CN114843000A - Radioactive biological waste treatment system and method - Google Patents
Radioactive biological waste treatment system and method Download PDFInfo
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- CN114843000A CN114843000A CN202210426421.5A CN202210426421A CN114843000A CN 114843000 A CN114843000 A CN 114843000A CN 202210426421 A CN202210426421 A CN 202210426421A CN 114843000 A CN114843000 A CN 114843000A
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- 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
- G21F9/28—Treating solids
- G21F9/30—Processing
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- 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
- G21F9/02—Treating gases
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- 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
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/12—Processing by absorption; by adsorption; by ion-exchange
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Abstract
The invention discloses a radioactive biological waste treatment system and a method. The system comprises: a microwave drying device configured to microwave dry the waste; the vacuum pump is connected with the microwave drying device and is used for forming a vacuum environment in the microwave drying device; a treatment device, wherein the product generated in the microwave drying device is discharged out of the system after being treated by the treatment device; the processing device comprises: the condensing device is connected between the microwave drying device and the vacuum pump and is used for condensing the gas exhausted by the microwave drying device to obtain a liquid product and a gas product; a first purification device connected to the condensing device and configured to remove organic matter from the liquid product; and the second purification device is connected with the vacuum pump and is used for removing organic matters in the gas product.
Description
Technical Field
The invention relates to the technical field of radioactive waste treatment, in particular to a radioactive biological waste treatment system and a method.
Background
With the widespread use of nuclear technology in industry, agriculture, medicine, and scientific research, correspondingly, large amounts of radioactive waste are generated. The development of radioactive experiments, among other things, results in the production of large amounts of radioactive biological waste, such as experimental animal carcasses, tissues, excretions, etc., and plants or remains of part plants.
For the treatment of radioactive biological waste, formalin is generally adopted in the prior art for soaking the radioactive biological waste, and then cement is used for solidification and is sent to a waste disposal center; or the frozen stock is accumulated and then is processed. However, formalin solution has a risk of leakage and is poor in safety; storage takes up a large amount of space.
Accordingly, there is a need to provide an improved radioactive biological waste treatment solution.
Disclosure of Invention
The present invention is directed to a radioactive biological waste treatment system and method to solve at least one of the above problems.
According to an aspect of the present invention, there is provided a radioactive biological waste treatment system, including: a microwave drying device configured to microwave dry the waste; the vacuum pump is connected with the microwave drying device and is used for forming a vacuum environment in the microwave drying device; a treatment device, wherein the product generated in the microwave drying device is treated by the treatment device and then is discharged out of the system; the processing device comprises: the condensing device is connected between the microwave drying device and the vacuum pump and is used for condensing the gas exhausted by the microwave drying device to obtain a liquid product and a gas product; a first purification device connected to the condensing device and configured to remove organic matter from the liquid product; and the second purification device is connected with the vacuum pump and is used for removing organic matters in the gas product.
According to another aspect of the present invention, there is provided a radioactive biological waste treatment method, comprising: subjecting the waste to microwave drying under vacuum conditions; treating a product generated by microwave drying and then discharging the treated product; wherein, the treatment of the product generated by microwave drying comprises the following steps: condensing gas generated by microwave drying to obtain a liquid product and a gas product; removing organic matter from the liquid product; removing organic matter from the gaseous product.
In the radioactive biological waste treatment system provided by the embodiment of the invention, the waste is subjected to microwave drying by the microwave drying device, so that the volume of the waste can be reduced, the rapid and efficient drying is realized, and the solid left after drying is more convenient for subsequent treatment. Meanwhile, gas generated in the microwave drying process is condensed, and the liquid product and the gas product obtained by condensation are respectively treated to remove organic matters in the gas product, so that the treated liquid and gas can meet the emission requirement.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.
FIG. 1 shows a schematic view of a radioactive biological waste treatment system according to one embodiment of the present invention;
FIG. 2 shows a schematic view of an enclosure of a drying chamber of the radioactive biological waste treatment system of FIG. 1;
FIG. 3 shows a schematic structural view of a microwave catalytic device of the radioactive biological waste treatment system of FIG. 1;
fig. 4 shows a flow diagram of a radioactive biological waste treatment method according to one embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
Fig. 1 shows a schematic view of a radioactive biological waste treatment system according to one embodiment of the present invention. As shown in fig. 1, the system includes: a microwave drying device 10 configured to microwave dry the waste; a vacuum pump 20 connected to the microwave drying device 10 for forming a vacuum environment inside the microwave drying device 10; a processing device, wherein the product generated in the microwave drying device 10 is discharged out of the system after being processed by the processing device; the processing device comprises: a condensing unit 30 connected between the microwave drying unit 10 and the vacuum pump 20, configured to condense the gas exhausted from the microwave drying unit 10 to obtain a liquid product and a gas product; a first purification device connected to the condensing device 30 and configured to remove organic matter from the liquid product; a second purification means connected to the vacuum pump 20 and configured to remove organic matter from the gaseous product. Arrow a in fig. 1 shows that the liquid product is sent to the post-treatment equipment and arrow B shows that the gaseous product is sent to the post-treatment equipment.
In some embodiments, the first purification device is further configured to remove traces of radionuclides in the liquid product, and the second purification device is further configured to remove traces of radionuclides in the gaseous product.
The vacuum microwave drying technology is a drying means for dehydrating the material at low temperature to dry the material by utilizing the sublimation and evaporation properties of water under the conditions of low temperature and low pressure. The vacuum pump 20 evacuates the microwave drying apparatus 10 so that a vacuum environment is obtained in the microwave drying apparatus 10. Under the vacuum condition, the microwave and the waste are directly acted through microwave radiation heating, so that the inside and the outside of the waste are simultaneously heated, heat is not required to be transferred through convection or conduction, the moisture in the waste is evaporated in a temperature-rise-free state, and the rapid and efficient drying is realized. The microwave drying device 10 can dry the waste to the moisture content of less than 4%, and meets the receiving requirement of near-surface treatment of a disposal site.
The waste to be treated may be pre-treated by sorting and crushing before being transferred to the microwave drying apparatus 10. In some embodiments, the microwave drying temperature is set to less than 50 ℃, the vacuum condition of the microwave drying is 12000Pa or less, the drying operation time is less than 24 hours, the weight of the single waste block does not exceed 5kg, and the water content of the dried waste is less than 1-5%.
In some embodiments, the microwave drying apparatus 10 includes: a drying chamber 12 connected to a vacuum pump 20; a susceptor 14 disposed within the drying chamber 12; and the rotating mechanism 16 is connected with the bearing piece 14 and drives the bearing piece 14 to rotate. The microwave drying device 10 further comprises a microwave cavity 11, and a drying cavity 12 is arranged in the microwave cavity 11 and receives microwave radiation. The cavity door of the microwave cavity 11 can be made of common glass, lead-containing shielding glass and the like according to the different radiation levels and ray types of the materials to be treated. The microwave drying device 10 is externally provided with a protective sleeve, the protective sleeve can be made of lead-free environment-friendly flexible shielding materials, such as shielding materials synthesized by tungsten bismuth powder and organic materials, and the protective sleeve can be arranged to avoid radiation damage to the environment and workers caused by material permeation due to long-time work of equipment.
The vacuum pump 20 evacuates the drying chamber 12 to form a vacuum environment therein. The waste to be treated is subjected to microwave drying in the drying chamber 12. The waste to be treated is placed on the support 14 and rotates along with the support 14, so that the uniformity of dehydration and drying can be ensured. The rotating mechanism 16 may include a motor and a transmission shaft, the motor drives the transmission shaft to rotate, and the transmission shaft is connected to the supporting member 14 to rotate the supporting member 14. The rotation mechanism 16 may be arranged below the drying chamber 12, the motor is arranged outside the microwave chamber 11, and the transmission shaft passes through the housing of the microwave chamber 11 and the housing of the drying chamber 12 into the drying chamber 12. The support 14 may be in the form of a bracket or a tray, the bracket may be made of a metal material such as stainless steel, nickel-based alloy, etc., and the tray may be made of a polypropylene material.
Fig. 2 shows a schematic view of the outer shell of the drying chamber 12. As shown in fig. 2, the housing of the drying chamber 12 includes: a first frame 122 made of a metal material; and the surrounding plate 124 is laid on the surface of the first frame 122, and the surrounding plate 124 is made of polypropylene material. The enclosing plate 124 made of polypropylene materials is spliced and laid on the first frame 122 made of metal materials to form the shell of the drying chamber 12, so that the drying chamber 12 can be ensured to have stronger strength and can cope with vacuum suction deformation; moreover, the microwave energy can penetrate into the drying cavity 12 to dry the materials without causing large microwave loss.
Referring to fig. 1, the system further comprises a feeding and discharging device 50 comprising: a second frame 52; a loading plate disposed on a surface of the second frame 52; and a roller 54 provided at the bottom of the second frame 52. The carrier plate is used to carry the waste or solids left after the waste has been microwave dried. The inlet and outlet means 50 are advantageously movable into and out of the drying chamber 12 by the rollers 54 and reduce the contact between the person and the material. The feeding and discharging device 50 carrying the waste to be treated enters the drying chamber 12, is placed on the supporting member 14, the waste is subjected to microwave drying in the drying chamber 12, the solid remained after drying is continuously carried in the feeding and discharging device 50, and then the feeding and discharging device 50 can send the dried solid out of the drying chamber 12. The system also includes a conveyor 60 that transports the feed and discharge device 50 between the microwave drying apparatus 10 and other equipment.
The second frame 52 may be made of metal material, so as to ensure high strength of the feeding and discharging device 50. The carrier plate may be of microwave low loss material to allow microwave energy to pass through. The bearing plate can be made of PEK (polyether ketone) or ceramic non-metallic materials, so that the bearing plate has better strength and plasticity, and the flatness of a contact surface with a material can be ensured. The rollers 54 may be made of a low loss non-metallic material.
The system further comprises: a monitoring module configured to monitor in real time a plurality of the following parameters of the microwave drying apparatus 10: current, voltage, temperature, vacuum, load weight. The monitoring module also has the functions of video monitoring, energy consumption tracking and the like. By arranging the monitoring module, the microwave drying state can be known, and the research and the application such as drying characteristic (such as moisture content) inference, process optimization and the like are facilitated. The monitoring module may include various types of sensors. The system also comprises an electric control cabinet and a matched public electric automatic control unit, and adopts PLC feedback control.
The products produced within the microwave drying apparatus 10 include gases and solids. Under the action of the vacuum pump 20, the generated gas is sent to the condensing device 30, the condensable part of the gas is condensed at the condensing device 30 to form liquid products, the liquid products are collected, the non-condensable part of the gas forms gas products and is pumped away under the action of the vacuum pump 20, and the liquid products and the gas products are respectively treated by the first purifying device and the second purifying device and then are discharged. The solids produced remain in the microwave drying apparatus 10 and can be discharged for subsequent processing.
In some embodiments, the condensing unit 30 may comprise a low temperature brine condensing plate on which the condensable portion of the gas condenses and is collected to produce a liquid product, the condensing temperature being less than 15 ℃. The condensing unit 30 may be configured with a chiller to exchange heat.
The inventor of the application finds that trace volatile organic matters are generated in the liquid product generated by microwave drying of the radioactive biological waste, so that the invention utilizes the first purification device to remove the organic matters in the liquid product. At the first purification device, organic matter in the liquid product is absorbed by an organic absorbent. In some embodiments, the organic absorber employs curing agent GY 620. The curing agent GY620 is a high polymer material, can absorb and wrap organic waste liquid in a high polymer structure, has large curing capacity, 1 part by mass of GY620 can absorb 2-4 parts by mass of organic waste liquid, the formed cured body is stable, the organic waste liquid is difficult to precipitate, and the amount of the precipitated organic liquid is less than 0.5 percent even under the pressure of 10 MPa. The curing agent GY620 does not contain salt, does not leave ash when incinerated, and has high irradiation stability, even the performance is not changed under the irradiation dose of 1E6Gy gamma. The organic absorbent may be packaged in the form of a plurality of packages. The TOC (total organic carbon) content in the liquid product is less than 150PPM and the COD (chemical oxygen demand) content meets the discharge standard of industrial wastewater through the action of the organic absorbent.
In some embodiments, the processing device further comprises: a detection device configured to detect an organic content in the liquid product; wherein when the organic content is greater than a predetermined value, the liquid product is transferred to the first purification device; when the organic content is not more than a predetermined value, the liquid product may be discharged out of the system. That is, the treatment method of the liquid product is selected according to the detection result of the organic matter content.
The means for detecting the organic content may include detecting a TOC (total organic carbon) content or a COD (chemical oxygen demand) content. When the TOC content in the liquid product exceeds 150PPM, the liquid product is transferred to a first purification device, organic matters in the liquid product are absorbed by an organic absorbent, and the liquid product is treated at the first purification device until the TOC content is not more than 150PPM and then can be discharged out of the system.
Similarly, microwave drying of radioactive biological waste produces a gaseous product that also contains organic matter, such as certain malodorous gases. The invention thus utilizes a second purification device to remove organic matter from the gaseous product.
In some embodiments, the second purification device comprises a microwave catalytic device 40. Fig. 3 shows a schematic structural diagram of the microwave catalytic device 40. As shown in fig. 3, the microwave catalytic apparatus 40 includes: a reaction chamber 42 in which a catalyst 44 is disposed; a microwave generating device 46 configured to emit microwaves into the reaction chamber 42; wherein, the gas product passes through the reaction cavity 42, and undergoes a chemical reaction under the combined action of the microwave and the catalyst to decompose organic matters in the gas product, so as to obtain a reacted gas.
The microwave catalytic device 40 adopts a microwave high-temperature combined catalytic form and a microwave combustion-supporting principle, and can effectively treat various substances in gas products, decompose organic matters and obtain colorless, tasteless and harmless reacted gas.
Radioactive biological waste may contain 3 H、 14 C, and the like. Can determine whether the waste to be treated contains the waste according to the waste source items 3 H or 14 C. The method of performing the post-treatment of the reacted gas is selected from various cases including any one of them and all the cases. The gas exiting microwave catalytic assembly 40 may also be monitored to determine whether it contains any gas therein 3 H or 14 C。
For inclusion in waste to be treated 3 H does not contain 14 In case C, the second purification apparatus further comprises: and the water removal device is connected with the microwave catalytic device 40 and is used for removing the moisture in the reacted gas. The water removing device can utilize CuSO 4 And CaO, etc. to remove water. The reacted gas may be vented out of the system, for example to the atmosphere, after moisture removal.
For inclusion in waste to be treated 14 C does not contain 3 H, the second purification apparatus further comprises: and the alkali liquor absorption device is connected with the microwave catalytic device 40 and is used for removing the carbon dioxide in the reacted gas. The reacted gas may exit the system after removal of carbon dioxide.
For simultaneous inclusion in the waste to be treated 3 H and 14 in case C, the second purification apparatus further comprises: the alkali liquor absorption device is connected with the microwave catalytic device 40 and is used for removing carbon dioxide in the reacted gas; and the water removing device is connected with the alkali liquor absorbing device and is used for removing moisture in the reacted gas. I.e. removing carbon dioxide first and then water. The reacted gas may exit the system after removal of carbon dioxide and moisture.
For the waste to be treated not to contain 3 H also does not contain 14 In the case of C, the reacted gas may be directly discharged out of the system.
In some implementations, the second purification device is provided with a gas outlet from which the gaseous product exits the system after being treated by the second purification device; the processing apparatus further comprises: and active carbon filter members disposed at the air inlet and the air outlet of the vacuum pump 20 and disposed at the air exhaust port. The active carbon filter element can be an active carbon fiber filter screen and is used for filtering and adsorbing volatile organic gas generated in the treatment process and volatile gas of vacuum pump oil.
The system may include a solids treatment device configured to collect, grind and then transport solids produced by microwave drying outside the system, for example to a medium to low level waste disposal site for incineration or near surface disposal. The solid processing device is also used for sieving the powder obtained after grinding. The powder obtained after grinding can be sampled and vacuum-packed, and then the sample is sent for water content analysis, solid component analysis, bulk density analysis, radionuclide specific activity analysis and the like.
In the embodiment of the invention, the vacuum microwave drying technology is utilized to treat the radioactive biological waste, the biochemical reactivity of the waste can be destroyed, and the radioactive biological waste produced by different units can be treated. The generated gas is subjected to multi-stage absorption filtration and microwave catalytic treatment until reaching the standard of emission and then is discharged; the waste residues and liquid wastes produced can be further treated according to the radioactivity level, such as: controlling, solidifying, storing, disposing near the surface, etc. Therefore, through the drying treatment of the microwave drying device, the problems of waste storage, radiation safety management and final disposal of waste generation units can be solved, the storage capacity requirement is reduced, the waste management cost is reduced, and worries after research on radionuclide utilization can be better and more safely carried out by nuclear technology units. The generated gas, liquid and solid are treated to meet the emission standard and the receiving standard, and the safety of the surrounding environment and the public is ensured. In addition, the microwave drying device, the air pump, the condensing device, the first purifying device, the second purifying device and the like are all independent units, so that the field assembly of the whole equipment is facilitated.
The system of the present invention can treat waste resin, silica gel, contaminated soil, and/or the like, in addition to radioactive biological waste.
According to another aspect of the present invention, there is provided a radioactive biological waste treatment method. Fig. 4 shows a flow diagram of a radioactive biological waste treatment method according to one embodiment of the present invention. As shown in fig. 4, the method includes:
subjecting the waste to microwave drying under vacuum conditions;
treating a product generated by microwave drying and then discharging the treated product;
wherein, the treatment of the product generated by microwave drying comprises the following steps:
condensing gas generated by microwave drying to obtain a liquid product and a gas product;
removing organic matter from the liquid product;
removing organic matter from the gaseous product.
In the microwave drying process, the vacuum degree of the microwave drying device can be kept unchanged within a first preset time, and the approach of the microwave drying process to the end point is determined; the first preset time may be 30 min.
Further, the following parameters of the microwave drying apparatus may be obtained: current, voltage, temperature, vacuum degree, bearing weight; and comprehensively judging the parameters to determine that the microwave drying process reaches the end point, thereby finishing the operation of the microwave drying device.
In the microwave drying process, the gas generated by the microwave drying process can be sampled at intervals of a second preset time, and the components of the sampled gas can be analyzed. The second preset time may be 1 hour. In one embodiment, after the vacuum in the microwave drying apparatus is established for more than 30 minutes, 1.5L of gas sample is pumped on the sampling pipe using a gas sampling bag every 1 hour for analyzing the composition of the sampled gas.
In some embodiments, the removing the organic matter in the liquid product comprises: and absorbing organic matters in the liquid product by using an organic absorbent.
In some embodiments, the removing the organic matter in the liquid product comprises: detecting the content of organic matters in the liquid product; and when the content of the organic matters is larger than a preset value, removing the organic matters in the liquid product.
The content of organic matters in the liquid product can be detected every third preset time, and when the content of the organic matters is larger than a preset value, the liquid product is transferred to a first purification device, and organic matters in the liquid product are absorbed by an organic absorbent; when the organic content is not greater than a predetermined value, the liquid product may be discharged from the system. The organic content may be a TOC content, the predetermined value may be 150PPM, and the third predetermined time may be 30 min.
In some embodiments, the removing the organic matter in the gaseous product comprises: under the combined action of microwaves and a catalyst, the gas product is subjected to chemical reaction to decompose organic matters in the gas product, so that reacted gas is obtained.
In some embodiments, the method further comprises: if the gas generated by microwave drying is detected to contain 14 C, removing carbon dioxide in the reacted gas by using an alkali liquor absorption device; if the gas generated by microwave drying is detected to contain 3 And H, removing moisture in the reacted gas by using a water removal device.
In some embodiments, the method further comprises: and adsorbing volatile organic compounds and radionuclide gas in the gas product by using an active carbon filter piece so as to filter. The gaseous product may be filtered prior to microwave catalysis, and may be re-filtered after the reaction before the gas exits the system. Thereby through multistage filtration, guarantee that the gas of discharge system satisfies emission standard.
In some embodiments, the microwave drying under vacuum comprises: the waste is caused to rotate during the microwave drying process.
Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of embodiments of the invention and should not be construed as limiting the invention. The various components in the drawings are not to scale in order to clearly illustrate the details of the components, and therefore the proportions of the various components in the drawings should not be taken as limiting.
Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.
Claims (16)
1. A radioactive biological waste treatment system comprising:
a microwave drying device configured to microwave dry the waste;
the vacuum pump is connected with the microwave drying device and is used for forming a vacuum environment in the microwave drying device;
a treatment device, wherein the product generated in the microwave drying device is discharged out of the system after being treated by the treatment device;
the processing device comprises:
the condensing device is connected between the microwave drying device and the vacuum pump and is used for condensing the gas exhausted by the microwave drying device to obtain a liquid product and a gas product;
a first purification device connected to the condensing device and configured to remove organic matter from the liquid product;
and the second purification device is connected with the vacuum pump and is used for removing organic matters in the gas product.
2. The system of claim 1, wherein organic matter in the liquid product is absorbed by an organic absorbent at the first purification device.
3. The system of claim 1, wherein the processing device further comprises: a detection device configured to detect an organic content in the liquid product;
wherein the liquid product is transferred to the first purification device when the organic content is greater than a predetermined value.
4. The system of claim 1, wherein the second purification device comprises: a microwave catalytic device, comprising:
a reaction chamber in which a catalyst is placed;
a microwave generating device configured to emit microwaves to the reaction chamber;
and the gas product passes through the reaction cavity and undergoes a chemical reaction under the combined action of microwaves and a catalyst to decompose organic matters in the gas product to obtain reacted gas.
5. The system of claim 4, wherein the second purification device further comprises:
the alkali liquor absorption device is connected with the microwave catalytic device and is used for removing carbon dioxide in the reacted gas;
and the water removing device is connected with the microwave catalytic device or the alkali liquor absorption device and is used for removing moisture in the reacted gas.
6. The system of claim 1, wherein the second purification device is provided with a gas outlet from which the gaseous product is discharged from the system after being treated by the second purification device;
the processing apparatus further comprises: and the active carbon filtering pieces are arranged at the air inlet and the air outlet of the vacuum pump and are arranged at the air exhaust port.
7. The system of claim 1, wherein the microwave drying device comprises:
the drying cavity is connected with the vacuum pump;
a support member disposed within the drying chamber;
and the rotating mechanism is connected with the bearing piece and drives the bearing piece to rotate.
8. The system of claim 7, wherein the housing of the drying chamber comprises:
the first frame is made of metal materials;
and the coaming is laid on the surface of the first frame and is made of polypropylene material.
9. The system of claim 1, further comprising a feed and discharge device comprising:
a second frame;
the bearing plate is arranged on the surface of the second frame;
and the roller is arranged at the bottom of the second frame.
10. A method of radioactive biological waste treatment comprising:
subjecting the waste to microwave drying under vacuum conditions;
treating a product generated by microwave drying and then discharging the treated product;
wherein, the treatment of the product generated by microwave drying comprises the following steps:
condensing gas generated by microwave drying to obtain a liquid product and a gas product;
removing organic matter from the liquid product;
removing organic matter from the gaseous product.
11. The method of claim 10, wherein the removing the organic matter from the liquid product comprises:
and absorbing organic matters in the liquid product by using an organic absorbent.
12. The method of claim 10, wherein the removing the organic matter from the liquid product comprises:
detecting the content of organic matters in the liquid product;
and when the content of the organic matters is larger than a preset value, removing the organic matters in the liquid product.
13. The method of claim 10, wherein the removing the organic matter from the gaseous product comprises:
under the combined action of microwaves and a catalyst, the gas product is subjected to chemical reaction to decompose organic matters in the gas product, so that reacted gas is obtained.
14. The method of claim 13, further comprising:
if the gas generated by microwave drying is detected to contain 14 C, removing carbon dioxide in the reacted gas by using an alkali liquor absorption device;
if the gas generated by microwave drying is detected to contain 3 And H, removing moisture in the reacted gas by using a water removal device.
15. The method of claim 10, further comprising:
and adsorbing volatile organic compounds and gas containing radionuclide in the gas product by using an active carbon filter element.
16. The method of claim 10, wherein the performing microwave drying under vacuum conditions comprises: the waste is caused to rotate during the microwave drying process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210426421.5A CN114843000A (en) | 2022-04-21 | 2022-04-21 | Radioactive biological waste treatment system and method |
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| CN202210426421.5A CN114843000A (en) | 2022-04-21 | 2022-04-21 | Radioactive biological waste treatment system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117839397A (en) * | 2024-01-03 | 2024-04-09 | 南京港能环境科技有限公司 | Be used for TOC measuring multistage automatic water trap |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117839397A (en) * | 2024-01-03 | 2024-04-09 | 南京港能环境科技有限公司 | Be used for TOC measuring multistage automatic water trap |
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