JPH0310061B2 - - Google Patents
Info
- Publication number
- JPH0310061B2 JPH0310061B2 JP57165281A JP16528182A JPH0310061B2 JP H0310061 B2 JPH0310061 B2 JP H0310061B2 JP 57165281 A JP57165281 A JP 57165281A JP 16528182 A JP16528182 A JP 16528182A JP H0310061 B2 JPH0310061 B2 JP H0310061B2
- Authority
- JP
- Japan
- Prior art keywords
- silver zeolite
- gas
- filter
- zeolite
- filled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910021536 Zeolite Inorganic materials 0.000 claims description 50
- 239000010457 zeolite Substances 0.000 claims description 50
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 49
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 41
- 229910052709 silver Inorganic materials 0.000 claims description 41
- 239000004332 silver Substances 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 229910052740 iodine Inorganic materials 0.000 claims description 20
- 239000011630 iodine Substances 0.000 claims description 20
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 18
- 238000001179 sorption measurement Methods 0.000 claims description 18
- 239000003463 adsorbent Substances 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 43
- 229910052799 carbon Inorganic materials 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000000274 adsorptive effect Effects 0.000 description 2
- 150000002496 iodine Chemical class 0.000 description 2
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000005264 electron capture Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- -1 that is Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Examining Or Testing Airtightness (AREA)
- Separation Of Gases By Adsorption (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、銀ゼオライトを充填したフイルタの
リーク検出方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for detecting leakage in a filter filled with silver zeolite.
原子力発電所などの原子力プラントにおいて
は、環境保全の立場から、放射性ガス、特に放射
性ヨウ素の放出を防止するために、除去効率99％
以上の高性能なヨウ素除去フイルタが設置されて
いる。
In nuclear power plants such as nuclear power plants, removal efficiency of 99% is required to prevent the release of radioactive gases, especially radioactive iodine, from the standpoint of environmental protection.
The above high-performance iodine removal filters are installed.
このヨウ素除去フイルタの性能を維持するため
には、高性能なヨウ素吸着材を用いることは言う
までもないが、高性能なヨウ素吸着材を用いた場
合でも、装置化の際に、吸着材の充填層に空隙な
いし薄層部が存在したり、フイルタ枠やガスケツ
トなどにバイパスリーク路が存在すると、フイル
タ装置全体の性能が低下する。そのため、ヨウ素
除去フイルタの設置時および設置後に定期的にリ
ーク検査をする必要がある。そして、このヨウ素
除去フイルタには吸着材として添着炭が用いら
れ、そのリーク検出には添着炭に物理吸着するフ
レオンが用いられていた。 In order to maintain the performance of this iodine removal filter, it goes without saying that a high-performance iodine adsorbent must be used. If there are voids or thin layer parts in the filter, or if there are bypass leak paths in the filter frame or gasket, the performance of the entire filter device will deteriorate. Therefore, it is necessary to periodically perform leakage tests during and after installing the iodine removal filter. Impregnated carbon is used as an adsorbent in this iodine removal filter, and freon, which physically adsorbs to the impregnated carbon, is used for leak detection.
一方、近年、ヨウ素除去フイルタに従来の添着
炭に替わる高性能、長寿命のヨウ素吸着材として
銀ゼオライトを用いる試みがなされている。しか
し、銀ゼオライトを充填したヨウ素除去フイルタ
のリーク検出にフレオンを用いる場合には、通常
の大気条件におけるフレオンの吸着力が小さいた
め、フイルタの出口濃度が高くなり、フイルタの
リーク検出は不可能であつた。 On the other hand, in recent years, attempts have been made to use silver zeolite as a high-performance, long-life iodine adsorbent in place of conventional impregnated carbon in iodine removal filters. However, when freon is used to detect leaks in an iodine removal filter filled with silver zeolite, the adsorption power of freon is small under normal atmospheric conditions, so the concentration at the outlet of the filter becomes high, making it impossible to detect leaks from the filter. It was hot.
本発明は、銀ゼオライトを吸着材とするヨウ素
除去フイルタのリーク検出を物理吸着性物質のガ
スを用いて実施可能とすることを目的とするもの
である。
An object of the present invention is to enable leak detection of an iodine removal filter using silver zeolite as an adsorbent using a gas of a physically adsorptive substance.
本発明は銀ゼオライトを吸着材として充填して
なるヨウ素除去フイルタのリークを検出する方法
において、前記銀ゼオライトの凝縮性ガスに対す
る吸着活性を有する細孔が残存する状態で物理吸
着性物質のガスを通気させることを特徴とするも
のである。
The present invention provides a method for detecting leakage in an iodine removal filter filled with silver zeolite as an adsorbent, in which the gas of a physically adsorptive substance is absorbed in a state in which the pores of the silver zeolite that have adsorption activity for condensable gas remain. It is characterized by ventilation.
本発明は、銀ゼオライトを吸着材とするヨウ素
除去フイルタのリーク検出にフレオンを用いる場
合に、フレオンの吸着力の低下する原因が、銀ゼ
オライトに凝縮性ガスである水蒸気が吸着すると
フレオンの吸着サイトがうずめられてしまうこと
に基づいている点を明らかにし、その影響の排除
には、例えば、銀ゼオライト１ｇ当り、凝縮性ガ
スの吸着量が凝縮液体として0.11cm3（水の場合
0.11ｇ）以下、又は銀ゼオライト吸着材に通気す
るガス中の凝縮性ガスの蒸気圧Ｐに対する凝縮性
ガスの飽和蒸気圧Psの比Ｐ／Psを0.2以下にして、
その影響を排除してフレオンによるリーク検出を
可能ならしめたものである。 The present invention discloses that when Freon is used to detect leaks in an iodine removal filter that uses silver zeolite as an adsorbent, the cause of the decrease in the adsorption power of Freon is that when water vapor, which is a condensable gas, is adsorbed to silver zeolite, the Freon adsorption site For example, the amount of condensable gas adsorbed as a condensed liquid is 0.11 cm 3 per 1 g of silver zeolite (in the case of water)
0.11g) or less, or the ratio P/Ps of the saturated vapor pressure Ps of the condensable gas to the vapor pressure P of the condensable gas in the gas vented to the silver zeolite adsorbent is 0.2 or less,
This eliminates this influence and makes it possible to detect leaks using freons.
以下、検討結果について説明する。 The study results will be explained below.
ヨウ素吸着材として用いられる銀ゼオライト
は、結晶性のゼオライトNa2O：Al2O3：
mSiO2：nH2O（ここで、ｍ、ｎはゼオライトの
タイプによつて決まる値で、Ｘタイプの場合に
は、ｍ＝2.5±0.5、ｎ＝6.2〜８である。）をベー
スとし、このベースのNaをAgと置き換えたもの
である。ゼオライトはこのように、NaをAgなど
の他の金属と置換することができるのが大きな特
徴の一つで、種々の置換品が触媒などに広く用い
られているが、他の大きな特徴として、ゼオライ
ト中に結晶水として取り込まれた水が乾燥などで
除去された後の孔が均一な孔径を有している点が
あげられる。この孔は、細孔で、フレオンガスな
ど種々のガスの吸着サイトとなるが、孔径が小さ
く（Åオーダー）、均一であるため吸着ガスの分
子径によつて吸着性が異なり、所謂、分子ふるい
（モレキユラー・シーブ）として作用する。 Silver zeolite used as an iodine adsorbent is a crystalline zeolite Na 2 O: Al 2 O 3 :
Based on mSiO 2 :nH 2 O (where m and n are values determined by the type of zeolite; in the case of X type, m = 2.5 ± 0.5, n = 6.2 to 8), In this base, Na is replaced with Ag. One of the major features of zeolite is that Na can be replaced with other metals such as Ag, and various substituted products are widely used in catalysts, etc., but another major feature is that One point is that the pores have a uniform pore diameter after the water incorporated into the zeolite as crystal water is removed by drying or the like. These pores are pores that serve as adsorption sites for various gases such as Freon gas, but because the pore diameter is small (on the order of Å) and uniform, the adsorption properties vary depending on the molecular diameter of the adsorbed gas, and are called molecular sieves ( acts as a molecular sieve).
銀ゼオライトによるヨウ素除法は、ヨウ素を化
学的に固定するAgをゼオライトのNaとの置換性
を利用して、ゼオライト上に添着して行なわれ
る。そして、リーク検出に用いられるフレオンの
吸着は、結晶水の除去された後の孔の吸着性を利
用して行なわれる。しかし、結晶水が除去された
後の孔は、種々の凝縮性ガスを吸着するため、凝
縮性ガスが多量に存在する場合には孔がうずめら
れてしまい、フレオンガ吸着されなくなる。特
に、凝縮性のガスが水蒸気である場合には、例え
ば、一般大気中に水蒸気が多量に含まれている場
合には、ゼオライト中にも水蒸気が吸着されて結
晶水として強固に吸着される。従つて、一般大気
中でヨウ素除去フイルタのリーク検出を行なうこ
とはできない。 The iodine removal method using silver zeolite is carried out by impregnating Ag, which chemically fixes iodine, onto zeolite by taking advantage of the zeolite's ability to replace Na. Freon adsorption used for leak detection is performed by utilizing the adsorption properties of the pores after the crystal water has been removed. However, since the pores after the crystal water is removed adsorb various condensable gases, if a large amount of condensable gases are present, the pores are filled up and Freon gas is no longer adsorbed. In particular, when the condensable gas is water vapor, for example when the general atmosphere contains a large amount of water vapor, the water vapor is also adsorbed in the zeolite and is strongly adsorbed as water of crystallization. Therefore, leak detection of the iodine removal filter cannot be performed in the general atmosphere.
そこで、銀ゼオライトに対する凝縮性ガスの吸
着性を、水蒸気について実験的に求めた、第１図
はその結果を示すもので、横軸には雰囲気中の水
蒸気圧（Ｐ）／飽和水蒸気圧（Ps）が、縦軸に
は銀ゼオライトに対する水の平衡吸着量（cm3水／
ｇ吸着材）が示してあり、Ａは銀ゼオライトの場
合を示し、Ｂは比較のために添着炭の場合を示
し、Ｃが発電所内雰囲気の範囲を示している。銀
ゼオライトに対する水の平衡吸着量はＰ／Psが
大きくなると共に増加する傾向にあるが、Ｐ／
Psが0.2までは急激な増加、0.2以上ではゆるやか
な増加になつている。このＰ／Psが0.2以下の吸
水は、ゼオライトの持つÅオーダーの細孔、すな
わち、吸着活性を有する細孔における水の吸着で
あるため、Ｐ／Psが0.2以上の場合は、種々のガ
スの吸着サイトとなる細孔が水でうずめられて、
他のガスが吸着されなくなることを示しており、
この結果、フレオンなどの他のガスを吸着させる
ためには、凝縮性ガスのＰ／Psが0.2以下すなわ
ち、第１図のＤの範囲内になるように、換言すれ
ば、水の吸着量が0.11cm3／ｇ（0.11水／ｇ吸着
材）以下となるように調整すれば良いことにな
る。 Therefore, the adsorption of condensable gases on silver zeolite was experimentally determined for water vapor. Figure 1 shows the results. The horizontal axis shows the water vapor pressure in the atmosphere (P)/saturated water vapor pressure (Ps ), but the vertical axis shows the equilibrium adsorption amount of water on silver zeolite (cm 3 water/
A shows the case of silver zeolite, B shows the case of impregnated carbon for comparison, and C shows the range of the atmosphere inside the power plant. The equilibrium adsorption amount of water on silver zeolite tends to increase as P/Ps increases;
There is a rapid increase when Ps reaches 0.2, and a gradual increase when Ps exceeds 0.2. This water absorption with P/Ps of 0.2 or less is water adsorption in the pores of the Å order of zeolite, that is, pores with adsorption activity, so when P/Ps is 0.2 or more, various gases are absorbed. The pores that serve as adsorption sites are filled with water,
This indicates that other gases are no longer adsorbed,
As a result, in order to adsorb other gases such as freon, the P/Ps of the condensable gas must be 0.2 or less, that is, within the range of D in Figure 1. In other words, the amount of water adsorbed must be It is sufficient to adjust the amount to 0.11 cm 3 /g (0.11 water/g adsorbent) or less.
以下、実施例について説明する。 Examples will be described below.
第２図は一実施例を実施する装置のフローを示
すもので、１はヨウ素フイルタハウジング、２は
ヒーター、３は銀ゼオライト充填フイルタ、４は
フレオン発生器、５はフレオン濃度測定器で、ヨ
ウ素フイルタハウジング１中の処理ガスの入口側
にヒーター２が、処理ガスの出口側に銀ゼオライ
ト充填フイルタ３が設置され、またヨウ素フイル
タハウジング１中の上流側にはフレオン発生器４
からの配管が接続され、さらに銀ゼオライト充填
フイルタ３の上流側および下流側からフレオン濃
度測定器５につながる配管が接続されている。 Figure 2 shows the flow of an apparatus for carrying out one embodiment, in which 1 is an iodine filter housing, 2 is a heater, 3 is a silver zeolite-filled filter, 4 is a Freon generator, and 5 is a Freon concentration meter. A heater 2 is installed on the inlet side of the processing gas in the filter housing 1, a silver zeolite-filled filter 3 is installed on the outlet side of the processing gas, and a Freon generator 4 is installed on the upstream side of the iodine filter housing 1.
Further, piping leading to the Freon concentration measuring device 5 is connected from the upstream and downstream sides of the silver zeolite-filled filter 3.
この装置のリーク検出を行うには、処理ガスを
ヨウ素フイルタハウジング１内に流し、ヒーター
２によつて処理ガスを後述する(2)式に則つて加熱
してＰ／Psを0.2以下とする。このままの状態で、
所定の時間、例えば、銀ゼオライトが吸水してい
ない場合は０、銀ゼオライトが0.11ｇ／ｇ吸着材
まで吸水している場合には約10時間程度通気した
後、フレオン発生器４から空気などのキヤリアガ
スとともにフレオンを導入する。導入が安定する
のを待つて、銀ゼオライト充填フイルタ３の上流
側と下流側から通気ガスの一部をフレオン濃度測
定器５に導き、フレオンの濃度を測定し、下式に
よつてリーク率を算出する。 To detect leaks in this device, the processing gas is flowed into the iodine filter housing 1, and the processing gas is heated by the heater 2 according to equation (2), which will be described later, so that P/Ps is 0.2 or less. In this state,
After aeration for a predetermined period of time, for example, 0 if the silver zeolite has not absorbed water, or approximately 10 hours if the silver zeolite has absorbed water up to 0.11g/g adsorbent, air etc. is released from the Freon generator 4. Freon will be introduced along with carrier gas. After waiting for the introduction to stabilize, a portion of the ventilation gas is introduced into the Freon concentration measuring device 5 from the upstream and downstream sides of the silver zeolite-filled filter 3, the Freon concentration is measured, and the leak rate is calculated using the following formula. calculate.
リーク率（％）＝フイルタ出口濃度／フイルタ入口濃度
×100……(1)
フレオン濃度測定器５としてはECD（電子捕獲
検出器）付ガスクロマトグラフが好適である。Leak rate (%)=filter outlet concentration/filter inlet concentration×100 (1) As the Freon concentration measuring device 5, a gas chromatograph with an ECD (electron capture detector) is suitable.
次に、処理ガスの加熱条件を、水蒸気圧と温度
との関係を用いて説明する。第３図は水蒸気圧と
温度との関係を示すもので、横軸、縦軸には、そ
れぞれ、温度（℃）、水蒸気圧（mmHg）が示して
あり、Ｐ／Ps＝１、0.7、0.5の場合が示してあ
る。例えば、処理ガスが30℃でＰ／Psが0.5の条
件（発電所内一般雰囲気の平均値）であつた場合
には、処理ガスが30℃、Ｐ／Ps＝0.5の場合の水
蒸気圧は16mmHgであるから、これをＰ／Ps＝0.2
以下とするようなPsは80mmHg以上となる。そし
て、Psを80mmHg以上にするためには、47℃以
上、すなわち、温度上昇がΔTが17℃以上になる
ように加熱すればよいことになる。また、処理ガ
スが30℃、Ｐ／Ps＝0.7の条件（発電所内一般雰
囲気最大値）の場合は、同様に算出すると必要な
温度上昇ΔTは23℃以上となり、その他の場合も
同様な手順で算出できる。 Next, the heating conditions for the processing gas will be explained using the relationship between water vapor pressure and temperature. Figure 3 shows the relationship between water vapor pressure and temperature. The horizontal and vertical axes show temperature (℃) and water vapor pressure (mmHg), respectively, and P/Ps = 1, 0.7, 0.5 The case is shown. For example, if the processing gas is 30°C and P/Ps = 0.5 (average value of the general atmosphere inside the power plant), the water vapor pressure is 16 mmHg when the processing gas is 30°C and P/Ps = 0.5. Since there is, this is P/Ps=0.2
The following Ps is 80mmHg or more. In order to make Ps 80 mmHg or more, heating should be performed at 47° C. or higher, that is, the temperature rise is such that ΔT is 17° C. or higher. In addition, if the processing gas is 30℃ and P/Ps = 0.7 (maximum general atmosphere inside the power plant), the required temperature rise ΔT will be 23℃ or more if calculated in the same way.In other cases, the same procedure can be used. It can be calculated.
この必要な温度上昇ΔTを得るための最小のヒ
ーター容量は、下式で算出できる。 The minimum heater capacity to obtain this required temperature rise ΔT can be calculated using the formula below.
Ｗ〔kJ／ｓ、kW〕
＝0.92〔kJ／m3℃〕×ΔT〔℃〕×Ｆ〔m3／ｈ〕／360
0
＝2.5×10-4、ΔT・Ｆ ……(2)
ここで、Ｗはヒーター容量、0.92〔kJ／m3℃〕
は空気の比熱、Ｆは処理ガスの流量である。W [kJ/s, kW] = 0.92 [kJ/m 3 ℃] × ΔT [℃] × F [m 3 /h] / 360
0 = 2.5×10 -4 , ΔT・F ...(2) Here, W is the heater capacity, 0.92 [kJ/m 3 ℃]
is the specific heat of air, and F is the flow rate of the processing gas.
(2)式を用いると、通気ガスの条件が30℃、Ｐ／
Ps＝0.5の場合にはＷ＝4.25×10-3F、30℃、Ｐ／
Ps＝0.7の場合にはＷ＝5.75×10-3Fとなる。 Using equation (2), the ventilation gas conditions are 30℃, P/
When Ps=0.5, W=4.25×10 -3 F, 30℃, P/
When Ps=0.7, W=5.75×10 -3 F.
従つて、この方法を用いて、処理ガスを加熱す
れば、Ｐ／Ps＝0.2以下とすることができるので、
従来この条件を満足せず、実施できなかつた銀ゼ
オライトを充填したフイルタのフレオンによるリ
ーク検出が可能となる。 Therefore, if the processing gas is heated using this method, P/Ps can be set to 0.2 or less.
It becomes possible to detect leaks from a filter filled with silver zeolite using freon, which has not been possible in the past because this condition was not satisfied.
前述の実施例においては、処理ガスの温度を上
げてＰ／Psを低下させたが、前段に除湿器を設
置しても同様の効果を得ることができる。なお、
銀ゼオライトの湿度低減用のガスの流路を別途に
設けてフイルタのリーク検出の必要な時にはこの
流路からの通気によつて銀ゼオライトの湿度低減
を行なつてもよい。また、銀ゼオライトは一度乾
燥したものは、0.11ｇ／ｇ吸着材まで吸水するの
には、少なくとも３時間以上かかるので、あらか
じめ乾燥処理をしておけば、通気ガスの性状に関
係なく、吸水するまでの間にフレオンによるリー
ク検出を行うことができる。この乾燥処理とは、
Ｐ／Ps＝0.2以下のガスを流すこと、あるいはオ
ーブン等による乾燥を言う。なお、通常市販の銀
ゼオライトは約400℃で乾燥されているので、そ
のまま使用すれば、何等の操作なしに最初のリー
ク検出は行うことができる。 In the above embodiment, the temperature of the processing gas was raised to lower P/Ps, but the same effect can be obtained even if a dehumidifier is installed at the front stage. In addition,
A gas flow path for reducing the humidity of the silver zeolite may be provided separately, and when it is necessary to detect leakage from the filter, the humidity of the silver zeolite may be reduced by ventilation from this flow path. In addition, once dried, silver zeolite takes at least 3 hours to absorb water up to 0.11g/g adsorbent, so if you dry it in advance, it will absorb water regardless of the properties of the ventilation gas. Leak detection using freon can be performed during this period. This drying process is
This refers to flowing a gas of P/Ps = 0.2 or less, or drying using an oven, etc. Note that commercially available silver zeolite is usually dried at about 400°C, so if used as is, the first leak detection can be performed without any manipulation.
また、前述の実施例では凝縮性ガスとして水の
場合について述べたが、他の油などの有機物ガス
の場合にも同様の効果が得られ、またリーク検出
に用いるガスとしてフレオンの場合について述べ
たが、CCl4、CHCl3など他の物理吸着性物質のガ
スの場合にも同様の効果が得られる。 In addition, although the above example described the case of water as the condensable gas, similar effects can be obtained with other organic gases such as oil, and the case of Freon as the gas used for leak detection was also described. However, similar effects can be obtained with gases of other physically adsorbable substances such as CCl 4 and CHCl 3 .
以上の如く、本発明は、銀ゼオライトを吸着材
とするヨウ素除去フイルタのリーク検出を物理吸
着性物質のガスを用いて実施可能とするもので、
産業上の効果の大なるものである。
As described above, the present invention enables leak detection of an iodine removal filter using silver zeolite as an adsorbent using a gas of a physically adsorbent substance.
This has great industrial effects.
第１図は、銀ゼオライトおよび添着炭の吸水量
と水のＰ／Psとの関係を示す線図、第２図は、
本発明の銀ゼオライトを充填したフイルタのリー
ク検出方法の一実施例を実施する装置のフロー
図、第３図は、水蒸気圧と温度との関係を示す線
図である。
１……ヨウ素フイルタハウジング、２……ヒー
ター、３……銀ゼオライト充填フイルタ、４……
フレオン発生器、５……フレオン濃度測定器。
Figure 1 is a diagram showing the relationship between water absorption of silver zeolite and impregnated coal and P/Ps of water, and Figure 2 is a diagram showing the relationship between water absorption of silver zeolite and impregnated carbon and P/Ps of water.
FIG. 3 is a flow diagram of an apparatus for carrying out an embodiment of the leak detection method for a filter filled with silver zeolite of the present invention, and is a diagram showing the relationship between water vapor pressure and temperature. 1...Iodine filter housing, 2...Heater, 3...Silver zeolite filled filter, 4...
Freon generator, 5...Freon concentration measuring device.
Claims (1)
ウ素除去フイルタのリークを検出する方法におい
て、前記銀ゼオライトの凝縮性ガスに対する吸着
活性を有する細孔が残存する状態で物理吸着性物
質のガスを通気させることを特徴とする銀ゼオラ
イトを充填したフイルタのリーク検出方法。 ２ 前記凝縮性ガスが水蒸気で、該水蒸気の凝縮
した水の吸着量が該銀ゼオライト１ｇ当り0.11ｇ
以下に保たれた状態で、ガスを通気させる特許請
求の範囲第１項記載の銀ゼオライトを充填したフ
イルタのリーク検出方法。 ３ 前記水の吸着量が前記銀ゼオライト１ｇ当り
0.11ｇ以下に保たれた状態が、相対湿度が20％以
下のガスを通気して得られる特許請求の範囲第２
項記載の銀ゼオライトを充填したフイルタのリー
ク検出方法。 ４ 前記相対湿度が20％以下のガスが、前記銀ゼ
オライト充填フイルタの前段に設けられた式 Ｗ＝5.75×10-3×Ｆ ここで、Ｗはヒータ容量（kW） Ｆは銀ゼオライト充填フイルタに通気するガス
の流量（m3／ｈ） で算出される容量以上のヒータによる加熱で得ら
れる特許請求の範囲第３項記載の銀ゼオライトを
充填したフイルタのリーク検出方法。[Scope of Claims] 1. In a method for detecting leakage in an iodine removal filter filled with silver zeolite as an adsorbent, physical adsorption is performed in a state in which pores of the silver zeolite that have adsorption activity for condensable gas remain. A method for detecting leakage in a filter filled with silver zeolite, which is characterized by aerating gas from a substance. 2. The condensable gas is water vapor, and the adsorption amount of water condensed from the water vapor is 0.11 g per 1 g of the silver zeolite.
A method for detecting leakage in a filter filled with silver zeolite according to claim 1, in which gas is aerated while the following conditions are maintained. 3 The adsorption amount of the water is per gram of the silver zeolite.
Claim 2 in which the state maintained at 0.11 g or less is obtained by aerating gas with a relative humidity of 20% or less.
Leak detection method for a filter filled with silver zeolite as described in . 4. The gas with a relative humidity of 20% or less is provided before the silver zeolite-filled filter. W = 5.75 × 10 -3 × F Here, W is the heater capacity (kW) F is the silver-zeolite-filled filter. A method for detecting leakage in a filter filled with silver zeolite according to claim 3, which is obtained by heating with a heater having a capacity greater than that calculated by the flow rate (m 3 /h) of gas to be vented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57165281A JPS5954946A (en) | 1982-09-21 | 1982-09-21 | Method for detecting leakage from filter filled with silver zeolite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57165281A JPS5954946A (en) | 1982-09-21 | 1982-09-21 | Method for detecting leakage from filter filled with silver zeolite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5954946A JPS5954946A (en) | 1984-03-29 |
| JPH0310061B2 true JPH0310061B2 (en) | 1991-02-12 |
Family
ID=15809345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57165281A Granted JPS5954946A (en) | 1982-09-21 | 1982-09-21 | Method for detecting leakage from filter filled with silver zeolite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5954946A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007155456A (en) * | 2005-12-02 | 2007-06-21 | Takemasa Kamimoto | Dpf evaluation apparatus |
| JP2012103119A (en) * | 2010-11-10 | 2012-05-31 | Japan Environment Research Co Ltd | Removal effect measurement system |
| JP2012103120A (en) * | 2010-11-10 | 2012-05-31 | Japan Environment Research Co Ltd | Removal effect measurement system |
| JP5641912B2 (en) * | 2010-12-14 | 2014-12-17 | 株式会社日本環境調査研究所 | Removal efficiency measurement system |
| KR101996976B1 (en) * | 2015-03-12 | 2019-07-05 | 라사 인더스트리즈, 리미티드 | Filler for filter vents, and filter vent device |
-
1982
- 1982-09-21 JP JP57165281A patent/JPS5954946A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5954946A (en) | 1984-03-29 |
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