CN215677736U - Continuous sampling-detecting-sample returning device of online ash meter - Google Patents
Continuous sampling-detecting-sample returning device of online ash meter Download PDFInfo
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- CN215677736U CN215677736U CN202120460658.6U CN202120460658U CN215677736U CN 215677736 U CN215677736 U CN 215677736U CN 202120460658 U CN202120460658 U CN 202120460658U CN 215677736 U CN215677736 U CN 215677736U
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- chute
- coal
- wear
- feed back
- back baffle
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- 239000003245 coal Substances 0.000 claims abstract description 80
- 239000004698 Polyethylene Substances 0.000 claims abstract description 39
- -1 polyethylene Polymers 0.000 claims abstract description 39
- 229920000573 polyethylene Polymers 0.000 claims abstract description 39
- 238000005070 sampling Methods 0.000 claims abstract description 30
- 230000002285 radioactive effect Effects 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 238000002360 preparation method Methods 0.000 claims abstract description 14
- 230000005484 gravity Effects 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims description 23
- 230000000694 effects Effects 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 239000002390 adhesive tape Substances 0.000 abstract description 6
- 239000002956 ash Substances 0.000 description 52
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000005056 compaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- LXQXZNRPTYVCNG-YPZZEJLDSA-N americium-241 Chemical compound [241Am] LXQXZNRPTYVCNG-YPZZEJLDSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- TVFDJXOCXUVLDH-RNFDNDRNSA-N cesium-137 Chemical compound [137Cs] TVFDJXOCXUVLDH-RNFDNDRNSA-N 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model relates to the field of continuous sampling-detecting-sample returning of an online ash meter for a coal preparation plant, and discloses a continuous sampling-detecting-sample returning device of the online ash meter. Coal flows through the sampling port, enters the upper spiral conveyor and is conveyed to the discharge end of the upper spiral conveyor, the coal flows fall into the lower spiral conveyor under the action of gravity of the coal flow coal sample and is conveyed into the wear-resistant polyethylene measuring tube, the detector and the radioactive source of the ash content meter are respectively positioned at the upper end and the lower end of the wear-resistant polyethylene measuring tube, and the coal flow after measurement returns to the chute through the chute discharge hole and the feed back baffle. The device can eliminate the influence of external factors such as steel wires, coal bed compactness, thickness and the like on ash content measurement in the adhesive tape, and can obviously improve the measurement precision and accuracy of the online ash meter.
Description
Technical Field
The utility model relates to the field of continuous sampling-detecting-sample returning of an online ash meter for a coal preparation plant, in particular to a continuous sampling-detecting-sample returning device of the online ash meter.
Background
In the coal preparation industry, the most important products of both a power coal preparation plant and a coking coal preparation plant are clean coal, the most important quality index of the clean coal product is clean coal product ash content, and the ash content represents the quality of the clean coal product, so that the real-time detection of the ash content of the clean coal product is very important in the daily production of the coal preparation plant. The main technology and means for detecting the ash content of the clean coal are a radioactive isotope on-line ash detector, namely, the radioactive isotope on-line ash detector is installed on a clean coal belt, two groups of gamma rays with different energies released by americium 241 and cesium 137 radioactive sources penetrate through a coal bed, the absorption coefficients of the rays are different due to the different densities of combustible coal and the remaining non-combustible minerals, the size of the remaining energy of the radioactive source rays is detected by a detector, the energy absorbed by the current coal bed on the rays is calculated, and the energy is converted into the corresponding ash content, so that the current ash content of the clean coal is detected.
In fact, the online radioactive isotope ash meter has more factors influencing the measurement precision and accuracy in the use process, because the current online radioactive isotope ash meter is arranged on a belt, the steel wire is generally embedded in the adhesive tape of the belt conveyor and used for enhancing the tensile resistance of the adhesive tape, the density of the steel wire is high, the absorption coefficient to rays is large, the steel wire is not uniformly and continuously distributed along the cross section of the adhesive tape, when the rays pass through the steel wire, the attenuation is large, the attenuation is not reduced through the steel wire, and the influence on ash detection is large; the clean coal enters the belt conveyor after being dehydrated by the previous centrifugal dehydrator, the accumulation state of the clean coal on the rubber belt of the belt conveyor is irregular, the thickness of the coal bed is not uniform, and the attenuation intensity of the clean coal is different when the ray passes through the coal beds with different thicknesses, so that the ash content detection is inaccurate; due to the fact that coal flows are irregularly and unevenly stacked on an adhesive tape of a belt conveyor, the compaction degree of each coal flow on the adhesive tape is different, some local coal layers are more compact and have small void degree and large absorption to rays, some local coal layers are looser and have large void degree and small absorption to rays, and ash content measured by clean coal is different. Therefore, the external factors influencing the measurement precision and accuracy of the radioactive isotope on-line ash measuring instrument are more and have larger influence. With the continuous promotion of the capacity policy of China, and fewer newly-built coal preparation plants, in order to realize the efficient and full utilization of resources, the China advocates and improves the washing rate of raw coal vigorously, and because the past coal preparation plants do not consider the rapid development of intelligent control in the coal preparation industry during the design, many existing coal preparation plants cannot install radioactive isotope on-line ash meters on clean coal belts or the space of coal preparation plant buildings is insufficient; through the analysis, when the radioactive isotope on-line ash meter arranged on the clean coal belt detects the clean coal ash, the interference of a plurality of external factors exists. In order to overcome the defects, only a radioactive isotope on-line ash detector needs to be installed in a small space, the influence of external factors on the radioactive isotope on-line ash detector is eliminated, and the measurement precision and accuracy of the on-line ash detector are improved.
Disclosure of Invention
The utility model provides a continuous sampling-detecting-sample returning device of an online ash meter for overcoming the defects of the prior art, and the device is stable and reliable, flexible to adjust, convenient to use, high in automation degree and low in required hardware investment.
In order to achieve the purpose, the utility model adopts the following technical measures:
the continuous sampling-detecting-sample returning device of the online ash detector is characterized in that: the device comprises a chute, a sampling port, an upper screw conveyor, an upper screw conveying channel, a lower screw conveying channel, a feed back baffle hinge, a wear-resistant polyethylene measuring tube, a radioisotope online ash analyzer, a lower screw conveyor, a feed back baffle, a chute feeding hole and a chute discharging hole; the on-line ash content instrument of the radioactive isotope is composed of an ash content instrument detector, an ash content instrument radioactive source and an ash content instrument frame. One side of the chute is provided with a hole to form the chute feeding hole, the chute feeding hole is exactly consistent with the cross section size of the feeding end of the upper screw conveyor, so that the feeding end of the upper screw conveyor can be well matched with the feeding hole of the chute and welded and fixed together, the sampling port is arranged at the inner side of the feeding hole close to the chute, the right side of the sampling port is square and provided with a round hole, the round hole is just tangent to four sides of the square, the size of the round hole is consistent with the size of the chute feeding hole, the bottom end of the sampling port is reliably welded and fixed together with the bottommost end of the feeding hole of the chute and the feeding end of the upper screw conveyor, the upper end of the sampling port is square and open, so that the sampling from the falling coal flow is facilitated, and meanwhile, the leftmost side of the upper end of the sampling port is positioned at 1/3 parts of the cross section of the chute, the coal sample can be fully collected and representative, the leftmost side of the upper end of the sampling port cannot be close to the middle of the cross section of the chute, and the blockage of the coal flow in the chute due to the fact that the sampling port occupies 1/2 cross sectional area in the chute is avoided. Coal flows through the sampling port to the feeding end of the upper screw conveyer, enters the upper screw conveyer, is conveyed by the upper screw conveyer and is conveyed to the discharging end of the upper screw conveyer, under the action of the gravity of the coal flow coal sample, the coal flow falls to the feeding end of the lower spiral conveyor, and is conveyed into the wear-resistant polyethylene measuring pipe through the conveying of the lower screw conveyer and the discharge end of the lower screw conveyer, the feeding end of the wear-resistant polyethylene measuring pipe is connected with the outlet end of the lower spiral conveyor, the discharging end is connected with the chute discharging hole, the size of the chute discharging hole is consistent with that of the discharging end of the wear-resistant polyethylene measuring pipe, and the chute discharge holes are reliably connected and fixed together, the feed back baffle is reliably connected with the chute discharge holes, and the feed back baffle is reliably fixed on the chute wall through the feed back baffle hinge.
Wear-resisting polyethylene surveys buret and adopts the preparation of the polyethylene material of ultra high molecular weight, and its density is lower, and the ray pierces through easily, and the decay is little, and the wearability is good, wear-resisting polyethylene surveys buret for can be better be convenient for the accurate measurement of the online ash detector of radioisotope, and with screw conveyer's reliable connection down, wear-resisting polyethylene surveys buret cross-section and is circular, but surveys the upper portion and the lower part of buret and cut level, is convenient for the ash content appearance detector with the installation of ash content appearance radiation source.
The length and width of the feed back baffle are slightly larger than those of the chute discharging hole, the upper end of the feed back baffle is fixed on the chute wall through the feed back baffle hinge, and the feed back baffle is parallel to the chute wall and is attached to the chute discharging hole under the action of self gravity; when the coal sample was followed when the discharge end output of wear-resisting polyethylene survey buret under screw conveyer's the transport thrust effect, overcome the self gravity of feed back baffle backs up the feed back baffle, the coal sample is got back to in the chute, simultaneously, the effect of feed back baffle can be so wear-resisting polyethylene surveys buret is full of the coal sample, and the coal sample is in wear-resisting polyethylene surveys buret's compactness remains unchanged.
Drawings
FIG. 1 is a schematic view of an on-line continuous sampling-detecting-returning device of an ash detector of the device;
FIG. 2 is a top view of an on-line continuous sampling-detecting-returning device of the present device;
FIG. 3 is a schematic view of a wear-resistant polyethylene measurement tube, an ash detector and a radioactive source in the device;
FIG. 4 is a schematic view of an on-line ash detector for radioactive isotope;
FIG. 5 is a schematic view of a sampling port and a chute feed hole in the device;
FIG. 6 is a schematic view of a feed back baffle plate and a chute discharge hole in the device;
the reference numerals in the figures have the following meanings:
1-chute 2-coal flow direction
3-sampling port 4-upper screw conveyer
5-upper and lower spiral conveying channel 6-wear-resistant polyethylene measuring tube
7-ash content instrument detector 8-lower screw conveyer
9-ash content appearance radiation source 10-ash content appearance frame
11-feed back baffle 12-chute feed inlet
13-feed back baffle hinge 14-chute discharge hole
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and fig. 2, a continuous sampling-detecting-sample returning device of an on-line ash meter is characterized in that: the device comprises a chute 1, a sampling port 3, an upper screw conveyor 4, an upper screw conveying channel and a lower screw conveying channel 5, a feed back baffle hinge 13, a wear-resistant polyethylene measuring pipe 6, a lower screw conveyor 8 and a feed back baffle 11; as shown in fig. 4, the radioactive isotope online ash content analyzer is composed of an ash content analyzer detector 7, an ash content analyzer radioactive source 9, an ash content analyzer rack 10, a chute feeding hole 12 and a chute discharging hole 14. As shown in fig. 1 (front view) and fig. 2 (top view), one side of the chute 1 is perforated to form the chute feeding hole 12, the chute feeding hole 12 is exactly the same as the cross section of the feeding end of the upper screw conveyor 4, so that the feeding end of the upper screw conveyor 4 can be well matched with the chute feeding hole 12 and welded and fixed together, as shown in fig. 5, the sampling port 3 is arranged at the position, close to the inner side of the chute 1, of the chute feeding hole 12, the right side of the sampling port 3 is square-shaped and is provided with a round hole, the round hole is exactly tangent to four sides of the square, the size of the round hole is the same as the size of the chute feeding hole 12, as shown in fig. 5, the bottom end of the sampling port 3 is reliably welded and fixed with the bottommost end of the chute feeding hole 12 and the feeding end of the upper screw conveyor 4, and the upper end of the sampling port 3 is square-shaped, and open, be convenient for follow the sample in the coal flow of whereabouts, simultaneously, the leftmost side in the sampling port 3 upper end is located 1/3 department of chute 1 cross section, guarantees that the coal sample can be gathered fully and representative, the leftmost side in the sampling port 3 upper end can not be close to the middle department of chute 1 cross section, avoids because the sampling port 3 occupies 1/2 cross-sectional area in the chute 1 and causes the coal flow to be in the jam in the chute 1. Coal flow passes through the sampling port 3, comes to the feeding end of the upper spiral conveyor 4, enters the upper spiral conveyor 4, is conveyed to the discharging end of the upper spiral conveyor 4 by the upper spiral conveyor 4, falls to the feeding end of the lower spiral conveyor 8 under the action of gravity of a coal flow coal sample, is conveyed into the wear-resistant polyethylene measuring pipe 6 by the discharging end of the lower spiral conveyor 8 through the conveying of the lower spiral conveyor 8, is connected with the outlet end of the lower spiral conveyor 8 by the feeding end of the wear-resistant polyethylene measuring pipe 6, is connected with the chute discharging hole 14 by the discharging end, has the same size as the discharging end of the wear-resistant polyethylene measuring pipe 6, is shown in fig. 6 and is reliably connected and fixed together, and the chute discharging hole 14 is reliably connected with the feed back baffle 11, the feed back baffle 11 is reliably fixed on the wall of the chute 1 through the feed back baffle hinge 13.
Wear-resisting polyethylene surveys buret 6 and adopts the preparation of the polyethylene material of ultra high molecular weight, and its density is lower, and the ray pierces through easily, and the decay is little, and the wearability is good, wear-resisting polyethylene surveys buret 6 for can be better being convenient for the accurate measurement of the online ash detector of radioisotope, and with screw conveyer 8's reliable connection down, wear-resisting polyethylene surveys buret 6 cross-section and is circular, but the upper portion and the lower part of surveying buret cut level, as shown in fig. 3, be convenient for ash content appearance detector 7 with the installation of ash content appearance radiation source 9.
As shown in fig. 6, the length and width dimensions of the return baffle 11 are slightly larger than those of the chute discharge hole 14, as shown in fig. 1, fig. 2 and fig. 6, the upper end of the return baffle is fixed on the wall of the chute 1 through the return baffle hinge 13, and under the action of self gravity, the return baffle is parallel to the wall of the chute 1 and is attached to the chute discharge hole 14; when the coal sample was followed during the discharge end output of wear-resisting polyethylene survey buret 6 screw conveyer 8's transport thrust effect down, overcome feed back baffle 11's self gravity backs up feed back baffle 11, the coal sample gets back to in the chute 1, simultaneously, feed back baffle 11's effect can make wear-resisting polyethylene surveys buret 6 is full of the coal sample, and the coal sample is in wear-resisting polyethylene surveys buret 6's compactness and keeps unchangeable.
The device is arranged in a chute where coal flow falls, but not in a belt conveyor, so that the measurement influence of a steel wire in the belt conveyor on the radioactive isotope on-line ash meter is eliminated; the conveying speed of the spiral conveyor is smooth and balanced, and the coal sample is conveyed by the upper spiral conveyor and the lower spiral conveyor, so that the stacking looseness of the coal sample in the wear-resistant polyethylene measuring pipe 6 can be ensured all the time, and the influence of the compaction degree on the measurement of the ash content of the clean coal is eliminated; in order to eliminate the influence of the thickness of the coal bed on the ash content measurement of clean coal, the wear-resistant polyethylene measuring tube 6 is specially arranged to ensure that the thickness of the measured coal bed is consistent, so that the influence of external factors of the radioactive isotope on-line ash content measuring instrument on the ash content measurement is eliminated, and the measurement precision and accuracy of the on-line ash content measuring instrument are improved.
Claims (3)
1. The continuous sampling-detecting-sample returning device of the online ash detector is characterized in that: the device comprises a chute, a sampling port, an upper screw conveyor, an upper screw conveying channel, a lower screw conveying channel, a feed back baffle hinge, a wear-resistant polyethylene measuring tube, a radioisotope online ash analyzer, a lower screw conveyor, a feed back baffle, a chute feeding hole and a chute discharging hole; the radioactive isotope on-line ash content instrument consists of an ash content instrument detector, an ash content instrument radioactive source and an ash content instrument frame; one side of the chute is provided with a hole to form the chute feeding hole, the chute feeding hole is exactly consistent with the cross section size of the feeding end of the upper screw conveyor, so that the feeding end of the upper screw conveyor can be well matched with the feeding hole of the chute and welded and fixed together, the sampling port is arranged at the inner side of the feeding hole close to the chute, the right side of the sampling port is square and provided with a round hole, the round hole is just tangent to four sides of the square, the size of the round hole is consistent with the size of the chute feeding hole, the bottom end of the sampling port is reliably welded and fixed together with the bottommost end of the feeding hole of the chute and the feeding end of the upper screw conveyor, the upper end of the sampling port is square and open, so that the sampling from the falling coal flow is facilitated, and meanwhile, the leftmost side of the upper end of the sampling port is positioned at 1/3 parts of the cross section of the chute, the coal sample can be fully collected and representative; coal flows through the sampling port to the feeding end of the upper screw conveyer, enters the upper screw conveyer, is conveyed by the upper screw conveyer and is conveyed to the discharging end of the upper screw conveyer, under the action of the gravity of the coal flow coal sample, the coal flow falls to the feeding end of the lower spiral conveyor, and is conveyed into the wear-resistant polyethylene measuring pipe through the conveying of the lower screw conveyer and the discharge end of the lower screw conveyer, the feeding end of the wear-resistant polyethylene measuring pipe is connected with the outlet end of the lower spiral conveyor, the discharging end is connected with the chute discharging hole, the size of the chute discharging hole is consistent with that of the discharging end of the wear-resistant polyethylene measuring pipe, and the chute discharge holes are reliably connected and fixed together, the feed back baffle is reliably connected with the chute discharge holes, and the feed back baffle is reliably fixed on the chute wall through the feed back baffle hinge.
2. The continuous sampling-detecting-sample returning device of the on-line ash meter as claimed in claim 1, wherein: wear-resisting polyethylene surveys buret and adopts the preparation of the polyethylene material of ultra high molecular weight, and its density is lower, and the ray pierces through easily, and the decay is little, and the wearability is good, wear-resisting polyethylene surveys buret for can be better be convenient for the accurate measurement of the online ash detector of radioisotope, and with screw conveyer's reliable connection down, wear-resisting polyethylene surveys buret cross-section and is circular, but surveys the upper portion and the lower part of buret and cut level, is convenient for the ash content appearance detector with the installation of ash content appearance radiation source.
3. The continuous sampling-detecting-sample returning device of the on-line ash meter as claimed in claim 1, wherein: the length and width of the feed back baffle are slightly larger than those of the chute discharging hole, the upper end of the feed back baffle is fixed on the chute wall through the feed back baffle hinge, and the feed back baffle is parallel to the chute wall and is attached to the chute discharging hole under the action of self gravity; when the coal sample was followed when the discharge end output of wear-resisting polyethylene survey buret under screw conveyer's the transport thrust effect, overcome the self gravity of feed back baffle backs up the feed back baffle, the coal sample is got back to in the chute, simultaneously, the effect of feed back baffle can be so wear-resisting polyethylene surveys buret is full of the coal sample, and the coal sample is in wear-resisting polyethylene surveys buret's compactness remains unchanged.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120460658.6U CN215677736U (en) | 2021-03-03 | 2021-03-03 | Continuous sampling-detecting-sample returning device of online ash meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120460658.6U CN215677736U (en) | 2021-03-03 | 2021-03-03 | Continuous sampling-detecting-sample returning device of online ash meter |
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| Publication Number | Publication Date |
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| CN215677736U true CN215677736U (en) | 2022-01-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834289A (en) * | 2021-03-03 | 2021-05-25 | 安徽理工大学 | Continuous sampling-detecting-sample returning device of online ash meter |
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2021
- 2021-03-03 CN CN202120460658.6U patent/CN215677736U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834289A (en) * | 2021-03-03 | 2021-05-25 | 安徽理工大学 | Continuous sampling-detecting-sample returning device of online ash meter |
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Granted publication date: 20220128 |