CN112489845B - Laser decontamination and recovery device for plate type heat exchange plates of PTR (Positive temperature coefficient) system of nuclear power station - Google Patents
Laser decontamination and recovery device for plate type heat exchange plates of PTR (Positive temperature coefficient) system of nuclear power station Download PDFInfo
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- CN112489845B CN112489845B CN202010978162.8A CN202010978162A CN112489845B CN 112489845 B CN112489845 B CN 112489845B CN 202010978162 A CN202010978162 A CN 202010978162A CN 112489845 B CN112489845 B CN 112489845B
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- 238000005202 decontamination Methods 0.000 title claims abstract description 103
- 230000003588 decontaminative effect Effects 0.000 title claims abstract description 100
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 239000000428 dust Substances 0.000 claims abstract description 29
- 230000007306 turnover Effects 0.000 claims abstract description 26
- 238000004140 cleaning Methods 0.000 claims abstract description 21
- 238000001179 sorption measurement Methods 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 230000009471 action Effects 0.000 claims description 18
- 238000005096 rolling process Methods 0.000 claims description 17
- 210000001503 joint Anatomy 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000000941 radioactive substance Substances 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 10
- 238000012864 cross contamination Methods 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 description 6
- 230000008021 deposition Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000002285 radioactive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011824 nuclear material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
- G21F9/005—Decontamination of the surface of objects by ablation
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a laser decontamination and recovery device for a plate heat exchange plate of a PTR system of a nuclear power station, which comprises a conveyor belt, an adsorption device, a decontamination operation room and a turnover device, wherein the adsorption device is arranged on the conveyor belt; the adsorption device is used for carrying out feeding and discharging work on the conveyor belt; the decontamination operation room is internally provided with a decontamination operation table and a freely movable executing mechanism arranged near the decontamination operation table, and the executing mechanism comprises a dust hood, a laser cleaning gun, an alpha/beta surface pollution detector and a dust collector; the turnover device is used for turning the upper and lower surfaces of the heat exchange plates received from the conveyor belt and then transmitting the heat exchange plates to the conveyor belt; according to the laser decontamination and recovery device, radioactive substance detection can be carried out on the material to be treated under the condition that the material to be treated is not moved every time the laser decontamination operation is carried out, until the radioactive substance on the material to be treated is confirmed to be removed completely, and cross contamination to workers is avoided; through the arrangement of the turnover device, the whole decontamination treatment process does not need to be manually participated.
Description
Technical Field
The invention relates to the technical field of nuclear material purification, in particular to a laser decontamination and recovery device for a plate type heat exchange plate of a PTR system of a nuclear power station.
Background
China is one of the countries with the largest construction regulations of nuclear facilities in the world, and the countries greatly promote strategic adjustment of energy structures at the present stage, and nuclear energy is mainly developed as clean energy. However, with the rapid development of nuclear energy, the resulting problem of radionuclide accumulation on the surface of nuclear facilities is in need of a solution. At present, decontamination processes for nuclear facilities generally have the following problems: 1. the secondary waste amount generated by adopting the traditional decontamination modes such as sand blasting, chemistry, manual grinding, high-pressure water flushing and the like is relatively large, and the pollutant deposition phenomenon can be generated on nuclear facilities, so that the decontamination effect is not ideal; 2. in the operation process, workers are required to contact the material to be treated for many times, so that the irradiation risk of the related workers is relatively high; 3. the processed nuclear facilities need to be transported to a detection workshop outside a decontamination workshop for secondary detection, and if the nuclear facilities do not reach the standard, secondary decontamination cleaning is performed, so that the workload of workers can be increased, radionuclides on the nuclear facilities are easy to remain on conveying equipment which is considered to be clean, and cross contamination is caused to workers.
In summary, the specific radionuclide deposition phenomena and complex radionuclide deposition types on the surface of nuclear facilities place more special demands on related removal processes and equipment, and it has been difficult for conventional radionuclide removal processes and equipment to meet the increasing radionuclide removal demands.
Disclosure of Invention
The invention aims to provide a laser decontamination and recovery device for a PTR system plate heat exchange plate of a nuclear power station, which is used for preventing the spread and diffusion of radioactive substances on the surface of a nuclear material to the greatest extent, greatly reducing the risk of cross contamination of on-site workers and improving the working efficiency.
In order to achieve the above purpose, the invention discloses a laser decontamination and recovery device for plate heat exchanger plates of a PTR system of a nuclear power station, which is used for decontaminating the plate heat exchanger plates in the PTR system of the nuclear power station and comprises a conveyor belt, an adsorption device, a decontamination operation room and a turnover device;
the device comprises a decontamination operation room, a turnover device, a conveying belt, a heat exchange plate and a heat exchange plate, wherein one end of the conveying belt is in butt joint with the decontamination operation room, the other end of the conveying belt is in butt joint with the turnover device, the conveying belt comprises a dirty surface section and a clean surface section, the dirty surface section is only used for being in contact with the dirty surface of the heat exchange plate, and the clean surface section is only used for being in contact with the clean surface of the heat exchange plate;
the adsorption device is used for carrying out feeding and discharging operations on the conveyor belt and comprises an action driving mechanism and a double-sided sucker arranged on the action driving mechanism, and the action driving mechanism can drive the double-sided sucker to perform overturning and displacement actions;
the decontamination operation room is used for providing a closed place for decontaminating the heat exchange plates, a decontamination operation table and a freely movable executing mechanism which is arranged near the decontamination operation table are arranged in the decontamination operation room, and the executing mechanism comprises a dust hood, a laser cleaning gun, an alpha/beta surface pollution detector and a dust collector which are arranged in the dust hood;
and the turnover device is used for conveying the heat exchange plates received from the conveyor belt to the conveyor belt after the upper and lower surfaces of the heat exchange plates turn over.
Compared with the prior art, the laser decontamination and recovery device has the advantages that firstly, as the laser decontamination basically adopts a dry decontamination process, the arrangement of the laser cleaning gun generates little secondary waste in the treatment process of the heat exchange plate, the pollutant deposition phenomenon can not be generated, and the decontamination effect is better; secondly, an alpha/beta surface pollution detector is arranged in a dust hood in the decontamination operation room, so that whether radioactive substances exist on the surface of the material to be treated or not can be detected under the condition that the material to be treated is not moved every time the laser decontamination operation is carried out until the radioactive substances on the material to be treated are confirmed to be removed completely, thereby enabling the clean material in the decontamination operation room to be conveyed to be clean absolutely and avoiding cross contamination to workers; furthermore, through the arrangement of the turnover device, after one surface of the heat exchange plate is completely treated, the heat exchange plate can be automatically turned over by the turnover device and then transmitted to a decontamination operation room, and decontamination treatment is carried out on the other surface of the heat exchange plate, so that the whole decontamination treatment process does not need manual participation, and the degree of automation is higher; in addition, the laser cleaning gun and the dust collector are integrated together, so that the generated radioactive nuclear waste can be timely collected, and the radioactive nuclear waste is prevented from being spread to other equipment in the decontamination operation room.
Preferably, the turnover device comprises a bracket, a rolling ring and a trough; the two rolling rings are respectively arranged at the front end and the rear end of the support and can do circular motion in a vertical plane on the support, the front end and the rear end of the trough are respectively connected with the two rolling rings, the trough is internally provided with an upper conveying roller and a lower conveying roller which are oppositely arranged, and one end of the trough, which is close to the conveying belt, is provided with an opening part which is in butt joint with the conveying belt.
Preferably, a clamping mechanism is arranged on one side of the top surface or the bottom surface of the trough, and the clamping mechanism is used for propping the heat exchange plates against one group of the first conveying rollers.
Preferably, a pair of left and right opposite driving wheels are respectively arranged at the front end and the rear end of the bracket, the rolling ring is clamped between the pair of driving wheels, and the rolling ring can rotate along the two driving wheels; the support is also provided with a power device in transmission connection with the driving wheel, and the power device is used for driving the driving wheel to rotate.
Preferably, a roller frame, a plurality of second conveying rollers and a plurality of third conveying rollers are arranged on the decontamination operation table, the second conveying rollers are fixedly installed on the roller frame, each third conveying roller is arranged at intervals with each second conveying roller, the third conveying rollers are installed on the roller frame through a lifting mechanism, the third conveying rollers can be stabilized on a plane above or below the second conveying rollers through the lifting mechanism, so that the second conveying rollers and the third conveying rollers can respectively and independently support and convey the heat exchange sheet, one of the second conveying rollers and the third conveying rollers is only used for supporting and conveying the dirty surface of the heat exchange sheet, and the other of the second conveying rollers and the third conveying rollers is only used for supporting and conveying the clean surface of the heat exchange sheet.
Preferably, the lifting mechanism comprises a lifting rail arranged on the roller frame, a connecting plate connected with the lifting rail in a sliding manner and a driving device, wherein the connecting plate is respectively connected with each third conveying roller, and the driving device is used for driving the connecting plate to slide along the lifting rail.
Preferably, a dust filtering purifier is further arranged in the decontamination operation room.
Preferably, the dust filtering purifier comprises an air inlet, an air outlet, a dust collecting net positioned between the air inlet and the air outlet, primary filter cotton, middle-effect filter cotton and four layers of activated carbon filters.
Preferably, a central control console is arranged outside the decontamination operation room, a monitor is arranged in the decontamination operation room, and the central control console is in communication connection with the monitor and the executing mechanism.
Preferably, a surface appearance detector in communication connection with the central control console is further arranged above the conveyor belt, and the surface appearance detector is used for detecting the outline of the upper surface of the current heat exchange plate on the conveyor belt so as to provide a working path for the laser cleaning gun.
Drawings
FIG. 1 is a schematic diagram of a planar system of a laser decontamination and recovery device according to an embodiment of the present invention.
Fig. 2 is a schematic plan view of a conveyor belt according to an embodiment of the present invention.
Fig. 3 is a schematic perspective view of an adsorption apparatus according to an embodiment of the invention.
Fig. 4 is a schematic perspective view of a turnover device according to an embodiment of the invention.
Fig. 5 is a schematic plan view of a roller supporting and conveying mechanism mounted on a decontamination console according to an embodiment of the present invention, wherein a third conveying roller is in a falling state.
Fig. 6 is a schematic view showing another plane structure of the roller supporting and conveying mechanism mounted on the decontamination operation table in the embodiment of the present invention, wherein the third conveying roller is in a raised state.
Fig. 7 is a schematic diagram showing an internal structure of a dust filter cleaner according to an embodiment of the present invention.
Detailed Description
In order to describe the technical content, the constructional features, the achieved objects and effects of the present invention in detail, the following description is made in connection with the embodiments and the accompanying drawings.
As shown in fig. 1 to 3, the invention discloses a laser decontamination and recovery device for plate heat exchanger plates of a PTR system of a nuclear power station, which is used for decontaminating the plate heat exchanger plates in the PTR system of the nuclear power station and comprises a conveyor belt 1, an adsorption device, a decontamination operation room 3 and a turnover device 4. One end of the conveyor belt 1 is in butt joint with the decontamination operation room 3, the other end of the conveyor belt 1 is in butt joint with the turnover device 4, and is used for conveying heat exchange plates to be treated into the decontamination operation room 3, and conveying the heat exchange plates which are output from the decontamination operation room 3 and need to be turned over into the turnover device 4, the conveyor belt 1 comprises a dirty surface section 11 and a clean surface section 10, the dirty surface section 11 is only used for being in contact with the dirty surface of the heat exchange plates, and the clean surface section 10 is only used for being in contact with the clean surface of the heat exchange plates, so that radioactive substances can be prevented from being transferred to the surface of the heat exchange plates which is treated cleanly through the conveyor belt 1 again. The adsorption device is used for carrying out feeding and discharging work on the conveyor belt 1, and comprises an action driving mechanism 20 and a double-sided sucker 21 arranged on the action driving mechanism 20, wherein the action driving mechanism 20 can drive the double-sided sucker 21 to perform overturning and displacement actions, the action driving mechanism 20 in the embodiment is preferably a mechanical arm with six degrees of freedom, the double-sided sucker 21 is connected with the mechanical arm through a rotating shaft, and the mechanical arm can drive the rotating shaft to rotate. In this embodiment, one surface of the double-sided suction cup 21 is only used for adsorbing the dirty surface of the heat exchange plate, and the other surface of the double-sided suction cup 21 is only used for adsorbing the clean surface of the heat exchange plate. The decontamination operation room 3 is used for providing a closed place for decontaminating the heat exchange plates, a decontamination operation table 30 and a freely movable actuating mechanism which is arranged near the decontamination operation table 30 are arranged in the decontamination operation room 3, and the actuating mechanism comprises a dust hood 31, a laser cleaning gun 32, an alpha/beta surface pollution detector 33 and a dust collector 34 which are arranged in the dust hood 31. To facilitate free movement of the actuator, the actuator may be mounted at the end of another six degree of freedom mechanical arm 37. The turnover device 4 is used for turning the upper and lower surfaces of the heat exchanger plates received from the conveyor belt 1 and then transmitting the heat exchanger plates to the conveyor belt 1.
The working process of the laser decontamination and recovery device with the structure is as follows: firstly, the action driving mechanism 20 works, the double-sided suction disc 21 is moved to the position where the heat exchange plate to be treated is located, then the dirty surface of the double-sided suction disc 21 is opposite to the heat exchange plate through the overturning action, so that the heat exchange plate is adsorbed onto the dirty surface section 11 of the conveyor belt 1, then the heat exchange plate is conveyed to the decontamination operation room 3 through the conveyor belt 1, at the moment, the dirty surface section 11 of the conveyor belt 1 is completely located below the lower belt surface, the clean surface section 10 of the conveyor belt 1 is located above and becomes an upper belt surface, and the conveyor belt 1 is inverted because the lower surface of the heat exchange plate is still the dirty surface when the heat exchange plate is output from the decontamination operation room 3 for the first time, so that the dirty surface section 11 of the conveyor belt 1 is located above again and becomes the upper belt surface to be ready for receiving the heat exchange plate with the cleaned upper surface output from the decontamination operation room 3; in the decontamination operation room 3, the executing mechanism moves to the position of the heat exchange plate, so that the dust hood 31 covers all or the part to be treated currently, the dust collector 34 is started, the alpha/beta surface pollution detector 33 is started to detect whether radioactive substances exist on the surface of the heat exchange plate, if the radioactive substances exist on the current heat exchange plate, the laser cleaning gun 32 is started to execute the cleaning work on the current upper surface of the heat exchange plate, after one cleaning pass, the alpha/beta surface pollution detector 33 is started again to detect whether the radioactive substances exist on the current upper surface of the heat exchange plate, and if the radioactive substances still exist, the laser cleaning gun 32 is started to clean again until the detection value of the current upper surface of the heat exchange plate reaches the standard, and the cleaning is indicated; when the area of the heat exchange plate is relatively large, the heat exchange plate can be partitioned by adopting the mode until the whole surface of the heat exchange plate is treated; then, the heat exchange plate is conveyed onto the conveyor belt 1, the heat exchange plate is conveyed to the turnover device 4 through the conveyor belt 1, the upper surface and the lower surface of the heat exchange plate are turned over through the turnover device 4 and then conveyed onto the conveyor belt 1 again, at the moment, the lower surface of the heat exchange plate is a clean surface and is contacted with the clean surface section 10 of the conveyor belt 1, and then the heat exchange plate is conveyed to the decontamination operation room 3 through the conveyor belt 1 to perform decontamination operation, at the moment, since the lower surface of the heat exchange plate is already treated cleanly, after the heat exchange plate is conveyed into the decontamination operation room 3, the conveyor belt 1 is still required to be turned over, so that the clean surface section 10 is restored to the upper surface positioned above and ready to receive the heat exchange plate which is completely treated cleanly and comes out of the decontamination operation room 3; when the heat exchanger plates are again placed on the conveyor belt 1 from the decontamination operation room 3, the conveyor belt 1 moves them into the movable range of the action driving mechanism 20, and then the action driving mechanism 20 performs the blanking work of the heat exchanger plates which have been cleaned by moving and turning the double-sided suction plate 21.
Through the working process of the laser decontamination and recovery device, firstly, as the laser decontamination basically adopts a dry decontamination process, the arrangement of the laser cleaning gun 32 produces little secondary waste in the treatment process of the heat exchange plate, and no pollutant deposition phenomenon is produced, so that the decontamination effect is better; secondly, an alpha/beta surface pollution detector 33 is arranged in a dust hood 31 in the decontamination operation room 3, so that whether radioactive substances exist on the surface of the material to be treated or not can be detected under the condition that the material to be treated is not moved every time of laser decontamination operation, until the radioactive substances on the material to be treated are confirmed to be removed completely, thereby the clean material conveyed out of the decontamination operation room 3 is absolutely clean, and cross contamination to workers is avoided; furthermore, through the arrangement of the turnover device 4, after one surface of the heat exchange plate is completely treated, the heat exchange plate can be automatically turned over by the turnover device 4 and then transmitted to the decontamination operation room 3, and decontamination treatment is carried out on the other surface of the heat exchange plate, so that the whole decontamination treatment process does not need to be manually participated, and the degree of automation is higher; in addition, the laser cleaning gun 32 and the dust collector 34 are integrated together, so that the generated radioactive nuclear waste can be timely collected, and is prevented from being spread to other equipment in the decontamination operation room 3.
For the turning device 4, as shown in fig. 4, it includes a bracket 40, a rolling ring 41 and a trough 42; the two rolling rings 41 are respectively arranged at the front end and the rear end of the bracket 40, and can do circular motion on the bracket 40 in a vertical plane, the front end and the rear end of the trough 42 are respectively connected with the two rolling rings 41, the trough 42 is internally provided with an upper conveying roller 43 and a lower conveying roller 43 which are oppositely arranged, and one end of the trough 42, which is close to the conveyor belt 1, is provided with an opening 44 which is in butt joint with the conveyor belt 1. In this embodiment, since the opening 44 of the trough 42 is in butt joint with the conveyor belt 1, the conveyor belt 1 can directly convey the heat exchanger plate into the trough 42 and is clamped between the upper and lower sets of first conveying rollers 43, the upper and lower sets of first conveying rollers 43 not only perform clamping of the heat exchanger plate but also perform conveying of the heat exchanger plate, and in addition, one set of the upper and lower sets of first conveying rollers 43 is only in contact with the dirty surface of the heat exchanger plate, and the other set of the upper and lower sets of first conveying rollers 43 is only in contact with the clean surface of the heat exchanger plate, so as to avoid cross secondary pollution of radioactive substances on the surface of the heat exchanger plate. When the heat exchange plates enter the trough 42, the two rolling rings 41 rotate for one circle, so that the trough 42 is driven to rotate for one circle, and the upper surface and the lower surface of the heat exchange plates in the trough 42 are exchanged. Preferably, in order to avoid shaking the heat exchanger when the trough 42 is overturned, a clamping mechanism 45 is disposed on one side of the top or bottom surface of the trough 42, the clamping mechanism 45 is used for propping the heat exchanger against one of the first conveying rollers 43, and the clamping mechanism 45 in this embodiment is a plurality of cylinders disposed on the trough 42 at intervals, and when the trough 42 is overturned, the cylinders extend to prop against the heat exchanger, so as to prop against the heat exchanger against one of the first conveying rollers 43. Further, a pair of left and right opposite driving wheels 46 are respectively provided at the front and rear ends of the bracket 40, the rolling ring 41 is caught between the pair of driving wheels 46, and the rolling ring 41 is rotatable along the two driving wheels 46. Preferably, the support 40 is further provided with a power device 47 in transmission connection with the driving wheel 46, and the power device 47 is used for driving the driving wheel 46 to rotate, and the rotation of the driving wheel 46 controls the movement of the two rolling rings 41.
Further, as shown in fig. 5 and 6, a roller supporting and conveying mechanism is provided on the decontamination operation table 30, the roller supporting and conveying mechanism includes a roller frame 301 and a plurality of second conveying rollers 302 and a plurality of third conveying rollers 303 provided on the roller frame 301, the plurality of second conveying rollers 302 are fixedly installed on the roller frame 301, each third conveying roller 303 is spaced apart from each second conveying roller 302, and the plurality of third conveying rollers 303 are installed on the roller frame 301 by a lifting mechanism, and the plurality of third conveying rollers 303 can be stabilized on a plane above or below the plurality of second conveying rollers 302 by the lifting mechanism, so that the plurality of second conveying rollers 302 and the plurality of third conveying rollers 303 can independently support and convey the heat exchange sheet, respectively, and one of the plurality of second conveying rollers 302 and the plurality of third conveying rollers 303 is only used for supporting the dirty surface of the heat exchange sheet, and the other of the plurality of second conveying rollers 302 and the plurality of third conveying rollers 303 is only used for supporting the clean surface of the heat exchange sheet. In this embodiment, two sets of rollers are mounted on the roller frame 301, one set (second conveying roller 302) is fixedly mounted, the other set (third conveying roller 303) is movably mounted in a liftable manner, when the lower surface of the heat exchanger plate fed onto the decontamination console 30 is a dirty surface, the third conveying roller 303 descends below the supporting surface of the second conveying roller 302, the supporting and conveying work of the heat exchanger plate is performed by the second conveying roller 302, when the lower surface of the heat exchanger plate fed onto the decontamination console 30 is a clean surface, the third conveying roller 303 ascends above the supporting surface of the second conveying roller 302, and the supporting and conveying work of the heat exchanger plate is performed by the third conveying roller 303, thereby avoiding cross contamination of radioactive substances. Preferably, the lifting mechanism comprises a lifting rail 304 arranged on the roller frame 301, a connecting plate 305 slidingly connected with the lifting rail 304, and a driving device 306, wherein the connecting plate 305 is respectively connected with each third conveying roller 303, and the driving device 306 is used for driving the connecting plate 305 to slide along the lifting rail 304. The driving device 306 in this embodiment may be a gear mechanism driven by a motor, a pneumatic cylinder mechanism driven by air pressure, or a hydraulic cylinder mechanism driven by hydraulic pressure, which is not limited to the specific structural form of the driving device 306.
Further, referring to fig. 1 and 7 again, in order to prevent the dust with radioactive materials from escaping from the dust hood 31 and diffusing to other devices, a dust filter cleaner 35 may be disposed in the decontamination chamber 3 to perform a deep filtering cleaning operation on the air environment in the decontamination chamber 3. Preferably, the dust filter cleaner 35 includes an air inlet 350, an air outlet 351, and a dust collection net 352, a primary filter cotton 353, a secondary filter cotton 354, and a four-layer activated carbon filter 355 between the air inlet 350 and the air outlet 351.
Further, a central control console 5 can be arranged outside the decontamination operation room 3, a monitor 36 is arranged in the decontamination operation room 3, and the central control console 5 is in communication connection with the monitor 36 and the executing mechanism. The actions of the actuators, such as the moving actuator, the open/Guan Xichen device 34, the laser cleaning gun 32, and the alpha/beta surface contamination detector 33, can be clearly controlled by the center console 5 and the monitor 36, thereby preventing the operator from entering the decontamination operation room 3. Preferably, the laser cleaning gun 32 is connected with a pulse laser generator 6 arranged outside the decontamination operation room 3 through an optical fiber, and the laser generator 6 is in communication connection with the central control operation table 5, so that the working parameters of the laser cleaning gun 32 can be controlled through the central control operation table 5. Because the area of the heat exchange plate is relatively large, further, a surface appearance detector 7 in communication connection with the center console is further arranged above the conveyor belt 1, and the surface appearance detector 7 is used for detecting the outline of the upper surface of the current heat exchange plate on the conveyor belt 1 so as to provide a working path for the laser cleaning gun 32.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the claims, which follow, as defined in the claims.
Claims (10)
1. The laser decontamination and recovery device for the plate heat exchanger plates of the PTR system of the nuclear power station is used for decontaminating the plate heat exchanger plates in the PTR system of the nuclear power station and is characterized by comprising a conveyor belt, an adsorption device, a decontamination operation room and a turnover device;
the device comprises a decontamination operation room, a turnover device, a conveying belt, a heat exchange plate and a heat exchange plate, wherein one end of the conveying belt is in butt joint with the decontamination operation room, the other end of the conveying belt is in butt joint with the turnover device, the conveying belt comprises a dirty surface section and a clean surface section, the dirty surface section is only used for being in contact with the dirty surface of the heat exchange plate, and the clean surface section is only used for being in contact with the clean surface of the heat exchange plate;
the adsorption device is used for carrying out feeding and discharging operations on the conveyor belt and comprises an action driving mechanism and a double-sided sucker arranged on the action driving mechanism, and the action driving mechanism can drive the double-sided sucker to perform overturning and displacement actions;
the decontamination operation room is used for providing a closed place for decontaminating the heat exchange plates, a decontamination operation table and a freely movable executing mechanism which is arranged near the decontamination operation table are arranged in the decontamination operation room, and the executing mechanism comprises a dust hood, a laser cleaning gun, an alpha/beta surface pollution detector and a dust collector which are arranged in the dust hood;
and the turnover device is used for conveying the heat exchange plates received from the conveyor belt to the conveyor belt after the upper and lower surfaces of the heat exchange plates turn over.
2. The laser decontamination and recovery device for a nuclear power plant PTR system plate heat exchanger fin of claim 1, wherein the turnover device comprises a bracket, a rolling ring and a trough; the two rolling rings are respectively arranged at the front end and the rear end of the support and can do circular motion in a vertical plane on the support, the front end and the rear end of the trough are respectively connected with the two rolling rings, the trough is internally provided with an upper conveying roller and a lower conveying roller which are oppositely arranged, and one end of the trough, which is close to the conveying belt, is provided with an opening part which is in butt joint with the conveying belt.
3. The laser decontamination and recovery device for a plate heat exchanger fin of a PTR system of a nuclear power plant according to claim 2, wherein a clamping mechanism is provided on one side of the top or bottom surface of the trough, and the clamping mechanism is used for abutting the heat exchanger fin against one of the first conveying rollers.
4. The laser decontamination and recovery device for a plate heat exchanger fin of a PTR system of a nuclear power station according to claim 2, wherein a pair of left and right opposite driving wheels are respectively arranged at the front and rear ends of the bracket, the rolling ring is clamped between the pair of driving wheels, and the rolling ring can rotate along the two driving wheels; the support is also provided with a power device in transmission connection with the driving wheel, and the power device is used for driving the driving wheel to rotate.
5. A laser decontamination and recovery device for a nuclear power plant PTR system plate heat exchanger fin as claimed in claim 1, wherein a roller frame and a plurality of second and third conveying rollers are provided on the decontamination operation table, the plurality of second conveying rollers are fixedly installed on the roller frame, each of the third conveying rollers is alternately spaced from each of the second conveying rollers, and the plurality of third conveying rollers are installed on the roller frame by a lifting mechanism, by which the plurality of third conveying rollers can be stabilized on a plane above or below the plurality of second conveying rollers so that the plurality of second conveying rollers and the plurality of third conveying rollers can independently support and convey the heat exchanger fin, respectively, and one of the plurality of second conveying rollers and the plurality of third conveying rollers is used only for supporting and conveying a dirty surface of the heat exchanger fin and the other of the plurality of second conveying rollers and the plurality of third conveying rollers is used only for supporting and conveying a clean surface of the heat exchanger fin.
6. The laser decontamination and recovery device for a plate heat exchanger fin of a PTR system of a nuclear power plant according to claim 5, wherein the lifting mechanism comprises a lifting rail provided on the roller frame, a connection plate slidably connected to the lifting rail, and a driving device connected to each third conveying roller, and the driving device is used for driving the connection plate to slide along the lifting rail.
7. The laser decontamination and recovery device for a plate heat exchanger fin of a PTR system of a nuclear power plant according to claim 1, wherein a dust filter purifier is further provided in the decontamination operation room.
8. The laser decontamination and recovery device for a plate heat exchanger fin of a PTR system of a nuclear power plant according to claim 7, wherein the dust filter purifier comprises an air inlet, an air outlet, and a dust collecting net, a primary filter cotton, a middle filter cotton and four layers of activated carbon filters between the air inlet and the air outlet.
9. The laser decontamination and recovery device for a plate heat exchanger fin of a PTR system of a nuclear power plant according to claim 1, wherein a central control console is arranged outside the decontamination operation room, a monitor is arranged in the decontamination operation room, and the central control console is in communication connection with the monitor and the executing mechanism.
10. The laser decontamination and recovery device for plate heat exchanger fins of PTR system of nuclear power station as set forth in claim 9, wherein a surface appearance detector is further disposed above the conveyor belt and in communication with the central console, the surface appearance detector being configured to detect a contour of an upper surface of a current heat exchanger fin on the conveyor belt to provide a working path for the laser cleaning gun.
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| CN113324433A (en) * | 2021-06-28 | 2021-08-31 | 中广核研究院有限公司 | Laser decontamination device and method |
| CN115890611B (en) * | 2022-11-17 | 2024-08-20 | 广州大学 | Nuclear power station iodine filter inspection robot |
| CN118385216B (en) * | 2024-06-28 | 2024-10-18 | 珠海格力电器股份有限公司 | Heat radiation module cleaning equipment, heat radiation module cleaning control method and dehumidifier |
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