JPH02107999A - Iodine collector - Google Patents
Iodine collectorInfo
- Publication number
- JPH02107999A JPH02107999A JP25942688A JP25942688A JPH02107999A JP H02107999 A JPH02107999 A JP H02107999A JP 25942688 A JP25942688 A JP 25942688A JP 25942688 A JP25942688 A JP 25942688A JP H02107999 A JPH02107999 A JP H02107999A
- Authority
- JP
- Japan
- Prior art keywords
- iodine
- tank
- sampling
- gas
- piping
- 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.)
- Pending
Links
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 229910052740 iodine Inorganic materials 0.000 title claims abstract description 70
- 239000011630 iodine Substances 0.000 title claims abstract description 70
- 238000005070 sampling Methods 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 10
- 239000000428 dust Substances 0.000 abstract description 9
- 239000003518 caustics Substances 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 5
- 239000002253 acid Substances 0.000 abstract description 2
- 150000007513 acids Chemical class 0.000 abstract 1
- 239000012212 insulator Substances 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000012774 insulation material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000010795 gaseous waste Substances 0.000 description 3
- 230000002285 radioactive effect Effects 0.000 description 2
- 241001609213 Carassius carassius Species 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、気体中に含まれる放射性沃素を捕集するの
に好適な沃素捕集装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an iodine collection device suitable for collecting radioactive iodine contained in gas.
例えば、原子力施設の廃棄物焼却炉から排気されるガス
中に含まれる放射性沃素を捕集して測定する際には、ガ
ス中に混在する塩酸（ＨＣｌ２）、硫酸（Ｈ２Ｓ０Ｊ）
等の腐食性物質を除去して、沃素捕集装置を構成する機
器や配管等が腐食することを防止する必要がある。For example, when collecting and measuring radioactive iodine contained in gas exhausted from a waste incinerator at a nuclear facility, hydrochloric acid (HCl2) and sulfuric acid (H2S0J) mixed in the gas are
It is necessary to remove such corrosive substances to prevent corrosion of the equipment, piping, etc. that make up the iodine collection device.
第２図は例えば実開昭６２−５７１９５号公報に示され
た従来のこの種の沃素捕集装置の構成を示す系統図であ
り、図において、１は排気筒、２はこの排気筒１に取付
けられたサンプリングノズル、３はサンプリングノズル
２に接続されたサンプリング配管、４は加熱器、５は塵
埃フィルタ６と沃素フィルタ７とを収納した沃素捕集容
器、８及び９はサンプリング配管３に接続された圧力計
及び流量計、１０はサンプリング配管３に接続されたサ
ンプリングポンプ、１１はサンプリング配管３に施され
た加熱保温材である。なお、塵埃フィルタ６と沃素フィ
ルタ７とは、それぞれ活性炭により構成されている。FIG. 2 is a system diagram showing the configuration of a conventional iodine trapping device of this type, as disclosed in, for example, Japanese Utility Model Application Publication No. 62-57195. The attached sampling nozzle, 3 is a sampling pipe connected to the sampling nozzle 2, 4 is a heater, 5 is an iodine collection container containing a dust filter 6 and an iodine filter 7, 8 and 9 are connected to the sampling pipe 3 10 is a sampling pump connected to the sampling pipe 3, and 11 is a heating insulation material applied to the sampling pipe 3. Note that the dust filter 6 and the iodine filter 7 are each made of activated carbon.
次に動作について説明する。気体廃棄物の放出最終端を
成す排気筒１に、挿入した形で取付けられたサンプリン
グノズル２から、この気体廃棄物を採取し、サンプリン
グ配管３を介してサンプリングポンプ１０で送気する。Next, the operation will be explained. The gaseous waste is sampled from a sampling nozzle 2 inserted into an exhaust pipe 1 which forms the final end of gaseous waste discharge, and is supplied via a sampling pipe 3 with a sampling pump 10.
送気された気体廃棄物は加熱器４で加熱され、相対湿度
が低下した状態で沃素捕集容器５に収納された塵埃フィ
ルタ６でガス中の塵埃が捕集された後、沃素フィルタフ
に入り沃素が捕集される。The supplied gaseous waste is heated by a heater 4, and the dust in the gas is collected by a dust filter 6 housed in an iodine collection container 5 while the relative humidity is reduced, and then enters the iodine filter filter. Iodine is collected.
捕集された塵埃及び沃素は別の放射能分析装置によって
、各種分析定量が行なわれる。The collected dust and iodine are subjected to various analyzes and quantifications using separate radioactivity analyzers.
サンプリング配管３には加熱保温材（例えば、テープ状
ヒータ保温材）１１が施され、サンプリングガス中の水
分、塩酸、硫酸等が結露してサンプリング配管３の内壁
に付着し、該サンプリング配管３が腐食するのを防止し
ている。また、サンプリングは圧力計８、流量計９を監
視することで制御する。A heating heat insulating material (for example, a tape-shaped heater heat insulating material) 11 is applied to the sampling pipe 3, and moisture, hydrochloric acid, sulfuric acid, etc. in the sampling gas condenses and adheres to the inner wall of the sampling pipe 3. Prevents corrosion. Further, sampling is controlled by monitoring a pressure gauge 8 and a flow meter 9.
従来の沃素捕集装置は以上のように構成されているので
、サンプリング配管３の全長に亘る加熱保温材１１の消
費電力が大きくなり、省エネルギ一対策上好ましくない
等問題点があった。また、完全に腐食性物質の凝結を防
止するには、かなりの高温（約２００℃）に維持する必
要があるため、このような場合には沃素フィルタ７を構
成する活性炭の添着物質（例えば、メリエチルジアミン
）が徐々に揮発して沃素の捕集性能の低下を招く等の問
題点があった。更に、沃素捕集容器５の前段でサンプリ
ングガスを冷却した場合は、そこで腐食性成分が結露し
、同時に沃素の一部もそれに結合するので、捕集誤差が
大きくなる等の問題点があった。Since the conventional iodine collection device is constructed as described above, there are problems such as the power consumption of the heating and insulating material 11 over the entire length of the sampling pipe 3 becomes large, which is not preferable in terms of energy saving. Furthermore, in order to completely prevent the condensation of corrosive substances, it is necessary to maintain the temperature at a considerably high temperature (approximately 200°C). There were problems such as gradual volatilization of merethyldiamine, resulting in a decrease in iodine collection performance. Furthermore, if the sampling gas is cooled before the iodine collection container 5, corrosive components will condense there, and at the same time some of the iodine will also bind to it, leading to problems such as increased collection errors. .
この発明は上記のような問題点を解消するためになされ
たもので、付属機器及びサンプリング配管がガス中の腐
食性物質によって腐食することを防止すると共に、沃素
フィルタの沃素捕集能力が長時間維持、保証できる温度
下で捕集を可能とした沃素捕集装置を得ることを目的と
する。This invention was made to solve the above problems, and it prevents the attached equipment and sampling piping from being corroded by corrosive substances in the gas, and also prevents the iodine filter from retaining its iodine collection ability for a long time. The purpose of this invention is to obtain an iodine collection device that can collect iodine at a temperature that can be maintained and guaranteed.
この発明に係る沃素捕集装置は、沃素捕集容器の周囲に
冷却器を配置し、高温ガスを冷却しながら同時に沃素を
捕集するようにし、かつ沃素捕集容器の前段のサンプリ
ング配管のみを加熱配管で加熱するようにしたものであ
る。The iodine collection device according to the present invention has a cooler arranged around the iodine collection container to simultaneously collect iodine while cooling high-temperature gas, and only the sampling piping at the front stage of the iodine collection container. It is heated using heating piping.
この発明における沃素捕集容器は、その周囲に配設され
た冷却器によって冷却され、そこを通るガスの温度を急
速に低下せしめ、該沃素捕集容器内で腐食性成分をドレ
ン化する。また、加熱保温材は、沃素捕集容器の前段の
サンプリング配管のみを加熱する。The iodine collection vessel in the present invention is cooled by a cooler disposed around it, rapidly lowering the temperature of the gas passing therethrough, and draining corrosive components within the iodine collection vessel. Further, the heating heat insulating material heats only the sampling pipe in the front stage of the iodine collection container.
（実施例）
以下、この発明の一実施例を図について説明する。第１
図において、第２図と同一符号は同又は相当部分を示す
。１２は沃素捕集容器５を囲む形で配置されてサンプリ
ングガスの冷却を行う冷却器、１３は冷却により得られ
たガス中の水分及び腐食性物質のドレンを一時的に貯留
するドレンタンク、１４はドしノンタンク１３の止弁で
ある。なお、この実施例では、加熱保温材１１は沃素捕
集容器５の前段のサンプリング配管３のみに設けられて
いる。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
In the figure, the same reference numerals as in FIG. 2 indicate the same or corresponding parts. 12 is a cooler that is arranged to surround the iodine collection container 5 and cools the sampling gas; 13 is a drain tank that temporarily stores moisture and corrosive substances in the gas obtained by cooling; 14 is a stop valve for the non-tank 13. In this embodiment, the heating insulation material 11 is provided only in the sampling pipe 3 upstream of the iodine collection container 5.
次にこの実施例の動作について説明する。排気筒１に設
けたサンプリングノズル２から採集されたガスは、サン
プリング配管３を介して沃素捕集容器５に送られる。こ
の場合、採集されたガスは、沃素捕集容器５の前段のサ
ンプリング配管３に施された加熱保温材１１で高温に維
持されたまま該沃素捕集容器５に入るが、該沃素捕集容
器５の周囲に配置した冷却器１２の冷却作用により、ガ
ス中の水分がドレン化され、腐食性物質（例えば、塩酸
、硫酸等）がそのドレン中に溶解する。このようにして
沃素捕集容器５前段部の塵埃フィルタ６の活性炭中で結
露した酸は、その一部が沃素と反応し、留まる。さらに
、沃素捕集容器５後段部の沃素フィルタ７へ流入したガ
スは、該沃素フィルタフの活性炭の沃素捕集能力が維持
できる温度まで低下させられ、そこで沃素が捕集される
。Next, the operation of this embodiment will be explained. Gas collected from a sampling nozzle 2 provided in an exhaust pipe 1 is sent to an iodine collection container 5 via a sampling pipe 3. In this case, the collected gas enters the iodine collection container 5 while being maintained at a high temperature by the heating insulation material 11 provided on the sampling pipe 3 at the front stage of the iodine collection container 5. Due to the cooling effect of the cooler 12 placed around the gas tank 5, moisture in the gas is converted into drain, and corrosive substances (for example, hydrochloric acid, sulfuric acid, etc.) are dissolved in the drain. A part of the acid condensed in the activated carbon of the dust filter 6 at the front stage of the iodine collection container 5 reacts with iodine and remains there. Further, the gas flowing into the iodine filter 7 at the rear stage of the iodine collection container 5 is lowered to a temperature at which the iodine collection ability of the activated carbon of the iodine filter can be maintained, and iodine is collected there.
腐食性物質は、沃素捕集容器５内の前段でドレン化され
て除去されるため、後続する圧力計８、流量計９、サン
プリングポンプ１０までの機器及びサンプリング配管３
の腐食が回避される。Since corrosive substances are drained and removed at the front stage in the iodine collection container 5, the equipment and sampling piping 3 up to the subsequent pressure gauge 8, flow meter 9, and sampling pump 10 are removed.
corrosion is avoided.
また、沃素捕集容器５後段部では、ガス温度が沃素フィ
ルタフの活性炭の沃素捕集効率が十分維持できるまで低
下（例えば１００℃）しているので、確実に沃素が捕集
できる。In addition, in the latter part of the iodine collection vessel 5, the gas temperature is lowered to a level where the iodine collection efficiency of the activated carbon of the iodine filter can be sufficiently maintained (for example, 100° C.), so that iodine can be reliably collected.
ガス中の水分が結露した場合、その中に沃素が溶は込み
、捕集材に吸着される以前にサンプリング配管３に付着
するため、沃素定量誤差を犬ぎくする。When the moisture in the gas condenses, iodine dissolves in it and adheres to the sampling pipe 3 before being adsorbed by the collection material, thereby increasing errors in iodine determination.
しかしながら、この発明の構造では、沃素捕集容器５内
の前段の塵埃フィルタ６で結露するため、その部分の活
性炭に吸着した沃素を併せて定量することで、上記誤差
を小さくすることができる。However, in the structure of the present invention, since dew condenses on the dust filter 6 at the front stage in the iodine collection container 5, the above-mentioned error can be reduced by also quantifying the iodine adsorbed on the activated carbon in that area.
（発明の効果）
以上のように、この発明によれば沃素捕集容器の前段の
サンプリング配管のみを加熱保温材で加熱し、かつ沃素
捕集客器は冷却器により直接冷却するように構成したの
で、該沃素捕集容器の後段のサンプリング配管の加熱保
温なしでその腐食を防止で鮒、また定量誤差の小さい捕
集性能を得られる効果がある。(Effects of the Invention) As described above, according to the present invention, only the sampling pipe at the front stage of the iodine collection container is heated by the heating insulation material, and the iodine collection container is directly cooled by the cooler. This method has the effect of preventing corrosion of the sampling pipe downstream of the iodine collection container without heating and insulating it, and obtaining performance for collecting crucian carp and small quantitative errors.
第１図はこの発明の一実施例による沃素捕集装置を示す
概略系統図、第２図は従来の沃素捕集装置を示す概略系
統図である。
１は排気筒、２はサンプリングノズル、３はサンプリン
グ配管、５は沃素捕集容器、６は塵埃フィルタ、７は沃
素フィルタ、１０はサンプリングポンプ、１１は加熱保
温材、１２は冷却器。
なお、図中、同一符号は同一、又は相当部分を示す。FIG. 1 is a schematic system diagram showing an iodine trapping device according to an embodiment of the present invention, and FIG. 2 is a schematic system diagram showing a conventional iodine trapping device. 1 is an exhaust pipe, 2 is a sampling nozzle, 3 is a sampling pipe, 5 is an iodine collection container, 6 is a dust filter, 7 is an iodine filter, 10 is a sampling pump, 11 is a heating insulation material, and 12 is a cooler. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
スを沃素捕集容器にサンプリング配管で導いて前記サン
プリングガス中の沃素を捕集する沃素捕集装置において
、前記沃素捕集容器の周囲には前記サンプリングガス中
の腐食性成分をドレン化する冷却器が設けられ、前記沃
素捕集容器の前段の前記サンプリング配管のみに加熱保
温材が設けられていることを特徴とする沃素捕集装置。In an iodine collection device that collects iodine in the sampling gas by guiding the sampling gas sampled by a sampling nozzle to an iodine collection container through sampling piping, the iodine collection container is surrounded by a corrosive gas in the sampling gas. An iodine collection device characterized in that a cooler for draining components is provided, and a heating heat insulating material is provided only in the sampling pipe upstream of the iodine collection container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25942688A JPH02107999A (en) | 1988-10-17 | 1988-10-17 | Iodine collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25942688A JPH02107999A (en) | 1988-10-17 | 1988-10-17 | Iodine collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02107999A true JPH02107999A (en) | 1990-04-19 |
Family
ID=17333934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25942688A Pending JPH02107999A (en) | 1988-10-17 | 1988-10-17 | Iodine collector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02107999A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007271431A (en) * | 2006-03-31 | 2007-10-18 | Furukawa Electric Co Ltd:The | Pressure-measuring device |
-
1988
- 1988-10-17 JP JP25942688A patent/JPH02107999A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007271431A (en) * | 2006-03-31 | 2007-10-18 | Furukawa Electric Co Ltd:The | Pressure-measuring device |
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