CN217550037U - Flow field optimization and adjustment flow dividing device - Google Patents
Flow field optimization and adjustment flow dividing device Download PDFInfo
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- CN217550037U CN217550037U CN202221340125.5U CN202221340125U CN217550037U CN 217550037 U CN217550037 U CN 217550037U CN 202221340125 U CN202221340125 U CN 202221340125U CN 217550037 U CN217550037 U CN 217550037U
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Abstract
The utility model relates to a flow field optimizes diverging device of adjustment. At present, the length of the existing cold and hot air mixing section can not meet the requirement, so that the primary air flow field distribution at the position of an online measurement section is extremely uneven, and the problems of obvious high-speed areas, low-speed areas, high-temperature areas and low-temperature areas are caused. A flow dividing device for flow field optimization and adjustment comprises: air duct (9), the air duct top is connected with hot-blast entry (1), the air duct below is connected with coal pulverizer entry (4), air duct one side is equipped with cold wind flaring (5), be equipped with two cold wind bellows (6) in the air duct, two cold wind bellows front ends all are equipped with guide plate (7), be equipped with flow equalizer (8) in the air duct, the air duct is like the S type, two cold wind bellows are located and are close to cold wind flaring department, and swing joint, two guide plates are located the air duct, two guide plates are located air duct 990 corner, flow equalizer is located the on-line measuring section. The utility model discloses be applied to the flow field.
Description
The technical field is as follows:
the utility model relates to a flow field optimizes diverging device of adjustment.
The background art comprises the following steps:
the flow field refers to that the speed, the pressure and the like all change in one flow field, and is a general term of the flow velocity field, the pressure field and the like defined on a time and space point coordinate field by functions of flow velocity, pressure and the like of fluid particle motion described by an Euler method, and the spatial distribution of the air flow motion at a certain moment.
Aiming at the simulation result of primary air flow field distribution data at the entrance of a coal mill, the conventional primary air flow field distribution condition of cold and hot air is extremely short, the cold air cannot penetrate through hot air only depending on the momentum of cold air, and the conventional mixing section length of the whole section can be filled by a long mixing section, so that the primary air flow field distribution at the online measurement section is extremely uneven, an obvious high-speed region and a low-speed region are generated, and an obvious high-temperature region and a low-temperature region are generated, the relative standard deviation of the flow velocity distribution at the section of an air volume measurement element reaches 20.1%, the relative standard deviation of the air velocity distribution at the section of an air volume measurement element is 5.7 m/s-20.6 m/s, the relative standard deviation of the temperature distribution is 12.5%, the air temperature range is 36K 593K, the highest temperature is extremely 230 ℃ lower than the lowest temperature, the primary air flow field distribution at the entrance of the coal mill needs to be optimized, the problem of the primary air flow field distribution at the entrance of the coal mill is solved urgently, the primary air flow field condition of the primary air flow field at the entrance of the coal mill is improved, the primary air flow field at the entrance of the coal mill, the coal mill is solved, the primary air flow field, the problem of the primary air flow field measurement at the entrance of the coal mill is thoroughly solved, and the primary air flow field measurement at the coal mill is solved, and the operation safety and the flow field of the coal mill is improved.
The invention content is as follows:
the utility model aims at providing a diverging device of flow field optimization adjustment.
The above purpose is realized by the following technical scheme:
a flow field optimization adjusting flow dividing device comprises an air channel, wherein a hot air inlet is connected above the air channel, a coal mill inlet is connected below the air channel, a cold air flaring is arranged on one side of the air channel, two cold air boxes are arranged in the air channel, flow guide plates are arranged at the front ends of the two cold air boxes, and a flow equalizing plate is arranged in the air channel;
the air duct is of an S-shaped structure, the two cold air boxes are positioned close to the cold air expansion opening and are movably connected,
the two guide plates are positioned in the air duct, and the two guide plates are positioned at a 90-degree corner of the air duct;
the flow equalizing plate is positioned in the online measuring section and is positioned at the upstream;
the cold air flaring is a fan-shaped opening.
The flow field is optimized and adjusted by the flow dividing device, and the rear end of the cold air flaring is connected with a cold air inlet.
The flow field optimizing and adjusting flow dividing device has the advantages that the cold air flaring and the cold air bellows can divide cold air flow into a plurality of strands, so that the cold air flow is uniformly distributed in the hot air duct, and meanwhile, the mixing of cold air and hot air is enhanced.
The utility model has the advantages that:
1. the utility model provides an it can't reach the requirement far away to provide the mixed segment length among the above-mentioned background art, leads to the extremely inhomogeneous of the wind current field distribution of on-line measuring cross-section department, appears obvious high-speed region and low-speed district to and the problem of obvious high-temperature region and low-temperature region.
2. The utility model discloses a coal pulverizer entry wind flow field is optimized, solves the extremely inhomogeneous problem of coal pulverizer entry wind channel flow field distribution, improves coal pulverizer entry wind flow field condition, thoroughly solves the unsafe problem of coal pulverizer entry wind rate measurement, promotes the security and the economic nature of coal pulverizer operation.
Description of the drawings:
fig. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
in the figure: 1. a hot air inlet; 2. a cold air inlet; 3. measuring the cross section on line; 4. an inlet of a coal mill; 5. flaring by cold air; 6. a cold air box; 7. a baffle; 8. a flow equalizing plate; 9. and (6) an air duct.
The specific implementation mode is as follows:
example 1:
as shown in fig. 1 and 2: the coal mill air flow field optimizing device is characterized in that a hot air inlet 1 is connected to the upper portion of an air duct 9, a coal mill inlet 4 is connected to the lower portion of the air duct 9, cold air flaring 5 is arranged on one side of the air duct 9, two cold air boxes 6 are arranged in the air duct 9, guide plates 7 are arranged at the front ends of the two cold air boxes 6, a flow equalizing plate 8 is arranged in the air duct 9, the air duct 9 is S-shaped, the two cold air boxes 6 are located close to the cold air flaring 5 and movably connected, the two guide plates 7 are located in the air duct 9, the two guide plates 7 are located at an air duct 990-degree corner, the flow equalizing plate 8 is located in an online measurement section 3 and located at the upstream, the cold air flaring 5 is a fan-shaped opening, a cold air inlet 2 is connected to the rear end of the cold air flaring 5, a coal mill inlet primary air flow field is optimized, the problem that the primary air flow field distribution of the coal mill inlet is extremely uneven is solved, the condition of the primary air flow field of the coal mill inlet is improved, the problem that the primary air flow field condition of the coal mill inlet is solved thoroughly, the problem that the primary air quantity measurement of the coal mill inlet is inaccurate, and the safety and economical efficiency of the operation of the coal mill are improved.
The working principle is as follows: when the device is used, hot air enters the air duct 9 through the hot air inlet 1, cold air enters the air duct 9 through the cold air inlet 2 and then is delivered into the air duct 9 through the cold air flaring 5, the guide plate 7 plays a role in guiding air flow, the cold air and the hot air are uniformly distributed in the hot air duct under the action of the cold air flaring 5 and the cold air bellows 6, meanwhile, the mixing of the cold air and the hot air is enhanced, the cold air and the hot primary air can be quickly and fully mixed, a high-temperature area and a low-temperature area of fluid are eliminated, the deviation of the high-speed area and the low-speed area is obviously relieved, the uniformity of flow field distribution of a measuring section is greatly improved, the flow field environment of a measuring element is greatly improved, the relative standard deviation of flow velocity distribution at the section 3 of the online air measuring element is reduced to about 11.7% from 20.1% before optimization, the range of the flow velocity is reduced to 8.0m/s from 14.9m/s, the relative standard deviation of temperature distribution is reduced to about 2.8% from 12.5% before optimization, and the temperature difference of the high-temperature area and the low-temperature area is reduced to 79 ℃.
On-line air volume measuring section flow field uniformity index under existing air duct arrangement condition
| Flow rate relative standard deviation,% | Interval of flow velocity, m/s | Temperature relative standard deviation,% | Temperature interval, K |
| 20.1% | 5.7~20.6 | 12.5% | 363~593 |
Claims (3)
1. The utility model provides a diverging device of flow field optimization adjustment, its constitution includes the wind channel, characterized by: the upper part of the air duct is connected with a hot air inlet, the lower part of the air duct is connected with a coal mill inlet, one side of the air duct is provided with a cold air flaring, two cold air boxes are arranged in the air duct, the front ends of the two cold air boxes are respectively provided with a guide plate, and the air duct is internally provided with a flow equalizing plate;
the air duct is of an S-shaped structure, and the two cold air boxes are positioned close to the cold air expansion opening and are movably connected;
the two air deflectors are positioned in the air duct, and the two air deflectors are positioned at the 90-degree corner of the air duct;
the flow equalizing plate is positioned in the online measuring section and is positioned at the upstream;
the cold air flaring is a sector opening.
2. The flow field optimizing regulation flow splitting device of claim 1, wherein: the rear end of the cold air flaring is connected with a cold air inlet.
3. The flow field optimized and adjusted flow field splitting device of claim 2, wherein: the cold air flaring and the cold air bellow can divide the cold air flow into a plurality of strands, so that the cold air flow is uniformly distributed in the hot air channel, and the mixing of the cold air and the hot air is enhanced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221340125.5U CN217550037U (en) | 2022-05-31 | 2022-05-31 | Flow field optimization and adjustment flow dividing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221340125.5U CN217550037U (en) | 2022-05-31 | 2022-05-31 | Flow field optimization and adjustment flow dividing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217550037U true CN217550037U (en) | 2022-10-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221340125.5U Active CN217550037U (en) | 2022-05-31 | 2022-05-31 | Flow field optimization and adjustment flow dividing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217550037U (en) |
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2022
- 2022-05-31 CN CN202221340125.5U patent/CN217550037U/en active Active
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