CN207196535U - Boiler air flue anti-blockage structure - Google Patents
Boiler air flue anti-blockage structure Download PDFInfo
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- CN207196535U CN207196535U CN201721231693.0U CN201721231693U CN207196535U CN 207196535 U CN207196535 U CN 207196535U CN 201721231693 U CN201721231693 U CN 201721231693U CN 207196535 U CN207196535 U CN 207196535U
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- flue
- air
- boiler
- outlet
- bellows
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a kind of boiler air flue anti-blockage structure, particularly a kind of boiler air flue anti-blockage structure for being related to boiler air flue system field.Boiler air flue anti-blockage structure of the present utility model, including flue, cavity and the air preheater communicated with cavity, the outlet bellows of two row longitudinal arrangements are provided with the air preheater, two list and form air channel between one's intention as revealed in what one says case, flue outlet is provided with the flue, flue outlet connects with air preheater, pressure fan is provided at both ends with air channel, the both sides of the pressure fan are provided with steam air heater, the closure plate before steam air heater is provided with warm wind towards the side in air channel, the closure plate before air outlet bellows are provided with bellows towards the side in air channel.The application improves unit generation load, effectively prevent wind flue blockage, reduces the shutdown of boiler time, maximumlly ensures boiler normal operation, reduces coal gas diffusion amount.
Description
Technical field
It the utility model is related to a kind of boiler air flue anti-blockage structure, particularly one kind and be related to boiler air flue system neck
The boiler air flue anti-blockage structure in domain.
Background technology
Boiler design load 240t/h, 540 DEG C, pressure 9.8MPa of temperature, fuel are three kinds of blast furnace, coke oven and converter coals
Gas, is the pure boiler that burns gas, a supporting 55MW Turbo-generator Set.
In the prior art in order to make full use of the energy, usually allow production to consume rich coal gas with boiler and generated electricity, example
Such as Design cooling load 240t/h, 540 DEG C, pressure 9.8MPa of temperature, boiler oil be blast furnace, three kinds of coal gas of coke oven and converter, match somebody with somebody
Cover a 55MW Turbo-generator Set.Due to the condition of production of each blast furnace coke oven converter, the service condition of each coal gas user
And the change of gas chamber position, Boiler Steam load change therewith.Need to largely burn coal gas when coal gas abundance, to balance coal
Gas holder position, avoids coal gas diffusion；Coal gas consumption need to be reduced when coal gas deficiency, to ensure that ductwork pressure is unlikely to too low.The pot
The productive prospecting of stove determines that it has problems with the process of running：
First, steam load fluctuation range is big, generally changes between 100~220t/h.
2nd, some stage is chronically between low load region and run, and steam load is between 120~150t/h.
3rd, exhaust gas temperature is for a long time at 130 DEG C or so, below acid dew point.
4th, air channel blocks serious, air blower inlet baffle opening when changing between 50%~100% oxygen content substantially without
Change.
5th, flue knot acid dirt is serious, channel blockage, and induced-draught fan inlet baffle all ends generator and is only capable of bearing with 37MW
Lotus, and induced-draught fan gas approach negative pressure is up to 5030Pa.
Utility model content
The utility model, which provides one kind, can quickly solve wind flue blockage, reduce the shutdown of boiler time, maximumlly
Ensure boiler normal operation, reduce the boiler air flue anti-blockage structure of coal gas diffusion amount.
The utility model is boiler air flue anti-blockage structure used by solving the above problems, including flue, cavity and
The air preheater communicated with cavity, is provided with the outlet bellows of two row longitudinal arrangements in the air preheater, and two list between one's intention as revealed in what one says case
Air channel is formed, is provided with flue outlet on the flue, flue outlet is connected with air preheater, and air-supply is provided at both ends with air channel
Machine, the both sides of the pressure fan are provided with steam air heater, the closure plate before steam air heater is provided with warm wind towards the side in air channel, in air-out
Closure plate before one's intention as revealed in what one says case is provided with bellows towards the side in air channel.
It is further to be provided with deflector in the air channel.
It is further, in addition to by-pass flue, the by-pass flue connects cavity with flue outlet, in flue outlet
Place is provided with induced-draught fan.
It is further that the by-pass flue is provided with push-pull valve with cavity junction, and the by-pass flue connects with flue
Push-pull valve is provided with mouthful.
It is further to be additionally provided with reinforcement at closure plate before the bellows.
The beneficial effects of the utility model are：The application utilizes and is arranged on a series of of air outlet bellows and steam air heater etc.
Closure plate forms the air duct of short circuit, and when air preheater hypomere blocks, air is around air preheater hypomere and via the air of short circuit
Passage, directly enter epimere air preheater by bellows, and strengthen air-supply using the pressure fan at both ends, to strengthen the conveying energy of air
Power, unit generation load is improved, effectively prevent wind flue blockage, reduced the shutdown of boiler time, maximumlly ensure boiler
Normal operation, reduce coal gas diffusion amount.
Brief description of the drawings
Fig. 1 is the utility model air preheater air channel contact top view；
Fig. 2 is the utility model air preheater air channel contact side view；
Fig. 3 is the utility model air preheater flue contact side view；
Parts, position and numbering in figure：Closure plate 6 before flue 1, cavity 2, air preheater 3, air channel 4, steam air heater 5, warm wind,
Closure plate 7, deflector 8, by-pass flue 9, flue outlet 10, induced-draught fan 11, pressure fan 12 before bellows.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
Boiler air flue anti-blockage structure as shown in Figures 1 and 2, including flue 1, cavity 2 and the sky communicated with cavity 2
Pre- device 3, is provided with the outlet bellows of two row longitudinal arrangements in the air preheater 3, and two list and form air channel 4, institute between one's intention as revealed in what one says case
State and flue outlet 10 is provided with flue 1, flue outlet 10 is connected with air preheater 3, and pressure fan is provided at both ends with air channel 4
12, the both sides of the pressure fan 12 are provided with steam air heater 5, the closure plate 6 before steam air heater 5 is provided with warm wind towards the side in air channel 4,
The closure plate 7 before air outlet bellows are provided with bellows towards the side in air channel 4.The application utilizes and is arranged on air outlet bellows and warm wind
A series of closure plates of device 5 etc. form the air duct of short circuit, and when the hypomere of air preheater 3 blocks, air is bypassed under air preheater 3
Section and via the air duct of short circuit, directly enter epimere air preheater 3 by bellows, and send using the reinforcement of pressure fan 12 at both ends
Wind, to strengthen the conveying capacity of air, unit generation load is carried, effectively prevent wind and smoke road 1 and block, when reducing shutdown of boiler
Between, maximumlly ensure boiler normal operation, reduce coal gas diffusion amount.
Deflector 8 is provided with the air channel 4.Deflector 8 is set in air channel 4, is favorably improved air circulation speed
Rate.
As shown in figure 3, also including by-pass flue 9, the by-pass flue 9 connects cavity 2 with flue outlet 10, in flue
Export and induced-draught fan 11 is provided with 10.
When flue 1 blocks, flue gas also can be directly entered suction via by-pass flue 9 around the hypomere of one-level air preheater 3
The flue 1 of blower fan 11, the conveying capacity of flue gas during so as to enhance system jams.
The by-pass flue 9 is provided with push-pull valve with the junction of cavity 2, and the by-pass flue 9 is set with the interface of flue 1
There is push-pull valve.Push-pull valve has opening and closing function, can airflow partition path as needed.Newly-increased flue 1 connects cavity with former flue 1
2 interfaces are sealed using plate, are easy to online perforate.
To design the boiler air-supply volume design load 200,000 m3/ h, the m of single admission amount 100,0003Exemplified by/h.Flowed according to design is recommended
Fast 16m/s is calculated, then it is 1.74m to need newly-increased short circuit cool air hose flow area2, take 1200 × 1450mm of opening size, the gross area
1.74m2, meet air-conditioning requirement.According to design air flow, the cross-sectional area that lower empty upper end is entered in one side is 640 × 3472=2.2m2, enter
Lower empty upper end flow velocity is 12.6m/s, is substantially conformed to《Burning and pulverized coal preparation system reckoner》10~12m/s of wind speed requirement, two
The new section manufactured size of short circuit air channel 4 in side is 1200 × 1450mm；
Former flue 1 increases flue 1 newly by southwest corner and northeast corner increases 1 two flues 1 of flue newly and bypassed, around the cigarette of blocking
Road 1, into induced-draught fan 11.Boiler load is reduced when cutting smoke hole, load is improved again after installing plate.
According to the difference between existing flue gas through-current capability and boiler at full capacity exhaust gas volumn, analysis calculating is obstructed operating mode flue gas
Measure about 17.5 ten thousand m3/ h, the Nm of signature condition amount about 100,0003/h.Flue gas flow rate is calculated by former design load 14m/s, and the required gross area is
3.5m2, it is 800mm × 1100mm according to on-site actual situations bore size.
The course of work：
During boiler operatiopn the outlet air of pressure fan 12 by the water conservancy diversion of air channel 4 that newly forms enter the epimere of one-level air preheater 3 around
Cross the air channel 4 blocked；Flue gas initially enters newly-increased flue 1, partial fume is around the one-level blocked because the newly-increased resistance of flue 1 is small
Air preheater 3 blocks flue 1 and is directly entered induced-draught fan 11.Behind newly-increased air channel 4 and flue 1, Turbo-generator Set can be achieved at full capacity
Operation.
To sum up the utility model is using newly-increased air channel 4 and flue 1, and when the hypomere of one-level air preheater 3 blocks, air bypasses one
The level hypomere of air preheater 3 directly enters epimere air preheater 3 by bellows, while flue gas also directly enters around the hypomere of one-level air preheater 3
Enter the flue 1 of induced-draught fan 11, the conveying capacity of air and flue gas significantly increases, and Boiler Steam yield increases to 210t/ by 150t/h
H, generation load increase to 55MW by 37MW, and unit can realize rated load operation.Shutdown of boiler 6 days when setting up air channel 4, use
North and south side steam air heater 5 is exported in entering the hypomere of one-level air preheater 3 outlet bellows installation closure plate, deflector 8 and installation pressure fan 12
Preceding closure plate；Boiler load is only reduced when setting up flue 1, without blowing out, online contact can be achieved.
Claims (5)
1. boiler air flue anti-blockage structure, including flue (1), cavity (2) and the air preheater (3) communicated with cavity (2), described
The outlet bellows of two row longitudinal arrangements are provided with air preheater (3), two list formation air channel (4) between one's intention as revealed in what one says case, the flue
(1) flue outlet (10) is provided with, flue outlet (10) connects with air preheater (3), it is characterised in that：Two in air channel (4)
End is provided with pressure fan (12), and the both sides of the pressure fan (12) are provided with steam air heater (5), in steam air heater (5) towards air channel (4)
Side be provided with closure plate (6) before warm wind, the closure plate (7) before air outlet bellows are provided with bellows towards the side of air channel (4).
2. boiler air flue anti-blockage structure as claimed in claim 1, it is characterised in that：It is provided with the air channel (4)
Deflector (8).
3. boiler air flue anti-blockage structure as claimed in claim 1, it is characterised in that：Also include by-pass flue (9), it is described
By-pass flue (9) connects cavity (2) with flue outlet (10), and flue outlet (10) place is provided with induced-draught fan (11).
4. boiler air flue anti-blockage structure as claimed in claim 3, it is characterised in that：The by-pass flue (9) and cavity
(2) junction is provided with push-pull valve, and the by-pass flue (9) is provided with push-pull valve with flue (1) interface.
5. boiler air flue (1) anti-blockage structure as claimed in claim 1, it is characterised in that：Closure plate (7) place before the bellows
It is additionally provided with reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721231693.0U CN207196535U (en) | 2017-09-25 | 2017-09-25 | Boiler air flue anti-blockage structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721231693.0U CN207196535U (en) | 2017-09-25 | 2017-09-25 | Boiler air flue anti-blockage structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207196535U true CN207196535U (en) | 2018-04-06 |
Family
ID=61787241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721231693.0U Active CN207196535U (en) | 2017-09-25 | 2017-09-25 | Boiler air flue anti-blockage structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207196535U (en) |
-
2017
- 2017-09-25 CN CN201721231693.0U patent/CN207196535U/en active Active
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