CN207094649U - A kind of air-deflector for preventing Opposite Firing Boiler high temperature corrosion - Google Patents
A kind of air-deflector for preventing Opposite Firing Boiler high temperature corrosion Download PDFInfo
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- CN207094649U CN207094649U CN201720990195.8U CN201720990195U CN207094649U CN 207094649 U CN207094649 U CN 207094649U CN 201720990195 U CN201720990195 U CN 201720990195U CN 207094649 U CN207094649 U CN 207094649U
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- air
- blast pipe
- high temperature
- deflector
- burner hearth
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Abstract
The utility model discloses a kind of air-deflector for preventing Opposite Firing Boiler high temperature corrosion; the air-deflector of arrangement is corresponded including being symmetricly set at left and right sides of boiler furnace in the middle part of wall and each burner layer and after-flame stratification of wind with being arranged on boiler furnace front-back wall, the air that described air-deflector can make to enter in burner hearth is in the middle part of the wall of the left and right sides and its both sides form a layer of air diaphragm.The air-deflector of the present utility model for preventing Opposite Firing Boiler high temperature corrosion can effectively prevent the high temperature corrosion of Opposite Firing Boiler both walls, so as to ensure the safe operation of boiler.
Description
Technical field
A kind of air-deflector is the utility model is related to, it is especially a kind of to be used for Opposite Firing Boiler to prevent
The air-deflector of side water wall high temperature corrosion.
Background technology
At present, Opposite Firing Boiler generally use air staged combustion technology controls nitrogen oxides（NOX）'s
Discharge capacity, so-called air classification are exactly that the air capacity needed for boiler combustion is divided into two-stage or multistage first on furnace height direction
It is sent into afterwards in burner hearth, i.e.,：First order air is sent into the furnace height region for being disposed with burner first, the partial air amount is small
In the theoretical air requirement needed for boiler completely burned, the air capacity due to being sent into the region is less than the sky needed for boiler completely burned
Tolerance, so can preferably suppress NO in the regionXGeneration, filled again in the top of burner region by burnout degree afterwards
Put and the residual air capacity being sent into before not at burner region is sent in burner hearth；At burner hearth inner burner region
Initial NOX yields obtained and preferably controlled, so when the burnout degree needed for boiler completely burned is sent to burner hearth
After interior, NOXTotal growing amount can be also advantageously controlled, than not using air staged combustion technology to reduce 30%-50%'s
NOXDischarge capacity.
But due to being sent into the air capacity of burner region less than the air capacity needed for boiler completely burned, it will cause
The anoxycausis in boiler-burner region, burner region anoxycausis will generate H2S, the reducibility gas such as CO, these are also
Originality gas can be mixed in burner hearth high-temperature flue gas and to burner hearth or so side wall flow, cause to side water wall wash away and side
The high temperature corrosion of wall water-cooling wall, especially the high temperature corrosion at left and right side wall central region shows the most serious, and then causes
Water screen tube is thinning and tube bursting and leakage event occurs, and has a strong impact on the security of boiler operatiopn.
Utility model content
Technical problem to be solved in the utility model, which is to provide one kind, prevents Opposite Firing Boiler high temperature corrosion
Air-deflector, the air-deflector can effectively prevent the high temperature corrosion of Opposite Firing Boiler, so as to ensure
The safe operation of boiler.
Technical scheme is used by the utility model solves its technical problem：One kind prevents Opposite Firing Boiler
The air-deflector of high temperature corrosion, the left and right sides wall middle part of the boiler furnace are symmetrically arranged with and are arranged in boiler furnace
Each burner layer and after-flame stratification of wind on front-back wall correspond the air-deflector of arrangement, described air-deflector energy
The air for making to enter in burner hearth is in the middle part of the wall of the left and right sides and its both sides form a layer of air diaphragm.
Further, described air-deflector includes the first blast pipe and the first guide plate that shape is rectangle,
And the cross-sectional sizes of first blast pipe are less than the size of the first guide plate；The afterbody of first blast pipe is connected with bellows,
The front end of first blast pipe is stretched into inside burner hearth and is fixedly connected with burner hearth side wall；The left and right side and top of first blast pipe front end
A rectangular air is had on face and is oriented to breach；Two corners of the first blast pipe front end bottom surface and its top surface are and institute
The first guide plate stated is fixedly connected.
Further, described rectangular air is oriented to breach close to side wall inwall.
Further, the first described guide plate is provided with several the first uniform apertures, and the quantity of the first aperture and
It is sized so as to account for the 5-30% of total air needed for the present apparatus through the air capacity that it enters in burner hearth.
Further, the middle part of the rectangular air guiding breach also passes through one and the integrally formed company of the first blast pipe
Fitting is fixedly connected with the first guide plate.
Further, the first described blast pipe is fixedly connected by welding with burner hearth side wall；Described connector, first
Two corners of blast pipe front end bottom surface and its top surface are fixedly connected by welding with the first guide plate.
Further, it is circular the second blast pipe and the second guide plate that described air-deflector, which includes shape,
And the radius of second blast pipe is less than the radius of the second guide plate；The afterbody of second blast pipe is connected with bellows, and second
The front end of blast pipe is stretched into inside burner hearth and is fixedly connected with burner hearth side wall；Along the circumferential in the second blast pipe of the second blast pipe
Front interval be evenly provided with several arc air and be oriented to breach, and described arc air is oriented to breach in the second blast pipe
It is distributed as in the circumference of front end：Lower vertical distribution and left and right horizontal distribution are presented relative to burner hearth or so side wall；Second blast pipe
Front end be fixedly connected with the second described guide plate.
Further, described arc air is oriented to breach close to side wall inwall.
Further, the second described guide plate is provided with several uniform second orifices, and the quantity of second orifice and
It is sized so as to account for the 5-30% of total air needed for the present apparatus through the air capacity that it enters in burner hearth.
Further, the second described blast pipe is fixedly connected by welding with burner hearth side wall；The front end of second blast pipe
It is fixedly connected by welding with the second guide plate.
The beneficial effects of the utility model are：The sky of the present utility model for preventing Opposite Firing Boiler high temperature corrosion
Gas guider can make air enter burner hearth when be close to left and right side wall move to direction straight up and to the left and right level
Direction is moved, so as to occurring in hearth combustion height region inside wall water-cooling wall in the middle part of the most serious side wall of high temperature corrosion and
Side wall both sides form a layer of air diaphragm, and then make to carry H2S, the high-temperature flue gas of the reducibility gas such as CO can not be with side wall water
Cold wall directly contacts, and reaches the purpose for effectively preventing side water wall from high temperature corrosion occurs, and the layer of air diaphragm is also sharp
In the coking for preventing or mitigating boiler.Simultaneously as into oxygen is contained in the air in burner hearth, so the partial air may be used also
With with H2S, chemical reaction occurs for the reducibility gas such as CO so as to reduce the reducibility gas amount in high-temperature flue gas, reduces high temperature cigarette
The reproducibility of gas, further prevent side water wall from high temperature corrosion occurs.It is in addition, several uniform by being set on guide plate
Aperture, and the quantity of aperture and the 5- for being sized so as to account for total air needed for the present apparatus through the air capacity that it enters in burner hearth
30%, it the air for flowing to blast pipe front end is passed through described aperture to motion in the middle part of burner hearth, so as to be moved to side wall
One reverse resistance of high-temperature flue gas, make the high-temperature flue gas containing reducibility gas be not easy to move to side wall region, Jin Erda
To further preventing side water wall from the purpose of high temperature corrosion occurs, the combustion flame in burner hearth is not interfered with also.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment 1.
Fig. 2 is the structural representation that the air-deflector in embodiment 1 is installed on burner hearth side wall.
Fig. 3 is Fig. 2 sectional view.
Fig. 4 is the structural representation of embodiment 2.
Fig. 5 is the structural representation that the air-deflector in embodiment 2 is installed on burner hearth side wall.
Fig. 6 is Fig. 5 sectional view.
In figure mark for：1- side walls, the blast pipes of 2- first, the guide plates of 3- first, 4- rectangular airs are oriented to breach, 5- first
Aperture, 6- connectors, the blast pipes of 7- second, the guide plates of 8- second, 9- arcs air are oriented to breach, 10- second orifices, 11- combustions
Burner layer, 12- after-flame stratification of winds.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
It is of the present utility model to prevent the air-deflector of Opposite Firing Boiler high temperature corrosion, including be symmetrical arranged
In the middle part of the wall of the Opposite Firing Boiler burner hearth left and right sides and each burner with being arranged on boiler furnace front-back wall
Layer 11 and after-flame stratification of wind 12 correspond the air-deflector of arrangement, and described air-deflector can make to enter in burner hearth
Air is in the middle part of the wall of the left and right sides and its both sides form a layer of air diaphragm.
Embodiment 1
As shown in Figure 1, 2, 3, described air-deflector is led including the first blast pipe 2 and first that shape is rectangle
To plate 3, the cross-sectional sizes of first blast pipe 2 are less than the size of the first guide plate 3；The afterbody and boiler of first blast pipe 2
Bellows（Not shown in figure）It is connected, the front end of the first blast pipe 2 is stretched into inside burner hearth and fixed by welding with burner hearth side wall 1
Connection；A rectangular air is had on the left and right side of the front end of first blast pipe 2 and top surface and is oriented to breach 4, described square
Shape air is oriented to breach 4 close to the inwall of side wall 1；The bottom surface of the front end of first blast pipe 2 and the bottom of first guide plate 3 are neat
It is flat, and the two is fixedly connected by welding；Two corners on the front end top surface of first blast pipe 2 are by welding and described the
One guide plate 3 is fixedly connected.
One kind as above-mentioned technical proposal preferably, it is small to be provided with several uniform first on the first described guide plate 3
Hole 5, and the quantity of the first aperture 5 and be sized so as to through its enter burner hearth in air capacity account for total air needed for the present apparatus
5-30%。
Preferably, the middle part that breach 4 is oriented in the rectangular air also passes through one to another kind as above-mentioned technical proposal
Be fixedly connected with 2 integrally formed connector 6 of the first blast pipe with the first guide plate 3, and described connector 6 by welding with
First guide plate 3 is fixedly connected.
Embodiment 1 by setting a rectangular air to be oriented to respectively on the left and right side of the first blast pipe front end and top surface
Breach, and rectangular air is oriented to breach close to side wall inwall, when air enters the first blast pipe and flows to the first blast pipe
When the rectangular air of front end is oriented to breach, air can leading in the guiding breach on the first blast pipe front end left and right side and top surface
It is close to side water wall under to effect to spread to direction straight up and left and right horizontal direction, so as in side wall middle part surface and side
Wall both sides form a layer of air diaphragm, due to described air-deflector and each burner being arranged on burner hearth front-back wall
Layer and after-flame stratification of wind, which correspond, to be set, i.e. the corresponding one group of air-deflector of one layer of burner, and one layer of burnout degree is corresponding one group
Air-deflector, so can be in high temperature corrosion side wall the most serious occurs for hearth combustion height region inside wall water-cooling wall
Portion and side wall both sides form a layer of air diaphragm, so that carrying H2S, the high-temperature flue gas of the reducibility gas such as CO can not be with side
Wall water-cooling wall directly contacts, and so as to effectively prevent side water wall from high temperature corrosion occurs, and the layer of air diaphragm is also sharp
In the coking for preventing or mitigating boiler；Simultaneously as into oxygen is contained in this partial air in burner hearth, so the part is empty
Gas can also and H2S, chemical reaction occurs for the reducibility gas such as CO so as to reduce the reducibility gas amount in high-temperature flue gas, reduces
The reproducibility of high-temperature flue gas, further prevent side water wall from high temperature corrosion occurs；In addition, by being set on the first guide plate
Several the first uniform apertures, and the quantity of the first aperture and be sized so as to account for burner through the air capacity that it enters in burner hearth
The 5-30% of required total air, it can both make the described aperture of the air warp for flowing to the first blast pipe front end to burner hearth middle part
Motion, so as to one reverse resistance of high-temperature flue gas moved to side wall, be not easy the high-temperature flue gas containing reducibility gas
Side wall region is moved to, and then further prevents side water wall from the purpose of high temperature corrosion occurs, does not interfere with burner hearth also
Interior combustion flame.
Embodiment 2
As shown in Figure 4,5, 6, it is that circular the second blast pipe 7 and second is led that described air-deflector, which includes shape,
To plate 8, the radius of second blast pipe 7 is less than the radius of the second guide plate 8；The afterbody of second blast pipe 7 and boiler bellows
（Not shown in figure）It is connected, the front end of the second blast pipe 7, which is stretched into inside burner hearth and fixed by welding with burner hearth side wall 1, to be connected
Connect；Several arc air, which are evenly provided with, along the circumferential front interval in the second blast pipe 7 of the second blast pipe 7 is oriented to breach
9, and described arc air is oriented to breach 9 and is distributed as in the front end circumference of the second blast pipe 7：Relative to burner hearth or so side wall
1 in vertical distribution up and down and left and right horizontal distribution；Described arc air is oriented to breach 9 close to the inwall of side wall 1；Second blast pipe
7 front end is fixedly connected by welding with the second described guide plate 8.
One kind as above-mentioned technical proposal preferably, it is small to be provided with several uniform second on the second described guide plate 8
Hole 10, and the quantity of second orifice 10 and be sized so as to through its enter burner hearth in air capacity account for total air needed for the present apparatus
5-30%.
Embodiment 2 several is evenly arranged and relatively by being set in the second blast pipe front end along the second blast pipe is circumferentially-spaced
In left and right, side wall presents the arc air guiding breach of lower vertical distribution and left and right horizontal distribution, and arc air is oriented to breach
Close side wall inwall, when the arc air that air enters the second blast pipe and flows to the second blast pipe front end is oriented to breach,
Air can be close to side water wall to direction straight up under the guide effect of the arcuate guide breach of the second blast pipe front end
Spread with left and right horizontal direction, so as to form a layer of air diaphragm in side wall middle part surface and side wall both sides, due to described
Air-deflector and each main burner layer being arranged on burner hearth front-back wall are corresponded and set, i.e. one layer of burner corresponding one
Group air-deflector, so high temperature corrosion side wall the most serious can occur in hearth combustion height region inside wall water-cooling wall
Middle part and side wall both sides form a layer of air diaphragm, so that carrying H2S, the high-temperature flue gas of the reducibility gas such as CO can not be with
Side water wall directly contacts, and so as to effectively prevent side water wall from high temperature corrosion occurs, and the layer of air diaphragm is also
Beneficial to the coking for preventing or mitigating boiler；Simultaneously as into oxygen is contained in this partial air in burner hearth, so the part
Air can also and H2S, chemical reaction occurs for the reducibility gas such as CO so as to reduce the reducibility gas amount in high-temperature flue gas, drops
The reproducibility of low high-temperature flue gas, further prevent side water wall from high temperature corrosion occurs；In addition, by being set on the second guide plate
Put several uniform second orifices, and the quantity of second orifice and be sized so as to account for this dress through the air capacity that it enters in burner hearth
The 5-30% of total air needed for putting, it can both make the described aperture of the air warp for flowing to the second blast pipe front end into burner hearth
Portion moves, so as to one reverse resistance of high-temperature flue gas moved to side wall, not allow the high-temperature flue gas containing reducibility gas
Side wall region easily is moved to, and then further prevents side water wall from the purpose of high temperature corrosion occurs, does not interfere with stove also
Combustion flame in thorax.
In summary, the air-deflector of the present utility model for preventing Opposite Firing Boiler high temperature corrosion can be with
Make air be close to left and right side wall when entering burner hearth move to direction straight up and horizontal motion to the left and right, so that
Hearth combustion height region inside wall water-cooling wall occurs in the middle part of high temperature corrosion side wall the most serious and side wall both sides form one
Layer of air diaphragm, and then make to carry H2S, the high-temperature flue gas of the reducibility gas such as CO can not directly contact with side water wall,
Reach the purpose for effectively preventing side water wall from high temperature corrosion occurs, and the layer of air diaphragm is additionally favorable for preventing or mitigating pot
The coking of stove.Simultaneously as into containing oxygen in the air in burner hearth, thus the partial air can also and H2S, CO etc. is gone back
Chemical reaction occurs for originality gas so as to reduce the reducibility gas amount in high-temperature flue gas, reduces the reproducibility of high-temperature flue gas, enters
One step prevents side water wall from high temperature corrosion occurs.In addition, by setting several uniform apertures on guide plate, and aperture
Quantity and the 5-30% for being sized so as to account for total air needed for the present apparatus through the air capacity that it enters in burner hearth, can both make stream
Move in the middle part of to the described aperture of the air warp of blast pipe front end to burner hearth and move, so as to the high-temperature flue gas one moved to side wall
Reverse resistance, make the high-temperature flue gas containing reducibility gas be not easy to move to side wall region, and then further prevent side
The purpose of high temperature corrosion occurs for wall water-cooling wall, does not interfere with the combustion flame in burner hearth also.
It should be appreciated that above-mentioned embodiment of the present utility model is used only for exemplary illustration or explains this reality
With new principle, without forming to limitation of the present utility model.Therefore, without departing from spirit and scope of the present utility model
In the case of made any modification, equivalent substitution etc., should be included within the scope of protection of the utility model.
Claims (10)
- A kind of 1. air-deflector for preventing Opposite Firing Boiler high temperature corrosion, it is characterised in that：The Boiler Furnace The left and right sides wall of thorax（1）Middle part is symmetrically arranged with and is arranged in each burner layer on boiler furnace front-back wall（11）And after-flame Stratification of wind（12）The air-deflector of arrangement is corresponded, the air that described air-deflector can make to enter in burner hearth is on a left side Right both walls（1）Middle part and its both sides form a layer of air diaphragm.
- 2. the air-deflector according to claim 1 for preventing Opposite Firing Boiler high temperature corrosion, its feature It is：Described air-deflector includes the first blast pipe that shape is rectangle（2）With the first guide plate（3）, and it is described First blast pipe（2）Cross-sectional sizes be less than the first guide plate（3）Size；First blast pipe（2）Afterbody be connected with bellows It is logical, the first blast pipe（2）Front end stretch into inside burner hearth and with burner hearth side wall（1）It is fixedly connected；First blast pipe（2）Front end A rectangular air is had on left and right side and top surface and is oriented to breach（4）；First blast pipe（2）Front end bottom surface and its top Two corners in face with the first described guide plate（3）It is fixedly connected.
- 3. the air-deflector according to claim 2 for preventing Opposite Firing Boiler high temperature corrosion, its feature It is：Described rectangular air is oriented to breach（4）Close to side wall（1）Inwall.
- 4. the air-deflector according to claim 3 for preventing Opposite Firing Boiler high temperature corrosion, its feature It is：The first described guide plate（3）It is provided with several the first uniform apertures（5）, and the first aperture（5）Quantity and size It is designed as accounting for the 5-30% of total air needed for the present apparatus through the air capacity that it enters in burner hearth.
- 5. the air-deflector according to claim 4 for preventing Opposite Firing Boiler high temperature corrosion, its feature It is：The rectangular air is oriented to breach（4）Middle part also pass through one and the first blast pipe（2）Integrally formed connector （6）With the first guide plate（3）It is fixedly connected.
- 6. the air-deflector according to claim 5 for preventing Opposite Firing Boiler high temperature corrosion, its feature It is：The first described blast pipe（2）Pass through welding and burner hearth side wall（1）It is fixedly connected；Described connector（6）, first enter Airduct（2）Two corners of front end bottom surface and its top surface pass through welding and the first guide plate（3）It is fixedly connected.
- 7. the air-deflector according to claim 6 for preventing Opposite Firing Boiler high temperature corrosion, its feature It is：It is the second circular blast pipe that described air-deflector, which includes shape,（7）With the second guide plate（8）, and it is described Second blast pipe（7）Radius be less than the second guide plate（8）Radius；Second blast pipe（7）Afterbody be connected with bellows, Two blast pipes（7）Front end stretch into inside burner hearth and with burner hearth side wall（1）It is fixedly connected；Along the second blast pipe（7）Circumference In the second blast pipe（7）Front interval be evenly provided with several arc air and be oriented to breach（9）, and described arc air is led To breach（9）In the second blast pipe（7）It is distributed as in the circumference of front end：Relative to burner hearth or so side wall（1）In vertical point up and down Cloth and left and right horizontal distribution；Second blast pipe（7）Front end and described the second guide plate（8）It is fixedly connected.
- 8. the air-deflector according to claim 7 for preventing Opposite Firing Boiler high temperature corrosion, its feature It is：Described arc air is oriented to breach（9）Close to side wall（1）Inwall.
- 9. the air-deflector according to claim 8 for preventing Opposite Firing Boiler high temperature corrosion, its feature It is：The second described guide plate（8）It is provided with several uniform second orifices（10）, and second orifice（10）Quantity and big The small 5-30% for being designed as accounting for total air needed for the present apparatus through the air capacity that it enters in burner hearth.
- 10. the air-deflector according to claim 9 for preventing Opposite Firing Boiler high temperature corrosion, its feature It is：The second described blast pipe（7）Pass through welding and burner hearth side wall（1）It is fixedly connected；Second blast pipe（7）Front end pass through Welding and the second guide plate（8）It is fixedly connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720990195.8U CN207094649U (en) | 2017-08-09 | 2017-08-09 | A kind of air-deflector for preventing Opposite Firing Boiler high temperature corrosion |
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| CN201720990195.8U CN207094649U (en) | 2017-08-09 | 2017-08-09 | A kind of air-deflector for preventing Opposite Firing Boiler high temperature corrosion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458631A (en) * | 2018-11-15 | 2019-03-12 | 华电电力科学研究院有限公司 | A kind of adherent wind system preventing tangentially-fired boiler water wall high temperature corrosion and its working method |
-
2017
- 2017-08-09 CN CN201720990195.8U patent/CN207094649U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458631A (en) * | 2018-11-15 | 2019-03-12 | 华电电力科学研究院有限公司 | A kind of adherent wind system preventing tangentially-fired boiler water wall high temperature corrosion and its working method |
| CN109458631B (en) * | 2018-11-15 | 2024-02-27 | 华电电力科学研究院有限公司 | Wall-attached air system and method for preventing high-temperature corrosion of water-cooled wall of tetragonal tangential boiler |
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