary circulation shape jet pipe adopts the wide-angle horn mouth and strong rotational flow air is provided in burner hearth, its air-flow angle of flare is big, rigidity weak, the rate of decay is fast, and the premix section is short between the main jet pipe air-flow, the strong rotational flow air that is produced sprays into to be pressed close to side wall (water-cooling wall) behind the burner hearth and flows, forms a mattress between high-temperature flue gas and side wall, has both reduced the temperature that acts on side wall high-temperature region flue gas; Obviously improve the oxygen content in the high-temperature flue gas again, formed oxidizing atmosphere, greatly reduced the concentration of reducibility gas and corrosive gas.Thereby can effectively prevent the generation of serious coking of burner hearth side wall and high temperature corrosion phenomenon, the characteristics such as service life that improve efficiency of combustion, prolong side water wall.
Description of drawings
Fig. 1 is the utility model structural representation.
Among the figure: 1. core jet pipe, 2. secondary jet pipe, 3. three grades of jet pipes, 1～1. bundle mouthful, 2～1,3～1. horn mouths, 1～2,2～4,3～4: air inflow is regulated ring flat-plate, 1～3,2～5,3～5: the air inflow adjusting rod, 2～2,3～2: rotational flow generator, 2～3,3～3:(eddy flow takes place) adjusting rod; F
1. core jet pipe air inlet, F
2, F
3: two, three grades of jet pipe air inlets.
The specific embodiment
In the past, back wall face-fired boiler burner hearth and " W " flame boiler furnace were supporting is example with air nozzle:
Nozzle body length overall 3397mm is wherein. core jet pipe 1 long 3259mm, internal diameter of tube body φ 460mm, end bundle mouthful 1～1 internal diameter φ 438mm, bundle mouthful axial long 14mm, wall thickness 5mm; The long 1262mm of secondary jet pipe 2 front end air flues, ring cavity large diameter φ 762mm, the conical ring cavity that cooperates with rotational flow generator 2～2 big (back) end diameter phi 906mm, 19 ° of taperings, 45 ° of horn mouth 2～1 axial long 86mm, taperings, rotational flow generator 2～2 front and back ends external diameters are respectively φ 762mm and 852mm, 19 ° of outer ring surface taperings; Three grades of long 417mm of jet pipe 3 front end air flues, the big footpath of inner chamber φ 887mm, the conical ring cavity rear end diameter phi 1143mm that cooperates with three swirler generator 3～2,17 ° of taperings, 45 ° of front end horn mouth 3～1 axial long 138mm, taperings, three swirler generator front and back ends external diameter are respectively 17 ° of φ 1012mm and 1095mm, outer ring surface taperings; Air quantity regulates ring flat-plate 1～2,2～4 and 3～4 equal slidingtypes are placed on the corresponding jet pipe outer wall also by corresponding air inflow adjusting rod 1～3,2～5 and 3～5 air inflows of regulating each jet pipe.
Claims (2)
1. furnace of power-plant boilers side wall air nozzle, comprise the nozzle body that is provided with the pressure air jet pipe, it is characterized in that nozzle body comprise core jet pipe and with the concentric setting of this core jet pipe two, tertiary circulation shape jet pipe, the spout of core jet pipe is isodiametric straight mouthful or less than the bundle mouth of jet pipe internal diameter with its jet pipe, and two, three grades of nozzle holes are 30 °～60 ° horn mouth and are equipped with the air swirl generator of being with adjusting rod in the annular channels of two jet pipes, and are equipped with the telescopic tolerance adjusting ring flat-plate of regulating the air inflow size at the arrival end of each jet pipe; Two, the three swirler generator be divided in the conical ring cavity in second and third grade jet pipe and respectively slidingtype be placed on main jet pipe and the secondary jet pipe outer wall, each air inflow regulate ring flat-plate then slidingtype be placed on the corresponding core jet pipe and second and third grade jet pipe outer wall.
2. by the described furnace of power-plant boilers side wall of claim 1 air nozzle, the spout that it is characterized in that core jet pipe is when restrainting mouth, centroclinal 20 °～30 ° to jet pipe of its spouts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200631511U CN201191004Y (en) | 2008-04-25 | 2008-04-25 | Air nozzle for side wall of station boiler hearth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200631511U CN201191004Y (en) | 2008-04-25 | 2008-04-25 | Air nozzle for side wall of station boiler hearth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201191004Y true CN201191004Y (en) | 2009-02-04 |
Family
ID=40335166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200631511U Expired - Lifetime CN201191004Y (en) | 2008-04-25 | 2008-04-25 | Air nozzle for side wall of station boiler hearth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201191004Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252338A (en) * | 2011-06-08 | 2011-11-23 | 西安交通大学 | Concentric double-casing strong-turbulence secondary air spray pipe structure |
| CN103148501A (en) * | 2013-03-14 | 2013-06-12 | 福建绿源新能源科技有限公司 | Secondary air structure for boiler burning biomass formed fuel |
| CN104595891A (en) * | 2015-01-21 | 2015-05-06 | 西安热工研究院有限公司 | Opposed firing structure of boiler |
| CN110966590A (en) * | 2019-12-04 | 2020-04-07 | 国网浙江省电力有限公司电力科学研究院 | Primary and secondary air coupling jet system and operation method thereof |
| CN111006232A (en) * | 2019-11-08 | 2020-04-14 | 杭州富尔顿热能设备有限公司 | Balanced flue |
-
2008
- 2008-04-25 CN CNU2008200631511U patent/CN201191004Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252338A (en) * | 2011-06-08 | 2011-11-23 | 西安交通大学 | Concentric double-casing strong-turbulence secondary air spray pipe structure |
| CN103148501A (en) * | 2013-03-14 | 2013-06-12 | 福建绿源新能源科技有限公司 | Secondary air structure for boiler burning biomass formed fuel |
| CN103148501B (en) * | 2013-03-14 | 2015-05-13 | 福建绿源新能源科技有限公司 | Secondary air structure for boiler burning biomass formed fuel |
| CN104595891A (en) * | 2015-01-21 | 2015-05-06 | 西安热工研究院有限公司 | Opposed firing structure of boiler |
| CN111006232A (en) * | 2019-11-08 | 2020-04-14 | 杭州富尔顿热能设备有限公司 | Balanced flue |
| CN110966590A (en) * | 2019-12-04 | 2020-04-07 | 国网浙江省电力有限公司电力科学研究院 | Primary and secondary air coupling jet system and operation method thereof |
| CN110966590B (en) * | 2019-12-04 | 2021-08-03 | 国网浙江省电力有限公司电力科学研究院 | Primary and secondary air coupled jet system and its operation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: DONGFANG ELECTRIC GROUP DONGFANG BOILER GROUP CO., Free format text: FORMER NAME: DONGFANG BOILER (GROUP) CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 643000 Star Street Zigong city of Sichuan Province Huang Jue Ping No. 150 Patentee after: DEC Dongfang Boiler (Group) Co., Ltd. Address before: 643000 Zigong city of Sichuan Province Huang Jueping Wuxing Street Patentee before: Dongfang Boiler (Group) Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090204 |
|
| CX01 | Expiry of patent term |