CN107564600B - A kind of nuclear power plant's air cleaning unit based on low-resistance polytetrafluoroethylene (PTFE) - Google Patents
A kind of nuclear power plant's air cleaning unit based on low-resistance polytetrafluoroethylene (PTFE) Download PDFInfo
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- CN107564600B CN107564600B CN201710902867.XA CN201710902867A CN107564600B CN 107564600 B CN107564600 B CN 107564600B CN 201710902867 A CN201710902867 A CN 201710902867A CN 107564600 B CN107564600 B CN 107564600B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a kind of nuclear power plant's air cleaning units based on low-resistance polytetrafluoroethylene (PTFE), which is characterized in that including sequentially connected: air pressurized section, for increasing intake air pressure；Electric heater section reduces the relative humidity in air；Pre-filtering section, the micronic dust for being greater than 5 microns for filtering out partial size in air；High efficiency filter section includes low-resistance microporous teflon membran, the micronic dust for being greater than 0.3 micron for filtering out partial size in air；Iodine adsorption section, for adsorbing radioiodine and iodine compound in air.The windage of entire air cleaning unit can be effectively reduced in the present invention, promotes purification efficiency, and whole service life is longer.
Description
Technical field
The present invention relates to a kind of air cleaning unit, especially a kind of nuclear power plant's air based on low-resistance polytetrafluoroethylene (PTFE) is net
Makeup is set.
Background technique
Nuclear power plant is during operation and in the storage, Radiochemicals keeping and other operating process of nuclear fuel
Some harmful radioactive particles can be generated, cannot be directly discharged in atmosphere, therefore nuclear power station utilizes air cleaning system
Filtering falls these harmful radioactive substances with absorption, to protect the staff, the public and environment of plant area by radioactive pollution
And injury.
Currently, the air cleaning unit of nuclear power plant mainly includes the purification of two levels, physics mode filter is generally first passed through
Except micronic dust, iodine adsorber absorption radioiodine and iodine compound are recycled.Final stage in general physical filtering is by activity
Charcoal composition, however active carbon to filter out short grained micronic dust must size itself it is minimum, therefore not only windage is big, but also being easy will
Subtle carbon dust brings iodine adsorber into, influences the working efficiency of iodine adsorber.
Summary of the invention
The object of the present invention is to provide a kind of nuclear power plant's air cleaning units based on low-resistance polytetrafluoroethylene (PTFE).This hair
The bright windage that entire air cleaning unit can be effectively reduced promotes purification efficiency, and whole service life is longer.
Technical solution of the present invention: a kind of nuclear power plant's air cleaning unit based on low-resistance polytetrafluoroethylene (PTFE), its main feature is that,
Including sequentially connected:
Air pressurized section, for increasing intake air pressure；
Electric heater section reduces the relative humidity in air；
Pre-filtering section, the micronic dust for being greater than 5 microns for filtering out partial size in air；
High efficiency filter section includes low-resistance microporous teflon membran, micro- greater than 0.3 micron for filtering out partial size in air
Dirt；
Iodine adsorption section, for adsorbing radioiodine and iodine compound in air.
In above-mentioned nuclear power plant's air cleaning unit based on low-resistance polytetrafluoroethylene (PTFE), the filter material of the pre-filtering section is glass
Glass fibre knitting cloth, the microstructure of glass fiber woven cloth include multiple glass layers, and each glass layer is by more
A glass fiber arranged in parallel forms, 60 ° of glass fiber angle in two neighboring glass layer.
In nuclear power plant's air cleaning unit above-mentioned based on low-resistance polytetrafluoroethylene (PTFE), the low-resistance polytetrafluoroethylene (PTFE) micropore
The microstructure of film includes multiple polytetrafluoroethylene (PTFE) monofilms, and each polytetrafluoroethylene (PTFE) monofilm includes poly- the four of multiple parallel arrangements
Vinyl fluoride reinforcing rib is connected with polytetrafluoroethylene fibre between connected tetrafluoroethene reinforcing rib；Adjacent polytetrafluoroethylene (PTFE) list
The polytetrafluoroethylene (PTFE) reinforcement of film is mutually perpendicular to.
In nuclear power plant's air cleaning unit above-mentioned based on low-resistance polytetrafluoroethylene (PTFE), the low-resistance polytetrafluoroethylene (PTFE) micropore
Film the preparation method comprises the following steps:
Teflon resin powder and auxiliary agent oil are uniformly mixed into mixed powder, wherein auxiliary agent oil quality percentage is
20%, 5 hours are kept the temperature at 45 DEG C, obtain A product；
A product are put into extruder, the laminated structure being extruded into, and pass through 250 microns after calendering city thickness of thin layer
Structure, a wherein side surface for laminate structure are uniformly placed with wide 50 microns, high 150 microns of strip projected parts；
Dry, removal auxiliary agent oil, obtains B product；
B product are stretched 5 times along strip projected parts direction, obtain C product, stretching temperature is 300 DEG C；
C product are stretched 15 times along the direction perpendicular to strip projected parts, obtain D product, draft temperature is 200 DEG C；
After multiple D product are stacked, sinter molding.
Compared with prior art, by the present invention in that with the low-resistance polytetrafluoroethylene film of special construction as last one
Micronic dust filter element not only has lower windage, but also adsorption rate is higher, and the service life is longer, and will not will be in filter material
Other particles bring into next section of iodine adsorber, therefore do not interfere with the working efficiency of iodine absorption.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
Embodiment.A kind of nuclear power plant's air cleaning unit based on low-resistance polytetrafluoroethylene (PTFE), including sequentially connected:
Air pressurized section, for increasing intake air pressure；
Electric heater section reduces the relative humidity in air；
Pre-filtering section, the micronic dust for being greater than 5 microns for filtering out partial size in air；
High efficiency filter section includes low-resistance microporous teflon membran, micro- greater than 0.3 micron for filtering out partial size in air
Dirt；
Iodine adsorption section, for adsorbing radioiodine and iodine compound in air.
The filter material of the pre-filtering section is glass fiber woven cloth, and the microstructure of glass fiber woven cloth includes multiple glass
Glass fibrous layer, each glass layer is made of multiple glass fibers arranged in parallel, in two neighboring glass layer
60 ° of glass fiber angle.
The microstructure of the low-resistance microporous teflon membran includes multiple polytetrafluoroethylene (PTFE) monofilms, each polytetrafluoroethyl-ne
Alkene monofilm includes the polytetrafluoroethylene (PTFE) reinforcing rib of multiple parallel arrangements, is connected with poly- four between connected tetrafluoroethene reinforcing rib
Vinyl fluoride fiber；The polytetrafluoroethylene (PTFE) reinforcement of adjacent polytetrafluoroethylene (PTFE) monofilm is mutually perpendicular to.
The low-resistance microporous teflon membran the preparation method comprises the following steps:
Teflon resin powder and auxiliary agent oil are uniformly mixed into mixed powder, wherein auxiliary agent oil quality percentage is
20%, 5 hours are kept the temperature at 45 DEG C, obtain A product；
A product are put into extruder, the laminated structure being extruded into, and pass through 250 microns after calendering city thickness of thin layer
Structure, a wherein side surface for laminate structure are uniformly placed with wide 50 microns, high 150 microns of strip projected parts；
Dry, removal auxiliary agent oil, obtains B product；
B product are stretched 5 times along strip projected parts direction, obtain C product, stretching temperature is 300 DEG C；
C product are stretched 15 times along the direction perpendicular to strip projected parts, obtain D product, draft temperature is 200 DEG C；
After multiple D product are stacked, sinter molding.
Claims (3)
1. a kind of nuclear power plant's air cleaning unit based on low-resistance polytetrafluoroethylene (PTFE), which is characterized in that including sequentially connected:
Air pressurized section, for increasing intake air pressure；
Electric heater section reduces the relative humidity in air；
Pre-filtering section, the micronic dust for being greater than 5 microns for filtering out partial size in air；
High efficiency filter section includes low-resistance microporous teflon membran, the micronic dust for being greater than 0.3 micron for filtering out partial size in air；
The microstructure of the low-resistance microporous teflon membran includes multiple polytetrafluoroethylene (PTFE) monofilms, and each polytetrafluoroethylene (PTFE) monofilm is equal
Polytetrafluoroethylene (PTFE) reinforcing rib comprising multiple parallel arrangements is connected with polytetrafluoroethyl-ne between connected polytetrafluoroethylene (PTFE) reinforcing rib
Alkene fiber；The polytetrafluoroethylene (PTFE) reinforcing rib of adjacent polytetrafluoroethylene (PTFE) monofilm is mutually perpendicular to；
Iodine adsorption section, for adsorbing radioiodine and iodine compound in air.
2. nuclear power plant's air cleaning unit according to claim 1 based on low-resistance polytetrafluoroethylene (PTFE), it is characterised in that: institute
The filter material for stating pre-filtering section is glass fiber woven cloth, and the microstructure of glass fiber woven cloth includes multiple glass layers,
Each glass layer is made of multiple glass fibers arranged in parallel, the glass fibre in two neighboring glass layer
60 ° of angle of silk.
3. nuclear power plant's air cleaning unit according to claim 1 based on low-resistance polytetrafluoroethylene (PTFE), which is characterized in that institute
State low-resistance microporous teflon membran the preparation method comprises the following steps:
Teflon resin powder and auxiliary agent oil are uniformly mixed into mixed powder, wherein auxiliary agent oil quality percentage is
20%, 5 hours are kept the temperature at 45 DEG C, obtain A product；
A product are put into extruder, are extruded into laminated structure, and by being rolled into thick 250 microns of the laminate structure of thickness,
A wherein side surface for laminate structure is uniformly placed with wide 50 microns, high 150 microns of strip projected parts；
Dry, removal auxiliary agent oil, obtains B product；
B product are stretched 5 times along strip projected parts direction, obtain C product, draft temperature is 300 DEG C；
C product are stretched 15 times along the direction perpendicular to strip projected parts, obtain D product, draft temperature is 200 DEG C；
After multiple D product are stacked, sinter molding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710902867.XA CN107564600B (en) | 2017-09-29 | 2017-09-29 | A kind of nuclear power plant's air cleaning unit based on low-resistance polytetrafluoroethylene (PTFE) |
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| CN201710902867.XA CN107564600B (en) | 2017-09-29 | 2017-09-29 | A kind of nuclear power plant's air cleaning unit based on low-resistance polytetrafluoroethylene (PTFE) |
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| CN107564600A CN107564600A (en) | 2018-01-09 |
| CN107564600B true CN107564600B (en) | 2019-06-21 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2522350A1 (en) * | 1982-02-26 | 1983-09-02 | Poelman Sofiltra | INSTALLATION OF PRESSURIZATION AND FILTRATION, IN PARTICULAR FOR PROTECTING PERSONS FROM THE EFFECTS OF NUCLEAR, BIOLOGICAL OR CHEMICAL WEAPONS |
| CN102658038A (en) * | 2012-04-10 | 2012-09-12 | 杭州洁弗膜技术有限公司 | Preparation method of sub-high efficiency polytetrafluoroethylene (PTFE) micro-porous film and film lamination material |
| CN103764251A (en) * | 2011-08-31 | 2014-04-30 | 大金工业株式会社 | Filter medium for air filter, air filter unit, and method for producing filter medium for air filter |
| CN103827591A (en) * | 2011-05-24 | 2014-05-28 | 菲利普·普雷奥 | Improved apparatus for filtering and disinfecting ambient air |
| CN104043347A (en) * | 2014-04-30 | 2014-09-17 | 桐乡市健民过滤材料有限公司 | Low-resistance wear-resistance teflon microporous membrane and preparation method |
-
2017
- 2017-09-29 CN CN201710902867.XA patent/CN107564600B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2522350A1 (en) * | 1982-02-26 | 1983-09-02 | Poelman Sofiltra | INSTALLATION OF PRESSURIZATION AND FILTRATION, IN PARTICULAR FOR PROTECTING PERSONS FROM THE EFFECTS OF NUCLEAR, BIOLOGICAL OR CHEMICAL WEAPONS |
| CN103827591A (en) * | 2011-05-24 | 2014-05-28 | 菲利普·普雷奥 | Improved apparatus for filtering and disinfecting ambient air |
| CN103764251A (en) * | 2011-08-31 | 2014-04-30 | 大金工业株式会社 | Filter medium for air filter, air filter unit, and method for producing filter medium for air filter |
| CN102658038A (en) * | 2012-04-10 | 2012-09-12 | 杭州洁弗膜技术有限公司 | Preparation method of sub-high efficiency polytetrafluoroethylene (PTFE) micro-porous film and film lamination material |
| CN104043347A (en) * | 2014-04-30 | 2014-09-17 | 桐乡市健民过滤材料有限公司 | Low-resistance wear-resistance teflon microporous membrane and preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 核电厂空气净化机组出厂及现场试验;罗伟涛,叶剑云;《洁净与空调技术》;20141231;第2014年卷(第3期);全文，尤其是第85页第1节 |
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| CN107564600A (en) | 2018-01-09 |
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