CN109945162A - The asymmetrical W flame boiler of burner's angle on a kind of preceding chimney arch and rear chimney arch - Google Patents
The asymmetrical W flame boiler of burner's angle on a kind of preceding chimney arch and rear chimney arch Download PDFInfo
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- CN109945162A CN109945162A CN201910180616.4A CN201910180616A CN109945162A CN 109945162 A CN109945162 A CN 109945162A CN 201910180616 A CN201910180616 A CN 201910180616A CN 109945162 A CN109945162 A CN 109945162A
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Abstract
The asymmetrical W flame boiler of burner's angle on a kind of preceding chimney arch and rear chimney arch, the present invention relates to a kind of pulverized-coal fired boilers, the present invention is in order to solve the problems, such as W flame boiler fluid field in furnace deflection, it includes upper furnace, lower hearth, preceding chimney arch, chimney arch afterwards, multiple coal burners and multiple classification wind snouts, multiple coal burners are installed on preceding chimney arch, multiple coal burners are installed on chimney arch afterwards, the axis of each burner and the angle of vertical direction are a on preceding chimney arch, the axis of each burner and the angle of vertical direction are β on chimney arch afterwards, α and β are adjustable, β numerical value is greater than a numerical value, a is acute angle.Multiple classification wind snouts are mounted on front wall, and multiple classification wind snouts are mounted on rear wall, belong to technical field of boiler combustion.
Description
Technical field
The present invention relates to a kind of pulverized-coal fired boilers, and in particular to burner's angle is asymmetrical on a kind of preceding chimney arch and rear chimney arch
W flame boiler, belongs to technical field of boiler combustion.
Background technique
China's anthracite rich reserves.Anthracite volatile matter is low, there are problems that the aspects such as kindling is difficult, burn-off rate is low.W
Flame boiler lower hearth space is larger, and lower hearth is equipped with a large amount of wall with refractory lining, refracto, and furnace combustion temperature is high, and flame travel is long,
It is that one kind is suitable for using the anthracitic type of furnace, therefore, W flame boiler becomes China and uses anthracitic main force's type of furnace.
There are serious skewness, furnace is interior to be formed " after preceding length in lower hearth flow field in the W flame boiler actual motion of part
It is short " type flame, burns serious asymmetric.Following harm: 1 poor combustion stability can be generated by burning phenomenon in W flame Boiler Furnace partially, be flown
Grey combustible content is high；Heat load distribution is uneven in 2 furnaces；3 furnace pressure fluctuations are big, may cause fire-putting-out emergency, sternly
Ghost image rings safe operation of the boiler.Therefore, it is to guarantee the important way of W flame safe operation of the boiler that boiler flow field deflection, which is mitigated or eliminated,
One of through.
A kind of Chinese utility model patent " adjustable W type flame boiler of outside burner cross dip " publication date is 2015
15 days 04 month year, application No. is the 201420733171.0, applyings date to propose that a kind of outside burner is horizontal on November 27th, 2014
To the W type flame boiler of tilt adjustable.The utility model patent be adjust forward and backward chimney arch burning cross dip simultaneously, rather than
Forward and backward chimney arch asymmetric adjustment.What the utility model solved is side wall clogging problems, rather than forward and backward wall flow field skew problems.
Summary of the invention
The present invention is to solve the problems, such as W flame boiler fluid field in furnace deflection, proposes to burn on a kind of preceding chimney arch and rear chimney arch
The asymmetrical W flame boiler of device angle.
The present invention in order to solve the above problem and the technical solution adopted is that:
It includes upper furnace, lower hearth, preceding chimney arch, rear chimney arch, multiple coal burners and multiple classification wind snouts, forehearth
Multiple coal burners are installed on arch, multiple coal burners are installed on rear chimney arch, the axis of each burner on preceding chimney arch
The angle of line and vertical direction is a, and the axis of each burner and the angle of vertical direction are that β, α and β are adjustable on rear chimney arch,
β numerical value is greater than a numerical value, and a is acute angle.Multiple classification wind snouts are mounted on front wall, and multiple classification wind snouts are mounted on rear wall.
Beneficial effects of the present invention:
The present invention considerably reduces unburned combustible in fly ash.After former W flame boiler wall breeze airflow kindling evening, under penetrate depth
It spends small, is only capable of reaching lack of gas nozzle and just turn back upwards, flame travel is too short, and coal dust is short in the residence time of lower hearth, winged
Grey combustible content is high, and boiler economics are poor.W flame boiler coal-ash air-flow of the invention is respectively from preceding chimney arch, rear chimney arch
Wind snout of burner injects burner hearth, and rear wall breeze airflow incident angle is greater than front wall breeze airflow incident angle, front wall coal
Powder dump angle degree is small, and horizontal direction momentum is small, and rear wall breeze airflow incident angle is big, and horizontal direction momentum is big, certain journey
Wall breeze airflow after front wall breeze airflow squeezes is avoided on degree, extends rear wall breeze airflow in the stroke of lower hearth, it is forward and backward
Wall breeze airflow can reach at dry bottom hopper, solve the problems, such as fluid field in furnace deflection, lower hearth flame degree of filling is high, and flying dust can
Combustion things content is greatly lowered.In addition, can measure each measuring point temperature value on the inside of dry bottom hopper water-cooling wall by thermocouple, as judgement
The foundation of combustion position quality in furnace adjusts the size of the incident angle of burner breeze airflow using this parameter as criterion, guarantees
Lower hearth flame degree of filling is high, and breeze airflow burning is abundant.The present invention can solve the problems, such as W flame boiler fluid field in furnace deflection,
Unburned combustible in fly ash is greatly lowered.
Detailed description of the invention
Fig. 1 is W flame boiler structure schematic diagram of the invention, and lack of gas spout is arranged on front wall and rear wall in figure, in figure
Arrow direction is the direction that each stock sprays into gas stream in the stove.
Fig. 2 is W flame boiler structure schematic diagram of the invention, and lack of gas spout is arranged in preceding chimney arch and rear chimney arch in figure
On, arrow direction is the direction that each stock sprays into gas stream in the stove in figure.
Specific embodiment
Specific embodiment 1: illustrating present embodiment, a kind of preceding chimney arch and rear furnace described in present embodiment in conjunction with Fig. 1-2
The asymmetrical W flame boiler of burner's angle on arch, it includes upper furnace 1, lower hearth 2, preceding chimney arch 3, rear chimney arch 4, Duo Gemei
Powder burner 5 and multiple classification wind snouts 7 are equipped with multiple coal burners 5 on preceding chimney arch 3, are equipped on rear chimney arch 4 multiple
Coal burner 5, the axis of each burner 5 and the angle of vertical direction are a on preceding chimney arch 3, each burner on rear chimney arch 4
5 axis and the angle of vertical direction are that β, α and β are adjustable, and β numerical value is greater than a numerical value, and a is acute angle.Multiple classification wind snouts 7
It is mounted on front wall 8, multiple classification wind snouts 7 are mounted on rear wall 9.
Specific embodiment 2: embodiment is described with reference to Fig. 1, a kind of preceding chimney arch and rear chimney arch described in present embodiment
The asymmetrical W flame boiler of upper burner's angle, it includes multiple lack of gas spouts 6, and multiple lack of gas spouts 6 are equipped on front wall 8,
And the lack of gas spout 6 on front wall 8 is located at 7 top of classification wind snout on front wall 8, is equipped with multiple lack of gas spouts 6 on rear wall 9,
The lack of gas spout 6 on wall 9 is located at 7 top of classification wind snout on rear wall 9 afterwards.Other methods are same as the specific embodiment one.
Specific embodiment 3: embodiment is described with reference to Fig. 2, a kind of preceding chimney arch and rear chimney arch described in present embodiment
The asymmetrical W flame boiler of upper burner's angle, it includes multiple lack of gas spouts 6, and multiple lack of gas spouts are equipped on preceding chimney arch 3
6, and multiple lack of gas spouts 6 on preceding chimney arch 3 are arranged between multiple coal burners 5 and front wall 8, are equipped on rear chimney arch 4
Multiple lack of gas spouts 6, and multiple lack of gas spouts 6 on rear chimney arch 4 are arranged between multiple coal burners 5 and rear wall 9.It is other
Method is same as the specific embodiment one.
Specific embodiment 4: illustrating present embodiment, a kind of preceding chimney arch and rear furnace described in present embodiment in conjunction with Fig. 1-2
The asymmetrical W flame boiler of burner's angle on arch, the axis of each burner 5 and the angle angle β of vertical direction on rear chimney arch 4
Degree is more than or equal to 10 ° with the axis of each burner 5 on preceding chimney arch 3 and the angle a angle difference of vertical direction.9 coal dust of wall afterwards
Dump angle degree is greater than 8 breeze airflow incident angle of front wall, and 8 breeze airflow incident angle of front wall is small, and horizontal direction momentum is small,
9 breeze airflow incident angle of wall is big afterwards, and horizontal direction momentum is big, solves wall 9 after the extruding of 8 breeze airflow of front wall to a certain extent
Breeze airflow is partial to the problem of rear wall 9 movement, meanwhile, preceding chimney arch 3 and 4 lower section of rear chimney arch can form stable recirculating zone,
Unburned combustible in fly ash reduces.Other methods are same as the specific embodiment one.
Specific embodiment 5: illustrating present embodiment, a kind of preceding chimney arch and rear furnace described in present embodiment in conjunction with Fig. 1-2
The asymmetrical W flame boiler of burner's angle on arch, it further includes two groups of thermocouples 11, along burner hearth on 10 front wall 8 of dry bottom hopper
Width direction is equipped with one group of thermocouple 11, is equipped with another group of thermocouple along furnace chamber width on wall 9 after dry bottom hopper 10
11, every group of thermocouple 11 is made of more thermocouples 11, and in two groups of thermocouples 11 each thermocouple 11 on dry bottom hopper 10
Mounting height it is identical.Thermocouple 11 is uniformly arranged in wall 9 after 10 front wall 8 of dry bottom hopper and dry bottom hopper 10 along furnace chamber width
On, it can be with the flue-gas temperature near 9 measuring point of wall after 10 front wall 8 of real-time measurement dry bottom hopper and dry bottom hopper 10, according to two sides flue gas temperature
The size of angle value, it is each on the axis of each burner 5 and the angle β angle of vertical direction and preceding chimney arch 3 on chimney arch 4 after adjustment
The axis of burner 5 and the angle a of vertical direction are realized symmetrically fire in furnace by this method until two sides temperature value is equal
It burns.Other methods are same as the specific embodiment one.
Claims (5)
1. the asymmetrical W flame boiler of burner's angle on a kind of preceding chimney arch and rear chimney arch, it includes upper furnace (1), lower hearth
(2), preceding chimney arch (3), rear chimney arch (4), multiple coal burners (5) and multiple classification wind snouts (7), it is characterised in that: forehearth
It is equipped with multiple coal burners (5), is equipped with multiple coal burners (5) on rear chimney arch (4), on preceding chimney arch (3) on arch (3)
The axis of each burner (5) and the angle of vertical direction are a, the axis of each burner (5) and vertical side on rear chimney arch (4)
To angle be β, β numerical value is greater than a numerical value, and a is acute angle, and multiple classification wind snouts (7) are mounted on front wall (8), multiple classifications
Wind snout (7) is mounted on rear wall (9).
2. the asymmetrical W flame boiler of burner's angle, feature on a kind of preceding chimney arch and rear chimney arch according to claim 1
Be: it includes multiple lack of gas spouts (6), and multiple lack of gas spouts (6) are equipped on front wall (8), and the lack of gas spray on front wall (8)
Mouth (6) is located above the classification wind snout (7) on front wall (8), is equipped with multiple lack of gas spouts (6), rear wall (9) on rear wall (9)
On lack of gas spout (6) be located above the classification wind snout (7) on rear wall (9).
3. the asymmetrical W flame boiler of burner's angle, feature on a kind of preceding chimney arch and rear chimney arch according to claim 1
Be: it includes multiple lack of gas spouts (6), multiple lack of gas spouts (6) is equipped on preceding chimney arch (3), and more on preceding chimney arch (3)
A lack of gas spout (6) is arranged between multiple coal burners (5) and front wall (8), and multiple lack of gas sprays are equipped on rear chimney arch (4)
Mouth (6), and multiple lack of gas spouts (6) on rear chimney arch (4) are arranged between multiple coal burners (5) and rear wall (9).
4. the asymmetrical W flame boiler of burner's angle, feature on a kind of preceding chimney arch and rear chimney arch according to claim 1
It is: the angle β angle of the axis and vertical direction of each burner (5) and each burning on preceding chimney arch (3) on rear chimney arch (4)
The axis of device (5) and the angle a angle difference of vertical direction are more than or equal to 10 °.
5. the asymmetrical W flame boiler of burner's angle, feature on a kind of preceding chimney arch and rear chimney arch according to claim 1
Be: it further includes two groups of thermocouples (11), is equipped with one group of thermoelectricity along furnace chamber width on dry bottom hopper (10) front wall (8)
Even (11), are equipped with another group of thermocouple (11), every group of thermocouple along furnace chamber width on dry bottom hopper (10) afterwards wall (9)
(11) it is made of more thermocouples (11), and peace of each thermocouple (11) on dry bottom hopper (10) in two groups of thermocouples (11)
Dress height is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910180616.4A CN109945162B (en) | 2019-03-11 | 2019-03-11 | W flame boiler with unequal burner angles on front furnace arch and rear furnace arch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910180616.4A CN109945162B (en) | 2019-03-11 | 2019-03-11 | W flame boiler with unequal burner angles on front furnace arch and rear furnace arch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109945162A true CN109945162A (en) | 2019-06-28 |
| CN109945162B CN109945162B (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910180616.4A Active CN109945162B (en) | 2019-03-11 | 2019-03-11 | W flame boiler with unequal burner angles on front furnace arch and rear furnace arch |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58120002A (en) * | 1982-01-13 | 1983-07-16 | Mitsubishi Heavy Ind Ltd | Boiler |
| CN102297420A (en) * | 2011-08-15 | 2011-12-28 | 哈尔滨工业大学 | Ejecting staged combustion W-flame boiler with thin pulverized coal air flow drawn to bottom |
| CN105546521B (en) * | 2015-12-28 | 2017-11-03 | 哈尔滨工业大学 | The W flame boiler of vortex burner primary and secondary air arranged off-centre |
| CN107559858A (en) * | 2017-09-12 | 2018-01-09 | 哈尔滨工业大学 | Turbulent burner W flame boiler with interior straight outward turning ammonia-gas spraying device |
-
2019
- 2019-03-11 CN CN201910180616.4A patent/CN109945162B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58120002A (en) * | 1982-01-13 | 1983-07-16 | Mitsubishi Heavy Ind Ltd | Boiler |
| CN102297420A (en) * | 2011-08-15 | 2011-12-28 | 哈尔滨工业大学 | Ejecting staged combustion W-flame boiler with thin pulverized coal air flow drawn to bottom |
| CN105546521B (en) * | 2015-12-28 | 2017-11-03 | 哈尔滨工业大学 | The W flame boiler of vortex burner primary and secondary air arranged off-centre |
| CN107559858A (en) * | 2017-09-12 | 2018-01-09 | 哈尔滨工业大学 | Turbulent burner W flame boiler with interior straight outward turning ammonia-gas spraying device |
Non-Patent Citations (2)
| Title |
|---|
| 周江华等: "超临界600 MW 机组英巴W 火焰炉偏斜气固两相流和不对称燃烧研究", 《热力发电》 * |
| 苗长信: "600MW机组W火焰锅炉"偏烧"问题分析", 《热力发电》 * |
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| CN109945162B (en) | 2019-12-10 |
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