CN208482464U - Bushing type I-131 destructive distillation absorber - Google Patents

Abstract

The utility model discloses a kind of bushing type I-131 destructive distillation absorber, the destructive distillation absorber includes the absorption slot part being vertically arranged and horizontally disposed distillation sleeve portion；Wherein, the absorption slot part contains alkali liquid tank, water-bath tank, coil pipe, and distillation sleeve portion contains casing, distillation cascade, and distillation cascade one end is horn mouth.The distillation cascade is placed in casing, and casing one end is fixedly connected with the horn mouth of distillation cascade, and the casing other end is fixedly connected with lye pot sidewall；The water-bath tank is placed in alkali liquid tank, and coil pipe is placed in water-bath tank；The upper end pipeline of the coil pipe sequentially passes through water-bath tank obliquely, alkali liquid tank, casing, pierces into distillation cascade and leakproofness is fixedly connected respectively with water-bath tank, alkali liquid tank, distillation cascade, there is an angle between coil pipe upper end pipeline and horizontal line；Coil pipe lower channel is vertically pierced by water-bath pot bottom center and is fixedly connected with water-bath tank leakproofness.The destructive distillation absorber of the utility model being capable of rapid acquiring high temperature I-131 steam, more conducively raising Na¹³¹I production efficiency and safety.

Description

Bushing type I-131 destructive distillation absorber

Technical field

The utility model belongs to radioactive isotope preparation technical field, and in particular to a kind of bushing type I-131 destructive distillation suction Receive device.

Background technique

For producing the Na of radioactive drugs¹³¹After I raw material mainly passes through the irradiation of high temperature (about 750 DEG C) dry distillation reactor heap TeO₂(tellurium dioxide) and carrier gas (generally sky is absorbed with sig water (generally NaOH solution of the concentration less than 0.5mol/L) Gas) in radioactivity iodine -131 steam be made.Inst. of Nuclear Physics and Chemistry, Chinese Engineering Physics Research Ins, and domestic China Atomic Energy Research Establishment and Chinese nuclear power research institute, once in its Na¹³¹Using the side of vacuum pump pumping in I production technology High temperature carrier gas in retort is introduced directly into absorption bottle bottom by pipeline and is bubbled by formula, and the iodine -131 steam in carrier gas is by bottle Interior sig water transforms into Na¹³¹I solution.But due to very high and the absorbing liquid in absorption bottle the small volume (one of carrier gas temperature As be no more than 20mL), distillation extract iodine -131 during be easy to so that the temperature of absorbing liquid quickly increases and in absorption bottle There is " fog " and is drawn into exhaust gas processing device in top, and I-131 vapor adsorption inefficiency and absorbing liquid in carrier gas is caused to be steamed Hair loses more radioiodine, and bigger pressure is also caused for the online processing of tail gas and qualified discharge.Reduce flow rate of carrier gas Advantageously reducing heat exchange leads to the evaporation of absorbing liquid, but is unfavorable for preventing iodine -131 steam mistake temperature in gas-guide tube from being adsorbed by tube wall And lose, also it is unfavorable for setting out in time for the intracavitary a large amount of iodine -131s of retort, causes production (distillation or heat preservation) time and carrier gas The absorbing liquid continuous heating time is extended, and there are the greater risks that iodine -131 steam is leaked from feed inlet, especially in dioxy Change tellurium and reaches the fusing point moment.Since domestic destructive distillation heap shines TeO₂Produce Na¹³¹The device of I is all made of vacuum pump pumping and keeps carrying Gas directed flow, and keep the intracavitary certain negative pressure of retort to prevent iodine -131 vapour leakage, and higher in order to meet product The requirement of radioactive concentration, the diluted alkaline liquid measure being added in the absorption bottle of tubulose are less.On the other hand, existing heap shines TeO₂It is dry Furnace is without charging and material unloading function online, it is necessary to be down at least 150 DEG C or less (distillations of iodine in upper batch production furnace temperature Temperature is about 185 DEG C, preferably close to room temperature) take out residue after could charge again and carry out lower batch production, batch production time Often it is no less than 6 hours, and wherein about 80% time is used for furnace body natural cooling.Since iodine is easily evaporated and is inhaled It is attached, directly the bottoms of high temperature are taken out, or remove the plug of distillation cascade bottoms are placed on nozzle cooling is to be prohibited , and absorbing liquid evaporation, and high-temperature furnace body holding to distillation cascade and its interior bottoms can be accelerated by improving flow rate of carrier gas The time of continuous heat supply can't be significantly affected by flow rate of carrier gas, unless using heat-insulated to distillation cascade or furnace body can be made quick Otherwise the method for heat dissipation is difficult to significantly shorten the production time.Based on previous reasons, the iodine -131 yield of the prior art is often below 90%, the batch production time is long and the risk of iodine -131 vapour leakage pollution environment is higher, is unfavorable for implementing continuous multiple batches of height Effect, safety in production.Although the temperature of distillation outlet of still carrier gas can be reduced using one section of low-temperature space is increased behind high temperature distillation area Degree is not carried pipe before by lye absorption processing for iodine -131 in guarantee carrier gas to cut down the heating effect to absorbing liquid Road inner wall is adsorbed and is caused damages, and the temperature general control of carrier gas is still bright to the effect of absorbing liquid heating evaporation at 300 DEG C or so It is aobvious.Moreover, the distillation cascade of the prior art and absorber be it is split type, connected using plastic tube or rubber tube, the radiation in carrier gas The intense gamma radiation of property iodine -131 and high temperature have larger impact to the service life of connecting tube, are easy to appear season cracking in practice And lead to radioactivity iodine -131 vapour leakage accident, it shortens service life and increases production equipment maintenance and repair personnel receiving The risk of more dose of radiations, is unfavorable for keeping the safety in production.There is efficiently cooling and quickening distillation cascade drop to Alkali absorption liquid using setting Temperature function, and be suitable for hot cell or shield compact-sized, the small and exquisite distillation cascade and absorber of production environment condition in work box Integration-in-one destructive distillation absorber is the main path for solving prior art defect.

Summary of the invention

In order to improve Na¹³¹The production efficiency of I solution, reduces security risk, and the utility model provides a kind of bushing type I- 131 destructive distillation absorbers.

The destructive distillation absorber of the utility model using compressed air stream it is heat-insulated and to absorbing liquid it is cooling by the way of and distillation cascade With the structure of absorber integration-in-one, the height distilled from the tellurium dioxide raw material that reactor activates can be efficiently trapped Warm radioactivity iodine -131 steam, so that the high income of iodine -131 is of about 98%, the batch production time is foreshortened to about 2 hours, extends life It produces device lifetime and the security risk of production is effectively reduced.

The technical scheme for implementing the utility model is as follows:

The bushing type I-131 destructive distillation absorber of the utility model, its main feature is that, the destructive distillation absorber includes setting vertically The absorption slot part and horizontally disposed distillation sleeve portion set；Wherein, the absorption slot part contains alkali liquid tank, water-bath Tank, coil pipe, distillation sleeve portion contain casing, distillation cascade, and distillation cascade one end is horn mouth；The connection of above-mentioned destructive distillation absorber is closed System is that the distillation cascade is placed in casing, and casing one end is fixedly connected with the horn mouth of distillation cascade, the casing other end and lye Pot sidewall is fixedly connected；The water-bath tank is placed in alkali liquid tank, and coil pipe is placed in water-bath tank；The upper end pipeline of the coil pipe Water-bath tank is sequentially passed through obliquely, alkali liquid tank, casing, is pierced into distillation cascade and is distinguished leakproofness with water-bath tank, alkali liquid tank, distillation cascade It is fixedly connected, there is an angle between coil pipe upper end pipeline and horizontal line；Coil pipe lower channel is vertically pierced by water-bath pot bottom center And it is fixedly connected with water-bath tank leakproofness.

Laterally the triple valve being connected to, two-way valve are fixedly installed respectively with bottom center at the top of the alkali liquid tank, three The baffle of circular ring shape is fixedly installed on alkali liquid tank inner sidewall between port valve and water-bath tank deck；The water-bath tank is provided with L The charge pipe of type, water inlet pipe, L-type drainpipe, the upper end level of charge pipe be pierced by lye pot sidewall and with alkali liquid tank leakproofness It is fixedly connected, the lower end of charge pipe is pierced by water-bath tank vertically downward and is fixedly connected with water-bath tank leakproofness, water inlet pipe and draining The lower end side-by-side horizontal of pipe is through water-bath tank and alkali liquid tank lower part and is fixedly connected respectively with water-bath tank, alkali liquid tank leakproofness, arranges The upper port of water pipe is placed in water-bath tank and has a gap with water-bath tank top.

The both ends of the casing are respectively arranged with air inlet pipe, exhaust pipe；It is equipped in the distillation cascade horn mouth There is plug, is fixedly connected by link block with internal surface of sleeve pipe below distillation cascade；The alkali liquid tank and water-bath pot sidewall passes through company It connects block to be fixedly connected, steel wire, steel wire and alkali liquid tank is provided between alkali liquid tank and water-bath pot sidewall and water-bath tank is distinguished Contact.

Angle between the coil pipe upper end pipeline and horizontal line is 5 ° ~ 10 °.

Gap between the casing and distillation cascade side wall is 10mm ~ 20mm.

The horizontal axis line of the casing, distillation cascade is to be overlapped setting；The alkali liquid tank, water-bath tank, coil pipe it is vertical Axial line is to be overlapped setting；The horizontal axis line of the casing and the vertical axis line of alkali liquid tank are arranged in a crossed manner.

The alkali liquid tank, water-bath tank, coil pipe, triple valve, two-way valve, baffle, charge pipe, water inlet pipe, drainpipe, set Pipe, distillation cascade, plug, air inlet pipe, exhaust pipe and link block are all made of quartz glass production；The steel wire uses stainless steel Production.

The brief working principle of the bushing type I-131 destructive distillation absorber of the utility model is: under vacuum pump twitch, being placed in Heap in distillation cascade shines TeO₂It is heated to the high temperature iodine -131 steam that about 750 DEG C of meltings are overflowed, is contained by carrier gas from distillation cascade Band is sent into lye pot bottom by way of the coil pipe being placed in water-bath tank and is bubbled, and carrier gas is gradually cooled down in flow process in coil pipe, The heat release that carrier gas contacts the disproportionated reaction that heat exchange and I-131 and alkali occurs with lye passes through tube wall heat exchange by cold in water-bath tank Water is quickly taken away, and making the temperature of absorbing liquid, the temperature remains within the normal range in entire production process or increasing extent of temperature is smaller, and terminates in distillation After closing heating power supply, it is passed through compressed air stream immediately and takes away furnace body heat supply rapidly, it is real to distillation cascade and its interior bottoms Fast cooling is applied, after bottoms temperature is down to specified value, elution is impregnated by back pressure absorbing liquid and condenses in coil pipe inner wall Iodine -131 realizes efficient absorption and Na to iodine -131 steam in high temperature carrier gas¹³¹Efficient, the safety in production of I solution.

The destructive distillation absorber of the utility model uses the absorption slot of bushing type distillation cascade and two-stage cooling sandwith layer structure, first High temperature carrier gas is substantially cooled down in coil pipe, then by remainder pass to absorbing liquid heat and disproportionated reaction heat to greatest extent Take away, when cooling water keeps general running water pressure, it is ensured that high temperature under high flow velocities (or larger flow) carries Gas is unobvious to the heating of small size absorbing liquid, prevents or reduce to greatest extent the damage of iodine -131 caused by the generation of " fog " It loses；Using what is be arranged be immersed in steel wire intensive in absorbing liquid between alkali liquid tank and water-bath tank, biggish carrier gas is steeped and is carried out Segmentation increase and absorbing liquid contact area and growth time of contact (increasing bubble moving distance), have been effectively ensured high flow velocities The absorption efficiency of I-131 steam in carrier gas.Distillation terminates to be passed through normal temperature compressed air into casing immediately after closing heating power supply, The air quickly flowed efficiently takes away the heat that furnace body radiates, and plays heat insulation and heat control to distillation cascade and its interior bottoms Effect, has been greatly shortened the cooling time of bottoms.Compact-sized, small and exquisite, the peace of the destructive distillation absorber of the utility model Full property and good reliability.

Detailed description of the invention

Fig. 1 is the general structure schematic diagram of the bushing type I-131 destructive distillation absorber of the utility model；

Fig. 2 is the overlooking structure diagram of the absorption slot in the utility model；

Fig. 3 is the A-A schematic cross-sectional view of the absorption slot in the utility model；

Fig. 4 is the B-B schematic cross-sectional view in Fig. 1；

Fig. 5 is the C-C schematic cross-sectional view of the absorption slot in the utility model；

Fig. 6 is the D-D schematic cross-sectional view of the distillation casing in the utility model；

1. alkali liquid tank, 2. water-bath tank, 3. coil pipe, 4. steel wire, 5. triple valve, 6. two-way valve, 7. baffle 8. adds in figure 14. air inlet pipe of expects pipe 9. water inlet pipe, 10. drainpipe, 11. casing, 12. distillation cascade, 13. plug, 15. exhaust pipe.

Specific embodiment

The present invention will be further described with reference to the accompanying drawings and examples.

Embodiment 1

Fig. 1 is the general structure schematic diagram of the bushing type I-131 destructive distillation absorber of the utility model, and Fig. 2 is that this is practical new The overlooking structure diagram of absorption slot in type, Fig. 3 are the A-A schematic cross-sectional view of the absorption slot in the utility model, Fig. 4 It is the B-B schematic cross-sectional view in Fig. 1, Fig. 5 is the C-C schematic cross-sectional view of the absorption slot in the utility model, and Fig. 6 is The D-D schematic cross-sectional view of distillation casing in the utility model.In Fig. 1 ~ Fig. 6, the bushing type I-131 of the utility model Destructive distillation absorber, including the absorption slot part and horizontally disposed distillation sleeve portion being vertically arranged；Wherein, the absorption slot Alkali liquid tank 1, water-bath tank 2, coil pipe 3 are contained in part, and distillation sleeve portion contains casing 11, distillation cascade 12, and 12 one end of distillation cascade is Horn mouth.The connection relationship of above-mentioned destructive distillation absorber is that the distillation cascade 12 is placed in casing 11,11 one end of casing and distillation The horn mouth of pipe 12 is fixedly connected, and 11 other end of casing is fixedly connected with 1 side wall of alkali liquid tank.The water-bath tank 2 is placed in lye In tank 1, coil pipe 3 is placed in water-bath tank 2.The upper end pipeline of the coil pipe 3 sequentially pass through obliquely water-bath tank 2, alkali liquid tank 1, Casing 11 pierces into distillation cascade 12 and leakproofness is fixedly connected respectively with water-bath tank 2, alkali liquid tank 1, distillation cascade 12,3 upper pipes of coil pipe There is an angle between road and horizontal line；3 lower channel of coil pipe be vertically pierced by 2 bottom center of water-bath tank and with 2 leakproofness of water-bath tank It is fixedly connected.1 top of alkali liquid tank is laterally fixedly installed the triple valve 5 being connected to, two-way valve 6 with bottom center respectively, The baffle 7 of circular ring shape is fixedly installed on 1 inner sidewall of alkali liquid tank between triple valve 5 and the top of water-bath tank 2.The water-bath tank 2 be provided with L-type charge pipe 8, water inlet pipe 9, L-type drainpipe 10, the upper end level of charge pipe 8 is pierced by 1 side wall of alkali liquid tank simultaneously It is fixedly connected with 1 leakproofness of alkali liquid tank, the lower end of charge pipe 8 is pierced by water-bath tank 2 vertically downward and fixes with 2 leakproofness of water-bath tank Connection, the lower end side-by-side horizontal of water inlet pipe 9 and drainpipe 10 through water-bath tank 2 and 1 lower part of alkali liquid tank and respectively with water-bath tank 2, 1 leakproofness of alkali liquid tank is fixedly connected, the upper port of drainpipe 10 be placed in water-bath tank 2 and with have a gap at the top of water-bath tank 2.Institute The both ends for the casing 11 stated are respectively arranged with air inlet pipe 14, exhaust pipe 15.It is equipped in 12 horn mouth of distillation cascade Plug 13 is fixedly connected below distillation cascade 12 with 11 inner wall of casing by link block.The alkali liquid tank 1 and 2 side wall of water-bath tank Be fixedly connected by link block, be provided with steel wire 4 between 2 side wall of alkali liquid tank 1 and water-bath tank, steel wire 4 and alkali liquid tank 1 and Water-bath tank 2 contacts respectively.Angle between the 3 upper end pipeline of coil pipe and horizontal line is 5 ° ~ 10 °.The casing 11 with Gap between 12 side wall of distillation cascade is 10mm ~ 20mm.The horizontal axis line of the casing 11, distillation cascade 12 is to be overlapped to set It sets；The alkali liquid tank 1, water-bath tank 2, coil pipe 3 vertical axis line be to be overlapped setting.The horizontal axis line of the casing 11 with The vertical axis line of alkali liquid tank 1 is arranged in a crossed manner.The alkali liquid tank 1, water-bath tank 2, coil pipe 3, triple valve 5, two-way valve 6, baffle 7, charge pipe 8, water inlet pipe 9, drainpipe 10, casing 11, distillation cascade 12, plug 13, air inlet pipe 14, exhaust pipe 15 and link block are equal It is made of quartz glass.The steel wire 4 is made of stainless steel.As shown in Fig. 1 ~ Fig. 6.

The part of horizontal of the casing 11 is placed in external heating furnace, is placed on distilling by being heated to about 750 DEG C Heap in pipe 12 shines TeO₂It melts the iodine -131 distillated to be included in pipe, and alkali liquid tank 1 is loaded by carrier gas.On the casing 11 14 external compressed air tank of air inlet pipe, after distillation from air inlet pipe 14 inject the compressed air of high speed and from exhaust pipe 15 Discharge, can take away rapidly high-temperature furnace body the heat of the radiant heat and distillation cascade 12 itself of distillation cascade 12 is accelerated distillation cascade 12 and Bottoms cooling built in it.The external bigeminy ball of a branch pipe of triple valve 5 on the alkali liquid tank 1, for in alkali liquid tank 1 Absorbing liquid pressurization makes it, and liquid impregnates the iodine -131 that elution is condensate in 3 inner wall of coil pipe from bottom to up, advantageously reduces the suction of iodine -131 Additional loss is lost；Another branch pipe of triple valve 5 successively external exhaust gas processing device, vacuum pump utilize vacuum pump to drive carrier gas oriented flow Through coil pipe 3, alkali liquid tank 1 and exhaust gas processing device to handle high temperature carrier gas.The bottom and side of the water-bath tank 2 with The distance between alkali liquid tank 1 is smaller, advantageously reduces the loading amount of absorbing liquid to realize high concentration Na¹³¹I production.The coil pipe 3 Upper end pipeline be arranged obliquely at a certain angle, be beneficial to prevent pressurization drive absorbing liquid from bottom to up liquid impregnate elution condensation In 3 inner wall of coil pipe absorbing liquid cover coil pipe enter distillation casing cause damages.The charge pipe 8 successively external peristaltic pump, Substance container is quantitatively adding absorbing liquid to alkali liquid tank 1 using peristaltic pump.The water inlet pipe 9, the external recirculated cooling water of drainpipe 10 Device guarantees that cooling water is quickly flowed from bottom to top to take away heat transfer of the high temperature carrier gas to absorbing liquid in water-bath tank 2.The gear The effect that plate 7 is arranged is to prevent from excessive air-flow from absorbing liquid being caused acutely to be bubbled to pour in 5 branch pipe of triple valve and lose.

In the present embodiment, angle of the upper end pipeline of the coil pipe 3 obliquely between horizontal line is 5 °.

In the present embodiment, the gap between 12 side wall of the casing 11 and distillation cascade is 10mm.

The workflow of the utility model is as follows, opens peristaltic pump for a certain amount of absorbing liquid and injects lye through charge pipe 8 In tank 1, then open cycle chilled water unit of performing fighting injects cooling water through water inlet pipe 9, at the top of water-bath tank 2 from 2 bottom of water-bath tank Be discharged through drainpipe 10, respectively in alkali liquid tank 1 absorbing liquid and coil pipe 3 cool down.Heating furnace is opened to being placed in distillation cascade Heap in 12 shines TeO₂750 DEG C are heated to about, vacuum pump pumping is opened simultaneously, the high temperature that iodine -131 steam is loaded in retort carries Coil pipe 3 of the gas through being placed in water-bath tank 2 is sent into 1 bottom of alkali liquid tank and is bubbled, and carrier gas is in coil pipe 3 in top-down flow process It is gradually cooled down, absorbing liquid of the carrier gas in contact alkali liquid tank 1, and is upward through and is immersed in absorbing liquid from 1 bottom of alkali liquid tank Steel wire 4, then during being discharged from triple valve 5, exchange to the heat and I-131 of absorbing liquid and the reaction heat of alkali all passes through heat Exchange is taken away rapidly by the cold water in water-bath tank 2, and making the temperature of absorbing liquid, the temperature remains within the normal range in entire production process or heating width It spends smaller.Distillation terminates after closing heating power supply, normal temperature compressed air is passed through from air inlet pipe 14, by high-temperature furnace body to distillation cascade 12 Heat radiation and the heat of distillation cascade 12 take away rapidly, to accelerate the cooling of distillation cascade 12 and its interior bottoms, and 12 temperature of distillation cascade closes the connection of triple valve 5 and exhaust gas processing device lower than 150 DEG C (preferably close to room temperature) afterwards, using bigeminy Liquid impregnates the iodine -131 that elution condenses in 3 inner wall of coil pipe to ball back pressure absorbing liquid from bottom to up, and then removal bigeminy ball pressure, impregnates Eluent flows back to alkali liquid tank 1, opens two-way valve 6 and the absorbing liquid in alkali liquid tank 1 is put into special glass bottle, take out bottoms And deal carefully with, realize the high yield and Na to iodine -131 steam in high temperature carrier gas¹³¹Efficient, the safety in production of I solution.

Embodiment 2

The present embodiment is identical as the structure of embodiment 1, except that the upper end pipeline of coil pipe 3 obliquely with horizontal line Between angle be 10 °, the gap between 12 side wall of casing 11 and distillation cascade be 20mm.

Claims (4)

1. bushing type I-131 destructive distillation absorber, it is characterised in that: the destructive distillation absorber includes the absorption groove portion being vertically arranged Divide and horizontally disposed distillation sleeve portion；Wherein, the absorption slot part contains alkali liquid tank (1), water-bath tank (2), coil pipe (3), distillation sleeve portion contains casing (11), distillation cascade (12), and distillation cascade (12) one end is horn mouth；Above-mentioned destructive distillation absorber Connection relationship be that the distillation cascade (12) is placed in casing (11), the horn mouth of casing (11) one end and distillation cascade (12) It is fixedly connected, casing (11) other end is fixedly connected with alkali liquid tank (1) side wall；The water-bath tank (2) is placed in alkali liquid tank (1) Interior, coil pipe (3) is placed in water-bath tank (2)；The upper end pipeline of the coil pipe (3) sequentially passes through water-bath tank (2), lye obliquely Tank (1), casing (11) pierce into distillation cascade (12) and leakproofness is fixed respectively with water-bath tank (2), alkali liquid tank (1), distillation cascade (12) Connection, has an angle between coil pipe (3) upper end pipeline and horizontal line；Coil pipe (3) lower channel is vertically pierced by water-bath tank (2) bottom Center is simultaneously fixedly connected with water-bath tank (2) leakproofness；

Laterally the triple valve (5) being connected to, two-way valve (6) are fixedly installed respectively with bottom center at the top of the alkali liquid tank (1), The baffle (7) of circular ring shape is fixedly installed on alkali liquid tank (1) inner sidewall between triple valve (5) and water-bath tank (2) top；It is described Water-bath tank (2) in be provided with the charge pipe (8) of L-type, water inlet pipe (9), L-type drainpipe (10), the upper end water of charge pipe (8) Flat to be pierced by alkali liquid tank (1) side wall and be fixedly connected with alkali liquid tank (1) leakproofness, the lower end of charge pipe (8) is pierced by water vertically downward Bath tank (2) is simultaneously fixedly connected with water-bath tank (2) leakproofness, and the lower end side-by-side horizontal of water inlet pipe (9) and drainpipe (10) runs through water Bath tank (2) and alkali liquid tank (1) lower part are simultaneously fixedly connected with water-bath tank (2), alkali liquid tank (1) leakproofness respectively, drainpipe (10) Upper port is placed in water-bath tank (2) and has a gap with water-bath tank (2) top；

The both ends of the casing (11) are respectively arranged with air inlet pipe (14), exhaust pipe (15)；Described distillation cascade (12) loudspeaker It is equipped with plug (13) in mouthful, is fixedly connected by link block with casing (11) inner wall below distillation cascade (12)；Described Alkali liquid tank (1) is fixedly connected with water-bath tank (2) side wall by link block, is arranged between alkali liquid tank (1) and water-bath tank (2) side wall Have steel wire (4), steel wire (4) contacts respectively with alkali liquid tank (1) and water-bath tank (2).

2. bushing type I-131 destructive distillation absorber according to claim 1, it is characterised in that: described coil pipe (3) upper pipes Angle between road and horizontal line is 5 ° ~ 10 °.

3. bushing type I-131 destructive distillation absorber according to claim 1, it is characterised in that: the casing (11) and steaming Evaporating the gap between pipe (12) side wall is 10mm ~ 20mm.

4. bushing type I-131 destructive distillation absorber according to claim 1, it is characterised in that: the casing (11), distillation The horizontal axis line for managing (12) is to be overlapped setting；The alkali liquid tank (1), water-bath tank (2), coil pipe (3) vertical axis line attach most importance to Close setting；The vertical axis line of the horizontal axis line of the casing (11) and alkali liquid tank (1) is arranged in a crossed manner.