JPH07218400A - Preprocessor - Google Patents
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- Publication number
- JPH07218400A JPH07218400A JP3526294A JP3526294A JPH07218400A JP H07218400 A JPH07218400 A JP H07218400A JP 3526294 A JP3526294 A JP 3526294A JP 3526294 A JP3526294 A JP 3526294A JP H07218400 A JPH07218400 A JP H07218400A
- Authority
- JP
- Japan
- Prior art keywords
- semipermeable membrane
- component
- ppd
- membrane dehumidifier
- scrubber
- 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.)
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は煙道の排ガス等のＮＯX
成分を分析するためのガス分析装置の前処理装置に関す
る。Such as the exhaust gas of the present invention the flue BACKGROUND OF THE NO X
The present invention relates to a pretreatment device for a gas analyzer for analyzing components.
【０００２】[0002]
【従来の技術】煙道の排ガスから低濃度（例えば数千ｐ
ｐｍ〜５０ｐｐｍ）のＮＯX 成分を分析する低濃度ＮＯ
X 計では、赤外線を吸収する水分が干渉成分となるた
め、電子冷却器（露点２．５℃）を用いてサンプルガス
の除湿がおこなわれる。2. Description of the Related Art Low concentration (for example, several thousand p
low concentration NO analyzing the NO X components Pm～50ppm)
In the X- meter, since moisture that absorbs infrared rays becomes an interference component, the sample gas is dehumidified using an electronic cooler (dew point 2.5 ° C).
【０００３】しかし、さらに濃度の低い（例えば２５ｐ
ｐｍ以下）ＮＯX 成分を精度よく計測する場合には、−
１０℃〜−２０℃の露点を有する除湿能力のすぐれた半
透膜除湿器（パーマピュアードライヤー、以下ＰＰＤと
いう）を用いて水分が除去される。However, the density is lower (eg 25p).
pm or less) of the NO X components accurately when measuring is -
Moisture is removed using a semipermeable membrane dehumidifier having a dew point of 10 ° C. to −20 ° C. and excellent dehumidification capability (Permapure Dryer, hereinafter referred to as PPD).
【０００４】[0004]
【発明が解決しようとする課題】しかるに、脱硝出口等
では、ＮＯX と反応しない残留ＮＨ3 の化合物が排出
し、これがＰＰＤのパーメーションチューブ（高分子
膜）に結晶化して詰りを生じさせ、除湿能力を低下させ
ることがあった。However, at the denitration outlet or the like, residual NH 3 compounds that do not react with NO X are discharged, and this is crystallized in the permeation tube (polymer film) of the PPD to cause clogging, The dehumidifying ability was sometimes reduced.
【０００５】このようなパーメーションチューブの目詰
りによる除湿能力の低下は、ＬＮＧを燃料とした場合の
サンプルガスの分析においても、その付臭剤中に含まれ
ているＳ成分によって同様に発生することが確認されて
いる。Such a decrease in dehumidifying ability due to clogging of the permeation tube also occurs in the analysis of the sample gas when LNG is used as a fuel due to the S component contained in the odorant. It has been confirmed.
【０００６】本発明はこのような実情に鑑みてなされ、
ＰＰＤの除湿能力を安定に維持できる前処理装置を提供
することを目的としている。The present invention has been made in view of such circumstances.
It is an object of the present invention to provide a pretreatment device capable of stably maintaining the dehumidifying ability of PPD.
【０００７】[0007]
【課題を解決するための手段】本発明は、上述の課題を
解決するための手段を以下のように構成している。すな
わち、ＮＯX 分析計に接続されるサンプルガス供給路に
半透膜除湿器が設けられているガス分析装置の前処理装
置にあって、前記半透膜除湿器の前段に、ＮＨ3 除去手
段、有機性化合物吸着手段および加熱手段を設けてなる
ことを特徴としている。The present invention has means for solving the above-mentioned problems as follows. That, in the pretreatment device for a gas analyzer semipermeable membrane dehumidifier to sample gas supply line connected to the NO X analyzer is provided, in front of the semi-permeable membrane dehumidifier, NH 3 removal means The organic compound adsorption means and the heating means are provided.
【０００８】[0008]
【作用】半透膜除湿器の前段で、ＮＨ3 成分や有機性化
合物が除去されるため、半透膜除湿器のパーメーション
チューブへの異物の結晶化が防がれ、また、加熱手段に
よって、サンプルガスのドレン化が防止されるため、高
い除湿能力を維持することができる。[Function] Since the NH 3 component and the organic compound are removed before the semipermeable membrane dehumidifier, crystallization of foreign substances into the permeation tube of the semipermeable membrane dehumidifier is prevented, and the heating means is used. Since the sample gas is prevented from being drained, a high dehumidifying ability can be maintained.
【０００９】[0009]
【実施例】以下に本発明の前処理装置の実施例を図面に
基づき詳細に説明する。図１はガス分析装置の全体構成
を示し、サンプルガスが流過する煙道１から導入したサ
ンプルガスをＮＯX 計２に供給するサンプルライン（サ
ンプルガス供給路）３におけるそのＮＯX 計２の前段に
は、干渉成分となる水分を除去するためのＰＰＤ４が設
けられている。Embodiments of the pretreatment apparatus of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the overall configuration of a gas analyzer, which is a sample line (sample gas supply path) 3 for supplying the sample gas introduced from the flue 1 through which the sample gas flows to the NO x meter 2 to the NO x meter 2. A PPD 4 for removing water that becomes an interference component is provided in the previous stage.
【００１０】そして、そのＰＰＤ４の上流側には、ＮＨ
3 除去手段であるＮＨ3 スクラバー５と有機性化合物吸
着手段である活性アルミナ６が設けられ、かつその活性
アルミナ６の前後には、加熱手段としてのホットホース
７が配設されている。On the upstream side of the PPD4, NH
An NH 3 scrubber 5 which is a means for removing 3 and an activated alumina 6 which is an adsorption means for an organic compound are provided, and a hot hose 7 as a heating means is disposed before and after the activated alumina 6.
【００１１】上述のＮＨ3 スクラバー５は、多孔質担体
にりん酸を含浸させたもので、ＮＯX を吸着せず、主と
して水分を含んだサンプルガス中の汚れ成分である無機
成分ガス（例えばＮＨ3 ）や水溶性の有機成分ガスを吸
着除去する。なお、このＮＨ3 スクラバー５に代えて水
バブラー装置や硫酸バブラー装置を用いてもよい。The above-mentioned NH 3 scrubber 5 is obtained by impregnating a porous carrier with phosphoric acid, does not adsorb NO X , and is an inorganic component gas (for example, NH which is a contaminant component in the sample gas containing mainly water). 3 ) Adsorb and remove water-soluble organic component gas. A water bubbler device or a sulfuric acid bubbler device may be used instead of the NH 3 scrubber 5.
【００１２】また、活性アルミナ６は、有機成分からな
る汚れ物質、例えば未燃焼含酸成分（カルボン酸等）、
特にミスト状の物質の除去に有効であり、ＬＮＧ中の付
臭成分であるＳ成分を除くこともできる。なお、この活
性アルミナ６に代えて、モレキュラシーブを用いてもよ
い。The activated alumina 6 is a dirt substance composed of an organic component, such as an unburned acid-containing component (carboxylic acid, etc.),
In particular, it is effective for removing mist-like substances, and it is possible to remove the S component that is the odorizing component in LNG. A molecular sieve may be used instead of the activated alumina 6.
【００１３】ホットホース７はテフロン管の外周にシー
ズヒータをスパイラル状に巻回したもので、別途、スペ
ースを要さず内部を均熱できるものである。なお、ホッ
トホース７に代えて、その他の電気的加熱手段等を用い
てもよい。The hot hose 7 is a Teflon tube having a sheathed heater wound in a spiral shape on the outer periphery thereof, so that the inside can be uniformly heated without requiring a separate space. Instead of the hot hose 7, other electric heating means or the like may be used.
【００１４】以上のような構成により、ＰＰＤ４の前段
で、ＮＨ3 スクラバー５によりＮＨ3 成分が、また、活
性アルミナ６によってＳ成分等を含む有機性化合物が除
去され、かつホットホース７によってサンプルガスのド
レン化が防止される。従って、ＰＰＤ４の高い除湿能力
が安定に保持され、低い濃度のＮＯX 成分をもＮＯX計
２で高い精度で計測することができる。With the above structure, the NH 3 scrubber 5 removes the NH 3 component, the activated alumina 6 removes the organic compound containing the S component and the like, and the hot hose 7 removes the sample gas before the PPD 4. Drainage is prevented. Therefore, the high dehumidifying capacity of the PPD 4 is stably maintained, and the NO X component of low concentration can be measured with high accuracy by the NO X meter 2.
【００１５】ガス分析装置のその他の構成について説明
すると、９はプローブ、１０は１次フィルタ、１１はボ
ールバルブ、１２はウェットフィルタ、１３はウェット
フィルタ、１４はＮＯX コンバータ、１５は２次フィル
タ、１６はエアーフィルタ、１７は三方電磁弁、１８は
ニードルバルブ、１９はサンプリングポンプ、２０はド
レンセパレータ、２１はストップバルブ、２２は減圧
弁、２３は流量計、２４は二方電磁弁、２５は圧力調整
器、２６はゼロガスボンベ、２７はスパンガスボンベ、
２８はＮ2 ボンベ、２９はドレントラップ、３０は定圧
トラップ、３１は給水タンク、３２は給水ポンプ、３３
はバッファタンク、４１はサンプル入口、４２はサンプ
ル出口、４３は計装エアー入口、４４は計装エアー出
口、４５はドレン出口である。[0015] Referring to the other configuration of the gas analyzer, the probe 9, the primary filter 10, 11 is a ball valve, 12 is wet filter, 13 wet filter 14 NO X converter, 15 second-order filter , 16 is an air filter, 17 is a three-way solenoid valve, 18 is a needle valve, 19 is a sampling pump, 20 is a drain separator, 21 is a stop valve, 22 is a pressure reducing valve, 23 is a flow meter, 24 is a two-way solenoid valve, 25 Is a pressure regulator, 26 is a zero gas cylinder, 27 is a span gas cylinder,
28 is an N 2 cylinder, 29 is a drain trap, 30 is a constant pressure trap, 31 is a water tank, 32 is a water pump, 33
Is a buffer tank, 41 is a sample inlet, 42 is a sample outlet, 43 is an instrumentation air inlet, 44 is an instrumentation air outlet, and 45 is a drain outlet.
【００１６】上述のような装置にて、サンプルガスは、
ウェットフィルタ１２，１３で周囲温度までドレンが分
離・排出され、ＮＨ3 スクラバー５にてＮＨ3 化合物が
吸着除去され、ポンプ１９によって吸引され、ドレンセ
パレータ２０によってさらにドレンが分離された後、ホ
ットホース７によって加熱され、ドレン化が防止され
る。そして、活性アルミナ６に通されて有機性化合物が
吸着された後、ＰＰＤ４に導入され、除湿される。In the apparatus as described above, the sample gas is
The drain is separated and discharged to the ambient temperature by the wet filters 12 and 13, the NH 3 compound is adsorbed and removed by the NH 3 scrubber 5, sucked by the pump 19, and further drained by the drain separator 20, and then the hot hose. It is heated by 7 and draining is prevented. Then, after passing through the activated alumina 6 to adsorb the organic compound, it is introduced into the PPD 4 and dehumidified.
【００１７】従って、ＰＰＤ４に導入されるサンプルガ
スは、ＮＨ3 化合物や有機性化合物、ドレン等が除去さ
れているので高い除湿能力が発揮される。なお、ＮＨ3
スクラバー５によって、ＮＯX コンバータ１４のＮＨ3
被毒によるコンバータ触媒の劣化防止も図られる。Therefore, the sample gas introduced into the PPD 4 has a high dehumidifying ability because NH 3 compounds, organic compounds, drains, etc. are removed. In addition, NH 3
With the scrubber 5, NH 3 of the NO X converter 14
It is also possible to prevent deterioration of the converter catalyst due to poisoning.
【００１８】ちなみに、上述のＮＨ3 スクラバー５と活
性アルミナ６およびホットホース７の配置位置について
は、実施例に限定されるものではなく、適宜に設定され
てよく、例えば、活性アルミナ６をＮＨ3 スクラバー５
の上流側に設けてもよい。Incidentally, the arrangement positions of the above-mentioned NH 3 scrubber 5, activated alumina 6 and hot hose 7 are not limited to those in the embodiment, and may be set appropriately. For example, activated alumina 6 may be replaced with NH 3. Scrubber 5
It may be provided on the upstream side of.
【００１９】[0019]
【発明の効果】以上説明したように、本発明によれば、
ガス分析装置における半透膜除湿器の前段に、ＮＨ3 除
去手段、有機性化合物吸着手段および加熱手段を設けた
ので、半透膜除湿器の除湿能力を高く保つことができ、
高い精度のＮＯX 分析を維持することが可能となる。As described above, according to the present invention,
Since the NH 3 removing means, the organic compound adsorbing means and the heating means are provided before the semipermeable membrane dehumidifier in the gas analyzer, the dehumidification capacity of the semipermeable membrane dehumidifier can be kept high.
It is possible to maintain a highly accurate NO X analysis.
【図１】本発明の前処理装置の一実施例を示すガス分析
装置の全体構成図である。FIG. 1 is an overall configuration diagram of a gas analyzer showing an embodiment of a pretreatment apparatus of the present invention.
２…ＮＯX 分析計、３…サンプルガス供給路、４…半透
膜除湿器、５…ＮＨ3除去手段、６…有機性化合物吸着
手段、７…加熱手段。2 ... NO X analyzer, 3 ... Sample gas supply path, 4 ... Semipermeable membrane dehumidifier, 5 ... NH 3 removing means, 6 ... Organic compound adsorbing means, 7 ... Heating means.
Claims (1)
供給路に半透膜除湿器が設けられているガス分析装置の
前処理装置であって、前記半透膜除湿器の前段に、ＮＨ
3 除去手段、有機性化合物吸着手段および加熱手段を設
けてなることを特徴とする前処理装置。1. A pretreatment device for a gas analysis device, wherein a semipermeable membrane dehumidifier is provided in a sample gas supply path connected to a NO x analyzer, wherein an NH 3 is provided in front of the semipermeable membrane dehumidifier.
(3) A pretreatment device comprising a removing means, an organic compound adsorbing means, and a heating means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6035262A JP3064175B2 (en) | 1994-02-07 | 1994-02-07 | Pretreatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6035262A JP3064175B2 (en) | 1994-02-07 | 1994-02-07 | Pretreatment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07218400A true JPH07218400A (en) | 1995-08-18 |
| JP3064175B2 JP3064175B2 (en) | 2000-07-12 |
Family
ID=12436897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6035262A Expired - Fee Related JP3064175B2 (en) | 1994-02-07 | 1994-02-07 | Pretreatment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3064175B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006010555A (en) * | 2004-06-28 | 2006-01-12 | Horiba Ltd | Pretreatment apparatus for gas analysis |
-
1994
- 1994-02-07 JP JP6035262A patent/JP3064175B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006010555A (en) * | 2004-06-28 | 2006-01-12 | Horiba Ltd | Pretreatment apparatus for gas analysis |
| JP4564790B2 (en) * | 2004-06-28 | 2010-10-20 | 株式会社堀場製作所 | Pretreatment apparatus and method for gas analysis |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3064175B2 (en) | 2000-07-12 |
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