CN108686607B - Horizontal Na 131 I dry distillation apparatus for producing - Google Patents
Horizontal Na 131 I dry distillation apparatus for producing Download PDFInfo
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- CN108686607B CN108686607B CN201810786975.XA CN201810786975A CN108686607B CN 108686607 B CN108686607 B CN 108686607B CN 201810786975 A CN201810786975 A CN 201810786975A CN 108686607 B CN108686607 B CN 108686607B
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Abstract
The invention discloses a horizontal Na 131 I dry distillation apparatus for producing, horizontal Na 131 I dry distillation apparatus for producing includes the horizontal Na 131 The carbonization production device comprises a heating furnace with a horizontal tube furnace structure, a furnace cover, a distillation absorber and a telescopic frame. Wherein, the heating furnace comprises a furnace sleeve I and a furnace sleeve II which are horizontally arranged and mutually and vertically connected into an L shape. The distillation absorber part is arranged in the heating furnace chamber, the furnace cover and the expansion bracket are arranged outside the port of the furnace sleeve I, one end of the expansion bracket is horizontally and fixedly arranged at the center of the top of the shell of the furnace sleeve I, and the other end of the expansion bracket is vertically and downwards connected with the furnace cover on the side of the heating furnace in a sliding manner. Horizontal Na of the invention 131 I dry distillation apparatus for producing can carry the area fast and high-efficient entrapment high temperature fusion heap illumination TeO 2 The distilled high-temperature I-131 vapor adopts a low-temperature region to purify the distilled carrier gas, thereby being more beneficial to improving Na 131 I production efficiency and production safety.
Description
Technical Field
The invention belongs to the technical field of radioisotope preparation, and in particular relates to a horizontal Na 131 I dry distillation production device.
Background
Na for producing radiopharmaceuticals 131 I raw material, teO after the reactor irradiation is mainly distilled at high temperature (about 750 ℃) 2 (tellurium dioxide) and absorbing the radioactive I-131 (iodine-131) vapor in a carrier gas (typically air) with a dilute alkaline solution (typically a NaOH solution having a concentration of less than 0.5 mol/L). The national institute of nuclear physics and chemistry of the national institute of engineering and physical and the national institute of atomic energy and power of China were at their Na 131 In the production process I, a vacuum pump is adopted to pump air, high-temperature carrier gas in the distillation furnace is directly led into the bottom of the absorption bottle to bubble through a pipeline, and iodine-131 vapor in the carrier gas is converted into Na by dilute alkali liquor in the bottle 131 I solution. However, the volume of the absorption liquid added into the absorption bottle is small (generally not more than 20 mL) due to the high temperature of the carrier gas, the temperature of the absorption liquid is easily and rapidly increased by the heat brought by the high temperature carrier gas, so that 'fog' appears at the upper part of the absorption bottle, and the fog is carried into the tail gas treatment device by the tail gas carrier gas, so that the absorption efficiency of the I-131 vapor in the carrier gas is low and the evaporation loss of the iodine-131-containing absorption liquid is caused, and the higher pressure is caused for the online treatment and standard emission of the tail gas. Reducing the carrier gas flow rate is beneficial to reducing the evaporation capacity of absorption liquid caused by heat exchange, but is not beneficial to preventing the loss of iodine-131 vapor in the gas guide tube due to the fact that the temperature loss is adsorbed by the tube wall, and is also not beneficial to timely carrying out a large amount of iodine-131 in the distillation tube, so that the production (distillation or heat preservation) time is prolonged, and the greater risk of leakage of iodine-131 vapor from a feed inlet exists, particularly when tellurium dioxide reaches a melting point. Due to domestic carbonization and irradiation of TeO 2 Production of Na 131 The device I adopts a vacuum pump to pump air, keeps carrier gas flowing directionally, keeps a certain negative pressure in a distillation furnace chamber to prevent iodine-131 steam leakage, and adds a small amount of dilute alkali liquor into an absorption bottle to obtain a product with higher radioactive concentration, so that the yield of the iodine-131 in the prior art is often lower than 90%, and the risk of the iodine-131 steam leakage polluting the environment is higher.Moreover, the distillation tube and the absorber in the prior art are split, and are connected by adopting a plastic tube or a rubber tube, so that the strong gamma radiation and high temperature of the radioactive iodine-131 in the carrier gas have a great influence on the service life of the connecting tube, and the radioactive iodine-131 steam leakage accident is caused by aging and cracking easily in practice, thereby shortening the service life of the production device, increasing the risk of more radiation doses received by maintenance staff and being unfavorable for safe production. The distillation tube and absorber integrated dry distillation absorber which has the high-efficiency cooling function on the alkali absorption liquid, is compact and small in structure and suitable for the production environment conditions in a hot chamber or a shielding working box is adopted, and is a main way for solving the defects of the prior art.
Disclosure of Invention
To improve Na 131 The production efficiency of the solution I reduces the safety risk, and the invention provides a horizontal Na 131 I dry distillation production device.
Horizontal Na of the invention 131 I dry distillation apparatus for producing adopts circulating water cooling mode to cool and distill the high temperature carrier gas in the air duct and the absorption liquid in the absorption bottle and the integrated structure of tube, sleeve pipe and absorber, carries out the heat that the high temperature carrier gas that flows fast brought into the absorption bottle fast, keeps the absorption liquid not heated the intensification or intensification is unobvious in whole production process for this device can carry fast and high-efficient entrapment and distill out high temperature radioactive iodine-131 steam from the tellurium dioxide raw materials of reactor activation, makes iodine-131's yield more than 98%, prolongs apparatus for producing life and effectively reduces the safe risk of production.
The technical scheme for realizing the invention is as follows:
the invention relates to a horizontal Na 131 I dry distillation apparatus for producing, its characteristic is, horizontal Na 131 The carbonization production device comprises a heating furnace with a horizontal tubular furnace structure, a furnace cover, a distillation absorber and a telescopic frame. Wherein, the heating furnace comprises a furnace sleeve I and a furnace sleeve II which are horizontally arranged and mutually and vertically connected into an L shape. The connection relation of the dry distillation production device is that the distillation absorber part is arranged in the heating furnace chamber, the furnace cover and the expansion bracket are arranged in the furnace sleeve IOutside the port, one end of the expansion bracket is horizontally and fixedly arranged at the center of the top of the shell of the furnace sleeve I, and the other end of the expansion bracket is vertically and downwards connected with the furnace cover positioned at the side of the heating furnace in a sliding manner.
The bottom of the furnace sleeve I is provided with a thermocouple I, and the bottom of the furnace sleeve II is provided with a thermocouple II; a locking column which is vertically and fixedly connected with the shell is horizontally arranged on the middle shell of the furnace sleeve I. The furnace cover comprises a cover plate, a clamp, a spring, a hook and a plug, wherein the cover plate, the spring, the clamp and the plug are sequentially arranged from left to right. The hooks are arranged at the top of the cover plate and are in sliding connection with the cover plate, the clamp is fixedly connected with one side of the cover plate, the neck of the plug is arranged in the clamp, and the springs are arranged between the cover plate and the plug and respectively contact with the top of the cover plate and the top of the plug; the center of the top of the plug is provided with a groove, a dust filtering fiber rod is arranged in the groove, and a through hole is arranged at the bottom of the groove; the top of the cover plate is in sliding connection with the lower end of the telescopic frame.
The distillation absorber comprises a distillation tube, a coil pipe and an absorption tank, wherein the distillation tube, the coil pipe and the absorption tank are horizontally arranged, the absorption tank comprises an alkali solution tank, a water bath tank and an exhaust pipe, the distillation tube is arranged in a furnace sleeve I, the coil pipe is partially arranged in a furnace sleeve II, the absorption tank is arranged outside a port of the furnace sleeve II, one end of the distillation tube is communicated with one end of the coil pipe and is mutually and vertically arranged, and the other end of the coil pipe vertically penetrates into the upper part of the alkali solution tank and is fixedly connected with the alkali solution tank in a sealing way; the other end of the distillation tube is a horn mouth, two parallel rails are symmetrically arranged on the inner wall of the middle lower part of the distillation tube, and a quartz boat is arranged on the rails. The center of the top, the side and the bottom of the alkali liquor tank are respectively fixedly provided with a feeding pipe, a three-way valve and a two-way valve, and a steel wire mesh is arranged in the alkali liquor tank; the water bath tank is characterized in that a water inlet pipe and an L-shaped water drain pipe are horizontally and fixedly arranged at the middle lower part of the water bath tank side by side, and an upper port of the water drain pipe is arranged in the water bath tank and is in a gap with the top of the water bath tank.
The furnace sleeve I, the furnace sleeve II, the thermocouple I and the thermocouple II are externally connected with a controller; one branch pipe of the three-way valve is sequentially connected with a tail gas treatment device and a vacuum pump, and the other branch pipe is connected with a duplex ball; the water inlet pipe and the water outlet pipe are externally connected with a circulating cooling water device; the feeding pipe is sequentially externally connected with a peristaltic pump and a storage bottle.
The horizontal axis of the distillation tube and the horizontal axis of the coil are arranged in a vertical crossing way, and the horizontal axis of the coil and the longitudinal axis of the alkali liquid tank are arranged in a crossing way; the longitudinal axis lines of the alkali liquid tank, the water bath tank and the exhaust pipe are arranged in a superposition way; the plug is matched with the horn mouth of the distillation tube; the locking column is matched with the hook.
The distillation absorber is made of quartz glass; the steel wire mesh is made of stainless steel.
Horizontal Na of the invention 131 The brief working principle of the carbonization production device is as follows: piling up TeO in distillation tube of furnace jacket I under vacuum pump 2 The high-temperature iodine-131 vapor which is heated to about 750 ℃ and overflows in a melting way is carried by a carrier gas from a distillation tube, is sent to the bottom of an alkali liquor tank to bubble through a coil pipe which is arranged in a furnace sleeve II and is heated to about 300 ℃ and an exhaust pipe which is arranged in the alkali liquor tank, the carrier gas is purified in the coil pipe 4, and the heat which is exchanged by the carrier gas in contact with the alkali liquor and the heat released by disproportionation reaction of I-131 and alkali are quickly carried away by cold water in the water bath tank through heat exchange of the tube wall, so that the temperature of an absorption liquid is kept at normal temperature or the temperature rising range is smaller in the whole production process. The heating power supply is turned off after the distillation is finished, so that the temperature of the distillation tube and the distillation residues in the distillation tube is quickly reduced to a specified value. Then the iodine-131 condensed on the inner wall of the exhaust pipe is soaked and eluted by the duplex ball back pressure absorption liquid, thereby realizing the efficient absorption and Na of the iodine-131 vapor in the high-temperature carrier gas 131 And the solution I is produced efficiently and safely.
Horizontal Na of the invention 131 The dry distillation production device adopts a heating furnace with a double-temperature-area structure and an absorption tank with a water cooling function, firstly, carrier gas is purified in a coil pipe in a low-temperature area, then, the heat of the absorption liquid in an alkali liquid tank and the heat of disproportionation reaction are transferred to the carrier gas, so that the carrier gas is furthest taken away, under the condition of keeping a certain flow rate of cooling water, the heating of the high-temperature carrier gas on the small-volume absorption liquid at a higher flow rate (or a larger flow rate) is not obvious, and the iodine-131 loss caused by the generation of 'fog' is prevented or furthest reduced; dipping in the alkali liquid tankThe dense steel wire gauze in the absorption liquid divides larger carrier gas bubbles to increase the contact area with the absorption liquid and increase the contact time (increase the bubble moving distance), thereby effectively ensuring the absorption efficiency of I-131 vapor in the carrier gas with higher flow rate. Horizontal Na of the invention 131 The I dry distillation production device has compact and small structure and good safety and reliability.
Drawings
FIG. 1 is a horizontal Na of the present invention 131 I, a top view structural schematic diagram of a carbonization production device;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a sectional view B-B of FIG. 1;
FIG. 4 is a cross-sectional view of C-C of FIG. 2;
in the figure, furnace jacket I2, furnace jacket II 3, distillation pipe 4, coil pipe 5, alkali liquid tank 6, water bath 7, exhaust pipe 8, plug 9, wire mesh 10, three-way valve 11, two-way valve 12, locking column 13, feed pipe 14, water inlet pipe 15, drain pipe 16, expansion bracket 17, cover plate 18, clip 19, spring 20, hook 21, rail 22, quartz boat 23, thermocouple I24, thermocouple II.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Example 1
FIG. 1 is a horizontal Na of the present invention 131 I A schematic top view of a dry distillation production apparatus, FIG. 2 is a sectional view of A-A in FIG. 1, FIG. 3 is a sectional view of B-B in FIG. 1, and FIG. 4 is a sectional view of C-C in FIG. 2. In FIGS. 1 to 4, the horizontal Na of the present invention 131 The carbonization production device comprises a heating furnace with a horizontal tube furnace structure, a furnace cover, a distillation absorber and a telescopic frame 16. Wherein, the heating furnace comprises a furnace sleeve I1 and a furnace sleeve II 2 which are horizontally arranged and mutually and vertically connected into an L shape. The connection relation of the dry distillation production device is that the distillation absorber is partially arranged in the heating furnace chamber, the furnace cover and the expansion bracket 16 are jointly arranged outside the port of the furnace sleeve I1, one end of the expansion bracket 16 is horizontally and fixedly arranged at the center of the top of the shell of the furnace sleeve I1, and the other end of the expansion bracket 16 is vertically and downwards connected with the furnace cover positioned at the side of the heating furnace in a sliding manner. The bottom of the furnace sleeve I1 is provided with a thermocouple I23, and the bottom of the furnace sleeve II 2 is provided with a thermocoupleII 24. A locking column 12 which is vertically and fixedly connected with the shell is horizontally arranged on the middle shell of the furnace sleeve I1. The furnace cover comprises a cover plate 17, a clamp 18, a spring 19, a hook 20 and a plug 8, wherein the cover plate 17, the spring 19, the clamp 18 and the plug 8 are sequentially arranged from left to right. The hook 20 is arranged at the top of the cover plate 17 and is in sliding connection with the cover plate 17, the clamp 18 is fixedly connected with one side of the cover plate 17, the neck of the plug 8 is arranged in the clamp 18, and the spring 19 is arranged between the cover plate 17 and the plug 8 and is respectively contacted with the top of the cover plate 17 and the top of the plug 8. The center of the top of the plug 8 is provided with a groove, a dust filtering fiber rod is arranged in the groove, and a through hole is arranged at the bottom of the groove and used for introducing air; the top of the cover plate 17 is connected with the lower end of the telescopic frame 16 in a sliding way.
The distillation absorber include distillation tube 3, coil pipe 4 and the vertical absorption tank that sets up of level, the absorption tank include alkali solution jar 5, water bath 6, blast pipe 7, in furnace jacket I1 is arranged in to distillation tube 3, in furnace jacket II 2 is arranged in to coil pipe 4 part, the absorption tank setting is outside furnace jacket II 2 port, the one end intercommunication of distillation tube 3 and the one end intercommunication of coil pipe 4 are each other for perpendicular setting, the other end of coil pipe 4 penetrates alkali solution jar 5 upper portion perpendicularly and with alkali solution jar 5 leakproofness fixed connection. The other end of the distillation tube 3 is a horn mouth, two parallel rails 21 are symmetrically arranged on the inner wall of the middle lower part of the distillation tube 3, and a quartz boat 22 is arranged on the rails 21. The center of the top, the side and the bottom of the alkali liquor tank 5 are respectively and fixedly provided with a feeding pipe 13, a three-way valve 10 and a two-way valve 11, and a steel wire mesh 9 is arranged in the alkali liquor tank 5. The water bath tank 6 is characterized in that a water inlet pipe 14 and an L-shaped water outlet pipe 15 are horizontally and fixedly arranged at the middle lower part of the water bath tank 6 side by side, and an upper port of the water outlet pipe 15 is arranged in the water bath tank 6 and is in a gap with the top of the water bath tank 6.
The furnace sleeve I1, the furnace sleeve II 2, the thermocouple I23 and the thermocouple II 24 are externally connected with a controller; one branch pipe of the three-way valve 10 is sequentially connected with an exhaust gas treatment device and a vacuum pump, and the other branch pipe is connected with a bigeminal ball. The water inlet pipe 14 and the water outlet pipe 15 are externally connected with a circulating cooling water device. The feeding pipe 13 is sequentially externally connected with a peristaltic pump and a storage bottle. The horizontal axis lines of the distillation tube 3 and the coil 4 are arranged in a vertical crossing way, and the horizontal axis line of the coil 4 is arranged in a crossing way with the longitudinal axis line of the alkali liquid tank 5. The longitudinal axis lines of the alkali liquid tank 5, the water bath tank 6 and the exhaust pipe 7 are arranged in a superposition mode. The plug 8 is matched with the horn mouth of the distillation tube 3. The locking post 12 is matched with the hook 20. The distillation absorber is made of quartz glass. The steel wire mesh 9 is made of stainless steel. As shown in fig. 1 to 4.
In this embodiment, the distillation tube 3 is entirely disposed in the furnace jacket I1, the coil 4 is partially disposed in the furnace jacket II 2, and the stack TeO disposed in the quartz boat 22 of the distillation tube 3 is heated by the furnace jacket I1 2 To about 750 ℃ and heating coil 4 of furnace jacket ii 2 to about 300 ℃, the carrier gas will be from TeO 2 The distilled iodine-131 vapor is purified by coil 4 and then loaded into an absorption tank. The three-way valve 10 is connected with a two-way ball outside one branch pipe of the three-way valve 10 on the alkali liquor tank 5, is used for pressurizing the absorption liquid in the alkali liquor tank 5 to soak and elute the iodine-131 condensed on the inner wall of the exhaust pipe 7 from bottom to top, is favorable for reducing the adsorption loss of the iodine-131, and the other branch pipe of the three-way valve 10 is connected with a tail gas treatment device and a vacuum pump in sequence, and utilizes the vacuum pump to drive carrier gas to directionally flow through the exhaust pipe 7, the alkali liquor tank 5 and the tail gas treatment device so as to treat the high-temperature carrier gas. The feeding pipe 13 is externally connected with a peristaltic pump, and absorbing liquid is quantitatively added into the alkali liquor tank 5 by using the peristaltic pump. The water inlet pipe 14 and the water outlet pipe 15 are externally connected with a circulating cooling water device, so that the cooling water in the water bath tank 6 can flow from bottom to top rapidly to take away the heat transfer of the high-temperature carrier gas to the absorption liquid.
In this embodiment, the number of the tracks is two, and the number of the tracks 21 is one. The number of the locking columns is two, and the number of the locking columns 12 is one.
The working flow of the invention is that a specially configured material carrying table is placed near the mouth of a distillation tube 3 by a manipulator configured by a hot chamber or a working box, a quartz boat 22 is placed on the material carrying table, and the irradiated TeO is poured 2 And (3) target materials, then pushing the quartz boat 22 into the distillation tube 3 completely, adjusting the furnace cover position to enable the plug 8 to be aligned with the bell mouth of the distillation tube 3, spinning the hooks 20 to the direction of the heating furnace to be fastened with the locking columns 12, and sending the plug 8 into the bell mouth of the distillation tube 3 and plugging. Opening the valveThe peristaltic pump injects a certain amount of absorption liquid into the alkali liquid tank 5 through the feeding pipe 13, then the circulating cooling water device is opened, cooling water is injected from the bottom of the water bath tank 6 through the water inlet pipe 14, and is discharged from the top of the water bath tank 6 through the water outlet pipe 15, so that the absorption liquid is cooled. The three-way valve 10, the vacuum pump and the external controller of the heating furnace are sequentially opened, the flow rate of carrier gas is regulated through the three-way valve 10, and the stack TeO arranged in the quartz boat 22 in the distillation tube 3 is irradiated 2 The target material is heated to about 750 ℃ and kept at a constant temperature for about 40 minutes, the carrier gas feeds iodine-131 vapor distilled from the target material to the bottom of the alkali liquid tank 5 to bubble through the coil pipe 4 and the exhaust pipe 7 which are heated to about 300 ℃ in sequence, the carrier gas is purified in the coil pipe 4, the carrier gas is contacted with the absorption liquid in the alkali liquid tank 5 and passes through the steel wire mesh 9 immersed in the absorption liquid upwards from the bottom of the alkali liquid tank 5, and then the heat exchanged to the absorption liquid in the process of discharging from the three-way valve 10, and the reaction heat of I-131 and alkali in the carrier gas are quickly taken away by cold water in the water bath tank 6 through heat exchange, so that the temperature of the absorption liquid is kept at normal temperature or the temperature rise range is small in the whole production process. After the distillation is finished, the heating power supply is turned off, the furnace body, the distillation tube 3 and the distillation residues in the quartz boat 22 are naturally cooled, the thermocouple I23 detects that the temperature of the distillation tube 3 is lower than 150 ℃ (preferably close to room temperature), the three-way valve 10 is turned off, the communication between the three-way valve 10 and the tail gas treatment device is turned on, the branch pipe connected with the bigeminal ball is connected, the bigeminal ball back pressure absorption liquid is used for soaking and eluting iodine-131 condensed on the inner wall of the exhaust pipe 7 from bottom to top, the bigeminal ball pressure is removed, and the soaking eluent flows back to the alkali liquid tank 5 to be mixed with the residual absorption liquid at the bottom. Then the two-way valve 11 is opened to put the absorption liquid in the alkali liquor tank 5 into a special glass bottle and transfer to a designated place. The hooks 20 are rotated again to release the connection with the locking posts 12 and the furnace lid is pushed away from the furnace, the quartz boat 22 containing the distillation residues is removed and disposed of properly, and then the furnace lid is closed again. Up to this point, realize heap illumination TeO 2 Dry distillation Na production 131 And the solution I is produced efficiently and safely.
Claims (4)
1. Horizontal Na 131 I dry distillation apparatus for producing, its characterized in that: the horizontal Na 131 The I dry distillation production device comprises a heating furnace, a furnace cover and a steam furnace with a horizontal tubular furnace structureA distillation absorber and a telescopic frame (16); wherein, the heating furnace comprises a furnace sleeve I (1) and a furnace sleeve II (2) which are horizontally arranged and mutually and vertically connected into an L shape; the connection relation of the dry distillation production device is that the distillation absorber part is arranged in the heating furnace chamber, the furnace cover and the expansion bracket (16) are arranged outside the port of the furnace sleeve I (1), one end of the expansion bracket (16) is horizontally and fixedly arranged at the center of the top of the shell of the furnace sleeve I (1), and the other end of the expansion bracket (16) is vertically and downwards connected with the furnace cover at the side of the heating furnace in a sliding way;
the bottom of the furnace sleeve I (1) is provided with a thermocouple I (23), and the bottom of the furnace sleeve II (2) is provided with a thermocouple II (24); a locking column (12) which is vertically and fixedly connected with the shell is horizontally arranged on the middle shell of the furnace sleeve I (1); the furnace cover comprises a cover plate (17), a clamp (18), a spring (19), a hook (20) and a plug (8), wherein the cover plate (17), the spring (19), the clamp (18) and the plug (8) are sequentially arranged from left to right; the hook (20) is arranged at the top of the cover plate (17) and is in sliding connection with the cover plate (17), the clamp (18) is fixedly connected with one side of the cover plate (17), the neck of the plug (8) is arranged in the clamp (18), and the spring (19) is arranged between the cover plate (17) and the plug (8) and is respectively contacted with the tops of the cover plate (17) and the plug (8); the center of the top of the plug (8) is provided with a groove, a dust filtering fiber rod is arranged in the groove, and a through hole is arranged at the bottom of the groove; the top of the cover plate (17) is in sliding connection with the lower end vertical to the telescopic frame (16);
the distillation absorber comprises a distillation tube (3), a coil (4) and an absorption tank, wherein the distillation tube (3), the coil (4) and the absorption tank are horizontally arranged, the absorption tank comprises an alkali solution tank (5), a water bath tank (6) and an exhaust pipe (7), the distillation tube (3) is arranged in a furnace jacket I (1), a coil (4) is partially arranged in a furnace jacket II (2), the absorption tank is arranged outside a port of the furnace jacket II (2), one end of the distillation tube (3) is communicated with one end of the coil (4) and is vertically arranged with each other, and the other end of the coil (4) vertically penetrates into the upper part of the alkali solution tank (5) and is fixedly connected with the alkali solution tank (5) in a sealing manner; the other end of the distillation tube (3) is a bell mouth, two parallel rails (21) are symmetrically arranged on the inner wall of the middle lower part of the distillation tube (3), and a quartz boat (22) is arranged on the rails (21); the center of the top, the side and the bottom of the alkali liquor tank (5) are respectively and fixedly provided with a feeding pipe (13), a three-way valve (10) and a two-way valve (11), and a steel wire mesh (9) is arranged in the alkali liquor tank (5); the water bath tank is characterized in that a water inlet pipe (14) and an L-shaped water drain pipe (15) are horizontally and fixedly arranged at the middle lower part of the water bath tank (6) side by side, and an upper port of the water drain pipe (15) is arranged in the water bath tank (6) and is in a gap with the top of the water bath tank (6).
2. A horizontal Na according to claim 1 131 I dry distillation apparatus for producing, its characterized in that: the furnace jacket I (1), the furnace jacket II (2), the thermocouple I (23) and the thermocouple II (24) are externally connected with a controller; one branch pipe of the three-way valve (10) is sequentially connected with a tail gas treatment device and a vacuum pump, and the other branch pipe is connected with a duplex ball; the water inlet pipe (14) and the water outlet pipe (15) are externally connected with a circulating cooling water device; the feeding pipe (13) is sequentially externally connected with a peristaltic pump and a storage bottle.
3. A horizontal Na according to claim 1 131 I dry distillation apparatus for producing, its characterized in that: the horizontal axes of the distillation tube (3) and the coil (4) are arranged in a vertical crossing way, and the horizontal axis of the coil (4) is arranged in a crossing way with the longitudinal axis of the alkali liquor tank (5); the longitudinal axis lines of the alkali liquor tank (5), the water bath tank (6) and the exhaust pipe (7) are arranged in a superposition way; the plug (8) is matched with the horn mouth of the distillation tube (3); the locking column (12) is matched with the hook (20).
4. A horizontal Na according to claim 1 131 I dry distillation apparatus for producing, its characterized in that: the distillation absorber is made of quartz glass; the steel wire mesh (9) is made of stainless steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810786975.XA CN108686607B (en) | 2018-07-18 | 2018-07-18 | Horizontal Na 131 I dry distillation apparatus for producing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810786975.XA CN108686607B (en) | 2018-07-18 | 2018-07-18 | Horizontal Na 131 I dry distillation apparatus for producing |
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| CN108686607A CN108686607A (en) | 2018-10-23 |
| CN108686607B true CN108686607B (en) | 2023-06-16 |
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| CN109727693B (en) * | 2019-01-08 | 2022-09-23 | 中国工程物理研究院核物理与化学研究所 | Connector for I-131 absorption bottle |
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