CN220505366U - Coal-fired unit and fan monitoring device thereof - Google Patents
Coal-fired unit and fan monitoring device thereof Download PDFInfo
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- CN220505366U CN220505366U CN202321734837.XU CN202321734837U CN220505366U CN 220505366 U CN220505366 U CN 220505366U CN 202321734837 U CN202321734837 U CN 202321734837U CN 220505366 U CN220505366 U CN 220505366U
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- wind speed
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- air
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 21
- 238000005452 bending Methods 0.000 claims abstract description 3
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000003245 coal Substances 0.000 claims 1
- 239000002817 coal dust Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a coal-fired unit and a fan monitoring device thereof. The fan has an outlet for the air. The air supply pipeline is provided with an air inlet pipe section which extends in a bending mode, and the air inlet pipe section is communicated with the outlet. The first wind speed measurer and the second wind speed measurers are arranged on the same radial surface in the air inlet pipe section and are adjacent to the outlet and used for measuring the wind speed at the outlet, the first wind speed measurer is adjacent to the center of the radial surface, and the second wind speed measurers are arranged around the periphery of the first wind speed measurer in a cross shape. The coal-fired unit and the fan monitoring device thereof can reflect the wind speed condition at the outlet of the fan more comprehensively and accurately.
Description
Technical Field
The utility model relates to a fan monitoring device of a coal-fired unit, in particular to a coal-fired unit and a fan monitoring device thereof.
Background
When a power station with a coal-fired unit generates power, firstly, coal dust is blown into a power station boiler through an air supply pipeline by means of a fan, and then the power station boiler burns the coal dust to generate power. In the process, the wind speed and the wind quantity of the fan outlet are related to the operation safety and the operation efficiency of the power station boiler, and the monitoring value is high.
However, if the wind speed of the fan outlet is monitored, a wind speed sensor needs to be arranged in the air supply pipeline, but because the diameter of the air supply pipeline of the coal-fired unit power station is large and the air supply pipeline is bent and extended, the structure is complex, after the wind provided by the fan enters the air supply pipeline, the flow speed field formed in the air supply pipeline is low in flow speed and unstable, and the wind speed values of all points on the section of the air supply pipeline have large difference, and the wind speed and the wind quantity of the fan outlet cannot be comprehensively and accurately reflected by a single wind speed sensor.
Disclosure of Invention
The utility model has the advantages that the coal-fired unit and the fan monitoring device thereof are provided, and the wind speed condition at the outlet of the fan can be comprehensively and accurately reflected.
To achieve at least one of the above advantages, the present utility model provides a blower monitoring device, including a blower having an outlet for air out; the air supply pipeline is provided with an air inlet pipe section which extends in a bending mode, and the air inlet pipe section is communicated with the outlet; and the first wind speed measurer and the second wind speed measurers are arranged on the same radial surface in the air inlet pipe section and are adjacent to the outlet and used for measuring the wind speed at the outlet, the first wind speed measurer is adjacent to the center of the radial surface, and the second wind speed measurers are arranged around the periphery of the first wind speed measurer in a cross shape.
According to an embodiment of the utility model, the first wind speed measurer and the second wind speed measurer each comprise: an outer venturi; the inner venturi tube is sleeved in the outer venturi tube and positioned in front of the throat part of the outer venturi tube along the air inlet direction; a differential pressure transmitter; the outer impulse pipe is respectively communicated with the outer venturi pipe and the differential pressure transmitter; the inner impulse pipe is respectively communicated with the inner venturi pipe and the differential pressure transmitter; and the controller is connected with the differential pressure transmitter and is used for determining the wind speed according to the differential pressure of the outer impulse pipe and the inner impulse pipe.
According to an embodiment of the present utility model, the number of the second wind speed measuring devices is four, and the four second wind speed measuring devices are symmetrically arranged around the center of the radial surface.
According to an embodiment of the utility model, the shape enclosed by the four second anemometers is the same as the shape of the radial surface.
According to an embodiment of the present utility model, the wind speed measuring device further includes a first processor, where the first processor is connected to the first wind speed measuring device and the plurality of second wind speed measuring devices, respectively, and is configured to determine a wind speed of the fan outlet according to an average value of the plurality of second wind speed data measured by the plurality of second wind speed measuring devices and the first wind speed data measured by the first wind speed measuring device.
According to an embodiment of the present utility model, the air conditioning system further includes a second processor, connected to the first processor, for determining the air volume of the fan outlet according to the air speed and the sectional area of the radial surface.
According to an embodiment of the present utility model, the air intake pipe section includes a first arc-shaped section and a second arc-shaped section, the first arc-shaped section extends in an arc shape and is recessed toward a first direction, one end of the first arc-shaped section is communicated with the fan outlet, the end is provided with the first wind speed measurer and the second wind speed measurer, the second arc-shaped section extends in an arc shape and is recessed toward a second direction opposite to the first direction, and the second arc-shaped section is communicated with the other end of the first arc-shaped section.
According to an embodiment of the present utility model, the air supply pipe further includes a right-angle elbow and an air supply pipe section, and the air supply pipe section is communicated with the second arc section through the right-angle elbow.
The present utility model also provides a coal-fired unit comprising: a coal-fired boiler; and the fan monitoring device is communicated with the coal-fired boiler and used for blowing coal dust to the coal-fired boiler.
According to one embodiment of the utility model, a muffler is included, the muffler being disposed upstream of and in communication with the fan.
Drawings
Fig. 1 is a schematic layout view of a coal-fired unit according to an embodiment of the present utility model.
FIG. 2 is a perspective view of a fan monitoring device according to an embodiment of the present utility model at an angle.
Fig. 3 is an enlarged schematic view of the portion a in fig. 2.
FIG. 4 is a perspective view of a fan monitoring device according to an embodiment of the present utility model at another angle.
FIG. 5 is a schematic diagram of the structure of the first wind speed measurer or the second wind speed measurer according to the embodiment of the utility model.
Reference numerals
100. A fan monitoring device; 900. a coal-fired boiler; 800. a muffler;
10. a blower;
20. an air supply pipeline; 21. an air inlet pipe section; 211. a first arcuate segment; 212. a second arcuate segment; 2101. a radial surface; 22. a right-angle elbow; 23. a section of air supply pipe;
30. a first wind speed measurer; 31. an outer venturi; 32. an inner venturi; 33. a differential pressure transmitter; 34. an outer impulse pipe; 35. an inner impulse pipe; 36. a controller;
40. and a second wind speed measurer.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Fig. 1 is a schematic layout view of a coal-fired unit according to an embodiment of the present utility model. FIG. 2 is a perspective view of a fan monitoring apparatus 100 according to an embodiment of the present utility model at an angle. Fig. 3 is an enlarged schematic view of the portion a in fig. 2. FIG. 4 is a perspective view of the fan monitoring apparatus 100 of an embodiment of the present utility model at another angle. Referring to fig. 1 to 4, a fan monitoring apparatus 100 according to an embodiment of the present utility model includes a fan 10, a supply duct 20, a first wind speed measurer 30 and a plurality of second wind speed measurers 40.
The fan 10 has an outlet for the air. The air supply pipe 20 has a curved air intake section 21, and the outlet communicates with the air intake section 21 for supplying air to the air intake section 21. The first wind speed measurer 30 and the plurality of second wind speed measurers 40 are disposed on the same radial surface 2101 in the air inlet pipe section 21 and are adjacent to the outlet of the fan 10, and are used for measuring the wind speed at the outlet, the first wind speed measurer 30 is disposed adjacent to the center of the radial surface 2101, and the plurality of second wind speed measurers 40 are disposed around the periphery of the first wind speed measurer 30 in a cross shape.
In this way, by using the second wind speed measuring devices 40 and the first wind speed measuring devices 30, the present utility model can measure a plurality of wind speeds of two dimensions, that is, a plurality of points on two different radial lines, on a cross section in the wind inlet pipe section 21, and wind speeds near the center of the cross section, and since the two radial lines are vertically arranged in a cross shape and the first wind speed measuring devices 30 are disposed inside the second wind speed measuring devices 40, the measured wind speed data are distributed more uniformly and comprehensively, and the wind speed condition at the outlet of the fan 10 can be reflected more comprehensively and accurately.
Fig. 5 is a schematic structural view of the first wind speed measurer 30 or the second wind speed measurer 40 according to an embodiment of the present utility model. The first wind speed measurer 30 and the second wind speed measurer 40 each include an outer venturi 31, an inner venturi 32, a differential pressure transmitter 33, an outer impulse pipe 34, an inner impulse pipe 35, and a controller 36. The inner venturi tube 32 is sleeved in the outer venturi tube 31 and is positioned in front of the throat 311 of the outer venturi tube 31 along the air inlet direction. The outer impulse pipe 34 is respectively communicated with the outer venturi pipe 31 and the differential pressure transmitter 33. The inner impulse pipe 35 communicates with the inner venturi 32 and the differential pressure transmitter 33, respectively. The controller 36 is connected to the differential pressure transmitter 33 for determining the wind speed based on the differential pressure between the outer impulse pipe 34 and the inner impulse pipe 35.
It is well known to those skilled in the art that based on the Bernoulli equation and the fluid flow continuity equation, the flow velocity of the fluid in a pipe is proportional to the evolution of its differential pressure, i.e., the relationship of the air flow velocity to differential pressure is:
wherein:
v—wind speed, unit: m/s;
k-measuring the flow coefficient of the device;
Δp—differential pressure in Pa;
ρ—gas density, unit: kg/m3.
However, it should be noted that, because the pipe diameter of the air inlet pipe section 21 in the coal-fired unit is large and the air inlet pipe section 21 is bent and extended, the structure is complex, the flow velocity field formed in the air inlet pipe section 21 is unstable, the flow velocity is low, and the common differential pressure measuring device for wind speed, such as a single venturi tube, cannot measure the wind speed in the air inlet pipe section 21 stably and with high precision.
According to the utility model, the double venturi tube is adopted to measure the differential pressure in the air inlet pipe section 21, when the air flow at the outlet of the fan 10 flows through the double venturi tube, and part of the air flow flows into the outer venturi tube 31, the air flow flows through the throat 311 due to the venturi effect, the flow speed is high, the air pressure is low, therefore, the throat 311 of the outer venturi tube 31 generates a suction effect on the air flow flowing into the inner venturi tube 32, the flow speed of the air flow in the inner venturi tube 32 is improved, the air pressure in the inner venturi tube 32 is obviously reduced, the differential pressure of the air flow flowing through the air inlet pipe section 21 is amplified, the air flow entering the inner venturi tube 32 can be rectified, the air flow in the inner venturi tube 32 is enabled to be more stable, the differential pressure transmitter 33 can generate stable and high-precision differential pressure data, and the first air speed measurer 30 and the second air speed measurer 40 can acquire stable and high-precision air speed data.
According to some preferred embodiments of the present utility model, referring to fig. 4, the second wind speed measurer 40 is four, and the four second wind speed measurers 40 are symmetrically arranged around the center of the radial surface 2101. Further, the shape enclosed by the four second anemometers 40 is the same as the shape of the radial surface 2101. For example, the radial surface 2101 is arranged approximately square, and the four second anemometers 40 are also arranged approximately square. In this way, the second wind speed measurer 40 is distributed more dispersedly, has a smaller number, is lower in cost, has a smaller flow resistance to the airflow, and does not affect the normal flow of the airflow.
According to some preferred embodiments of the present utility model, referring to fig. 1 and 2, the air intake section 21 includes a first arcuate section 211 and a second arcuate section 212. The first arc-shaped section 211 extends in an arc shape and is recessed towards a first direction, one end of the first arc-shaped section 211 is communicated with the outlet of the fan 10, and the end is provided with the first wind speed measurer 30 and the second wind speed measurer 40. The second arc-shaped section 212 extends in an arc shape and is recessed toward a second direction opposite to the first direction, and the second arc-shaped section 212 is communicated with the other end of the first arc-shaped section 211. In this way, the wind speed data measured by the first wind speed measurer 30 and the second wind speed measurer 40 can accurately reflect the wind speed at the outlet of the fan 10.
Further, the air supply duct 20 further includes a right-angle elbow 22 and an air supply duct section 23. The supply pipe section 23 communicates with the second arcuate section 212 through the elbow 22. In this way, the air supply pipeline 20 is convenient to arrange and supply air to the coal-fired boiler 900.
Further, the fan monitoring device 100 further includes a first processor, which is respectively connected to the first wind speed measurer 30 and the plurality of second wind speed measurers 40, and is configured to determine a wind speed at the outlet of the fan 10 according to an average value of the plurality of second wind speed data measured by the plurality of second wind speed measurers 40 and the first wind speed data measured by the first wind speed measurer 30.
It will be appreciated that, because the dual venturi tube amplifies the differential pressure in the air intake pipe 21, the differential pressure signal formed by the differential pressure transmitter 33 generates data jitter, so that the resulting wind speed data has errors or distortions. In the present utility model, the second wind speed measuring devices 40 and the first wind speed measuring devices 30 are arranged in the above manner, and the average value thereof is calculated, so that the measured data can be compensated, thereby the wind speed at the outlet of the fan 10 obtained by final calculation is more accurate, and the subsequent calculation of the wind volume at the outlet of the fan 10 is convenient.
Further, the fan monitoring device 100 further includes a second processor, where the second processor is connected to the first processor, and is configured to determine the air volume at the outlet of the fan 10 according to the air speed and the sectional area of the radial surface 2101.
The present utility model also provides a coal-fired unit, referring to FIG. 1, comprising a coal-fired boiler 900 and a fan monitoring apparatus 100 as described above. The air supply pipeline 20 is communicated with the coal-fired boiler 900 and is used for blowing coal dust to the coal-fired boiler 900 so as to enable the coal-fired boiler 900 to burn and generate power.
Further, the coal-fired unit further comprises a muffler 800, and the muffler 800 is disposed upstream of the fan 10 and is communicated with the fan 10, so as to reduce noise when the fan 10 sends air.
It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The advantages of the present utility model have been fully and effectively realized. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.
Claims (10)
1. Fan monitoring devices, its characterized in that includes:
the fan is provided with an outlet for air out;
the air supply pipeline is provided with an air inlet pipe section which extends in a bending mode, and the air inlet pipe section is communicated with the outlet; the method comprises the steps of,
the first wind speed measurer and the second wind speed measurers are arranged on the same radial surface in the air inlet pipe section and are adjacent to the outlet and used for measuring the wind speed at the outlet, the first wind speed measurer is adjacent to the center of the radial surface, and the second wind speed measurers are arranged around the periphery of the first wind speed measurer in a cross shape.
2. The fan monitoring device of claim 1, wherein the first wind speed measurer and the second wind speed measurer each comprise:
an outer venturi;
the inner venturi tube is sleeved in the outer venturi tube and positioned in front of the throat part of the outer venturi tube along the air inlet direction;
a differential pressure transmitter;
the outer impulse pipe is respectively communicated with the outer venturi pipe and the differential pressure transmitter;
the inner impulse pipe is respectively communicated with the inner venturi pipe and the differential pressure transmitter; and
and the controller is connected with the differential pressure transmitter and is used for determining the wind speed according to the differential pressure of the outer impulse pipe and the inner impulse pipe.
3. A fan monitoring device according to claim 1 or 2, wherein the number of the second wind speed measuring devices is four, and the four second wind speed measuring devices are arranged symmetrically around the center of the radial surface.
4. A fan monitoring device according to claim 3, wherein the four second wind speed gauges enclose the same shape as the radial surface.
5. The fan monitoring device of claim 3, further comprising a first processor coupled to the first wind speed measurer and the plurality of second wind speed measurers, respectively, for determining a wind speed at the fan outlet based on an average of the plurality of second wind speed data measured by the plurality of second wind speed measurers and the first wind speed data measured by the first wind speed measurer.
6. The fan monitoring device of claim 5, further comprising a second processor coupled to the first processor for determining the air volume at the fan outlet based on the air velocity and the cross-sectional area of the radial surface.
7. The fan monitoring device of claim 1, wherein the air intake pipe section comprises a first arcuate section and a second arcuate section, the first arcuate section extends arcuately and is concave toward a first direction, one end of the first arcuate section is in communication with the fan outlet and is provided with the first wind speed measurer and the second wind speed measurer, the second arcuate section extends arcuately and is concave toward a second direction opposite the first direction, and the second arcuate section is in communication with the other end of the first arcuate section.
8. The blower monitor of claim 7 wherein said air supply duct further includes a right angle elbow and an air supply duct section, said air supply duct section communicating with said second arcuate section through said right angle elbow.
9. Coal-fired unit, its characterized in that includes:
a coal-fired boiler; and
the fan monitoring apparatus as claimed in any one of claims 1 to 8, wherein the air supply duct communicates with the coal-fired boiler for blowing pulverized coal toward the coal-fired boiler.
10. The coal-fired unit according to claim 9, comprising a muffler disposed upstream of and in communication with the fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321734837.XU CN220505366U (en) | 2023-07-04 | 2023-07-04 | Coal-fired unit and fan monitoring device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321734837.XU CN220505366U (en) | 2023-07-04 | 2023-07-04 | Coal-fired unit and fan monitoring device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220505366U true CN220505366U (en) | 2024-02-20 |
Family
ID=89881800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321734837.XU Active CN220505366U (en) | 2023-07-04 | 2023-07-04 | Coal-fired unit and fan monitoring device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220505366U (en) |
-
2023
- 2023-07-04 CN CN202321734837.XU patent/CN220505366U/en active Active
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