CN115945035A - I-131 dry distillation absorber driven by compressed air - Google Patents
I-131 dry distillation absorber driven by compressed air Download PDFInfo
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- CN115945035A CN115945035A CN202211741673.3A CN202211741673A CN115945035A CN 115945035 A CN115945035 A CN 115945035A CN 202211741673 A CN202211741673 A CN 202211741673A CN 115945035 A CN115945035 A CN 115945035A
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 21
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 20
- 238000004821 distillation Methods 0.000 claims abstract description 51
- 238000010521 absorption reaction Methods 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 239000003513 alkali Substances 0.000 claims description 54
- 238000001816 cooling Methods 0.000 claims description 28
- 238000009413 insulation Methods 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000498 cooling water Substances 0.000 claims description 4
- 230000002572 peristaltic effect Effects 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010425 asbestos Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- PNDPGZBMCMUPRI-HVTJNCQCSA-N 10043-66-0 Chemical compound [131I][131I] PNDPGZBMCMUPRI-HVTJNCQCSA-N 0.000 abstract description 20
- 230000002285 radioactive effect Effects 0.000 abstract description 13
- 239000007789 gas Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000012159 carrier gas Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 4
- 239000002901 radioactive waste Substances 0.000 abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000013077 target material Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005658 nuclear physics Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- LAJZODKXOMJMPK-UHFFFAOYSA-N tellurium dioxide Chemical compound O=[Te]=O LAJZODKXOMJMPK-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses an I-131 dry distillation absorber driven by compressed air, which comprises a distillation tube, an absorption bottle, an air pump and a heat conduction tube with a circular coil structure. The distillation tube is horizontally arranged, the heat conduction pipe is arranged at the bottom in the distillation tube, the absorption bottle is arranged right below the position close to the bottom of the distillation tube, and the air pump is arranged on the side surface of the absorption bottle; the top of the absorption bottle penetrates into the distillation tube and is fixedly connected with the distillation tube in a sealing manner, the two ends of the heat conduction tube penetrate out of the bottom of the distillation tube respectively, penetrate into the top of the absorption bottle and are fixedly connected with the distillation tube and the sealing of the absorption bottle, and the air pump is fixedly connected with the absorption bottle. The dry distillation absorber adopts a compressed air drive to replace a vacuum pump and a heating mode of high-temperature gas to transport carrier gas in the whole process, realizes the high-efficiency absorption of the airborne radioactive iodine-131, and eliminates the defects of vacuum pump failure and generation of pump-related radioactive waste to the safety production.
Description
Technical Field
The invention belongs to the technical field of radioisotope preparation, and particularly relates to an I-131 dry distillation absorber driven by compressed air.
Background
The radioactive raw materials of sodium iodide (131I-NaI) medicines and iodine-131 labeled medicines used by medical institutions mainly come from tellurium dioxide activated by reactor irradiation and are mainly produced by a dry distillation method. Except for the nuclear physics and chemical research institute of the institute of engineering physics of China, the unit provided by the invention, domestic China atomic energy science research institute and China nuclear power research institute have been engaged in iodine-131 dry distillation production and have established production devices. However, in the existing production technology, the iodine-131 distilled from the target material is easy to deposit or stay on the inner wall of the pipeline in the carrier gas carrying and transporting process, and particularly, the problems of low product yield, long production time and the like are caused at the exposed pipeline connected with the absorption bottle and the lower temperature of the pipeline, so that the production benefit is not improved, and the vacuum pump used in the production needs to be regularly maintained or replaced, so that the radiation dose of workers and the generation of radioactive wastes related to the replacement of the waste vacuum pump or the maintenance of the waste vacuum pump are inevitably increased. At present, no public report of a compressed air driven I-131 dry distillation absorber exists in the technical field of medical radioactive iodine-131.
Disclosure of Invention
In order to overcome the defects that iodine-131 distilled from a target material is easy to deposit or stay on the inner wall of a pipeline in the carrier gas carrying and transporting process in the prior art, so that the product yield is low, the production time is long, the radiation risk of workers is increased, and the aim of further improving the production benefit can be fulfilled.
The technical scheme for realizing the invention is as follows:
the invention relates to an I-131 dry distillation absorber driven by compressed air, which is characterized in that the I-131 dry distillation absorber driven by the compressed air comprises a distillation tube, an absorption bottle, an air pump and a heat conduction tube with a circular coil structure, wherein the distillation tube is horizontally arranged, the heat conduction tube is arranged at the bottom in the distillation tube, the absorption bottle is arranged right below the position close to the bottom of the distillation tube, and the air pump is arranged on the side surface of the absorption bottle; the top of the absorption bottle penetrates into the distillation tube and is fixedly connected with the distillation tube in a sealing manner, the two ends of the heat conduction tube penetrate out of the bottom of the distillation tube respectively, penetrate into the top of the absorption bottle and are fixedly connected with the distillation tube and the sealing of the absorption bottle, and the air pump is fixedly connected with the absorption bottle.
The absorption bottle comprises an air pipe, an air heating sleeve, a heat insulation sleeve, an alkali liquor bottle, a water cooling taper sleeve, a temperature measuring sleeve, a feeding pipe, a communicating pipe and a U-shaped pipe; the air pipe, the air heating sleeve, the heat insulation sleeve and the alkali liquor bottle are sequentially vertically arranged from inside to outside, wherein the upper end of the air pipe is conical, the lower end of the air pipe is a horn mouth, the air heating sleeve is cylindrical, the heat insulation sleeve is double-layer cylindrical with a round hole in the center of the bottom, the alkali liquor bottle is cylindrical with a top closed, and the water cooling taper sleeve is of a conical coil structure; the air pipe penetrates through the air heating sleeve and is fixedly connected with two ends of the air heating sleeve in a sealing manner, a horn mouth at the lower end of the air pipe is embedded into a round hole of the heat insulation sleeve and is fixedly connected with the round hole surface in a sealing manner, the upper end surface of the alkali liquor bottle is fixedly connected with the outer side surface of the upper part of the heat insulation sleeve in a sealing manner, and a gap is formed between the alkali liquor bottle and the bottom of the heat insulation sleeve; the water-cooling taper sleeve is arranged between the bell mouth of the vent pipe and the bottom of the alkali liquor bottle, the water-cooling taper sleeve is positioned in the bell mouth and keeps a small gap with the inner surface of the bell mouth, and a water inlet and outlet pipe at the lower end of the water-cooling taper sleeve downwards penetrates through the bottom of the alkali liquor bottle and is fixedly connected with the sealing property of the alkali liquor bottle; the temperature measuring sleeve vertically and upwards sequentially penetrates through the bottom of the alkali liquor bottle and the center of the water-cooling taper sleeve and extends into the straight pipe at the lower part of the vent pipe, the temperature measuring sleeve is fixedly connected with the bottom of the alkali liquor bottle in a sealing manner, and a thermocouple is arranged in the temperature measuring sleeve; the feeding pipe and the communicating pipe are respectively and fixedly arranged on two sides of the upper part of the alkali liquor bottle, and two ends of the communicating pipe respectively penetrate into the alkali liquor bottle and the air pump and are fixedly connected with the alkali liquor bottle and the air pump in a sealing manner; the U-shaped pipe is arranged on the upper side face of the air heating sleeve, and two ends of the U-shaped pipe respectively penetrate through the alkali liquor bottle and the air pump and are fixedly connected with the alkali liquor bottle and the air pump in a sealing manner;
a plug matched with a grinding opening is arranged at the opening end of the distillation tube;
the thermocouple is externally connected with a controller; the feed pipe is externally connected with a peristaltic pump; the water-cooling taper sleeve is externally connected with a circulating cooling water pump; the heat conduction pipe is externally connected with a compressed air source.
Preferably, the longitudinal axes of the vent pipe, the gas heating sleeve, the heat insulation sleeve, the alkali liquor bottle and the branch pipe are superposed and vertically crossed with the horizontal axis of the distillation pipe.
Preferably, the distillation tube, the air pump, the vent pipe, the air heating sleeve, the heat insulation sleeve, the alkali liquor bottle, the water cooling taper sleeve, the temperature measuring sleeve, the feeding tube, the communicating tube, the U-shaped tube, the plug and the heat conducting tube are all made of quartz glass; the heat insulation sleeve is filled with asbestos fiber or vacuumized.
Preferably, the U-shaped tube (12) extends inside the gas heating jacket tube (4) up to the bottom of the gas heating jacket tube (4).
The invention relates to an I-131 dry distillation absorber driven by compressed air, which adopts the method that negative pressure generated by the rapid injection of the compressed air in an air pump drives airborne radioactive iodine-131 to be transported from a distillation tube to an absorption bottle, and high-temperature gas heating and heat preservation are carried out on an airborne iodine-131 transportation pipeline, so that the high-efficiency absorption of the airborne radioactive iodine-131 distilled from a furnace tube is realized, and the simple working principle is as follows: compressed air is input into the distillation absorber from the heat conduction pipe and is exhausted from the air pump, and the air heated to high temperature in the heat conduction pipe continuously heats and insulates the heat of the vent pipe when flowing through the air heating sleeve so as to keep the temperature of carrier gas containing radioactive iodine-131 in the vent pipe to be kept over 200 ℃ in the transportation process, thereby reducing the deposition or the detention of the iodine-131 on the inner wall of the transportation pipeline; the compressed air is quickly ejected out of the air pump to generate higher negative pressure in an inner cavity of the pump and is transmitted into the distillation tube through the communicating tube, the alkali liquor bottle and the vent tube in sequence, the negative pressure drives radioactive iodine-131 gas generated in the distillation tube to enter the alkali liquor bottle through the vent tube under the carrying of carrier gas, the high-temperature carrier gas is quickly cooled by the water-cooling taper sleeve arranged in the bell mouth of the vent tube, meanwhile, the airborne radioactive iodine-131 gas is absorbed by absorption liquid (generally dilute sodium hydroxide solution) filled in the alkali liquor bottle, and tail gas is discharged from the air pump through the communicating tube, so that the efficient absorption of the airborne radioactive iodine-131 is realized.
The I-131 dry distillation absorber driven by compressed air adopts a vertical structural layout, overcomes the defects that the connecting pipeline is long, the pipeline needs to be bent at multiple positions and the whole-process heat preservation of carrier gas transportation cannot be realized in the prior art, thoroughly eliminates the defect that a vacuum pump used in the prior art needs to be maintained or replaced at regular intervals, can avoid increasing the radiation dose of workers and avoiding the adverse factors such as radioactive waste generation and disposal related to the replacement of waste vacuum pumps or the maintenance of waste vacuum pumps, greatly improves the production efficiency, and has good operation stability and safety.
Drawings
FIG. 1 is a schematic diagram of the construction of a compressed air driven I-131 destructive distillation absorber of the present invention;
in the figure:
1. a distillation tube; 2. an air pump; 3. a breather pipe; 4. a gas heated sleeve; 5. a heat insulating sleeve; 6. an alkaline solution bottle; 7. water-cooling taper sleeves; 8. a temperature measuring sleeve; 9. a feed tube; 10. a communicating pipe; 11. a thermocouple; 12.U-shaped tube; 13. a plug; 14. a heat conducting pipe.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creating any labor.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
Example 1
FIG. 1 is a schematic diagram of the construction of a compressed air driven I-131 destructive distillation absorber of the present invention. In fig. 1, the compressed air-driven I-131 dry distillation absorber of the present invention comprises a distillation tube 1, an absorption bottle, an air pump 2 and a heat conduction tube 14 with a circular coil structure, wherein the distillation tube 1 is horizontally arranged, the heat conduction tube 14 is arranged at the bottom of the distillation tube 1, the absorption bottle is arranged right below the bottom of the distillation tube 1, and the air pump 2 is arranged at the side of the absorption bottle; the top of the absorption bottle penetrates into the distillation tube 1 and is fixedly connected with the distillation tube 1 in a sealing manner, two ends of the heat conduction tube 14 respectively penetrate through the bottom of the distillation tube 1 and penetrate into the top of the absorption bottle and are fixedly connected with the distillation tube 1 and the absorption bottle in a sealing manner, and the air pump 2 is fixedly connected with the absorption bottle. As shown in fig. 1.
The absorption bottle comprises a vent pipe 3, an air heating sleeve 4, a heat insulation sleeve 5, an alkali liquor bottle 6, a water cooling taper sleeve 7, a temperature measuring sleeve 8, a feeding pipe 9, a communicating pipe 10 and a U-shaped pipe 12; the air pipe 3, the air heating sleeve 4, the heat insulating sleeve 5 and the alkali liquor bottle 6 are sequentially and vertically arranged from inside to outside, wherein the upper end of the air pipe 3 is conical, the lower end of the air pipe is in a horn shape, the air heating sleeve 4 is in a cylindrical shape, the heat insulating sleeve 5 is in a double-layer cylindrical shape with a round hole in the center of the bottom, the alkali liquor bottle 6 is in a cylindrical shape with a top closed, and the water cooling taper sleeve 7 is in a conical coil structure; the air pipe 3 penetrates through the air heating sleeve 4 and is fixedly connected with two ends of the air heating sleeve 4 in a sealing manner, a bell mouth at the lower end of the air pipe 3 is embedded into a round hole of the heat insulation sleeve 5 and is fixedly connected with the round hole surface in a sealing manner, the upper end surface of the alkali liquor bottle 6 is fixedly connected with the outer side surface of the upper part of the heat insulation sleeve 5 in a sealing manner, and a gap is formed between the alkali liquor bottle 6 and the bottom of the heat insulation sleeve 5; the water-cooling taper sleeve 7 is arranged between the bell mouth of the vent pipe 3 and the bottom of the alkali liquor bottle 6, most of the upper end of the water-cooling taper sleeve 7 extends into the bell mouth and keeps a small gap with the inner surface of the bell mouth, and a water inlet and outlet pipe at the lower end of the water-cooling taper sleeve 7 downwards penetrates through the bottom of the alkali liquor bottle 6 and is fixedly connected with the alkali liquor bottle 6 in a sealing manner; the temperature measuring sleeve 8 vertically and upwards sequentially penetrates through the bottom of the alkali liquor bottle 6 and the center of the water-cooling taper sleeve 7 and extends into the straight pipe at the lower part of the vent pipe 3, the temperature measuring sleeve 8 is fixedly connected with the bottom of the alkali liquor bottle 6 in a sealing manner, and a thermocouple 11 is arranged in the temperature measuring sleeve 8; the feed pipe 9 and the communicating pipe 10 are respectively and fixedly arranged at two sides of the upper part of the alkali liquor bottle 6, and two ends of the communicating pipe 10 respectively penetrate into the alkali liquor bottle 6 and the air pump 2 and are fixedly connected with the alkali liquor bottle 6 and the air pump 2 in a sealing manner; the U-shaped pipe 12 is arranged on the side surface of the upper part of the air heating sleeve 4, and two ends of the U-shaped pipe 12 respectively penetrate into the air heating sleeve 4 and the air pump 2 and are fixedly connected with the air heating sleeve 4 and the air pump 2 in a sealing manner; in order to ensure the heat preservation effect of the air heating sleeve 4 on the vent pipe 3, the U-shaped pipe 12 preferably extends to the bottom of the air heating sleeve 4; a plug 13 matched with a grinding opening is arranged at the opening end of the distillation tube 1; the thermocouple 11 is externally connected with a controller; the feed pipe 9 is externally connected with a peristaltic pump; the water-cooling taper sleeve 7 is externally connected with a circulating cooling water pump; the heat pipe 14 is externally connected with a compressed air source. The longitudinal axes of the vent pipe 3, the gas heating sleeve 4, the heat insulation sleeve 5, the alkali liquor bottle 6 and the branch pipe 14 are superposed and vertically crossed with the horizontal axis of the distillation pipe 1. The distillation tube 1, the air pump 2, the vent pipe 3, the air heating sleeve 4, the heat insulation sleeve 5, the alkali liquor bottle 6, the water cooling taper sleeve 7, the temperature measurement sleeve 8, the feeding tube 9, the communicating tube 10, the U-shaped tube 12, the plug 13 and the heat conducting tube 14 are all made of quartz glass; the heat insulation sleeve 5 is filled with asbestos fibers. As shown in fig. 1.
The working process of the invention is as follows, an external peristaltic pump is sequentially opened to quantitatively fill absorption liquid into an alkali liquor bottle 6 through a charging pipe 9, an external circulating cooling water pump is opened to fill cold water into a water-cooling taper sleeve 7, a heat conduction pipe 14 is connected with a compressed air source, and an external controller is opened to carry out real-time monitoring on the temperature of the position pointed by a thermocouple 11; the compressed air is input into the distillation absorber from the heat conducting pipe 14 and discharged from the air pump 2, the distillation pipe 1 in the dry distillation production process of the iodine-131 is heated to about 750 ℃, the heat conducting pipe 14 arranged in the distillation pipe 1 and the air flowing through the pipe are simultaneously heated to high temperature, the ventilation pipe 3 is continuously heated when the high-temperature air flows through the air heating sleeve 4, so as to keep the temperature of the carrier gas containing radioactive iodine-131 in the ventilation pipe 3 during the in-pipe transportation process to be more than 200 ℃, thereby reducing the deposition or retention of the iodine-131 on the inner wall of the pipe; the high-temperature air in the air heating sleeve 4 is rapidly ejected from the air pump 2 through the U-shaped pipe 12, high negative pressure is generated in the inner cavity of the pump, the negative pressure of the inner cavity of the pump is transmitted to the distillation pipe 1 through the communicating pipe 10, the alkali liquor bottle 6 and the vent pipe 3 in sequence, the radioactive iodine-131 gas generated in the distillation pipe 1 is driven by the negative pressure to enter the alkali liquor bottle 6 through the vent pipe 3 under the carrying of carrier gas, the high-temperature carrier gas is rapidly cooled by the water-cooling taper sleeve 7 arranged in the horn mouth of the vent pipe, the airborne radioactive iodine-131 is absorbed by absorption liquid (generally dilute sodium hydroxide solution) filled in the alkali liquor bottle 6, and tail gas is discharged from the air pump 2 through the communicating pipe 10, so that the efficient absorption of the airborne radioactive iodine-131 is realized.
Example 2
The present embodiment has the same structure as embodiment 1, except that the inside of the heat insulating jacket 5 in the present embodiment is vacuum.
Claims (4)
1. The compressed air driven I-131 dry distillation absorber is characterized in that: the I-131 dry distillation absorber driven by compressed air comprises a distillation tube (1), an absorption bottle, an air pump (2) and a heat conduction pipe (14) with a circular coil structure, and the connection relationship is that the distillation tube (1) is horizontally arranged, the heat conduction pipe (14) is arranged at the bottom in the distillation tube (1), the absorption bottle is arranged right below the position close to the bottom of the distillation tube (1), and the air pump (2) is arranged on the side surface of the absorption bottle; the top of the absorption bottle penetrates into the distillation tube (1) and is fixedly connected with the distillation tube (1) in a sealing manner, two ends of the heat conduction tube (14) respectively penetrate through the bottom of the distillation tube (1) and penetrate into the top of the absorption bottle and are fixedly connected with the distillation tube (1) and the absorption bottle in a sealing manner, and the air pump (2) is fixedly connected with the absorption bottle;
the absorption bottle comprises an air pipe (3), an air heating sleeve (4), a heat insulation sleeve (5), an alkali liquor bottle (6), a water cooling taper sleeve (7), a temperature measurement sleeve (8), a feeding pipe (9), a communicating pipe (10) and a U-shaped pipe (12); the air pipe (3), the air heating sleeve (4), the heat insulation sleeve (5) and the alkali liquor bottle (6) are sequentially and vertically arranged from inside to outside, wherein the upper end of the air pipe (3) is conical, the lower end of the air pipe is a bell mouth, the air heating sleeve (4) is cylindrical, the heat insulation sleeve (5) is double-layer cylindrical with a round hole in the center of the bottom, the alkali liquor bottle (6) is cylindrical with a top closed, and the water cooling taper sleeve (7) is of a conical coil structure; the air pipe (3) penetrates through the air heating sleeve (4) and is fixedly connected with two ends of the air heating sleeve (4) in a sealing manner, a horn mouth at the lower end of the air pipe (3) is embedded into a round hole of the heat insulation sleeve (5) and is fixedly connected with a round hole surface in a sealing manner, the upper end surface of the alkali liquor bottle (6) is fixedly connected with the outer side surface of the upper part of the heat insulation sleeve (5) in a sealing manner, and a gap is formed between the alkali liquor bottle (6) and the bottom of the heat insulation sleeve (5); the water-cooling taper sleeve (7) is arranged between the bell mouth of the vent pipe (3) and the bottom of the alkali liquor bottle (6), the water-cooling taper sleeve (7) is positioned in the bell mouth and keeps a small gap with the inner surface of the bell mouth, and a water inlet and outlet pipe at the lower end of the water-cooling taper sleeve (7) downwards penetrates through the bottom of the alkali liquor bottle (6) and is fixedly connected with the alkali liquor bottle (6) in a sealing manner; the temperature measuring sleeve (8) vertically and upwards sequentially penetrates through the bottom of the alkali liquor bottle (6) and the center of the water-cooling taper sleeve (7) and extends into the straight pipe at the lower part of the vent pipe (3), the temperature measuring sleeve (8) is fixedly connected with the bottom of the alkali liquor bottle (6) in a sealing manner, and a thermocouple (11) is arranged in the temperature measuring sleeve (8); the feed pipe (9) and the communicating pipe (10) are respectively and fixedly arranged at two sides of the upper part of the alkali liquor bottle (6), and two ends of the communicating pipe (10) respectively penetrate into the alkali liquor bottle (6) and the air pump (2) and are fixedly connected with the alkali liquor bottle (6) and the air pump (2) in a sealing manner; the U-shaped pipe (12) is arranged on the side surface of the upper part of the air heating sleeve (4), and two ends of the U-shaped pipe (12) respectively penetrate into the air heating sleeve (4) and the air pump (2) and are fixedly connected with the air heating sleeve (4) and the air pump (2) in a sealing manner;
a plug (13) matched with a grinding opening is arranged at the opening end of the distillation tube (1);
the thermocouple (11) is externally connected with a controller; the feed pipe (9) is externally connected with a peristaltic pump; the water-cooling taper sleeve (7) is externally connected with a circulating cooling water pump; the heat conduction pipe (14) is externally connected with a compressed air source.
2. The compressed air driven I-131 destructive distillation absorber according to claim 1, wherein: the longitudinal axis of the vent pipe (3), the gas heating sleeve (4), the heat insulation sleeve (5), the alkali liquor bottle (6) and the branch pipe (14) is superposed and vertically crossed with the horizontal axis of the distillation pipe (1).
3. The compressed air driven I-131 destructive distillation absorber according to claim 1, wherein: the distillation tube (1), the air pump (2), the air pipe (3), the air heating sleeve (4), the heat insulation sleeve (5), the alkali liquor bottle (6), the water cooling taper sleeve (7), the temperature measuring sleeve (8), the feeding tube (9), the communicating tube (10), the U-shaped tube (12), the plug (13) and the heat conducting tube (14) are all made of quartz glass;
the heat insulation sleeve (5) is filled with asbestos fiber or vacuumized.
4. The compressed air driven I-131 destructive distillation absorber according to claim 1, wherein: the U-shaped pipe (12) extends to the bottom of the gas heating sleeve (4) in the gas heating sleeve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211741673.3A CN115945035A (en) | 2022-12-31 | 2022-12-31 | I-131 dry distillation absorber driven by compressed air |
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| CN202211741673.3A CN115945035A (en) | 2022-12-31 | 2022-12-31 | I-131 dry distillation absorber driven by compressed air |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115957527A (en) * | 2022-12-31 | 2023-04-14 | 中国工程物理研究院核物理与化学研究所 | High-efficiency production of Na 131 I device of solution |
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| US20240002231A1 (en) * | 2020-11-27 | 2024-01-04 | Casale Sa | Ammonia burner for nitric acid production |
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| CN115957527A (en) * | 2022-12-31 | 2023-04-14 | 中国工程物理研究院核物理与化学研究所 | High-efficiency production of Na 131 I device of solution |
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