JPS6330995Y2 - - Google Patents
Info
- Publication number
- JPS6330995Y2 JPS6330995Y2 JP12544682U JP12544682U JPS6330995Y2 JP S6330995 Y2 JPS6330995 Y2 JP S6330995Y2 JP 12544682 U JP12544682 U JP 12544682U JP 12544682 U JP12544682 U JP 12544682U JP S6330995 Y2 JPS6330995 Y2 JP S6330995Y2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- cell
- sample gas
- analyzer
- automobile exhaust
- 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
Links
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- 230000003647 oxidation Effects 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 11
- 230000002452 interceptive effect Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 53
- 230000000694 effects Effects 0.000 description 14
- 238000005259 measurement Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000004043 responsiveness Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、主サンプリング流路を、それぞれセ
ルを有する２流路に分岐して、一方のセルにサン
プルガスを流し、他方のセルにはサンプルガスを
測定成分除去器に通して得た比較ガスを流し、赤
外線吸収法によつて、サンプルガス中の測定成分
ガスを測定するようにした２光路式ガス分析計を
応用した自動車排ガス中のSO2分析計に関するも
のである。[Detailed description of the invention] [Industrial application field] The present invention branches the main sampling flow path into two flow paths each having a cell, and the sample gas flows into one cell while the other cell has a cell. A two-light path gas analyzer is used to measure the sample gases in the sample gas using an infrared absorption method by passing the sample gas through a sample gas remover and passing the obtained comparison gas through a sample gas remover. It concerns an SO 2 analyzer.
上記の２光路式ガス分析計は、特開昭50−
155278号公報にも示されているように、一方のセ
ルに、比較ガスとして、サンプルガスから測定成
分のみを除去したサンプルガスを流し、他方のセ
ルに未処理のサンプルガスを流すため、サンプル
ガス中に干渉成分が含まれていても、両セル中の
ガスに干渉成分が等しい濃度で存在することにな
り、干渉成分による影響を相殺でき、精密な測定
が可能であると考えられていた。
The above-mentioned two-light path gas analyzer is
As shown in Publication No. 155278, sample gas from which only the measurement components have been removed is supplied to one cell as a comparison gas, and untreated sample gas is supplied to the other cell. It was thought that even if the interfering components were present in the gases in both cells, the interfering components would be present at the same concentration in the gas in both cells, and the effects of the interfering components could be canceled out, making precise measurements possible.
しかしながら、上記のガス分析計においても、
実際には、比較ガスを精製する測定成分除去器へ
の干渉成分の吸着等により、両セルＡ，Ｂに流れ
込む干渉成分に時間のずれ（第２図にｔで示す。）
が生じ、この時間差分は相殺できず、第２図に示
すように、干渉影響が生じていたのである。
However, even in the above gas analyzer,
In reality, there is a time lag in the interference components flowing into both cells A and B (indicated by t in Figure 2) due to adsorption of interference components to the measurement component remover that purifies the comparison gas.
This time difference could not be canceled out, and as shown in FIG. 2, an interference effect occurred.
殊に、上記の分析計を応用した自動車排ガス中
のSO2分析計にあつては、応答性の速さが要求さ
れるのであるが、自動車排ガスにおけるSO2測定
では、干渉成分となるH2O，CO，HCの濃度が
高いため、上記の時間のずれや干渉成分の濃度変
化等による影響が大きく、応答性を損なうことな
く高精度のSO2測定を行うことが困難であつた。 In particular , a SO 2 analyzer for automobile exhaust gas using the above analyzer is required to have a fast response time . Because the concentrations of O, CO, and HC are high, the effects of the above-mentioned time lag and changes in the concentration of interfering components are large, making it difficult to perform highly accurate SO 2 measurements without impairing responsiveness.
上記の現状に鑑み、本考案は、応答性を損なう
ことなく、H2O，CO，HCによる干渉影響を除
去できるようにした自動車排ガス中のSO2分析計
を提供せんとするものである。 In view of the above-mentioned current situation, the present invention aims to provide an analyzer for SO 2 in automobile exhaust gas that can eliminate the interference effects of H 2 O, CO, and HC without impairing responsiveness.
〔問題点を解決するための手段〕
上記の目的を達成するために、本考案が講じた
技術的手段は、次のとおりである。即ち、本考案
による自動車排ガス中のSO2分析計は、自動車排
ガスを連続的に採取する主サンプリング流路を、
それぞれセルを有する２流路に分岐させて、一方
のセルにサンプルガスを流し、他方のセルにはサ
ンプルガスをSO2除去器に通して得た比較ガスを
流して、SO2を赤外線吸収法により測定する２光
路式の自動車排ガス中のSO2分析計であつて、上
記主サンプリング流路もしくはそれぞれの分岐流
路に、酸化炉と、これの後段に位置する除湿器と
を含む干渉成分前処理装置を装備したことを特徴
としている。[Means for solving the problems] In order to achieve the above objective, the technical means taken by the present invention are as follows. That is, the SO 2 analyzer for automobile exhaust gas according to the present invention has a main sampling flow path for continuously sampling automobile exhaust gas.
It is divided into two flow paths each having a cell, and the sample gas is passed through one cell, and the comparison gas obtained by passing the sample gas through an SO 2 remover is passed through the other cell, and SO 2 is removed by infrared absorption method. A two-light path type SO 2 analyzer in automobile exhaust gas that measures SO 2 in automobile exhaust gas, which includes an oxidation furnace in the main sampling flow path or each branch flow path, and a dehumidifier located after this, in front of the interfering components. It is characterized by being equipped with a processing device.
上記の構成によれば、サンプルガスを酸化炉に
通すことにより、サンプルガス中に含まれている
干渉影響の大きいCO，HCが干渉影響の小さい
SO2に変換され、上記の酸化反応により生成した
H2Oならびにサンプルガスにもともと含まれて
いたH2Oは、酸化炉後段の除湿器によつて効率
良く敏速に除去されることになる。
According to the above configuration, by passing the sample gas through the oxidation furnace, CO and HC contained in the sample gas, which have a large interference effect, are replaced with a small interference effect.
Converted to SO 2 and produced by the above oxidation reaction
H 2 O and the H 2 O originally contained in the sample gas are efficiently and quickly removed by the dehumidifier at the latter stage of the oxidation furnace.
以下、本考案の実施例を図面に基づいて説明す
る。
Hereinafter, embodiments of the present invention will be described based on the drawings.
第１図は本考案に係る自動車排ガス中のSO2分
析計を示す。図において、１はフイルタＦを通し
て吸引ポンプＰにより自動車排ガスを連続的に採
取する主サンプリング流路を示す。該主サンプリ
ング流路１の末端は２つの分岐流路２，３に分岐
され、一方の分岐流路３にサンプルガスから測定
成分（SO2）のみを除去するSO2除去器４が介装
されると共に、２つの分岐流路２，３の下流側に
試料セル５と比較セル６とが個別に接続され、試
料セル５にはサンプルガスをそのまま流し、比較
セル６にはサンプルガスからSO2のみが除去され
たサンプルガス（精製した比較ガス）を流すよう
に構成されている。更に、上記ポンプＰと両分岐
流路２，３との間で、主サンプリング流路１に、
サンプルガスに含まれている干渉成分のうちHC
とCOをH2OとCO2に変換する酸化炉７、及び該
酸化炉７の後段に位置する除湿器８との直列接続
体からなる干渉成分前処理装置９が装備されてい
る。１０，１１は光源、１２は２つの赤外線透過
窓を有するコンデンサマイクロホン等の検出器、
１３は増幅器、１４は指示器、１５はモータＭに
より回転駆動されるチヨツパーである。 Figure 1 shows the SO 2 analyzer for automobile exhaust gas according to the present invention. In the figure, reference numeral 1 indicates a main sampling flow path in which automobile exhaust gas is continuously sampled by a suction pump P through a filter F. The end of the main sampling channel 1 is branched into two branch channels 2 and 3, and one branch channel 3 is equipped with an SO 2 remover 4 that removes only the measurement component (SO 2 ) from the sample gas. At the same time, a sample cell 5 and a comparison cell 6 are individually connected to the downstream side of the two branch channels 2 and 3, and the sample cell 5 is supplied with the sample gas as it is, while the comparison cell 6 is supplied with SO 2 from the sample gas. It is configured to flow a sample gas (purified comparison gas) from which only the sample gas has been removed. Furthermore, between the pump P and both branch channels 2 and 3, in the main sampling channel 1,
Of the interfering components contained in the sample gas, HC
The interfering component pretreatment device 9 is equipped with an oxidation furnace 7 that converts CO into H 2 O and CO 2 , and a dehumidifier 8 connected in series after the oxidation furnace 7 . 10 and 11 are light sources; 12 is a detector such as a condenser microphone having two infrared transmitting windows;
13 is an amplifier, 14 is an indicator, and 15 is a chopper rotationally driven by a motor M.
上記の構成によれば、主サンプリング流路１に
おいて、自動車排ガスであるサンプルガスが前記
前処理装置９を通過することにより、サンプルガ
ス中の干渉成分H2O，CO，HCのうち、COと
HCは酸化炉７による燃焼酸化処理ではH2Oと干
渉影響の小さいCO2に変換され、次にH2O（サン
プルガスがもともを含んでいたH2Oに、酸化炉
７での酸化反応により生成されてH2Oがプラス
されたもの）が除湿器８で除去される。 According to the above configuration, in the main sampling channel 1, the sample gas, which is automobile exhaust gas, passes through the pretreatment device 9, so that among the interfering components H 2 O, CO, and HC in the sample gas, CO and
In the combustion oxidation process in the oxidation furnace 7, HC is converted into CO 2 which has a small interference effect with H 2 O, and then H 2 O (the H 2 O that the sample gas originally contained) is oxidized in the oxidation furnace 7. H 2 O generated by the reaction) is removed by a dehumidifier 8.
従つて、両分岐流路２，３には、干渉影響の大
きな干渉成分H2O，CO，HCが除去されたサン
プルガスが送り込まれ、一方のセル６には、SO2
除去器４でSO2のみを除去したサンプルガスが、
他方のセル５には、SO2を含むサンプルガスがそ
れぞれ導入され、赤外線吸収法によりサンプルガ
ス中のSO2が測定されることになる。 Therefore, sample gas from which interfering components H 2 O, CO, and HC, which have a large interference effect, have been removed is sent to both branch channels 2 and 3, and one cell 6 is supplied with SO 2
The sample gas from which only SO 2 has been removed by remover 4 is
A sample gas containing SO 2 is introduced into the other cell 5, and SO 2 in the sample gas is measured by an infrared absorption method.
前記除湿器８としては、特公昭56−25971号公
報に示されているような多段除湿器、あるいは、
パーマピユア社（PERMA PURE PRODUCTS
，INC）製の商品；パーマピユアドライヤー
（PERMA PURE DRYER。商品名である。）の
如き半透膜除湿器を用いればよく、特に限定され
るものではない。 The dehumidifier 8 may be a multi-stage dehumidifier as shown in Japanese Patent Publication No. 56-25971, or
PERMA PURE PRODUCTS
A semi-permeable membrane dehumidifier such as PERMA PURE DRYER (trade name) manufactured by INC., Inc. may be used, but there are no particular limitations.
第３図は、本考案の別の実施例を示す。この実
施例は、分岐流路２，３に三方電磁弁V1，V2を
介装し、各三方電磁弁V1，V2とそれらの下流側
における分岐流路３，２とにわたつて接続された
流路２′，３′を設けて、三方電磁弁V1，V2の切
換動作により、サンプルガスと生成比較ガス
（SO2のみを除去したサンプルガス）とが両セル
５，６に一定周期で一定流量ずつ交互に流れて、
流体変調方式による変調が行われ、かつ、２倍の
信号量が得られるようにした所謂クロスフロー型
の自動車排ガス中のSO2分析計に本考案を適用し
たものである。尚、第１図と同じ構成部材には同
一符号を付し、説明は省略した。 FIG. 3 shows another embodiment of the invention. In this embodiment, three-way solenoid valves V 1 and V 2 are interposed in the branch channels 2 and 3, and the valves are connected between the three-way solenoid valves V 1 and V 2 and the branch channels 3 and 2 on the downstream side thereof. By providing connected flow paths 2' and 3', the sample gas and the generated comparison gas (sample gas from which only SO 2 has been removed) are connected to both cells 5 and 6 by switching the three-way solenoid valves V 1 and V 2. A constant flow rate flows alternately at a constant cycle,
The present invention is applied to a so-called cross-flow type SO 2 analyzer for automobile exhaust gas that performs modulation using a fluid modulation method and can obtain twice the amount of signal. Components that are the same as those in FIG. 1 are given the same reference numerals, and their explanations are omitted.
本考案は、上述した構成よりなり、SO2除去器
およびセルにサンプルガスを送り込むのに先立
ち、酸化炉と除湿器とをこの順に通すので、干渉
影響の大きいCOやHCを酸化して干渉影響の小さ
いSO2に変換すると共に、上記の酸化反応により
生成したH2Oならびにサンプルガス中にもとも
と含まれていたH2Oを除湿器によつて効率良く
敏速に除去することができ、応答性を損なうこと
なく、H2O，CO，HCによる干渉影響を除去で
きるに至つたのである。
The present invention has the above-mentioned configuration, and before sending the sample gas to the SO 2 remover and cell, it passes through the oxidation furnace and dehumidifier in this order, so CO and HC, which have a large interference effect, are oxidized and the interference effect is removed. The dehumidifier can efficiently and quickly remove H 2 O generated by the above oxidation reaction as well as the H 2 O originally contained in the sample gas. This made it possible to eliminate the interference effects of H 2 O, CO, and HC without damaging the
第１図は本考案の一実施例を示す自動車排ガス
中のSO2分析計の構成図、第２図は従来の分析計
における干渉影響を説明するために用いる図、第
３図は本考案の別実施例を示す自動車排ガス中の
SO2分析計の構成図である。
１……主サンプリング流路、２，３……分岐流
路、４……SO2除去器、５，６……セル、９……
酸化炉７と除湿器８を含む干渉成分前処理装置。
Fig. 1 is a block diagram of a SO 2 analyzer for automobile exhaust gas showing an embodiment of the present invention, Fig. 2 is a diagram used to explain the interference effect in a conventional analyzer, and Fig. 3 is a diagram of the present invention. In automobile exhaust gas showing another example
FIG. 2 is a configuration diagram of an SO 2 analyzer. 1... Main sampling channel, 2, 3... Branch channel, 4... SO 2 remover, 5, 6... Cell, 9...
An interference component pretreatment device including an oxidation furnace 7 and a dehumidifier 8.
Claims (1)
グ流路を、それぞれセルを有する２流路に分岐さ
せて、一方のセルにサンプルガスを流し、他方の
セルにはサンプルガスをSO2除去器に通して得た
比較ガスを流して、SO2を赤外線吸収法により測
定する２光路式の自動車排ガス中のSO2分析計で
あつて、上記主サンプリング流路もしくはそれぞ
れの分岐流路に、酸化炉と、これの後段に位置す
る除湿器とを含む干渉成分前処理装置を装備した
ことを特徴とする自動車排ガス中のSO2分析計。 The main sampling flow path, which continuously collects automobile exhaust gas, is branched into two flow paths each having a cell, and the sample gas is passed through one cell, and the sample gas is passed through an SO 2 remover into the other cell. A two-light path type SO 2 analyzer in automobile exhaust gas that flows the obtained comparison gas and measures SO 2 by an infrared absorption method, the main sampling flow path or each branch flow path having an oxidation furnace; An analyzer for SO 2 in automobile exhaust gas, characterized in that it is equipped with an interfering component pretreatment device including a dehumidifier located downstream of the dehumidifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982125446U JPS5929748U (en) | 1982-08-18 | 1982-08-18 | SO2 analyzer in automobile exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982125446U JPS5929748U (en) | 1982-08-18 | 1982-08-18 | SO2 analyzer in automobile exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5929748U JPS5929748U (en) | 1984-02-24 |
| JPS6330995Y2 true JPS6330995Y2 (en) | 1988-08-18 |
Family
ID=30285599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982125446U Granted JPS5929748U (en) | 1982-08-18 | 1982-08-18 | SO2 analyzer in automobile exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5929748U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023282282A1 (en) | 2021-07-09 | 2023-01-12 | 株式会社島津製作所 | Gas measurement device |
-
1982
- 1982-08-18 JP JP1982125446U patent/JPS5929748U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5929748U (en) | 1984-02-24 |
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