CN103808110B - A kind of radioactive waste ion exchange resin microwave bucket inner drying method and device - Google Patents
A kind of radioactive waste ion exchange resin microwave bucket inner drying method and device Download PDFInfo
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- CN103808110B CN103808110B CN201210448593.9A CN201210448593A CN103808110B CN 103808110 B CN103808110 B CN 103808110B CN 201210448593 A CN201210448593 A CN 201210448593A CN 103808110 B CN103808110 B CN 103808110B
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Abstract
The present invention relates to a kind of radioactive waste ion exchange resin microwave bucket inner drying method, including: (I) is by radioactive waste ion exchange resin dewatering; (II) radioactive waste ion exchange resin after dewatering is delivered in stainless steel cask; (III) utilize microwave that the radioactive waste ion exchange resin being contained in stainless steel cask is dried process, and temperature is monitored; (IV) reach after predetermined filling rate until stainless steel cask, stop dry, carry out sealing process up for safekeeping. Present invention also offers a kind of drying device that can realize said method. The present invention adopts microwave setting-out evaporation technique, it is ensured that dry run quickly and stably carries out, it is ensured that resin is heated evenly and invariance, and can reduce the removal that radionuclide seethes with excitement with moisture to greatest extent; Drying device can realize continuous feed and automatically control, and dry run carries out in the stainless steel cask in drying cabin, reduces radionuclide to the pollution of equipment and environment and probability that personnel are damaged.
Description
Technical field
The invention belongs to Radwastes treatment technical field, be specifically related to a kind of radioactive waste ion exchange resin microwave bucket inner drying method and drying device.
Background technology
Along with socioeconomic development, the demand for electric power resource is increasing, and nuclear power is increasingly paid attention to by people as a kind of energy efficient, cleaning. But while bringing huge economic interests, the process problem of the waste ion-exchang resin produced in nuclear power station running is also day by day serious. It has certain specific radioactivity, is suffering the natural disaster such as earthquake, tsunami if dealt with improperly, or brings serious harm very easily to during the attack of terrorism public and environment, in some instances it may even be possible to cause social unrest. Therefore, it is necessary to radioactive waste ion exchange resin to be carried out effective process.
Up to now, the radioactive waste ion exchange resin that nuclear power station produces, adopt is kept in or cement solidification method process more, but temporary method is makeshift, is not inconsistent the requirement of refuse safety; The increase-volume ratio of cement solidification method reaches 4.8��5.2, not only takies temporary library storage position but also increase final disposal expense, and do not meet waste minimization principle. At present more burning method is used for other Radwastes treatment, although have that volume reduction amount is big, process after the advantages such as refuse floor space is little, processing speed is fast, but burning process can produce substantial amounts of harmful gas, such as SOx, NOx, CO etc. Simultaneously burn produce tail gas in often carry substantial amounts of dust secretly, these dust can carry the harmful substances such as two English and heavy metal. And due to the special nature of ion exchange resin so that it is in burning process, unburned resin particle is very easily incinerated grey parcel, causes the insufficient of burning, affects treatment effect.
Bucket inner drying technique is simple with its technique, and the advantages such as volume reduction ratio is big, nuclear power station is applied abroad.And the process characteristic of dried after the refuse elder generation barrelling of bucket inner drying employing, not only can be prevented effectively from cannot sealing of traditional drying mode and cause alpha-contamination problem, also allow for collection and the post processing of desciccate.
The thermal source of conventional bucket inner drying technology has steam, electrical heating, heat conduction wet goods, conduct heat in bucket extroversion bucket, owing to Tong Biyutong center exists thermograde, bucket wall place waste ion-exchang resin quick heating, fast drying, waste ion-exchang resin degeneration easily occurs, blocks conduction of heat.
In the processing procedure of radioactive waste ion exchange resin, volume reduction treatment and reduction disposal costs must consider, but in processing procedure, issuable environmental problem and social problem also must be paid attention to. Accordingly, it would be desirable to exploitation one can effectively process radioactive waste ion exchange resin, there is higher using value, the method that can effectively avoid again environmental problem and the social problem being likely to occur.
Summary of the invention
For the defect existed in prior art, it is an object of the present invention to provide a kind of safety, quickly, can volume reduction and to environment substantially free of contamination radioactive waste ion exchange resin microwave bucket inner drying method to greatest extent.
It is a further object to provide a kind of drying device that can realize above-mentioned radioactive waste ion exchange resin microwave bucket inner drying method.
For reaching object above, the technical solution used in the present invention is: a kind of radioactive waste ion exchange resin microwave bucket inner drying method, comprises the following steps:
(I) by radioactive waste ion exchange resin dewatering;
(II) radioactive waste ion exchange resin after dewatering is delivered in stainless steel cask;
(III) utilize microwave that the radioactive waste ion exchange resin being contained in stainless steel cask is dried process, and temperature is monitored;
(IV) reach after predetermined filling rate until stainless steel cask, stop dry, carry out sealing process up for safekeeping.
Further, step (I) adopts air pressure dewatering, makes volume is dewatering front volume 1/2 of the radioactive waste ion exchange resin after dewatering.
Further, it is characterised in that step (II) adopts air conveying mode the radioactive waste ion exchange resin after dewatering is carried stainless steel cask.
Further, in step (III), adopting the mode of microwave orientation heating to be dried, dry run discontinuous ground starts microwave transmission.
Further, start the operating clearance of microwave transmission at twice, repeat the conveying operations of step (II).
A kind of drying device being capable of above-mentioned radioactive waste ion exchange resin microwave bucket inner drying method provided by the invention, it is located in drying cabin for containing the stainless steel cask of radioactive waste ion exchange resin including drying cabin and movable type, being connected to microwave heating module and inventiona gas treatment module on drying cabin, microwave heating module includes the microwave operation conditions measuring instrument being located at drying cabin top microwave generating element, the microwave shielding structure being located in drying cabin and being connected with power supply box.
Further, microwave shielding structure is made up of the Ferrite Material being located in the inner bottom surface groove of drying cabin top and the micro-wave screening cover that is connected with drying cabin top inner bottom surface; Micro-wave screening cover is cylindrical, and its top is connected to the periphery of drying cabin top inner bottom surface groove, its underpart opening.
Further, inventiona gas treatment module includes being located at forcing admission line, forced exhaust pipeline and being located at the automatic import/exhaust pipeline of drying cabin top or bottom of drying cabin top.
Further, the top of drying cabin is provided with the feed pipe carrying radioactive waste ion exchange resin to be dried in stainless steel cask, and feed pipe is provided with automatic open and close valve; The bottom of drying cabin is provided with the hoistable platform of carrying stainless steel cask; The side of drying cabin is provided with hatch door.
Further, this device also includes being located on drying cabin photographing module, temperature monitoring module and the remote control module being connected with drying cabin.
The beneficial effects of the present invention is:
First, a kind of radioactive waste ion exchange resin microwave bucket inner drying method provided by the invention, the advantages such as when mainly utilizing microwave heating local, penetration capacity is strong, moisture evaporates from inside to outside, the process time is short, such that it is able to replace the external electricity conventional in radioactive waste ion exchange resin bucket inner drying field, oil or Infrared Heating mode, and adopt the setting-out evaporation technique of microwave, it is possible to be prevented effectively from the removal that radionuclide seethes with excitement with moisture.
Second, the invention provides and a kind of be fabricated to the method that radioactive waste ion exchange resin is processed by portable drying device, dry run is made to become more convenient, dried radioactive waste ion exchange resin can be stored with stainless steel cask or dispose, decrease intermediate link, effectively reduce the probability of escape of radioactivity.
3rd, the drying device that above-mentioned drying means can be realized provided by the invention, it is possible to achieve inputting continuously and carrying out dried waste ion-exchang resin, the capital equipment of this device is integrated in drying cabin, it is simple to management and use; And, dry run completes in the stainless steel cask in drying cabin, avoid in dry run radionuclide for the pollution of equipment and environment, it is to avoid personnel directly contact with radioactive, effectively prevent secondary pollution and the probability that personnel are damaged; Additionally, this device utilizes the selectivity heating of microwave and the feature that thermal inertia is little, it is possible to achieve automatically control.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of radioactive waste ion exchange resin microwave bucket inner drying method provided by the present invention;
Fig. 2 is the structural representation of a kind of drying device that can realize the inventive method.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As it is shown in figure 1, a kind of radioactive waste ion exchange resin microwave bucket inner drying method provided by the present invention, comprise the steps:
(I) by radioactive waste ion exchange resin dewatering.
During concrete operations, generally the radioactive waste ion exchange resin being temporarily stored into user site is delivered to stainless steel cask (generally adopting the standard stainless steel cask of 200L, the stainless steel cask described in embodiment refers both to the standard stainless steel cask of 200L); Radioactive waste ion exchange resin for being temporarily stored into user site generally adopts the mode of Hydraulic transportation to deliver into dewatering metering device from resin reservoir, then adopts air pressure dewatering.
(II) radioactive waste ion exchange resin after dewatering is delivered in stainless steel cask.
Generally, after air pressure dewatering, air conveying mode is adopted to be delivered in stainless steel cask by the radioactive waste ion exchange resin after dewatering.
(III) utilize microwave that the radioactive waste ion exchange resin being contained in stainless steel cask is dried process, and temperature is monitored.
In this step, adopt the mode of microwave orientation heating, be only dried, due to the characteristic that the thermal inertia of microwave is little, very easily realize automatically controlling.
By the monitoring to temperature in dry run, reach the control to tail gas, it is possible to avoid the removal of overwhelming majority nucleic and the generation of two English.
(IV) reach after predetermined filling rate until stainless steel cask, stop dry, carry out sealing process up for safekeeping.
The volume of dried waste ion-exchang resin is about original half, through repeatedly feed supplement and be dried, after making stainless steel cask reach certain filling rate, adopts mechanical pressure capping.
After capping, it is possible to stored together with stainless steel cask by dried waste ion-exchang resin, this avoid intermediate link, reduce the probability of escape of radioactivity. It is of course also possible to store loading after the waste ion-exchang resin after compression drying in high integrity container.
Adopt method provided by the invention to be dried by nuclear grade ion-exchange resins, and calculate its water evaporation rate, volume, the isoparametric change of moisture content. Result of the test shows, in processing procedure, water evaporation rate is 5��6kg/h, being about 5% for dry about the 25min desciccate moisture content of nuclear grade ion-exchange resins that 7��8L moisture content is about 50%, reached the ultimate value of Theoretical Calculation, volume is original 1/2 after treatment by using the treatment method.
As shown in Figure 2, the drying device being capable of above-mentioned radioactive waste ion exchange resin microwave bucket inner drying method provided by the invention, it is located in drying cabin 1 for containing the stainless steel cask 5 of radioactive waste ion exchange resin including drying cabin 1 and movable type, being connected to microwave heating module 2 and inventiona gas treatment module on drying cabin 1, microwave heating module 2 includes being located at the microwave generating element at drying cabin 1 top, the microwave shielding structure being located in drying cabin 1 and and the microwave operation conditions measuring instrument that connects of power supply box. Microwave generating element is formed by combining by magnetron, waveguide, high voltage power supply and silicon stack. Microwave operation conditions measuring instrument is by current situation monitoring microwave operational situation.
In the present invention, stainless steel cask 5 for containing radioactive waste ion exchange resin is only admitted to when being dried operation in drying cabin 1, and to be dried complete, stainless steel cask 5 is sent drying cabin 1, carrying out subsequent storage operation, therefore stainless steel cask 5 movable type is located in drying cabin 1. The side of drying cabin 1 is provided with hatch door 10, to facilitate transport stainless steel cask 5 into and out of drying cabin 1. Vehicle generally adopts mechanical fixed-type external bracket to realize with fork truck for power.
Microwave shielding structure is made up of the Ferrite Material being located in the inner bottom surface groove of drying cabin 1 top and the micro-wave screening cover 11 that is connected with drying cabin top inner bottom surface. The shape and structure that micro-wave screening cover 11 adopts and stainless steel cask 5 adapts, in the present embodiment, micro-wave screening cover 11 is surrounded cylindrical shape by stainless steel material, and its top is connected to the periphery of drying cabin top inner bottom surface groove, its underpart opening. When stainless steel cask 5 is in operating position, its top extend in micro-wave screening cover 11.
For the ease of ascending, descending stainless steel cask 5, it is possible to arrange hoistable platform 6 in the bottom of drying cabin 1. Hoistable platform 6 adopts hydraulic-driven, in conjunction with machinery location and travel switch, and coordinates level altitude lock to realize. Stainless steel cask 5 is made to enter in micro-wave screening cover 11 by promoting platform 6, continue to lift up platform 6, make the end face of stainless steel cask 5 and top inner bottom surface close contact (now stainless steel cask 5 is in operating position) of drying cabin 1, in order to utilize microwave to be dried fully.
For realizing the continuous conveying of radioactive waste ion exchange resin to be dried, drying cabin 1 can be located at the lower section of water logging device, and the feed pipe being connected with the outlet of water logging device is set at the top of drying cabin 1, feed pipe can arrange automatic open and close valve, thus automatically controlling fill process.
In assembly of the invention, inventiona gas treatment module includes being located at forcing admission line 7, forced exhaust pipeline 8 and being located at the automatic import/exhaust pipeline 9 of drying cabin 1 top or bottom of drying cabin 1 top. Air intake installation 7 is forced to be positioned at the effective diameter scope that drying cabin 1 top is corresponding with stainless steel cask 5, for supplementing fresh air in dry run in trend device, with the steam that carrier band dry run produces; Forced exhaust unit 8 is positioned at the effective diameter scope that drying cabin 1 top is corresponding with stainless steel cask 5, continuously opens in dry run, and the steam to ensure evaporation can be discharged smoothly; Auto-admission/exhaust apparatus 9 is positioned on the sidewall of drying cabin 1, for the pressure regulated in dry run in drying cabin 1.
Additionally, photographing module 3, temperature monitoring module 4 and the remote control module that is connected with drying cabin that this drying device also includes being located on drying cabin.
Photographing module 3 is arranged within the scope of the effective diameter that drying cabin 1 top is corresponding with stainless steel cask 5, and photographic head is positioned at drying cabin top. Adopt armorplate glass effectively to isolate between photographing module 3 and stainless steel cask 5, and configure light source.
Temperature monitoring module 4 is arranged within the scope of the effective diameter that drying cabin 1 top is corresponding with stainless steel cask 5, adopts infrared contactless temperature-measuring.
Remote control module includes PLC control unit, infrared temperature controller, various appliance controling element, connects with special-purpose high temperature, high-voltage line. Control system adopts PLC program to control, and according to the difference of concrete operating mode, operational factor can be modified. Mainly realize electrical equipment control (microwave magnetron, temperature detection) and servo control mechanism (motor). In work process after power initiation, controlling high tension generator energising by the pre-set programs of PLC and realize the generation of microwave, microwave operational status monitoring starts simultaneously, and infrared temperature monitoring starts; Servo control mechanism starts, by the lifting of PLC pre-set programs control realization 200L bucket.
The workflow of a kind of radioactive waste ion exchange resin microwave bucket inner drying device provided by the present invention is as follows:
First turn on dry hatch door 10, fork truck or other instruments is used to be positioned on hoistable platform 6 by load support and stainless steel cask fixed thereon 5, controlling hoistable platform 6 rising makes stainless steel cask 5 enter in micro-wave screening cover 11 and eventually arrive at operating position, closes dry hatch door 10; It is then turned on feed arrangement, radioactive waste ion exchange resin after dewatering is added in batches in stainless steel cask 5, the amount of the radioactive waste ion exchange resin every time added is with the volumenometer of water logging device (having applied for other patents), it is possible to realize being automatically adjusted at 10L to 20L; It is then turned on microwave heating module 2, microwave transmission is opened in whole dry run discontinuous, adopt pulsed control mode that waste ion-exchang resin in bucket is dried, force air intake installation 7 and forced exhaust unit 8 continuous service, to ensure waste ion-exchang resin character in dry run, and monitor microwave operation conditions at any time; After the filling rate of stainless steel cask 5 reaches certain value, close feed arrangement and microwave heating module 2 successively, controlling hoistable platform 6 makes the stainless steel cask 5 equipped with dried radioactive waste ion exchange resin land from operating position, after a barrel outside wall temperature reaches certain value, opened door 10, take out stainless steel cask 5 and cover, the stainless steel cask 5 after capping is transferred to temporary library.
Resin mentioned above adds in batches, and for feed way, the inlet amount namely controlling each batch of resin has reached better drying effect;Intermittently starting microwave, for mode of heating, namely reaches better drying effect by the intermittent start and stop of microwave; The purpose of the two is for reaching better drying effect, without internal relation, but can reach better drying effect in conjunction with use.
It should be noted that before this drying device uses, it is necessary to each capital equipment is checked, it is ensured that the safety of drying device. Simplest inspection method is, uses the overall process of on-radiation ion exchange resin simulation drying process, can smoothly complete drying process extremely qualified.
Above-described embodiment is the illustration to the present invention, and the present invention can also implement with other ad hoc fashion or other particular form, without departing from idea of the invention or substitutive characteristics. Therefore, the embodiment of description from the viewpoint of any be regarded as illustrative but not determinate. The scope of the present invention should be illustrated by appended claims, and the change of any intention with claim and scope equivalence also should be within the scope of the present invention.
Claims (10)
1. a radioactive waste ion exchange resin microwave bucket inner drying method, comprises the following steps:
(I) by radioactive waste ion exchange resin dewatering;
(II) radioactive waste ion exchange resin after dewatering is delivered in stainless steel cask;
(III) utilize microwave that the radioactive waste ion exchange resin being contained in stainless steel cask is dried process, and temperature is monitored;
(IV) reach after predetermined filling rate until stainless steel cask, stop dry, carry out sealing process up for safekeeping.
2. a kind of radioactive waste ion exchange resin microwave bucket inner drying method according to claim 1, it is characterized in that, step (I) adopts air pressure dewatering, makes volume is dewatering front volume 1/2 of the radioactive waste ion exchange resin after dewatering.
3. a kind of radioactive waste ion exchange resin microwave bucket inner drying method according to claim 1, it is characterised in that adopt air conveying mode that the radioactive waste ion exchange resin after dewatering is carried stainless steel cask in step (II).
4. according to the arbitrary a kind of described radioactive waste ion exchange resin microwave bucket inner drying method of claim 1-3, it is characterized in that, in step (III), adopting the mode of microwave orientation heating to be dried, dry run discontinuous ground starts microwave transmission.
5. a kind of radioactive waste ion exchange resin microwave bucket inner drying method according to claim 4, it is characterised in that start the operating clearance of microwave transmission at twice, repeat radioactive waste ion exchange resin conveying operations in step (II).
6. for realizing the drying device of the arbitrary a kind of described radioactive waste ion exchange resin microwave bucket inner drying method of claim 1-5, it is characterized in that, it is located in drying cabin (1) for containing the stainless steel cask (5) of radioactive waste ion exchange resin including drying cabin (1) and movable type, drying cabin (1) is connected to microwave heating module (2) and inventiona gas treatment module, microwave heating module (2) includes the microwave generating element being located at drying cabin (1) top, it is located at the microwave shielding structure in drying cabin (1) and the microwave operation conditions measuring instrument being connected with power supply box.
7. drying device according to claim 6, it is characterized in that, microwave shielding structure is made up of the Ferrite Material being located in the inner bottom surface groove of drying cabin (1) top and the micro-wave screening cover (11) that is connected with drying cabin (1) top inner bottom surface;Micro-wave screening cover (11) is cylindrical, and its top is connected to the periphery of drying cabin (1) top inner bottom surface groove, its underpart opening.
8. the drying device according to claim 6 or 7, it is characterized in that, inventiona gas treatment module includes being located at the pressure admission line (7) at drying cabin top, forced exhaust pipeline (8) and being located at the automatic import/exhaust pipeline (9) of drying cabin top or bottom.
9. drying device according to claim 8, it is characterized in that, the top of drying cabin (1) is provided with the feed pipe carrying radioactive waste ion exchange resin to be dried in stainless steel cask (5), and feed pipe is provided with automatic open and close valve; The bottom of drying cabin (1) is provided with the hoistable platform (6) of carrying stainless steel cask; The side of drying cabin (1) is provided with hatch door (10).
10. drying device according to claim 7, it is characterized in that, photographing module (3) that this device also includes being located on drying cabin (1), temperature monitoring module (4) and the remote control module being connected with drying cabin (1).
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| CN106328237B (en) * | 2015-06-29 | 2019-04-23 | 中国辐射防护研究院 | A kind of carbonization of radioactive waste ion exchange resin microwave, cineration technics and dedicated unit |
| CN107894147A (en) * | 2017-12-27 | 2018-04-10 | 宁波浙达技术服务有限公司 | One kind automation pharmaceutical machine drying unit |
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| CN108759315A (en) * | 2018-06-14 | 2018-11-06 | 中国核电工程有限公司 | Microwave drier in a kind of bucket |
| CN110211721A (en) * | 2019-07-11 | 2019-09-06 | 中国工程物理研究院应用电子学研究所 | A kind of drying device and drying means for reactor core wastewater treatment based on microwave |
| CN111128429A (en) * | 2019-12-31 | 2020-05-08 | 西安交通大学 | Drying device and drying method for radioactive concentrated solution in microwave bucket |
| CN111681798B (en) * | 2020-04-30 | 2022-09-27 | 中国辐射防护研究院 | Small-size nuclear facility field radioactivity effluent treatment plant that retires |
| CN113267001A (en) * | 2021-05-14 | 2021-08-17 | 中国核电工程有限公司 | Drying device and drying method for radioactive zirconium cladding pipe section |
| CN113405322A (en) * | 2021-06-23 | 2021-09-17 | 中国核动力研究设计院 | Drying device in radioactive waste liquid drying barrel and waste liquid drying barrel comprising same |
| CN114440571A (en) * | 2022-02-14 | 2022-05-06 | 四川无及科技有限公司 | Industrial drying method and device for radioactive slurry |
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| CN85103922B (en) * | 1984-06-08 | 1987-04-15 | 株式会社日立制作所 | Method and device for disposal of waste ion-exchang resin |
| JP4374776B2 (en) * | 2000-12-19 | 2009-12-02 | 富士電機ホールディングス株式会社 | Radioactive waste volume reduction device and operation method thereof |
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| CN201375887Y (en) * | 2009-03-02 | 2010-01-06 | 中国核电工程有限公司 | Tapered mixer stirring outside barrel |
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