CN116036837A - High-temperature gas auxiliary heating type iodine-131 steam treatment device - Google Patents

High-temperature gas auxiliary heating type iodine-131 steam treatment device Download PDF

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Publication number
CN116036837A
CN116036837A CN202211735766.5A CN202211735766A CN116036837A CN 116036837 A CN116036837 A CN 116036837A CN 202211735766 A CN202211735766 A CN 202211735766A CN 116036837 A CN116036837 A CN 116036837A
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pipe
sleeve
alkali liquor
furnace
air
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Inventor
刘国平
涂俊
张锐
林青川
熊晓玲
邓建
魏洪源
党宇峰
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Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics
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Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics
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Priority to CN202211735766.5A priority Critical patent/CN116036837A/en
Publication of CN116036837A publication Critical patent/CN116036837A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/68—Halogens or halogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0006—Controlling or regulating processes
    • B01J19/0013—Controlling the temperature of the process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/2415—Tubular reactors
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D3/00—Halides of sodium, potassium or alkali metals in general
    • C01D3/12—Iodides
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
    • G21G1/00—Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation or particle bombardment, e.g. producing radioactive isotopes
    • G21G1/04—Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation or particle bombardment, e.g. producing radioactive isotopes outside nuclear reactors or particle accelerators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/30—Alkali metal compounds
    • B01D2251/304—Alkali metal compounds of sodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/604—Hydroxides
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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Abstract

The invention discloses a high-temperature gas assisted heating type iodine-131 vapor treatment device, which comprises an absorption bottle, a horizontal tube furnace, a rack and a lifting mechanism. The horizontal tube furnace is horizontally and fixedly arranged on the table top of the rack, the lifting mechanism is fixedly arranged under the table top right below the horizontal tube furnace, the absorption bottle is placed on the objective table of the lifting mechanism, and the absorption bottle and the horizontal tube furnace are in non-fixed connection in a glass grinding port butt joint mode. The iodine-131 vapor treatment device can efficiently absorb radioactive iodine-131 in high-temperature carrier gas, greatly reduce the deposition or retention of iodine-131 in a conveying pipeline, improve the production efficiency, directly utilize the heat of a furnace tube, do not need an additional heat supply device, and have simple structure and high energy utilization rate.

Description

High-temperature gas auxiliary heating type iodine-131 steam treatment device
Technical Field
The invention belongs to the technical field of radioisotope preparation, and particularly relates to a high-temperature gas assisted heating type iodine-131 vapor treatment device.
Background
Sodium iodide used by medical institutions 131 I-NaI) and iodine-131 labeled medicines are mainly derived from tellurium dioxide activated by reactor irradiation and are mainly produced by a carbonization method. Except for the institute of nuclear physics and chemistry of the unit-China engineering physical institute, the national institute of atomic energy science and the national institute of nuclear power are engaged in the dry distillation production of iodine-131, and a production device is established. However, the existing production technology has the problems that iodine-131 distilled from the target material is easy to deposit or stay on the inner wall of a pipeline in the carrier gas carrier tape transportation process, particularly at the lower temperature of the exposed pipeline connected with an absorption bottle, the product yield is low, the production time is long, and the like, which is not beneficial to improving the production benefit. In order to ensure the effective recovery of iodine-131, the inventor also proposes to use an electric heating type air-borne iodine-131 absorption device, but the device needs to use a separate heating device, and the device is relatively complex; while consuming additional energy.
Disclosure of Invention
In order to overcome the defects of low product yield and long production time caused by easy deposition or retention of iodine-131 distilled from a target material on the inner wall of a pipeline in the carrier gas carrier tape transportation process in the prior art, the invention provides the high-temperature gas assisted heating type iodine-131 vapor treatment device capable of efficiently absorbing radioactive iodine-131 in carrier gas.
The technical scheme for realizing the invention is as follows:
the invention relates to a high-temperature gas auxiliary heating type iodine-131 vapor treatment device which is characterized by comprising an absorption bottle, a horizontal tube furnace, a rack and a lifting mechanism, wherein the connection relation is that the horizontal tube furnace is horizontally and fixedly arranged on the table top of the rack, the lifting mechanism is fixedly arranged under the table top right below the horizontal tube furnace, the absorption bottle is arranged on a stage of the lifting mechanism, and the absorption bottle and the horizontal tube furnace are in non-fixed connection in a glass grinding port butt joint mode.
The absorption bottle comprises a vent 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, an exhaust pipe I, an air inlet pipe and an exhaust pipe II; the vent pipe, the gas heating sleeve, the heat insulation sleeve and the alkali liquor bottle are sequentially arranged vertically from inside to outside, wherein the upper end of the vent pipe is a conical outer grinding opening, the lower end of the vent pipe is a bell mouth, the shape of the gas heating sleeve is cylindrical, the shape of the heat insulation sleeve is a double-layer barrel shape with a round hole arranged at the center of the bottom, and the shape of the alkali liquor bottle is a barrel shape with a closed top; the vent pipe penetrates through the gas heating sleeve and is fixedly connected with two ends of the gas heating sleeve in a sealing manner, the horn mouth at the lower end of the vent pipe is embedded into the round hole of the heat insulation sleeve and is fixedly connected with the round hole face in a sealing manner, the upper end face of the alkali liquor bottle is fixedly connected with the outer side face 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 horn mouth of the vent pipe and the bottom of the alkali liquor bottle, is positioned in the horn mouth and keeps a smaller gap with the inner surface of the horn mouth, and the water inlet and outlet pipe at the lower end of the water-cooling taper sleeve vertically penetrates out of the bottom of the alkali liquor bottle and is fixedly connected with the alkali liquor bottle in a sealing way; the temperature measuring sleeve vertically and upwards penetrates through the bottom of the alkali liquor bottle and the center of the water-cooling taper sleeve in sequence and stretches 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 charging pipe and the exhaust pipe I are respectively and fixedly arranged at two sides of the upper part of the alkali liquor bottle; the air inlet pipe and the air outlet pipe II are respectively arranged at the top and the upper side surface of the air heating sleeve.
The horizontal tube furnace comprises a furnace body, a furnace tube and a heat conduction tube; the furnace tube is horizontally placed in the furnace body, a branch pipe with a conical inner grinding port is vertically and fixedly connected to the position, close to the bottom, in the furnace tube, a hole is formed in the furnace body at a position corresponding to the position right below the branch pipe, and the upper end of the vent pipe extends into the branch pipe to be in butt joint with the conical inner grinding port of the branch pipe; the heat conducting pipe is arranged on the furnace body right below the furnace tube, both ends of the heat conducting pipe extend downwards out of the furnace body, and one end of the heat conducting pipe is in airtight connection with the air inlet pipe of the absorption bottle.
The lifting mechanism comprises a screw, a screw cap and an objective table, wherein the objective table is annular and is symmetrically provided with two small round holes; the screw rod perpendicular fixed mounting under the mesa of rack, the nut is installed in the well lower part of screw rod and with screw rod sliding connection, the objective table wears on the screw rod and places on the nut through little round hole, objective table and screw rod sliding connection are provided with annular rubber pad on the objective table, the absorption bottle is placed on the rubber pad.
The horizontal tube furnace and the thermocouple are connected with an external controller through wires; the feeding pipe is externally connected with a peristaltic pump; the exhaust pipe I is externally connected with an exhaust treatment device; the water-cooling taper sleeve is externally connected with a circulating cooling water pump; the other end of the heat conduction pipe is externally connected with a compressed air source.
Preferably, the longitudinal axes of the vent pipe, the air heating sleeve, the heat insulation sleeve, the alkali liquor bottle and the branch pipe are coincident.
Preferably, the vent pipe, the gas heating sleeve, the heat insulation sleeve, the alkali liquor bottle, the water cooling taper sleeve, the temperature measurement sleeve, the feeding pipe, the exhaust pipe I, the furnace pipe, the branch pipe, the air inlet pipe, the heat conduction pipe and the exhaust pipe II are all made of quartz glass; asbestos fibers are filled in the heat insulation sleeve or vacuum is pumped.
Preferably, the conical outer grinding mouth at the upper end of the vent pipe is in airtight fit with the bell-mouth-shaped inner grinding mouth of the branch pipe.
Preferably, the air inlet pipe extends all the way to the bottom of the air heating sleeve.
According to the high-temperature gas auxiliary heating type iodine-131 vapor treatment device, the method for heating and preserving heat is implemented on the air-borne iodine-131 conveying pipeline, so that the air-borne radioactive iodine-131 distilled from the furnace tube is efficiently absorbed, and the simple working principle is as follows: the preheated compressed air is injected into the air heating sleeve to heat the vent pipe at a constant temperature (the temperature is controlled to be about 300 ℃), so that the temperature of the carrier gas containing radioactive iodine-131 discharged from the furnace pipe in the transportation process is kept to be more than 200 ℃, thereby reducing the deposition or detention of the gaseous iodine-131 on the inner wall of the pipeline, and then the high-temperature carrier gas discharged from the vent pipe and the absorption liquid (usually dilute sodium hydroxide solution) filled in the alkali liquor bottle are rapidly and fully cooled by adopting a water cooling taper sleeve mostly arranged in a bell mouth at the lower end of the vent pipe, so that the high-efficiency absorption of the air-borne radioactive iodine-131 is realized.
The high-temperature gas auxiliary heating type iodine-131 vapor treatment device adopts a vertical structural layout, the heat conducting pipe is arranged adjacent to the furnace tube, heat in the furnace tube is used for heating gas, and the heated gas is used for heat preservation of the vent tube, so that the defects that a connecting pipeline is long, the pipeline needs multiple turns and cannot realize whole-course heat preservation of carrier gas transportation in the prior art are overcome, the production efficiency is greatly improved, an additional heating device is not needed, and the operation stability and the safety are good.
Drawings
FIG. 1 is a schematic diagram of a high temperature gas assisted heating iodine-131 vapor treatment device;
in the figure:
1. a table top; 2. an objective table; 3. a vent pipe; 4. a gas heating sleeve; 5. a heat insulating sleeve; 6. an alkali liquor bottle; 7. water-cooling taper sleeve; 8. a temperature measuring sleeve; 9. a feeding tube; 10. an exhaust pipe I; 11. a thermocouple; 12. a furnace body; 13. a furnace tube; 14. a branch pipe; 15. a screw; 16. a screw cap; 17. a rubber pad; 18. an air inlet pipe; 19. a heat conduction pipe; 20. and an exhaust pipe II.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without creating effort for a person skilled in the art.
The present invention will be described in further detail with reference to the following detailed description and the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
Example 1
FIG. 1 is a schematic diagram of a high temperature gas assisted heating type iodine-131 vapor treatment device according to the present invention. In fig. 1, the high-temperature gas assisted heating type iodine-131 vapor treatment device comprises an absorption bottle, a horizontal tube furnace, a rack and a lifting mechanism, wherein the connection relation is that the horizontal tube furnace is horizontally and fixedly arranged on a table top 1 of the rack, the lifting mechanism is fixedly arranged under the table top 1 right below the horizontal tube furnace, the absorption bottle is arranged on a stage 2 of the lifting mechanism, and the absorption bottle is in non-fixed connection with the horizontal tube furnace in a glass grinding port butt joint mode. See 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, an exhaust pipe I10, an air inlet pipe 18 and an exhaust pipe II 20; the vent pipe 3, the air heating sleeve 4, the heat insulation sleeve 5 and the alkali liquor bottle 6 are sequentially arranged vertically from inside to outside, wherein the upper end of the vent pipe 3 is a conical outer grinding opening, the lower end of the vent pipe is a horn opening, 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, and the alkali liquor bottle 6 is cylindrical with a closed top; the vent 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 vent 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 horn 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 stretches into the horn mouth and keeps a small gap with the inner surface of the horn mouth, and the water inlet and outlet pipe at the lower end of the water-cooling taper sleeve 7 vertically penetrates out of 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 penetrates through the bottom of the alkali liquor bottle 6 and the center of the water-cooling taper sleeve (7) in sequence and stretches 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 feeding pipe 9 and the exhaust pipe I10 are respectively and fixedly arranged at two sides of the upper part of the alkali liquor bottle 6; the air inlet pipe 18 and the air outlet pipe II 20 are respectively arranged at the top and the upper side surface of the air heating sleeve 4; the horizontal tube furnace comprises a furnace body 12, a furnace tube 13 and a heat conducting tube 19; the furnace tube 13 is horizontally arranged in the furnace body 12, a branch tube 14 with a conical inner grinding mouth is vertically and fixedly connected to the position, close to the bottom, in the furnace tube 13, a hole is formed in the furnace body 12 at the corresponding position right below the branch tube 14, and the upper end of the ventilation tube 3 extends into the branch tube 14 to be in butt joint with the conical inner grinding mouth of the branch tube 14; the heat conducting pipe 19 is arranged on the furnace body 12 right below the furnace tube 13, both ends of the heat conducting pipe 19 extend downwards out of the furnace body, and one end of the heat conducting pipe is in airtight connection with the air inlet pipe 18 of the absorption bottle; the lifting mechanism comprises a screw rod 15, a screw cap 16 and an objective table 2, wherein the objective table 2 is annular and is symmetrically provided with two small round holes; the screw 15 is vertically and fixedly arranged below the table top 1 of the rack, the screw cap 16 is arranged at the middle lower part of the screw 15 and is in sliding connection with the screw 15, namely, the screw cap 16 can be rotated to realize the up-and-down movement of the screw cap 16 along the screw 15, the object stage 2 penetrates through the screw 15 through a small round hole and is placed on the screw cap 16, the object stage 2 is in sliding connection with the screw 15, the object stage 2 is provided with a circular rubber pad 17, and the absorption bottle is placed on the rubber pad 17; the horizontal tube furnace and the thermocouple 11 are connected with an external controller through wires; the feeding pipe 9 is externally connected with a peristaltic pump; the exhaust pipe I10 is externally connected with an exhaust treatment device; the water-cooling taper sleeve 7 is externally connected with a circulating cooling water pump; the other end of the heat conducting pipe 19 is externally connected with a compressed air source. The longitudinal axes of the vent pipe 3, the air heating sleeve 4, the heat insulation sleeve 5, the alkali liquor bottle 6 and the branch pipe 14 are overlapped. The vent pipe 3, the gas 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 pipe 9, the exhaust pipe I10, the furnace pipe 13, the branch pipe 14, the gas inlet pipe 18, the heat conduction pipe 19 and the exhaust pipe II 20 are all made of quartz glass; asbestos fibers are filled in the heat insulation sleeve 5. The conical outer grinding mouth at the upper end of the vent pipe 3 is in airtight fit with the bell-mouth-shaped inner grinding mouth of the branch pipe 14. See fig. 1.
The working flow 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, an external tail gas treatment device is opened to pump air into the alkali liquor bottle 6, a heat conducting pipe 19 is connected with a compressed air source, an external controller furnace body 12 is opened to be connected with a power supply for heating a furnace pipe 13 and the heat conducting pipe 19, a thermocouple 11 is used for carrying out temperature detection on a straight pipe at the lower end of a ventilation pipe 3, high-temperature air flow flowing out from the heat conducting pipe 19 flows into an air heating sleeve 4, and the ventilation pipe 3 is heated and kept warm (the temperature is controlled to be about 300 ℃), so that the temperature of carrier gas containing radioactive iodine-131 generated in the furnace pipe 13 in the transportation process of the carrier gas into the alkali liquor bottle 6 through a branch pipe 14 and the ventilation pipe 3 is kept to be more than 200 ℃, and deposition or retention of the iodine-131 on the inner wall of a transportation pipeline is reduced. The carrier gas entering the bell mouth at the lower end of the vent pipe 3 is rapidly cooled by the water-cooling taper sleeve 7, iodine-131 in the carrier gas is rapidly absorbed by the absorption liquid in the alkali liquor bottle 6, and tail gas is discharged out of the alkali liquor bottle 6 through the exhaust pipe I10, so that the high-efficiency absorption of the air-borne radioactive iodine-131 is realized.
Example 2
The present embodiment has the same structure as that of embodiment 1, except that the inside of the heat insulating jacket 5 in the present embodiment is vacuum.

Claims (5)

1. A high-temperature gas assisted heating type iodine-131 vapor treatment device is characterized in that: the high-temperature gas auxiliary heating type iodine-131 vapor treatment device comprises an absorption bottle, a horizontal tube furnace, a rack and a lifting mechanism, wherein the connection relation is that the horizontal tube furnace is horizontally and fixedly arranged on a table top (1) of the rack, the lifting mechanism is fixedly arranged under the table top (1) right below the horizontal tube furnace, the absorption bottle is placed on a stage (2) of the lifting mechanism, and the absorption bottle and the horizontal tube furnace are in non-fixed connection in a glass grinding port butt joint mode.
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), an exhaust pipe I (10), an air inlet pipe (18) and an exhaust pipe II (20); the air pipe (3), the air heating sleeve (4), the heat insulation sleeve (5) and the alkali liquor bottle (6) are sequentially arranged vertically from inside to outside, wherein the upper end of the air pipe (3) is a conical outer grinding opening, the lower end of the air heating sleeve is a bell mouth, the air heating sleeve (4) is cylindrical, the heat insulation sleeve (5) is a double-layer barrel with a round hole arranged at the center of the bottom, and the alkali liquor bottle (6) is a barrel with a closed top; the vent 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 vent 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 face of the alkali liquor bottle (6) is fixedly connected with the outer side face 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 the water inlet and outlet pipe at the lower end of the water-cooling taper sleeve (7) vertically penetrates out of 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 penetrates through the bottom of the alkali liquor bottle (6) and the center of the water-cooling taper sleeve (7) in sequence and stretches 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 feeding pipe (9) and the exhaust pipe I (10) are respectively and fixedly arranged at two sides of the upper part of the alkali liquor bottle (6); the air inlet pipe (18) and the air outlet pipe II (20) are respectively arranged at the top and the upper side surface of the air heating sleeve (4);
the horizontal tube furnace comprises a furnace body (12), a furnace tube (13) and a heat conducting tube (19); the furnace tube (13) is horizontally arranged in the furnace body (12), a branch tube (14) with a conical inner grinding mouth is vertically and fixedly connected to the position, close to the bottom, in the furnace tube (13), a hole is formed in the furnace body (12) at the corresponding position right below the branch tube (14), and the upper end of the ventilation tube (3) extends into the branch tube (14) to be in butt joint with the conical inner grinding mouth of the branch tube (14); the heat conducting pipe (19) is arranged on the furnace body (12) right below the furnace tube (13), both ends of the heat conducting pipe (19) downwards extend out of the furnace body, and one end of the heat conducting pipe is in airtight connection with the air inlet pipe (18) of the absorption bottle;
the lifting mechanism comprises a screw (15), a screw cap (16) and an objective table (2), wherein the objective table (2) is in a circular shape and is symmetrically provided with two small round holes; the screw rod (15) is vertically and fixedly arranged below a table top (1) of the rack, the screw cap (16) is arranged at the middle lower part of the screw rod (15) and is in sliding connection with the screw rod (15), the object stage (2) penetrates through the screw rod (15) through a small round hole and is placed on the screw cap (16), the object stage (2) is in sliding connection with the screw rod (15), the object stage (2) is provided with a circular rubber pad (17), and the absorption bottle is placed on the rubber pad (17);
the horizontal tube furnace and the thermocouple (11) are connected with an external controller through wires; the feeding pipe (9) is externally connected with a peristaltic pump; the exhaust pipe I (10) is externally connected with an exhaust gas treatment device; the water-cooling taper sleeve (7) is externally connected with a circulating cooling water pump; the other end of the heat conducting pipe (19) is externally connected with a compressed air source.
2. The high temperature gas-assisted heating type iodine-131 vapor treatment device according to claim 1, wherein: the longitudinal axis lines of the vent pipe (3), the air heating sleeve (4), the heat insulation sleeve (5), the alkali liquor bottle (6) and the branch pipe (14) are overlapped.
3. The high temperature gas-assisted heating type iodine-131 vapor treatment device according to claim 1, wherein: 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 pipe (9), the exhaust pipe I (10), the furnace pipe (13), the branch pipe (14), the air inlet pipe (18), the heat conduction pipe (19) and the exhaust pipe II (20) are all made of quartz glass; asbestos fibers are filled in the heat insulation sleeve (5) or vacuum is pumped.
4. The high temperature gas-assisted heating type iodine-131 vapor treatment device according to claim 1, wherein: the conical outer grinding mouth at the upper end of the vent pipe (3) is in airtight fit with the bell-mouthed inner grinding mouth of the branch pipe (14).
5. The high temperature gas-assisted heating type iodine-131 vapor treatment device according to claim 1, wherein: the air inlet pipe (18) extends to the bottom of the air heating sleeve (4).
CN202211735766.5A 2022-12-31 2022-12-31 High-temperature gas auxiliary heating type iodine-131 steam treatment device Pending CN116036837A (en)

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Application Number Priority Date Filing Date Title
CN202211735766.5A CN116036837A (en) 2022-12-31 2022-12-31 High-temperature gas auxiliary heating type iodine-131 steam treatment device

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Application Number Priority Date Filing Date Title
CN202211735766.5A CN116036837A (en) 2022-12-31 2022-12-31 High-temperature gas auxiliary heating type iodine-131 steam treatment device

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