CN113577974B - Radon removing and purifying method and device - Google Patents
Radon removing and purifying method and device Download PDFInfo
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- CN113577974B CN113577974B CN202110859477.5A CN202110859477A CN113577974B CN 113577974 B CN113577974 B CN 113577974B CN 202110859477 A CN202110859477 A CN 202110859477A CN 113577974 B CN113577974 B CN 113577974B
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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
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/18—Noble gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/416—Further details for adsorption processes and devices involving cryogenic temperature treatment
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drying Of Gases (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses a radon removing and purifying method and device, which are used for solving the problems that the prior art is difficult to effectively remove unbound radon in the air and the overall treatment efficiency is not ideal. Firstly, filtering radon daughter carried by aerosol from input air to be purified to obtain primarily purified air; then drying the primarily purified air to remove water; and then the physical refrigeration and adsorption are carried out on the dried air by utilizing the principles of cold trap segregation and low-temperature adsorption, so as to obtain the fully purified air. The invention breaks through the traditional radon removal purification design thought, removes non-bound radon polluted by larger radiation dose by utilizing the physical property of radon and through cold trap segregation and low-temperature adsorption, and simultaneously removes radon in the bound state by utilizing dust removal and filtration, thereby removing radon in the air more quickly and efficiently.
Description
Technical Field
The invention relates to the technical field of air purification, in particular to a method and a device for removing radon pollution in air.
Background
Radon is a colorless and odorless inert gas produced by radium decay in nature. Radon has three natural radioisotopes Rn219, rn220, rn222, of which 222Rn is the most important and longest life, with a half-life of 3.82 days. In a standard state, the radon density is 9.73kg/m3; the liquefaction point at standard atmospheric pressure was-62℃and the freezing point was-71 ℃. Radon is one of 19 important carcinogens published by the world health organization, and the radiation of radon is far greater than the sum of other radioactive hazards in life, and the incubation period for inducing lung cancer is more than 15 years. The radon atoms spontaneously decay into charged radon daughter, attach to aerosol in the air, enter the human body and stay and deposit in respiratory tract and lung. According to the recommendations of the International Commission on radiation protection (ICRP) and the conditions of various countries, the radon protection standard of some national buildings is generally 20000Bq/m3, and the radon protection standard of WHO is 100Bq/m 3. In 2015, the country issued "indoor radon and daughter control requirements (GB/T16146-2015), and originally newly built house indoor radon concentration standard 200Bq/m3 was reduced to 100Bq/m 3.
The radon concentration mean value range of the underground engineering in cities and areas of China is 9.8Bq/m 3-1808.0 Bq/m3; radon and daughter concentration in underground engineering is far higher than that in ground engineering, radon level in few engineering even reaches uranium ore limit value (3700 Bq/m 3), and is nearly 10 times higher than general standard (400 Bq/m 3); the radon pollution condition of national defense engineering is serious, and certain measurement statistics show that the average radon concentration is 2702Bq/m3.
Radon pollution in underground works is mainly due to radon precipitation from surrounding rocks and soil through diffusion, convection and infiltration of groundwater carrying radon. Radon pollution in the underground engineering environment is about 1-2 orders of magnitude higher than that of ground buildings, and the health of internal staff is seriously threatened.
Therefore, reducing indoor radon concentration, improving air quality and protecting the health of residents are always important points of research at home and abroad. The radon content in the engineering is reduced by adopting a reasonable method, and the method has important significance for guaranteeing the physical health of the fighter and enhancing the internal environment guaranteeing capability of the national defense engineering.
Common radon reduction techniques include pollution source control techniques, ventilation techniques, air purification techniques, and the like.
The technology for controlling pollution sources is commonly used in radon isolation measures of national defense engineering buildings, and mainly solves the problems of convection and diffusion of radon into the engineering, such as adopting a radon diffusion preventing enclosure structure;
the reinforced ventilation is the most economical and effective method for reducing radon pollution in underground engineering, and the lower limit of radon-proof ventilation rate of the underground engineering is about 0.3 times/h to 1.0 times/h.
The air purifying radon-reducing method mainly removes dust or particles attached to radon daughter in the air by a dust removing method, thereby indirectly achieving the purpose of radon-reducing and radon-removing. At present, purification methods considered to be relatively effective are: fiber filtration purification technology, adsorption purification technology and electrostatic dust collection technology. Among them, the use of an air filter combining a HEPA filter and an activated carbon filter is a viable method for reducing radon levels, such as HEPA-grade HEPA filters (mainly trapping particles above 0.5 um) combined with coconut fiber activated carbon mesh technology with 90% of the micropores having a pore size below 2nm modified with activated alumina by molecular sieves; the electrostatic dust removal technology is to remove particulate pollutants in air by utilizing the principle of high-voltage electrostatic adsorption, for example, the dual-field high-voltage electrostatic mode is adopted to adsorb the particulate matters smaller than 10nm to 100 nm; in addition, there is a compound electrostatic technology including electrostatic cyclone dust collection, electrostatic bag compound dust collection, electrostatic filter screen dust collection, etc., which combines different dust collection mechanisms with the electrostatic dust collection mechanism to make them act together, further improving efficiency.
Short lived radon daughter in the environment is usually in both bound and unbound forms, with bound radon daughter being bound to the aerosol in the environment and unbound radon daughter being present in the form of single atoms or clusters. The unconjugated radon daughter is easy to deposit on the upper respiratory tract due to small particle size and strong diffusivity, and the unit exposure dose is far higher than that of the conjugated radon daughter.
Aiming at the bound radon daughter, the radon-reducing technology can indirectly achieve the aim of reducing radon by carrying out long-time treatment on dust or particles attached with the radon daughter; however, for unconjugated radon, the radon-reducing technique is difficult to be used, and more relies on enhanced ventilation; and the overall treatment efficiency of the radon reduction technique is still not ideal.
Disclosure of Invention
Therefore, the embodiment of the invention provides a radon removing and purifying method and device, which are used for solving the problems that the prior art is difficult to effectively remove unbound radon in the air and the overall treatment efficiency is not ideal.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
In a first aspect, a radon-removing purification method comprises:
Filtering radon body carried by aerosol from the input air to be purified to obtain primarily purified air;
drying the primarily purified air to remove water;
And the dried air is subjected to physical refrigeration and adsorption by utilizing the principles of cold trap segregation and low-temperature adsorption, so that the fully purified air is obtained.
In a second aspect, a radon-removing purification device for implementing the method comprises a low-temperature heat-insulating container, and an aerosol filter, an air compressor unit, a molecular sieve dryer, a heat regenerator and a low-temperature adsorber which are sequentially communicated through pipelines;
the low-temperature heat-insulating container is used for providing a low-temperature environment capable of condensing radon; the heat regenerator adopts a countercurrent type dividing wall heat exchange structure and comprises a cooling channel and a rewarming channel which are isolated from each other; the heat regenerator and the low-temperature absorber are both arranged in the low-temperature heat insulation container;
The input air to be purified is subjected to the pressurization by the air compressor set after radon daughter carried by aerosol is removed by the aerosol filter, and then is dried by the molecular sieve dryer to remove water; the dried compressed air passes through a cooling channel of the heat regenerator and then passes through the low-temperature adsorber to finish air purification in a pipeline; and the purified air is discharged after passing through the reheating channel of the heat regenerator.
Optionally, an air return throttle valve is further arranged on the output pipeline of the hot end of the heat regenerator.
Optionally, the heat regenerator adopts a coiled tube type heat exchanger, a plate type heat exchanger or a plate-fin type heat exchanger, and the heat exchange temperature difference of the hot end is controlled to be 1-10 ℃.
Optionally, the low-temperature adsorber adopts activated carbon, zeolite or alumina molecular sieve.
Optionally, a segregation cylinder is further arranged at the bottom of the cooling channel of the heat regenerator and is used as a branch of the channel between the heat regenerator and the low-temperature absorber.
Optionally, the cryogenic insulation vessel employs liquid nitrogen as a cooling medium.
Optionally, the device further comprises a refrigerator and a secondary refrigerant storage tank, wherein the refrigerator, the secondary refrigerant storage tank and the low-temperature heat-insulating container are sequentially communicated through pipelines to form a closed refrigeration cycle.
Optionally, the aerosol filter can filter radon bodies carried by aerosol with the diameter of more than 1 mu m, and the exhaust pressure of the air compressor unit is 0.2-1.4 MPa.
Optionally, the molecular sieve dryer has a plurality of groups, and the molecular sieve dryer is sequentially connected in series.
Optionally, the molecular sieve dryer adopts 5A molecular sieve of aluminosilicate crystal, so that the moisture content in the air is reduced to 5-15 ppm.
The invention has at least the following beneficial effects:
The invention breaks through the traditional radon removal purification design thought, removes non-bound radon polluted by larger radiation dose based on the principles of cold trap segregation and low-temperature adsorption by utilizing the physical property of radon, simultaneously removes radon in air more quickly and efficiently by utilizing the radon daughter in a bound state through dust removal and filtration, and can realize the purification level below 100Bq/m 3 (the national standard radon concentration is 200Bq/m 3) in a short time.
The device has the characteristics of simple structure, high reliability, long life cycle, high purification efficiency and the like. Compared with the traditional schemes of static electricity, fiber filtration, room temperature adsorption and the like, the method can effectively and quickly solve the problem of environmental radon pollution, can meet the radon concentration control standard of underground engineering, and can also meet the radon reduction requirements of toxin filtration and ventilation isolation in the war. The device is also suitable for occasions requiring radon removal in ground buildings and the like except underground engineering.
Drawings
In order to more clearly illustrate the prior art and the present invention, the drawings used in the description of the prior art and the embodiments of the present invention will be briefly described. It will be apparent to those skilled in the art that the drawings in the following description are merely exemplary and that other drawings may be derived from the drawings provided without the inventive effort to those skilled in the art.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, for example, modifications, variations in proportions, or otherwise, used in the practice of the invention, which are particularly adapted to specific environments without departing from the spirit and scope of the invention.
FIG. 1 is a schematic diagram of one embodiment of the radon removal purification method of the present invention.
FIG. 2 is a schematic diagram of an embodiment of a radon-removing purifying device of the present invention.
FIG. 3 is a schematic view of another embodiment of the radon-removing purifying device of the present invention.
Reference numerals illustrate:
1. the device comprises an aerosol filter 2, an air compressor unit 3, a molecular sieve dryer 4, a heat regenerator 4a, a segregation cylinder 5, a low-temperature adsorber 6, a low-temperature heat insulation container (which can be vacuum), 7, an air return throttle valve 8, a secondary refrigerant storage tank 9 and a low-temperature refrigerator.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed but may include other steps or elements not expressly listed but inherent to such process, method, article, or apparatus or steps or elements that may be added based on a further optimization of the inventive concept.
As shown in fig. 1, a radon-removing purifying method comprises the following steps:
S100, filtering radon daughter carried by aerosol from the input air to be purified to obtain primarily purified air;
s200, drying the primarily purified air to remove water;
s300, performing physical refrigeration on the dried air, and removing non-bound radon through cold trap segregation and low-temperature adsorption to obtain fully purified air.
Therefore, not only is the bound radon daughter filtered in a conventional treatment mode used, but also the physical property of radon is particularly utilized, and the non-bound radon polluted by larger radiation dose is removed through cold trap segregation and low-temperature adsorption, so that the radon in the air is removed in a more rapid and efficient mode, and the overall treatment efficiency is remarkably improved.
As shown in fig. 2, the radon-removing purifying device comprises a low-temperature heat-insulating container 6, an aerosol filter 1, an air compressor unit 2, a molecular sieve dryer 3, a heat regenerator 4 and a low-temperature adsorber 5 which are sequentially communicated through pipelines; wherein the cryogenic insulation vessel 6 is used to provide a low temperature environment capable of condensing radon; the heat regenerator 4 adopts a countercurrent type dividing wall heat exchange structure and comprises a cooling channel and a rewarming channel which are isolated from each other; the heat regenerator 4 and the low-temperature absorber 5 are both arranged in the low-temperature heat insulation container 6; the input air to be purified is subjected to pressurization by an air compressor unit 2 after radon daughter carried by aerosol is removed by an aerosol filter 1, and is dried by a molecular sieve dryer 3 to remove water; the dried compressed air passes through a cooling channel of the heat regenerator and then passes through the low-temperature adsorber to finish air purification in a pipeline; and the purified air is discharged after passing through the reheating channel of the heat regenerator.
The bottom of the cooling channel of the heat regenerator can be provided with a segregation cylinder which is used as a branch of the channel between the heat regenerator and the low-temperature absorber. In this way, condensate (containing liquid radon) is collected by the segregation cylinder, also avoiding liquid material from entering the cryogenic adsorber.
An air return throttle valve 7 can be arranged on the output pipeline of the hot end of the heat regenerator 4, so that the purified air is decompressed and returned to the space to be purified, and one-time purification cycle is completed.
Liquid nitrogen can be injected into the low-temperature heat insulating container 6 as a cooling medium, so that the regenerator 4 and the low-temperature absorber 5 can be provided with conditions of cold trap segregation and low-temperature adsorption.
The molecular sieve dryer 3 has two, switchable and renewable molecular sieve dryers.
The embodiment utilizes the physical property of radon to realize low-temperature adsorption through the low-temperature adsorber (radon daughter is easier to adsorb in a low-temperature environment); and because of being compressed air, when the radon daughter concentration in the air is higher, cold trap segregation can be realized through the heat regenerator.
The device has the characteristics of simple structure, high reliability, long life cycle, high purification efficiency and the like. Compared with the traditional schemes of static electricity, fiber filtration, room temperature adsorption and the like, the method can effectively and quickly solve the problem of environmental radon pollution, can meet the radon concentration control standard of underground engineering, and can also meet the radon reduction requirements of toxin filtration and ventilation isolation in the war. The device is also suitable for occasions requiring radon removal in ground buildings and the like except underground engineering.
By utilizing the principle of cold trap segregation and low-temperature adsorption, radon in the air can be efficiently and rapidly treated, the radon concentration of underground engineering radon which is far higher than the ground can be reduced to below the national standard radon concentration of 200 Bq/m 3 from 2000 to 4000Bq/m 3, the problem of threat of the underground engineering radon to human health can be effectively solved, and the problem of interference of radon emission background in scientific research environments such as dark matter detection can be effectively solved.
As shown in FIG. 3, another radon-removing purification device adds a closed refrigeration cycle based on the embodiment shown in FIG. 2. This embodiment is described in further detail below.
The aerosol filter can effectively filter radon bodies carried by aerosol with the diameter of more than 1-5 um, and adopts a multi-layer composite glass fiber filter structure or a sintered metal wire felt, wool felt, active carbon fiber filter, a metal wire mesh, electrostatic dust collection and other structures;
The air compressor unit has an exhaust pressure of 0.2-1.4 MPa, and can adopt lubricating oil type piston type, screw type or vortex type compression, and a high-efficiency oil separation structure is needed at the moment, so that the oil content in the compressed air is 1-10 ppmW, and oil-free compressors can also be adopted, including a dry type screw compressor and a magnetic suspension centrifugal type high-speed compressor;
the switchable molecular sieve dryer can effectively remove moisture in air, the water content is reduced to 5-15 ppm, the switchable regeneration function is realized, and the molecular sieve material is generally 5A molecular sieve of aluminosilicate crystal;
The heat regenerator can adopt a coiled tube type heat exchanger, a plate type heat exchanger or a plate-fin type heat exchanger, the temperature difference of heat exchange at the hot end is controlled to be 1-10 ℃, and a segregation cylinder (serving as a branch of a passage between the heat regenerator and a low-temperature absorber) is arranged at the bottom of the heat regenerator, so that the cold trap segregation separation function is realized when radon content is high; the working principle of the heat regenerator is that the countercurrent dividing wall type heat exchange of cold and hot air flows is utilized to gradually rewire the low-temperature air flow flowing out of the low-temperature adsorber, which is called cold recovery; meanwhile, the gradual cooling of the air flow entering the low-temperature adsorber is realized, so that the temperature of the air flow after passing through the low-temperature adsorber is maintained without obvious change.
The low-temperature heat-insulating container can be made of perlite and polyurethane heat-insulating materials, and can also be made of high-vacuum heat insulation.
The low-temperature adsorber can be in the form of an adsorbent bed (also in a closed structure), the adsorption temperature can be between 18 ℃ below zero and 196 ℃ below zero, the adsorbent can be activated carbon, zeolite or alumina molecular sieve, and the regeneration temperature is 200-350 ℃.
The cryocooler is used for maintaining the low-temperature environment of the adsorbent of the cryoadsorber, and can be cooled by liquid nitrogen directly; where liquid nitrogen is not allowed to evaporate into the space, a closed refrigerant cycle may be employed. In fig. 3, the long and short horizontal lines represent the level of coolant. The refrigerator can generally adopt evaporative refrigeration, and comprises a compressor, an evaporator, a condenser, a throttle valve and a refrigerating agent circulating pump.
The radon removing and purifying device can be also provided with a safety valve, a process valve, a temperature sensor, a pressure sensor, a radon measuring instrument and the like.
The purification steps are as follows: the indoor air to be purified enters an air compressor unit through a composite air inlet aerosol filter to be pressurized, and at the moment, a part of radon daughter in a combined state is effectively removed; after the air is pressurized, drying is carried out by a switchable dryer to remove water; the dry compressed air enters a low-temperature adsorber through a heat regenerator, and radon segregation or adsorption is realized by utilizing the principle of cold trap segregation and the low-temperature adsorption principle; the purified air is reheated by the heat regenerator, and the incoming flow and the return air flow are not mixed as the heat regenerator performs dividing wall type heat exchange, and the air is decompressed by the return air throttle valve to return to the space to be purified, so that one-time purification cycle is completed. The secondary refrigerant (comprising liquid nitrogen) for cooling the adsorption beds is cooled by a refrigerator to realize closed circulation, or liquid nitrogen is directly used for evaporating and cooling under the condition that the refrigerator is not used.
The device utilizes the physical property of radon, removes non-bound radon polluted by larger radiation dose through cold trap segregation and low-temperature adsorption, and simultaneously removes radon in air in a more rapid and efficient way by utilizing the radon daughter in a dust removal and filtration bound state, so that the purification level below 100Bq/m <3 > can be realized in a short time.
Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.
The application has been described above with particularity and detail in connection with general description and specific embodiments. It should be noted that it is obvious that several variations and modifications can be made to these specific embodiments without departing from the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (7)
1. The radon-removing purifying device is characterized by comprising a low-temperature heat-insulating container, an aerosol filter, an air compressor unit, a molecular sieve dryer, a heat regenerator and a low-temperature adsorber which are sequentially communicated through pipelines; the exhaust pressure of the air compressor unit is 0.2-1.4 MPa;
The low-temperature heat-insulating container is used for providing a low-temperature environment capable of condensing radon; the heat regenerator adopts a countercurrent type dividing wall heat exchange structure and comprises a cooling channel and a rewarming channel which are isolated from each other; the heat regenerator and the low-temperature absorber are both arranged in the low-temperature heat insulation container; the bottom of the cooling channel of the heat regenerator is also provided with a segregation cylinder which is used as a branch of the channel between the heat regenerator and the low-temperature adsorber and is used for collecting condensate containing liquid radon and preventing liquid substances from entering the low-temperature adsorber; the output pipeline of the rewarming channel of the heat regenerator is also provided with a return air throttle valve;
The input air to be purified is subjected to the pressurization by the air compressor set after radon daughter carried by aerosol is removed by the aerosol filter, and then is dried by the molecular sieve dryer to remove water; the dried compressed air passes through a cooling channel of the heat regenerator and then passes through the low-temperature adsorber to finish air purification in a pipeline; and the purified air is discharged after passing through the reheating channel of the heat regenerator.
2. The radon-removing purification device according to claim 1, wherein the heat regenerator adopts a coiled tube type heat exchanger, a plate type heat exchanger or a plate fin type heat exchanger, and the temperature difference of hot end heat exchange is controlled to be 1-10 ℃.
3. The radon-removing purification device according to claim 1, wherein said low-temperature adsorber is activated carbon, zeolite or alumina molecular sieve.
4. The radon-removing purification device according to claim 1, wherein said low-temperature heat-insulating container uses liquid nitrogen as a cooling medium.
5. The radon-removal purification device according to claim 1 or 4, further comprising a refrigerator and a coolant storage tank, wherein said refrigerator, coolant storage tank and low temperature insulation container are sequentially connected by a pipeline to form a closed refrigeration cycle.
6. The radon removal purification device of claim 1, wherein said aerosol filter is adapted to filter out radon daughter carried by more than 1 μm aerosol.
7. The radon-removing purification device according to claim 1, wherein the molecular sieve dryers are provided with a plurality of groups which are sequentially connected in series; the molecular sieve dryer adopts 5A molecular sieve of aluminosilicate crystal, so that the moisture content in the air is reduced to 5-15 ppm.
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| CN116779204A (en) * | 2022-03-07 | 2023-09-19 | 浙江军康科技有限公司 | A radon gas purification method and device |
| CN116928784A (en) * | 2022-04-06 | 2023-10-24 | 浙江军康科技有限公司 | Adsorption and desorption regenerated radon gas purifying method and device |
| CN115015503A (en) * | 2022-05-30 | 2022-09-06 | 中国海洋大学 | Ocean radon in-situ measurement device and measurement method |
| CN114935196B (en) * | 2022-06-07 | 2023-07-11 | 南华大学 | Air radon removing device and method based on liquid paraffin oil |
| CN117225133A (en) * | 2022-06-08 | 2023-12-15 | 台州军康环境工程技术有限公司 | A method and device for continuous separation of radon gas by lithium molecular sieve |
| CN120101263A (en) * | 2025-04-01 | 2025-06-06 | 东莞市利安达环境科技有限公司 | Intelligent analysis of radon reduction, purification and disinfection device |
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