CN104512913B - A kind of horizontal high density Na 131i production equipment - Google Patents
A kind of horizontal high density Na 131i production equipment Download PDFInfo
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- CN104512913B CN104512913B CN201510037480.3A CN201510037480A CN104512913B CN 104512913 B CN104512913 B CN 104512913B CN 201510037480 A CN201510037480 A CN 201510037480A CN 104512913 B CN104512913 B CN 104512913B
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Abstract
The invention provides a kind of horizontal high density Na
131i production equipment, described production equipment comprises moisture eliminator, water distilling apparatus, purifier, iodine-131 trap, exhaust purifier, vacuum pump, controller.Described moisture eliminator, water distilling apparatus, purifier, iodine-131 trap, exhaust purifier, vacuum pump successively pipeline connect; Water distilling apparatus, purifier, iodine-131 trap are electrically connected with controller respectively.Device of the present invention efficiently can process the TeO from activation
2in the iodine-131 steam that distills, and by wherein about 98% iodine-131 reclaim, obtain the medical grade Na that concentration can be greater than 10Ci/mL
131i solution.Apparatus of the present invention are compact small and exquisite, easy to operate.
Description
Technical field
The invention belongs to radio isotope preparing technical field, be specifically related to a kind of horizontal high density Na
131i production equipment.
Background technology
The main mode of production of radioactivity iodine-131 be adopt the method for distillation from the tellurium dioxide after reactor irradiation and from
235extract in the sliver mixture of U.The radiopharmaceuticals be made up of radioactivity iodine-131 are widely used in modern clinical nuclear medicine Clinics and Practices, the sodium iodide (Na that medical institutions use
131i) radiological materials of the medicine of medicine and iodine-131 mark mainly comes from the tellurium dioxide of reactor irradiation activation, and the main dry distillation that adopts is produced.Dry distillation produces the concise and to the point flow process of iodine-131: the tellurium dioxide of activation poured into quartz container (quartz boat) and put into quartz glass tube high temperature (the about 750 DEG C) distillation of distiller, radioactivity iodine-131 is evaporated from the tellurium dioxide of molten state, taken out of distiller by carrier gas, rear absorption by the dilute NaOH solution in absorption bottle makes Na
131i solution product.
Document shows, China starts destructive distillation from the mid-90 in 20th century and produces iodine-131 technical study, and drops into practical application, the sodium iodide (Na of acquisition
131i) product provides domestic medical institutions to use.Except the invention provides unit-Inst. of Nuclear Physics and Chemistry, Chinese Engineering Physics Research Ins, domestic China Atomic Energy Science Research Institute and Chinese nuclear power source research institute were all once engaged in iodine-131 destructive distillation and produced, and established water distilling apparatus.At present, the device of the destructive distillation production iodine-131 of open report is all horizontal type water distilling apparatus, and adopts the method process radioactivity iodine-131 steam of dilute alkaline soln bubble absorption.Existing production method utilizes mechanical manipulator to pour the raw material opened in target cylinder into quartz boat, sent in the silica tube of distiller by charging quartz boat, install grinding port plug closed quartz tube, open vacuum pump, add thermal distillation (distillation temperature is about 750 DEG C).Shut down cooling after distillation, after furnace chamber temperature is lower than 200 DEG C, take off grinding port plug, take out quartz boat and the quartz boat more renewed, again send into distiller distillation after charging.The existing this mode of production is owing to being subject to the sword formula manipulator clamping of work box configuration and limiting with the safety operation of heavier article of transfer large volume, the small volume (TeO of the quartz boat used
2loading amount is generally less than 100 grams), and only allow in silica tube (diameter is about 60mm) during each distillation and put into a quartz boat, during continuous seepage, need the long period temperature in distilling furnace furnace chamber to be down to less than 200 DEG C (otherwise TeO in high quartz boat
2target material will continue a small amount of radioactivity iodine-131 of overflowing, may to work box, equipment and environment), quartz boat could be taken out, the quartz boat more renewed drops into after again loading raw material and produces next time, per unit area yield can be lower, the quantity of solid waste produced is large, and after furnace chamber temperature is lower than 200 DEG C, is deposited on the TeO bottom horizontal quartz tube after the production equipment long period uses
2cooling after and quartz boat often there is adhesion and affect the operation changing quartz boat, the security of working efficiency and operation is lower; And adopt bottom the absorption bottle that carrier gas passed into sig water is housed, the method of the iodine-131 in carrier gas is absorbed by the mode of bubbling, need carrier gas to be controlled under less flow velocity, and often need to add the sig water of comparatively large vol (being generally greater than 10mL) and the stroke making bubble in sig water is longer, the Na obtained for ensureing to obtain the suction iodine-131 efficiency being greater than more than 95%
131the concentration of I solution, often lower than 0.2Ci/mL, is not less than the Na of 1Ci/mL to obtain concentration
131i solution, then need to adopt and absorb with a sig water the radioactivity iodine-131 steam distilled from many mass productsization tellurium dioxide, or the Na to lower concentration
131i solution carries out concentration, could obtain the Na that concentration meets or exceeds 1Ci/mL
131i solution product.But to there is in carrier gas in a large amount of oxygen and tellurium dioxide raw material acidic volatile impurity to the reductive agent in sig water (as Na in the method that sig water repeats to absorb iodine-131 steam
2sO
3) and the consumption of NaOH, cause Na
131the chemical purity of I reduces and iodine-131 vapor adsorption efficiency reduces and lose Na in still-process
131the risk of I, and the Na to lower concentration
131i solution carries out concentration and deposits NaOH concentration over-standard or Na in the product
+excessive concentration, and Na is lost in still-process
131the risk of I.Particularly at reactor thermal neutron fluence rate lower than 1*10
14n/cm
2when s and irradiation time are less than 3 days, TeO
2in the yield of radioactivity iodine-131 lower, be more difficult to realize high density, Na
131the production in enormous quantities of I solution.And when reactor thermal neutron fluence rate is lower and irradiation time is shorter, only has the treatment capacity by increasing raw material and try one's best and reduce the volume of the sig water absorbing iodine-131 steam, directly could obtain high density Na
131i solution.
Existing horizontal type iodine-131 destructive distillation production equipment exists per unit area yield can less, Na
131i strength of solution is low, production efficiency is lower, radioactive solid waste amount is large and inconvenient stock management, long period use after be deposited on TeO bottom horizontal quartz tube
2after cooling and quartz boat adhesion and affect the problems such as the operation changing quartz boat.Theoretical Calculation shows, even if the quality that the per unit area yield of iodine-131 water distilling apparatus can reach its iodine of 100Ci(Theoretical Calculation is about 8*10
-4g), the amount of all dissolving the NaOH solution of 0.5mol/L needed for the radioactivity iodine-131 trapped only needs about 1.2*10
-2mL, the amount of the sig water added in existing production equipment is far away more than the total amount of dissolving the radioactivity iodine-131 trapped.At present, not yet there are ac.cn and manufacturing enterprise to use this containers such as quartz boat that do not adopt to take up raw material, but raw material is directly poured in distilling furnace realize high density Na
131the open report of the device that I solution is produced.
Summary of the invention
In order to the per unit area yield overcoming horizontal type iodine-131 destructive distillation production equipment of the prior art can less, Na
131i strength of solution is low, production efficiency is lower, radioactive solid waste amount is large and inconvenient stock management, long period use after be deposited on TeO bottom horizontal quartz tube
2after cooling and quartz boat adhesion and affect the deficiency of the operation changing quartz boat, realize the medical Na of High-efficient Production high density
131i solution, and reach the object controlling radiocontamination risk and tail gas qualified discharge, the invention provides a kind of horizontal high density Na
131i production equipment.
The present invention efficiently can process the radioactivity iodine-131 steam that distills from the tellurium dioxide raw material of reactor activation, and by wherein about 98% iodine-131 reclaim the medical Na that preparation concentration is greater than 10Ci/mL
131i solution, it is up to standard that remaining radioactivity iodine-131 steam will be sanitised to environmental emission.The present invention adopt by the raw material of fusing from high to low sluggish flow process therefrom distill out iodine-131, and to be adsorbed by the sig water frozen coating sedimentation that always long-pending body is very little, in frozen coating dissolution process, the iodine-131 of absorption transformed into Na
131i, continuous several times can add TeO in non-stop-machine situation
2raw material, achieves high density Na
131the production in enormous quantities of I solution, and distillation residue are automatically collected at waste material bottle or former splendid attire TeO
2in the discarded target cylinder of raw material, considerably reduce radioactive solid waste amount.
Realize technical scheme of the present invention as follows:
The horizontal high density Na of one of the present invention
131i production equipment, be characterized in, described production equipment comprises moisture eliminator, water distilling apparatus, purifier, iodine-131 trap, exhaust purifier, vacuum pump, controller, its annexation is, described moisture eliminator, water distilling apparatus, purifier, iodine-131 trap, exhaust purifier, vacuum pump successively pipeline connect, and water distilling apparatus, purifier, iodine-131 trap are electrically connected with controller respectively.
Described water distilling apparatus comprises stand, distiller, lifting table, and wherein, the distiller in described water distilling apparatus is the semicolumn bodily form, and its annexation is, described stand is fixedly installed distiller, below distiller, is provided with lifting table.Described distiller comprises process furnace, quartz glass muffle, opening for feed, inlet pipe, discharge port, vapor pipe, quartz glass muffle is provided with in described process furnace, one side of described quartz glass muffle is provided with thermopair, vapor pipe is fixedly installed in another side, the top of quartz glass muffle one end is provided with opening for feed, the bottom of the other end is provided with discharge port.Described opening for feed is provided with grinding port plug, is provided with inlet pipe in grinding port plug, inlet pipe is connected with purifier.Described vapor pipe is connected with iodine-131 trap.The lower end of discharge port is provided with waste material bottle, and waste material bottle is placed on lifting table.Described lifting table, process furnace, thermopair are connected with controller respectively.An angle is provided with between process furnace and the horizontal plane of stand.
The quartz glass muffle of described distiller is the quartz glass tube of the semicolumn bodily form, and the bin stock ware that the baseplane in quartz glass muffle chamber is arranged, claustra, discharge port connect successively.Bin stock ware is corresponding with opening for feed to be arranged.
Described iodine-131 capturing device comprises cold-trap, overflow groove, alkali lye bottle, well heater, nitrogengas cylinder, refrigerating fulid basin, product bottle, its annexation is, described cold-trap is connected respectively with overflow groove, alkali lye bottle, well heater, refrigerating fulid basin, product bottle, alkali lye bottle, well heater, refrigerating fulid basin are connected with nitrogengas cylinder respectively, and cold-trap, product bottle are connected with vacuum pump respectively.Described well heater is connected with controller.
Described cold-trap comprises junctor U-shaped pipe, freezing tank, active carbon adsorption column, and its annexation is, a upper end of described U-shaped pipe is connected with the upper end of active carbon adsorption column, and another upper end is connected with purifier.Described U-shaped pipe, the upper end of active carbon adsorption column are placed in outside freezing tank respectively, lower end to be placed in interior freezing tank and respectively with freezing tank by being welded to connect.The bottom of U-shaped pipe is provided with T-valve I, and T-valve I is connected respectively with alkali lye bottle, product bottle, U-shaped pipe; Described active carbon adsorption column is provided with T-valve II, and T-valve II is connected with exhaust purifier.
One side of the freezing tank in described cold-trap is provided with upflow tube, and upflow tube is connected with overflow groove.The two-way valve I that freezing tank is arranged by bottom, two-way valve II are connected with refrigerating fulid basin, well heater respectively.
The angle arranged between described process furnace and the horizontal plane of stand is 10 degree ~ 30 degree.
Horizontal high density Na of the present invention
131i production equipment make use of
130te (n, γ)
131te (β
-)
131i nuclear physics reaction and
131i and NaOH reaction generates Na
131i, and the larger difference of the sublimation temperature of iodine and compound and tellurium and compound thereof, by controlling the method for Heating temperature destructive distillation, achieve the medical grade Na producing high density from the tellurium dioxide after reactor irradiation in enormous quantities
131i solution product, its concise and to the point principle of work is: with cutting machine, activation TeO will be housed
2the target cylinder of raw material is opened, mechanical manipulator is utilized the raw material opened in target cylinder to be poured into bin stock ware in quartz glass muffle by funnel, then grinding port plug is loaded onto, open controller, under certain condition of negative pressure, add thermal distillation (distillation temperature is about 750 DEG C), the lower radioactivity iodine-131 of sublimation temperature is at the TeO of melting
2be distilled out from bin stock ware to the process of discharge port direction sluggish flow through claustra, with the purified device of carrier gas oriented flow, iodine-131 trap, active carbon adsorption column, exhaust purifier under the power that vacuum pump provides, be caught the previously prepared sig water frozen coating absorption be attached on U-shaped pipe internal surface in storage, and be converted to Na in the slow thaw process of frozen coating
131i solution.
Utilize the major diameter quartz glass tube (diameter can reach more than 200mm) of the semicolumn bodily form as the flue of process furnace in the present invention, do not adopt the container splendid attire TeO such as quartz boat
2raw material, installs process furnace, by funnel directly by the TeO in target cylinder with certain angular slope
2raw material is poured in flue and is implemented the distillation of radioactivity iodine-131; single charge amount can be several times as much as Conventional espresso mode; and can feed continuously under not stopped status; significantly improve production capacity and working efficiency, avoid the large and inconvenient stock management of the radioactive solid waste amount caused by quartz boat of use, the long period use after be deposited on TeO bottom horizontal quartz tube
2after cooling and quartz boat adhesion and affect the problems such as the operation changing quartz boat, and can automatic drawing unloading distillation residue, tellurium dioxide residue after distillation is collected in the waste material bottle being easy to seal or discarded target cylinder and stores, radioactive solid waste amount can be reduced in a large number, be conducive to the safe storage of waste material and reduce radioactive solid waste volume further; Adopt the first U-shaped stainless steel tube at less internal diameter of freezing method (as Ф
in5*100mm) inwall applying the concentration that a layer thickness is about 0.1mm-0.5mm is that (now the cumulative volume of the alkali lye of frozen coating is about 0.15mL-0.7mL to the alkali lye that 0.5mol/L is even rarer, and in frozen coating, the amount of contained NaOH exceedes more than 10 times that all dissolve 100Ci radioactivity iodine-131 aequum.) allow the iodine-131 of deposition all be changed into Na in alkali lye frozen coating thaw process
131i solution, achieves with a small amount of (total amount can lower than 1mL) a large amount of iodine-131 steam of sig water sorption enhanced, significantly improves the production capacity of production equipment and obtain Na
131the concentration of I solution product.
The present invention allows the radioactivity iodine-131 steam of about 250 DEG C through purification process cool deposition on this alkali lye frozen coating under maintenance freezing conditions, after distillation completes, by emptying for the refrigerant in freezing tank, passing into warm air or naturally heating up allows alkali lye frozen coating slowly melt, and the iodine-131 be deposited on alkali lye frozen coating is all changed into Na in this thaw process
131i solution, is collected in the product bottle bottom U-shaped Glass tubing, and the production equipment that can be not less than 2Ci at per unit area yield can obtain the Na of concentration higher than 10Ci/mL
131i solution product.
The present invention adopts the method for the raw materials melt distillation mode of naturally trickle and the freezing coating of employing of loading without quartz boat that the sig water for sorption enhanced iodine-131 steam of (total amount can lower than 1mL) is on a small quantity chilled in the internal surface of the U-shaped stainless steel tube of small volume, and by the iodine-131 of absorption being converted into Na in sig water frozen coating thaw process
131i solution, significantly improves the production capacity of production equipment and obtains Na
131the concentration of I solution product.The present invention does not need the TeO using quartz boat carrying activation
2raw material, but raw material is directly poured into process furnace distillation, do not have quartz boat class radioactive solid waste to produce, and automatically can collect distillation residue, TeO
2the larger raising of loading capacity of raw material, quantity of solid waste significantly reduces; Do not need to shut down cooling and change quartz boat, at continuous charging under not stopped status, per unit area yield energy and working efficiency can be improve more greatly; Adopt small volume sig water frozen coating adsorb iodine-131 steam but not pass through the sig water bubble absorption mode of comparatively large vol, significantly reduce sig water consumption and improve Na in product
131the concentration of I.And, produce high density Na in enormous quantities easily in the urgent need to compact construction, operational safety in reality
131the production equipment of I solution.
Horizontal high density Na of the present invention
131i production equipment can realize from the natural tellurium dioxide of reactor irradiation efficient (distillation efficiency is higher than 95%) and distill out radioactivity iodine-131, and overcoming existing water distilling apparatus per unit area yield can little, Na
131the concentration of I solution is low, working efficiency is lower, radioactive solid waste is many and inconvenient stock management, long period use after be deposited on TeO bottom horizontal quartz tube
2after cooling and quartz boat adhesion and affect the deficiencies such as problem such as the operation changing quartz boat, improve more greatly productive efficiency, alleviate the labour intensity of producers.Apparatus structure of the present invention is compact, is applicable to the high density Na in the less shielding work box in valid function space
131the destructive distillation of I solution product is produced, the stability of operation and security good.
Accompanying drawing explanation
Fig. 1 is the horizontal high density Na of one of the present invention
131the overall structure block diagram of I production equipment;
Fig. 2 is the structured flowchart of the water distilling apparatus in the present invention;
Fig. 3 is the structural representation of the distiller in the present invention;
Fig. 4 is the structural representation of the quartz glass muffle in the present invention;
Fig. 5 is the structured flowchart of the iodine-131 trap in the present invention;
Fig. 6 is the structural representation of the cold-trap in the present invention;
In figure: 1. moisture eliminator 2. water distilling apparatus 3. purifier 4. iodine-131 trap 5. exhaust purifier 6. vacuum pump 7. controller 8. stand 9. distiller 10 waste material bottle 11. lifting table 12. quartz glass muffle 13. opening for feed 14. inlet pipe 15. grinding port plug 16. claustra 17. discharge port 18. vapor pipe 19. process furnace 20. thermopair 21. bin stock ware 22. cold-trap 23. overflow groove 24. alkali lye bottle 25. well heater 26. nitrogengas cylinder 27. refrigerating fulid basin 28. product bottle 29.U shape pipe 30. freezing tank 31. active carbon adsorption column 32. upflow tube 33. two-way valve I 34. T-valve I 35. two-way valve II 36. T-valve II.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment 1
Fig. 1 is the horizontal high density Na of one of the present invention
131the overall structure block diagram of I production equipment, Fig. 2 is the structured flowchart of the water distilling apparatus in the present invention, Fig. 3 is the structural representation of the distiller in the present invention, Fig. 4 is the structural representation of the quartz glass muffle in the present invention, Fig. 5 is the structured flowchart of the iodine-131 trap in the present invention, and Fig. 6 is the structural representation of the cold-trap in the present invention.In Fig. 1 ~ Fig. 6, horizontal high density Na of the present invention
131i production equipment, comprise moisture eliminator 1, water distilling apparatus 2, purifier 3, iodine-131 trap 4, exhaust purifier 5, vacuum pump 6, controller 7, its annexation is, described moisture eliminator 1, water distilling apparatus 2, purifier 3, iodine-131 trap 4, exhaust purifier 5, vacuum pump 6 successively pipeline connect, and water distilling apparatus 2, purifier 3, iodine-131 trap 4 are electrically connected with controller 7 respectively.As shown in Figure 1.
Described water distilling apparatus 2 comprises stand 8, distiller 9, lifting table 11, and wherein, the distiller 9 in described water distilling apparatus 2 is the semicolumn bodily form, and its annexation is, described stand 8 is fixedly installed distiller 9, is provided with lifting table 11 below distiller 9.As shown in Figure 2.
Described distiller 9 comprises process furnace 19, quartz glass muffle 12, opening for feed 13, inlet pipe 14, discharge port 17, vapor pipe 18, quartz glass muffle 12 is provided with in described process furnace 19, one side of described quartz glass muffle 12 is provided with thermopair 20, vapor pipe 18 is fixedly installed in another side, the top of quartz glass muffle (12) one end is provided with opening for feed 13, the bottom of the other end is provided with discharge port 17.Described opening for feed 13 is provided with grinding port plug 15, is provided with inlet pipe 14 in grinding port plug 15, inlet pipe 14 is connected with purifier 3.Described vapor pipe 18 is connected with iodine-131 trap 4.The lower end of discharge port 17 is provided with waste material bottle 10, and waste material bottle 10 is placed on lifting table 11.Described lifting table 11, process furnace 19, thermopair 20 are connected with controller 7 respectively; An angle is provided with between the horizontal plane of process furnace 19 and stand 8.As shown in Figure 3.
The quartz glass muffle 12 of described distiller 9 is the quartz glass tube of the semicolumn bodily form, and the bin stock ware 21 that the baseplane in quartz glass muffle 12 chamber is arranged, claustra 16, discharge port 17 connect successively, and bin stock ware 21 is corresponding with opening for feed 13 to be arranged.As shown in Figure 4.
Described iodine-131 capturing device 4 comprises cold-trap 22, overflow groove 23, alkali lye bottle 24, well heater 25, nitrogengas cylinder 26, refrigerating fulid basin 27, product bottle 28, its annexation is, described cold-trap 22 is connected respectively with overflow groove 23, alkali lye bottle 24, well heater 25, refrigerating fulid basin 27, product bottle 28, alkali lye bottle 24, well heater 25, refrigerating fulid basin 27 are connected with nitrogengas cylinder 26 respectively, and cold-trap 22, product bottle 28 are connected with vacuum pump 6 respectively.Described well heater 25 is connected with controller 7.As shown in Figure 5.
Described cold-trap 22 comprises junctor U-shaped pipe 29, freezing tank 30, active carbon adsorption column 31, and its annexation is, a upper end of described U-shaped pipe 29 is connected with the upper end of active carbon adsorption column 31, and another upper end is connected with purifier 3.Described U-shaped pipe 29, the upper end of active carbon adsorption column 31 are placed in outside freezing tank 30 respectively, lower end to be placed in interior freezing tank 30 and respectively with freezing tank 30 by being welded to connect, the bottom of U-shaped pipe 29 is provided with T-valve I 34, and T-valve I 34 is connected respectively with alkali lye bottle 24, product bottle 28, U-shaped pipe 29.Described active carbon adsorption column 31 is provided with T-valve II 36, and T-valve II 36 is connected with exhaust purifier 5.
One side of the freezing tank 30 in described cold-trap 22 is provided with upflow tube 32, and upflow tube 32 is connected with overflow groove 23, and the two-way valve I 33 that freezing tank 30 is arranged by bottom, two-way valve II 35 are connected with refrigerating fulid basin 27, well heater 25 respectively.As shown in Figure 6.
In the present embodiment, between described process furnace 19 and the horizontal plane of stand 8, be provided with the angle of 10 degree.
Workflow of the present invention is as follows, in refrigerating fulid basin 27, add refrigerant (is the NaCl solution of 23% for cool the refrigerating fulid of U-shaped pipe 29 be the concentration being cooled to-10 DEG C ~-15 DEG C in advance, the freezing point of this solution is-20.68 DEG C), open the reducing valve on two-way valve I 33 and nitrogengas cylinder 26, refrigerating fulid being injected freezing tank 30 enters in overflow groove 23 to a small amount of refrigerating fulid from upflow tube 32, close two-way valve I 33 and reducing valve again, U-shaped pipe 29 and active carbon adsorption column 31 are cooled.In alkali lye bottle 24, adding appropriate sig water, (NaOH solution of 0.5mol/L, wherein containing a small amount of Na
2sO
3), close the connection of T-valve II 36 and vacuum pump 6, open the reducing valve on T-valve I 34 and nitrogengas cylinder 26, reducing valve is closed immediately after sig water being injected fast U-shaped pipe 29 to scale marks, allow the sig water in U-shaped pipe 29 flow back in alkali lye bottle 24 and close T-valve I 34, can a small amount of sig water is freezing be coated on U-shaped pipe 29 inwall, form the frozen coating being less than 0.5mm.According to the actual needs produced, the concentration of NaOH in the thickness of this frozen coating and frozen coating can be controlled by the sig water residence time and sig water concentration in U-shaped pipe 29.
Utilize the TeO that mechanical manipulator will be opened in target cylinder
2the bin stock ware 21 in quartz glass muffle 12 to be poured into by raw material from opening for feed 13 by a funnel, take off funnel and load onto grinding port plug 15, and open the connection of T-valve II 36 and vacuum pump 6, controller 7 controls process furnace 19 couples of TeO according to the heating schedule of setting
2heating raw materials, and keep about 60min at about 750 DEG C, the TeO of melting
2flow along the discharge port 17 that claustra 16 is slightly low to position lentamente from the bin stock ware 21 that position is slightly high, this flowing process in can make higher than 95% radioactivity iodine-131 from TeO
2distill in raw material, and under the carrier band of carrier gas (being generally air), be purified device 3 successively, iodine-131 trap 4, exhaust purifier 5 process, the tail gas after purification is by vacuum pump sucking-off and be emitted in work box or by special gas tank and collect.
Under the carrier band of dry air, flow through U-shaped pipe 29 from purifier out the iodine-131 steam of about 250 DEG C, be cooled rapidly higher than the iodine-131 of 98% on the surface being deposited on sig water frozen coating in carrier gas.When after the trapping completing iodine-131, close the connection of T-valve II 36 and vacuum pump 6, open two-way valve I 33 and allow the refrigerating fulid in freezing tank 30 flow back in refrigerating fulid basin 27 and close two-way valve I 33.Open the reducing valve of well heater 25 and nitrogengas cylinder 26, the nitrogen being heated to 50 DEG C ~ 80 DEG C is allowed to enter in the freezing tank 30 of emptying refrigerating fulid, slowly heat U-shaped pipe 29, frozen coating U-shaped pipe 29 inwall being adsorbed with a large amount of iodine-131 is heated and melts gradually, iodine-131 and NaOH and Na in thaw process
2sO
3reaction generates the good Na of solvability
131i, frozen coating becomes containing high density Na after melting
131the basic solution of I is also collected in the bottom of U-shaped pipe 29, opens the connection of T-valve I 34 and product bottle 28, by the vacuum pump 6 connected with product bottle 28 by high density Na
131the basic solution of I proceeds in product bottle 28.Again product bottle is taken out, through Na
131after the process such as the adjustment of I concentration adjustment, potential of hydrogen and filtration, sterilizing, namely obtain the medical grade Na of high density
131i solution product.
After having distilled, controller 7 instruction process furnace 19 stops heating, and process furnace 19 cavity temperature recorded at thermopair 20 lower than 200 DEG C after, control spacing the declines operation of lifting table 11, then utilize mechanical manipulator to be taken out by waste material bottle 10, cover lid and by other instrument transfer to specify place deposit.
According to the actual needs produced, can make the appropriate adjustments parameters such as the length of the obliquity of quartz glass muffle 12 in process furnace 19 and claustra 16 and height.When needing to collect distillation residue with discarded target cylinder, useless target cylinder can be placed on the central authorities in the waste material bottle 10 of wide-mouth, again waste material bottle 10 is arranged on discharge port 17 times, keeps the stopping property of quartz glass muffle 12, and the distillation residue of melting can load in the useless target cylinder that is in immediately below discharge port 17.
Embodiment 2
The present embodiment is identical with the structure of embodiment 1, and difference is, the angle between process furnace and the horizontal plane of stand is set to 20 degree.
Embodiment 3
The present embodiment is identical with the structure of embodiment 1, and difference is, the angle between process furnace and the horizontal plane of stand is set to 30 degree.
Claims (4)
1. a horizontal high density Na
131i production equipment, it is characterized in that: described production equipment comprises moisture eliminator (1), water distilling apparatus (2), purifier (3), iodine-131 trap (4), exhaust purifier (5), vacuum pump (6), controller (7), its annexation is, described moisture eliminator (1), water distilling apparatus (2), purifier (3), iodine-131 trap (4), exhaust purifier (5), vacuum pump (6) successively pipeline connect; Water distilling apparatus (2), purifier (3), iodine-131 trap (4) are electrically connected with controller (7) respectively;
Described water distilling apparatus (2) comprises stand (8), distiller (9), lifting table (11), and wherein, the distiller (9) in described water distilling apparatus (2) is the semicolumn bodily form; Its annexation is, described stand (8) is fixedly installed distiller (9), and distiller (9) below is provided with lifting table (11); Described distiller (9) comprises process furnace (19), quartz glass muffle (12), opening for feed (13), inlet pipe (14), discharge port (17), vapor pipe (18), quartz glass muffle (12) is provided with in described process furnace (19), one side of described quartz glass muffle (12) is provided with thermopair (20), is fixedly installed vapor pipe (18) in another side; The top of quartz glass muffle (12) one end is provided with opening for feed (13), is provided with discharge port (17) in the bottom of the other end; Described opening for feed (13) is provided with grinding port plug (15), is provided with inlet pipe (14) in grinding port plug (15), inlet pipe (14) is connected with purifier (3); Described vapor pipe (18) is connected with iodine-131 trap (4); The lower end of discharge port (17) is provided with waste material bottle (10), and waste material bottle (10) is placed on lifting table (11); Described lifting table (11), process furnace (19), thermopair (20) are connected with controller (7) respectively; An angle is provided with between the horizontal plane of process furnace (19) and stand (8);
The quartz glass tube that the quartz glass muffle (12) of described distiller (9) is the semicolumn bodily form, the bin stock ware (21) that the baseplane in quartz glass muffle (12) chamber is arranged, claustra (16), discharge port (17) connect successively; Bin stock ware (21) is corresponding with opening for feed (13) to be arranged;
Described iodine-131 trap (4) comprises cold-trap (22), overflow groove (23), alkali lye bottle (24), well heater (25), nitrogengas cylinder (26), refrigerating fulid basin (27), product bottle (28), its annexation is, described cold-trap (22) is connected respectively with overflow groove (23), alkali lye bottle (24), well heater (25), refrigerating fulid basin (27), product bottle (28); Alkali lye bottle (24), well heater (25), refrigerating fulid basin (27) are connected with nitrogengas cylinder (26) respectively; Cold-trap (22), product bottle (28) are connected with vacuum pump (6) respectively; Described well heater (25) is connected with controller (7).
2. production equipment according to claim 1, it is characterized in that: described cold-trap (22) comprises U-shaped pipe (29), freezing tank (30), active carbon adsorption column (31), its annexation is, one upper end of described U-shaped pipe (29) is connected with the upper end of active carbon adsorption column (31), and another upper end is connected with purifier (3); Described U-shaped pipe (29), the upper end of active carbon adsorption column (31) are placed in freezing tank (30) outward respectively, lower end to be placed in freezing tank (30) and respectively with freezing tank (30) by being welded to connect; The bottom of U-shaped pipe (29) is provided with T-valve I (34), and T-valve I (34) is connected respectively with alkali lye bottle (24), product bottle (28), U-shaped pipe (29); Described active carbon adsorption column (31) is provided with T-valve II (36), and T-valve II (36) is connected with exhaust purifier (5).
3. production equipment according to claim 2, is characterized in that: a side of the freezing tank (30) in described cold-trap (22) is provided with upflow tube (32), and upflow tube (32) is connected with overflow groove (23); The two-way valve I (33) that freezing tank (30) is arranged by bottom, two-way valve II (35) are connected with refrigerating fulid basin (27), well heater (25) respectively.
4. production equipment according to claim 1, is characterized in that: the angle arranged between described process furnace (19) and the horizontal plane of stand (8) is 10 degree ~ 30 degree.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510037480.3A CN104512913B (en) | 2015-01-26 | 2015-01-26 | A kind of horizontal high density Na 131i production equipment |
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| CN201510037480.3A CN104512913B (en) | 2015-01-26 | 2015-01-26 | A kind of horizontal high density Na 131i production equipment |
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| CN104512913A CN104512913A (en) | 2015-04-15 |
| CN104512913B true CN104512913B (en) | 2016-03-09 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108686608B (en) * | 2018-07-18 | 2023-06-27 | 中国工程物理研究院核物理与化学研究所 | Sleeve type I-131 dry distillation absorber |
| CN108686609B (en) * | 2018-07-18 | 2023-06-27 | 中国工程物理研究院核物理与化学研究所 | Quick cooling type Na 131 I dry distillation apparatus for producing |
| CN110694565B (en) * | 2019-10-29 | 2021-08-24 | 中国核动力研究设计院 | Production device for preparing radioactive iodine-131 by continuous feeding |
| CN116216644B (en) * | 2023-03-20 | 2023-09-22 | 四川大学 | Low-vacuum-degree high-purity At-211 carbonization production system and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2304653Y (en) * | 1998-02-25 | 1999-01-20 | 中国原子能科学研究院 | Dry distiller for producing radioactive iodine |
| GB0212850D0 (en) * | 2002-06-01 | 2002-07-17 | Accentus Plc | New recovery process |
| CN103771341B (en) * | 2013-12-23 | 2016-03-23 | 米度（南京）生物技术有限公司 | One prepares radioactivity 124the method of I ion |
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