CN112284987A - Pulverized coal fineness measurement system - Google Patents
Pulverized coal fineness measurement system Download PDFInfo
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- CN112284987A CN112284987A CN202010903911.0A CN202010903911A CN112284987A CN 112284987 A CN112284987 A CN 112284987A CN 202010903911 A CN202010903911 A CN 202010903911A CN 112284987 A CN112284987 A CN 112284987A
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- 239000003245 coal Substances 0.000 title claims abstract description 143
- 238000005259 measurement Methods 0.000 title claims abstract description 38
- 239000000843 powder Substances 0.000 claims abstract description 156
- 238000005070 sampling Methods 0.000 claims abstract description 59
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 24
- 238000001514 detection method Methods 0.000 abstract description 3
- 239000008187 granular material Substances 0.000 abstract 1
- 239000002817 coal dust Substances 0.000 description 30
- 239000007789 gas Substances 0.000 description 23
- 238000004458 analytical method Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000005431 greenhouse gas Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002864 coal component Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
- G01N15/0227—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging using imaging, e.g. a projected image of suspension; using holography
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Abstract
The application relates to a pulverized coal fineness measurement system, which belongs to the technical field of pulverized coal fineness detection and comprises a sampling gun fixedly arranged on a vertical pulverized coal pipeline, wherein one end of the sampling gun, which is far away from the pulverized coal pipeline, is communicated with a cyclone separator; the upper part of the cyclone separator is provided with a second powder outlet pipe communicated with the cyclone separator, and the bottom end of the cyclone separator is provided with a first powder collecting pipe communicated with the cyclone separator; one end of the first powder collecting pipe, which is far away from the cyclone separator, is horizontally bent and communicated with a measuring box, a plurality of shooting cameras positioned in different directions are arranged inside the measuring box, and a light source is also arranged in the measuring box; the bottom of the measuring box is provided with a first powder outlet pipe communicated with the measuring box. This application is measured the buggy from a plurality of azimuths, reduces because of the shielding of large granule leads to the probability that the tiny particle can not caught by the camera of shooing, has improved the degree of accuracy that the buggy fineness was measured.
Description
Technical Field
The application relates to the field of pulverized coal fineness detection, in particular to a pulverized coal fineness measurement system.
Background
The fineness of the coal dust refers to the mass percentage or the number percentage of particles with different diameters in the coal dust, and the larger the fineness is, the thicker the coal dust is. Generally, the improvement of the fineness of the coal dust is to thin the coal dust so as to enable the coal dust to be easier to catch fire, complete to burn, reduce the carbon content of fly ash and reduce the possibility of secondary combustion; meanwhile, the flame center of the boiler hearth is relatively lowered, and the furnace efficiency is relatively raised. However, increasing the fineness of the pulverized coal increases the power consumption of the pulverizing system and the wear of the coal mill. Therefore, the fineness of the pulverized coal needs to be checked to determine a proper range so as to obtain the maximum economic output.
The utility model discloses a china that current grant bulletin number is CN207636444U utility model discloses a coal-fired particle size distribution on-line measuring device of power plant, be arranged in from coal-fired power plant income sampling pipe 2 of sampling in the primary air powder conveying pipeline of stove buggy process, the entrance point of one side of cyclone 3 is connected to the sampling pipe 2 other end, the import of the upper end of sampling classifier 4 of below is connected to the exit end of cyclone 3 lower extreme, the export of the lower extreme of sampling classifier 4 communicates to first time powder pipeline 8, 8 one end of first time powder pipeline communicates to a primary air powder conveying pipeline, the other end is used for connecting the air supply, sampling classifier 4 includes transparent sampling area, one side of sampling area is provided with shoots camera 5, the opposite side is provided with light source 6, shoot camera connection server.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: due to the fact that the coal powder is different in particle size when the coal powder descends in the sampling area, the coal powder with the large particle size on the same horizontal plane is prone to blocking the coal powder with the small particle size, accordingly, the blocked coal powder cannot be shot by a camera, statistics of the content of the coal powder with the large particle size is too high during system analysis, and the fineness of the coal powder is large.
Disclosure of Invention
In order to improve the accuracy of buggy fineness detection, this application provides a buggy fineness measurement system.
The application provides a pulverized coal fineness measurement system adopts following technical scheme:
a pulverized coal fineness measuring system comprises a sampling gun fixedly arranged on a vertical pulverized coal pipeline, wherein one end of the sampling gun, which is far away from the pulverized coal pipeline, is communicated with a cyclone separator; the upper part of the cyclone separator is provided with a second powder outlet pipe communicated with the cyclone separator, and the bottom end of the cyclone separator is provided with a first powder collecting pipe communicated with the cyclone separator; one end of the first powder collecting pipe, which is far away from the cyclone separator, is horizontally bent and communicated with a measuring box, a plurality of shooting cameras positioned in different directions are arranged inside the measuring box, and a light source is also arranged in the measuring box; the bottom of the measuring box is provided with a first powder outlet pipe communicated with the measuring box.
By adopting the technical scheme, the shooting cameras are arranged in a plurality of directions in the measuring box, each shooting camera can capture coal dust particles, and the coal dust fineness is obtained in multiple directions, so that the error that the fineness is larger due to the fact that the coal dust with large particle size shields the coal dust with small particle size when the coal dust is shot in a single direction is obviously reduced, and the accuracy of coal dust fineness measurement is improved. The coal pulverizer can be operated and guided by the operation personnel according to the more accurately obtained particle size distribution condition of pulverized coal particles and the change condition of the pulverized coal fineness along with time, the output of the coal pulverizer is adjusted in time, the coal with the proper pulverized coal particle thickness ratio is obtained, the air distribution ratio of the boiler is adjusted, the optimized combustion working condition and the economical operation of the coal are realized, the pulverized coal can be kept in high-efficiency energy-saving combustion, and the pollution and the emission of greenhouse gases can be reduced.
Preferably, a high-temperature compressed air pipe which is communicated with the first powder collecting pipe and extends obliquely upwards is fixedly arranged above the bent part of the first powder collecting pipe and away from the measuring box; and one end of the high-temperature compressed air pipe, which is far away from the first powder collecting pipe, is connected with high-temperature compressed gas production equipment.
By adopting the technical scheme, the coal powder is dried and dispersed; because the buggy itself has certain moisture to also the adhesion is in the same place easily, consequently utilize the intraductal high temperature compressed gas of high temperature compressed gas will be blown into the measurement box by the buggy of whereabouts in the first powder collection pipe in, because gas temperature is high, pressure is big for the buggy is blown away under the effect of high-pressure draught after being dried, avoids the adhesion of buggy, makes the buggy distribute more evenly in the measurement box, and the image information of shooting camera record is more accurate.
Preferably, the temperature of the high-temperature compressed gas in the high-temperature compressed gas pipe is between 100 and 150 ℃.
By adopting the technical scheme, the temperature of the high-temperature compressed gas is kept at the temperature capable of drying the pulverized coal, so that the heat waste caused by overhigh temperature is avoided.
Preferably, the position, far away from the measuring box, of the bent part of the first powder collecting pipe is fixedly provided with an air inlet pipe communicated with the first powder collecting pipe, and one end, far away from the first powder collecting pipe, of the air inlet pipe is connected with equipment for generating compressed air.
By adopting the technical scheme, compressed gas in the air inlet pipe enables coal dust entering the measuring box to be uniformly dispersed, and inaccurate image data acquired by the shooting camera due to the fact that the coal dust is concentrated together is avoided.
Preferably, a heating sleeve is fixedly sleeved on the outer wall of the upper part of the cyclone separator.
By adopting the technical scheme, the pulverized coal is dried, and the pulverized coal is blown away by the compressed gas in the air inlet pipe more easily.
Preferably, a transparent inner cover is arranged in the measuring box, and the shooting camera and the light source are positioned in a closed gap between the transparent inner cover and the measuring box.
By adopting the technical scheme, the pulverized coal is prevented from polluting the shooting camera and the light source, the shooting camera is protected, and the shooting accuracy is ensured.
Preferably, the cyclone separator is communicated with the first powder collecting pipe through a sampling classifier, the sampling classifier is internally provided with a cavity, and a concentration dispersion plate for dividing the cavity into different chambers is arranged in the sampling classifier; the first powder collecting pipe is communicated with one cavity, and the other cavities in the cavity are communicated with second powder collecting pipes.
By adopting the technical scheme, the sampling classifier utilizes the concentration dispersion plate to separate the coal dust collected by the cyclone separator, so that the concentration of the coal dust entering the measuring box is reduced. The sampling classifier performs secondary sampling on the coal dust, performs graded dilution on the coal dust, and obtains the coal dust with moderate concentration for measurement.
Preferably, the cavity wall of the lower part of each cavity in the sampling classifier is a cambered surface.
By adopting the technical scheme, the coal dust can enter the first powder collecting pipe and the second powder collecting pipe more easily, and the coal dust can be prevented from being accumulated in the sampling classifier.
Preferably, one end of the first powder outlet pipe, which is far away from the measuring box, and one end of the second powder collecting pipe, which is far away from the sampling classifier, are both communicated with a first powder return pipeline, one end of the first powder return pipeline is communicated with the pulverized coal pipeline, the other end of the first powder return pipeline is connected with a device for generating compressed air, and the communication position of the first powder return pipeline and the pulverized coal pipeline is positioned above the sampling gun.
Through adopting above-mentioned technical scheme, send the buggy in first play powder pipe and the second collection powder pipe back to the buggy pipeline again to send back the top that the position is located the sampling gun, can guarantee that the buggy that gets into the buggy pipeline again can not disturb the sample of below sampling gun.
Preferably, the second powder outlet pipe is communicated with a second powder return pipeline, the second powder return pipeline is communicated with the first powder return pipeline, the communicated part of the second powder return pipeline and the first powder return pipeline is close to the pulverized coal pipeline, and one end, far away from the pulverized coal pipeline, of the second powder return pipeline is connected with equipment for generating compressed air.
By adopting the technical scheme, the gas separated from the cyclone separator and the fine powder in the coal powder are sent back to the coal powder pipeline again through the second powder return pipeline.
Compared with the prior art, the pulverized coal fineness measurement system measures pulverized coal from multiple directions, reduces the probability that small particles cannot be captured by a shooting camera due to shielding of large particles, and improves the accuracy of pulverized coal fineness measurement.
Drawings
Fig. 1 is a schematic structural view of the related art;
fig. 2 is a schematic view of the overall structure of a coal fines fineness measurement system according to a first embodiment of the present application;
fig. 3 is a schematic diagram of an internal structure of a sampling classifier of the coal fines fineness measurement system according to the first embodiment of the present application;
fig. 4 is a schematic sectional structure view of a joint of a high-temperature compressed air pipe and a first powder collecting pipe of a coal fines fineness measuring system according to a first embodiment of the present application;
fig. 5 is a schematic view of the internal structure of a measurement box of a pulverized coal fineness measurement system according to a first embodiment of the present application;
fig. 6 is a schematic view of the internal structure of the measurement box of the coal fines fineness measurement system of the first embodiment of the present application in another direction;
fig. 7 is an overall configuration diagram of a pulverized coal fineness measurement system according to a second embodiment of the present application;
fig. 8 is a schematic position diagram of a heating jacket of a pulverized coal fineness measuring system according to a second embodiment of the present application.
Description of reference numerals: 1. a pulverized coal pipeline; 2. a sampling tube; 3. a cyclone separator; 4. a sampling classifier; 41. a concentration dispersion plate; 5. a shooting camera; 6. a light source; 7. a sampling gun; 8. a first powder return pipeline; 9. a second powder return pipeline; 10. a measuring box; 101. a transparent inner cover; 11. a first powder collecting pipe; 12. a second powder collecting pipe; 13. a first powder outlet pipe; 14. a second powder outlet pipe; 15. compressing the gas pipe at high temperature; 16. an air inlet pipe; 17. a negative pressure generator; 18. a control valve; 19. and (4) heating the sleeve.
Detailed Description
The present application is described in further detail below with reference to figures 2-8.
Example one
The embodiment of the application discloses a pulverized coal fineness measurement system. Referring to fig. 2 and 3, the pulverized coal fineness measurement system comprises a sampling gun 7 fixed on the vertically arranged pulverized coal pipeline 1 and used for taking pulverized coal, and the sampling gun 7 is communicated with the pulverized coal pipeline 1. The sampling gun 7 is horizontally arranged and provided with a control valve 18. In the figure, the direction of the vertical arrow is the conveying direction of the pulverized coal in the pulverized coal pipeline 1, and the horizontal arrow is the flowing direction of the compressed gas. Due to the influence of gravity on the pulverized coal, the pulverized coal is unstable in the horizontal pulverized coal pipeline 1, and the sampling representativeness is insufficient, so the sampling gun 7 is installed on the vertical pulverized coal pipeline 1.
One end of the sampling gun 7, which is far away from the pulverized coal pipeline 1, is communicated with a vertically arranged cyclone separator 3 through a pipeline. The top of the cyclone separator 3 is communicated with a second powder outlet pipe 14 which is vertically arranged, and the lower part is communicated with a sampling classifier 4. After the cyclone separator 3 is used for classification, the air and the fine powder in the coal powder enter the second powder outlet pipe 14, and the coarse powder in the coal powder enters the lower sampling classifier 4 to be measured.
One end of the second powder outlet pipe 14 far away from the cyclone separator 3 is communicated with a second powder return pipeline 9 which is horizontally arranged. One end of the second powder return pipeline 9 in the length direction is fixed on the coal powder pipeline 1 and communicated with the coal powder pipeline 1, and the other end of the second powder return pipeline is connected with equipment for generating compressed air, so that the air and fine powder in the coal powder passing through the cyclone separator 3 pass through the second powder outlet pipe 14 and the second powder return pipeline 9 and then enter the coal powder pipeline 1 again.
A negative pressure generator 17 is arranged at the position of the second powder return pipeline 9 close to the pulverized coal pipeline 1, and a control valve 18 is arranged between the negative pressure generator 17 and the pulverized coal pipeline 1.
The second powder return pipeline 9 is located above the communication position of the sampling gun 7 and the coal powder pipeline 1 at the communication position of the coal powder pipeline 1, so that fine powder entering the coal powder pipeline 1 again can not interfere with sampling of the sampling gun 7 below, and pulverized coal taken by the sampling gun 7 is consistent with pulverized coal components of a coal mill.
The sampling classifier 4 is internally provided with a cavity, and a concentration dispersion plate 41 which is fixed on the cavity wall and divides the cavity is vertically arranged in the cavity. The concentration distribution plate 41 divides the cavity into two small chambers. The cavity wall of the lower part of each chamber is an arc surface, the bottom end of one chamber is communicated with a first powder collecting pipe 11, and the bottom end of the other chamber is communicated with a second powder collecting pipe 12. One end of the second powder collecting pipe 12, which is vertically arranged and far away from the sampling classifier 4, is communicated with a first powder return pipeline 8 which is horizontally arranged, and the lower part of the first powder collecting pipe 11 is horizontally bent and communicated with a measuring box 10 which is vertically arranged. The second powder collecting pipe 12 is provided with a control valve 18.
One end of the first powder return pipeline 8 is communicated with the position, close to the pulverized coal pipeline 1, of the second powder return pipeline 9, and the other end of the first powder return pipeline is connected with equipment for generating compressed air.
The sampling classifier 4 divides the pulverized coal collected in the cyclone 3 into two by the concentration dispersing plate 41 to reduce the concentration of the pulverized coal entering the measuring chamber 10. The sampling classifier 4 performs secondary sampling on the coal dust, performs graded dilution on the coal dust, and obtains the coal dust with moderate concentration for measurement.
The coal dust entering the second dust collecting pipe 12 from the sampling classifier 4 falls into the first dust return pipeline 8, enters the second dust return pipeline 9 under the action of compressed gas, returns to the coal dust pipeline 1 again, and continues to be conveyed to the downstream of the coal dust pipeline 1.
Referring to fig. 4 and 5, the bending section of the first powder collecting pipe 11 is arc-shaped, and a high-temperature compressed air pipe 15 which is inclined upwards is arranged above the bending part of the first powder collecting pipe 11 and away from the measuring box 10. The high-temperature compressed air pipe 15 is communicated with the first powder collecting pipe 11, and one end of the high-temperature compressed air pipe, which is far away from the first powder collecting pipe 11, is connected with high-temperature compressed air production equipment. The high-temperature compressed gas in the high-temperature compressed gas pipe 15 blows the coal dust falling from the first powder collecting pipe 11 into the measuring box 10, and due to high gas temperature and high pressure, the coal dust is blown away under the action of high-pressure airflow after being dried, so that the coal dust is prevented from being adhered. The temperature of the high-temperature compressed gas is between 100 and 150 ℃.
Referring to fig. 5 and 6, a transparent inner cover 101 fixed on the wall of the measurement chamber 10 is disposed in the measurement chamber 10, and a gap is left between the transparent inner cover 101 and the wall of the measurement chamber 10. A shooting camera 5 and a light source 6 fixed on the wall of the measuring box 10 are arranged in the gap between the transparent inner cover 101 and the wall of the measuring box.
The shooting camera 5 is a high-speed camera, and can realize the rapid capture of the outline of the pulverized coal particles. At least, the upper part of the transparent inner cover 101, the box wall opposite to the powder outlet of the first powder collecting pipe 11 and one of the adjacent box walls of the box wall where the powder outlet of the first powder collecting pipe 11 are positioned are arranged, so that the pulverized coal can be photographed in different directions. The shooting camera 5 is communicated with a coal powder fineness analysis device which is used for analyzing and counting the image information acquired by the shooting camera 5.
The clearance between the transparent inner cover 101 and the box wall of measuring box 10 is the enclosure space to avoid the buggy to pollute and shoot camera 5 and light source 6, protect shooting camera 5, guarantee the accuracy of shooing.
The first powder collecting pipe 11 penetrates through the side wall of the measuring chamber 10 and then is communicated with the inside of the transparent inner cover 101, and the bottom of the transparent inner cover 101 is opened so that the inside is communicated with the inside of the measuring chamber 10, and the pulverized coal is allowed to fall into the lower part of the measuring chamber 10.
The lower part of the measuring box 10 is communicated with a first powder outlet pipe 13, and one end of the first powder outlet pipe 13 far away from the measuring box 10 is communicated with the first powder return pipeline 8. The measured pulverized coal enters the first pulverized coal return pipeline 8 and then returns to the pulverized coal pipeline 1 along the first pulverized coal return pipeline 8 and the second pulverized coal return pipeline 9 under the action of compressed gas. The first powder outlet pipe 13 is provided with a control valve 18.
In this embodiment, all the bent portions of the pipelines are arc-shaped sections, so that the pulverized coal is easier to convey in the pipelines.
The implementation principle of the coal powder fineness measurement system in the embodiment of the application is as follows: pulverized coal crushed and ground by a coal mill is collected by a sampling gun 7 in a pulverized coal pipeline 1, the collected sample enters a cyclone separator 3 to be classified, coarse powder is collected by the cyclone separator 3 and enters a sampling classifier 4 to be processed and then enters a first powder collecting pipe 11, and pulverized coal in the first powder collecting pipe 11 is blown into a measuring box 10 by high-temperature compressed gas in a high-temperature compressed gas pipe 15; the coal powder is shot by shooting cameras 5 arranged in a plurality of directions in a measuring box 10, and picture information is transmitted to coal powder fineness analysis equipment for further analysis and processing.
The fineness of the pulverized coal is an important combustion parameter, and has important influence on the combustion efficiency of the pulverized coal and the emission of pollution gas and greenhouse gas. Electric signals of particle images obtained by the shooting cameras 5 arranged in multiple directions are transmitted to the coal powder fineness analysis equipment, the fineness distribution of coal powder is counted through image analysis software, and the particle size distribution map of the coal powder particles at the moment is obtained after information obtained by each shooting camera 5 is integrated. The fineness of the coal powder is obtained in multiple directions, so that the error of large fineness caused by shielding of the coal powder with large particle size from the coal powder with small particle size when the image is shot in a single direction is obviously reduced, and the accuracy of coal powder fineness measurement is improved. The coal pulverizer can be operated and guided by the operator according to the particle size distribution of pulverized coal particles and the change of the pulverized coal fineness along with time, the output of the coal pulverizer is adjusted in time, coal with a proper pulverized coal particle thickness ratio is obtained, the air distribution ratio of a boiler is adjusted, the optimized combustion working condition and the economical operation of the coal are realized, the pulverized coal can be efficiently and energy-saving combusted, and the pollution and the emission of greenhouse gases can be reduced.
Example two
The embodiment of the application discloses a pulverized coal fineness measurement system. Referring to fig. 7 and 8, the difference from the first embodiment is that a heating jacket 19 fixed to the cyclone 3 is provided on the upper part of the cyclone 3. The heating jacket 19 dries the pulverized coal in the cyclone 3, so that the moisture in the pulverized coal is evaporated. The dried coal powder is collected by the cyclone separator 3 and then enters the sampling classifier 4 below.
The bottom of the first powder collecting pipe 11 far away from the measuring box 10 is communicated with an air inlet pipe 16 coaxial with the horizontal part of the first powder collecting pipe 11, and one end of the air inlet pipe 16 far away from the first powder collecting pipe 11 is connected with a device for generating compressed air. The compressed gas in the air inlet pipe 16 enables the pulverized coal entering the measuring box 10 to be uniformly dispersed, and the phenomenon that the pulverized coal is concentrated together to enable the image data acquired by the shooting camera 5 to be inaccurate is avoided.
The implementation principle of the coal powder fineness measurement system in the embodiment of the application is as follows: pulverized coal crushed and ground by a coal mill is collected by a sampling gun 7 in a pulverized coal pipeline 1, the collected sample enters a cyclone separator 3 to be classified and dried, the dried coarse powder is collected by the cyclone separator 3 to enter a sampling classifier 4 to be processed and then enters a first powder collecting pipe 11, and the pulverized coal in the first powder collecting pipe 11 is blown into a measuring box 10 by compressed gas in an air inlet pipe 16; the coal powder is shot by shooting cameras 5 arranged in a plurality of directions in a measuring box 10, and picture information is transmitted to coal powder fineness analysis equipment for further analysis and processing.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A pulverized coal fineness measuring system comprises a sampling gun (7) fixedly arranged on a vertical pulverized coal pipeline (1), wherein one end, far away from the pulverized coal pipeline (1), of the sampling gun (7) is communicated with a cyclone separator (3); the method is characterized in that: a second powder outlet pipe (14) communicated with the cyclone separator (3) is arranged at the upper part of the cyclone separator (3), and a first powder collecting pipe (11) communicated with the cyclone separator (3) is arranged at the bottom end of the cyclone separator (3); one end, far away from the cyclone separator (3), of the first powder collecting pipe (11) is horizontally bent and communicated with a measuring box (10), a plurality of shooting cameras (5) located in different directions are arranged inside the measuring box (10), and a light source (6) is further arranged in the measuring box (10); the bottom of the measuring box (10) is provided with a first powder outlet pipe (13) communicated with the measuring box (10).
2. The coal fines fineness measurement system of claim 1, characterized in that: a high-temperature compressed air pipe (15) which is communicated with the first powder collecting pipe (11) and extends upwards in an inclined manner is fixedly arranged above the bent part of the first powder collecting pipe (11) and away from the measuring box (10); and one end of the high-temperature compressed air pipe (15) far away from the first powder collecting pipe (11) is connected with high-temperature compressed gas production equipment.
3. The coal fines fineness measurement system of claim 2, characterized in that: the temperature of the high-temperature compressed gas in the high-temperature compressed gas pipe (15) is between 100 and 150 ℃.
4. The coal fines fineness measurement system of claim 1, characterized in that: the position, far away from the measuring box (10), of the bent part of the first powder collecting pipe (11) is fixedly provided with an air inlet pipe (16) communicated with the first powder collecting pipe (11), and one end, far away from the first powder collecting pipe (11), of the air inlet pipe (16) is connected with equipment for generating compressed air.
5. The coal fines fineness measurement system of claim 4, characterized in that: and a heating sleeve (19) is fixedly sleeved on the outer wall of the upper part of the cyclone separator (3).
6. The coal fines fineness measurement system of claim 1, characterized in that: a transparent inner cover (101) is arranged in the measuring box (10), and the shooting camera (5) and the light source (6) are located in a closed gap between the transparent inner cover (101) and the measuring box (10).
7. The coal fines fineness measurement system of claim 1, characterized in that: the cyclone separator (3) is communicated with the first powder collecting pipe (11) through a sampling classifier (4), a cavity is formed in the sampling classifier (4), and a concentration dispersion plate (41) for dividing the cavity into different chambers is arranged in the cavity; the first powder collecting pipe (11) is communicated with one chamber, and the other chambers in the cavity are communicated with a second powder collecting pipe (12).
8. The coal fines fineness measurement system of claim 7, characterized in that: the cavity wall of the lower part of each cavity in the sampling classifier (4) is a cambered surface.
9. The coal fines fineness measurement system of claim 7, characterized in that: one end of the first powder outlet pipe (13) far away from the measuring box (10) and one end of the second powder collecting pipe (12) far away from the sampling classifier (4) are communicated with a first powder return pipeline (8), one end of the first powder return pipeline (8) is communicated with the coal powder pipeline (1), the other end of the first powder return pipeline is connected with equipment for generating compressed air, and the communicated part of the first powder return pipeline (8) and the coal powder pipeline (1) is positioned above the sampling gun (7).
10. The coal fines fineness measurement system of claim 9, characterized in that: the second powder outlet pipe (14) is communicated with a second powder return pipeline (9), the second powder return pipeline (9) is communicated with the first powder return pipeline (8), the communicated part of the second powder return pipeline (9) and the first powder return pipeline (8) is close to the pulverized coal pipeline (1), and one end, far away from the pulverized coal pipeline (1), of the second powder return pipeline (9) is connected with equipment for generating compressed air.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101109A (en) * | 2021-11-29 | 2022-03-01 | 华电电力科学研究院有限公司 | Online pipeline monitoring system and method for direct-fired pulverizing system |
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