CN210241551U - Four corners circle of contact subassembly of variable circle of contact - Google Patents
Four corners circle of contact subassembly of variable circle of contact Download PDFInfo
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- CN210241551U CN210241551U CN201920496481.8U CN201920496481U CN210241551U CN 210241551 U CN210241551 U CN 210241551U CN 201920496481 U CN201920496481 U CN 201920496481U CN 210241551 U CN210241551 U CN 210241551U
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Abstract
The utility model relates to a four corners tangential circle subassembly of variable tangential circle belongs to power station boiler combustor field. The utility model discloses an install the combustor spout on the water-cooling wall, its structural feature lies in: the burner nozzle is controlled to swing up and down so as to adjust the height of the flame center, adjust the temperature of main steam of a boiler and adjust the temperature of reheat steam in the operation process, and the burner nozzle is controlled to swing left and right so that pulverized coal forms a tangent circle after entering a hearth through an air-powder pipeline, the diameter of the tangent circle is changed, and the burner nozzle is adapted to an actuating mechanism for actual coal burning, and is connected with the actuating mechanism. The size of the tangent circle is changed according to different coal quality, so that the application range of the boiler coal can be wider. The air distribution can be adjusted more flexibly. The fuel burnout degree can be increased, and the ash proportion can be effectively changed. Reduce the risk of brushing the wall of fuel, reduce the heating surface wearing and tearing.
Description
Technical Field
The utility model relates to a four corners tangential circle subassembly of variable tangential circle belongs to power station boiler combustor field.
Background
The power station boiler burners can be classified into a direct-flow burner and a cyclone burner according to the characteristics of outlet airflow. The straight-flow burners are usually arranged at four corners of the hearth 3, the geometric axis of the burner outlet airflow at each corner is tangent to an imaginary circle 1 at the center of the hearth, so that the airflow 2 is strongly rotated in the hearth 3, and the combustion mode is called as a four-corner tangential circle combustion mode. (as shown in fig. 1).
In China, the fuel for power station boilers is mainly coal, but the coal is various, and the fuel is used from high-moisture lignite, high-ash-content poor-quality bituminous coal and bituminous coal to low-volatile poor coal and low-volatile anthracite coal. Therefore, before designing the power station boiler burner, firstly, the coal used for boiler combustion is analyzed, and design parameters such as the width, the depth, the section thermal load and the like of a corresponding hearth are selected according to the coal quality, so that the size of the tangent circle diameter of the burner is determined.
Current mainstream quadrangle tangential burner for NO suppressionXThe low-nitrogen burner concept such as top-burning over-air is added (as shown in fig. 2). The new overfire air can swing left and right, up and down to achieve the design purpose, so the size of the tangent circle of the overfire air area can be adjusted at any time (as shown in figure 3). The nozzles in the main burner area are all fixed or can only swing up and down at present, and the size of the tangent circle is fixed.
At present, the regional combustion adjustment of a main burner is mainly adjusted by means of nozzle up-and-down swinging, secondary air proportioning and the like, and the adjusting capability is limited.
The four-corner tangential burner has good coal type adaptability, but has a limit. Along with the change of coal markets, the price of raw coal rises, the difference between purchased coal quality parameters and designed coal quality of a power plant is larger and larger in order to save cost, the inherent arrangement and tangent circle size of a burner cannot adapt to the actual coal quality for burning, and a series of consequences of influencing the safe and stable economic operation of a unit, such as furnace coking, substandard thermal parameters, high exhaust gas temperature, large carbon content of ash slag and the like are brought.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a four corners tangential circle subassembly of variable tangential circle that structural design is reasonable to solve a series of problems that the coal quality change is brought greatly.
The utility model provides a technical scheme that above-mentioned problem adopted is: this four corners tangential subassembly of variable tangential, including installing the combustor spout on the water-cooling wall, its structural feature lies in: the burner nozzle is controlled to swing up and down so as to adjust the height of the flame center, adjust the temperature of main steam of a boiler and adjust the temperature of reheat steam in the operation process, and the burner nozzle is controlled to swing left and right so that pulverized coal forms a tangent circle after entering a hearth through an air-powder pipeline, the diameter of the tangent circle is changed, and the burner nozzle is adapted to an actuating mechanism for actual coal burning, and is connected with the actuating mechanism.
Further, the up-and-down swinging angle of the burner nozzle is 0-30 degrees.
Furthermore, the left and right swinging angle of the burner nozzle is 0-5 degrees.
Further, when the burner nozzle is adjusted to swing left and right, every 1 ° is a first gear.
Furthermore, the number of the air powder pipelines is multiple, and the multiple air powder pipelines are uniformly arranged on the outer side of the hearth.
Further, the number of the burner nozzles is multiple, and the multiple burner nozzles are uniformly arranged on the outer side of the hearth.
Further, each burner port corresponds to an actuator.
Further, the water-cooled wall is positioned in the hearth.
Compared with the prior art, the utility model has the advantages of it is following: the size of the tangent circle is changed according to different coal quality, so that the application range of the boiler coal can be wider. The air distribution can be adjusted more flexibly. The fuel burnout degree can be increased, and the ash proportion can be effectively changed. Reduce the risk of brushing the wall of fuel, reduce the heating surface wearing and tearing.
Drawings
FIG. 1 is a top view of a prior art corner-cut circular burner.
FIG. 2 is a side view of a prior art low NOx burner system.
FIG. 3 is a top view of over-fired air in a prior art low-nitrogen burner system.
Fig. 4 is a diagram of a burner arrangement according to an embodiment of the present invention.
Fig. 5 is a schematic side view of the embodiment of the present invention in the form of a truncated cone with four tangential corners.
Fig. 6 is a schematic side view of a square tangent tower in the embodiment of the present invention.
In the figure: the device comprises a burner nozzle 1, an actuating mechanism 2, an air-powder pipeline 3, a water-cooled wall 4 and a hearth 5.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 4 to 6, it should be understood that the structures, ratios, sizes, etc. shown in the drawings attached to the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essence, and any modification of the structures, changes of the ratio relationship, or adjustment of the sizes should still fall within the scope that the technical contents disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, in the present specification, if the terms such as "upper", "lower", "left", "right", "middle" and "one" are used, they are not intended to limit the scope of the present invention, but to limit the relative relationship between the terms and the terms, and the scope of the present invention is not to be considered as the scope of the present invention.
The four-corner tangential component with the variable tangential circle comprises a burner nozzle 1 arranged on a water-cooled wall 4 and is used for controlling the burner nozzle 1 to swing up and down so as to adjust the height of a flame center, adjust the temperature of main steam of a boiler and adjust the temperature of reheat steam in the operation process, and control the burner nozzle 1 to swing left and right so as to enable pulverized coal to form a tangential circle after entering a hearth 5 through an air-powder pipeline 3, so as to change the diameter of the tangential circle and further adapt to an actuating mechanism 2 for actual coal burning, wherein the burner nozzle 1 is connected with the actuating mechanism 2, and the water-cooled wall 4 is positioned in the hearth 5.
In the embodiment, the up-and-down swinging angle of the burner nozzle 1 is 0-30 degrees, the left-and-right swinging angle of the burner nozzle 1 is 0-5 degrees, and when the burner nozzle 1 is adjusted to swing left and right, 1 degree is a first gear 1.
The number of the air powder pipelines 3 in this embodiment is multiple, the multiple air powder pipelines 3 are uniformly arranged on the outer side of the hearth 5, the number of the burner nozzles 1 is multiple, the multiple burner nozzles 1 are uniformly arranged on the outer side of the hearth 5, and each burner nozzle 1 corresponds to one actuator 2.
In this embodiment, the burner ports 1 in the main burner region are designed to be arranged in a manner similar to the overfire air ports, and to swing left and right.
In this embodiment, for example, a five-layer burner arrangement is adopted, the middle third layer maintains a substantially tangent circle size, and the upper and lower four-layer burners can swing left and right to form a large-top-small-bottom (inverted tower type, as shown in fig. 5) or a small-top-large-bottom (positive tower type, as shown in fig. 6). For different coal qualities for combustion, the inverted tower type combustion system and the positive tower type combustion system shown in fig. 5 and 6 may be employed.
The innovation point of the patent lies in that the burner nozzle 1 of the main burner area is adjustable, and the actuating mechanism 2 is mature in the sofo air burner nozzle adjusting application, is not the innovation point and the key point of the patent, and is only used for applying the actuating mechanism to the main burner, and the implementation can be realized by the technical personnel in the field through the explanation.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (8)
1. The utility model provides a four corners tangential circle subassembly of variable tangential circle, includes combustor spout (1) of installing on water-cooling wall (4), its characterized in that: the coal powder burner is characterized by further comprising an actuating mechanism (2) which is used for controlling the burner nozzle (1) to swing up and down so as to adjust the height of a flame center, adjust the temperature of main steam of a boiler and adjust the temperature of reheat steam in the operation process, and controlling the burner nozzle (1) to swing left and right so as to enable coal powder to enter a hearth (5) through an air-powder pipeline (3) and then form a tangent circle, so that the diameter of the tangent circle can be changed, the coal powder burner is further suitable for actual coal burning, and the burner nozzle (1) is connected with the actuating mechanism (2).
2. The variable radiused quadrangle tangential assembly of claim 1 wherein: the up-and-down swinging angle of the burner nozzle (1) is 0-30 degrees.
3. The variable radiused quadrangle tangential assembly of claim 1 wherein: the left and right swinging angle of the burner nozzle (1) is 0-5 degrees.
4. The variable radiused quadrangle tangential assembly of claim 1 wherein: when the burner nozzle (1) is adjusted in a left-right swinging mode, every 1 degree is one gear.
5. The variable radiused quadrangle tangential assembly of claim 1 wherein: the number of the wind powder pipelines (3) is multiple, and the wind powder pipelines (3) are uniformly arranged on the outer side of the hearth (5).
6. The variable radiused quadrangle tangential assembly of claim 1 wherein: the number of the burner nozzles (1) is multiple, and the burner nozzles (1) are uniformly arranged on the outer side of the hearth (5).
7. The variable radiused quadrangle tangential assembly of claim 1 wherein: each burner nozzle (1) corresponds to an actuator (2).
8. The variable radiused quadrangle tangential assembly of claim 1 wherein: the water-cooled wall (4) is positioned in the hearth (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920496481.8U CN210241551U (en) | 2019-04-12 | 2019-04-12 | Four corners circle of contact subassembly of variable circle of contact |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920496481.8U CN210241551U (en) | 2019-04-12 | 2019-04-12 | Four corners circle of contact subassembly of variable circle of contact |
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| CN210241551U true CN210241551U (en) | 2020-04-03 |
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| CN201920496481.8U Active CN210241551U (en) | 2019-04-12 | 2019-04-12 | Four corners circle of contact subassembly of variable circle of contact |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217910A (en) * | 2021-05-20 | 2021-08-06 | 苏州西热节能环保技术有限公司 | Direct-flow combustor and boiler structure provided with same |
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2019
- 2019-04-12 CN CN201920496481.8U patent/CN210241551U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217910A (en) * | 2021-05-20 | 2021-08-06 | 苏州西热节能环保技术有限公司 | Direct-flow combustor and boiler structure provided with same |
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