Cold air dynamic field measurement system for front and rear wall opposed boilers

Abstract

The embodiment of the present application proposes a cold air dynamic field measurement system suitable for a front and rear wall hedge boiler, wherein a fixing part is fixed to the middle of the boiler's swirl burner nozzle and a spark tracer bullet is fixed on the fixing part, so that the spark tracer bullet can be arranged at the center of the airflow of the boiler's swirl burner nozzle, thereby improving the accuracy of the cold air dynamic field test; and the ignition component is an ignition battery, and a wireless signal receiver is used to receive wireless signals to control ignition, without wiring; in addition, the first track, the second track and the camera device are used in the present application to respectively capture the image information of the rotation, diffusion, disturbance and mixing of the primary air flow, the inner secondary air flow and the outer secondary air flow of the swirl burner, as well as the rigidity and hedge image information of the swirl burner airflow, and finally obtain complete boiler cold air dynamic characteristic information, and the result is more accurate and reliable, solving the problem of dangerous working environment in related technologies.

Description

Technical Field

[0001] The present application relates to the technical field of cold air dynamic field measurement systems, and in particular to a cold air dynamic field measurement system suitable for front and rear wall opposed boilers. Background Art

[0002] The reliability and economy of the operation of the front and rear wall counter-fired boilers depend to a large extent on the aerodynamic conditions of the swirl burners. In order to determine whether the aerodynamic conditions of the swirl burners are good, it is necessary to conduct a cold aerodynamic field test to check whether the rotation, diffusion, disturbance, and mixing of the primary air, internal secondary air, and external secondary air of the swirl burners are good, which will help to find problems and improve the reliability of equipment operation.

[0003] In view of the complex structure of swirl burners, the ribbon method is currently mainly used to determine the flow field characteristics of swirl burners. The ribbon method uses a long ribbon to display the airflow direction and a short ribbon to determine the existence range of the breeze area, recirculation area, and vortex area. As the simplest aerodynamic field test method, the ribbon method has obvious disadvantages. The short ribbon has poor sensitivity in indicating the airflow direction in the breeze area, and the long ribbon is affected by the entrainment effect, and the deviation of the indicated airflow direction is also large.

[0004] The four-corner tangent pulverized coal combustion boiler needs to be regularly tested for cold aerodynamic field. Through the test, the distribution, diffusion, disturbance, mixing and other aspects of the airflow in the furnace can be visually checked to see if they are good, so as to obtain accurate cold aerodynamic characteristics of the boiler. The spark tracer technology uses luminous solid particles ejected after the special spark tracer bomb is ignited to the incident flow. In the absence of external light sources, these luminous particles can show clear and continuous streamlines, which has achieved the purpose of observation. However, although the spark method has good test accuracy and intuitive results, it is very difficult to implement it on the front and rear wall hedge boiler. The main reason is that the swirl burner has a complex structure and it is difficult to arrange spark tracer bombs. In addition, the airflow trajectory of the swirl burner cannot be accurately observed at conventional observation points such as the furnace top or furnace bottom.

[0005] In view of this, it is necessary for technical personnel with this skill to provide a cold air dynamic field measurement system suitable for front and rear wall opposed combustion boilers based on the special structure of the swirl burner, so as to facilitate cold air dynamic field testing of front and rear wall opposed combustion boilers. Summary of the invention

[0006] In view of the above-mentioned prior art, the embodiment of the present application proposes a cold air dynamic field measurement system suitable for front and rear wall opposed boilers, which solves the technical problems of the spark tracer method in the related technology of measuring the cold air dynamic field of the front and rear wall opposed boilers, such as the difficulty in laying out the spark tracer bullet, the great difficulty in wiring, and the inability to accurately observe the airflow trajectory of the swirl burner.

[0007] The embodiment of the present application proposes a cold air dynamic field measurement system suitable for a front and rear wall counter-heating boiler, comprising:

[0008] A fixing member for fixing a spark tracer bomb; wherein the fixing member comprises a plurality of first sleeves provided with the spark tracer bombs, a plurality of second sleeves provided with the spark tracer bombs and a third sleeve provided with the spark tracer bombs; wherein the first sleeve, the second sleeve and the third sleeve are respectively located in the middle position of the outer secondary air flow field, the middle position of the inner secondary air flow field and the middle position of the primary air flow field of a swirl burner in a front and rear wall hedge boiler;

[0009] an ignition assembly, which is disposed on the fixing member and includes an ignition battery, wherein the ignition battery is used to ignite the spark tracer bullet; and

[0010] A camera assembly; it includes a moving track and a camera device, wherein the moving track is arranged in the middle and both sides of the cross-section of the boiler; the camera device is arranged on the moving track and slides along the moving track, and is used to capture image information of the cold air dynamic field in the boiler furnace.

[0011] In some embodiments, the movable track includes a first track and a second track, wherein the first track is at least two and is arranged in parallel in the middle of the cross-section of the boiler, and the camera devices of the first track are arranged back to back.

[0012] In some embodiments, the camera devices on the second track are two cameras arranged opposite to each other on both sides of the cross-section of the boiler, and the second track is arranged perpendicular to the first track.

[0013] In some embodiments, the first tracks are respectively directed toward the swirl burners arranged opposite thereto, and are used to capture image information of rotation, diffusion, disturbance and mixing of the primary air flow, inner secondary air flow and outer secondary air flow of the swirl burner.

[0014] In some embodiments, the camera devices on the second track are respectively located on the sides of the swirl burner for capturing the rigidity and hedging image information of the airflow of the swirl burner.

[0015] In some embodiments, the ignition assembly further includes a signal receiver, wherein the signal receiver receives an ignition instruction, causing an ignition battery to ignite the spark tracer bullet.

[0016] In some embodiments, the signal receiver is a wireless signal receiver, which is electrically connected to an external remote controller for receiving an ignition command.

[0017] In some embodiments, a plurality of the second sleeves are circumferentially arranged outside the third sleeve; a plurality of the first sleeves are circumferentially arranged and located outside the second sleeve.

[0018] In some embodiments, the first sleeve, the second sleeve and the third sleeve have the same structure, are open at both ends and have a storage cavity inside, and the storage cavity is used to fix the spark tracer bullet.

[0019] In some embodiments, the angle between adjacent first sleeves is the same as the angle between adjacent second sleeves; the angle between adjacent first sleeves is 60°, 90° or 120°.

[0020] Compared with the prior art, the beneficial effects of the present application are as follows: in the embodiment of the present application, a fixing part is used to fix the spark tracer bullet on the middle part of the swirl burner nozzle of the boiler and the spark tracer bullet is fixed on the fixing part, so that the spark tracer bullet can be arranged at the center of the airflow of the swirl burner nozzle of the boiler, thereby improving the accuracy of the cold air dynamic field test; in addition, the ignition component is an ignition battery, and a wireless signal receiver is used to receive wireless signals to control ignition, without wiring, which improves the technical defect of the difficulty of arranging and wiring the spark tracer bullet in the related art; and in the present application, a first track, a second track and a movable camera device arranged on the first track and the second track are used to respectively shoot the image information of the rotation, diffusion, disturbance and mixing of the primary air flow, the inner secondary air flow and the outer secondary air flow of the swirl burner, as well as the rigidity and hedging image information of the swirl burner airflow, and finally obtain complete information on the cold air dynamic characteristics of the boiler, and the results are more accurate and reliable, solving the problem of dangerous working environment in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A structural block diagram of a cold air dynamic field measurement system applicable to a front and rear wall opposed boiler provided in one embodiment of the present application;

[0023] Figure 2 A schematic diagram of the structure of a cold air dynamic field measurement system applicable to a front and rear wall opposed boiler provided in another embodiment of the present application;

[0024] Figure 3 A schematic diagram of the layout of an automatic camera device provided in another embodiment of the present application;

[0025] Figure 4 A schematic diagram of the structure of a cold air dynamic field measurement system applicable to a front and rear wall opposed boiler provided in another embodiment of the present application;

[0026] Figure 5 A schematic diagram of the layout of an automatic camera device provided in another embodiment of the present application;

[0027] Description of reference numerals:

[0028] In the figure, 1. boiler furnace; 2. fixing part; 3. camera device; 4. swirl burner; 5. first track; 6. signal receiver; 7. controller; 8. ignition battery; 9. second track; 10. spark tracer bullet; 11. first sleeve; 12. second sleeve; 13. third sleeve. DETAILED DESCRIPTION

[0029] In order to make those skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments, and are not intended to limit the scope of the present application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work should belong to the scope of protection of the present application.

[0030] The accompanying drawings show schematic diagrams of structures according to the embodiments disclosed in the present application. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may further design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0031] Please refer to the attached Figure 1 The embodiment of the present application is described as shown. Specifically, the embodiment of the present application proposes a cold air dynamic field measurement system suitable for a front-rear wall-opposed boiler, including a fixing member 2 for fixing a spark tracer bomb 10, an ignition component and a camera component; wherein the cold air dynamic field measurement system in this embodiment is mainly used for a front-rear wall-opposed boiler. In this embodiment, the spark tracer bomb 10 is set on the fixing member 2, and the fixing member 2 is set in the middle of the nozzle of the swirl burner 4 of the boiler, which can not only arrange the spark tracer bomb 10 at the center of the airflow of the nozzle of the swirl burner 4 of the boiler, but also can be placed in the center of the airflow of the nozzle of the swirl burner 4 of the boiler. Figure 2As shown, the accuracy of the cold air dynamic field test is improved, and the measurement point arrangement can be easily completed; in addition, in this embodiment, the ignition battery 8 in the ignition component is used to ignite the spark tracer bullet 10 without wiring, and the camera component is used to capture and collect the cold air dynamic field information in the boiler furnace 1.

[0032] Specific as Figure 4 and Figure 5 As shown, the fixing member 2 includes a plurality of first sleeves 11 provided with spark tracer bullets 10, a plurality of second sleeves 12 provided with spark tracer bullets 10 and a third sleeve 13 provided with spark tracer bullets 10; wherein in this embodiment, the first sleeve 11, the second sleeve 12 and the third sleeve 13 are respectively located in the middle position of the outer secondary air flow field, the middle position of the inner secondary air flow field and the middle position of the primary air flow field in the swirl burner 4, so that the spark tracer bullet 10 can be arranged in the middle position of the outer secondary air flow field, the middle position of the inner secondary air flow field and the middle position of the primary air flow field of the swirl burner 4, so that the spark tracer method can be used to perform a cold air dynamic field test on the front and rear wall counter-fired boilers, which changes the existing related technology that the front and rear wall counter-fired boilers mostly use the ribbon method to perform a cold air dynamic field test; the spark tracer bullet 10 uses the ignition assembly and the spark tracer bullet 10 in the first sleeve 11, the second sleeve 12 and the third sleeve 13 through the ignition battery 8.

[0033] Exemplarily, the first sleeve 11, the second sleeve 12 and the third sleeve 13 are all made of round, square or other profiles, and are open at both ends and hollow. The structures of the first sleeve 11, the second sleeve 12 and the third sleeve 13 are preferably round structures, and the three are provided with storage cavities inside for fixing the spark tracer bullet 10, wherein the outer diameter of the spark tracer bullet 10 is slightly smaller than the inner diameter of the storage cavity. After the spark tracer bullet 10 is fixed to the first sleeve 11, the second sleeve 12 and the third sleeve 13, the fixing frame is fixed on the swirl burner 4 as a whole, so that the spark tracer bullets 10 on the first sleeve 11, the second sleeve 12 and the third sleeve 13 are respectively located in the middle position of the outer secondary air flow field, the middle position of the inner secondary air flow field and the middle position of the primary air flow field of the swirl burner 4. Each spark tracer bullet 10 has an ignition battery 8 connected thereto, which uses the electric spark generated at the moment when the positive and negative electrodes of the ignition battery 8 contact to ignite the spark tracer bullet 10.

[0034] In some embodiments, a storage cavity is provided in the first sleeve 11, the second sleeve 12 and the third sleeve 13, and the storage cavity is used to fix the spark tracer bullet 10. It should be explained that the outer diameter of the spark tracer bullet 10 is only slightly smaller than the inner diameter of the storage cavity. In practical applications, the spark tracer bullet 10 is fixed in the storage cavity. The spark tracer bullet 10 in this embodiment can be fixed by a buckle or a locking knob. The connection method is simple and there is no risk of the spark tracer bullet 10 falling off or loosening from the storage cavity under the airflow flushing of the swirl burner 4 nozzle. The airflow of the swirl burner 4 nozzle is as follows: Figure 2 The arrow in the figure indicates the

[0035] In some embodiments, a plurality of second sleeves 12 are circumferentially arranged on the outside of the third sleeve 13 ; and a plurality of first sleeves 11 are circumferentially arranged and located on the outside of the second sleeve 12 .

[0036] Specifically, a plurality of second sleeves 12 are circumferentially arranged on the outside of the third sleeve 13, that is, with the third sleeve 13 as the center, the plurality of second sleeves 12 are wound around the outside of the third sleeve 13; wherein the plurality of first sleeves 11 are also circumferentially arranged with the third sleeve 13 as the center and are located on the outside of the second sleeve 12, in other words, the plurality of second sleeves 12 and the plurality of first sleeves 11 form a concentric circle structure with the third sleeve 13 as the center. Preferably, the number of first sleeves 11 is equal to the number of second sleeves 12, and the angle between adjacent first sleeves 11 is the same as the angle between adjacent second sleeves 12, such as the angle between adjacent first sleeves 11 is 60°, 90° or 120°. In addition, in order to realize the collection of ignition fuses of multiple spark tracer bullets 10, the first sleeve 11, the second sleeve 12 and the third sleeve 13 in the same radial direction are located in the same straight line.

[0037] For example, Figure 1 As shown, there are three second sleeves 12 and three first sleeves 11, and the angle between adjacent first sleeves 11 is the same as the angle between adjacent second sleeves 12, and is 120°, that is, with the third sleeve 13 as one end of the line segment and the other end connected to any first sleeve 11, the second sleeve 12 is located between the third sleeve 13 and the first sleeve 11.

[0038] In some embodiments, the camera assembly includes a moving track and a camera device 3, wherein the moving track is arranged in the middle and both sides of the cross-section of the boiler, and the camera device 3 is a plurality of cameras that can be arranged on the moving track and slide along the moving track, and is used to capture the image information of the cold air dynamic field in the boiler furnace 1. Therefore, in this embodiment, the camera device 3 is an automatic camera device, and the camera device 3 slides on the middle and both sides of the cross-section of the boiler to capture the working conditions, which is relatively good and has a low risk factor; in addition, multiple camera devices 3 are arranged at the same time to obtain complete cold air dynamic characteristic information of the boiler, and the results are more accurate and reliable, which solves the problem of dangerous working environment in related technologies.

[0039] In some embodiments, the movable track includes a first track 5 and a second track 9, wherein the first track 5 is at least two and is arranged in parallel in the middle of the cross section of the boiler, and the camera devices 3 of the first track 5 are arranged back to back.

[0040] Specific as Figure 3 As shown, a first track 5 and a second track 9 are arranged on the cross-section of the boiler, wherein the first track 5 includes two tracks and are arranged in parallel in the middle of the cross-section, and a camera device 3 is arranged on each of the two first tracks 5, and the camera devices 3 slide along the first tracks 5 respectively, but the camera devices 3 on the parallel first tracks 5 are arranged back to back, that is, back to back, and each camera device 3 is respectively facing the swirl burner 4 arranged opposite thereto, for capturing image information of rotation, diffusion, disturbance and mixing of the primary air flow, inner secondary air flow and outer secondary air flow of the swirl burner 4.

[0041] In the present embodiment, two camera devices 3 are arranged back to back, and the camera devices 3 are used to slide on the first track 5. Compared with the prior art, the number of camera devices 3 is reduced, and the running trace of the spark tracer bullet 10 after ignition in the entire boiler furnace 1 can be captured. In addition, the camera device 3 is arranged relative to the swirl burner 4, which can capture the rotation, diffusion, disturbance and mixing image information of the primary air flow, inner secondary air flow and outer secondary air flow of multiple swirl burners 4 opposite to it, which solves the technical defects of the difficulty in arranging the camera device 3 and the inability to accurately observe the airflow trajectory of the swirl burner 4 when using the spark tracer method in the cold air dynamic field measurement of the front and rear wall hedge boiler, and at the same time reduces the number of camera devices 3.

[0042] In some embodiments, two second rails 9 are arranged opposite to each other on both sides of the cross-section of the boiler, and the second rails 9 are arranged perpendicular to the first rails 5 .

[0043] Specific as Figure 3As shown, the second track 9 is two tracks arranged relatively on both sides of the cross-section of the boiler, that is, the two second tracks 9 are respectively located on both sides of the first track 5 and are arranged perpendicular to the first track 5, wherein the second track 9 is located on both sides of the boiler furnace 1 where the swirl burner 4 is arranged, and the camera device 3 on the second track 9 slides along the second track 9 to shoot the rigidity and hedging image information of the airflow of the swirl burner 4. Therefore, in this embodiment, the image information shot by the camera device 3 on the first track 5 is combined with the image information shot by the camera device 3 on the second track 9 to obtain complete cold-state air dynamic characteristic information of the boiler, and the result is more accurate and reliable, which solves the problem of dangerous working environment during manual shooting due to the arrangement of the camera device 3 in the related technology.

[0044] In some embodiments, the ignition assembly further includes a signal receiver 6 , and after receiving the ignition instruction, the signal receiver 6 ignites the ignition battery 8 to ignite the spark tracer bullet 10 .

[0045] Specifically, the signal receiver 6 can be a wireless signal receiver 6, and the remote controller 7 outside the signal receiver 6 is electrically connected to receive an ignition command issued by the remote controller 7, so that the ignition battery 8 ignites the spark tracer bullet 10. Therefore, the wireless signal is used to control the ignition in the present application, and no wiring is required. The entire system can be remotely controlled and automatically operated, which solves the technical defects in the related art that the power cord used for ignition needs to be connected to the spark tracer bullet 10, which makes it difficult to arrange measurement points and wiring, and the working environment is dangerous.

[0046] The following is an exemplary description of the method of using the cold air dynamic field measurement system suitable for front and rear wall counter-attack boilers in this embodiment: fix the spark tracer bullet 10 on the fixing part 2, and place the fixing part 2 in the middle of the nozzle of the swirl burner 4 of the boiler; assemble the ignition component and the camera component, and the air enters the furnace through the nozzle of the swirl burner 4 of the boiler, and transmits a wireless signal to ignite the spark tracer bullet 10. The luminous solid particles ejected by the spark tracer bullet 10 enter the aerodynamic field in the furnace, and the camera device 3 arranged on the first track 5 is used to capture the image information of the rotation, diffusion, disturbance and mixing of the primary air flow, the inner secondary air flow and the outer secondary air flow of the swirl burner 4; the camera device 3 arranged on the second track 9 is used to capture the rigidity and counter-attack image information of the air flow of the swirl burner 4, and finally obtain the complete cold air dynamic characteristics of the boiler.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cold air dynamic field measurement system suitable for front and rear wall opposed boilers, characterized in that: include A fixing member for fixing a spark tracer bomb; wherein the fixing member comprises a plurality of first sleeves provided with the spark tracer bombs, a plurality of second sleeves provided with the spark tracer bombs and a third sleeve provided with the spark tracer bombs; wherein the first sleeve, the second sleeve and the third sleeve are respectively located in the middle position of the outer secondary air flow field, the middle position of the inner secondary air flow field and the middle position of the primary air flow field of a swirl burner in a front and rear wall hedge boiler; an ignition assembly, which is disposed on the fixing member and includes an ignition battery, wherein the ignition battery is used to ignite the spark tracer bullet; and A camera assembly; it comprises a movable track and a camera device, wherein the movable track is arranged in the middle and both sides of the cross-section of the boiler; the camera device is arranged on the movable track and slides along the movable track, and is used to capture the image information of the cold air dynamic field in the furnace of the boiler; the movable track comprises a first track and a second track, wherein the first track is at least two and is arranged in parallel in the middle of the cross-section of the boiler, and the camera devices of the first track are arranged back to back; the second track is two relatively arranged on both sides of the cross-section of the boiler, and the second track is arranged perpendicular to the first track.

2. The measuring system according to claim 1, characterized in that The camera devices on the first track are respectively directed toward the swirl burners arranged opposite thereto, and are used to capture image information of rotation, diffusion, disturbance and mixing of the primary air flow, inner secondary air flow and outer secondary air flow of the swirl burner.

3. The measuring system according to claim 1, characterized in that The camera devices on the second track are respectively located at the sides of the swirl burner for capturing the rigidity and hedging image information of the airflow of the swirl burner.

4. The measuring system according to any one of claims 1 to 3, characterized in that: The ignition assembly also includes a signal receiver, which receives an ignition instruction to cause an ignition battery to ignite the spark tracer bullet.

5. The measuring system according to claim 4, characterized in that The signal receiver is a wireless signal receiver, which is electrically connected to an external remote controller and is used to receive an ignition command.

6. The measuring system according to claim 4, characterized in that A plurality of the second sleeves are circumferentially arranged on the outside of the third sleeve; a plurality of the first sleeves are circumferentially arranged and located on the outside of the second sleeve.

7. The measuring system according to claim 4, characterized in that The first sleeve, the second sleeve and the third sleeve have the same structure, are open at both ends and have a storage cavity inside, and the storage cavity is used to fix the spark tracer bullet.

8. The measuring system according to claim 4, characterized in that: The angle between adjacent first sleeves is the same as the angle between adjacent second sleeves; the angle between adjacent first sleeves is 60°, 90° or 120°.

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