Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
JP3656441B2 - Automatic drainage analyzer - Google Patents
[go: Go Back, main page]

JP3656441B2 - Automatic drainage analyzer - Google Patents

Automatic drainage analyzer Download PDF

Info

Publication number
JP3656441B2
JP3656441B2 JP36775898A JP36775898A JP3656441B2 JP 3656441 B2 JP3656441 B2 JP 3656441B2 JP 36775898 A JP36775898 A JP 36775898A JP 36775898 A JP36775898 A JP 36775898A JP 3656441 B2 JP3656441 B2 JP 3656441B2
Authority
JP
Japan
Prior art keywords
sample
gas
liquid
processing container
storage tank
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 - Lifetime
Application number
JP36775898A
Other languages
Japanese (ja)
Other versions
JP2000193656A (en
Inventor
富男 川島
俊治 安西
茂行 太田
篤 川村
豊文 吉田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toagosei Co Ltd
Original Assignee
Toagosei Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toagosei Co Ltd filed Critical Toagosei Co Ltd
Priority to JP36775898A priority Critical patent/JP3656441B2/en
Publication of JP2000193656A publication Critical patent/JP2000193656A/en
Application granted granted Critical
Publication of JP3656441B2 publication Critical patent/JP3656441B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Sampling And Sample Adjustment (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、排水の分析装置であり、特に、プロセス排水、地下水、井戸水等に含有するハロゲン化炭化水素を自動分析する装置に関する。
【0002】
【従来の技術】
従来、プロセス排水等に含有のハロゲン化炭化水素(ジクロロメタン、トリクロロエチレン、テトラクロロエチレン等)は、JISK0125によるヘッドスペース・ガスクロマトグラフ法がある。この方法は採取した試料液をバイアル瓶で、25℃で気液平衡状態にした後、ガス部をガスクロマトグラフで分析する方法である。
又、試料液中に空気や窒素を吹き込むバブリング法は、含有のハロゲン化炭化水素を前記空気で追い出して、そのガスを分析する方法である。
又、試薬とハロゲン化炭化水素を反応させ、生成する蛍光縮合物を測定する方法がある。
【0003】
【発明が解決しようとする課題】
前記分析方法は、いずれも試料液を採取したり、気液平衡状態まで昇温したり等の作業は、人手で行っている。
また、前記ヘッドスペース・ガスクロマトグラフ法は、気液平衡状態になるまで、約30分以上かかり、試料採取から分析終了まで約2時間を要する。
バブリング法は、試料液に空気や窒素ガスを吹き込むために、ハロゲン化炭化水素濃度が希釈され、正確な濃度分析を得ることができない。
蛍光縮合物を測定する方法は、試薬と反応させるために、反応可能な物質はハロゲン化炭化水素に限定され、その他の物質の測定には不適である。
以上のように、従来の分析方法は、何れも、短時間に且つ精度よく分析することが困難である。
そこで、本発明は、かかる課題を解消する自動排水分析装置を提供するものである。
【0004】
【課題を解決するための手段】
請求項1の自動排水分析装置は、制御装置を介して、サンプリング工程から順次、試料液の供給工程、試料液の処理工程、試料ガスの送気工程、分析工程の処理をする自動化を図るものであり、時間的、労力面において経済性に富む。又、試料液中のハロゲン化炭化水素を分析するものであり、この気液平衡温度を35゜C〜60゜Cに設定することによって、各成分の蒸気圧が高くなり、分析感度が向上する。
又、請求項2の自動排水分析装置は、請求項1の自動排水分析装置において、サンプル保管槽と試料処理容器の間にフィルタを設け、このフィルタを洗浄水を介して洗浄可能に構成してあることによって、洗浄したフィルタを通過した試料液で分析できる。
【0005】
請求項3の自動排水分析装置は、請求項1又は請求項2の自動排水分析装置において、試料処理容器に媒体を注水して、平衡状態の試料ガスを分析機器に送ることによって分析を行う。
【0006】
【発明の実施の態様】
本発明の実施の形態を図を参照して説明する。図1はプロセス排水等に含有のハロゲン化炭化水素(ジクロロメタン、トリクロロエチレン、テトラクロロエチレン等)の自動排水分析装置の全体図であり、サンプリング部、試料液処理部、分析部及び制御部で構成する。
先ず、サンプリング部について説明すると、サンプル保管槽2は試料液を貯留するものであり、底部2aが尖塔状で排出したとき残液が残らない形状の筒体である。
又、プロセス排水等から試料液ポンプ1等を介して、前記サンプル保管槽2に試料液を送液する入口管1aが、サンプル保管槽2の上部に接続してある。
【0007】
前記サンプル保管槽2の底部には、逆U字状の循環排出管3が設置してあり、この頂部3aがサンプル保管槽の液位となる。又、サンプル保管槽2の底部にはドレン電磁弁Aを介して排出管4が設けてある。
尚、サンプル保管槽2には、常時多量の試料液を流し、循環排出管3よりオーバーフローさせており、サンプル保管槽2の滞留時間を短くしているので、試料液の入れ替えが早くでき、試料処理容器10にはいつも新しい試料液の供給可能である。
又、前記サンプル保管槽2の液位のほぼ中央となる位置には、異物を除去するフィルタ5が取り付けてあり、試料液電磁弁Bを介して、試料処理容器10に、ヘッド差で供給可能な供給管7が設けてある。
尚、前記フィルタ5の下流側(試料液電磁弁Bの上流側)には、洗浄水電磁弁Cを介して洗浄管6が接続してあり、この洗浄液によって、前記フィルタ5の洗浄を可能にする。
又、フィルタ5の下流側の供給管7には、必ずしも必要でない、試料ガスの送気に使用する水道管18が、水道水電磁弁Gを介して接続してある。
【0008】
次に、試料液処理部の構成について説明すると、前記試料処理容器10は50〜2000mlの容量であり、後述する分析機器(ガスクロマトグラフ)20に到る送気管15の置換が十分に行え、且つ、試料ガスが得られることと、気液平衡状態になるまでに要する時間を考慮すると共に、試料液は試料処理容器10の40〜60%に充填すること等を考慮して選定する。
【0009】
そして、この試料処理容器10は、水を媒体の恒温槽11に入れられ、この恒温槽11はヒータで所定温に保持されると共に、撹拌棒(スターラー)を介して撹拌可能になっている。尚、この撹拌操作は、早期に気液平衡状態にするので望ましいが、必ずしも必要でない。
また、ハロゲン化炭化水素の分析における気液平衡温度は、30〜70℃で、望ましくは35〜60℃であり、試料処理容器10内の試料液量及び昇温時間等を考慮してヒータ前記容量を選定する。即ち、この気液平衡温度を30℃以下にすると、気液平衡状態になるまでに多くの時間を要する一方、70℃以上では水蒸気の発生が多くなり分析精度の低下を招来するし、後記の送気管15内において、水蒸気が結露してハロゲン化炭化水素を吸収して分析精度の低下となる。
そのため、気液平衡温度を35〜60℃に設定すると、各成分の蒸気圧(分圧)が高くなり、ハロゲン化炭化水素の分析感度の向上となって、2ppbの微量まで測定可能となる。
【0010】
又、前記気液平衡状態に到るまでの所要時間は、8〜30分でよく、12〜25分が望ましい。この所要時間を短時間(例えば8分以下)で行うと、気液平衡状態にならない状態での分析となって、分析精度の低下となるし、30分以上となると、気液平衡状態は変わらず、時間の浪費であると共に、分解する物質が生ずる。
【0011】
又、試料処理容器10内の試料液の全量を抜くために、液抜き管13が底部近くに挿入してあり、液抜電磁弁Dを介してアスピレータ(図示略)等で排出可能になっている。
一方、試料処理容器10の上部には、試料ガスを送気する送気管15が施設してあり、その途中には、置換電磁弁(3方電磁弁)Eと切換電磁弁(6方電磁弁)Fが直列に装着してある。
そして、前記置換電磁弁Eには、置換ガス(窒素ガスや空気等)を送り込む置換管14が接続してあり、送気管15等の置換を行う。
又、前記切換電磁弁Fは、図3(A)(B)に示すように6方弁であり、(1)は送気ガス(窒素ガス等)に、(3)は送気管15に、(2)と(5)は定量管(テフロンチューブで形成の容量2ml)16に接続してあり、(4)は排気管17に、(6)は分析機器(ガスクロマトグラフ)20に接続してある。
そして、この切換電磁弁Fは、常時は、(1)と(6)、(2)と(3)、(4)と(5)が導通の排気側であり、試料ガスを採取するときには、(1)と(2)、(3)と(4)、(5)と(6)を導通の採取側にして行われる。
ガスクロマトグラフ20はよく知られた分析計であり、分析結果はデータ処理機21を介して分析結果を出力する。
【0012】
次に、制御部の制御装置25は、前記構成の分析装置の各機器を制御し、この自動分析の制御過程について、図2(A)(B)を参照して説明する。尚、各工程は、電磁弁等の操作終了によったり、タイマー(制御装置内蔵)によるタイムアップによって制御する。
【0013】
(1)試料液のサンプリング工程
ドレン電磁弁Aと試料液電磁弁Bを閉にし、試料液ポンプ1を起動すると、試料液は入口管1a、サンプル保管槽2、循環排出管3を介して循環し、サンプル保管槽2には新たな試料液が貯留される。
【0014】
(2)試料処理容器の前処理工程
この処理において、試料処理容器10は、置換ガスが送気管15に送気可能側に置換電磁弁Eを切換えてある(後記の(7)で処理済)と共に、試料液電磁弁Bが閉状態で、閉鎖状態であり、撹拌棒(スターラー)を停止する。
そして、液抜電磁弁Dを開にした後に、アスピレータ等を介して試料処理容器10内の試料液を抜いた後に、試料液電磁弁Bを開にして、サンプル保管槽2から試料液をフィルタ5を介して、試料処理容器の80〜100%になるまで充填する。そして、再度、液抜電磁弁Dを開にした後に、アスピレータ等を介して、試料処理容器10内の試料液を抜くと、試料処理容器10内は新たな試料液で洗浄されて空になる。そのため、前回の試料液と交ざることなく、新たな試料液の受入れができる。
【0015】
(3)試料液の供給工程
次に、前記(2)の工程で、試料液で洗浄された試料処理容器10に、試料液を供給するために試料液電磁弁Bを開にすると、サンプル保管槽2の試料液はフィルタ5を介して試料処理容器10に供給される。そして、試料処理容器の40〜60%なったとき、試料液電磁弁Bを閉にして供給を停止する。
【0016】
(4)試料液の処理工程
そして、試料処理容器10内の試料液を撹拌棒等で撹拌すると共に、恒温槽11を介して試料処理容器10が気液平衡温度まで昇温すると共に維持する。尚、この気液平衡温度は50℃で、所要時間は約20分で行う。
【0017】
(5)試料ガスの送気工程
試料処理容器10のガス槽の試料ガスをガスクロマトグラフ20に送気するために、試料処理容器10内に媒体(試料液、水道水、洗浄水等)を注水することによって、ガス槽の試料ガスの排出ができる。
そこで、先ず、切換電磁弁Fを排気側(図3(A))を維持する一方、置換電磁弁Eは、置換ガスが送気管15に送気不可側に切り換えて、置換ガスの送気管15への送気を停止する。
【0018】
(イ)そして、試料液電磁弁Bを開にして、試料液を試料処理容器10に供給すると、試料ガスは送気管15から切換電磁弁Fの(3)に入り、(2)(5)の定量管16を経て(4)の排気管17から排気される。この処置によって、前記経路は試料ガスによって置換される。
一方、送気ガス(窒素ガス)は切換電磁弁Fの(1)から入り、(6)から分析機器20に流入し、この経路は窒素ガスで置換される。
【0019】
その後、切換電磁弁Fを採取側(図3(B))に切り換えると、送気ガスは切換電磁弁Fの(1)から入り、(2)(5)の定量管16を経て、(6)から分析機器20に流入し、前記定量管16内の試料ガスは分析機器20に送り込まれて定量のサンプル採取が可能である。
一方、試料ガスは送気管15から切換電磁弁Fの(3)に入り、(4)の排気管17から排気される。
【0020】
(ロ)又、他の方法について説明すると、水道水電磁弁Gを開にして、水道水を水道水管18を介して試料処理容器10に送る。これによって、試料処理容器10内の試料ガスは、送気管15に送られるので、前記(イ)と同様の操作によって、試料ガスをガスクロマトグラフ20に送気可能になる。
【0021】
(ハ)又、後記で詳述するフィルタ5等の洗浄をする「洗浄水」を使用するときには、フィルタ5の下流に電磁弁(図示略)を設置して、洗浄水がフィルタ5側に流れないようにする。そして、洗浄水電磁弁Cを開にして、洗浄水を試料処理容器10に送ることによって、試料処理容器10内の試料ガスは、送気管15に送られ、前記(イ)と同様の操作によって、試料ガスをガスクロマトグラフ20に送気可能になる。
尚、この洗浄水の使用は、フィルタ5等の洗浄のために設置の施設(洗浄水配管6、洗浄水電磁弁C)を使用することができるので、設備の簡素化を図ることができる。
【0022】
以上のように、試料処理容器10内に試料液等を供給することによって、簡便に、試料ガスは送気管15に送られ、送気管15内の置換を行った後に、ガスクロマトグラフ20に送気するので、ガスクロマトグラフ20には試料ガスのみが送られる。
【0023】
(6)分析工程
ガスクロマトフラフ20に送られた試料ガスは分析されて、分析結果はデータ処理機21を介して分析結果を出力する。
【0024】
(7)送気管15の乾燥工程
この工程は、特に、試料ガスにハロゲン化炭化水素を含む場合に備えるものであり、前記(5)の試料ガスの送気工程が終了した後には、置換ガスが送気管15に送気可能側に置換電磁弁Eを切換えると共に、切換電磁弁Fを排気側(図3(A))に切り換えて、排気管17を介して排出可能にする。
置換ガスは、送気管15、定量管16内の試料ガスの放出を行い、それらの経路内の水分除去を行うと共に乾燥させる。そのため、水分による試料ガスの吸収が防止でき、正確な分析が可能となる。
尚、この工程は、ハロゲン化炭化水素以外の物質の場合には、必ずしも必要でない。
【0025】
(8)フィルタ5の洗浄工程
プロセス排水等の試料液に含有のゴミ等は、フィルタ5で除去されるので、フィルタ5の洗浄を要すると共に、サンプル保管槽2の底部に溜る汚物等を除去する必要がある。
そこで、これらフィルタ5、サンプル保管槽2の洗浄を行うには、前記(5)の試料ガスの送気に使用する媒体によって、下記の時に行うが、毎回行う必要はない。
【0026】
(イ)媒体に「試料液」を使用するときには、この試料液は、試料処理容器10内のガスを送気管15からガスクロマトフラフ20に送気するのに使用するために、この処理の終了後において実施する(図2(A))。
そして、試料液ポンプ1を停止すると共に試料液電磁弁Bを閉にし、ドレン電磁弁Aを開にして、サンプル保管槽2内の試料液を抜きながら、洗浄水電磁弁Cを開にする。そして、洗浄水を洗浄管6から流すと、洗浄水はフィルタ5からサンプル保管槽2に流れ込み、フィルタ5とサンプル保管槽2を洗浄した後、ドレン電磁弁Aを介して排出管4から排出される。
【0027】
(ロ)一方、媒体に「水道水」を使用する場合には、試料液が試料液電磁弁Bを開にしてサンプル保管槽2から試料処理容器10に供給された後、即ち、前記「(3)試料液の供給」の終了以降に行うことができるので(図2(B))、前記(イ)の時期に実施してもよい。
この処理は、前記(イ)と同様に、試料液ポンプ1を停止、試料液電磁弁Bを閉、ドレン電磁弁Aを開、洗浄水電磁弁Cを開にした後に、洗浄水を洗浄管6から流すと、フィルタ5とサンプル保管槽2が共に洗浄される。
【0028】
この様に、フィルタ5、サンプル保管槽2の洗浄を同時に自動的に行うことによって、連続自動分析を可能にする。
尚、前記(イ)又は(ロ)のフィルタ等の洗浄が終了したときには、前記「(1)試料のサンプリング」工程に戻る。
【0029】
以上のように、制御装置25を介して、(1)試料液のサンプリング工程、(2)試料処理容器の前処理工程、(3)試料液の供給工程、(4)試料液の処理工程、(5)試料ガスの送気工程、(6)分析工程、(7)送気管の乾燥工程、(8)フィルタの洗浄工程の一連の操作を実施することによって、人手を介さずに、且つ、短時間で連続自動分析をすることができる。
尚、前記自動排水分析装置は、ハロゲン化炭化水素の沸点が−20〜200℃の物質に適用する例を示したが、気液平衡による分析を用いる他の物質に適用できることはいうまでもないし、高沸点物における気液平衡温度を下げるために、試料処理容器10に凝縮器と真空ポンプを介して、減圧化で気液平衡状態にして、試料ガスを採取する構成であってもよい。
【0030】
【発明の効果】
請求項1の自動排水分析装置は、制御装置を介して、サンプリング工程から順次、試料液の供給工程、処理工程、送気工程、分析工程の処理をする自動化を図るものであり、時間的、労力面において経済性に富むと共に、ハロゲン化炭化水素の気液平衡温度を35゜C〜60゜Cに設定することによって、各成分の蒸気圧が高くなり、分析感度が向上する。
又、請求項2の自動排水分析装置は、サンプル保管槽と試料処理容器の間にフィルタが設けてあり、このフィルタは洗浄水を介して洗浄可能であるので、異物を含まない試料液での分析が可能であると共に、連続自動分析を可能にする。
請求項3の自動排水分析装置は、試料処理容器に媒体を注水して、平衡状態の試料ガスを分析機器に送ることによって、測定ガス濃度を維持できて測定感度の低下招来を防止できる。
【図面の簡単な説明】
【図1】自動排水装置の全体図である。
【図2】(A)(B)は、制御工程を示す図である。
【図3】(A)(B)は切換電磁弁Fの導通状態の概念を示す図である。
【符号の説明】
1 試料液ポンプ
2 サンプル保管槽
3 循環排出管
5 フィルタ
10 試料処理容器
15 送気管
16 定量管
17 排気管
20 分析機器(ガスクロマトグラフ)
25 制御装置
A ドレン電磁弁
B 試料液電磁弁
C 洗浄水電磁弁
D 液抜電磁弁
E 置換電磁弁(3方電磁弁)
F 切換電磁弁(6方電磁弁)
G 水道水電磁弁
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for analyzing wastewater, and more particularly to an apparatus for automatically analyzing halogenated hydrocarbons contained in process wastewater, groundwater, well water and the like.
[0002]
[Prior art]
Conventionally, halogenated hydrocarbons (dichloromethane, trichlorethylene, tetrachloroethylene, etc.) contained in process wastewater, etc., have a headspace gas chromatographic method according to JISK0125. This method is a method of analyzing a gas part with a gas chromatograph after the collected sample solution is brought into a vapor-liquid equilibrium state at 25 ° C. with a vial.
The bubbling method in which air or nitrogen is blown into a sample solution is a method in which the contained halogenated hydrocarbon is driven out with the air and the gas is analyzed.
There is also a method of measuring a fluorescent condensate produced by reacting a reagent with a halogenated hydrocarbon.
[0003]
[Problems to be solved by the invention]
In any of the above analysis methods, work such as collecting a sample solution or raising the temperature to a vapor-liquid equilibrium state is performed manually.
The headspace gas chromatographic method takes about 30 minutes or more to reach a gas-liquid equilibrium state, and it takes about 2 hours from the sampling to the end of analysis.
In the bubbling method, since air or nitrogen gas is blown into the sample solution, the halogenated hydrocarbon concentration is diluted, and an accurate concentration analysis cannot be obtained.
In the method of measuring the fluorescent condensate, the reactable substance is limited to the halogenated hydrocarbon in order to react with the reagent, and is not suitable for the measurement of other substances.
As described above, any of the conventional analysis methods is difficult to analyze accurately in a short time.
Therefore, the present invention provides an automatic drainage analyzer that solves such a problem.
[0004]
[Means for Solving the Problems]
The automatic drainage analyzer according to claim 1 is intended to automate the processing of the sample liquid supply process, the sample liquid processing process, the sample gas supply process, and the analysis process sequentially from the sampling process via the control device. It is economical in terms of time and labor. Also, it analyzes halogenated hydrocarbons in the sample solution. By setting this vapor-liquid equilibrium temperature to 35 ° C to 60 ° C, the vapor pressure of each component is increased and the analysis sensitivity is improved. .
Further, the automatic drainage analyzer according to claim 2 is the automatic drainage analyzer according to claim 1, wherein a filter is provided between the sample storage tank and the sample processing container, and the filter is configured to be washable through the wash water. As a result, the sample liquid that has passed through the washed filter can be analyzed.
[0005]
The automatic waste water analyzer according to claim 3 performs the analysis by injecting a medium into the sample processing container and sending the sample gas in an equilibrium state to the analytical instrument in the automatic waste water analyzer according to claim 1 or claim 2.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall view of an automatic waste water analyzer for halogenated hydrocarbons (dichloromethane, trichlorethylene, tetrachloroethylene, etc.) contained in process waste water and the like, and comprises a sampling part, a sample liquid processing part, an analysis part, and a control part.
First, the sampling unit will be described. The sample storage tank 2 stores a sample liquid, and is a cylindrical body having a shape in which no residual liquid remains when the bottom 2a is discharged in a spire shape.
In addition, an inlet pipe 1 a for feeding the sample liquid from the process wastewater or the like to the sample storage tank 2 via the sample liquid pump 1 or the like is connected to the upper part of the sample storage tank 2.
[0007]
An inverted U-shaped circulation discharge pipe 3 is installed at the bottom of the sample storage tank 2, and the top 3 a serves as the liquid level of the sample storage tank. A drain pipe 4 is provided at the bottom of the sample storage tank 2 via a drain solenoid valve A.
Note that a large amount of sample liquid is constantly flowing into the sample storage tank 2 and overflowed from the circulation discharge pipe 3, and the residence time of the sample storage tank 2 is shortened, so that the sample liquid can be replaced quickly, A new sample solution can always be supplied to the processing container 10.
In addition, a filter 5 for removing foreign matter is attached at a position almost at the center of the liquid level in the sample storage tank 2 and can be supplied to the sample processing container 10 via the sample liquid electromagnetic valve B with a head difference. A supply pipe 7 is provided.
A cleaning pipe 6 is connected to the downstream side of the filter 5 (upstream side of the sample solution solenoid valve B) via a cleaning water solenoid valve C, and the filter 5 can be cleaned with this cleaning solution. To do.
Further, a water pipe 18 used for supplying sample gas, which is not necessarily required, is connected to the supply pipe 7 on the downstream side of the filter 5 via a tap water solenoid valve G.
[0008]
Next, the configuration of the sample solution processing unit will be described. The sample processing container 10 has a capacity of 50 to 2000 ml, and can sufficiently replace the air supply tube 15 reaching an analytical instrument (gas chromatograph) 20 described later. The sample liquid is selected in consideration of obtaining the sample gas and the time required to reach the gas-liquid equilibrium state, and taking into account that the sample liquid is filled in 40 to 60% of the sample processing vessel 10.
[0009]
And this sample processing container 10 puts water in the thermostat 11 of a medium, and while this thermostat 11 is hold | maintained at predetermined temperature with a heater, it can be stirred via a stirring rod (stirrer). This agitation operation is desirable because it will bring the gas-liquid equilibrium to an early stage, but it is not always necessary.
Further, the vapor-liquid equilibrium temperature in the analysis of the halogenated hydrocarbon is 30 to 70 ° C., preferably 35 to 60 ° C. Considering the amount of the sample solution in the sample processing vessel 10 and the temperature rising time, the heater Select the capacity. That is, if this vapor-liquid equilibrium temperature is set to 30 ° C. or lower, it takes a long time to reach a vapor-liquid equilibrium state, while if it is 70 ° C. or higher, water vapor is generated and analysis accuracy is lowered. In the air pipe 15, water vapor is condensed to absorb the halogenated hydrocarbon, resulting in a decrease in analysis accuracy.
Therefore, when the vapor-liquid equilibrium temperature is set to 35 to 60 ° C., the vapor pressure (partial pressure) of each component is increased, the analysis sensitivity of the halogenated hydrocarbon is improved, and it is possible to measure to a minute amount of 2 ppb.
[0010]
The time required to reach the gas-liquid equilibrium state may be 8 to 30 minutes, and preferably 12 to 25 minutes. If the required time is short (for example, 8 minutes or less), the analysis will be performed in a state where the gas-liquid equilibrium state is not reached, and the analysis accuracy will be lowered. If the time is longer than 30 minutes, the gas-liquid equilibrium state will change. In other words, time is wasted and a substance that decomposes is generated.
[0011]
Further, in order to remove the entire amount of the sample liquid in the sample processing container 10, a liquid draining tube 13 is inserted near the bottom and can be discharged by an aspirator (not shown) or the like via the liquid draining electromagnetic valve D. Yes.
On the other hand, an air supply pipe 15 for supplying a sample gas is provided in the upper part of the sample processing container 10, and a replacement electromagnetic valve (3-way electromagnetic valve) E and a switching electromagnetic valve (6-way electromagnetic valve) are provided in the middle thereof. ) F is installed in series.
The replacement solenoid valve E is connected to a replacement pipe 14 for sending a replacement gas (nitrogen gas, air, etc.), and the air supply pipe 15 and the like are replaced.
The switching solenoid valve F is a six-way valve as shown in FIGS. 3A and 3B. (1) is for an air supply gas (nitrogen gas, etc.), (3) is for an air supply pipe 15. (2) and (5) are connected to a metering tube (capacity 2 ml formed with a Teflon tube) 16, (4) is connected to an exhaust pipe 17, and (6) is connected to an analytical instrument (gas chromatograph) 20. is there.
The switching solenoid valve F is normally connected to the exhaust side where (1) and (6), (2) and (3), and (4) and (5) are connected. This is performed with (1) and (2), (3) and (4), and (5) and (6) on the collecting side.
The gas chromatograph 20 is a well-known analyzer, and the analysis result is output as an analysis result via the data processor 21.
[0012]
Next, the control device 25 of the control unit controls each device of the analyzer having the above-described configuration, and the control process of this automatic analysis will be described with reference to FIGS. 2 (A) and 2 (B). Each process is controlled by the end of the operation of the solenoid valve or the like, or by time-up by a timer (built-in control device).
[0013]
(1) Sample liquid sampling step When the drain electromagnetic valve A and the sample liquid electromagnetic valve B are closed and the sample liquid pump 1 is started, the sample liquid circulates through the inlet pipe 1a, the sample storage tank 2, and the circulation discharge pipe 3. In the sample storage tank 2, a new sample solution is stored.
[0014]
(2) Sample Processing Container Pretreatment Step In this processing, the sample processing container 10 has the replacement solenoid valve E switched to the side where the replacement gas can be supplied to the air supply pipe 15 (processed in (7) described later). At the same time, the sample solution solenoid valve B is in the closed state, in the closed state, and the stirring rod (stirrer) is stopped.
Then, after opening the liquid draining electromagnetic valve D, the sample liquid in the sample processing container 10 is drawn through an aspirator or the like, and then the sample liquid electromagnetic valve B is opened to filter the sample liquid from the sample storage tank 2. 5 to 80 to 100% of the sample processing container. Then, after opening the liquid draining electromagnetic valve D again, if the sample liquid in the sample processing container 10 is extracted via an aspirator or the like, the sample processing container 10 is cleaned with a new sample liquid and emptied. . Therefore, a new sample solution can be received without intersecting with the previous sample solution.
[0015]
(3) Sample solution supply step Next, when the sample solution solenoid valve B is opened to supply the sample solution to the sample processing container 10 cleaned with the sample solution in the step (2), the sample storage is performed. The sample solution in the tank 2 is supplied to the sample processing container 10 through the filter 5. When 40 to 60% of the sample processing container is reached, the sample solution electromagnetic valve B is closed and the supply is stopped.
[0016]
(4) Sample liquid processing step The sample liquid in the sample processing container 10 is stirred with a stirring rod or the like, and the temperature of the sample processing container 10 is raised to the gas-liquid equilibrium temperature via the thermostatic chamber 11 and maintained. The vapor-liquid equilibrium temperature is 50 ° C., and the required time is about 20 minutes.
[0017]
(5) Sample gas supply process In order to supply the sample gas in the gas tank of the sample processing container 10 to the gas chromatograph 20, a medium (sample solution, tap water, washing water, etc.) is injected into the sample processing container 10. By doing so, the sample gas in the gas tank can be discharged.
Therefore, first, while the switching solenoid valve F is maintained on the exhaust side (FIG. 3A), the replacement solenoid valve E switches the replacement gas to the air supply pipe 15 to the non-air supply side, and the replacement gas supply pipe 15 Stop air supply to
[0018]
(A) When the sample solution solenoid valve B is opened and the sample solution is supplied to the sample processing container 10, the sample gas enters the switching solenoid valve F (3) from the air supply pipe 15, and (2) (5) Then, the gas is exhausted from the exhaust pipe 17 of (4) through the metering pipe 16. By this treatment, the path is replaced by the sample gas.
On the other hand, the insufflation gas (nitrogen gas) enters from (1) of the switching electromagnetic valve F and flows from (6) into the analytical instrument 20, and this path is replaced with nitrogen gas.
[0019]
Thereafter, when the switching solenoid valve F is switched to the sampling side (FIG. 3B), the air supply gas enters from (1) of the switching solenoid valve F, and passes through the metering tube 16 of (2) and (5) (6 ) Flows into the analytical instrument 20 and the sample gas in the quantification tube 16 is sent to the analytical instrument 20 to allow quantitative sampling.
On the other hand, the sample gas enters (3) of the switching solenoid valve F from the air supply pipe 15 and is exhausted from the exhaust pipe 17 of (4).
[0020]
(B) Further, another method will be described. The tap water electromagnetic valve G is opened and tap water is sent to the sample processing container 10 through the tap water pipe 18. As a result, the sample gas in the sample processing container 10 is sent to the air supply tube 15, so that the sample gas can be supplied to the gas chromatograph 20 by the same operation as the above (a).
[0021]
(C) When using “washing water” for washing the filter 5 and the like described in detail later, an electromagnetic valve (not shown) is installed downstream of the filter 5 so that the washing water flows to the filter 5 side. Do not. Then, the cleaning water electromagnetic valve C is opened and the cleaning water is sent to the sample processing container 10, whereby the sample gas in the sample processing container 10 is sent to the air supply pipe 15, and the same operation as in (a) above is performed. The sample gas can be supplied to the gas chromatograph 20.
In addition, since the installation facilities (washing water piping 6 and the washing water electromagnetic valve C) can be used for washing | cleaning of the filter 5 etc., use of this washing water can aim at simplification of an installation.
[0022]
As described above, by supplying the sample solution or the like into the sample processing container 10, the sample gas is simply sent to the air supply tube 15, and after replacing the air supply tube 15, the gas is supplied to the gas chromatograph 20. Therefore, only the sample gas is sent to the gas chromatograph 20.
[0023]
(6) Analysis Step The sample gas sent to the gas chromatograph 20 is analyzed, and the analysis result is output as the analysis result via the data processor 21.
[0024]
(7) Drying process of the air supply tube 15 This process is provided especially when the sample gas contains a halogenated hydrocarbon. After the gas gas supply process of the above (5) is completed, the replacement gas is used. Switches the replacement solenoid valve E to the air feedable side to the air feed pipe 15 and switches the switching solenoid valve F to the exhaust side (FIG. 3A) so that it can be discharged through the exhaust pipe 17.
The replacement gas discharges the sample gas in the air supply tube 15 and the metering tube 16, removes the water in those paths, and is dried. Therefore, absorption of the sample gas by moisture can be prevented, and accurate analysis can be performed.
This step is not always necessary for substances other than halogenated hydrocarbons.
[0025]
(8) Cleaning process of the filter 5 Since dust etc. contained in the sample liquid such as process waste water are removed by the filter 5, the filter 5 needs to be cleaned and the filth collected at the bottom of the sample storage tank 2 is removed. There is a need.
Therefore, the cleaning of the filter 5 and the sample storage tank 2 is performed at the following time depending on the medium used for supplying the sample gas (5), but it is not necessary to perform the cleaning every time.
[0026]
(A) When “sample liquid” is used as the medium, this sample liquid is used to feed the gas in the sample processing container 10 from the gas feed tube 15 to the gas chromatograph fluff 20, so that the processing ends. This will be performed later (FIG. 2A).
Then, the sample liquid pump 1 is stopped, the sample liquid electromagnetic valve B is closed, the drain electromagnetic valve A is opened, and the washing water electromagnetic valve C is opened while the sample liquid in the sample storage tank 2 is being drained. Then, when washing water flows from the washing pipe 6, the washing water flows from the filter 5 into the sample storage tank 2, and after washing the filter 5 and the sample storage tank 2, the washing water is discharged from the discharge pipe 4 through the drain solenoid valve A. The
[0027]
(B) On the other hand, when “tap water” is used as the medium, the sample liquid is opened after the sample liquid electromagnetic valve B is opened and supplied from the sample storage tank 2 to the sample processing container 10, that is, “(( Since it can be performed after the completion of “3) Supply of sample solution” (FIG. 2B), it may be performed at the time of (a).
In this process, the sample liquid pump 1 is stopped, the sample liquid electromagnetic valve B is closed, the drain electromagnetic valve A is opened, the washing water electromagnetic valve C is opened, and the washing water is washed in the same manner as in the above (a). When flowing from 6, the filter 5 and the sample storage tank 2 are washed together.
[0028]
As described above, the filter 5 and the sample storage tank 2 are automatically and simultaneously washed to enable continuous automatic analysis.
When the cleaning of the filter (A) or (B) is completed, the process returns to the “(1) Sample sampling” step.
[0029]
As described above, via the control device 25, (1) a sample solution sampling step, (2) a sample processing container pretreatment step, (3) a sample solution supply step, (4) a sample solution treatment step, By performing a series of operations of (5) sample gas supply process, (6) analysis process, (7) air supply tube drying process, and (8) filter cleaning process, without manual intervention, and Continuous automatic analysis can be performed in a short time.
In addition, although the said automatic waste water analyzer showed the example applied to the substance whose boiling point of halogenated hydrocarbon is -20-200 degreeC, it cannot be overemphasized that it can apply to other substances using the analysis by a gas-liquid equilibrium. In order to lower the vapor-liquid equilibrium temperature of the high-boiling product, the sample gas may be collected in a gas-liquid equilibrium state by reducing the pressure in the sample processing container 10 via a condenser and a vacuum pump.
[0030]
【The invention's effect】
The automatic drainage analyzer according to claim 1 is intended to automate the processing of the sample liquid supply process, the processing process, the air supply process, and the analysis process sequentially from the sampling process via the control device. In addition to being economical in terms of labor, by setting the vapor-liquid equilibrium temperature of the halogenated hydrocarbon to 35 ° C. to 60 ° C., the vapor pressure of each component is increased and the analytical sensitivity is improved.
The automatic drainage analyzer according to claim 2 is provided with a filter between the sample storage tank and the sample processing container, and this filter can be cleaned through cleaning water. Analysis is possible and continuous automatic analysis is possible.
The automatic drainage analyzer according to claim 3 can maintain the measurement gas concentration by injecting the medium into the sample processing container and sending the sample gas in an equilibrium state to the analytical instrument, and can prevent the measurement sensitivity from being lowered.
[Brief description of the drawings]
FIG. 1 is an overall view of an automatic drainage device.
FIGS. 2A and 2B are diagrams illustrating a control process. FIGS.
FIGS. 3A and 3B are diagrams showing a concept of a conduction state of a switching electromagnetic valve F. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sample liquid pump 2 Sample storage tank 3 Circulation discharge pipe 5 Filter 10 Sample processing container 15 Air supply pipe 16 Metering pipe 17 Exhaust pipe 20 Analytical instrument (gas chromatograph)
25 Control device A Drain solenoid valve B Sample liquid solenoid valve C Washing water solenoid valve D Liquid drain solenoid valve E Replacement solenoid valve (3-way solenoid valve)
F Switching solenoid valve (6-way solenoid valve)
G Tap water solenoid valve

Claims (3)

試料液をサンプル保管槽へ採取するサンプリング工程、前記サンプル保管槽から試料液を試料処理容器に供給する試料液の供給工程、試料液を気液平衡状態にする試料液の処理工程、平衡状態の試料ガスを分析機器に送る試料ガスの送気工程、分析機器で分析を行う分析工程で構成し、
前記試料液中のハロゲン化炭化水素を分析するものであり、前記気液平衡温度を35゜C〜60゜Cに設定し、
前記サンプリング工程から順次、試料液の供給工程、処理工程、送気工程、分析工程を制御装置を介して制御することを特徴とする自動排水分析装置。
Sampling process for collecting the sample liquid into the sample storage tank, sample liquid supply process for supplying the sample liquid from the sample storage tank to the sample processing container, sample liquid processing process for bringing the sample liquid into a gas-liquid equilibrium state, It consists of a sample gas supply process that sends sample gas to the analytical instrument, and an analysis process that performs analysis with the analytical instrument.
Analyzing halogenated hydrocarbons in the sample solution, setting the vapor-liquid equilibrium temperature to 35 ° C to 60 ° C,
An automatic drainage analyzer characterized by controlling a sample solution supply process, a process process, an air supply process, and an analysis process sequentially from the sampling process via a control device.
サンプル保管槽と試料処理容器の間にフィルタを設けると共に、このフィルタは洗浄水を介して洗浄可能であることを特徴とする請求項1の自動排水分析装置。2. The automatic drainage analyzer according to claim 1, wherein a filter is provided between the sample storage tank and the sample processing container, and the filter can be cleaned through cleaning water. 試料処理容器に媒体を注水して、平衡状態の試料ガスを分析機器に送ることを特徴とする請求項1又は請求項2の自動排水分析装置。The automatic waste water analyzer according to claim 1 or 2, wherein the sample processing container is filled with a medium and the sample gas in an equilibrium state is sent to the analytical instrument.
JP36775898A 1998-12-24 1998-12-24 Automatic drainage analyzer Expired - Lifetime JP3656441B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP36775898A JP3656441B2 (en) 1998-12-24 1998-12-24 Automatic drainage analyzer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP36775898A JP3656441B2 (en) 1998-12-24 1998-12-24 Automatic drainage analyzer

Publications (2)

Publication Number Publication Date
JP2000193656A JP2000193656A (en) 2000-07-14
JP3656441B2 true JP3656441B2 (en) 2005-06-08

Family

ID=18490126

Family Applications (1)

Application Number Title Priority Date Filing Date
JP36775898A Expired - Lifetime JP3656441B2 (en) 1998-12-24 1998-12-24 Automatic drainage analyzer

Country Status (1)

Country Link
JP (1) JP3656441B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3828538B1 (en) * 2018-07-25 2024-09-25 Daikin Industries, Ltd. Gas concentration prediction method
CN109459275B (en) * 2018-10-15 2021-01-05 浙江省海洋水产研究所 A kind of pollutant collector for water quality characteristics of petrochemical park
EP4202435A4 (en) * 2020-08-20 2024-09-11 Shimadzu Corporation INSPECTION DEVICE AND INSPECTION PROCEDURE

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0968485A (en) * 1995-08-30 1997-03-11 Mitsubishi Chem Corp Sample supply device in adsorption device for total organic halogen analysis
JP3539080B2 (en) * 1996-06-20 2004-06-14 株式会社島津製作所 Water quality analyzer

Also Published As

Publication number Publication date
JP2000193656A (en) 2000-07-14

Similar Documents

Publication Publication Date Title
JPH03165801A (en) Evaporating apparatus for test
AU2008216979A1 (en) Histological tissue specimen treatment
WO2006043900A1 (en) A water quality testing system
JP3656441B2 (en) Automatic drainage analyzer
JPH07113796A (en) Automatic gas gathering method and automatic gas analyzing method
JPH1090134A (en) Method and apparatus for analyzing trace volatile organic compounds in water
JP3216714B2 (en) Gas sampling device, gas analyzer and gas analysis method using the same
JP7819772B2 (en) Combustion gas absorbent generator and combustion ion chromatograph
JP2019178938A (en) Autoanalyzer and automatic analysis method
AU2008341007B2 (en) Analytical method and apparatus
JP2002168737A (en) Ventilation apparatus, ventilation mechanism mechanism, and purge and trap system
KR101641736B1 (en) Automatic measuring apparatus and method of concentration mixed acid
JP7643855B2 (en) Management system, management method, and management program
JPH08233797A (en) Continuous measurement device for carbonyl compounds in the atmosphere
JPH11169840A (en) Waste water treatment analyzing method and device therefor
KR101447821B1 (en) Apparatus for measuring quality of water
JP7469630B2 (en) Sludge Water Analyzer
JPH09304374A (en) Monitoring equipment for volatile organic compounds
JP2005147950A (en) Analytical system and analytical method for gas
JP7514501B1 (en) Water Analysis Equipment
US20100175457A1 (en) Apparatus and method for analytic analysis utilizing methanol rinsing
CN206767843U (en) A kind of liquid waste treatment system of zero-emission water quality on-line monitoring instrument device
JPH03229129A (en) Sample device for measuring water quality
JP4678250B2 (en) Sample solution dissolution treatment apparatus and dissolution treatment method
JP2001201440A (en) Method and apparatus for analyzing volatile components

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040406

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040427

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20050215

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050228

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080318

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090318

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090318

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100318

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100318

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100318

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110318

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110318

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120318

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120318

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130318

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130318

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140318

Year of fee payment: 9

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term