CN220817800U - Anti-burning cooling air system of plasma burner of opposed firing boiler - Google Patents
Anti-burning cooling air system of plasma burner of opposed firing boiler Download PDFInfo
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- CN220817800U CN220817800U CN202322303722.1U CN202322303722U CN220817800U CN 220817800 U CN220817800 U CN 220817800U CN 202322303722 U CN202322303722 U CN 202322303722U CN 220817800 U CN220817800 U CN 220817800U
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- 238000001816 cooling Methods 0.000 title claims abstract description 103
- 238000010304 firing Methods 0.000 title claims abstract description 16
- 230000002265 prevention Effects 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims description 32
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 241001330002 Bambuseae Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000013021 overheating Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 43
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 11
- 239000000446 fuel Substances 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Abstract
The utility model belongs to the technical field of boiler burner cooling, and discloses an anti-burning cooling air system of a plasma burner of a opposed firing boiler. The plasma burner burning loss prevention cooling air system of the opposed firing boiler is characterized in that the plasma burner is arranged on the boiler and comprises a secondary air box shell, and a secondary air clamping cylinder of the plasma burner is arranged in the secondary air box shell; the cooling wind system includes: the air distributor is provided with an arc-shaped structure, the arc-shaped structure is fixedly connected with the outer wall of the secondary air clamping cylinder, the air distributor is hollow, and the air distributor is communicated with the secondary air clamping cylinder; and the cooling air branch pipe is hollow, one end of the cooling air branch pipe is connected with one end of the air distributor, which is far away from the secondary air clamping cylinder, and the other end of the cooling air branch pipe is connected with the cooling air main pipe. According to the utility model, the primary air in the main cooling air pipe is introduced into the secondary air cylinder, and the plasma burner is fully cooled, so that the overheating problem of the plasma burner is effectively avoided.
Description
Technical Field
The utility model belongs to the technical field of boiler burner cooling, and particularly relates to an anti-burning cooling air system of a plasma burner of a opposed firing boiler.
Background
A flushable combustion boiler is a common type of boiler that injects fuel and air into a furnace in a flushable manner through a plurality of burner nozzles such that the fuel and air form a swirling flow within the furnace. The boiler can increase the uniformity of combustion, improve the combustion efficiency and the combustion stability, can adjust the air flow distribution in a hearth by controlling the angle and the speed of a nozzle, effectively control the temperature distribution in the furnace, and reduce the generation of pollutants such as nitrogen oxides (NOx), carbon monoxide (CO) and the like generated by combustion.
The conventional coal-fired power generation unit opposite-firing boiler is generally provided with a plurality of layers of burner groups, referring to fig. 1, the front wall and the rear wall of the boiler are provided with a layer A, a layer B, a layer C, a layer D, a layer E and a layer F which are opposite to each other, and each layer of burner group is provided with five relatively independent burners so as to realize full combustion of fuel in a combustion chamber, improve the fuel utilization efficiency, reduce the emission of pollutants and achieve the purposes of energy conservation and environmental protection. A plasma burner is a device that utilizes plasma technology to achieve combustion, with the significant advantage of enhancing the rate and efficiency of the combustion reaction. The plasma burner is used as a burner for starting a boiler and a burner for peak shaving of a standby layer of a unit, and is generally arranged at the lowest layer or the next lower layer of the boiler in the boiler, hot air and cooling air required by combustion are provided by hot secondary air at an outlet of an air preheater, and the pressure head of the secondary air is generally about 0.7kpa, so that the actual requirements on site are met under ideal conditions. However, the existing coal motor group is affected by market conditions of coal, the mixing ratio is heavy, the ash content is high, the sulfur content is high, coking phenomenon exists after combustion, along with the lengthening of the operation period, secondary air pressure difference is high after the air preheater is blocked, secondary air carries flue fly ash to enter a secondary air box and a burner, and in addition, the burner arrangement position and the long-term standby reasons are adopted, in order to ensure the boiler combustion and the control of generating nitrogen oxides in actual boiler operation, the opening degree of a secondary air valve in a D layer area is smaller, the secondary air pressure head is lower, the cooling requirements of a D2 burner, a D3 burner and a D4 burner in the D layer area cannot be met, and the problem that the burner fails due to insufficient cooling for multiple times occurs. Specifically, on one hand, the primary air nozzle and the air duct deform to cause coking and pulverized coal combustion, so that the burner has the problem of burning loss and scrapping; on the other hand, the burn-out and drop combustor expander is easy to smash and damage the cold ash bucket water-cooling wall, so that the water-cooling wall leaks the machine set to be non-stop, and certain hidden trouble is brought to the safe and stable operation of the machine set.
In order to prevent frequent burning loss of the plasma burner of the opposed firing boiler, it is highly desirable to provide a cooling air system for preventing burning loss of the plasma burner of the opposed firing boiler, which can effectively prevent the burning loss and deformation of the plasma burner arranged on the layer D
In view of this, the present utility model has been made.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art and provide a burning-loss-preventing cooling air system for a plasma burner of a flushing combustion boiler, which has a simple structure and can effectively cool the plasma burner.
In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that: the utility model provides a cooling air system is prevented burning loss by plasma burner of opposed firing boiler, is provided with the plasma burner on the water-cooled wall of boiler, the boiler includes the overgrate air case casing, the double-layered overgrate air section of thick bamboo of plasma burner sets up in the overgrate air case casing;
The cooling wind system includes:
The air distributor is provided with an arc-shaped structure, the arc-shaped structure is fixedly connected with the outer wall of the secondary air clamping cylinder, the air distributor is hollow, and the air distributor is communicated with the secondary air clamping cylinder;
the cooling air branch pipe is hollow, one end of the cooling air branch pipe is connected with one end of the air distributor, which is far away from the secondary air clamping cylinder, and the other end of the cooling air branch pipe is connected with the cooling air main pipe.
According to one embodiment of the utility model, the cooling air branch pipe is provided with an expansion joint, and the expansion joint is a structural member made of metal materials.
According to one embodiment of the utility model, a secondary air duct is arranged in the secondary air clamping cylinder;
And the cooling air branch pipe is also provided with a regulating air door, and the regulating air door is used for regulating the air quantity of the primary air injected into the secondary air channel through the cooling air main pipe.
According to an embodiment of the utility model, the damper is arranged between the expansion joint and the main cooling air pipe.
According to an embodiment of the utility model, the cooling air main pipe is provided with a pressure gauge and a control valve.
According to an embodiment of the present utility model, the cooling air main pipe is communicated with a primary air pipe;
The cooling air branch pipes are provided with a plurality of cooling air branch pipes, and the cooling air branch pipes are respectively communicated with the cooling air main pipe.
By adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects.
(1) According to the utility model, by arranging the burning loss prevention cooling air system, primary air in the cooling air main pipe is introduced into the secondary air cylinder, and the plasma burner is sufficiently cooled, so that the overheating problem of the plasma burner is effectively avoided;
(2) According to the utility model, the expansion joint is arranged to compensate the axial deviation of the fixed ends of the two pipelines due to the temperature difference, so that the service life of the equipment is prevented.
The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:
FIG. 1 is a schematic view of a boiler-mounted multi-layer burner in accordance with the background of the utility model;
FIG. 2 is a schematic cross-sectional view of an anti-burnout cooling air system according to an embodiment of the present utility model;
FIG. 3 is a schematic side view of a burnout prevention cooling air system according to an embodiment of the present utility model.
The main elements in the figure are illustrated:
1. a boiler; 11. a boiler rear wall; 2. a plasma burner; 21. a burner spout; 3. an air distributor; 31. an air inlet; 32. a damper; 33. a cooling air branch pipe; 34. a cooling air main pipe; 35. an expansion joint; 36. a control valve; 4. clamping a secondary air cylinder; 5. a secondary air box shell; 51. an upper housing; 52. a lower housing; 53. clamping a secondary air duct; 6. a damper pull rod; 7. a pressure gauge; 8. and (5) adjusting the air door.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, one or more layers of corresponding burner groups are respectively arranged on the front water-cooled wall surface and the rear water-cooled wall surface of the boiler 1, three layers of corresponding burner groups are respectively arranged on the front water-cooled wall surface and the rear water-cooled wall surface of the boiler 1, specifically, in fig. 1, an A layer, a B layer and a C layer burner group are arranged on the front water-cooled wall side (the upper left direction of fig. 1) of the boiler, and a D layer, an E layer and an F layer burner group are arranged on the rear water-cooled wall side (the lower right direction of fig. 1) of the boiler. The A-layer burner group (the sight shielding is not marked in the figure 1) corresponds to the D-layer burner group in position front and back and is the same in horizontal height; the B-layer burner group corresponds to the E-layer burner group in front and back in position and is the same in horizontal height; the C-layer burner group corresponds to the F-layer burner group in front and back in position and is the same in horizontal height. Each burner group comprises five burners, taking a D-layer burner as an example: the D-layer burner group includes a D1 burner, a D2 burner, a D3 burner, a D4 burner, and a D5 burner.
The D-layer burner set is generally arranged at the lowest layer or the secondary lower layer of the boiler in the boiler, hot air and cooling air required by combustion are provided by hot secondary air at an outlet of an air preheater, in actual use, coking phenomenon exists after combustion due to common coal mixing conditions, secondary air pressure difference is high after the air preheater is blocked along with lengthening of an operation period, secondary air carries flue fly ash to enter a secondary air box and a burner, and in addition, the arrangement position of the burner and the reason of long-term standby are adopted, in order to ensure the boiler combustion and the control of generating nitrogen oxides, the opening degree of a secondary air door in a D-layer area is smaller, the secondary air pressure head is lower, and the cooling requirements of a D2 burner, a D3 burner and a D4 burner (a burner in the middle of the D1 burner and the D5 burner) in the D-layer area cannot be met.
According to the actual burning condition and inspection analysis of the plasma burner 2, the cause of the problem is mainly caused by insufficient cooling and over-temperature, and in order to ensure the long-term standby reliability of the burner, the air quantity of the burning part is planned to be increased, so that the flow velocity is increased, and the cooling effect is further achieved. According to the actual situation of the site, under the condition that the running operation mode is unchanged, a path of cooling air is independently led from a main cooling air pipe 34 (primary air main pipe) to the vicinity of the D-layer burner (namely D2, D3 and D4 burners), a special burner air distributor 3 is processed to be connected into a burner clamping secondary air channel 53, an air door 32 of the primary burner interlayer secondary air is blocked, the air quantity is adjusted through an external air door 8, the air supply state of high-speed small air quantity is achieved, and the cooling of the burner is realized on the basis of not affecting the combustion in a chamber.
Specifically, as shown in fig. 1 to 3, in the anti-burning cooling air system for the plasma burner of the opposed firing boiler, a plasma burner 2 (burner) is arranged on a water cooling wall of the boiler 1, the boiler 1 comprises a secondary air box shell 5, and a secondary air cylinder 4 of the plasma burner 2 is arranged in the secondary air box shell 5;
The cooling wind system includes:
The air distributor 3 is provided with an arc-shaped structure, the arc-shaped structure is fixedly connected with the outer wall of the secondary air clamping cylinder 4, the air distributor 3 is hollow, and the air distributor 3 is communicated with the secondary air clamping cylinder 4;
The cooling air branch pipe 33, the inside cavity of cooling air branch pipe 33, the one end of cooling air branch pipe 33 with the one end that air distributor 3 kept away from press from both sides secondary air section of thick bamboo 4 is connected, the other end of cooling air branch pipe 33 is connected with cooling air main pipe 34.
In the utility model, by arranging the burning loss prevention cooling air system, primary air in the cooling air main pipe 34 is introduced into the secondary air cylinder 4, and the plasma burner 2 is fully cooled, so that the overheating problem is effectively avoided.
In a specific implementation of this example, referring to fig. 1, the layer a burner, the layer B burner and the layer C burner are disposed on the front wall (front water-cooled wall) of the boiler from bottom to top, and the layer D burner, the layer E burner and the layer F burner are disposed on the rear wall 11 (rear water-cooled wall) of the boiler from bottom to top.
In a specific implementation manner of this embodiment, referring to fig. 2 and 3, the secondary air box housing 5 includes an upper housing 51 and a lower housing 52, and the cooling air branch pipe 33 is fixedly connected with the secondary air cylinder 4 through the lower housing 52.
In a specific implementation of this embodiment, referring to fig. 2, a burner nozzle 21 is connected to a side of the secondary air cylinder 4 of the plasma burner 2 (burner) away from the air distributor 3.
In a specific implementation manner of this embodiment, referring to fig. 2 and fig. 3, the air distributor 3 has a substantially Y shape. The inner side of the arc-shaped structure is the same as the outer side radian of the wall of the first air duct 4, the arc-shaped structure is welded with the outer wall of the first air duct 4, and the height of a welding seam is not less than 8mm.
The meaning of the height of the welding seam is not less than a certain specific value, so that the quality, the strength, the reliability and the corrosion resistance of the welding joint are ensured. This helps to avoid component failure, improves weld quality control, and meets visibility and aesthetic requirements.
Primary air in a boiler of a thermal power plant is also called coal supply air, and refers to air inlet for feeding air into a hearth; the secondary air is air inlet which mixes the smoke generated by combustion with a certain amount of fresh air to reduce the temperature of the smoke. The primary air and the secondary air play different roles in the combustion process of the boiler, the primary air provides oxygen and combustion temperature required by combustion, and the secondary air helps to remove smoke, reduce the temperature of the smoke and improve the energy utilization efficiency. Through using the primary air as the compensation to the secondary air for the cooling effect to the combustor is better, avoids appearing the condition of combustor overtemperature.
In another implementation manner of this embodiment, a separate cooling fan (not shown in the figure) may be added to replace the primary air duct (not shown in the figure) as the cooling air source.
The secondary air cylinder 4 of the burner refers to a channel or means in the burner for supplying oxygen required for combustion. It is typically a conduit that directs air into the burner interior, mixes with fuel and performs the combustion reaction. By adjusting the air inflow and the speed of the secondary air cylinder, the parameters such as fuel combustion efficiency, temperature, oxidation state and the like in the combustion process can be controlled. The secondary air cylinder plays an important auxiliary oxygen supply role in the burner, so that the combustion reaction can be ensured to be normally carried out.
In a specific implementation manner of this embodiment, referring to fig. 2, a damper pull rod 6 is further disposed on the burner, and the damper pull rod 6 is configured to control the opening degree of a damper of the burner, so as to adjust the air flow required during combustion, so as to ensure good combustion effect and stable combustion. The damper lever is typically made of metal and controls the damper by interfacing with the damper mechanism. Operating the damper pull rod can change the position of the damper, thereby changing the amount of air entering the burner.
In a specific implementation manner of this embodiment, an air inlet 31 and an air door 32 disposed on the air inlet 31 are disposed in the secondary air cylinder 4, and the opening of the air door 32 is adjusted to control the air intake and control the combustion intensity.
In one embodiment of the present embodiment, the damper 32 (secondary air drum damper) is fully welded, and the height of the weld is not less than 8mm.
In a specific implementation manner of this embodiment, the cooling air branch pipe 33 is provided with an expansion joint 35, and the expansion joint 35 is a metal structural member.
In the utility model, by arranging the expansion joint 35, the axial deviation of the fixed ends of the two pipelines due to the temperature difference is effectively compensated, and the damage of equipment is prevented.
In a specific implementation manner of this embodiment, the expansion joint 35 is in a capsule shape, and when the pipes connected at two ends of the expansion joint axially move, the capsule-shaped structure is stretched to compensate the axial displacement.
In a specific implementation manner of this embodiment, a secondary air duct 53 is disposed in the secondary air cylinder 4;
The cooling air branch pipe 33 is further provided with a damper 8, and the damper 8 is used for adjusting the air volume of the primary air injected into the secondary air channel 53 through the cooling air main pipe 34.
In a specific implementation of this embodiment, referring to fig. 2 and 3, the damper 8 is disposed between the expansion joint 35 and the cooling air main pipe 34.
In a specific implementation manner of this embodiment, the main cooling air pipe 34 is provided with a pressure gauge 7 and a control valve 36.
Specifically, the scheme for introducing secondary air into the secondary air clamping cylinder to prevent the burning loss of the plasma burner 2 is as follows: leading the cooling air main pipe 34 from the primary air fan outletTo the vicinity of the burner, the cooling air branch pipe 33/>The air door 32 of the secondary air channel 53 is connected with the air distributor 3 by being connected to the D2\D3\D4 burner (because D1\D5 is close to the secondary air door for cooling to meet the requirement, no additional installation is needed), the opening of the secondary air door 32 of the cutting clamp is 300mm in square opening size width of the air distributor 3, 1161mm in arc length and the same radian, the air distributor 3 is fully welded on the wall of the secondary air channel of the burner clamp, primary air uniformly enters the secondary air channel 53, and meanwhile, a control valve 36 (DN 400 manual butterfly valve) is arranged on a main cooling air pipe 34, and a cooling air branch pipe is formedThe damper 8 (DN 300 adjustable manual damper) is installed on the upper part (80% -90% of the opening degree according to the calculated operation condition of the burner, 30% -40% of the stopping opening degree of the burner), and simultaneously, in order to prevent the influence on the expansion of the boiler, the expansion joint 35 (metal compensator/>) is installed according to the expansion amount of the boiler)。
According to an embodiment of the present utility model, referring to fig. 2 and 3, the main cooling air pipe 34 is in communication with a primary air duct (not shown); the primary air pipeline is a pipeline for supplying primary air to the boiler in the original direction;
The cooling air branch pipes 33 are provided in plural, and the cooling air branch pipes 33 are each in communication with the cooling air main pipe 34. And the cooling air is introduced into the corresponding second air duct 4 by controlling the air damper 8 on the corresponding cooling air branch pipe 33, so that the cooling effect on the corresponding plasma heater 2 is achieved.
The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited to the above-mentioned embodiment, but is not limited to the above-mentioned embodiment, and any simple modification, equivalent change and modification made by the technical matter of the present utility model can be further combined or replaced by the equivalent embodiment without departing from the scope of the technical solution of the present utility model.
Claims (6)
1. The anti-burning cooling air system for the plasma burner of the opposed firing boiler is characterized in that a plasma burner (2) is arranged on a water cooling wall of the boiler (1), the boiler (1) comprises a secondary air box shell (5), and a secondary air cylinder (4) for clamping the plasma burner (2) is arranged in the secondary air box shell (5);
The cooling wind system includes:
the air distribution device (3) is provided with an arc-shaped structure, the arc-shaped structure is fixedly connected with the outer wall of the secondary air clamping cylinder (4), the air distribution device (3) is hollow, and the air distribution device (3) is communicated with the secondary air clamping cylinder (4);
The cooling air branch pipe (33), the inside cavity of cooling air branch pipe (33), the one end of cooling air branch pipe (33) with the one end that presss from both sides overgrate air section of thick bamboo (4) is kept away from in air distributor (3), the other end of cooling air branch pipe (33) is connected with cooling air main pipe (34).
2. The plasma burner burning loss prevention cooling air system of the opposed firing boiler according to claim 1, wherein an expansion joint (35) is arranged on the cooling air branch pipe (33), and the expansion joint (35) is a metal structural member.
3. The plasma burner burning loss prevention cooling air system of the opposed firing boiler according to claim 2, wherein a secondary air duct (53) is arranged in the secondary air cylinder (4);
a regulating air door (8) is further arranged on the cooling air branch pipe (33), and the regulating air door (8) is used for regulating the air quantity of primary air injected into the secondary air channel (53) through the cooling air main pipe (34).
4. A plasma burner burnout prevention cooling air system of a opposed firing boiler according to claim 3, characterized in that the damper (8) is arranged between the expansion joint (35) and the cooling air main pipe (34).
5. A combustion loss prevention cooling air system for a plasma burner of a opposed firing boiler according to any of the claims 1-4, characterized in that the main cooling air pipe (34) is provided with a pressure gauge (7) and a control valve (36).
6. A combustion-loss prevention cooling air system of a plasma burner of an opposed firing boiler according to any one of claims 1 to 4, wherein the main cooling air pipe (34) is in communication with a primary air pipe;
The cooling air branch pipes (33) are provided with a plurality of cooling air branch pipes (33), and the plurality of cooling air branch pipes (33) are respectively communicated with the cooling air main pipe (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322303722.1U CN220817800U (en) | 2023-08-25 | 2023-08-25 | Anti-burning cooling air system of plasma burner of opposed firing boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322303722.1U CN220817800U (en) | 2023-08-25 | 2023-08-25 | Anti-burning cooling air system of plasma burner of opposed firing boiler |
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| Publication Number | Publication Date |
|---|---|
| CN220817800U true CN220817800U (en) | 2024-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322303722.1U Active CN220817800U (en) | 2023-08-25 | 2023-08-25 | Anti-burning cooling air system of plasma burner of opposed firing boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220817800U (en) |
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2023
- 2023-08-25 CN CN202322303722.1U patent/CN220817800U/en active Active
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