CN2564873Y - Double step cyclone-burner - Google Patents
Double step cyclone-burner Download PDFInfo
- Publication number
- CN2564873Y CN2564873Y CN 02253094 CN02253094U CN2564873Y CN 2564873 Y CN2564873 Y CN 2564873Y CN 02253094 CN02253094 CN 02253094 CN 02253094 U CN02253094 U CN 02253094U CN 2564873 Y CN2564873 Y CN 2564873Y
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- wind
- secondary air
- burner
- air channel
- deep
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Abstract
The utility model relates to a double-grading cyclone burner. A primary air and powder inlet is connected with a venturi, and a thickness separating pipe is connected with a primary air inflating pipe. An outlet of the venturi and an inlet of the thickness separating pipe are arranged on a central line, and the structure that a primary air passage is communicated with a secondary air passage is formed. The outlet of the venturi and the ingress of the thickness separating pipe are provided with a primary air adjusting ring. An inner secondary air passage is fixed on the outside of the primary air inflating pipe, an outer secondary air passage is fixed on the outside of the inner secondary air passage, and an inner secondary air cyclone baffle and an outer secondary air cyclone baffle are arranged in a secondary air inlet. The burner has the advantages of strong adaptability, excellent NOx control effect, good burning stability, strong ability for low load, simple structure, and convenient manufacture, installation and maintenance.
Description
Affiliated technical field
The utility model belongs to the power plant boiler burner, is specifically related to a kind of pair of classification turbulent burner.
Background technology
Coal burner is the main parts of coal-fired plant boiler, plays and organizes coal dust firing, the chemical energy in the coal is converted into the key effect of heat energy.Coal burner is various informative, mainly is divided into DC burner and turbulent burner, and the former is used for taking on the boiler of corner tangential firing mode more, and the latter is mainly used on the boiler of wall firing.
Existing turbulent burner development has had last 100 years history so far, and common whirlwind tube burner, scroll casing type burner, two accent wind combustor are arranged, and the burner of a wind-heat wind displacement etc. are to adapt to different coals and boiler.At present comparatively common two wind combustors of transferring can the higher bituminous coal of burn cleanly fugitive constituent, to reduce the generation of atmosphere pollution NOx.
At burner internal insulation breeze airflow (wind) and auxiliary combustion air (secondary wind), promptly wind and secondary wind have separately independently passage to old turbulent burner on version, burner inside, and the primary and secondary air passage is isolated, and each is irrelevant.Just begin to mix after leaving burner outlet.Old turbulent burner has such limitation:
1, the primary air velocity adjustable extent is little.Be subjected to the restriction of minimum wind speed in the power transportation pipe, the primary air velocity degree adjustable extent of common old burner is less.
2, the coal powder density adjustable range is little.The coal powder density of old burner adopts venturi, bluff body, twisted blade etc. to carry out Pulverized Coal Concentration usually, and coal powder density distributes in airduct cross section to change, and it is narrower that said method is regulated the coal powder density scope; The burner that also has (as the PAX burner), an elegance substitute mode, or wind uses whirlwind to carry out coal dust to separate, but all concentrate at combustor external, thereby complex structure, the space that accounts for is bigger.
3, coal adaptability narrow range.Old burner requires ature of coal stable, or only is used to the meager coal that burns, or only is used for bituminous coal, if the coal change is too big in the use, unstable combustion is just arranged or catch fire and too closely burn the danger of spout.
Summary of the invention
The purpose of this utility model provides and a kind ofly communicates with secondary air channel and form the classification conveying of wind and secondary wind at the inner wind passage of burner, the Venturi throat of mixture in an air channel of primary wind and powder can be divided into concentrated phase and dilute phase, the concentrated phase wind powder mixture sprays through the dilatation pipe, the dilute phase wind powder mixture branches to secondary air duct to be mixed with secondary wind, by two classification turbulent burners of secondary air duct ejection.
A kind of pair of classification turbulent burner, comprise primary wind and powder import 1, Venturi tube 2, secondary wind inlet 6, interior secondary air channel 7, outer secondary air channel 8, interior secondary wind swirling flow baffle plate 9, outer secondary wind swirling flow baffle plate 10, it is characterized in that described primary wind and powder import 1 is connected with Venturi tube 2, deep or light separator tube 3 is connected with a wind dilatation pipe 5, the inlet of the outlet of Venturi tube 2 and deep or light separator tube 3 is installed on the center line also close, form the structure that wind passage communicates with secondary air channel, in the outlet of Venturi tube 2 and the porch of deep or light separator tube 3 a wind adjustable ring 4 is arranged, interior secondary air channel 7 is fixed on the outside of a wind dilatation pipe 5, the outside of secondary air channel 7 in outer secondary air channel 8 is fixed on, in secondary wind inlet 6, being provided with in secondary wind swirling flow baffle plate 9 with outside secondary wind swirling flow baffle plate 10.Described deep or light separator tube 3 is truncated cone-shaped or tubaeform or taper.A described wind adjustable ring 4 can move along the axis of Venturi tube 2.
The utlity model has following advantage:
1. coal adaptability is strong.Because the amplitude of accommodation of primary air velocity and coal powder density is very wide, therefore very strong coal adaptability is arranged, estimate to go for volatile matter V
Daf=12% meager coal to the volatile matter height to V
DafThe burning of=37% bituminous coal.
2.NOx the control effect is good.Since the clean burning measure of having taked the burning of fuel staging and air classification to combine, and can form very dark air classification burning, more superior than existing two wind combustor NOx control effects of transferring on bituminous coal fired boiler in theory, estimate for burning volatile matter V
Daf=25% bituminous coal fired boiler, NOx can control to 400mg/m
3In, NOx can be controlled to 600mg/m for the meager coal boiler
3In.
3. combustion stability is good, and the underload ability is strong.Because primary air velocity can regulate significantly, coal dust can be highly concentrated, thereby combustion stability and underload ability obviously are better than existing other burner in theory.
4. simple in structure, be convenient to make, install and maintenance, be fit to selecting for use and the transformation of old unit of newly-built unit.Simple in structure, be convenient to make, install and maintenance, because superior performance, be suitable on the new unit, the technological transformation of meager coal and bituminous coal fired boiler also is very suitable for simultaneously burning, thereby market is extensive, and because superior performance will can be the application of China's colm and the NOx reduction of discharging of fired power generating unit plays a role.
Description of drawings
Fig. 1 is a cutaway view of the present utility model.
Among the figure:
1---the deep or light separator tube of primary wind and powder import 2---Venturi tube 3---
4---wind adjustable ring 5---a wind dilatation pipe 6---secondary wind inlets
7---the interior secondary wind swirling flow baffle plates of interior secondary air channel 8---outer secondary air channel 9---
10---outer secondary wind swirling flow baffle plate
The specific embodiment
Two classification turbulent burners as shown in Figure 1, comprise primary wind and powder import 1, Venturi tube 2, deep or light separator tube 3, a wind adjustable ring 4, a wind dilatation pipe 5, secondary wind inlet 6, interior secondary air channel 7, outer secondary air channel 8, interior secondary wind swirling flow baffle plate 9, outer secondary wind swirling flow baffle plate 10, described primary wind and powder import 1 is that an elbow is connected with Venturi tube 2, deep or light separator tube 3 is connected with a wind dilatation pipe 5, the inlet of the outlet of Venturi tube 2 and deep or light separator tube 3 is installed on the center line also close, form the structure that wind passage communicates with secondary air channel, described deep or light separator tube 3 is a truncated cone-shaped, the osculum end is corresponding with the outlet of Venturi tube 2, in the outlet of Venturi tube 2 and the porch of deep or light separator tube 3 a wind adjustable ring 4 is arranged, a described wind adjustable ring 4 can move along Venturi tube 2, in order to regulate the flow area of wind passage and secondary air channel, interior secondary air channel 7 is fixed on the outside of a wind dilatation pipe 5, the outside of secondary air channel 7 in outer secondary air channel 8 is fixed on, in secondary wind inlet 6, being provided with in secondary wind swirling flow baffle plate 9 with outside secondary wind swirling flow baffle plate 10.
After wind and breeze airflow enter elbow, at first carry out Pulverized Coal Concentration by Venturi tube 2.When breeze airflow leaves Venturi tube, in passage, form centre concentration height, the low breeze airflow of concentration all around, and move to the inlet of deep or light separator tube 3.Because the effect of self inertia power and an interior secondary wind and a leeway (secondary wind static pressure is less than a wind static pressure herein), be in passage air stream all around and enter interior secondary air channel together with the fraction coal dust, most coal dust is then because the effect of inertia force enters deep or light separator tube, increase along with the flow area of the deep or light separator tube of circular platform type, the primary air velocity degree descends, and makes that the coal powder density of channel center is higher because spread around the air.
By above-mentioned process, the degree of a wind Pulverized Coal Concentration, primary air velocity decline degree has relation with the air capacity and the coal dust amount that are separated to secondary wind, here by regulating a wind adjustable ring 4, change the area that primary and secondary air is communicated with, can control easily, secondary windshield plate aperture and primary and secondary air air velocity in changing in addition, also can regulate the differential static pressure of primary and secondary air significantly, thereby control separates the primary air flow that enters secondary wind.
A denseer wind coal dust helps catching fire of breeze airflow, and can reduce the generation of NOx, a part of coal dust is separated and secondary wind premix simultaneously, thereby formed the form of fuel staging, further reduce the generation of NOx, and the coal dust of separating earlier is very thin, is wrapped in the outside of main breeze airflow, thereby has promoted to catch fire.
A wind passage of burner communicates with secondary air channel, in burner inside wind of part is separated in the secondary wind.Gap between them can utilize a wind adjustable ring to regulate.Because wind of part can be separated to secondary wind inside, thereby form a wind and can regulate.
In burner inside coal dust is separated, thinner coal dust is split into secondary air channel inside in a wind passage, because inertia force and first and second leeway, the thinner coal dust of part is split into secondary wind inside, thereby in burner, fuel is divided into two strands of coal dusts of isolating fully, one dense one is light, formed the fuel-staged combustion mode.Realized fuel staging and air classification in burner inside, thereby be the turbulent burner of a kind of pair of classification.
Burner is used by a deep or light separator tube and a wind adjustable ring, the adjusting primary air velocity and the coal powder density of spoke degree greatly, and the coal dust amount that is separated to secondary wind, primary air velocity can be regulated little of more than 30% in principle, can not reduce yet, the burner concentration of pulverized coal is quite big with the adjustable range of the coal dust amount that is separated to secondary wind, decides on the concrete structure design.
Claims (5)
1. two classification turbulent burner, comprise primary wind and powder import (1), Venturi tube (2), secondary wind inlet (6), interior secondary air channel (7), outer secondary air channel (8), interior secondary wind swirling flow baffle plate (9), outer secondary wind swirling flow baffle plate (10), it is characterized in that described primary wind and powder import (1) is connected with Venturi tube (2), deep or light separator tube (3) is connected with a wind dilatation pipe (5), the inlet of the outlet of Venturi tube (2) and deep or light separator tube (3) is installed on the center line also close, form the structure that wind passage communicates with secondary air channel, in the outlet of Venturi tube (2) and the porch of deep or light separator tube (3) a wind adjustable ring (4) is arranged, interior secondary air channel (7) is fixed on the outside of a wind dilatation pipe (5), outer secondary air channel (8) is fixed on the outside of interior secondary air channel (7), in secondary wind inlet (6), being provided with secondary wind swirling flow baffle plate (9) and outside secondary wind swirling flow baffle plate (10).
2. according to claim 1 pair of classification turbulent burner is characterized in that described deep or light separator tube (3) is truncated cone-shaped.
3. according to claim 1 pair of classification turbulent burner is characterized in that described deep or light separator tube (3) is for tubaeform.
4. according to claim 1 pair of classification turbulent burner is characterized in that described deep or light separator tube (3) is taper.
5. according to claim 1 or 2 or 3 or 4 described pairs of classification turbulent burners, it is characterized in that a described wind adjustable ring (4) can move along the axis of Venturi tube (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02253094 CN2564873Y (en) | 2002-09-09 | 2002-09-09 | Double step cyclone-burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02253094 CN2564873Y (en) | 2002-09-09 | 2002-09-09 | Double step cyclone-burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2564873Y true CN2564873Y (en) | 2003-08-06 |
Family
ID=33722353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02253094 Expired - Fee Related CN2564873Y (en) | 2002-09-09 | 2002-09-09 | Double step cyclone-burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2564873Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009009945A1 (en) * | 2007-07-18 | 2009-01-22 | Harbin Institute Of Technology | Low nox swirling pulverized coal burner |
| CN102506426A (en) * | 2012-01-04 | 2012-06-20 | 山东中实易通集团有限公司 | Variable-section cyclone burner |
| CN106196040A (en) * | 2016-08-29 | 2016-12-07 | 金大地新能源（天津）集团股份有限公司 | Coal burner |
-
2002
- 2002-09-09 CN CN 02253094 patent/CN2564873Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009009945A1 (en) * | 2007-07-18 | 2009-01-22 | Harbin Institute Of Technology | Low nox swirling pulverized coal burner |
| CN102506426A (en) * | 2012-01-04 | 2012-06-20 | 山东中实易通集团有限公司 | Variable-section cyclone burner |
| CN106196040A (en) * | 2016-08-29 | 2016-12-07 | 金大地新能源（天津）集团股份有限公司 | Coal burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030806 Termination date: 20100909 |