JPH03148059A - Hydrogen chloride concentration meter - Google Patents
Hydrogen chloride concentration meterInfo
- Publication number
- JPH03148059A JPH03148059A JP1288217A JP28821789A JPH03148059A JP H03148059 A JPH03148059 A JP H03148059A JP 1288217 A JP1288217 A JP 1288217A JP 28821789 A JP28821789 A JP 28821789A JP H03148059 A JPH03148059 A JP H03148059A
- Authority
- JP
- Japan
- Prior art keywords
- bromine
- ions
- liquid
- measured
- gas
- 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
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims description 11
- 229910000041 hydrogen chloride Inorganic materials 0.000 title claims description 11
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 title claims description 11
- 239000007788 liquid Substances 0.000 claims abstract description 27
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims abstract description 9
- 238000005040 ion trap Methods 0.000 claims abstract description 7
- 229910021607 Silver chloride Inorganic materials 0.000 claims abstract description 5
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims abstract description 5
- 238000010521 absorption reaction Methods 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 7
- 229940006460 bromide ion Drugs 0.000 claims description 5
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 abstract description 21
- 229910052794 bromium Inorganic materials 0.000 abstract description 21
- -1 chlorine ions Chemical class 0.000 abstract description 14
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052801 chlorine Inorganic materials 0.000 abstract description 5
- 239000000460 chlorine Substances 0.000 abstract description 5
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000008187 granular material Substances 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract 1
- 239000012295 chemical reaction liquid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- LFAGQMCIGQNPJG-UHFFFAOYSA-N silver cyanide Chemical compound [Ag+].N#[C-] LFAGQMCIGQNPJG-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は塩化水素濃度針に関し、特に、吸収液を用い
た塩化水素濃度計に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hydrogen chloride concentration needle, and particularly to a hydrogen chloride concentration meter using an absorption liquid.
第２図は従来の塩化水素濃度計を示すものである。 FIG. 2 shows a conventional hydrogen chloride concentration meter.
被測定ガスが煙道よりセラミックの１次フィルタ１１と
、被測定ガスの導入管１２を介して吸収管１３に導かれ
る。該被測定ガスの導入管１２と吸収管１３は被測定ガ
スの組成が結露によって変化しないように加温ヒーター
１４によって加熱保温されている。そして特殊五方コッ
ク１５が図示の位置に操作された時、後述する第１セル
室１から送られてくる吸収液に、吸収管１３内で被測定
ガス中の測定対象ガス（この場合はＨ（１）の大部分が
吸収される。吸収液はタンク１７からポンプ１８によっ
て一定の割合で供給管１９を介して第１セル室１へ送出
されている。そしてこの吸収液の供給管１９は吸収管１
３の後段１３”と一体構造となり熱交換器２０を形成し
ている。それ故、供給管１９を介して第１セル室１に送
出される吸収液と吸収管１３から第２セル室２に流入す
る反応液は同一の温度を持つようになり、以下に説明す
る指示電極５と測定電極６間に温度差による測定誤差を
生じさせない。The gas to be measured is guided from the flue to the absorption tube 13 via a ceramic primary filter 11 and an inlet pipe 12 for the gas to be measured. The measurement gas introduction tube 12 and absorption tube 13 are heated and kept warm by a heating heater 14 so that the composition of the measurement gas does not change due to dew condensation. When the special five-way cock 15 is operated to the illustrated position, the absorption liquid sent from the first cell chamber 1, which will be described later, is applied to the gas to be measured (in this case, H Most of (1) is absorbed.The absorption liquid is sent from the tank 17 to the first cell chamber 1 through the supply pipe 19 at a constant rate by the pump 18.The absorption liquid supply pipe 19 is Absorption tube 1
It has an integral structure with the latter stage 13'' of 3 to form a heat exchanger 20. Therefore, the absorption liquid sent to the first cell chamber 1 via the supply pipe 19 and the absorption liquid sent from the absorption pipe 13 to the second cell chamber 2 The inflowing reaction liquid has the same temperature, so that no measurement error occurs due to a temperature difference between the indicator electrode 5 and the measuring electrode 6, which will be described below.
測定部は第３図に示すように、被測定ガス吸収前の反応
液が流入流出する第１のセル室１と被測定ガス吸収後の
反応液の流出入する第２のセル室２との間に、前記第１
のセル室１と第２のセル室２との間に液絡部４を介して
第３のセル室３を設け、第１、第２のセル室１．２中に
特定イオン（この場合０１″）に対してのみ起電力を生
じる指示電極５と測定電極６を設ける一方、また、第３
のセル室３中に基準電極７を設けた構成となっている。As shown in Fig. 3, the measurement section has a first cell chamber 1 into which the reaction liquid before absorbing the gas to be measured flows in and out, and a second cell chamber 2 into which the reaction liquid after absorbing the gas to be measured flows in and out. In between, the first
A third cell chamber 3 is provided between the cell chamber 1 and the second cell chamber 2 via a liquid junction 4, and a specific ion (01 in this case) is provided in the first and second cell chambers 1.2. An indicator electrode 5 and a measuring electrode 6 are provided which generate an electromotive force only for
The structure is such that a reference electrode 7 is provided in a cell chamber 3.
この構成により、第１のセル室１の指示電極５と基準電
極７間の電位差Ｖ、及び第２のセル室２の測定電極６と
基準電極７間の電位差Ｖ２の差（ｖ＋ −ＶＺ ）を測
定することによって、ガス濃度を測定できる。この方法
によると、基準電極が１つであり、各セル室１．２．３
が液絡しているので温度変化等の原因で、両電位Ｖ、、
Ｖ、が変化しても両電位の差Ｖ、−Ｖｔにはその影響が
現れないこととなって、温度変化等による誤差が生じな
い。With this configuration, the difference (v+ −VZ) between the potential difference V between the indicator electrode 5 and the reference electrode 7 in the first cell chamber 1 and the potential difference V2 between the measuring electrode 6 and the reference electrode 7 in the second cell chamber 2 is By measuring, the gas concentration can be determined. According to this method, there is one reference electrode and each cell chamber 1.2.3
Since there is a liquid junction, both potentials V,,, due to temperature changes etc.
Even if V changes, the difference between the two potentials V and -Vt will not be affected by it, and no errors will occur due to temperature changes or the like.
上記の構成において、塩素イオン検出電極として、Ａｇ
棒にＡｇ（１！とＡｇ、Ｓとの混合難溶物を塗布した物
質が用いられ、この中の塩素イオンの感応主成分はＡｇ
Ｃ／！である。In the above configuration, Ag
A rod is coated with a poorly soluble mixture of Ag (1!, Ag, and S), and the main component sensitive to chlorine ions is Ag.
C/! It is.
すなわち、上記吸収液の塩素イオン濃度と上記Ｖ、−Ｖ
、との関係は第４図（ａ）の曲線１０に示すような濃度
−電圧曲線を示し、上記塩素イオン検出電極を吸収液に
つけたまま、例えば１０日間放置しても、放置後の濃度
−電圧曲線を表す曲線２１に示す通り、はとんど変化が
ない。That is, the chlorine ion concentration of the absorption liquid and the V, -V
The relationship between , shows a concentration-voltage curve as shown in curve 10 in FIG. As shown in curve 21 representing the voltage curve, there is almost no change.
Ｃ発明が解決しようとする課題〕
ところで、ゴミ焼却炉では臭素を含む物質が焼却される
ことがある。排ガス中に臭素が含まれると、該臭素は当
然前記吸収液中に臭素イオンとして含まれることになり
、上記測定電極６とＡｇ（１！ ＋Ｂ ｒ−−ＡｇＢ
ｒ 十ＣＪ−・−・■なる反応によって電極がＡｇＢｒ
に置換されるため、塩素イオンに感応しなくなる。第４
図（ｂ）はその状態を示すものであって、臭素イオンを
含む吸収液に、上記測定電極６を漬けたまま放置してお
くと、上記の反応が進行し曲線１２のように塩素イオン
に感応しなくなる。Problems to be Solved by Invention C] By the way, substances containing bromine are sometimes incinerated in garbage incinerators. When bromine is contained in the exhaust gas, the bromine will naturally be contained in the absorption liquid as bromine ions, and the measurement electrode 6 and Ag(1! +B r--AgB
The electrode becomes AgBr due to the reaction r 1CJ-・-・■
, it becomes insensitive to chloride ions. Fourth
Figure (b) shows this state. When the measurement electrode 6 is left immersed in an absorption liquid containing bromide ions, the above reaction progresses and chloride ions are produced as shown in curve 12. I become insensitive.
この発明は上記従来の事情に鑑みて提案されたものであ
って、臭素含有排ガスを測定しても、測定電極が臭素に
侵されない塩化水素濃度計を提供することを目的とする
。The present invention has been proposed in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a hydrogen chloride concentration meter whose measurement electrode is not attacked by bromine even when measuring bromine-containing exhaust gas.
この発明は上記目的を達成するために、以下の手段を採
用している。すなわち、被測定ガスを吸収液に吸収させ
て排ガス中のＨＣＡを塩素イオン濃度として検出する塩
化水素濃度計において、上記吸収液を測定電極に導く途
中に臭素イオントラップを設けたものである。In order to achieve the above object, the present invention employs the following means. That is, in a hydrogen chloride concentration meter that detects HCA in exhaust gas as a chloride ion concentration by absorbing a gas to be measured in an absorbing liquid, a bromide ion trap is provided in the middle of guiding the absorbing liquid to a measuring electrode.
上記臭素トラップとしてＡｇＣ１を用いるとＡｇ（１！
＋Ｂｒ−−ＡｇＢｒ＋Ｃｊ！なる置換が生じ、吸収液中
の臭素イオンを除去できる。このとき発生した臭素イオ
ンと同等の塩素イオンは指示電極の電位を高めるが０式
による測定電極でのＡｇＣＪがＡｇＢｒに変化し、性能
劣化を生ずることはない。また、臭素イオンの発生は一
時的なものであるため、臭素イオンがなくなると安定し
た正確な測定に復帰する。When AgC1 is used as the above bromine trap, Ag(1!
+Br--AgBr+Cj! This substitution occurs, and the bromine ions in the absorption liquid can be removed. Chlorine ions equivalent to the bromine ions generated at this time increase the potential of the indicator electrode, but AgCJ at the measuring electrode according to the 0 formula changes to AgBr, and performance does not deteriorate. Furthermore, since the generation of bromine ions is temporary, stable and accurate measurement will resume once the bromine ions are gone.
第１図はこの発明の一実施例を示す塩化水素濃度計の要
部を示すものである。FIG. 1 shows the main parts of a hydrogen chloride concentration meter showing an embodiment of the present invention.
吸収管１３で被測定ガスが吸収液に吸収された後、五方
コック１５を介して臭素イオントラップ２１に導かれ、
その後熱交換器２０を介して第２セル室２に導かれる。After the gas to be measured is absorbed into the absorption liquid in the absorption tube 13, it is led to the bromide ion trap 21 via the five-way cock 15,
Thereafter, it is guided to the second cell chamber 2 via the heat exchanger 20.
この臭素トラップ２１にはＡｇＣｊ！の粒状体が所定量
充填される。This bromine trap 21 contains AgCj! A predetermined amount of granular material is filled.
この構成において吸収液に臭素イオンが含まれていると
、
Ａｇ（ｌｌ！＋Ｂｒ−−ＡｇＢｒ＋Ｃｊｌ−なる反応が
生じ、ＡｇＣ１がＡｇＢｒに置換される。その分だけ塩
素イオン濃度が増加することになる。In this configuration, if the absorption liquid contains bromine ions, the reaction Ag(ll!+Br--AgBr+Cjl- occurs, and AgCl is replaced by AgBr. The chlorine ion concentration increases by that amount.
上記トランプによりＡｇＣＮからＡｇＢｒへの置換反応
は化学理論的に１：１で行われていることも確認した。It was also confirmed by the above playing cards that the substitution reaction from AgCN to AgBr was carried out in a chemically theoretical ratio of 1:1.
また、上記塩化水素濃度針の吸収液送液速度１ｍｊ！／
ｍｉｎ、ガス吸引量３００ ｍ ｊ！ ／ ｍ ｉ ｎ
のもとて２ｇのＡｇＣ１）ラップを用い、臭素イオンが
ｌＯｐｐｍである場合、約７５日程度トラップ機能を維
持することも確認している。Also, the absorption liquid feeding speed of the hydrogen chloride concentration needle is 1mj! /
min, gas suction amount 300 mj! / min
It has also been confirmed that the trapping function is maintained for about 75 days when bromine ions are 10ppm using 2g of AgC1) wrap.
構成図、第３図は第２図の要部拡大図、第４図（ａ）（
ｂ）はＡｇ、ＡｇＣ１’、Ａｇｔ Ｓ電極の吸収液によ
る変化を示すグラフである。The configuration diagram, Figure 3 is an enlarged view of the main part of Figure 2, Figure 4 (a) (
b) is a graph showing changes in Ag, AgC1', and Agt S electrodes depending on the absorption liquid.
図中、 ２１・・・臭素イオントラップ。In the figure, 21...Bromide ion trap.
以上説明したようにこの発明は吸収液を用いた塩化水素
濃度計において、Ａｇ（ｌを臭素トラップとして用いて
いるので、指示電極が臭素イオンによって侵されること
がなく、塩素イオンに対する感応力を持続することがで
きる。As explained above, this invention uses Ag(l) as a bromine trap in a hydrogen chloride concentration meter using an absorption liquid, so the indicator electrode is not attacked by bromide ions and maintains sensitivity to chloride ions. can do.
Claims (1)
ｌを塩素イオン濃度として検出する塩化水素濃度計にお
いて、 上記吸収液を測定電極に導く途中に臭素イ オントラップを設けたことを特徴とする塩化水素濃度計
。 〔２〕上記臭素イオントラップとしてＡｇＣｌを用いた
請求項１に記載の塩化水素濃度計。[Claims] [1] HC in the exhaust gas by absorbing the gas to be measured in an absorption liquid
A hydrogen chloride concentration meter that detects l as a chloride ion concentration, characterized in that a bromide ion trap is provided in the middle of guiding the absorption liquid to a measurement electrode. [2] The hydrogen chloride concentration meter according to claim 1, wherein AgCl is used as the bromide ion trap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1288217A JPH03148059A (en) | 1989-11-06 | 1989-11-06 | Hydrogen chloride concentration meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1288217A JPH03148059A (en) | 1989-11-06 | 1989-11-06 | Hydrogen chloride concentration meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03148059A true JPH03148059A (en) | 1991-06-24 |
Family
ID=17727337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1288217A Pending JPH03148059A (en) | 1989-11-06 | 1989-11-06 | Hydrogen chloride concentration meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03148059A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007333487A (en) * | 2006-06-13 | 2007-12-27 | Dkk Toa Corp | Gas analysis unit, gas analyzer and gas analysis method |
-
1989
- 1989-11-06 JP JP1288217A patent/JPH03148059A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007333487A (en) * | 2006-06-13 | 2007-12-27 | Dkk Toa Corp | Gas analysis unit, gas analyzer and gas analysis method |
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