JP3335806B2 - Concentration measuring device - Google Patents
Concentration measuring deviceInfo
- Publication number
- JP3335806B2 JP3335806B2 JP19161895A JP19161895A JP3335806B2 JP 3335806 B2 JP3335806 B2 JP 3335806B2 JP 19161895 A JP19161895 A JP 19161895A JP 19161895 A JP19161895 A JP 19161895A JP 3335806 B2 JP3335806 B2 JP 3335806B2
- Authority
- JP
- Japan
- Prior art keywords
- concentration
- conductivity
- substance
- soluble substance
- suspended
- 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 - Fee Related
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば下水汚泥、パル
プ等の、懸濁物質および溶解性物質を含む被測定液の濃
度を測定する装置に係り、特に溶解性物質の濃度と、懸
濁物質の濃度と、懸濁物質と溶解性物質を合わせた全固
形分の濃度とをそれぞれ別個にかつ連続的に測定できる
ようにした濃度測定装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the concentration of a liquid to be measured containing a suspended substance and a soluble substance, for example, sewage sludge and pulp. The present invention relates to a concentration measuring device capable of separately and continuously measuring the concentration of a substance and the concentration of a total solid content of a suspended substance and a soluble substance.
【０００２】[0002]
【従来の技術】従来から、例えば下水汚泥、パルプ等
の、懸濁物質（ＳＳ：Ｓｕｓｐｅｎｄｅｄ Ｓｏｌｉｄ
ｓ）および溶解性物質を含む被測定液の濃度を測定する
装置としては、光学式、超音波式、マイクロ波式、乾燥
重量法式の濃度計が用いられてきている。2. Description of the Related Art Suspended solids such as sewage sludge and pulp have been conventionally used.
As an apparatus for measuring the concentration of the liquid to be measured containing s) and a soluble substance, optical, ultrasonic, microwave, and dry weight densitometers have been used.
【０００３】しかしながら、この種の濃度計では、懸濁
物質濃度、または懸濁物質と溶解性物質を合わせた全固
形分（ＴＳ：Ｔｏｔａｌ Ｓｏｌｉｄｓ）濃度のいずれ
かしか測定することができない。However, this type of densitometer can only measure either the concentration of suspended solids or the total solids (TS) concentration of suspended and soluble substances.
【０００４】例えば、まず、光学式や超音波式の濃度計
では、例えば図７にその原理図を示すように、液中に懸
濁している粒子によって入射波が散乱されるため透過波
が減衰するので、この減衰率を測定することにより懸濁
物質の濃度を測定するものである。For example, an optical or ultrasonic densitometer first attenuates a transmitted wave because incident waves are scattered by particles suspended in a liquid as shown in FIG. Therefore, the concentration of the suspended substance is measured by measuring the decay rate.
【０００５】従って、光学式や超音波式の濃度計では、
懸濁物質のみを検知することができ、液中に溶解してい
る物質を検知することはできない。なお、光学式の濃度
計の中には、懸濁粒子による散乱光量を測定して、懸濁
物質の濃度を測定する方式のものあるが、この方式のも
のでも、懸濁物質のみの検知である。Therefore, in an optical or ultrasonic densitometer,
Only suspended substances can be detected, and substances dissolved in liquid cannot be detected. Some optical densitometers measure the concentration of suspended solids by measuring the amount of light scattered by suspended particles.However, even with this method, only the suspended solids can be detected. is there.
【０００６】また、マイクロ波式の濃度計では、被測定
液の電気的定数である誘電率や導電率が、濃度によって
変化することに基づいている。この電気的定数は、懸濁
物質の量によっても、溶解性物質の量によっても変化す
るので、マイクロ波式は全固形分の濃度計である。[0006] In a microwave type densitometer, the dielectric constant and the electrical conductivity, which are the electrical constants of the liquid to be measured, change based on the concentration. Since the electric constant changes depending on both the amount of the suspended substance and the amount of the soluble substance, the microwave system is a concentration meter for the total solid content.
【０００７】従って、マイクロ波式の濃度計では、懸濁
物質のみの濃度測定を行なうことはできない。さらに、
乾燥重量法式の濃度計では、被測定液からある量だけサ
ンプルを採取して重量を測定し、その後このサンプルを
ヒータで加熱して水等の溶媒を蒸発させ、乾燥した後の
重量を測定し、乾燥前の重量で乾燥後の重量を除するこ
とにより全固形分の濃度を求めるものである。但し、こ
の乾燥した固形分中には、懸濁物質分と溶解性物質とが
析出した状態で含まれている。[0007] Therefore, a microwave type densitometer cannot measure the concentration of only a suspended substance. further,
In a dry weight method densitometer, a sample is taken from the liquid to be measured in a certain amount and the weight is measured.Then, the sample is heated by a heater to evaporate a solvent such as water, and the weight after drying is measured. The concentration of the total solid content is determined by dividing the weight after drying by the weight before drying. However, the suspended solids and the soluble substances are contained in the dried solids in a precipitated state.
【０００８】従って、乾燥重量法式の濃度計では、全固
形分の濃度計であって、懸濁物質のみの濃度測定を行な
うことはできない。ところで、懸濁物質および溶解性物
質を含む被測定液を扱うプロセス、例えば下水汚泥処理
等のプロセスにおいては、その管理指標として、懸濁物
質も全固形分も、また溶解性物質［（全固形分）−（懸
濁物質）］の濃度も、それぞれ把握した方がより良い管
理ができることから、懸濁物質も全固形分も測定したい
というニーズがある。[0008] Therefore, the concentration meter of the dry weight method is a concentration meter for the total solids, and cannot measure the concentration of only the suspended substance. By the way, in a process for treating a liquid to be measured containing a suspended substance and a soluble substance, for example, a process such as a sewage sludge treatment, as a control index, both a suspended substance and a total solid content and a soluble substance [(a total solid Min)-(suspended material)], it is better to grasp each concentration, so that there is a need to measure both suspended material and total solid content.
【０００９】しかしながら、前述したように、従来の各
方式の濃度計では、懸濁物質または全固形分の濃度のい
ずれかしか測定することができず、個別に測定したい場
合には、いわゆる手分析法、汚泥の場合であれば「下水
試験法」に定められた手分析法によって、懸濁物質と全
固形分とを個別に測定する方法しかない。しかしなが
ら、この手分析法は、操作が煩雑で熟練を要し、また連
続的に測定ができないという問題がある。However, as described above, the conventional densitometers of each type can measure only the concentration of the suspended solids or the total solid content. In the case of the method and sludge, there is only a method of individually measuring the suspended solids and the total solid content by the manual analysis method specified in the “Sewage test method”. However, this manual analysis method has problems in that the operation is complicated, requires skill, and continuous measurement cannot be performed.
【００１０】[0010]
【発明が解決しようとする課題】以上のように、従来の
濃度計においては、懸濁物質および溶解性物質を含む被
測定液の濃度測定に際して、懸濁物質または全固形分の
濃度のいずれかしか測定することができないという問題
があった。As described above, in the conventional concentration meter, when measuring the concentration of the liquid to be measured containing the suspended substance and the soluble substance, either the concentration of the suspended substance or the total solid content is measured. There was a problem that only measurement was possible.
【００１１】本発明の目的は、懸濁物質および溶解性物
質を含む被測定液の濃度測定に際して、溶解性物質濃
度、懸濁物質濃度、および全固形分濃度をそれぞれ別個
にかつ連続的に測定することが可能な濃度測定装置を提
供することにある。An object of the present invention is to separately and continuously measure the concentration of a soluble substance, the concentration of a suspended substance, and the concentration of a total solid content when measuring the concentration of a liquid to be measured containing a suspended substance and a soluble substance. It is an object of the present invention to provide a concentration measuring device capable of performing the measurement.
【００１２】[0012]
【課題を解決するための手段】上記の目的を達成するた
めに、配管内を流れる懸濁物質および溶解性物質を含む
被測定液の、溶解性物質濃度、懸濁物質濃度、および全
固形分濃度をそれぞれ測定する装置において、まず、請
求項１に対応する発明では、配管に取り付けられ、被測
定液の導電率を検出する導電率検出手段と、導電率検出
手段により検出された導電率の値を用いて、あらかじめ
求められた導電率と溶解性物質濃度との関係式に基づい
て演算を行ない溶解性物質の濃度を算出する溶解性物質
濃度演算手段と、配管に取り付けられ、被測定液の全固
形分濃度を検出する全固形分濃度検出手段と、溶解性物
質濃度演算手段により算出された溶解性物質濃度と全固
形分濃度検出手段により検出された全固形分濃度とに基
づいて、（全固形分濃度−溶解性物質濃度）なる演算を
行ない懸濁物質の濃度を算出する懸濁物質濃度演算手段
とを備えて成る。In order to achieve the above object, the concentration of a soluble substance, the concentration of a suspended substance, and the concentration of a substance to be measured containing a suspended substance and a soluble substance flowing in a pipe are measured.
In the apparatus for measuring the solid content concentration , first, in the invention corresponding to claim 1, a conductivity detecting means attached to a pipe and detecting the conductivity of the liquid to be measured , and a conductivity detected by the conductivity detecting means. using the value of ratio, the soluble substance concentration calculating means for calculating the concentration of dissolved substance performs calculation based on the relationship between soluble substance concentration determined in advance conductivity, attached to the pipe, the Measurement solution
Total solid concentration detection means for detecting form concentration, and soluble substances
Of the soluble substance calculated by the
Based on the total solids concentration detected by the
Then, the calculation of (total solid content concentration-soluble substance concentration)
Suspended substance concentration calculation means for calculating the concentration of suspended substance
And
【００１３】[0013]
【００１４】また、請求項２に対応する発明では、配管
に取り付けられ、被測定液の導電率を検出する導電率検
出手段と、導電率検出手段により検出された導電率の値
を用いて、あらかじめ求められた導電率と溶解性物質濃
度との関係式に基づいて演算を行ない溶解性物質の濃度
を算出する溶解性物質濃度演算手段と、配管に取り付け
られ、被測定液の懸濁物質濃度を検出する懸濁物質濃度
検出手段と、溶解性物質濃度演算手段により算出された
溶解性物質濃度と懸濁物質濃度検出手段により検出され
た懸濁物質濃度とに基づいて、（懸濁物質濃度＋溶解性
物質濃度）なる演算を行ない全固形分濃度を算出する全
固形分濃度演算手段とを備えて成る。In the invention corresponding to claim 2 , the piping
A conductivity detection means for detecting the conductivity of the liquid to be measured , and a relational expression between the conductivity and the concentration of the soluble substance determined in advance by using the value of the conductivity detected by the conductivity detection means. a soluble substance concentration calculating means for calculating the concentration of dissolved substance performs an operation based on, attached to the pipe
A suspended substance concentration detecting means for detecting a suspended substance concentration of the liquid to be measured , and a soluble substance concentration calculated by the soluble substance concentration calculating means and a suspended substance concentration detected by the suspended substance concentration detecting means. And a total solid concentration calculating means for calculating the total solid concentration by performing a calculation of (concentration of suspended substance + concentration of soluble substance) based on the above.
【００１５】一方、請求項３に対応する発明では、上記
請求項１または請求項２に対応する発明の濃度測定装置
において、被測定液中の懸濁物質の一部（固形分や繊維
質分）を除去するフィルタ手段を付加し、当該フィルタ
手段によるろ液の導電率を検出するようにしている。According to a third aspect of the present invention, there is provided the concentration measuring device according to the first or second aspect , wherein a part of a suspended substance (solid content or fiber content) in the liquid to be measured is provided. ) Is added to detect the conductivity of the filtrate by the filter means.
【００１６】また、請求項４に対応する発明では、上記
請求項３に対応する発明の濃度測定装置において、フィ
ルタ手段を逆洗浄して当該フィルタ手段に付着した固形
分や繊維質分を洗い流す逆洗手段を付加するようにして
いる。[0016] In the invention corresponding to claim 4 ,
In the concentration measuring apparatus of the invention corresponding to claim 3, so that by backwash the filter means serves to add backwash means to wash solids and fibrous matter adhering to the filter means.
【００１７】[0017]
【００１８】[0018]
【作用】 従って、請求項１ に対応する発明の濃度測定装
置においては、配管に取り付けられた導電率検出手段
で、被測定液の導電率を検出し、溶解性物質濃度演算手
段で、この導電率の値を用いて、あらかじめ求められた
導電率と溶解性物質濃度との関係式から演算を行ない、
溶解性物質の濃度を算出する。また、配管に取り付けら
れた全固形分濃度検出手段で、被測定液の全固形分濃度
を検出し、懸濁物質濃度演算手段で、上記により算出さ
れた溶解性物質濃度と上記により検出された全固形分濃
度とから、（全固形分濃度−溶解性物質濃度）なる演算
を行ない、懸濁物質の濃度を算出する。 [Action] Therefore, in the concentration measuring apparatus of the invention corresponding to claim 1, in conductivity detecting means attached to the pipe, to detect the conductivity of the test solution, in dissolved substance concentration calculating means, the conductive Using the value of the rate, perform an operation from the relational expression between the conductivity and the soluble substance concentration determined in advance,
Calculate the concentration of the soluble substance. Also attached to the plumbing
The total solid content concentration detection means was used to detect the total solid content concentration of the liquid to be measured, and the suspended solid concentration calculation means was used to calculate the soluble substance concentration calculated above and the total solid concentration detected above. Then, the calculation of (total solid content concentration-soluble substance concentration) is performed to calculate the concentration of the suspended substance.
【００１９】これにより、溶解性物質濃度、懸濁物質濃
度、および全固形分濃度をそれぞれ別個にかつ連続的に
測定することができる。また、請求項２に対応する発明
の濃度測定装置においては、配管に取り付けられた導電
率検出手段で、被測定液の導電率を検出し、溶解性物質
濃度演算手段で、この導電率の値を用いて、あらかじめ
求められた導電率と溶解性物質濃度との関係式から演算
を行ない、溶解性物質の濃度を算出する。また、配管に
取り付けられた懸濁物質濃度検出手段で、被測定液の懸
濁物質濃度を検出し、全固形分濃度演算手段で、上記に
より算出された溶解性物質濃度と上記により検出された
懸濁物質濃度とから、（懸濁物質濃度＋溶解性物質濃
度）なる演算を行ない、全固形分濃度を算出する。Thus, the concentration of the soluble substance, the concentration of the suspended substance, and the concentration of the total solid content can be measured separately and continuously. In the concentration measuring apparatus according to the present invention, the conductivity detecting means attached to the pipe detects the conductivity of the liquid to be measured, and the soluble substance concentration calculating means calculates the value of the conductivity. Is used to calculate the concentration of the soluble substance from the relational expression between the conductivity and the concentration of the soluble substance, which is obtained in advance. Also, in piping
The attached suspended substance concentration detecting means detects the suspended substance concentration of the liquid to be measured, and the total solid content concentration computing means computes the soluble substance concentration calculated above and the suspended substance concentration detected above. Then, the calculation of (concentration of suspended substance + concentration of soluble substance) is performed to calculate the total solid content concentration.
【００２０】これにより、溶解性物質濃度、懸濁物質濃
度、および全固形分濃度をそれぞれ別個にかつ連続的に
測定することができる。一方、請求項３に対応する発明
の濃度測定装置においては、上記溶解性物質濃度、懸濁
物質濃度、および全固形分濃度を測定する場合に、フィ
ルタ手段で、被測定液中の懸濁物質の一部（主として大
きな固形分や繊維質分）を除去して、ろ液の導電率を測
定することにより、長期間安定に導電率を測定すること
ができる。Thus, the concentration of the soluble substance, the concentration of the suspended substance, and the concentration of the total solid content can be measured separately and continuously. On the other hand, in the concentration measuring device of the invention according to claim 3 , when the concentration of the soluble substance, the concentration of the suspended substance, and the concentration of the total solid content are measured, the suspended substance in the liquid to be measured is filtered by the filter means. some are removed (large solids and fibrous matter mainly), by measuring the electrical conductivity of the filtrate can be measured for a long time stable conductivity.
【００２１】また、請求項４に対応する発明の濃度測定
装置においては、上記フィルタ手段で、被測定液中の懸
濁物質の固形分や繊維質分を除去して、ろ液の導電率を
測定する場合に、逆洗手段で、フィルタ手段を逆洗浄し
てフィルタ手段に付着した固形分や繊維質分を洗い流す
ことにより、より一層長期間安定に導電率を測定するこ
とができる。Further, in the concentration measuring apparatus of the invention corresponding to claim 4, in the filter means, to remove solids and fiber content of suspended solids to be measured solution, the conductivity of the filtrate In the case of measurement, the conductivity can be measured more stably for a long period of time by backwashing the filter means with the backwash means to wash out the solid matter and fibrous matter attached to the filter means .
【００２２】[0022]
【実施例】まず、本発明の原理について説明する。本発
明等が、下水汚泥について、その溶解性物質濃度と導電
率との関係を測定調査した結果、図１に示すように、極
めて良好な直線関係にあることがわかった。これは、下
水汚泥の場合、溶解性物質としてはＮａＣｌ等の塩類が
ほとんどであることから、水中でイオン化して導電率が
高くなるためである。また、この下水汚泥と同様に、溶
解性物質がほとんど塩類であるような被測定液であれ
ば、溶解性物質濃度と導電率とは、図１に示す場合と同
様に、極めて良好な直線関係にある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the principle of the present invention will be described. As a result of measuring and investigating the relationship between the concentration of the soluble substance and the electrical conductivity of the sewage sludge of the present invention, it was found that the sewage sludge had an extremely good linear relationship as shown in FIG. This is because, in the case of sewage sludge, most of the soluble substances are salts such as NaCl, so that the conductivity is increased by ionization in water. Also, as in the case of this sewage sludge, if the liquid to be measured is such that the soluble substance is almost a salt, the concentration of the soluble substance and the electrical conductivity have a very good linear relationship as in the case shown in FIG. It is in.
【００２３】従って、本発明では、導電率計を用いて被
測定液の導電率を検出し、この検出された導電率の値を
用いて、図１に示すような導電率と溶解性物質濃度との
関係式に基づいて演算を行なうことにより、溶解性物質
の濃度を算出することができる。Accordingly, in the present invention, the conductivity of the liquid to be measured is detected by using a conductivity meter, and the conductivity and the concentration of the soluble substance as shown in FIG. By performing the calculation based on the relational expression, the concentration of the soluble substance can be calculated.
【００２４】また、図２のブロック図に、その原理構成
の一形態を示すように、導電率計と、全固形分濃度を検
出するマイクロ波式、乾燥重量法式等の全固形分濃度計
とを組合せた装置を構成し、全固形分濃度検出値と導電
率から求めた溶解性物質濃度とから、（全固形分濃度−
溶解性物質濃度＝懸濁物質濃度）の演算を行なって懸濁
物質濃度を求め、全固形分濃度値および懸濁物質濃度値
を出力するようにする。なお、溶解性物質濃度値も出力
するようにしてもよい。As shown in the block diagram of FIG. 2, a conductivity meter and a total solid content meter such as a microwave type or a dry weight type method for detecting the total solid content concentration are shown in the block diagram of FIG. From the total solids concentration detection value and the soluble substance concentration determined from the electrical conductivity, the total solids concentration-
The calculation of the concentration of the soluble substance = the concentration of the suspended substance) is performed to determine the concentration of the suspended substance, and the total solid concentration value and the suspended substance concentration value are output. In addition, you may make it output a soluble substance concentration value.
【００２５】さらに、図３のブロック図に、その原理構
成の他の形態を示すように、導電率計と、懸濁物質濃度
を検出する光学式、超音波式等の懸濁物質濃度計とを組
合せた装置を構成し、懸濁物質濃度検出値と導電率から
求めた溶解性物質濃度とから、（懸濁物質濃度＋溶解性
物質濃度＝全固形分濃度）の演算を行なって全固形分濃
度を求め、懸濁物質濃度値および全固形分濃度値を出力
するようにする。なお、溶解性物質濃度値も出力するよ
うにしてもよい。Further, as shown in the block diagram of FIG. 3 as another embodiment of the principle configuration, a conductivity meter and an optical or ultrasonic type suspended substance concentration meter for detecting the concentration of suspended substance are provided. From the suspended solids concentration detection value and the soluble solids concentration obtained from the conductivity, calculate (suspended solids concentration + soluble solids concentration = total solids concentration) The concentration of the suspended solids and the concentration of the total solids are output. In addition, you may make it output a soluble substance concentration value.
【００２６】以下、上記のような原理に基づく本発明の
実施例について、図面を参照して詳細に説明する。 （第１の実施例）図４は、本実施例の濃度測定装置を下
水汚泥濃度測定に適用した場合の全体構成例を示すブロ
ック図である。Hereinafter, embodiments of the present invention based on the above principle will be described in detail with reference to the drawings. (First Embodiment) FIG. 4 is a block diagram showing an example of the entire configuration when the concentration measuring device of the present embodiment is applied to sewage sludge concentration measurement.
【００２７】すなわち、本実施例の濃度測定装置は、図
４に示すように、懸濁物質および溶解性物質を含む被測
定液である下水汚泥が流れる下水汚泥配管ライン１に取
り付けた導電率検出器２、および全固形分濃度検出手段
であるマイクロ波式濃度計３と、導電率計変換器４と、
溶解性物質濃度演算器６と、マイクロ波式濃度計変換器
５と、懸濁物質濃度演算器（ＳＳ濃度演算器）７とから
構成している。That is, as shown in FIG. 4, the concentration measuring apparatus of the present embodiment detects the conductivity attached to the sewage sludge piping line 1 through which the sewage sludge, which is the liquid to be measured containing a suspended substance and a soluble substance, flows. Device 2, a microwave type densitometer 3 which is a means for detecting the concentration of all solids, a conductivity meter converter 4,
It comprises a soluble substance concentration calculator 6, a microwave type densitometer converter 5, and a suspended substance concentration calculator (SS concentration calculator) 7.
【００２８】ここで、導電率検出器２は、被測定液であ
る下水汚泥の導電率を検出するものである。また、マイ
クロ波式濃度計３は、被測定液である下水汚泥の全固形
分濃度（ＴＳ濃度）を検出するものである。Here, the conductivity detector 2 detects the conductivity of the sewage sludge as the liquid to be measured. The microwave densitometer 3 detects the total solid concentration (TS concentration) of the sewage sludge as the liquid to be measured.
【００２９】一方、導電率計変換器４は、導電率検出器
２からの検出信号を導電率信号に変換して出力するもの
である。また、溶解性物質濃度演算器６は、あらかじめ
図１に示したような導電率と溶解性物質濃度との関係を
示す検量線が記憶されており、この検量線に基づいて、
導電率計変換器４からの導電率信号の値を用いて演算を
行ない、溶解性物質の濃度を算出するものである。On the other hand, the conductivity meter converter 4 converts the detection signal from the conductivity detector 2 into a conductivity signal and outputs it. In addition, the soluble substance concentration calculator 6 stores a calibration curve indicating the relationship between the conductivity and the soluble substance concentration as shown in FIG. 1 in advance, and based on the calibration curve,
The calculation is performed using the value of the conductivity signal from the conductivity meter converter 4 to calculate the concentration of the soluble substance.
【００３０】さらに、マイクロ波式濃度計変換器５は、
マイクロ波式濃度計３からの検出信号を全固形分濃度信
号（ＴＳ濃度信号）に変換して出力するものである。さ
らにまた、懸濁物質濃度演算器７は、溶解性物質濃度演
算器６により算出された溶解性物質濃度とマイクロ波式
濃度計変換器５からの全固形分濃度信号の値とに基づい
て、（全固形分濃度−溶解性物質濃度）なる演算を行な
い懸濁物質の濃度を算出し、懸濁物質濃度信号（ＳＳ濃
度信号）を出力するものである。Further, the microwave type densitometer converter 5 includes:
The detection signal from the microwave densitometer 3 is converted into a total solid concentration signal (TS concentration signal) and output. Furthermore, the suspended substance concentration calculator 7 calculates the concentration of the soluble substance based on the soluble substance concentration calculated by the soluble substance concentration calculator 6 and the value of the total solid content signal from the microwave type densitometer converter 5. The calculation of (total solid content-soluble substance concentration) is performed to calculate the concentration of the suspended substance, and a suspended substance concentration signal (SS concentration signal) is output.
【００３１】次に、以上のように構成した本実施例の濃
度測定装置の作用について説明する。図４において、導
電率検出器２で検出された信号は導電率計変換器４に送
られ、この導電率計変換器４から導電率信号として溶解
性物質濃度演算器６に入力される。溶解性物質濃度演算
器６には、あらかじめ図１に示したような導電率と溶解
性物質濃度との関係を示す検量線が記憶されており、こ
の検量線に基づいて導電率の値から溶解性物質濃度を求
め、この濃度信号が懸濁物質濃度演算器７に入力され
る。Next, the operation of the concentration measuring apparatus of the present embodiment configured as described above will be described. In FIG. 4, a signal detected by the conductivity detector 2 is sent to a conductivity meter converter 4, and is input from the conductivity meter converter 4 to a soluble substance concentration calculator 6 as a conductivity signal. A calibration curve indicating the relationship between the conductivity and the concentration of the soluble substance as shown in FIG. 1 is stored in the soluble substance concentration calculator 6 in advance, and the solubility is calculated from the value of the conductivity based on the calibration curve. The concentration signal is obtained, and this concentration signal is input to the suspended substance concentration calculator 7.
【００３２】一方、マイクロ波式濃度計検出器３で検出
された信号はマイクロ波式濃度計変換器５に送られ、こ
のマイクロ波式濃度計変換器５では全固形分濃度信号
（ＴＳ濃度信号）に変換して、外部にＴＳ濃度信号とし
て出力されると共に、懸濁物質濃度演算器７に入力され
る。On the other hand, the signal detected by the microwave type densitometer detector 3 is sent to the microwave type densitometer converter 5, where the total solid content signal (TS concentration signal) is transmitted. ) Is output to the outside as a TS concentration signal, and is also input to the suspended matter concentration calculator 7.
【００３３】さらに、懸濁物質濃度演算器７では、（全
固形分濃度−溶解性物質濃度）＝懸濁物質濃度の演算を
行ない、懸濁物質濃度信号（ＳＳ濃度信号）として外部
に出力される。Further, the suspended substance concentration calculator 7 calculates (total solid content concentration-soluble substance concentration) = suspended substance concentration and outputs it as a suspended substance concentration signal (SS concentration signal) to the outside. You.
【００３４】なお、溶解性物質濃度演算器６から、溶解
性物質濃度信号を独立に出力するようにしてもよい。上
述したように、本実施例の濃度測定装置は、懸濁物質お
よび溶解性物質を含む被測定液である下水汚泥の導電率
を検出する導電率検出器２と、被測定液である下水汚泥
の全固形分濃度（ＴＳ濃度）を検出する全固形分濃度検
出手段であるマイクロ波式濃度計３と、導電率検出器２
からの検出信号を導電率信号に変換して出力する導電率
計変換器４と、導電率と溶解性物質濃度との関係を示す
検量線が記憶し、この検量線に基づいて、導電率計変換
器４からの導電率信号の値を用いて演算を行ない、溶解
性物質の濃度を算出する溶解性物質濃度演算器６と、マ
イクロ波式濃度計３からの検出信号を全固形分濃度信号
（ＴＳ濃度信号）に変換して出力するマイクロ波式濃度
計変換器５と、溶解性物質濃度演算器６により算出され
た溶解性物質濃度とマイクロ波式濃度計変換器５からの
全固形分濃度信号の値とに基づいて、（全固形分濃度−
溶解性物質濃度）なる演算を行ない懸濁物質の濃度を算
出し、懸濁物質濃度信号（ＳＳ濃度信号）を出力する懸
濁物質濃度演算器７とから構成したものである。The soluble substance concentration calculator 6 may output a soluble substance concentration signal independently. As described above, the concentration measuring device according to the present embodiment includes the conductivity detector 2 that detects the conductivity of the sewage sludge that is the measurement target liquid including the suspended substance and the soluble substance, and the sewage sludge that is the measurement target liquid. A microwave concentration meter 3 which is a total solid concentration detecting means for detecting a total solid concentration (TS concentration), and a conductivity detector 2
A conductivity meter converter 4 for converting a detection signal from the sensor into a conductivity signal and outputting the signal, and a calibration curve indicating the relationship between the conductivity and the concentration of the soluble substance are stored. Based on the calibration curve, the conductivity meter is used. An operation is performed using the value of the conductivity signal from the converter 4 to calculate the concentration of the soluble substance, and a detection signal from the microwave type densitometer 3 is converted into a total solid concentration signal. A microwave type densitometer converter 5 which converts the signal into a (TS concentration signal) and outputs the dissolved substance concentration calculated by the soluble substance concentration calculator 6 and the total solid content from the microwave type densitometer converter 5 Based on the value of the concentration signal, (total solids concentration-
And a suspended substance concentration calculator 7 for calculating the concentration of the suspended substance by calculating the concentration of the dissolved substance and outputting a suspended substance concentration signal (SS concentration signal).
【００３５】従って、懸濁物質および溶解性物質を含む
被測定液である下水汚泥の濃度測定に際して、溶解性物
質濃度と、懸濁物質濃度（ＳＳ濃度）と、全固形分濃度
（ＴＳ濃度）とを、それぞれ別個に測定値として得、か
つ連続的に測定することが可能となる。Therefore, when measuring the concentration of the sewage sludge which is the liquid to be measured containing the suspended substance and the soluble substance, the concentration of the soluble substance, the concentration of the suspended substance (SS concentration), and the concentration of the total solid content (TS concentration) Are separately obtained as measured values, and can be measured continuously.
【００３６】これにより、前述した従来の問題点を解消
することができ、プロセスの管理を木目細く行なうこと
ができるようになり、プロセス運転の効率向上を図るこ
とができる。As a result, the above-mentioned conventional problems can be solved, the process can be managed in a fine grain, and the efficiency of the process operation can be improved.
【００３７】（第２の実施例）図５は、本実施例の濃度
測定装置を下水汚泥濃度測定に適用した場合の全体構成
例を示すブロック図である。(Second Embodiment) FIG. 5 is a block diagram showing an example of the entire configuration in the case where the concentration measuring device of the present embodiment is applied to sewage sludge concentration measurement.
【００３８】すなわち、本実施例の濃度測定装置は、図
５に示すように、懸濁物質および溶解性物質を含む被測
定液である下水汚泥が流れる下水汚泥配管ライン１１に
取り付けた導電率検出器１２、および懸濁物質濃度検出
手段である超音波式濃度計１３と、導電率計変換器１４
と、溶解性物質濃度演算器１６と、超音波式濃度計変換
器１５と、全固形分濃度演算器（ＴＳ濃度演算器）１７
とから構成している。That is, as shown in FIG. 5, the concentration measuring apparatus according to the present embodiment has a conductivity detection device attached to a sewage sludge pipe line 11 through which sewage sludge, which is a liquid to be measured containing a suspended substance and a soluble substance, flows. 12, an ultrasonic densitometer 13 as a suspended substance concentration detecting means, and a conductivity meter converter 14
, Soluble substance concentration calculator 16, ultrasonic densitometer converter 15, total solid concentration calculator (TS concentration calculator) 17
It is composed of
【００３９】ここで、導電率検出器１２は、被測定液で
ある下水汚泥の導電率を検出するものである。また、超
音波式濃度計１３は、被測定液である下水汚泥の懸濁物
質濃度（ＳＳ濃度）を検出するものである。Here, the conductivity detector 12 detects the conductivity of the sewage sludge as the liquid to be measured. The ultrasonic densitometer 13 detects the suspended solids concentration (SS concentration) of the sewage sludge as the liquid to be measured.
【００４０】一方、導電率計変換器１４は、導電率検出
器１２からの検出信号を導電率信号に変換して出力する
ものである。また、溶解性物質濃度演算器１６は、あら
かじめ図１に示したような導電率と溶解性物質濃度との
関係を示す検量線が記憶されており、この検量線に基づ
いて、導電率計変換器１４からの導電率信号の値を用い
て演算を行ない、溶解性物質の濃度を算出するものであ
る。On the other hand, the conductivity meter converter 14 converts the detection signal from the conductivity detector 12 into a conductivity signal and outputs it. Further, the soluble substance concentration calculator 16 stores a calibration curve indicating the relationship between the conductivity and the soluble substance concentration as shown in FIG. 1 in advance, and converts the conductivity with a conductivity meter based on the calibration curve. The operation is performed using the value of the conductivity signal from the vessel 14 to calculate the concentration of the soluble substance.
【００４１】さらに、超音波式濃度計変換器１５は、超
音波式濃度計１３からの検出信号を懸濁物質濃度信号
（ＳＳ濃度信号）に変換して出力するものである。さら
にまた、全固形分濃度演算器１７は、溶解性物質濃度演
算器１６により算出された溶解性物質濃度と超音波式濃
度計変換器１５からの懸濁物質濃度信号の値とに基づい
て、（懸濁物質濃度＋溶解性物質濃度）なる演算を行な
い全固形分の濃度を算出し、全固形分濃度信号（ＴＳ濃
度信号）を出力するものである。The ultrasonic densitometer converter 15 converts the detection signal from the ultrasonic densitometer 13 into a suspended substance concentration signal (SS concentration signal) and outputs the signal. Furthermore, the total solid content concentration calculator 17 is based on the soluble substance concentration calculated by the soluble substance concentration calculator 16 and the value of the suspended substance concentration signal from the ultrasonic concentration meter converter 15, The calculation of (concentration of suspended substance + concentration of soluble substance) is performed to calculate the concentration of all solids, and a total solid concentration signal (TS concentration signal) is output.
【００４２】次に、以上のように構成した本実施例の濃
度測定装置の作用について説明する。図５において、導
電率検出器１２で検出された信号は導電率計変換器１４
に送られ、この導電率計変換器１４から導電率信号とし
て溶解性物質濃度演算器１６に入力される。溶解性物質
濃度演算器１６には、あらかじめ図１に示したような導
電率と溶解性物質濃度との関係を示す検量線が記憶され
ており、この検量線に基づいて導電率の値から溶解性物
質濃度を求め、この濃度信号が全固形分濃度演算器１７
に入力される。Next, the operation of the concentration measuring apparatus of the present embodiment configured as described above will be described. In FIG. 5, a signal detected by the conductivity detector 12 is a conductivity meter converter 14.
, And is input as a conductivity signal from the conductivity meter converter 14 to the soluble substance concentration calculator 16. A calibration curve indicating the relationship between the conductivity and the concentration of the soluble substance as shown in FIG. 1 is stored in the soluble substance concentration calculator 16 in advance, and the solubility is calculated from the value of the conductivity based on the calibration curve. The concentration signal is obtained and the concentration signal is used as the total solid content concentration calculator 17.
Is input to
【００４３】一方、超音波式濃度計検出器１３で検出さ
れた信号は超音波式濃度計変換器１５に送られ、この超
音波式濃度計変換器１５では懸濁物質濃度信号（ＳＳ濃
度信号）に変換して、外部にＳＳ濃度信号として出力さ
れると共に、全固形分濃度演算器１７に入力される。On the other hand, the signal detected by the ultrasonic densitometer detector 13 is sent to an ultrasonic densitometer converter 15, and the ultrasonic densitometer converter 15 outputs a suspended substance concentration signal (SS concentration signal). ) Is output to the outside as an SS concentration signal, and is also input to the total solid concentration calculator 17.
【００４４】さらに、全固形分濃度演算器１７では、
（懸濁物質濃度＋溶解性物質濃度）＝全固形分濃度の演
算を行ない、全固形分濃度信号（ＴＳ濃度信号）として
外部に出力される。Further, in the total solid content concentration calculator 17,
(Concentration of suspended substance + concentration of soluble substance) = Calculation of total solid content concentration, which is output to the outside as a total solid content concentration signal (TS concentration signal).
【００４５】なお、溶解性物質濃度演算器１６から、溶
解性物質濃度信号を独立に出力するようにしてもよい。
上述したように、本実施例の濃度測定装置は、懸濁物質
および溶解性物質を含む被測定液である下水汚泥の導電
率を検出する導電率検出器１２と、被測定液である下水
汚泥の懸濁物質濃度（ＳＳ濃度）を検出する超音波式濃
度計１３と、導電率検出器１２からの検出信号を導電率
信号に変換して出力する導電率計変換器１４と、あらか
じめ図１に示したような導電率と溶解性物質濃度との関
係を示す検量線が記憶し、この検量線に基づいて、導電
率計変換器１４からの導電率信号の値を用いて演算を行
ない、溶解性物質の濃度を算出する溶解性物質濃度演算
器１６と、超音波式濃度計１３からの検出信号を懸濁物
質濃度信号（ＳＳ濃度信号）に変換して出力する超音波
式濃度計変換器１５と、溶解性物質濃度演算器１６によ
り算出された溶解性物質濃度と超音波式濃度計変換器１
５からの懸濁物質濃度信号の値とに基づいて、（懸濁物
質濃度＋溶解性物質濃度）なる演算を行ない全固形分の
濃度を算出し、全固形分濃度信号（ＴＳ濃度信号）を出
力する全固形分濃度演算器１７とから構成したものであ
る。The soluble substance concentration calculator 16 may output a soluble substance concentration signal independently.
As described above, the concentration measuring apparatus according to the present embodiment includes the conductivity detector 12 that detects the conductivity of the sewage sludge that is the liquid to be measured including the suspended substance and the soluble substance, and the sewage sludge that is the liquid to be measured. An ultrasonic densitometer 13 for detecting the concentration of suspended solids (SS concentration), a conductivity meter converter 14 for converting a detection signal from the conductivity detector 12 into a conductivity signal and outputting the signal, The calibration curve indicating the relationship between the conductivity and the concentration of the soluble substance as shown in (1) is stored, and based on the calibration curve, an operation is performed using the value of the conductivity signal from the conductivity meter converter 14, Ultrasonic densitometer conversion, which converts a detection signal from a soluble substance concentration calculator 16 for calculating the concentration of a soluble substance and a suspension substance concentration signal (SS concentration signal) and outputs the signal. Calculated by the analyzer 15 and the soluble substance concentration calculator 16 Substance concentration and ultrasonic densitometer transducer 1
Based on the value of the suspended substance concentration signal from No. 5, the operation of (suspended substance concentration + soluble substance concentration) is performed to calculate the total solid concentration, and the total solid concentration signal (TS concentration signal) is calculated. And a total solid content calculator 17 for outputting.
【００４６】従って、懸濁物質および溶解性物質を含む
被測定液である下水汚泥の濃度測定に際して、溶解性物
質濃度と、全固形分濃度（ＴＳ濃度）と、懸濁物質濃度
（ＳＳ濃度）とを、それぞれ別個に測定値として得、か
つ連続的に測定することが可能となる。Therefore, when measuring the concentration of the sewage sludge which is the liquid to be measured containing the suspended substance and the soluble substance, the concentration of the soluble substance, the total solid concentration (TS concentration), and the concentration of the suspended substance (SS concentration) Are separately obtained as measured values, and can be measured continuously.
【００４７】これにより、前述した従来の問題点を解消
することができ、プロセスの管理を木目細く行なうこと
ができるようになり、プロセス運転の効率向上を図るこ
とができる。As a result, the above-mentioned conventional problems can be solved, the process can be managed finely, and the efficiency of the process operation can be improved.
【００４８】（第３の実施例）図６は、本実施例の濃度
測定装置を下水汚泥濃度測定に適用した場合の全体構成
例を示すブロック図であり、図４と同一部分には同一符
号を付してその説明を省略し、ここでは異なる部分につ
いてのみ述べる。(Third Embodiment) FIG. 6 is a block diagram showing an example of the entire configuration when the concentration measuring device of the present embodiment is applied to sewage sludge concentration measurement. The description thereof is omitted, and only different parts will be described here.
【００４９】すなわち、本実施例の濃度測定装置は、図
６に示すように、前記下水汚泥配管ライン１から分岐し
て設けた配管上に、例えばメッシュやＵＦ膜等で構成さ
れるフィルタ２５を設け、このフィルタ２５を介して下
水汚泥を導電率検出器２へ導く構成としている。That is, in the concentration measuring apparatus of this embodiment, as shown in FIG. 6, a filter 25 composed of, for example, a mesh or a UF membrane is provided on a pipe branched from the sewage sludge pipe line 1. The sewage sludge is guided to the conductivity detector 2 through the filter 25.
【００５０】これにより、下水汚泥中の懸濁物質の一部
（主として大きな固形分や繊維質分）をフィルタ２５に
よって除去し、そのろ液の導電率を導電率検出器２で検
出するようにしている。Thus, a part of the suspended solids (mainly large solids and fibrous components) in the sewage sludge is removed by the filter 25, and the conductivity of the filtrate is detected by the conductivity detector 2. ing.
【００５１】一方、上記下水汚泥配管ライン１から分岐
して設けた配管上における、フィルタ２５の１次側にバ
ルブ２１を設けると共に、フィルタ２５の２次側にバル
ブ２３を設けている。On the other hand, a valve 21 is provided on a primary side of the filter 25 and a valve 23 is provided on a secondary side of the filter 25 on a pipe branched from the sewage sludge pipe line 1.
【００５２】また、上記分岐配管から分岐してドレン配
管を設け、かつこのドレン配管上にバルブ２２を設けて
いる。さらに、フィルタ２５の２次側に、水道水供給口
に通じるバルブ２４を設けている。A drain pipe is provided branching from the branch pipe, and a valve 22 is provided on the drain pipe. Further, on the secondary side of the filter 25, a valve 24 communicating with the tap water supply port is provided.
【００５３】さらにまた、上記各バルブ２１〜２４のそ
れぞれの開閉を制御する洗浄コントローラ２０を設けて
いる。これらにより、フィルタ２５を逆洗浄してフィル
タ２５に付着した固形分や繊維質分を洗い流す逆洗手段
を構成している。Further, a cleaning controller 20 for controlling the opening and closing of each of the valves 21 to 24 is provided. These constitute a backwashing means for backwashing the filter 25 to wash out solids and fibrous materials attached to the filter 25.
【００５４】次に、以上のように構成した本実施例の濃
度測定装置の作用について説明する。なお、ここでは、
前記第１の実施例の作用と異なる部分についてのみ述べ
ることにする。Next, the operation of the concentration measuring apparatus of the present embodiment configured as described above will be described. Here,
Only parts different from the operation of the first embodiment will be described.
【００５５】図６において、下水汚泥配管ライン１から
汚泥の流れの一部を分岐し、バルブ２１（常時開）を介
してフィルタ２５に導かれる。そして、このフィルタ２
５で大きな固形分や繊維質分が除去されたろ液は、バル
ブ２３（常時開）を介して導電率検出器２へ流れて行
き、ここで導電率が検出される。なお、導電率検出後の
ろ液は、ドレン配管から外部へ排出される。In FIG. 6, a part of the sludge flow branches off from the sewage sludge piping line 1 and is led to a filter 25 via a valve 21 (normally open). And this filter 2
The filtrate from which large solids and fibrous components have been removed at 5 flows to the conductivity detector 2 via the valve 23 (normally open), where the conductivity is detected. The filtrate after the detection of the conductivity is discharged from the drain pipe to the outside.
【００５６】また、フィルタ２５の１次側に設けたバル
ブ２２は、常時は閉となっている。また、フィルタ２５
の２次側に設けたバルブ２４は、常時は閉となってい
る。一方、洗浄コントローラ２０により、フィルタ２５
の洗浄時に、バルブ２１〜２４のそれぞれの開閉が制御
される。The valve 22 provided on the primary side of the filter 25 is normally closed. Also, the filter 25
The valve 24 provided on the secondary side is normally closed. On the other hand, the filter 25
During the cleaning, the opening and closing of each of the valves 21 to 24 is controlled.
【００５７】すなわち、フィルタ２５は、その長時間の
使用によって１次側が目詰まりしてきて、ろ液が十分に
得られなくなるので、定期的に、例えば４時間おき位に
フィルタ２５を水道水によって逆洗を行なうことが好ま
しい。そして、この逆洗時には、洗浄コントローラ２０
により、バルブ２１，２３を閉にし、バルブ２２を開に
し、さらにバルブ２４を開にして水道水をフィルタ２５
の２次側に導入し、その水圧によって、フィルタ２５の
１次側に付着した固形分や繊維質分を洗い流し、バルブ
２２を介してドレン配管から外部へ排出される。そし
て、この逆洗動作終了後は、バルブ２２，２４を閉に、
バルブ２１，２３を開にして、通常の測定状態に戻され
る。That is, since the primary side of the filter 25 becomes clogged due to its long use, the filtrate cannot be sufficiently obtained. Preferably, washing is performed. At the time of this back washing, the washing controller 20
, The valves 21 and 23 are closed, the valve 22 is opened, and the valve 24 is further opened to remove tap water from the filter 25.
The solid content and the fibrous material attached to the primary side of the filter 25 are washed away by the water pressure, and discharged from the drain pipe through the valve 22 to the outside. After the backwash operation is completed, the valves 22 and 24 are closed,
The valves 21 and 23 are opened to return to the normal measurement state.
【００５８】なお、逆洗中においては、導電率の値は逆
洗開始直前の値にホールドするようにしておく。上述し
たように、本実施例の濃度測定装置は、前記第１の実施
例の濃度測定装置に加えて、被測定液中である下水汚泥
の懸濁物質の一部（固形分や繊維質分）を除去するフィ
ルタ２５と、このフィルタ２５を逆洗浄してフィルタ２
５に付着した固形分や繊維質分を洗い流すバルブ２１〜
２４およびその開閉を制御する洗浄コントローラ２０か
らなる逆洗手段を設けて構成したものである。During the backwash, the value of the electric conductivity is kept at the value immediately before the start of the backwash. As described above, in addition to the concentration measuring device of the first embodiment, the concentration measuring device of the present embodiment includes a part of the suspended matter of the sewage sludge (the solid content and the fibrous ) Is removed, and the filter 25 is back-washed to remove the filter 2.
Valves 21 to wash out solid and fibrous components adhering to 5
24 and a backwashing means comprising a cleaning controller 20 for controlling the opening and closing thereof.
【００５９】従って、懸濁物質および溶解性物質を含む
被測定液である下水汚泥の濃度測定に際して、溶解性物
質濃度と、全固形分濃度（ＴＳ濃度）と、懸濁物質濃度
（ＳＳ濃度）とを、それぞれ別個に測定値として得、か
つ連続的に、しかもより一層長期間安定に測定すること
が可能となる。Therefore, when measuring the concentration of sewage sludge, which is a liquid to be measured containing a suspended substance and a soluble substance, the concentration of the soluble substance, the total solid concentration (TS concentration), and the concentration of the suspended substance (SS concentration) Are separately obtained as measured values, and can be measured continuously and more stably for a longer period of time.
【００６０】すなわち、一般的に下水汚泥の導電率を連
続的に検出しようとする場合、検出器の電極部に下水汚
泥中の大きい固形分や繊維質分が詰まってしまうことが
あり、長時間連続的に検出することが困難となることも
あることから、本実施例のように、フィルタ２５をかけ
たろ液の導電率を検出するようにして、長期間安定に導
電率を検出することが可能となる。That is, in general, when the conductivity of sewage sludge is to be continuously detected, a large solid content or a fibrous content in the sewage sludge may be clogged in the electrode portion of the detector. Since it may be difficult to continuously detect, it is possible to stably detect the conductivity for a long period of time by detecting the conductivity of the filtrate applied with the filter 25 as in this embodiment. It becomes possible.
【００６１】これにより、前述した従来の問題点を解消
することができ、プロセスの管理を木目細く行なうこと
ができるようになり、プロセス運転のより一層の効率向
上を図ることができる。As a result, the above-mentioned conventional problems can be solved, the process can be managed finely, and the efficiency of the process operation can be further improved.
【００６２】尚、本発明は、上記各実施例に限定される
ものではなく、次のようにしても同様に実施できるもの
である。 （ａ）上記第３の実施例では、被測定液中である下水汚
泥の懸濁物質の一部（固形分や繊維質分）を除去するフ
ィルタ２５と、このフィルタ２５を逆洗浄してフィルタ
２５に付着した固形分や繊維質分を洗い流すバルブ２１
〜２４およびその開閉を制御する洗浄コントローラ２０
からなる逆洗手段を、上記第１の実施例の濃度測定装置
に付加して構成した場合について説明したが、これに限
らず、当該フィルタ２５と、逆洗手段を、上記第２の実
施例の濃度測定装置に付加して構成するようにしてもよ
い。The present invention is not limited to the above embodiments, but can be implemented in the following manner. (A) In the third embodiment, the filter 25 for removing a part (solid content or fibrous content) of the suspended matter of the sewage sludge in the liquid to be measured, and the filter 25 by back washing the filter 25 Valve 21 for washing out solids and fibrous substances attached to 25
Controller 20 for controlling the opening and closing thereof and its opening and closing
The backwashing means made up of the concentration measuring apparatus of the first embodiment has been described. However, the present invention is not limited to this. The filter 25 and the backwashing means can be replaced by the second embodiment. May be added to the concentration measuring device.
【００６３】（ｂ）上記第３の実施例では、被測定液中
である下水汚泥の懸濁物質の一部（固形分や繊維質分）
を除去するフィルタ２５と、このフィルタ２５を逆洗浄
してフィルタ２５に付着した固形分や繊維質分を洗い流
すバルブ２１〜２４およびその開閉を制御する洗浄コン
トローラ２０からなる逆洗手段を、併用した場合につい
て説明したが、これに限らず、逆洗手段を省略して、フ
ィルタ２５のみを、上記第１または第２の実施例の濃度
測定装置に設けるようにしてもよい。(B) In the third embodiment, a part of the suspended matter of the sewage sludge in the liquid to be measured (solid content or fiber content)
And a backwashing means including valves 21 to 24 for backwashing the filter 25 to wash out solids and fibrous matter adhering to the filter 25 and a washing controller 20 for controlling the opening and closing thereof. Although the case has been described, the present invention is not limited to this, and the backwash means may be omitted and only the filter 25 may be provided in the concentration measuring apparatus of the first or second embodiment.
【００６４】[0064]
【発明の効果】以上説明したように本発明によれば、懸
濁物質および溶解性物質を含む被測定液の濃度測定に際
して、溶解性物質濃度、懸濁物質濃度、および全固形分
濃度をそれぞれ別個にかつ連続的に測定することが可能
な濃度測定装置が提供できる。 According to the present invention as described above ,
When measuring the concentration of the liquid to be measured containing suspended and soluble substances
To determine the soluble, suspended, and total solids
A concentration measuring device capable of separately and continuously measuring the concentration can be provided.
【００６５】[0065]
【００６６】[0066]
【００６７】[0067]
【００６８】[0068]
【図１】本発明の基本となる溶解性物質濃度と導電率と
の関係を示す特性図。FIG. 1 is a characteristic diagram showing the relationship between the concentration of a soluble substance and the electrical conductivity, which is the basis of the present invention.
【図２】本発明による濃度測定装置の原理構成の一形態
を示すブロック図。FIG. 2 is a block diagram showing one embodiment of the principle configuration of the concentration measuring device according to the present invention.
【図３】本発明による濃度測定装置の原理構成の他の形
態を示すブロック図。FIG. 3 is a block diagram showing another embodiment of the principle configuration of the concentration measuring device according to the present invention.
【図４】本発明による濃度測定装置の第１の実施例を示
すブロック図。FIG. 4 is a block diagram showing a first embodiment of a concentration measuring device according to the present invention.
【図５】本発明による濃度測定装置の第２の実施例を示
すブロック図。FIG. 5 is a block diagram showing a second embodiment of the concentration measuring device according to the present invention.
【図６】本発明による濃度測定装置の第３の実施例を示
すブロック図。FIG. 6 is a block diagram showing a third embodiment of the concentration measuring device according to the present invention.
【図７】従来の濃度計の一例を示す原理図。FIG. 7 is a principle view showing an example of a conventional densitometer.
１…下水汚泥配管ライン、 ２…導電率検出器、 ３…マイクロ波式濃度計、 ４…導電率計変換器、 ５…マイクロ波式濃度計変換器、 ６…溶解性物質濃度演算器、 ７…ＳＳ懸濁物質濃度演算器（ＳＳ濃度演算器）、 １１…下水汚泥配管ライン、 １２…導電率検出器、 １３…超音波式濃度計検出器、 １４…導電率計変換器、 １５…超音波式濃度計変換器、 １６…溶解性物質濃度演算器、 １７…全固形分濃度濃度演算器（ＴＳ濃度演算器）、 ２０…洗浄コントローラ、 ２１，２２，２３，２４…バルブ、 ２５…フィルタ。 DESCRIPTION OF SYMBOLS 1 ... Sewage sludge piping line, 2 ... Conductivity detector, 3 ... Microwave type densitometer, 4 ... Conductivity meter converter, 5 ... Microwave type densitometer converter, 6 ... Soluble substance concentration calculator, 7 ... SS suspended substance concentration calculator (SS concentration calculator), 11 ... Sewage sludge piping line, 12 ... Conductivity detector, 13 ... Ultrasonic type concentration meter detector, 14 ... Conductivity meter converter, 15 ... Super Acoustic concentration meter converter, 16: soluble substance concentration calculator, 17: total solid concentration concentration calculator (TS concentration calculator), 20: cleaning controller, 21, 22, 23, 24: valve, 25: filter .
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−238246（ＪＰ，Ａ) 特開 昭58−210557（ＪＰ，Ａ) 特開 平３−162655（ＪＰ，Ａ) 特開 昭62−198731（ＪＰ，Ａ) 特開 昭60−259941（ＪＰ，Ａ) 特開 平３−142351（ＪＰ，Ａ) 特開 平７−103944（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 27/00 - 27/24 G01N 22/00 - 22/04 G01N 15/00 - 15/14 G01N 29/00 - 29/28 G01N 21/00 - 21/61 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-238246 (JP, A) JP-A-58-210557 (JP, A) JP-A-3-162655 (JP, A) JP-A 62-210 198731 (JP, A) JP-A-60-259941 (JP, A) JP-A-3-142351 (JP, A) JP-A-7-103944 (JP, A) (58) Fields investigated (Int. 7 , DB name) G01N 27/00-27/24 G01N 22/00-22/04 G01N 15/00-15/14 G01N 29/00-29/28 G01N 21/00-21/61
Claims (4)
質を含む被測定液の、溶解性物質濃度、懸濁物質濃度、
および全固形分濃度をそれぞれ測定する装置において、 前記配管に取り付けられ、前記被測定液の導電率を検出
する導電率検出手段と、 前記導電率検出手段により検出された導電率の値を用い
て、あらかじめ求められた導電率と溶解性物質濃度との
関係式に基づいて演算を行ない前記溶解性物質の濃度を
算出する溶解性物質濃度演算手段と、 前記配管に取り付けられ、前記被測定液の全固形分濃度
を検出する全固形分濃度検出手段と、 前記溶解性物質濃度演算手段により算出された溶解性物
質濃度と前記全固形分濃度検出手段により検出された全
固形分濃度とに基づいて、（全固形分濃度−溶解性物質
濃度）なる演算を行ない前記懸濁物質の濃度を算出する
懸濁物質濃度演算手段と、 を備えて成ることを特徴とする濃度測定装置。A concentration of a soluble substance, a concentration of a suspended substance, and a concentration of a liquid to be measured containing a suspended substance and a soluble substance flowing in a pipe.
And an apparatus for measuring the total solid concentration, respectively, using a conductivity detector attached to the pipe and detecting the conductivity of the liquid to be measured, using a value of the conductivity detected by the conductivity detector. A soluble substance concentration calculating means for performing a calculation based on a relational expression between the conductivity and the soluble substance concentration determined in advance to calculate the concentration of the soluble substance; and A total solid content concentration detecting means for detecting a total solid content concentration, based on the soluble substance concentration calculated by the soluble substance concentration calculating means and the total solid content concentration detected by the total solid content concentration detecting means; And a suspension substance concentration calculating means for performing a calculation of (total solid content concentration-soluble substance concentration) to calculate the concentration of the suspended substance.
質を含む被測定液の、溶解性物質濃度、懸濁物質濃度、
および全固形分濃度をそれぞれ測定する濃度を測定する
装置において、 前記配管に取り付けられ、前記被測定液の導電率を検出
する導電率検出手段と、 前記導電率検出手段により検出された導電率の値を用い
て、あらかじめ求められた導電率と溶解性物質濃度との
関係式に基づいて演算を行ない前記溶解性物質の濃度を
算出する溶解性物質濃度演算手段と、 前記配管に取り付けられ、前記被測定液の懸濁物質濃度
を検出する懸濁物質濃度検出手段と、 前記溶解性物質濃度演算手段により算出された溶解性物
質濃度と前記懸濁物質濃度検出手段により検出された懸
濁物質濃度とに基づいて、（懸濁物質濃度＋溶解性物質
濃度）なる演算を行ない全固形分濃度を算出する全固形
分濃度演算手段と、 を備えて成ることを特徴とする濃度測定装置。2. The concentration of a soluble substance, a concentration of a suspended substance, and a concentration of a liquid to be measured containing a suspended substance and a soluble substance flowing in a pipe.
And a device for measuring the concentration for measuring the total solid content concentration, wherein the conductivity detector is attached to the pipe and detects the conductivity of the liquid to be measured, and the conductivity detected by the conductivity detector is Using a value, a soluble substance concentration calculating means for performing a calculation based on a relational expression between the conductivity and the soluble substance concentration determined in advance to calculate the concentration of the soluble substance, attached to the pipe, A suspended substance concentration detecting means for detecting a suspended substance concentration of the liquid to be measured; a soluble substance concentration calculated by the soluble substance concentration calculating means; and a suspended substance concentration detected by the suspended substance concentration detecting means. And a total solid concentration calculating means for calculating a total solid concentration by performing an operation of (concentration of suspended substance + concentration of soluble substance) on the basis of the above.
度測定装置において、 前記被測定液中の懸濁物質の一部（固形分や繊維質分）
を除去するフィルタ手段を付加し、当該フィルタ手段に
よるろ液の導電率を検出するようにしたことを特徴とす
る濃度測定装置。3. The concentration measuring device according to claim 1, wherein a part of a suspended substance (solid content or fibrous content) in the liquid to be measured.
A concentration measuring apparatus, characterized by adding a filter means for removing the water and detecting the conductivity of the filtrate by the filter means.
いて、 前記フィルタ手段を逆洗浄して当該フィルタ手段に付着
した固形分や繊維質分を洗い流す逆洗手段を付加するよ
うにしたことを特徴とする濃度測定装置。4. The concentration measuring apparatus according to claim 3, wherein a backwashing means for backwashing the filter means to wash out solids and fibrous materials attached to the filter means is added. Characteristic concentration measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19161895A JP3335806B2 (en) | 1995-07-27 | 1995-07-27 | Concentration measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19161895A JP3335806B2 (en) | 1995-07-27 | 1995-07-27 | Concentration measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0943181A JPH0943181A (en) | 1997-02-14 |
| JP3335806B2 true JP3335806B2 (en) | 2002-10-21 |
Family
ID=16277638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19161895A Expired - Fee Related JP3335806B2 (en) | 1995-07-27 | 1995-07-27 | Concentration measuring device |
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| Country | Link |
|---|---|
| JP (1) | JP3335806B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000111499A (en) | 1998-10-02 | 2000-04-21 | Toshiba Fa Syst Eng Corp | Microwave concentration-measuring device |
| KR20030053256A (en) * | 2001-12-22 | 2003-06-28 | 재단법인 포항산업과학연구원 | Process of managing Cl ion concentration in an open circular cooling water system by using an electric conductivity meter |
| JP4516364B2 (en) * | 2004-07-07 | 2010-08-04 | 東亜ディーケーケー株式会社 | Chlorine demand measuring device, water quality management system, chlorine demand measuring method, and water quality management method |
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| JPH0943181A (en) | 1997-02-14 |
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| LAPS | Cancellation because of no payment of annual fees |