CN215541683U - Mill entry cold and hot air mixing arrangement - Google Patents
Mill entry cold and hot air mixing arrangement Download PDFInfo
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- CN215541683U CN215541683U CN202121309140.9U CN202121309140U CN215541683U CN 215541683 U CN215541683 U CN 215541683U CN 202121309140 U CN202121309140 U CN 202121309140U CN 215541683 U CN215541683 U CN 215541683U
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Abstract
The utility model discloses a mill inlet cold and hot air mixing device which comprises a hot air pipe and cold air pipes which are arranged at the air inlet ends of the hot air pipe and are communicated with each other, wherein a flow equalizing assembly is arranged in the hot air pipe; the flow equalizing assembly comprises a plurality of groups of radially arranged guide plates, a plurality of groups of guide plates are uniformly arranged on the upper surface of each guide plate, the guide plates are arranged through the arrangement, cold air flow is divided into a plurality of flows, the cold air flow is uniformly distributed in a hot air pipe, the mixing of cold air and hot air is enhanced simultaneously, the guide plates are arranged through the arrangement, downward flow is formed in a channel between every two guide plates, the mixed flow effect is further improved, the flow equalizing plates are arranged, the upstream of an online wind measuring element is arranged, the uniform distribution effect is achieved on the air flow, the speed field and the temperature field distribution uniformity of the online wind measuring section can be remarkably improved, a good flow field environment is provided for the accurate measurement of the online wind measuring element, the problem that the primary air quantity measurement at the inlet of the coal mill is inaccurate is thoroughly solved, and the safety and the economical efficiency of the operation of the coal mill are improved.
Description
Technical Field
The utility model relates to the field of mixing of cold air and hot air of a coal mill, in particular to a cold air and hot air mixing device at a mill inlet.
Background
A coal mill is a machine for crushing and grinding coal blocks into coal powder, is an important auxiliary device of a coal powder furnace, and is used for simulating a traditional cold air mixing device at an inlet of the coal mill, wherein a simulation result shows that under the arrangement condition of a primary cold air duct and a primary hot air duct, the mixing distance of cold air and hot air is extremely short, the cold air and the hot air are difficult to penetrate through the hot air only depending on the momentum of the cold air, a very long mixing section is required to fill the whole section, the length of the existing mixing section can not meet the requirement, so that primary air flow distribution at the section of an online measurement is extremely uneven, an obvious high-speed region and low-speed region are generated, and an obvious high-temperature region and 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 air flow velocity interval is 5.7 m/s-20.6 m/s, the relative standard deviation of the temperature distribution is 12.5%, and the air flow temperature interval is 363K-593K, the difference between the highest temperature and the lowest temperature is 230 ℃, the optimization of a primary air flow field at the inlet of the coal mill is urgently needed, the problem of extremely uneven distribution of the primary air flow field at the inlet of the coal mill is solved, the primary air flow field condition at the inlet of the coal mill is improved, the problem of inaccurate primary air quantity measurement at the inlet of the coal mill is thoroughly solved, and the safety and the economical efficiency of the operation of the coal mill are improved.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides the cold and hot air mixing device at the mill inlet, which can obviously improve the distribution uniformity of a speed field and a temperature field at the position of an online anemometry section, provide a good flow field environment for the accurate measurement of an online anemometry element, thoroughly solve the problem of inaccurate primary air quantity measurement at the inlet of a coal mill, and improve the safety and the economical efficiency of the operation of the coal mill.
In order to solve the technical problems, the utility model provides the following technical scheme: a mill inlet cold and hot air mixing device comprises a hot air pipe and cold air pipes which are arranged at air inlet ends of the hot air pipe and are communicated with each other, wherein a flow equalizing assembly is arranged in the hot air pipe;
the flow equalizing assembly comprises a plurality of groups of guide plates which are arranged in a radial direction, and a plurality of groups of guide plates are uniformly arranged on the upper surface of each guide plate.
As a preferred technical scheme of the utility model, a plurality of groups of guide plates are all arranged in the diameter range of the joint of the cold air pipe and the hot air pipe.
As a preferred technical scheme of the utility model, the multiple groups of guide plates are of a step-shaped structure, and the position close to the connection part of the cold air pipe and the hot air pipe is the lowest point.
As a preferred technical scheme of the utility model, the hot air pipe comprises a connecting pipe which is arranged close to the lower end of the guide plate, and a flow equalizing plate is arranged in the connecting pipe.
As a preferred technical scheme of the utility model, the flow equalizing plate comprises an adjusting plate which is rotatably connected to the bottom, the adjusting plate has the same structure as the flow equalizing plate, a shifting plate is arranged on the outer side of the adjusting plate, and a movable groove which is matched with the shifting plate in a rotating mode is annularly formed in the outer side of the connecting pipe.
As a preferred technical scheme of the utility model, the adjusting plate is arranged on one side of the movable groove, corresponds to a plate hole of the flow equalizing plate and is in a fully open state, the adjusting plate is arranged on the other side of the movable groove, and the adjusting plate and the plate hole of the flow equalizing plate are staggered with each other and are in a fully closed state.
As a preferred technical scheme of the utility model, the cold air pipe comprises a conical pipe arranged at the joint of the cold air pipe and the hot air pipe, and one end of the conical pipe close to the hot air pipe is large in caliber.
Compared with the prior art, the utility model can achieve the following beneficial effects:
1. the cold air flow is divided into a plurality of strands by the arranged guide plate, so that the cold air flow is uniformly distributed in the hot air pipe, and the mixing of the cold air and the hot air is enhanced.
2. Through the deflector that sets up, downward circulation in the passageway that forms between per two deflectors 32, and then the effect of improvement mixed flow.
3. The flow equalizing plate is arranged at the upstream of the on-line wind measuring element to uniformly distribute the air flow.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic illustration of an explosive structure according to the present invention;
FIG. 3 is a schematic diagram of a current share assembly according to the present invention;
fig. 4 is a schematic cross-sectional structure of the present invention.
Wherein:
1. a hot air pipe; 11. a connecting pipe; 111. a movable groove; 12. a flow equalizing plate; 121. an adjusting plate; 122. dialing a plate;
2. a cold air pipe; 21. a tapered tube;
3. a current sharing component; 31. a baffle; 32. a guide plate.
Detailed Description
The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example (b):
as shown in fig. 1-4, the utility model provides a mill inlet cold and hot air mixing device, which comprises a hot air pipe 1 and a cold air pipe 2 arranged at the air inlet end of the hot air pipe 1 and communicated with each other, wherein a flow equalizing assembly 3 is arranged in the hot air pipe 1; the flow equalizing assembly 3 comprises a plurality of groups of guide plates 31 which are arranged in a radial direction, and a plurality of groups of guide plates 32 are uniformly arranged on the upper surface of each guide plate 31.
When in use, the coal mill is arranged at the air outlet at the bottom of the hot air pipe 1, the cold air pipe 2 is connected with a cold air device (not shown in the figure), the air flow in the cold air pipe 2 is divided into a plurality of layers by the guide plate 31, so that the cold air can be uniformly distributed in the hot air pipe 1, the mixing of the cold air and the hot air is enhanced, the guide plate 31 is arranged at the ninety-degree corner of the air duct to guide the air flow, the flow equalizing plate 12 arranged at the lower end of the guide plate 31 uniformly distributes the air flow, meanwhile, a plurality of groups of guide plates 32 which are arranged on the upper surface of the guide plate 31 are arranged in a step-shaped structure, the upper part of each guide plate 32 is in an open structure, the cold air can be conveniently divided and downwards distributed in the channel formed between every two guide plates 32 in the process of flowing the cold air to the hot air pipe 1, the mixed flow effect is further improved, the velocity field and the temperature field distribution uniformity at the section of online air measurement can be obviously improved, the method provides a good flow field environment for accurate measurement of an online wind measuring element, thoroughly solves the problem of inaccurate primary air quantity measurement at the inlet of the coal mill, and improves the safety and the economical efficiency of operation of the coal mill.
In other embodiments, the multiple groups of flow deflectors 31 are all installed in the diameter range of the joint of the cold air pipe 2 and the hot air pipe 1, and the hot air pipe 1 at the air outlet of the cold air pipe 2 is divided into multiple layers, so that cold air can be uniformly distributed in the hot air pipe 1.
In other embodiments, the plurality of sets of guide plates 32 are in a stepped structure, and the lowest point is near the connection between the cold air pipe 2 and the hot air pipe 1, so that cold air can be conveniently distributed and can flow downwards in the channel formed between every two guide plates 32, and the mixed flow effect is further improved.
In other embodiments, the hot air duct 1 includes a connecting pipe 11 installed near the lower end of the flow guide plate 31, and a flow equalizing plate 12 is installed inside the connecting pipe 11 to equalize the mixed air flow.
In other embodiments, the flow equalizing plate 12 includes an adjusting plate 121 rotatably connected to the bottom, the adjusting plate 121 has the same structure as the flow equalizing plate 12, a shifting plate 122 is installed on the outer side of the adjusting plate 121, a movable groove 111 adapted to the shifting plate 122 is annularly formed on the outer side of the connecting pipe 11, and the size of the opening of the plate hole of the flow equalizing plate 12 is changed by rotating the adjusting plate 121, so as to adjust the moderated airflow at the air outlet end.
In other embodiments, the adjusting plate 121 is disposed on one side of the movable slot 111, the adjusting plate 121 corresponds to a plate hole of the flow equalizing plate 12 and is in a fully open state, the adjusting plate 121 is disposed on the other side of the movable slot 111, and the adjusting plate 121 and the plate hole of the flow equalizing plate 12 are staggered with each other and are in a fully closed state, so that the adjustment of the open and closed states can be rapidly realized.
In other embodiments, the cold air pipe 2 includes a conical pipe 21 disposed at a connection position with the hot air pipe 1, and one end of the conical pipe 21 close to the hot air pipe 1 is of a large diameter, so as to increase an area of uniformly distributed cold air at a cold air outlet position, and facilitate separation of multiple layers of cold air for mixing.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a mill entry cold and hot air mixing arrangement, is including hot-blast main (1), install cold wind pipe (2) that feed end intercommunication each other in hot-blast main (1), its characterized in that: a flow equalizing assembly (3) is arranged in the hot air pipe (1);
the flow equalizing assembly (3) comprises a plurality of groups of guide plates (31) which are arranged in a radial direction, and a plurality of groups of guide plates (32) are uniformly arranged on the upper surface of each guide plate (31).
2. The mill inlet cold and hot air mixing device according to claim 1, wherein: the guide plates (31) are all arranged in the diameter range of the joint of the cold air pipe (2) and the hot air pipe (1).
3. The mill inlet cold and hot air mixing device according to claim 1, wherein: the guide plates (32) are in a step-shaped structure, and the connection part close to the cold air pipe (2) and the hot air pipe (1) is the lowest point.
4. The mill inlet cold and hot air mixing device according to claim 1, wherein: the hot air pipe (1) comprises a connecting pipe (11) which is arranged close to the lower end of the guide plate (31), and a flow equalizing plate (12) is arranged inside the connecting pipe (11).
5. The mill inlet cold and hot air mixing device according to claim 4, wherein: the flow equalizing plate (12) is including rotating regulating plate (121) of connecting in the bottom, regulating plate (121) and flow equalizing plate (12) structure is the same, and the outside is installed and is dialled board (122), connecting pipe (11) outside annular seted up with dialling board (122) adaptation pivoted movable groove (111).
6. The mill inlet cold and hot air mixing device according to claim 5, wherein: activity groove (111) one side is arranged in to regulating plate (121), and regulating plate (121) and flow equalizing plate (12) plate hole are corresponding, are in the full open mode, activity groove (111) opposite side is arranged in to regulating plate (121), and regulating plate (121) and flow equalizing plate (12) plate hole misplace each other, are in totally closed state.
7. The mill inlet cold and hot air mixing device according to claim 1, wherein: the cold air pipe (2) comprises a conical pipe (21) arranged at the joint of the cold air pipe and the hot air pipe (1), and one end, close to the hot air pipe (1), of the conical pipe (21) is large in caliber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121309140.9U CN215541683U (en) | 2021-06-11 | 2021-06-11 | Mill entry cold and hot air mixing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121309140.9U CN215541683U (en) | 2021-06-11 | 2021-06-11 | Mill entry cold and hot air mixing arrangement |
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| Publication Number | Publication Date |
|---|---|
| CN215541683U true CN215541683U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121309140.9U Active CN215541683U (en) | 2021-06-11 | 2021-06-11 | Mill entry cold and hot air mixing arrangement |
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| CN (1) | CN215541683U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592134A (en) * | 2022-03-09 | 2022-06-07 | 河南龙佰智能装备制造有限公司 | Air cooling device for large cover of titanium sponge I-type reactor |
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2021
- 2021-06-11 CN CN202121309140.9U patent/CN215541683U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592134A (en) * | 2022-03-09 | 2022-06-07 | 河南龙佰智能装备制造有限公司 | Air cooling device for large cover of titanium sponge I-type reactor |
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Effective date of registration: 20220602 Address after: 239300 east of jingsan road and north of tianchu Road, Anhui Economic Development Zone, Tianchang City, Chuzhou City, Anhui Province Patentee after: Anhui Xinneng automation equipment Co.,Ltd. Address before: 239300 No. 22, Weier Road, Chuzhou high tech Industrial Development Zone, Chuzhou City, Anhui Province Patentee before: JINGYI SHARES CO.,LTD. |