CN109737387A - A kind of device and working method preventing face-fired boiler side water wall high temperature corrosion - Google Patents
A kind of device and working method preventing face-fired boiler side water wall high temperature corrosion Download PDFInfo
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- CN109737387A CN109737387A CN201811498220.6A CN201811498220A CN109737387A CN 109737387 A CN109737387 A CN 109737387A CN 201811498220 A CN201811498220 A CN 201811498220A CN 109737387 A CN109737387 A CN 109737387A
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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
Abstract
The present invention relates to a kind of device and working method for preventing face-fired boiler side water wall high temperature corrosion, lower layer's burner, middle layer burner, upper layer burner, lower layer's after-flame air port, upper layer after-flame air port are symmetrically arranged in front water wall and rear water wall.Lower layer's burner, middle layer burner, upper layer burner contain 6 groups or 8 groups of burners respectively, wherein one group of novel burner, middle part arrangement turbulent burner are arranged in every layer of both ends.The present invention uses novel burner, by horizontal bias separation and semicircular ring non-swirl secondary air, substantially improves side water wall reducing atmosphere nearby, efficiently solves High Temperature Corrosion, and fundamentally solve the drawbacks of adherent wind application is brought；Using turbulent burner and the compound arrangement of Novel DC burner, it is not only able to achieve low nitrogen burning, and solves the problems, such as face-fired boiler side water wall high temperature corrosion；Structure is simple, easy to implement, is not necessarily to larger technological transformation to current large sized unit.
Description
Technical field
The present invention relates to a kind of devices and working method for preventing face-fired boiler side water wall high temperature corrosion.
Background technique
China's boilers of power plants coal quality is more miscellaneous, and often and the characteristic of design fuel is there are certain deviation, and coal quality is regular
Variation and coal blending blending are burnt unreasonable the problems such as often bringing slagging, contamination and high temperature corrosion, wherein High Temperature Corrosion pair
The influence of boiler operatiopn reliability is maximum, and with the raising of coal-burning boiler capacity and parameter, boiler water wall problem is also accordingly mentioned
Height also results in the generation of high temperature corrosion phenomenon；In addition, in order to reach NOxThe requirement of minimum discharge, most of power plant, which use, to be divided
The low nitrogen burnings mode such as level air-distribution, the oxygen debt burning of primary combustion zone have been further exacerbated by the high temperature corrosion of water-cooling wall.
The study found that before being arranged in burner hearth due to the burner and fire air nozzle of Opposite Firing Boiler,
Afterwards on wall, any air supply device is not arranged in both walls, therefore nearby oxygen concentration is extremely low for side wall intermediate region, presents
Apparent reducing atmosphere out causes water wall high temperature corrosion in the region serious.The generation major influence factors of high temperature corrosion
Are as follows: wall surface reducing atmosphere, tube wall temperature, H2S and SO3Concentration.Sulfur content is controlled from as-fired coal angle to contain high temperature corruption
Erosion, cost are too high, it is difficult to realize；Contain high temperature corrosion from tube wall temperature is reduced, influences unit economy；And from optimization
Wall surface reducing atmosphere is set out, and can mitigate water wall high temperature corrosion to a certain extent, but adherent wind method is asked there are following
Topic: 1) adherent wind covers incomplete in water-cooling wall, and uncovered area prevents the effect of high temperature corrosion poor, such as patent
CN200520020312.5；2) it cannot be distributed according to water-cooling wall surface reduction atmosphere and carry out the adherent air quantity of fining adjustment；3)
Adherent wind wind direction and water-cooling wall are axially perpendicular, and sea land distribution is than very fast, and effect halves, such as patent CN200810044352.1；
4) cooling condition of adherent wind snout is poor, spout burnout phenomenon easily occurs.
In conclusion adherent wind can be used as a kind of effective ways for solving water wall high temperature corrosion, but in practical application
Cause effect poor since method is improper, it is simple, easy to implement and do not influence combustion stability in furnace to be badly in need of a kind of system
With the device and method for preventing side water wall high temperature corrosion of boiler efficiency.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and providing one kind prevents opposed firing pot
The device and working method of furnace side wall water wall high temperature corrosion are separating new combustion using horizontal bias close to side wall region
Device, light First air and non-swirl secondary air have good rigidity, can effectively change side water wall reducing atmosphere nearby, from
The shortcomings that fundamentally overcoming adherent wind.
Technical solution used by the present invention solves the above problems is: one kind prevents face-fired boiler side water wall high
The device of temperature corrosion, which is characterized in that including front water wall, rear water wall, left wall water-cooling wall, right wall water-cooling wall, lower layer
Burner, middle layer burner, upper layer burner, lower layer's after-flame air port and upper layer after-flame air port；The front water wall, Hou Qiangshui
Cold wall, left wall water-cooling wall and right wall water-cooling wall composition liquidate burner hearth, lower layer's burner, middle layer burner, upper layer burner,
Lower layer's after-flame air port and upper layer after-flame air port are symmetrically arranged on front water wall and rear water wall, and lower layer's burner,
Middle layer burner and upper layer burner arrangement are in the lower part of front water wall and rear water wall, lower layer's after-flame air port and upper layer combustion
Scenery resource quality to the greatest extent is on the top of front water wall and rear water wall；Lower layer's burner, middle layer burner and upper layer burning
Device includes novel burner and turbulent burner, and novel burner is located at end, turbulent burner is located at middle part.
Furthermore, lower layer's burner, middle layer burner and upper layer burner contain 6 groups or 8 groups of burners,
Wherein every layer of burner both ends arrange that 1 group of novel burner, middle part arrange 4 groups or 6 groups of turbulent burners.
Furthermore, the novel burner includes primary wind pipe and secondary air duct, and primary wind pipe and two
Secondary air piping is in contact；The section of described primary wind pipe is circular ring shape, and the cross section of the secondary air duct is semi-circular shape,
Secondary air duct is provided with secondary air inlet and middle part forms secondary air channel, and the secondary air channel is located at primary wind pipe
Outside, secondary air channel are adjacent with left wall water-cooling wall or right wall water-cooling wall.
Furthermore, described primary wind pipe is provided with a wind inlet and controllable register, and the controllable register is located at
Inside primary wind pipe, adjustable angle, multiple controllable registers form shutter form, primary wind pipe are divided into dense primary
Wind channel and light First air channel separate for realizing First air and the horizontal bias of coal dust mixed gas.
Furthermore, the turbulent burner is HT-NR3 type turbulent burner, CF/SF type turbulent burner or DS type
Turbulent burner.4 groups or 6 groups can be arranged according to unit size, every layer of turbulent burner.
Prevent the working method of the device of face-fired boiler side water wall high temperature corrosion as follows:
Step 1: First air and coal dust mixed gas enter primary wind pipe by a wind inlet, in the work of multiple controllable registers
It is separated with lower realization horizontal bias, hearth combustion is sprayed by dense First air channel and light First air channel respectively；
Step 2: non-swirl secondary air enters secondary air channel by secondary air inlet, and it is combustion-supporting to be injected directly into burner hearth；
Step 3: First air and Secondary Air also enter hearth combustion by the turbulent burner arranged in the middle part of burner hearth；
Step 4: the rotational flow gas sprayed with the turbulent burner that novel burner is adjacently positioned, which can roll up, inhales dense First air channel
The gas of ejection forms fuel-rich regions, the non-swirl secondary air that the light First air and secondary air channel that light First air channel sprays spray
Left side oxygen-rich area or right side oxygen-rich area are formed close to left wall water-cooling wall or right wall water-cooling wall, improves the reproducibility gas of side water wall
Atmosphere.
Furthermore, the secondary air channel internal flow is non-swirl secondary air, and rigidity is strong, and range farther out, can be with
Reach side wall intermediate region.
Compared with prior art, the present invention having the following advantages that and effect:
1) present invention uses novel burner, by horizontal bias separation and semicircular ring non-swirl secondary air, substantially improves side wall
Reducing atmosphere near water-cooling wall, efficiently solves High Temperature Corrosion, and fundamentally solve adherent wind application and bring
The drawbacks of.
2) present invention uses turbulent burner and the compound arrangement of Novel DC burner, is not only able to achieve low nitrogen combustion
It burns, and solves the problems, such as face-fired boiler side water wall high temperature corrosion.
3) the configuration of the present invention is simple, it is easy to implement, larger technological transformation is not necessarily to current large sized unit, and do not influence furnace internal combustion
Burn stability and boiler efficiency.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the embodiment of the present invention.
Fig. 2 is the arrangement schematic diagram of single layer burner in the embodiment of the present invention.
Fig. 3 is the face the A-A schematic cross-sectional view in Fig. 2.
In figure: front water wall 1, rear water wall 2, left wall water-cooling wall 3, right wall water-cooling wall 4, novel burner 5, eddy flow
Burner 6, lower layer's burner 7, middle layer burner 8, upper layer burner 9, lower layer's after-flame air port 10, upper layer after-flame air port 11, a left side
Side oxygen-rich area 12, fuel-rich regions 14, primary wind pipe 15,16, wind inlets 51 of secondary air duct, is adjusted right side oxygen-rich area 13
Save baffle 52, secondary air inlet 53, dense First air channel 54, light First air channel 55, secondary air channel 56.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Embodiment.
Referring to Fig. 1 to Fig. 3, the device for preventing face-fired boiler side water wall high temperature corrosion in the present embodiment, packet
Include front water wall 1, rear water wall 2, left wall water-cooling wall 3, right wall water-cooling wall 4, lower layer's burner 7, middle layer burner 8, on
Layer burner 9, lower layer's after-flame air port 10 and upper layer after-flame air port 11；Front water wall 1, rear water wall 2, left wall water-cooling wall 3
The burner hearth that liquidates, lower layer's burner 7, middle layer burner 8, upper layer burner 9, lower layer's after-flame air port 10 are constituted with right wall water-cooling wall 4
It is symmetrically arranged on front water wall 1 and rear water wall 2 with upper layer after-flame air port 11, and lower layer's burner 7, middle layer burning
Device 8 and upper layer burner 9 are arranged in the lower part of front water wall 1 and rear water wall 2, lower layer's after-flame air port 10 and upper layer after-flame
Air port 11 is arranged in the top of front water wall 1 and rear water wall 2；Lower layer's burner 7, middle layer burner 8 and upper layer burning
Device 9 includes novel burner 5 and turbulent burner 6, and novel burner 5 is located at end, turbulent burner 6 is located at middle part.
Lower layer's burner 7, middle layer burner 8 and upper layer burner 9 contain 6 groups or 8 groups of burners, wherein every layer of burning
Device both ends respectively arrange that 1 group of novel burner 5, middle part arrange 4 groups or 6 groups of turbulent burners 6.
Novel burner 5 includes primary wind pipe 15 and secondary air duct 16, and primary wind pipe 15 and secondary air duct
16 are in contact；The section of primary wind pipe 15 is circular ring shape, and the cross section of secondary air duct 16 is semi-circular shape, secondary air duct
16, which are provided with secondary air inlet 53 and middle part, forms secondary air channel 56, secondary air channel 56 be located at primary wind pipe 15 outside
Portion, secondary air channel 56 are adjacent with left wall water-cooling wall 3 or right wall water-cooling wall 4.
Primary wind pipe 15 is provided with a wind inlet 51 and controllable register 52, and controllable register 52 is located at primary wind pipe 15
Inside, adjustable angle, multiple controllable registers 52 form shutter form, primary wind pipe 15 are divided into dense First air channel
54 and light First air channel 55, it is separated for realizing First air and the horizontal bias of coal dust mixed gas.
Turbulent burner 6 is HT-NR3 type turbulent burner, CF/SF type turbulent burner or DS type turbulent burner.It can
According to unit size, every layer of turbulent burner 6 arranges 4 groups or 6 groups.
Prevent the working method of the device of face-fired boiler side water wall high temperature corrosion as follows:
Step 1: First air and coal dust mixed gas are by the entrance primary wind pipe 15 of wind inlet 51, in multiple controllable registers
Horizontal bias separation is realized under the action of 52, and burner hearth combustion is sprayed by dense First air channel 54 and light First air channel 55 respectively
It burns；
Step 2: non-swirl secondary air enters secondary air channel 56 by secondary air inlet 53, and it is combustion-supporting to be injected directly into burner hearth；
Step 3: First air and Secondary Air also enter hearth combustion by the turbulent burner 6 arranged in the middle part of burner hearth；
Step 4: it is logical that the dense First air of suction can be rolled up with the rotational flow gas that the turbulent burner 6 that novel burner 5 is adjacently positioned sprays
The gas that road 54 sprays forms fuel-rich regions 14, what the light First air and secondary air channel 56 that light First air channel 55 sprays sprayed
Non-swirl secondary air forms left side oxygen-rich area 12 or right side oxygen-rich area 13 close to left wall water-cooling wall 3 or right wall water-cooling wall 4, improves side wall
The reducing atmosphere of water-cooling wall.
Furthermore, 56 internal flow of secondary air channel is non-swirl secondary air, and rigidity is strong, and range farther out, can arrive
Up to side wall intermediate region.
It is any to be familiar with although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff of this technology changes and retouches made without departing from the spirit and scope of the invention, should belong to this hair
Bright protection scope.
Claims (7)
1. a kind of device for preventing face-fired boiler side water wall high temperature corrosion, which is characterized in that including front water wall
(1), rear water wall (2), left wall water-cooling wall (3), right wall water-cooling wall (4), lower layer's burner (7), middle layer burner (8), on
Layer burner (9), lower layer's after-flame air port (10) and upper layer after-flame air port (11)；The front water wall (1), rear water wall
(2), left wall water-cooling wall (3) and right wall water-cooling wall (4) composition liquidate burner hearth, lower layer's burner (7), middle layer burner (8),
Upper layer burner (9), lower layer's after-flame air port (10) and upper layer after-flame air port (11) be symmetrically arranged in front water wall (1) and after
On wall water-cooling wall (2), and lower layer's burner (7), middle layer burner (8) and upper layer burner (9) are arranged in front water wall (1)
With the lower part of rear water wall (2), lower layer's after-flame air port (10) and upper layer after-flame air port (11) be arranged in front water wall (1) and
The top of rear water wall (2)；Lower layer's burner (7), middle layer burner (8) and upper layer burner (9) include novel
Burner (5) and turbulent burner (6), and novel burner (5) is located at end, turbulent burner (6) is located at middle part.
2. the device according to claim 1 for preventing face-fired boiler side water wall high temperature corrosion, which is characterized in that
Lower layer's burner (7), middle layer burner (8) and upper layer burner (9) contain 6 groups or 8 groups of burners, wherein every layer of combustion
Burner both ends respectively arrange that 1 group of novel burner (5), middle part arrange 4 groups or 6 groups of turbulent burners (6).
3. the device according to claim 1 for preventing face-fired boiler side water wall high temperature corrosion, which is characterized in that
The novel burner (5) includes primary wind pipe (15) and secondary air duct (16), and primary wind pipe (15) and Secondary Air
Pipeline (16) is in contact；The section of the primary wind pipe (15) is circular ring shape, and the cross section of the secondary air duct (16) is
Semi-circular shape, secondary air duct (16) is provided with secondary air inlet (53) and middle part forms secondary air channel (56), described secondary
Wind channel (56) is located at the outside of primary wind pipe (15), secondary air channel (56) and left wall water-cooling wall (3) or right wall water-cooling wall
(4) adjacent.
4. the device according to claim 1 or 3 for preventing face-fired boiler side water wall high temperature corrosion, feature exist
In the primary wind pipe (15) is provided with a wind inlet (51) and controllable register (52), and the controllable register (52) is located at
Primary wind pipe (15) is internal, and primary wind pipe (15) is divided into dense First air channel (54) He Danyi by multiple controllable registers (52)
Secondary wind channel (55) separates for realizing First air and the horizontal bias of coal dust mixed gas.
5. the device according to claim 1 or 2 for preventing face-fired boiler side water wall high temperature corrosion, feature exist
In the turbulent burner (6) is HT-NR3 type turbulent burner, CF/SF type turbulent burner or DS type turbulent burner.
6. a kind of device according to any one of claims 1 to 5 for preventing face-fired boiler side water wall high temperature corrosion
Working method, which is characterized in that the working method is as follows:
Step 1: First air and coal dust mixed gas enter primary wind pipe (15) by a wind inlet (51), in multiple adjustings
Horizontal bias separation is realized under the action of baffle (52), is sprayed respectively by dense First air channel (54) and light First air channel (55)
Enter hearth combustion；
Step 2: non-swirl secondary air enters secondary air channel (56) by secondary air inlet (53), and it is combustion-supporting to be injected directly into burner hearth；
Step 3: First air and Secondary Air also enter hearth combustion by the turbulent burner (6) arranged in the middle part of burner hearth；
Step 4: it is logical that dense First air is inhaled with the rotational flow gas volume that the turbulent burner (6) that novel burner (5) is adjacently positioned sprays
The gas that road (54) sprays forms fuel-rich regions (14), the light First air and secondary air channel that light First air channel (55) sprays
(56) non-swirl secondary air sprayed forms left side oxygen-rich area (12) or right side close to left wall water-cooling wall (3) or right wall water-cooling wall (4)
Oxygen-rich area (13), improves the reducing atmosphere of side water wall.
7. the working method of the device according to claim 6 for preventing face-fired boiler side water wall high temperature corrosion,
It is characterized in that, secondary air channel (56) internal flow is non-swirl secondary air, rigidity is strong, and range can reach among side wall
Region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811498220.6A CN109737387B (en) | 2018-12-07 | 2018-12-07 | Device for preventing high-temperature corrosion of side wall water-cooled wall of opposed combustion boiler and working method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811498220.6A CN109737387B (en) | 2018-12-07 | 2018-12-07 | Device for preventing high-temperature corrosion of side wall water-cooled wall of opposed combustion boiler and working method |
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| CN109737387A true CN109737387A (en) | 2019-05-10 |
| CN109737387B CN109737387B (en) | 2023-08-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484021A (en) * | 2020-10-23 | 2021-03-12 | 西安交通大学 | Ultralow-load stable-combustion pre-pyrolysis combustion system and ultralow-load operation method |
| CN113339784A (en) * | 2021-04-29 | 2021-09-03 | 华电电力科学研究院有限公司 | Prevention and control system and method for high-temperature corrosion of water wall of power station boiler |
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| CN113339784A (en) * | 2021-04-29 | 2021-09-03 | 华电电力科学研究院有限公司 | Prevention and control system and method for high-temperature corrosion of water wall of power station boiler |
| CN113339784B (en) * | 2021-04-29 | 2023-03-07 | 华电电力科学研究院有限公司 | Prevention and control system and method for high-temperature corrosion of water wall of power station boiler |
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