JPS6158773B2 - - Google Patents
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- Publication number
- JPS6158773B2 JPS6158773B2 JP56019374A JP1937481A JPS6158773B2 JP S6158773 B2 JPS6158773 B2 JP S6158773B2 JP 56019374 A JP56019374 A JP 56019374A JP 1937481 A JP1937481 A JP 1937481A JP S6158773 B2 JPS6158773 B2 JP S6158773B2
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- JP
- Japan
- Prior art keywords
- sample gas
- gas
- inner tube
- probe
- tube
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【発明の詳細な説明】
この発明は煙道ガス中のSO2を連続測定する赤
外線式SO2分析装置、とくにそのNH3除去に関す
る改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an infrared SO 2 analyzer for continuously measuring SO 2 in flue gas, and in particular to improvements regarding NH 3 removal.
煙道ガス中のSO2を赤外線式SO2分析計で連続
的に測定する場合、まず、試料ガスをNH3除去装
置に通してNH3を除去し、続いて脱水装置で水分
を除去して乾燥ガスにしてから赤外線式SO2分析
計に送る。 When continuously measuring SO 2 in flue gas using an infrared SO 2 analyzer, the sample gas is first passed through an NH 3 removal device to remove NH 3 , and then water is removed using a dehydration device. It is made into a dry gas and then sent to an infrared SO 2 analyzer.
NH3を除去するのは、これが共存すると脱水過
程で生ずる凝縮水にNH3が溶解し、さらにこれに
よつて生じた水酸化アンモニウムにSO2が吸収さ
れて試料ガス中のSO2濃度を低下させ、測定に大
きな誤差を与えるからである。また脱水するの
は、測定ガス中に水分が共存すると赤外線式SO2
分析計において水とSO2との赤外線吸収帯が重な
り、干渉を生じて測定に誤差を与えるからであ
る。 NH 3 is removed because if it coexists, NH 3 will dissolve in the condensed water generated during the dehydration process, and SO 2 will be absorbed by the resulting ammonium hydroxide, reducing the SO 2 concentration in the sample gas. This is because it causes large errors in measurements. In addition, dehydration occurs when moisture coexists in the measurement gas using the infrared SO 2
This is because the infrared absorption bands of water and SO 2 overlap in the analyzer, causing interference and causing measurement errors.
そこで、煙道ガス中にNH3が共存するおそれが
ある場合には、脱水処理を行なう前にNH3を除去
処理する。その除去方法として従来行なわれてい
るのは、酸による吸収法と、NH3とO2とを反応さ
せてNOとH2Oとに分解する方法である。 Therefore, if there is a possibility that NH 3 coexists in the flue gas, NH 3 is removed before dehydration. Conventionally used methods for removing it are an absorption method using an acid and a method of reacting NH 3 and O 2 to decompose it into NO and H 2 O.
酸による吸収法は、加熱した不揮発性の酸、例
えばリン酸等に試料ガスを通してNH3を吸収した
り、この酸を担体例えば硅藻土等に含浸させ、試
料ガスをこれと接触させてNH3を吸収除去したり
する。しかし、この方法は反応が飽和してくると
吸収効率が悪くなり、長時間の連続測定に備える
にはその保守点検が欠かせない。また、NH3とO2
とを反応させてNOとH2Oとに分解する方法は、
その反応条件として700℃〜800℃の温度を必要と
し、したがつて、熱量の大きなヒータを必要とす
るだけでなく、共存ガスによる二次的な反応を起
こすおそれもあつて一般的でない。 In the acid absorption method, the sample gas is passed through a heated nonvolatile acid such as phosphoric acid to absorb NH 3 , or the acid is impregnated into a carrier such as diatomaceous earth, and the sample gas is brought into contact with it to absorb NH 3 . Absorb and remove 3 . However, with this method, absorption efficiency deteriorates when the reaction becomes saturated, and maintenance and inspection are essential to prepare for long-term continuous measurements. Also, NH3 and O2
The method of reacting with and decomposing it into NO and H 2 O is as follows:
The reaction conditions require a temperature of 700°C to 800°C, which not only requires a heater with a large amount of heat, but also poses a risk of secondary reactions caused by coexisting gases, which is not common.
この発明は、煙道ガス中に存在するNOを利用
し、NH3とNOとによる還元反応を煙道ガスの採
取後に行なわせることによつて、試料ガス中の
NH3を除去するようにしたものである。すなわ
ち、この発明は煙道ガスから採取した試料ガスを
赤外線式SO2分析計に送る試料ガス流路中に、試
料ガス中に含まれるNH3を同じく試料ガス中に含
まれるNOと反応させてN2とH2Oとに変換するた
めの触媒とこの試料ガスを150℃ないし450℃に加
熱するヒータとをもつ反応部を設けてなる赤外線
式SO2分析装置にかかるものである。 This invention utilizes NO present in the flue gas and performs a reduction reaction between NH 3 and NO after the flue gas is collected, thereby reducing the amount of gas in the sample gas.
It is designed to remove NH 3 . In other words, the present invention involves reacting NH 3 contained in the sample gas with NO also contained in the sample gas in the sample gas flow path that sends the sample gas collected from the flue gas to an infrared SO 2 analyzer. This is an infrared SO 2 analyzer equipped with a reaction section that has a catalyst for converting it into N 2 and H 2 O and a heater that heats the sample gas to 150°C to 450°C.
以下、図面に基づいてこの発明の実施例を説明
する。図はNH3除去機構を内蔵してなるガスサン
プリングプローブの内部構造を示す部分側断面図
である。この図において、１０は煙道壁、２０は
プローブ本管、２４はNH3とＮとをN2とH2Oとに
変換させる触媒を収容する内管，３０はこのプロ
ーブを赤外線式SO2分析計（図示せず）に接続す
る保熱配管，３５はこのプローブ本管２０を覆う
断熱材である。 Embodiments of the present invention will be described below based on the drawings. The figure is a partial side sectional view showing the internal structure of a gas sampling probe with a built-in NH 3 removal mechanism. In this figure, 10 is a flue wall, 20 is a probe main tube, 24 is an inner tube containing a catalyst for converting NH 3 and N into N 2 and H 2 O, and 30 is an infrared SO 2 probe. A heat retaining pipe 35 connected to an analyzer (not shown) is a heat insulating material that covers this probe main pipe 20.
プローブ本管２０は、耐蝕性に優れた金属材質
からなる管体として形成されており、その一端に
はフランジ２１を介して煙道ガスＧを吸引する採
取管２２を有し、他端にこれと螺合する断面コ字
形の円筒形の蓋部２３を螺入して、プローブ本管
２０内腔内に試料ガス流路を形成している。 The probe main pipe 20 is formed as a pipe body made of a metal material with excellent corrosion resistance, and has a sampling pipe 22 at one end for sucking the flue gas G through a flange 21, and a sampling pipe 22 for sucking the flue gas G at the other end. A cylindrical lid portion 23 with a U-shaped cross section is screwed into the probe main tube 20 to form a sample gas flow path within the inner cavity of the probe main tube 20.
プローブ本管２０内腔部中央には、試料ガス流
路に沿つて内管２４とこれを包被するフイルタ套
管２５とが設けてある。 At the center of the inner cavity of the probe main tube 20, an inner tube 24 and a filter sleeve 25 covering the inner tube 24 are provided along the sample gas flow path.
内管２４は、その一端からプローブ内腔内の試
料ガスを導入し、その管内部において、試料ガス
中のNH3とNOとをその管内に収容する触媒２６
でもつてN2とH2Oとに変換させるものである。こ
の内管２４は、それ自身を触媒体で形成しても良
いし、あるいは耐蝕性に優れた金属材質で形成し
て、その管内に粒状，ペレツト状或はハニカム状
の触媒２６を収納しても良い。後者の場合は、図
示の如く、前記蓋部２３に対面する端部を着脱自
在のキヤツプ２７で封じ、他端部を前記保熱配管
３０のエルボ部３１にネジ込んで固定する。キヤ
ツプ２７で封ずるのは、触媒２６の固定とその脱
落防止のためである。そして、内管２４の非固定
端周面に試料ガスを導入するガス導入通孔２８を
多数設け、ここから除塵された試料ガスを導入す
る。ガス導入通孔２８をプローブ本管２０内腔内
の試料ガス流路終端部に設けたのは、吸引する試
料ガスをフイルタ套管２５全面に透過させるとと
もに、吸引した試料ガスを内管２４全長に亘つて
流通させ、試料ガスと触媒２６とを充分接触させ
るためである。 The inner tube 24 introduces the sample gas in the probe lumen from one end thereof, and has a catalyst 26 inside the tube that accommodates NH 3 and NO in the sample gas.
However, it is converted into N 2 and H 2 O. The inner tube 24 itself may be made of a catalyst material, or may be made of a metal material with excellent corrosion resistance, and a catalyst 26 in the form of particles, pellets, or honeycombs may be housed within the tube. Also good. In the latter case, as shown in the figure, the end facing the lid part 23 is sealed with a detachable cap 27, and the other end is screwed into the elbow part 31 of the heat retaining pipe 30 and fixed. The purpose of sealing with the cap 27 is to fix the catalyst 26 and prevent it from falling off. A large number of gas introduction holes 28 for introducing the sample gas are provided on the circumferential surface of the non-fixed end of the inner tube 24, and the sample gas from which dust has been removed is introduced through these holes. The gas introduction hole 28 is provided at the end of the sample gas flow path in the inner cavity of the probe main tube 20 to allow the sample gas to be aspirated to pass through the entire surface of the filter sleeve 25, and to allow the sample gas to be aspirated to pass through the entire length of the inner tube 24. This is to allow sufficient contact between the sample gas and the catalyst 26.
ここで用いる触媒２６は、試料ガスに含まれる
NH3とNOとを150℃ないし450℃の温度範囲で
4NH3＋6NO→5N2＋6H2O
又は、4NH3＋4NO＋O2→4N2＋6H2O
なる反応を起こさせるもので、適当な金属酸化物
から選ばれる。尚、図示のものは、ハニカム状に
成形した触媒２６を管路に沿つて収納した状態を
示す。 The catalyst 26 used here is contained in the sample gas.
It causes the reaction between NH 3 and NO in the temperature range of 150℃ to 450℃ as follows: 4NH 3 +6NO→5N 2 +6H 2 O or 4NH 3 +4NO+O 2 →4N 2 +6H 2 O. To be elected. Note that the illustrated example shows a state in which a honeycomb-shaped catalyst 26 is housed along a pipe.
上記反応におけるNOは煙道ガス中に必ず含ま
れており、これを利用してNH3を分解せしめるこ
とは試料ガス中にNH3と反応させるための余分な
物（例えば酸）を介在せしめる必要がなく、それ
だけ測定精度を向上させることとができる。ま
た、この反応が触媒によるものであるために、酸
による化学反応に比べてかなり長時間に亘つて使
用することができ、その保守点検も省略できる利
点がある。 NO in the above reaction is always contained in the flue gas, and using this to decompose NH 3 requires the presence of an extra substance (e.g. acid) in the sample gas to react with NH 3 . The measurement accuracy can be improved accordingly. Furthermore, since this reaction is catalytic, it can be used for a considerably longer time than a chemical reaction using an acid, and has the advantage that maintenance and inspection can be omitted.
フイルタ套管２５は耐蝕性，耐熱性に優れた材
質から形成されており、その一端は前記蓋部２３
の内面に形成した係合溝２９を係合し、他端は、
保熱配管３０のエルボ部３１外周に設けた係合溝
３２と係合して、その套管中心に位置する内管２
４を包被している。このフイルタ套管２５の入れ
替えは、プローブ本管２０の蓋部２３を開放する
ことによつて容易に行なうことができる。また、
このフイルタ套管２５をプローブ本管２０に沿つ
て設けているので、試料ガスの透過面積を広く取
ることができ、それだけその耐用期間も長くする
ことができる。 The filter sleeve 25 is made of a material with excellent corrosion resistance and heat resistance, and one end thereof is connected to the lid portion 23.
The other end engages with the engagement groove 29 formed on the inner surface of the
The inner tube 2 engages with the engagement groove 32 provided on the outer periphery of the elbow portion 31 of the heat retention pipe 30 and is positioned at the center of the sleeve.
It covers 4. This filter sleeve 25 can be easily replaced by opening the lid 23 of the probe main tube 20. Also,
Since the filter sleeve 25 is provided along the probe main pipe 20, the permeation area for the sample gas can be increased, and its service life can be extended accordingly.
保熱配管３０は、試料ガスを液化させないよう
にこれを加熱しながらその後段に設けるドレンセ
パレータ（図示せず）に送るもので、その先端は
プローブ本管２０のフランジ２１寄の管壁を貫通
して、そのプローブ内腔内にエルボ部３１を形成
している。 The heat retention pipe 30 heats the sample gas so as not to liquefy it and sends it to a drain separator (not shown) provided at the subsequent stage, and its tip penetrates the pipe wall near the flange 21 of the probe main pipe 20. An elbow portion 31 is formed within the probe lumen.
このエルボ部３１は、特に耐蝕性に優れた金属
材質で形成されており、その端部は内管２４と螺
合して内管２４をプローブ内腔部内の中心軸上に
位置させている。また、このエルボ部３１の前記
採取管２２と対向する対向面は、円錐形に形成さ
れて、試料ガスの圧力損失を軽減している。 This elbow portion 31 is made of a metal material with particularly excellent corrosion resistance, and its end portion is threadedly engaged with the inner tube 24 to position the inner tube 24 on the central axis within the probe lumen. Further, the opposing surface of the elbow portion 31 that faces the sampling tube 22 is formed into a conical shape to reduce pressure loss of the sample gas.
尚、３３は、この保熱配管３０を加熱するヒー
タ，３４はその電源である。 In addition, 33 is a heater that heats this heat retention piping 30, and 34 is its power source.
ヒータ３５は，プローブ本管２０外側に位置し
てプローブ内腔内を加熱するもので、これと接触
させて設けた温度センサ３６とヒータ温度を制御
する温度制御装置３７とで所定温度に制御され
る。 The heater 35 is located outside the probe main tube 20 and heats the interior of the probe, and is controlled to a predetermined temperature by a temperature sensor 36 provided in contact with the heater 35 and a temperature control device 37 that controls the heater temperature. Ru.
この場合、煙道ガスの採取位置にもよるが、煙
道ガスＧの温度は大体100℃ないし300℃であり、
一方、NH3とNOとをN2とH2Oとに変換する反応
温度は150℃ないし450℃であるので、この反応を
起こさせるための加熱も補助的なもので良く、従
来と比べてNH3除去に要する熱をかなり節約でき
る。しかも、この温度範囲は、煙道ガス温度と大
部分重複しているので、SO2と他の共存ガスとの
反応も起こさない。 In this case, the temperature of the flue gas G is approximately 100℃ to 300℃, depending on the sampling location of the flue gas.
On the other hand, since the reaction temperature for converting NH 3 and NO into N 2 and H 2 O is 150°C to 450°C, the heating required to cause this reaction only needs to be supplementary, and compared to conventional methods, Significant savings in heat required for NH 3 removal can be achieved. Moreover, since this temperature range largely overlaps with the flue gas temperature, reactions between SO 2 and other coexisting gases also do not occur.
このようなNH3除去装置において、採取管２２
を煙道壁１０に挿入し、保熱配管３０をプローブ
後段に設けた吸引装置（図示せず）に接続して吸
引すると、煙道ガスは採取管２２を通つてプロー
ブ本管２０内腔のフイルタ套管２５に到り、ここ
で除塵されてさらに内管２４のガス導入通孔２８
に吸引される。この時プローブ本管２０内腔は、
試料ガスが保有する熱とともに、ヒータ３５によ
る加熱で150℃〜450℃に維持されているので、吸
引された試料ガス中のNH3とNOは内管２４内の
触媒２６によつてN2とH2Oとに変換される。そし
て、変換されたN2とH2Oとは、SO2を含むその他
の共存ガスとともに、ドレンセパレータ，脱水装
置（図示せず）等を経て赤外線式SO2分析計に導
入される。 In such an NH 3 removal device, the collection tube 22
is inserted into the flue wall 10 and the heat retention pipe 30 is connected to a suction device (not shown) provided at the rear stage of the probe to suck the flue gas, the flue gas passes through the sampling pipe 22 and enters the inner lumen of the probe main pipe 20. The gas reaches the filter sleeve 25, where the dust is removed, and then the gas is introduced into the gas inlet hole 28 of the inner tube 24.
is attracted to. At this time, the inner lumen of the probe main tube 20 is
Together with the heat held by the sample gas, it is maintained at 150°C to 450°C by heating by the heater 35, so NH 3 and NO in the sample gas that is sucked are converted to N 2 by the catalyst 26 in the inner tube 24. Converted to H 2 O. Then, the converted N 2 and H 2 O, together with other coexisting gases including SO 2 , are introduced into an infrared SO 2 analyzer through a drain separator, a dehydrator (not shown), and the like.
この発明は以上のように構成されているので、
酸によるNH3除去に比してその除去効果が良く、
とくに、化学反応の飽和による除去効率の低下を
来たさないので長時間の使用に耐え得る。また、
NH3にO2による酸化反応は、700℃ないし800℃で
なければ起こらないが、このNH3のNOによる酸
化反応は、150℃ないし450℃で起こるので、その
ための加熱用ヒータも熱量の小さいものですむ。
そのうえ、NH3とNOとの還元反応は、採取され
た試料ガスが保有する熱によつても起こり得るの
で、SO2と他の共存ガスとの二次的な反応を起こ
すおそれがなく、更に、生成するN2は不活性で
あり、かつ、赤外線を吸収しないので、測定に誤
差を生じさせない。 Since this invention is configured as described above,
Its removal effect is better than that of acid-based NH 3 removal.
In particular, since the removal efficiency does not decrease due to saturation of the chemical reaction, it can withstand long-term use. Also,
The oxidation reaction of NH 3 with O 2 only occurs at 700°C to 800°C, but this oxidation reaction of NH 3 with NO occurs at 150°C to 450°C, so the heater for that purpose also has a small amount of heat. It's just a thing.
Furthermore, the reduction reaction between NH 3 and NO can also occur due to the heat possessed by the collected sample gas, so there is no risk of secondary reactions between SO 2 and other coexisting gases. The N 2 produced is inert and does not absorb infrared rays, so it does not cause errors in measurements.
また、煙道ガスの採取と同時に試料ガス中の
NH3を除去するので、煙道ガスが保有する熱をそ
のまま還元反応に要する熱として利用でき、NH3
除去のための再加熱も少なくてすむ。また１つの
プローブ機構内に粉塵ろ過機構，NH3除去機構を
併せもたせたので、これらの保守点検を同時に行
なうことができる等の効果を奏する。 In addition, at the same time as flue gas sampling,
Since NH 3 is removed, the heat held by the flue gas can be directly used as the heat required for the reduction reaction, and NH 3
Reheating for removal is also less. Furthermore, since a dust filtration mechanism and an NH 3 removal mechanism are included in one probe mechanism, maintenance and inspection of these mechanisms can be carried out at the same time.
図面は、この発明にかかる赤外線式SO2分析装
置のNH3除去装置部分の実施例の内部構造を示す
部分側断面図である。
２０……プローブ本管、２４……内管、２５…
…フイルタ套管、２６……触媒、２８……ガス導
入通孔、３０……保熱配管、３５……ヒータ。
The drawing is a partial side sectional view showing the internal structure of an embodiment of the NH 3 removal device portion of the infrared SO 2 analyzer according to the present invention. 20... Probe main tube, 24... Inner tube, 25...
... Filter sleeve, 26 ... Catalyst, 28 ... Gas introduction hole, 30 ... Heat retention piping, 35 ... Heater.
Claims (1)
SO2分析計に送る試料ガス流路中に、試料ガス中
に含まれるNH3を同じく試料ガス中に含まれる
NOと反応させて、N2とH2Oとに分解するための
触媒と、この試料ガスを150℃ないし450℃に加熱
するヒータとをもつ反応部を設けてなる赤外線式
SO2分析装置。 ２ 煙道ガスを採取するガスサンプリングプロー
ブのプローブ本管２０内腔部内に、フイルタ套管
２５で包被される内管２４を設け、この内管２４
の前記プローブ本管２０の内腔部後端部に対応す
る位置において内管２４へのガス導入通孔２８を
設けるとともに、その内管２４の後端部を保熱配
管３０へ接続して、この内管２４内に試料ガス中
に含まれるNH3を同じく試料ガス中に含まれる
NOと反応させてN2とH2Oとに分解するための触
媒２６を組み込むとともに、プローブ内腔内を
150℃ないし450℃に加熱するヒータ３５をプロー
ブ本管２０内に配設しこれを反応部とした特許請
求の範囲第１項記載の赤外線式SO2分析装置。[Claims] 1. Infrared ray method for sample gas collected from flue gas
NH 3 contained in the sample gas is also contained in the sample gas in the sample gas flow path sent to the SO 2 analyzer.
An infrared type that is equipped with a reaction section that has a catalyst that reacts with NO and decomposes it into N 2 and H 2 O, and a heater that heats this sample gas to 150°C to 450°C.
SO2 analyzer. 2. An inner tube 24 covered with a filter sleeve 25 is provided in the inner cavity of the probe main tube 20 of the gas sampling probe for sampling flue gas, and the inner tube 24 is covered with a filter sleeve 25.
A gas introduction hole 28 is provided to the inner tube 24 at a position corresponding to the rear end of the inner cavity of the probe main tube 20, and the rear end of the inner tube 24 is connected to the heat retention piping 30. In this inner tube 24, NH 3 contained in the sample gas is also collected.
In addition to incorporating a catalyst 26 for reacting with NO to decompose it into N 2 and H 2 O, the inside of the probe lumen is
2. The infrared SO 2 analyzer according to claim 1, wherein a heater 35 for heating to 150° C. to 450° C. is disposed within the probe main pipe 20, and this is used as a reaction section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1937481A JPS57133339A (en) | 1981-02-10 | 1981-02-10 | Infrared rays system so2 analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1937481A JPS57133339A (en) | 1981-02-10 | 1981-02-10 | Infrared rays system so2 analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57133339A JPS57133339A (en) | 1982-08-18 |
| JPS6158773B2 true JPS6158773B2 (en) | 1986-12-13 |
Family
ID=11997545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1937481A Granted JPS57133339A (en) | 1981-02-10 | 1981-02-10 | Infrared rays system so2 analyzer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57133339A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7442555B2 (en) * | 2004-12-28 | 2008-10-28 | Nair Balakrishnan G | Ammonia gas sensor method and device |
| CN103364350B (en) * | 2013-07-02 | 2015-10-28 | 中国海洋大学 | Flue gas on-line measuring device |
| CN104764649B (en) * | 2015-03-31 | 2018-11-06 | 南京埃森环境技术有限公司 | A kind of low-concentration flue gas detection pretreatment water-eliminating method and device and its flue gas inspection application system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49114573A (en) * | 1973-03-06 | 1974-11-01 | ||
| JPS5523086B2 (en) * | 1973-03-26 | 1980-06-20 | ||
| JPS51124492A (en) * | 1975-04-22 | 1976-10-29 | Sumitomo Chem Co Ltd | Continuous analysis of sulfurous acid gas coexisting with ammonium gas |
-
1981
- 1981-02-10 JP JP1937481A patent/JPS57133339A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57133339A (en) | 1982-08-18 |
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