CN201302156Y - External combustion type pulverized coal burner which has the characteristics of tiny-oil ignition and ultra-low load stable combustion - Google Patents
External combustion type pulverized coal burner which has the characteristics of tiny-oil ignition and ultra-low load stable combustion Download PDFInfo
- Publication number
- CN201302156Y CN201302156Y CNU200820167605XU CN200820167605U CN201302156Y CN 201302156 Y CN201302156 Y CN 201302156Y CN U200820167605X U CNU200820167605X U CN U200820167605XU CN 200820167605 U CN200820167605 U CN 200820167605U CN 201302156 Y CN201302156 Y CN 201302156Y
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- China
- Prior art keywords
- pulverized coal
- bluff body
- ultra
- low load
- tiny
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- Expired - Lifetime
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- 239000003245 coal Substances 0.000 title claims abstract description 26
- 238000002485 combustion reaction Methods 0.000 title abstract description 6
- 238000010304 firing Methods 0.000 claims description 10
- 238000005192 partition Methods 0.000 abstract 3
- 230000003134 recirculating effect Effects 0.000 description 7
- 239000002817 coal dust Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000002381 plasma Anatomy 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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Abstract
The utility model discloses an external combustion type pulverized coal burner which has the characteristics of tiny-oil ignition and ultra-low load stable combustion. The pulverized coal burner comprises a diverging combustor body, a perimeter air casing, partition boards, a primary air pipe, a central air pipe, a thermocouple, a micro-oil gun and a high energy lighter. A bluff body is utilized to realize the concentration of pulverized coal airflow; the concentrated pulverized coal airflow is further concentrated when passing through the triangular groove of the bluff body; the partition boards are adopted to separate the concentrated pulverized coal airflow and the pulverized coal main flow; and recirculation zones with high-concentration pulverized coal are formed near the partition boards, so as to realize ultra-low load stable combustion and various coal adaptability. Under the conditions of cold draft and cold furnace, the micro-oil gun can be used to ignite the pulverized coal airflow to realize temperature and pressure increase; wall temperature is utilized to monitor the position of an ignition point; and the central air amount and the perimeter air amount are utilized to adjust the position of the ignition point, thereby satisfying requirements of a boiler in different stages.
Description
Technical field
The utility model relates to a kind of coal burner, particularly relates to a kind of external-burning tiny-oil ignition and ultra-low load steady-burning coal power combustor.
Background technology
In the pulverized coal boiler ignition field, occur much such as coal burners such as little oil, plasmas, its common ground is to utilize localized hyperthermia's incendiary source, at burner internal classification firing coal-dust airflow, reaches igniting fuel-economizing purpose.Because high temperature dot is positioned at burner inside, increased the burner resistance on the one hand, cause the slagging scorification scaling loss on the other hand easily.This type of burner and main burner exist on structure function than big-difference, do not possess underload ability and coal adaptability under the condition of the auxiliary igniting source that do not come into operation.
Summary of the invention
In order to solve the problem that exists in the background technology, the purpose of this utility model is to provide a kind of external-burning tiny-oil ignition and ultra-low load steady-burning coal power combustor, and its high temperature dot that catches fire is positioned at burner outlet.
The technical scheme that its technical problem that solves the utility model adopts is:
The utility model comprises airduct, central air hose, little oil gun, high-energy firing gun, thermocouple, gradually expanded form burner body, bluff body, surrounding air housing and dividing plate one time; The surrounding air housing is enclosed within gradually expanded form burner body outside, be connected with gusset, the small end of gradually expanded form burner body links to each other with an airduct, gradually expanded form burner body internal placement bluff body, big end two outside symmetries of bluff body are equipped with dividing plate, the big end of bluff body top and bottom are respectively equipped with a plurality of vee gutters, a plurality of vee gutters extend to the bluff body small end, bluff body inside is air port, rectangular center, the bluff body small end links to each other with the central air hose of an airduct, form two breeze airflow passages up and down between central air hose and an airduct, on both sides, the gradually expanded form burner body outside thermocouple is set respectively, little oil gun and high-energy firing gun be arranged in parallel in central air hose and air port, center.
Described surrounding air housing end face and gradually expanded form burner body large end face axial distance C are 80～120mm.
End face of described dividing plate and the big end of bluff body at grade, another end face of dividing plate and surrounding air housing end face distance B are 130～170mm.
Described bluff body large end face and surrounding air housing end face distance A are 230～270mm.
The useful effect that the utlity model has is:
Utilize bluff body to realize concentrating of breeze airflow, breeze airflow after concentrating obtains further concentrating through the vee gutter on the bluff body time, dividing plate is isolated breeze airflow after concentrating and coal dust main flow, near two dividing plates, form recirculating zone with high concentration pulverized coal, realize ultra-low load steady combustion and wide coal adaptability, under cold wind black furnace condition, available little oil gun firing coal-dust airflow, realize increasing temperature and pressure, utilize wall temperature monitoring ignition point position, utilize center wind and circumference air quantity to regulate ignition point position, satisfy the requirement of boiler different phase.
Description of drawings
Fig. 1 is a structural principle schematic diagram of the present utility model.
Fig. 2 is the A-A cutaway view of Fig. 1.
Among the figure: 1, airduct, 2, central air hose, 3, little oil gun, 4, high-energy firing gun, 5, thermocouple, 6, the gradually expanded form burner body, 7, bluff body, 8, the surrounding air housing, 9, gusset, 10, dividing plate, 11, vee gutter, 12, the air port, center.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1 and Figure 2, the utility model comprises airduct 1, central air hose 2, little oil gun 3, high-energy firing gun 4, thermocouple 5, gradually expanded form burner body 6, bluff body 7, surrounding air housing 8 and dividing plate 10 one time; Surrounding air housing 8 is enclosed within gradually expanded form burner body 6 outsides, be connected with eight gussets 9, the small end of gradually expanded form burner body 6 links to each other with an airduct 1, gradually expanded form burner body 6 internal placement bluff bodies 7, bluff body 7 big end two outside symmetries are equipped with dividing plate 10, bluff body 7 big end top and bottom are respectively equipped with a plurality of vee gutters 11, a plurality of vee gutters 11 extend to bluff body 7 small ends, bluff body 7 inside are air port, rectangular center 12, bluff body 7 small ends link to each other with the central air hose 2 of an airduct 1, form two breeze airflow passages up and down between central air hose 2 and an airduct 1, on both sides, gradually expanded form burner body 6 outside thermocouple 5 is set respectively, little oil gun 3 and high-energy firing gun 4 be arranged in parallel in central air hose 2 and air port, center 12.Bluff body 7 right sides and surrounding air housing 8 right sides form the precombustion chamber space.
Described surrounding air housing 8 end faces and gradually expanded form burner body 6 large end face axial distance C are 80～120mm.
10 1 end faces of described dividing plate and bluff body 7 big ends at grade, another end face of dividing plate 10 and surrounding air housing 8 end face distance B are 130～170mm.
Described bluff body 7 large end faces and surrounding air housing 8 end face distance A are 230～270mm.
The course of work of the present utility model is as follows:
In ignition of the boiler, increasing temperature and pressure and underload process, close surrounding air and center wind, because the acting in conjunction of bluff body 7 and two dividing plates 10 forms roomy recirculating zone between bluff body 7 and two dividing plates 10, have good ignition condition.The breeze airflow airduct 1 of flowing through arrives bluff body 7, concentrated in bluff body 7 upper and lower surfaces, a part of coal dust air-flow after concentrating obtains further localized concentrations through the vee gutter 11 on the bluff body 7 time, and enter in the recirculating zone between bluff body 7 and two dividing plates 10, bluff body 7 big end both sides sectional areas are less than the centre, make that bluff body 7 recirculating zones are partially enclosed, at this moment, utilize high-energy firing gun 4 to light the diesel oil of little oil gun 3 ejections, just can under cold wind black furnace condition, light high concentration pulverized coal air-flow in the recirculating zone, reflux area length is apart from bluff body 7 big end 400～500mm generally speaking, the high concentration pulverized coal rear section that catches fire is in surrounding air housing 8 end face inside in the recirculating zone, and the heat emission is less, can reach very high-temperature, and dividing plate 10 is cooled off by the coal dust main flow, can scaling loss.Along with the carrying out of increasing temperature and pressure, the temperature that thermocouple 5 monitors is more and more higher, can open center wind and surrounding air gradually, progressively eliminates the recirculating zone, makes temperature that thermocouple 5 monitors in OK range.When boiler normally moves, since the variation of coal and load, the variations in temperature that thermocouple 5 is monitored, and by the adjusting of center wind and circumference air quantity, the temperature that thermocouple 5 is monitored remains in the normal range (NR), to satisfy the different requirements of boiler.
The above-mentioned specific embodiment is used for the utility model of explaining; rather than the utility model limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.
Claims (4)
1, a kind of external-burning tiny-oil ignition and ultra-low load steady-burning coal power combustor is characterized in that: comprise an airduct (1), central air hose (2), little oil gun (3), high-energy firing gun (4), thermocouple (5), gradually expanded form burner body (6), bluff body (7), surrounding air housing (8) and dividing plate (10); Surrounding air housing (8) is enclosed within gradually expanded form burner body (6) outside, be connected with gusset (9), the small end of gradually expanded form burner body (6) links to each other with an airduct (1), gradually expanded form burner body (6) internal placement bluff body (7), bluff body (7) holds two outside symmetries that dividing plate (10) is housed greatly, bluff body (7) holds top and bottom to be respectively equipped with a plurality of vee gutters (11) greatly, a plurality of vee gutters (11) extend to bluff body (7) small end, bluff body (7) inside is air port, rectangular center (12), bluff body (7) small end links to each other with the central air hose (2) of an airduct (1), form two breeze airflow passages up and down between a central air hose (2) and the airduct (1), on both sides, gradually expanded form burner body (6) outside thermocouple (5) is set respectively, little oil gun (3) and high-energy firing gun (4) be arranged in parallel in central air hose (2) and air port, center (12).
2, a kind of external-burning tiny-oil ignition according to claim 1 and ultra-low load steady-burning coal power combustor is characterized in that: described surrounding air housing (8) end face and gradually expanded form burner body (6) large end face axial distance C are 80～120mm.
3, a kind of external-burning tiny-oil ignition according to claim 1 and ultra-low load steady-burning coal power combustor, it is characterized in that: (10) end faces of described dividing plate and bluff body (7) are big to be held at grade, and another end face of dividing plate (10) and surrounding air housing (8) end face distance B are 130～170mm.
4, a kind of external-burning tiny-oil ignition according to claim 1 and ultra-low load steady-burning coal power combustor is characterized in that: described bluff body (7) large end face and surrounding air housing (8) end face distance A are 230～270mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820167605XU CN201302156Y (en) | 2008-11-07 | 2008-11-07 | External combustion type pulverized coal burner which has the characteristics of tiny-oil ignition and ultra-low load stable combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820167605XU CN201302156Y (en) | 2008-11-07 | 2008-11-07 | External combustion type pulverized coal burner which has the characteristics of tiny-oil ignition and ultra-low load stable combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201302156Y true CN201302156Y (en) | 2009-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820167605XU Expired - Lifetime CN201302156Y (en) | 2008-11-07 | 2008-11-07 | External combustion type pulverized coal burner which has the characteristics of tiny-oil ignition and ultra-low load stable combustion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201302156Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927568A (en) * | 2012-11-09 | 2013-02-13 | 济南海普电力节能科技有限公司 | Dense-diluted pulverized coal burner with low NOX |
| CN104180369A (en) * | 2014-09-10 | 2014-12-03 | 朱华平 | Pulverized coal spraying nozzle device |
| CN107709881A (en) * | 2015-09-11 | 2018-02-16 | 三菱日立电力系统株式会社 | Burner and the boiler for possessing the burner |
| US10458645B2 (en) | 2015-03-31 | 2019-10-29 | Mitsubishi Hitachi Power Systems, Ltd. | Combustion burner and boiler provided with same |
| US10591154B2 (en) | 2015-03-31 | 2020-03-17 | Mitsubishi Hitachi Power Systems, Ltd. | Combustion burner and boiler |
-
2008
- 2008-11-07 CN CNU200820167605XU patent/CN201302156Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927568A (en) * | 2012-11-09 | 2013-02-13 | 济南海普电力节能科技有限公司 | Dense-diluted pulverized coal burner with low NOX |
| CN104180369A (en) * | 2014-09-10 | 2014-12-03 | 朱华平 | Pulverized coal spraying nozzle device |
| US10458645B2 (en) | 2015-03-31 | 2019-10-29 | Mitsubishi Hitachi Power Systems, Ltd. | Combustion burner and boiler provided with same |
| US10591154B2 (en) | 2015-03-31 | 2020-03-17 | Mitsubishi Hitachi Power Systems, Ltd. | Combustion burner and boiler |
| CN107709881A (en) * | 2015-09-11 | 2018-02-16 | 三菱日立电力系统株式会社 | Burner and the boiler for possessing the burner |
| US10677457B2 (en) | 2015-09-11 | 2020-06-09 | Mitsubishi Hitachi Power Systems, Ltd. | Combustion burner and boiler equipped with the same |
| CN107709881B (en) * | 2015-09-11 | 2021-12-28 | 三菱动力株式会社 | Burner and boiler provided with same |
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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: 20090902 Effective date of abandoning: 20081107 |