CN112007877B - On-line detection and separation system and method for radioactive pollutants - Google Patents
On-line detection and separation system and method for radioactive pollutants Download PDFInfo
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- CN112007877B CN112007877B CN202010994852.2A CN202010994852A CN112007877B CN 112007877 B CN112007877 B CN 112007877B CN 202010994852 A CN202010994852 A CN 202010994852A CN 112007877 B CN112007877 B CN 112007877B
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- 238000001514 detection method Methods 0.000 title claims abstract description 53
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 27
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 27
- 230000002285 radioactive effect Effects 0.000 title claims abstract description 27
- 238000000926 separation method Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 93
- 230000005855 radiation Effects 0.000 claims abstract description 62
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000012546 transfer Methods 0.000 claims abstract description 31
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 6
- 230000007480 spreading Effects 0.000 claims description 3
- 239000000356 contaminant Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 29
- 239000002901 radioactive waste Substances 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 230000032258 transport Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005025 nuclear technology Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000012852 risk material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/38—Collecting or arranging articles in groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C2201/00—Measures preceding sorting according to destination
- B07C2201/006—Hazardous Substances, e.g. checking for contamination, explosives, anthrax
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C2501/00—Sorting according to a characteristic or feature of the articles or material to be sorted
- B07C2501/0054—Sorting of waste or refuse
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- Sorting Of Articles (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention relates to the technical field of radioactive waste treatment devices, and discloses an online detection and separation system for radioactive pollutants.A material distribution component and a transfer component cooperate to distribute and transport materials to different positions, a feed hopper is positioned in the middle of a conveying belt, a second radiation detector can be arranged at the upstream position to carry out background measurement, environmental interference is eliminated, the radiation detection reliability is improved, and a mechanism for flattening the materials is also arranged between the feed hopper and the first radiation detector to avoid stacking of the materials to be detected; in the method for detecting and sorting the radioactive pollutants on line, the accurate demarcation of the polluted materials and the uncontaminated materials can be ensured by controlling the beat of the motor and combining the synergistic effect of the material distribution assembly and the transfer assembly, so that the fixed-distance operation of the conveyer belt and the material batch sorting are realized, the measurement of the radioactive pollutants on line detection and sorting is reliable, the sorting is accurate, and the method has great popularization value and wide application prospect.
Description
Technical Field
The invention relates to the technical field of radioactive waste treatment devices, in particular to an online detection and separation system for radioactive pollutants.
Background
With the rapid development of nuclear technology application in China, massive radioactive wastes are generated, and how to safely and effectively treat or utilize the wastes becomes a more difficult problem, and even the sustainable healthy development of nuclear energy utilization is severely restricted.
In the technical field of radioactive waste treatment devices, a large amount of special funds are put into the country to develop important subject researches related to nuclear facility retirement, radioactive waste treatment and the like, wherein the high-cost performance solution control treatment technology for the similar uniform granular radioactive pollutants in batches is one of important research directions, the rapid and high-precision detection of the radioactive pollutants is focused, and the parts which are out of standard and high in risk in the massive radioactive waste can be singly separated and exported to carry out special treatment, and other parts which meet the standard and are low in risk and even have no risk are separated and simply treated or reused.
At present, the conventional practice is to stack materials on a conveying device, and the materials always flow to a discharging end from a receiving end of the conveying device, a detecting device is arranged in the middle of the conveying device, the linear constant-speed conveying and sorting are not ideal in the technical idea of sorting accuracy, and the radiation measurement of the stacked materials is not accurate.
Therefore, a radioactive pollutant online detection and separation system with reliable measurement and accurate separation is needed in the technical field of radioactive waste treatment devices.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides an online detection and separation system for radioactive pollutants, which is reliable in measurement and accurate in separation, and provides an online detection and separation method for radioactive pollutants by using the online detection and separation system for radioactive pollutants.
The invention is realized by the following technical scheme:
The utility model provides a radioactive pollutant on-line measuring sorting system, includes by motor drive's conveyer belt, conveyer belt length direction lean on the top in position and be equipped with the feeder hopper, the conveyer belt is kept away from the top of the low reaches position of feeder hopper and is equipped with first radiation detector, first radiation detector's detection face is parallel with the conveyer belt, the below of conveyer belt discharge end is equipped with the feed divider subassembly, the below of feed divider subassembly discharge gate is equipped with and transports the subassembly, feed divider subassembly and transport subassembly synergism can divide the material to transport to different positions.
Further, the transfer assembly includes a first transfer belt and a second transfer belt having different discharge positions.
Further, the feed distribution assembly comprises a single-row-port type feed distribution hopper, a feed inlet of the single-row-port type feed distribution hopper is located below the discharge end of the conveying belt, a rotating mechanism is arranged on the side face of the single-row-port type feed distribution hopper, and the rotating mechanism can drive a discharge outlet of the single-row-port type feed distribution hopper to swing to the upper portion of the receiving end of the first transfer belt or the second transfer belt.
Further, the feed distribution assembly comprises a double-discharge type feed distribution hopper, a feed inlet of the double-discharge type feed distribution hopper is located below the tail end of the conveying belt, two discharge outlets of the double-discharge type feed distribution hopper face to the upper parts of the material receiving ends of the first transfer belt and the second transfer belt respectively, a first baffle capable of being controlled to open and close is arranged at the position, facing to the discharge outlet of the first transfer belt, of the second transfer belt, and a second baffle capable of being controlled to open and close is arranged at the position, facing to the discharge outlet of the second transfer belt.
Further, the first baffle is driven by a first reciprocating mechanism, and the second baffle is driven by a second reciprocating mechanism.
Further, the detection boundary of the first radiation detector far away from the feeding hopper is coincided with the unloading starting line of the unloading end of the conveying belt.
Further, a second radiation detector is arranged above the upstream position, away from the feeding hopper, of the conveying belt, the detection surface of the second radiation detector is parallel to the conveying belt, and the detection area of the second radiation detector is equal to that of the first radiation detector.
Further, two ends of the first radiation detector are provided with first alignment mechanisms, and the alignment direction of the first alignment mechanisms is perpendicular to the detection surface of the first radiation detector; and the two ends of the second radiation detector are provided with second collimating mechanisms, and the adjusting direction of the second collimating mechanisms is vertical to the detection surface of the second radiation detector.
Further, a spreading plate capable of limiting the height of the material is arranged between the feeding hopper and the first radiation detector and close to the feeding hopper.
The on-line detection and separation method for the radioactive pollutants utilizes the on-line detection and separation system for the radioactive pollutants, and comprises the following steps:
A. starting the motor to enable the conveyor belt to run, and starting the first irradiation detector;
B. the materials to be detected and sorted fall on a conveying belt through the feeding hopper;
C. The conveyor belt conveys the material to the position below the first irradiation detector;
D. The first irradiation detector judges whether the materials are polluted or not, the judging time is t1, and the material distributing component and the transferring component determine the positions for distributing the materials according to the judging result;
E. the conveyor belt runs at a fixed distance, wherein the running distance is the length L of the detection range of the first radiation detector in the conveying direction of the conveyor belt;
F. And D, stopping the motor, returning to the step D and cycling.
Compared with the prior art, the invention has the following advantages and beneficial effects:
The invention comprises a conveyer belt driven by a motor, wherein a feed hopper is arranged above a middle position of the conveyer belt in the length direction, a first radiation detector is arranged above a downstream position of the conveyer belt away from the feed hopper, a detection surface of the first radiation detector is parallel to the conveyer belt, a material distributing component is arranged below a discharge end of the conveyer belt, a transport component is arranged below a discharge hole of the material distributing component, the material distributing component and the transport component cooperate to transport materials to different positions, the feed hopper is positioned in the middle of the conveyer belt, a second radiation detector can be arranged at an upstream position to carry out background measurement, environmental interference is eliminated, the radiation detection reliability is improved, a mechanism for flattening the materials is further arranged between the feed hopper and the first radiation detector, so that the material to be detected can be prevented from being stacked and ensured to be smooth, and the thickness of the material to be detected can be ensured to be uniform; in the method for detecting and sorting the radioactive pollutants on line, the accurate demarcation of the polluted materials and the uncontaminated materials can be ensured by controlling the beat of the motor and combining the synergistic effect of the material distribution assembly and the transfer assembly, so that the fixed-distance operation of the conveyer belt and the material batch sorting are realized, the measurement of the radioactive pollutants on line detection and sorting is reliable, the sorting is accurate, and the method has great popularization value and wide application prospect.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a schematic view of the overall device structure of the present invention;
FIG. 2 is a left side view of one embodiment of the dispensing and transfer assembly of the present invention;
FIG. 3 is a left side view of another embodiment of the dispensing and transfer assembly of the present invention;
Fig. 4 is a control flow chart of the present invention.
In the drawings, the reference numerals and corresponding part names:
1-motor, 2-conveyer belt, 3-feeder hopper, 4-first radiation detector, 41-first collimation mechanism, 5-feed subassembly, 51-slewing mechanism, 52-first feed hopper, 53-second feed hopper, 54-first baffle, 55-second baffle, 56-first reciprocating mechanism, 57-second reciprocating mechanism, 6-transport subassembly, 61-first conveyer belt, 62-second conveyer belt, 7-flitch, 71-third reciprocating mechanism, 8-second radiation detector, 81-second collimation mechanism, 9-material.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
The utility model provides a radioactive pollutant on-line measuring sorting system, include by motor 1 driven conveyer belt 2, the top of the position of leaning on in conveyer belt 2 length direction is equipped with feeder hopper 3, the top that the downstream position of feeder hopper 3 was kept away from to conveyer belt 2 is equipped with first radiation detector 4, the detection face of first radiation detector 4 is parallel with conveyer belt 2, the below of conveyer belt 2 discharge end is equipped with feed divider 5, the below of feed divider 5 discharge gate is equipped with transports subassembly 6, feed divider 5 and transport subassembly 6 synergism can divide material 9 to different positions. It can be understood that the feeding hopper 3 is located in the middle of the conveying belt 2 and at the upstream position, background measurement can be performed, interference is eliminated, radiation detection reliability is improved, the radiation detector and the conveying belt 2 are parallel, the influence of adjacent material 9 blocks on measurement of a block to be detected is minimized, the measurement of on-line detection and sorting of radioactive pollutants can be realized, the sorting is accurate, the first transfer belt 61 and the second transfer belt 62 with different discharging positions are arranged in the actual implementation process, namely, whether the materials reach standards or not is only distinguished, the radiation gradient can be also set, three or more transfer belts are set, the classification treatment of the material 9 is realized, the treatment difficulty is further reduced, and the treatment efficiency is improved.
Further, the transfer assembly 6 includes a first transfer belt 61 and a second transfer belt 62 having different discharge positions. Further, the material distributing assembly 5 includes a single-row-port distributing hopper, the feeding port of the single-row-port distributing hopper is located below the discharging end of the conveying belt 2, a rotating mechanism 51 is arranged on the side surface of the single-row-port distributing hopper, and the rotating mechanism 51 can drive the discharging port of the single-row-port distributing hopper to swing to the upper portion of the receiving end of the first transferring belt 61 or the second transferring belt 62. As shown in fig. 2, it can be understood that the rotating mechanism 51 drives the discharge opening to swing, and the discharge opening is directed to the first transfer belt 61 or the second transfer belt 62 according to the determination result of the first radiation detector 4, so as to realize the diversion of the overstocked high-risk material 9 and the material 9 meeting the standard.
Further, the transfer assembly 6 includes a first transfer belt 61 and a second transfer belt 62 having different discharge positions. Still further, the material distributing assembly 5 comprises a double-discharge type material distributing hopper, a material inlet of the double-discharge type material distributing hopper is located below the tail end of the conveying belt 2, two material outlets of the double-discharge type material distributing hopper face to the upper sides of material receiving ends of the first transferring belt 61 and the second transferring belt 62 respectively, a first baffle 54 capable of being controlled to open and close is arranged at a material outlet of the first transferring belt 61, and a second baffle 55 capable of being controlled to open and close is arranged at a material outlet of the second transferring belt 62. Further, the first shutter 54 is driven by a first reciprocating mechanism 56, and the second shutter 55 is driven by a second reciprocating mechanism 57. As shown in fig. 3, it can be understood that the two reciprocating driving mechanisms respectively drive the corresponding baffles for opening and closing the corresponding discharge ports, so that the action is small, the whole distributing hopper does not need to swing in a large range, and the service life can be prolonged to avoid noise.
Further, the detection boundary of the first radiation detector 4 far from the feeding hopper 3 coincides with the discharge start line of the discharge end of the conveying belt 2. It can be understood that the detection boundary of the first radiation detector 4 far away from the feed hopper 3 coincides with the discharge start line of the discharge end of the conveying belt 2, which is favorable for accurately distinguishing two adjacent material 9 block boundaries to the maximum extent, and meanwhile, accurate sorting of the current material 9 block to be measured and accurate in-place conveying of the next material 9 block to be measured are realized, and the current material 9 block to be measured adopts a static measurement mode, so that compared with a movable measurement mode, the detection truth value can be maximally approached.
Further, a second radiation detector 8 is arranged above the upstream position of the conveyor belt 2 away from the feed hopper 3, the detection surface of the second radiation detector 8 is parallel to the conveyor belt 2, and the detection area of the second radiation detector 8 is equal to the detection area of the first radiation detector 4. It can be understood that the second radiation detector 8 is used as a detection mechanism of a background measurement area, and can exclude the influence of a working environment, map a background measurement area, and normalize the measured values of two detectors through calibration, so that the two detectors can be subtracted in the same dimension during measurement to obtain a lower and more accurate background count value, so that the lower detection limit of the equipment is more optimal, that is, as shown in fig. 1, an S1 blanking area, an S2 material 9 measurement area, an S3 background measurement area, and a background measurement area are formed, the physical parameters, the installation environment and the material 9 measurement area are basically consistent, and after the count value of the background measurement area is normalized with that of the material 9 measurement area, the influence of the conveyor belt 2, the surrounding environment and the like on the measurement truth value can be effectively reduced in a radiation measurement state, and compared with the measurement effect of a single detector, the measurement accuracy can be improved by at least 1 order of magnitude, and the open transmission measurement mode of batch materials 9 is facilitated.
Further, the two ends of the first radiation detector 4 are provided with a first alignment mechanism 41, and the alignment direction of the first alignment mechanism 41 is perpendicular to the detection surface of the first radiation detector 4; the two ends of the second radiation detector 8 are provided with a second collimating mechanism 81, and the adjusting direction of the second collimating mechanism 81 is perpendicular to the detection surface of the second radiation detector 8. It can be understood that the two ends of the detector are provided with the collimation mechanisms, the angles of the collimation mechanisms are perpendicular to the detection surface of the detector, the collimation mechanisms are made of lead plates and other penetration-resistant materials, the detector can be prevented from receiving radiation of materials outside the range of the collimation mechanisms at the two ends, namely, the detector only receives radiation of 9 blocks of the materials to be detected within the projection area of the collimation mechanisms, the size of the 9 blocks of the materials to be detected is the vertical shadow area of the detector on the conveyor belt 2, the length of the detector in the conveying direction is the length L of the detector, and the structure ensures that the measurement influence of the 9 blocks of the adjacent materials to be detected is minimum.
Further, a spreading plate 7 capable of limiting the height of the material 9 is arranged between the feeding hopper 3 and the first radiation detector 4 and near the feeding hopper 3. It can be understood that the height-limiting operation of mass uniform granular pollutants on the conveying mechanism can be quickly and efficiently realized by arranging the material-limiting plate 7 capable of limiting the height of the materials 9, so that the material 9 can be paved, the material-limiting plate can be detachably connected with the frame, a plurality of common heights such as a plurality of gears such as 2cm, 5cm and 7cm are set, the reasonable selection is realized according to the particle size and the like of the materials 9, and the efficiency calibration can be considered, so that the whole measurement process is consistent with the initial calibration condition, and the measurement reliability, the authenticity and accuracy are ensured; of course, the third reciprocating mechanism 71 may also be provided, and the distance between the bed 7 and the conveyor belt 2 is further achieved by controlling the protruding length.
The invention also provides an online detection and separation method for the radioactive pollutants, which utilizes the online detection and separation system for the radioactive pollutants, and comprises the following steps:
A. Starting a motor 1 to enable a conveyor belt 2 to run, and starting a first irradiation detector;
B. the material 9 to be detected and sorted falls on the conveyer belt 2 through the feed hopper 3;
C. The conveyor belt 2 transports the material 9 under the first radiation detector;
D. The first radiation detector judges whether the material 9 is polluted or not, the judging time is t1, and the material distributing component 5 and the transferring component 6 determine the position to distribute the material 9 according to the judging result;
E. The conveyor belt 2 runs at a fixed distance, wherein the running distance is the length L of the detection range of the first radiation detector in the conveying direction of the conveyor belt 2;
F. the motor 1 is stopped, returned to step D and cycled.
Further, in step D, after determining the position to be used for distributing the material 9 and making a corresponding action, determining whether the action is in place (i.e. whether the discharge port swings in place in the first embodiment of the material distributing assembly 5, whether the baffle to be discharged is opened or not in the second embodiment of the material distributing assembly 5, and the other baffle is closed) at a time delay t2, where the time delay t2 is generally 0.5±0.25s, and is the maximum value of the time required for measuring the material in place for multiple times, so as to ensure that the action is in place, and multiple modes such as an in-place sensor, a travel sensor and the like can be adopted as the determination mode. In addition, the value of t1 is usually 1+/-0.75 s, which is generally determined according to the statistical fluctuation of the measured value of the detector, and the efficiency and the precision are both considered.
In step E, a link for determining whether the fixed-distance transmission is in place may be further provided, which is determined according to the transmission speed and the transmission distance L, in theory, t3 is L/V, but in order to leave a safety margin and give consideration to efficiency, t3 is generally 1.5×l/V, and as the determination method, various methods such as an encoder and a travel sensor on the motor 1 may be adopted.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be appreciated that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present invention, and do not indicate or imply that the components or mechanisms referred to must have a particular orientation, be configured and operated in a particular orientation, and thus are not to be construed as limiting the present invention.
The foregoing detailed description of the preferred embodiments has been provided for the purpose of illustrating the general principles of the invention, and is recognized as a matter of course, not necessarily the preferred embodiment for practicing the invention, but rather the following claims should be construed as covering all such modifications, equivalents, alternatives, and improvements as may fall within the spirit and principles of the invention.
Claims (5)
1. The utility model provides a radioactive pollutant on-line measuring sorting system which characterized in that, includes conveyer belt (2) by motor (1) drive, the top of the middle position of conveyer belt (2) length direction is equipped with feeder hopper (3), the top of the downstream position that conveyer belt (2) kept away from feeder hopper (3) is equipped with first radiation detector (4), the detection face of first radiation detector (4) is parallel with conveyer belt (2), the below of conveyer belt (2) discharge end is equipped with feed subassembly (5), the below of feed subassembly (5) discharge gate is equipped with transport subassembly (6), feed subassembly (5) and transport subassembly (6) synergism can be with material (9) branch transport to different positions;
The transfer assembly (6) comprises a first transfer belt (61) and a second transfer belt (62) which are different in unloading positions, the detection boundary of the first radiation detector (4) away from the feed hopper (3) is overlapped with the unloading starting line of the unloading end of the conveying belt (2), the second radiation detector (8) is arranged above the upstream position of the conveying belt (2) away from the feed hopper (3), the detection surface of the second radiation detector (8) is parallel to the conveying belt (2), the detection area of the second radiation detector (8) is equal to the detection area of the first radiation detector (4), the two ends of the first radiation detector (4) are provided with first alignment mechanisms (41), and the alignment direction of the first alignment mechanisms (41) is perpendicular to the detection surface of the first radiation detector (4); the two ends of the second radiation detector (8) are provided with second collimation mechanisms (81), the adjustment direction of the second collimation mechanisms (81) is perpendicular to the detection surface of the second radiation detector (8), and a spreading plate (7) capable of limiting the height of the material (9) is arranged between the feeding hopper (3) and the first radiation detector (4) and close to the feeding hopper (3).
2. The on-line detection and separation system for radioactive pollutants according to claim 1, wherein the material distribution assembly (5) comprises a single-row-port type material distribution hopper, a feed inlet of the single-row-port type material distribution hopper is positioned below a discharge end of the conveying belt (2), a rotating mechanism (51) is arranged on the side surface of the single-row-port type material distribution hopper, and the rotating mechanism (51) can drive a discharge outlet of the single-row-port type material distribution hopper to swing to the position above a receiving end of the first transfer belt (61) or the second transfer belt (62).
3. An on-line detection and separation system for radioactive pollutants according to claim 1, wherein the material distribution assembly (5) comprises a double-discharge type material distribution hopper, a material inlet of the double-discharge type material distribution hopper is positioned below the tail end of the conveying belt (2), two material outlets of the double-discharge type material distribution hopper face to the upper parts of material receiving ends of a first conveying belt (61) and a second conveying belt (62) respectively, a first baffle (54) capable of being controlled to open and close is arranged at the position facing to the material outlet of the first conveying belt (61), and a second baffle (55) capable of being controlled to open and close is arranged at the position facing to the material outlet of the second conveying belt (62).
4. A radioactive contaminant online detection and sorting system according to claim 3, characterized in that the first shutter (54) is driven by a first reciprocating mechanism (56) and the second shutter (55) is driven by a second reciprocating mechanism (57).
5. An on-line detection and separation method for radioactive pollutants, which is characterized by using the on-line detection and separation system for radioactive pollutants according to any one of claims 1 to 4, comprising the following steps:
A. Starting the motor (1) to enable the conveyor belt (2) to run, and starting the first radiation detector;
B. the material (9) to be detected and sorted falls on the conveying belt (2) through the feeding hopper (3);
C. the conveying belt (2) conveys the material (9) to the position below the first irradiation detector;
D. the first irradiation detector judges whether the material (9) is polluted or not, the judging time is t1, and the material distributing component (5) and the transferring component (6) determine the position to distribute the material (9) according to the judging result;
E. the conveyor belt (2) runs at fixed distance, wherein the running distance is the length L of the detection range of the first radiation detector in the conveying direction of the conveyor belt (2);
F. the motor (1) stops, returns to the step D and circulates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010994852.2A CN112007877B (en) | 2020-09-21 | 2020-09-21 | On-line detection and separation system and method for radioactive pollutants |
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| CN202010994852.2A CN112007877B (en) | 2020-09-21 | 2020-09-21 | On-line detection and separation system and method for radioactive pollutants |
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| CN112007877A CN112007877A (en) | 2020-12-01 |
| CN112007877B true CN112007877B (en) | 2024-04-30 |
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