CN114345067A - Comprehensive airborne radioactive purification system - Google Patents
Comprehensive airborne radioactive purification system Download PDFInfo
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- CN114345067A CN114345067A CN202111671807.4A CN202111671807A CN114345067A CN 114345067 A CN114345067 A CN 114345067A CN 202111671807 A CN202111671807 A CN 202111671807A CN 114345067 A CN114345067 A CN 114345067A
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- 230000002285 radioactive effect Effects 0.000 title claims abstract description 137
- 238000000746 purification Methods 0.000 title claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000000889 atomisation Methods 0.000 claims abstract description 44
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 37
- 239000011630 iodine Substances 0.000 claims abstract description 37
- 238000001914 filtration Methods 0.000 claims abstract description 26
- 238000010521 absorption reaction Methods 0.000 claims abstract description 18
- 238000007791 dehumidification Methods 0.000 claims abstract description 15
- 238000001179 sorption measurement Methods 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 4
- 238000005202 decontamination Methods 0.000 claims 9
- 230000003588 decontaminative effect Effects 0.000 claims 9
- 239000000941 radioactive substance Substances 0.000 abstract description 10
- 230000005855 radiation Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 125
- 239000007789 gas Substances 0.000 description 78
- 238000009833 condensation Methods 0.000 description 11
- 230000005494 condensation Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 6
- 230000001502 supplementing effect Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 3
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 2
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 229910052805 deuterium Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052722 tritium Inorganic materials 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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Images
Classifications
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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
- B01D53/002—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 by condensation
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- 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
- B01D53/26—Drying gases or vapours
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/02—Treating gases
Abstract
The application relates to a comprehensive airborne radioactive purification system, which belongs to the technical field of radiation protection of nuclear power stations and comprises an atomization absorption module, a dehumidification module and a filtering module which are sequentially connected; the atomization absorption module comprises a solution tank and an atomization nozzle, the atomization nozzle is connected with an air-borne radioactive gas pipeline, and the atomization nozzle is also connected with a supercharger which pumps the solution in the solution tank into the atomization nozzle and mixes the solution with the air-borne radioactive gas; the dehumidification module comprises a water eliminator communicated with the solution tank, an evaporator and a condenser which are communicated with each other through a compressor, and the evaporator is connected with the water eliminator; the filtration module includes that the iodine that is connected with the condenser adsorbs the purification branch road, and the iodine adsorbs the purification branch road including the first primary filter, iodine adsorber, high efficiency filter and the first centrifugal fan that communicate in proper order. The airborne radioactive component treatment system can treat airborne radioactive components of air, reduce the content of airborne radioactive substances in the air, reduce the number of times and time of personnel site treatment operation, and guarantee personnel safety.
Description
Technical Field
The application relates to the technical field of radiation protection of nuclear power stations, in particular to a comprehensive airborne radioactive purification system.
Background
The nuclear power station can generate airborne radioactive substances such as radioactive aerosol, radioactive iodine, radioactive inert gas, radioactive isotope deuterium and tritium and the like during operation. Once inhaled by the human body, the substances can cause serious internal irradiation injury and seriously threaten the health of workers. Therefore, the nuclear power station generally adopts a ventilation system of a nuclear island plant to reduce the concentration of airborne radioactive gas inside the plant, and the ventilation system can adopt an iodine adsorber to perform filtration treatment when discharging to the external environment so as to reduce the damage to the environment.
At present, the bubbling method is internationally used as a means for filtering the airborne radioactive gas in the future, and the airborne radioactive substance in the airborne radioactive gas is dissolved in water by bubbling, and the substance which is difficult to dissolve in water is added with a relevant solvent, so that the difficult-to-dissolve nuclide is dissolved in the solution. Although the filtration efficiency of the iodine adsorption filtration treatment adopted for the nuclear island ventilation of the nuclear power station is high, the following defects still exist:
for example, the iodine adsorption and purification device has a large volume, the filter is easy to damp when the air humidity is large, the filter is easy to damp to influence normal use, the filter needs to be replaced periodically, the personal safety of personnel is threatened, and the like, and the automation degree is not high. Therefore, the invention reasonably designs a comprehensive airborne radioactive purification system, improves the purification efficiency and the automation degree and has important significance.
Disclosure of Invention
The embodiment of the application provides a comprehensive airborne radioactive purification system to solve the problem that in the related art, an iodine adsorption purification device is easy to be affected by damp and needs to be replaced regularly, and personal safety of personnel is threatened.
The embodiment of the application provides a nature gas carries radioactivity clean system, includes: the device comprises an atomization absorption module, a dehumidification module and a filtering module which are sequentially connected along the flowing direction of airborne radioactive gas;
the atomization absorption module comprises a solution tank and an atomization nozzle positioned in the solution tank, the atomization nozzle is connected with an air-borne radioactive gas pipeline, and the atomization nozzle is also connected with a supercharger which pumps the solution in the solution tank into the atomization nozzle and mixes the solution with the air-borne radioactive gas;
the dehumidification module comprises a water eliminator communicated with the solution tank, an evaporator and a condenser which are communicated with each other through a compressor, and the evaporator is connected with the water eliminator so as to enable the radioactive gas carried by the gas exhausted from the water eliminator to enter the evaporator for liquefaction;
the filtration module includes that the iodine that is connected with the condenser adsorbs the purification branch road, the iodine adsorbs the purification branch road including first primary filter, iodine adsorber, high efficiency filter and the first centrifugal fan that communicates in proper order.
In some embodiments: the atomizing spray head is provided with an air-borne radioactive gas inlet connected with an air-borne radioactive gas pipeline, an air regulator is arranged on the air-borne radioactive gas pipeline, and an air pipeline communicated with a water stopper is arranged at the top of the solution tank.
In some embodiments: the solution tank is provided with a solution outlet, and a first stop valve, a Y-shaped filter and a second stop valve are sequentially connected between the solution outlet and the supercharger through a solution pipeline;
the atomizer is equipped with the solution import, connect gradually third stop valve, check valve and pressure regulating valve through solution pipeline between the solution import of booster and atomizer.
In some embodiments: the solution tank is further provided with a solution supplementing pipeline, a solution drainage pipeline and a solution overflow pipeline, the solution supplementing pipeline is connected with a fourth stop valve, the solution drainage pipeline is connected with a fifth stop valve, the height of a water inlet of the solution overflow pipeline is lower than that of the atomizing spray head, and the solution overflow pipeline is connected with a sixth stop valve.
In some embodiments: the top of the solution tank is provided with an exhaust pipe, the exhaust pipe is connected with an exhaust valve, the bottoms of the water retainer and the evaporator are both provided with a water condensation disc, and the bottom of the water condensation disc is provided with a water condensation pipe for enabling liquid in the water condensation disc to flow into the solution tank.
In some embodiments: an expansion valve is connected between the evaporator and the condenser, and the evaporator, the compressor, the condenser and the expansion valve are sequentially connected to form a circulation loop for circulating a refrigerant, so that the airborne radioactive gas exhausted by the water eliminator enters the evaporator and is condensed into aqueous solution, and the airborne radioactive gas entering the condenser through the evaporator is heated and dried.
In some embodiments: the filtration module includes the bypass branch road of being connected with the condenser, the bypass branch road is equipped with the conversion valve of being connected with the condenser with the entry that iodine adsorbs the purification branch road, the bypass branch road includes interconnect's second primary filter and second centrifugal fan.
In some embodiments: and a sensor for detecting the concentration of the airborne radioactive gas is arranged at an outlet of the condenser and is connected with the conversion valve through a controller, so that the bypass branch is opened when the concentration of the airborne radioactive gas is lower than a set threshold value.
In some embodiments: the atomizing spray heads in the solution tank are arranged in a plurality, and the plurality of atomizing spray heads are arrayed or circumferentially and uniformly distributed in the solution tank.
In some embodiments: the water outlet of the atomizing nozzle faces upwards.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a comprehensive airborne radioactive purification system, which is provided with an atomization absorption module, a dehumidification module and a filtering module which are sequentially connected along the flowing direction of airborne radioactive gas, wherein the atomization absorption module comprises a solution tank and an atomization nozzle positioned in the solution tank, the atomization nozzle is connected with an airborne radioactive gas pipeline, and the atomization nozzle is also connected with a supercharger which pumps solution in the solution tank into the atomization nozzle and mixes the solution with the airborne radioactive gas; the dehumidification module comprises a water eliminator communicated with the solution tank, an evaporator and a condenser which are communicated with each other through a compressor, and the evaporator is connected with the water eliminator; the filtration module includes that the iodine that is connected with the condenser adsorbs the purification branch road, and the iodine adsorbs the purification branch road including the first primary filter, iodine adsorber, high efficiency filter and the first centrifugal fan that communicate in proper order.
Therefore, the comprehensive airborne radioactive purification system of the application firstly dissolves airborne radioactive substances in the airborne radioactive gas into a solution through the atomization absorption module, and reduces the content of the airborne radioactive substances in the airborne radioactive gas. The dehumidification module is used for drying and dehumidifying the solution contained in the airborne radioactive gas processed by the atomization absorption module, condensing the airborne radioactive gas containing the solution into aqueous solution and reducing the moisture content of the airborne radioactive gas. The filtering module is used for further processing substances such as radioactive particles, nuclide iodine and the like in the airborne radioactive gas processed by the dehumidifying module. The system can treat the airborne radioactive components of the air and reduce the content of the airborne radioactive substances in the air. The solution can be automatically supplemented and discharged, the automation level is improved, the field treatment of personnel is reduced, and the safety of the personnel is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a block diagram of the structure of an embodiment of the present application.
Reference numerals:
1. a solution tank; 2. an atomizing spray head; 3. a supercharger; 4. a pressure regulating valve; 5. an air conditioner; 6. a sixth stop valve; 7. a fifth stop valve; 8. a fourth stop valve; 9. a first shut-off valve; 10. a Y-type filter; 11. a second stop valve; 12. a third stop valve; 13. a check valve; 14. an exhaust valve; 15. a water eliminator; 16. an evaporator; 17. a condenser; 18. a compressor; 19. an expansion valve; 20. a water condensation tray; 21. a first primary filter; 22. an iodine adsorber; 23. a high efficiency filter; 24. a switching valve; 25. a second primary filter; 26. a first centrifugal fan; 27. a second centrifugal fan; 28. an air line; 29. a condensate pipe; 30. a solution replenishing line; 31. a solution drainage line; 32. a solution overflow line; 33. an atomization absorption module; 34. a dehumidification module; 35. a filtration module; 36. an airborne radioactive gas pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a comprehensive airborne radioactive purification system, which can solve the problems that in the related art, an iodine adsorption purification device is easy to be affected by damp and is normally used, and needs to be replaced periodically and threatens the personal safety of personnel.
Referring to fig. 1, an embodiment of the present application provides an integrated airborne radioactive purification system, including: the device comprises an atomization absorption module 33, a dehumidification module 34 and a filtering module 35 which are sequentially connected along the flowing direction of the airborne radioactive gas. The atomization absorption module 33 is used for absorbing substances which are difficult to dissolve in water and easy to dissolve in water in the airborne radioactive gas; the dehumidification module 34 is used for removing moisture in the airborne radioactive gas; the filtering module 35 is used for filtering the nuclide iodine with longer half-life period in the absorption of the airborne radioactive gas.
Specifically, the atomization absorption module 33 includes a solution tank 1 and an atomization nozzle 2 located in the solution tank 1, the atomization nozzle 2 is connected with an airborne radioactive gas pipeline 36, and the airborne radioactive gas pipeline 36 is used for connecting an air source of airborne radioactive gas. The atomizing nozzle 2 is also connected with a supercharger 3 which pumps the solution in the solution tank 1 into the atomizing nozzle 2 and mixes the solution with the airborne radioactive gas. The gas-carried radioactive gas enters the atomizing nozzle 2 through the gas-carried radioactive gas pipeline 36 and is atomized into the solution tank 1 together with the solution. The main purpose of atomizing the airborne radioactive gas pipeline 36 and the solution is to make the airborne radioactive gas pipeline 36 fully contact with the solution, so that the water vapor containing radioactive aerosol, radioactive isotope deuterium and tritium in the airborne radioactive gas pipeline 36 is dissolved in the solution, and the composition of the solution is determined according to the composition of the airborne radioactive substance.
The dehumidification module 34 includes a water barrier 15 communicating with the solution tank 1, and an evaporator 16 and a condenser 17 communicating with each other through a compressor 18. The water stopper 15 is used to trap large water droplets formed by the atomized air discharged from the solution tank 1 to reduce the moisture content in the airborne radioactive gas. The evaporator 16 is connected with the water stopper 15, so that the radioactive gas carried by the gas discharged from the water stopper 15 enters the evaporator 16 to be condensed and liquefied, and the moisture content in the radioactive gas carried by the gas is further reduced. The gas-carried radioactive gas condensed and liquefied from the evaporator 16 enters a condenser 17 to be heated and dried, and the moisture content in the gas-carried radioactive gas is further reduced.
In some alternative embodiments: referring to fig. 1, the embodiment of the present application provides an integrated airborne radioactive purification system, in which an atomizing nozzle 2 of the integrated airborne radioactive purification system is provided with an airborne radioactive gas inlet connected with an airborne radioactive gas pipeline 36, an air regulator 5 for regulating the flow rate of the airborne radioactive gas entering the atomizing nozzle 2 is arranged on the airborne radioactive gas pipeline 36, and the air regulator 5 is preferably, but not limited to, an electric controller. An air pipeline 28 communicated with the water baffle 15 is arranged at the top of the solution tank 1, and the atomizing air in the solution tank 1 automatically enters the water baffle 15 from the air pipeline 28 along with the increase of the air pressure in the solution tank 1.
In some alternative embodiments: referring to fig. 1, the embodiment of the present application provides a comprehensive airborne radioactive purification system, a solution outlet is arranged at the bottom of a solution tank 1 of the comprehensive airborne radioactive purification system, and a first stop valve 9, a Y-type filter 10 and a second stop valve 11 are sequentially connected between the solution outlet and a supercharger 3 through a solution pipeline. The first and second shut-off valves 9, 11 are used to open and close the solution line between the first outlet and the booster 3. The Y-filter 10 is used to filter impurities in the solution flowing out of the solution tank 1.
The atomizer 2 is provided with a solution inlet, and a third stop valve 12, a check valve 13 and a pressure regulating valve 4 are sequentially connected between the supercharger 3 and the solution inlet of the atomizer 2 through a solution pipeline. The third stop valve 12 is used for opening and closing the on-off of the solution pipeline between the supercharger 3 and the solution inlet of the atomizer 2, the pressure regulating valve 4 is used for regulating the flow speed and flow of the solution between the supercharger 3 and the solution inlet of the atomizer 2, and the check valve 13 is used for enabling the solution in the solution tank 1 to flow into the atomizer 2 in a one-way manner to prevent the solution from flowing back.
In some alternative embodiments: referring to fig. 1, the embodiment of the present application provides an integrated airborne radioactive purification system, and the solution tank 1 of the integrated airborne radioactive purification system is further provided with a solution supplement pipeline 30, a solution drainage pipeline 31 and a solution overflow pipeline 32. The solution supplementing pipeline 30 is connected with a fourth stop valve 8, the solution drainage pipeline 31 is connected with a fifth stop valve 7, the height of a water inlet of the solution overflow pipeline 32 is lower than that of the atomizing nozzle 2, and the solution overflow pipeline 32 is connected with a sixth stop valve 6.
The solution supplementing pipeline 30 is used for automatically supplementing solution into the solution tank 1, the fourth stop valve 8 is used for controlling the on-off of the solution supplementing pipeline 30, and the fourth stop valve 8 is preferably but not limited to an electric control valve, so that the solution can be automatically supplemented into the solution tank 1. The solution drainage pipeline 31 is used for discharging the solution in the solution tank 1, the fifth stop valve 7 is used for controlling the on-off of the solution drainage pipeline 31, and the fifth stop valve 7 is preferably, but not limited to, an electric control valve, so that the solution can be automatically drained from the solution tank 1. The solution overflow pipeline 32 is used for controlling the liquid level height of the solution in the solution tank 1, the sixth stop valve 6 is used for controlling the on-off of the solution overflow pipeline 32, and the solution overflow pipeline 32 is preferably, but not limited to, an electric control valve, so that the automatic adjustment of the liquid level height of the solution in the solution tank 1 is realized.
In some alternative embodiments: referring to fig. 1, in the embodiment of the present application, an exhaust pipe is disposed at the top of a solution tank 1 of the comprehensive airborne radioactive purification system, an exhaust valve 14 is connected to the exhaust pipe, and after the solution tank 1 is filled with a solution, air in the closed solution tank 1 is automatically exhausted through the exhaust valve 14. The water retaining device 15 and the evaporator 16 are provided with a water condensation disc 20 at the bottom, and the water condensation disc 20 is provided with a water condensation pipe 29 at the bottom for leading the liquid in the water condensation disc 20 to flow into the solution tank 1. After the airborne radioactive gas flows out of the water stopper 15 and the evaporator 16, most of the solution vapor in the airborne radioactive gas is condensed into an aqueous solution, enters the water condensation tray 20, and then flows back into the solution tank 1 through the water condensation pipe 29 under the action of gravity.
In some alternative embodiments: referring to fig. 1, the embodiment of the present application provides an integrated airborne radioactive purification system, in which an expansion valve 19 is further connected between an evaporator 16 and a condenser 17. The evaporator 16, the compressor 18, the condenser 17 and the expansion valve 19 are sequentially connected to form a circulation loop for circulating a refrigerant, so that the airborne radioactive gas exhausted by the water eliminator 15 enters the evaporator 16 and is condensed into an aqueous solution, and the airborne radioactive gas entering the condenser 17 through the evaporator 16 is heated and dried.
The evaporator 16, the compressor 18, the condenser 17 and the expansion valve 19 are sequentially connected to form a circulation loop for circulating the refrigerant, the refrigerant in the circulation loop is continuously compressed and expanded, so that the surface temperature of the evaporator 16 is lower, the surface temperature of the condenser 17 is higher, and after the airborne radioactive gas passing through the water retaining device 15 enters the surface of the evaporator 16, most of solution vapor in the airborne radioactive gas is condensed into aqueous solution, enters the water condensing disc 20 and then flows back to the solution tank 1 through the water condensing pipe 29 under the action of gravity. The air passing through the evaporator 16 enters the condenser 17 to be heated, the airborne radioactive gas is further dried to reduce the humidity of the air, and then the air at the outlet of the condenser 17 enters the filtering module 35.
In some alternative embodiments: referring to fig. 1, the filtering module 35 of the comprehensive airborne radioactive purification system comprises a bypass branch connected with the condenser 17, the inlets of the bypass branch and the iodine adsorption purification branch are provided with a switching valve 24 connected with the condenser 17, and the bypass branch comprises a second primary filter 25 and a second centrifugal fan 27 which are connected with each other. At the outlet of the condenser 17 there is a sensor (not shown) for detecting the concentration of airborne radioactive gas, said sensor being connected to the changeover valve 24 via a controller (not shown) to open said bypass branch if the concentration of airborne radioactive gas is below a set threshold value.
This application embodiment has two branches at filter module 35 inside, a branch road is iodine adsorption purification branch road, another branch road is the bypass branch road, two branch roads are through the switching valve 24 switching operation, when the radioactive dose level is still very high in the airborne radioactive gas that gets into filter module 35, switching valve 24 switches to iodine adsorption purification branch road operation, airborne radioactive gas passes through first primary filter 21 successively, discharge through first centrifugal fan 26 behind iodine adsorber 22 and the high efficiency filter 23, airborne radioactive gas passes through the processing of iodine adsorption purification branch road, further filter and absorb substances such as radioactive particle, nuclide iodine in the airborne radioactive gas. When the airborne radioactive dose level in the airborne radioactive gas entering the filtering module 35 is low, the switching valve 24 is switched to the bypass branch for operation, and at this time, the airborne radioactive gas passes through the second primary filter 25 and is discharged through the second centrifugal fan 27.
In some alternative embodiments: referring to fig. 1, the embodiment of the application provides a comprehensive airborne radioactive purification system, atomization spray heads 2 in a solution tank 1 of the comprehensive airborne radioactive purification system are provided with a plurality of atomization spray heads, specific number of the atomization spray heads 2 is specifically set according to actual needs, the atomization spray heads 2 are arrayed or circumferentially and uniformly arranged in the solution tank 1, water outlets of the atomization spray heads 2 face upwards, and solution sprayed out of the atomization spray heads 2 can be mixed with airborne radioactive gas again in the falling process.
Principle of operation
The embodiment of the application provides a comprehensive airborne radioactive purification system, and the comprehensive airborne radioactive purification system is provided with an atomization absorption module 33, a dehumidification module 34 and a filtering module 35 which are sequentially connected along the flow direction of airborne radioactive gas, wherein the atomization absorption module 33 comprises a solution tank 1 and an atomization nozzle 2 positioned in the solution tank 1, the atomization nozzle 2 is connected with an airborne radioactive gas pipeline 36, and the atomization nozzle 2 is further connected with a supercharger 3 which pumps the solution in the solution tank 1 into the atomization nozzle 2 to be mixed with the airborne radioactive gas; the dehumidification module 34 includes an water stopper 15 communicating with the solution tank 1, and an evaporator 16 and a condenser 17 communicating with each other through a compressor 18, the evaporator 16 being connected to the water stopper 15; the filtration module 35 includes an iodine adsorption purification branch connected with the condenser 17, and the iodine adsorption purification branch includes a first primary filter 21, an iodine adsorber 22, a high efficiency filter 23 and a first centrifugal fan 26 which are sequentially communicated.
Therefore, the comprehensive airborne radioactive purification system of the present application first dissolves airborne radioactive substances in the airborne radioactive gas into a solution through the atomization absorption module 33, so as to reduce the content of the airborne radioactive substances in the airborne radioactive gas. The dehumidifying module 34 is configured to dry and dehumidify the solution contained in the airborne radioactive gas processed by the atomizing and absorbing module 33, condense the airborne radioactive gas containing the solution into an aqueous solution, and reduce the moisture content of the airborne radioactive gas. The filtering module 35 is used for further processing substances such as radioactive particles, nuclide iodine, and the like in the airborne radioactive gas processed by the dehumidifying module 34. The system can treat the airborne radioactive components of the air and reduce the content of the airborne radioactive substances in the air. The solution can be automatically supplemented and discharged, the automation level is improved, the field treatment of personnel is reduced, and the safety of the personnel is guaranteed.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An integrated airborne radioactive purification system, comprising: the atomizing absorption module (33), the dehumidification module (34) and the filtering module (35) are sequentially connected along the flowing direction of the airborne radioactive gas;
the atomization absorption module (33) comprises a solution tank (1) and an atomization nozzle (2) positioned in the solution tank (1), the atomization nozzle (2) is connected with an airborne radioactive gas pipeline (36), and the atomization nozzle (2) is also connected with a supercharger (3) which pumps the solution in the solution tank (1) into the atomization nozzle (2) and mixes the solution with the airborne radioactive gas;
the dehumidification module (34) comprises a water baffle (15) communicated with the solution tank (1), and an evaporator (16) and a condenser (17) which are communicated with each other through a compressor (18), wherein the evaporator (16) is connected with the water baffle (15) so as to enable the radioactive gas carried by the gas discharged from the water baffle (15) to enter the evaporator (16) for liquefaction;
filtration module (35) include the iodine adsorption purification branch road of being connected with condenser (17), the iodine adsorption purification branch road is including first primary filter (21), iodine adsorber (22), high efficiency filter (23) and first centrifugal fan (26) that communicate in proper order.
2. An integrated airborne radioactive decontamination system according to claim 1, wherein:
the atomizing spray head (2) is provided with an air-borne radioactive gas inlet connected with an air-borne radioactive gas pipeline (36), an air regulator (5) is arranged on the air-borne radioactive gas pipeline (36), and an air pipeline (28) communicated with a water stopper (15) is arranged at the top of the solution tank (1).
3. An integrated airborne radioactive decontamination system according to claim 1, wherein:
the solution tank (1) is provided with a solution outlet, and a first stop valve (9), a Y-shaped filter (10) and a second stop valve (11) are sequentially connected between the solution outlet and the supercharger (3) through a solution pipeline;
atomizer (2) are equipped with the solution import, have connected gradually third stop valve (12), check valve (13) and pressure regulating valve (4) through the solution pipeline between the solution import of booster (3) and atomizer (2).
4. An integrated airborne radioactive decontamination system according to claim 1, wherein:
solution case (1) still is equipped with solution and replenishes pipeline (30), solution drainage pipe way (31) and solution overflow pipeline (32), be connected with fourth stop valve (8) on solution replenishment pipeline (30), be connected with fifth stop valve (7) on solution drainage pipe way (31), the water inlet height of solution overflow pipeline (32) is less than the height of atomizer (2), be connected with sixth stop valve (6) on solution overflow pipeline (32).
5. An integrated airborne radioactive decontamination system according to claim 1, wherein:
the top of solution tank (1) is equipped with the blast pipe, be connected with discharge valve (14) on the blast pipe, the bottom of manger (15) and evaporimeter (16) all is equipped with water condensing disc (20), the bottom of water condensing disc (20) is equipped with condensate pipe (29) in flowing into solution tank (1) with the liquid in water condensing disc (20).
6. An integrated airborne radioactive decontamination system according to claim 1, wherein:
an expansion valve (19) is further connected between the evaporator (16) and the condenser (17), the evaporator (16), the compressor (18), the condenser (17) and the expansion valve (19) are sequentially connected to form a circulation loop for circulating a refrigerant, so that airborne radioactive gas exhausted from the water eliminator (15) enters the evaporator (16) and is condensed into water solution, and the airborne radioactive gas entering the condenser (17) through the evaporator (16) is heated and dried.
7. An integrated airborne radioactive decontamination system according to claim 1, wherein:
filtration module (35) include the bypass branch road of being connected with condenser (17), bypass branch road and iodine adsorption purify the entry of branch road and be equipped with conversion valve (24) of being connected with condenser (17), the bypass branch road includes interconnect's second primary filter (25) and second centrifugal fan (27).
8. An integrated airborne radioactive decontamination system according to claim 7, wherein:
and a sensor for detecting the concentration of the airborne radioactive gas is arranged at an outlet of the condenser (17), and the sensor is connected with a conversion valve (24) through a controller so as to open the bypass branch when the concentration of the airborne radioactive gas is lower than a set threshold value.
9. An integrated airborne radioactive decontamination system according to claim 1, wherein:
a plurality of atomizing spray heads (2) in the solution tank (1) are arranged, and the plurality of atomizing spray heads (2) are arrayed or circumferentially and uniformly distributed in the solution tank (1).
10. An integrated airborne radioactive decontamination system according to claim 1 or 9, wherein:
the water outlet of the atomizing nozzle (2) faces upwards.
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| CN202111671807.4A CN114345067A (en) | 2021-12-31 | 2021-12-31 | Comprehensive airborne radioactive purification system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111671807.4A CN114345067A (en) | 2021-12-31 | 2021-12-31 | Comprehensive airborne radioactive purification system |
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