JPH0943181A - Concentration measuring device - Google Patents

Concentration measuring device

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Publication number
JPH0943181A
JPH0943181A JP19161895A JP19161895A JPH0943181A JP H0943181 A JPH0943181 A JP H0943181A JP 19161895 A JP19161895 A JP 19161895A JP 19161895 A JP19161895 A JP 19161895A JP H0943181 A JPH0943181 A JP H0943181A
Authority
JP
Japan
Prior art keywords
concentration
conductivity
soluble substance
substance
solid content
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.)
Granted
Application number
JP19161895A
Other languages
Japanese (ja)
Other versions
JP3335806B2 (en
Inventor
Seiji Yamaguchi
征治 山口
Minoru Kaihata
実 貝畑
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP19161895A priority Critical patent/JP3335806B2/en
Publication of JPH0943181A publication Critical patent/JPH0943181A/en
Application granted granted Critical
Publication of JP3335806B2 publication Critical patent/JP3335806B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To continuously and individually measure the concentration of soluble substance, that of suspension substance, and that of total solid content by using the conductivity of a liquid to be measured and by performing an operation based on the relationship between a conductivity which is obtained in advance and the concentration of the soluble substance. SOLUTION: A signal detected by a conductivity detector 2 is sent to a conductivity meter converter 4 and is inputted to a soluble substance concentration operator 6 as a conductivity signal, the concentration of the soluble substance is obtained based on a calibration curve for indicating the relationship between the conductivity which is stored in advance and the concentration of the soluble substance, and a concentration signal is outputted externally and at the same time is inputted to a suspension substance(SS) concentration operator 7. On the other hand, a signal detected by a microwave type densitometer 3 is sent to a microwave type densitometer converter 5, is converted to a total solid content (TS) concentration signal and is outputted externally, and at the same time is outputted to the operator 7. The operator 7 subtracts the concentration of the soluble substance from the TS concentration, obtains an SS concentration signal, and outputs it externally.

Description

【発明の詳細な説明】Detailed Description of the Invention

【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 suspended solids and soluble substances, such as sewage sludge and pulp, and particularly to the concentration of soluble substances and suspended solids. The present invention relates to a concentration measuring device capable of separately and continuously measuring the concentration of a substance and the concentration of the total solid content of a suspension 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 Conventionally, suspended substances (SS: Suspended Solid) such as sewage sludge and pulp are used.
As a device for measuring the concentration of the solution to be measured containing s) and a soluble substance, optical, ultrasonic, microwave, and dry weight method 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 measure either the concentration of suspended solids or the total solids (TS) concentration of the suspended solids and soluble solids.

【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, in an optical or ultrasonic densitometer, for example, as shown in the principle diagram of FIG. 7, an incident wave is scattered by particles suspended in a liquid, so that a transmitted wave is attenuated. Therefore, the concentration of the suspended substance is measured by measuring this attenuation 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 the liquid cannot be detected. Some optical densitometers measure the amount of light scattered by suspended particles to measure the concentration of suspended solids, but even with this system, only 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。
Further, the microwave type densitometer is based on the fact that the electric constants such as the dielectric constant and the electric conductivity of the liquid to be measured change depending on the concentration. Since this electric constant changes depending on the amount of suspended substances and the amount of soluble substances, the microwave type is a concentration meter of total solids.

【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。
Therefore, the microwave type densitometer cannot measure the concentration of only the suspended substance. further,
In the dry weight method concentration meter, a certain amount of a sample is taken from the liquid to be measured and weighed, and then this sample is heated with a heater to evaporate a solvent such as water, and the weight after drying is measured. The total solid content concentration is obtained by dividing the weight after drying by the weight before drying. However, in this dried solid content, a suspended matter content and a soluble material are contained 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。
Therefore, the dry gravimetric densitometer is a densitometer of total solids, and cannot measure the concentration of only the suspended substance. By the way, in the process of handling the liquid to be measured containing the suspended substance and the soluble substance, for example, the process such as the treatment of sewage sludge, the suspended substance and the total solid content, and the soluble substance [(total solid substance Since it is possible to better manage the concentration of (min)-(suspended substance), it is necessary to measure both the suspended substance and the 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, and when it is desired to individually measure the concentration, the so-called manual analysis is required. In the case of the method and sludge, there is only the method of individually measuring the suspended solids and the total solids by the manual analysis method specified in “Sewage test method”. However, this manual analysis method has a problem that the operation is complicated, skill is required, 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 densitometer, 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 it could only measure.

【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 measure the concentration of a soluble substance, the concentration of a suspended substance, and the concentration of total solids separately and continuously when measuring the concentration of a liquid to be measured containing a suspended substance and a soluble substance. An object of the present invention is to provide a concentration measuring device capable of performing the above.

【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、懸濁物質および溶解性物質を含む被測定液の濃度
を測定する装置において、まず、請求項1に対応する発
明では、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を備えて成る。
In order to achieve the above object, in an apparatus for measuring the concentration of a solution to be measured containing a suspended substance and a soluble substance, first, in the invention corresponding to claim 1, Using the conductivity detection means for detecting the conductivity of the measurement liquid and the value of the conductivity detected by the conductivity detection means, the calculation is performed based on the relational expression between the conductivity and the soluble substance concentration obtained in advance. And a soluble substance concentration calculating means for calculating the concentration of the soluble substance.

【0013】また、請求項2に対応する発明では、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、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 the invention according to claim 2, the conductivity determined in advance using the conductivity detecting means for detecting the conductivity of the liquid to be measured and the value of the conductivity detected by the conductivity detecting means. A soluble substance concentration calculating means for calculating the concentration of the soluble substance by performing an operation based on the relational expression between the rate and the soluble substance concentration, and a total solid content concentration detecting means for detecting the total solid content concentration of the liquid to be measured. , Based on the soluble substance concentration calculated by the soluble substance concentration calculation means and the total solid content concentration detected by the total solid content concentration detection means, the calculation of (total solid content concentration-soluble substance concentration) is performed. And a suspension substance concentration calculating means for calculating the concentration of the suspension substance.

【0014】さらに、請求項3に対応する発明では、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、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演算手段に
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。
Further, in the invention corresponding to claim 3, the conductivity determined in advance using the conductivity detecting means for detecting the conductivity of the liquid to be measured and the value of the conductivity detected by the conductivity detecting means. And a soluble substance concentration calculating means for calculating the concentration of the soluble substance by performing a calculation based on the relational expression between the rate and the concentration of the soluble substance, and a suspended substance concentration detecting means for detecting the concentration of the suspended substance in the liquid to be measured. , (Suspended substance concentration + soluble substance concentration) is calculated based on the soluble substance concentration calculated by the soluble substance concentration calculation means and the suspended substance concentration detected by the suspended substance concentration calculation means. And a total solid content concentration calculating means for calculating the total solid content concentration.

【0015】一方、請求項4に対応する発明では、上記
請求項1乃至請求項3のいずれか1項に対応する発明の
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。
On the other hand, in the invention corresponding to claim 4, in the concentration measuring device of the invention according to any one of claims 1 to 3, a part of the suspended solid (solid content) in the liquid to be measured is used. (Filtering or fibrous material) is added to detect the conductivity of the filtrate by the filtering means.

【0016】また、請求項5に対応する発明では、上記
請求項4に対応する発明の濃度測定装置において、フィ
ルタを逆洗浄して当該フィルタ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。
Further, in the invention according to claim 5, in the concentration measuring device of the invention according to claim 4, backwashing means for backwashing the filter to wash away solid matters and fibrous matters adhering to the filter. Is added.

【0017】[0017]

【作用】従って、まず、請求項1に対応する発明の濃度
測定装置においては、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。
Therefore, first, in the concentration measuring device of the invention according to claim 1, the conductivity detecting means 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 by performing an arithmetic operation from the relational expression between the conductivity and the concentration of the soluble substance which is obtained in advance.

【0018】これにより、溶解性物質濃度を測定するこ
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、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、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。
Thus, the concentration of the soluble substance can be measured. In the concentration measuring device of the invention corresponding to claim 2, the conductivity detecting means detects the conductivity of the liquid to be measured, and the soluble substance concentration calculating means uses this conductivity value in advance. The concentration of the soluble substance is calculated by calculating from the relational expression between the obtained conductivity and the concentration of the soluble substance. Further, the total solid content concentration detecting means detects the total solid content concentration of the liquid to be measured, and the suspended solid concentration calculating means, the soluble substance concentration calculated above and the total solid content concentration detected above. From (total solid content concentration-soluble substance concentration), the concentration of the suspended substance is calculated.

【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。さらに、請求項3に対応する発
明の濃度測定装置においては、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、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. Further, in the concentration measuring device of the invention corresponding to claim 3, the conductivity detecting means detects the conductivity of the liquid to be measured, and the soluble substance concentration calculating means uses the value of the conductivity in advance. The concentration of the soluble substance is calculated by calculating from the relational expression between the obtained conductivity and the concentration of the soluble substance. In addition, with suspended substance concentration detection means,
The concentration of suspended solids in the liquid to be measured is detected, and the total solid content concentration calculating means calculates the concentration of the soluble substances calculated above and the concentration of the suspended solids detected above (suspended substance concentration + solubility Substance concentration) 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4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(種として大
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 4, when measuring the concentration of the soluble substance, the concentration of the suspended substance, and the concentration of the total solid content, the suspended substance in the liquid to be measured is filtered by the filter means. By removing a part (large solid content or fibrous content as seeds) of the filtrate and measuring the conductivity of the filtrate, the conductivity can be stably measured for a long period of time.

【0021】また、請求項5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、フィルタを逆洗浄してフ
ィルタ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 according to claim 5, the filter means removes the solid content and the fibrous content of the suspended substance in the liquid to be measured, and the conductivity of the filtrate is adjusted. When the measurement is performed, the backwashing means backwashes the filter to wash away the solid content and the fibrous content attached to the filter, so that the conductivity can be stably measured for a longer period of time.

【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 soluble substance concentration and the conductivity of the sewage sludge, it was found that the present invention has an extremely good linear relationship as shown in FIG. This is because in the case of sewage sludge, since most of the soluble substances are salts such as NaCl, they are ionized in water to increase the conductivity. Further, similar to the sewage sludge, if the solution to be measured is such that the soluble substance is almost a salt, the soluble substance concentration and the conductivity have an extremely 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。
Therefore, in the present invention, the conductivity of the liquid to be measured is detected using a conductivity meter, and the detected conductivity value is used to determine the conductivity and the soluble substance concentration as shown in FIG. The concentration of the soluble substance can be calculated by performing the calculation based on the relational expression with.

【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。
Further, as shown in the block diagram of FIG. 2 as one form of its principle configuration, a conductivity meter and a total solid content concentration meter such as a microwave type or a dry weight method for detecting the total solid content concentration are shown. An apparatus in which the total solid content concentration detection value and the soluble substance concentration obtained from the electrical conductivity are set to (total solid content concentration-
The soluble substance concentration = suspended substance concentration) is calculated to obtain the suspended substance concentration, and the total solid content concentration value and the suspended substance concentration value are output. The soluble substance concentration value may also be output.

【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 form of the principle configuration, a conductivity meter and a suspended substance concentration meter such as an optical type or an ultrasonic type for detecting the suspended substance concentration are provided. An apparatus combining the above is configured to calculate (suspended substance concentration + soluble substance concentration = total solid content concentration) from the suspended substance concentration detected value and the soluble substance concentration obtained from the conductivity to calculate the total solid content. Determine the concentration and output the suspended solids concentration value and total solids concentration value. The soluble substance concentration value may also be output.

【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。
An embodiment of the present invention based on the above principle will be described below in detail with reference to the drawings. (First Embodiment) FIG. 4 is a block diagram showing an example of the overall configuration when the concentration measuring device of the present embodiment is applied to the measurement of sewage sludge concentration.

【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 the suspended substance and the soluble substance, flows. Vessel 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 concentration meter 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 which is the liquid to be measured. The microwave densitometer 3 detects the total solid content concentration (TS concentration) of the sewage sludge that is 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. Further, the soluble substance concentration calculator 6 stores in advance a calibration curve showing the relationship between the conductivity and the soluble substance concentration as shown in FIG. 1, and based on this 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 densitometer converter 5 is
The detection signal from the microwave densitometer 3 is converted into a total solid content concentration signal (TS concentration signal) and output. Furthermore, the suspended substance concentration calculator 7 calculates, based on the soluble substance concentration calculated by the soluble substance concentration calculator 6 and the value of the total solid content concentration signal from the microwave type densitometer converter 5, The calculation of (total solid content concentration-soluble substance concentration) is performed to calculate the concentration of the suspended substance, and the 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 constructed as above will be described. In FIG. 4, the signal detected by the conductivity detector 2 is sent to the conductivity meter converter 4, and is input from the conductivity meter converter 4 to the soluble substance concentration calculator 6 as a conductivity signal. The soluble substance concentration calculator 6 stores in advance a calibration curve showing the relationship between the electrical conductivity and the soluble substance concentration as shown in FIG. 1, and based on this calibration curve, the conductivity value is used to determine the solubility. The concentration of the active substance 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, and in this microwave type densitometer converter 5, the total solid content concentration signal (TS concentration signal ), Is output to the outside as a TS concentration signal, and is input to the suspended substance 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 suspension substance concentration calculator 7 calculates (concentration of total solid content-concentration of soluble substance) = suspension substance concentration and outputs it as a suspension substance concentration signal (SS concentration signal) to the outside. It

【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 the soluble substance concentration signal independently. As described above, the concentration measuring device according to the present embodiment includes the conductivity detector 2 for detecting the conductivity of the sewage sludge, which is the liquid to be measured containing the suspended substance and the soluble substance, and the sewage sludge, which is the liquid to be measured. Microwave type densitometer 3 which is a total solid content concentration detecting means for detecting the total solid content concentration (TS concentration) of, and a conductivity detector 2
A conductivity meter converter 4 for converting the detection signal from the sensor into a conductivity signal and outputting the conductivity signal, and a calibration curve showing the relationship between the conductivity and the concentration of the soluble substance are stored, and the conductivity meter is based on this calibration curve. The soluble substance concentration calculator 6 for calculating the concentration of the soluble substance by performing calculation using the value of the conductivity signal from the converter 4 and the detection signal from the microwave densitometer 3 are the total solid content concentration signals. Microwave type densitometer converter 5 for converting and outputting (TS concentration signal), soluble substance concentration calculated by the soluble substance concentration calculator 6 and total solid content from the microwave type densitometer converter 5 Based on the value of the concentration signal, (total solid content concentration-
The concentration of the soluble substance is calculated to calculate the concentration of the suspended substance, and the suspended substance concentration calculator 7 outputs 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 sewage sludge, which is the liquid to be measured containing suspended substances and soluble substances, the concentration of soluble substances, the concentration of suspended substances (SS concentration), and the concentration of total solids (TS concentration) It is possible to separately obtain and as measured values and to continuously measure.

【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 finely, and the process operation efficiency 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 overall structure when the concentration measuring apparatus of this embodiment is applied to the measurement of sewage sludge concentration.

【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 detects the conductivity, which is attached to the sewage sludge piping line 11 through which the sewage sludge which is the liquid to be measured containing the suspended substance and the soluble substance flows. Device 12, an ultrasonic densitometer 13 as a suspended matter concentration detecting means, and a conductivity meter converter 14
, Soluble substance concentration calculator 16, ultrasonic type densitometer converter 15, total solids 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 which is the liquid to be measured. The ultrasonic densitometer 13 detects the concentration of suspended matter (SS concentration) in the sewage sludge, which is 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 in advance a calibration curve showing the relationship between the conductivity and the soluble substance concentration as shown in FIG. 1, and based on this calibration curve, conductivity meter conversion is performed. The calculation is performed using the value of the conductivity signal from the container 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。
Further, 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 it. Furthermore, the total solid content concentration calculator 17 calculates, 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 densitometer converter 15, The calculation of (concentration of suspended substance + concentration of soluble substance) is performed to calculate the concentration of the total solid content, and the total solid content 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 constructed as above will be described. In FIG. 5, the signal detected by the conductivity detector 12 is the conductivity meter converter 14
Is sent to the soluble substance concentration calculator 16 as a conductivity signal from the conductivity meter converter 14. The soluble substance concentration calculator 16 stores in advance a calibration curve showing the relationship between the electrical conductivity and the soluble substance concentration as shown in FIG. 1, and based on this calibration curve, the conductivity value is used to determine the dissolution. The concentration signal of the solid substance is calculated, and this concentration signal is used as the total solid 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 type densitometer detector 13 is sent to the ultrasonic type densitometer converter 15, and in this ultrasonic type densitometer converter 15, the suspended substance concentration signal (SS concentration signal ), Is output to the outside as an SS concentration signal, and is input to the total solids 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,
(Suspension substance concentration + Soluble substance concentration) = Total solid content concentration is calculated and 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 independently output the soluble substance concentration signal.
As described above, the concentration measuring device according to the present embodiment includes the conductivity detector 12 that detects the conductivity of the sewage sludge, which is the liquid to be measured containing the suspended substance and the soluble substance, and the sewage sludge, which is the liquid to be measured. 1. An ultrasonic densitometer 13 for detecting the concentration of suspended solids (SS concentration), a conductivity meter converter 14 for converting the detection signal from the conductivity detector 12 into a conductivity signal and outputting the same, and FIG. The calibration curve showing the relationship between the conductivity and the concentration of the soluble substance as shown in FIG. 3 is stored, and the calculation is performed using the value of the conductivity signal from the conductivity meter converter 14 based on this calibration curve, Ultrasonic concentration meter conversion for converting the detection signal from the soluble substance concentration calculator 16 for calculating the concentration of the soluble substance and the ultrasonic concentration meter 13 into a suspension substance concentration signal (SS concentration signal) and outputting the signal. Dissolution calculated by vessel 15 and soluble substance concentration calculator 16 Substance concentration and ultrasonic densitometer transducer 1
Based on the value of the suspended solids concentration signal from 5, the calculation of (suspended solids concentration + soluble substance concentration) is performed to calculate the concentration of total solids, and the total solids concentration signal (TS concentration signal) is calculated. It is composed of a total solid content concentration 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 sewage sludge, which is the liquid to be measured containing suspended substances and soluble substances, the soluble substance concentration, total solids concentration (TS concentration), and suspended substance concentration (SS concentration) It is possible to separately obtain and as measured values and to continuously measure.

【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 process operation efficiency 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 overall structure when the concentration measuring apparatus of this embodiment is applied to the measurement of sewage sludge concentration. Will be omitted and the description will be 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 the pipe branching from the sewage sludge pipe line 1. The filter 25 is provided to guide the sewage sludge to the conductivity detector 2.

【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。
As a result, a part (mainly large solid content and fibrous content) of suspended matter 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, the valve 21 is provided on the primary side of the filter 25 and the valve 23 is provided on the secondary side of the filter 25 on the 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。
Further, a drain pipe is provided branching from the branch pipe, and a valve 22 is provided on the drain pipe. Further, a valve 24 communicating with the tap water supply port is provided on the secondary side of the filter 25.

【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。
Furthermore, 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 away the solid content and the fiber content 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 having the above-mentioned structure will be described. In addition, 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 is branched from the sewage sludge piping line 1 and guided to the filter 25 via the valve 21 (normally open). And this filter 2
The filtrate from which large solids and fibrous components have been removed in 5 flows to the conductivity detector 2 via the valve 23 (normally open), where the conductivity is detected. The filtrate after the conductivity detection is discharged to the outside from the drain pipe.

【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 cleaning controller 20 causes the filter 25
At the time of cleaning, the opening / 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 long-term use and the filtrate cannot be sufficiently obtained, the filter 25 is periodically replaced with tap water every four hours, for example. It is preferable to perform washing. Then, at the time of this backwashing, the washing controller 20
The valves 21 and 23 are closed, the valve 22 is opened, and the valve 24 is opened to filter the tap water with the filter 25.
Of the filter 25, the solid content and the fibrous content adhering to the primary side of the filter 25 are washed away by the water pressure, and are discharged to the outside from the drain pipe through the valve 22. After completion of this backwashing operation, 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 backwashing, the conductivity value is held at the value just before the start of backwashing. 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 (solid content or fibrous content) in the liquid to be measured. ) Is removed, and this filter 25 is backwashed to filter 2
Valves 21 to wash away solids and fibrous materials attached to 5
24 and a cleaning controller 20 for controlling the opening and closing thereof are provided.

【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 the liquid to be measured containing suspended substances and soluble substances, the soluble substance concentration, total solids concentration (TS concentration), and suspended substance concentration (SS concentration) It becomes possible to separately obtain and as measured values, and to measure continuously and 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 it is attempted to continuously detect the electrical conductivity of sewage sludge, the electrode part of the detector may be clogged with large solids or fibrous components in the sewage sludge for a long time. Since it may be difficult to continuously detect the conductivity, it is possible to stably detect the conductivity for a long time by detecting the conductivity of the filtrate applied with the filter 25 as in the present embodiment. It will be 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 same manner as described below. (A) In the third embodiment, a filter 25 for removing a part (solid content or fibrous content) of suspended substances of sewage sludge in the liquid to be measured, and a filter 25 for backwashing the filter 25 are used. Valve 21 for flushing solids and fibrous materials adhering to 25
~ 24 and the cleaning controller 20 for controlling the opening and closing
The case where the backwashing means consisting of the above is added to the concentration measuring device of the first embodiment has been described, but the present invention is not limited to this, and the filter 25 and the backwashing means are provided in the second embodiment. It may be configured to be added to the concentration measuring device of.

【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 (solid content or fibrous content) of suspended substances of sewage sludge in the liquid to be measured.
The filter 25 for removing the water and the backwashing means including the valves 21 to 24 for backwashing the filter 25 to wash away the solid content and the fiber content adhering to the filter 25 and the wash controller 20 for controlling the opening and closing of the filter are used together. Although the case has been described, the present invention is not limited to this, and the backwashing 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、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おい
て、まず、請求項1に対応する発明によれば、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
演算手段とを備えるようにしたので、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
質濃度を測定することが可能な濃度測定装置が提供でき
る。
As described above, in the device for measuring the concentration of the measured liquid containing the suspended substance and the soluble substance, first, according to the invention corresponding to claim 1, the conductivity of the measured liquid is measured. Conductivity detecting means for detecting, and using the value of the conductivity detected by the conductivity detecting means, the solubility of the soluble substance by performing a calculation based on the relational expression of the conductivity and the soluble substance concentration obtained in advance. Since a soluble substance concentration calculating means for calculating the concentration is provided, a concentration measuring device capable of measuring the concentration of the soluble substance when measuring the concentration of the solution to be measured containing the suspended substance and the soluble substance is provided. Can be provided.

【0065】また、請求項2に対応する発明によれば、
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、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るように
したので、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 invention corresponding to claim 2,
Using the conductivity detecting means for detecting the conductivity of the liquid to be measured and the value of the conductivity detected by the conductivity detecting means, the calculation is performed based on the relational expression between the conductivity and the soluble substance concentration obtained in advance. The soluble substance concentration calculation means for calculating the concentration of the soluble substance, the total solid content concentration detection means for detecting the total solid content concentration of the liquid to be measured, and the soluble substance calculated by the soluble substance concentration calculation means Based on the concentration and the total solid content concentration detected by the total solid content concentration detection means, the calculation of (total solid content concentration-soluble substance concentration) is performed to calculate the concentration of the suspended substance Since it is equipped with and, the concentration of the soluble substance, the concentration of the suspended substance, and the concentration of the total solid content are measured separately and continuously when measuring the concentration of the measured liquid containing the suspended substance and the soluble substance. Possible Measuring device can be provided.

【0066】さらに、請求項3に対応する発明によれ
ば、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、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演算
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るよう
にしたので、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。
Further, according to the invention corresponding to claim 3, it is obtained in advance by using the conductivity detecting means for detecting the conductivity of the liquid to be measured and the value of the conductivity detected by the conductivity detecting means. The soluble substance concentration calculating means for calculating the concentration of the soluble substance by performing the calculation based on the relational expression between the conductivity and the concentration of the soluble substance, and the suspended substance concentration detection for detecting the concentration of the suspended substance of the liquid to be measured Means, and a calculation of (suspended substance concentration + dissolved substance concentration) based on the soluble substance concentration calculated by the soluble substance concentration calculation device and the suspended substance concentration detected by the suspended substance concentration calculation device. Since the total solid content concentration calculating means for calculating the total solid content concentration is provided, the concentration of the soluble substance, the concentration of the suspended substance, and the concentration of the suspended substance at the time of measuring the concentration of the solution to be measured containing the suspended substance and the soluble substance,
It is possible to provide a concentration measuring device capable of separately and continuously measuring the concentration of total solids.

【0067】一方、請求項4に対応する発明によれば、
上記請求項1乃至請求項3のいずれか1項に対応する発
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
うにしたので、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
しかも長期間安定に測定することが可能な濃度測定装置
が提供できる。
On the other hand, according to the invention corresponding to claim 4,
In the concentration measuring device of the invention corresponding to any one of claims 1 to 3, filter means for removing a part (solid content or fibrous content) of suspended matter in the liquid to be measured is added. Since the conductivity of the filtrate is detected by the filter means, the concentration of the soluble substance, the concentration of the suspended substance, and the concentration of the total solid content are measured when measuring the concentration of the liquid to be measured containing the suspended substance and the soluble substance. It is possible to provide a concentration measuring device capable of separately and continuously measuring each of them stably for a long period of time.

【0068】また、請求項5に対応する発明によれば、
上記請求項4に対応する発明の濃度測定装置において、
フィルタを逆洗浄して当該フィルタ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の
で、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しかもより一
層長期間安定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 invention corresponding to claim 5,
In the concentration measuring device of the invention according to claim 4,
Since a backwashing means for washing back the filter to wash away the solids and fibrous substances adhering to the filter was added, when measuring the concentration of the solution to be measured containing suspended substances and soluble substances, the soluble substances It is possible to provide a concentration measuring device capable of measuring the concentration, the concentration of suspended solids, and the concentration of total solids separately, continuously, and stably for a longer period of time.

【図面の簡単な説明】[Brief description of drawings]

【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 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 form 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 form 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 the 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 diagram showing an example of a conventional densitometer.

【符号の説明】[Explanation of symbols]

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。 1 ... Sewage sludge piping line, 2 ... Conductivity detector, 3 ... Microwave densitometer, 4 ... Conductivity meter converter, 5 ... Microwave 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 densitometer detector, 14 ... conductivity meter converter, 15 ... super Sound wave type densitometer converter, 16 ... Soluble substance concentration calculator, 17 ... Total solid content concentration calculator (TS concentration calculator), 20 ... Cleaning controller, 21, 22, 23, 24 ... Valve, 25 ... Filter .

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 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おいて、 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、 を備えて成ることを特徴とする濃度測定装置。
1. An apparatus for measuring the concentration of a liquid to be measured containing a suspended substance and a soluble substance, wherein the electric conductivity is detected by the electric conductivity detecting unit for detecting the electric conductivity of the liquid to be measured. And a soluble substance concentration calculating means for calculating the concentration of the soluble substance by performing an operation based on a relational expression between the conductivity and the soluble substance concentration obtained in advance using the value of the electrical conductivity. A concentration measuring device characterized by the above.
【請求項2】 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おいて、 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。
2. An apparatus for measuring the concentration of a liquid to be measured containing a suspended substance and a soluble substance, wherein the electric conductivity is detected by the electric conductivity detecting unit for detecting the electric conductivity of the liquid to be measured. Using the value of the conductivity, a soluble substance concentration calculating means for calculating the concentration of the soluble substance by performing a calculation based on a relational expression between the conductivity and the soluble substance concentration obtained in advance, the liquid to be measured Based on the total solid content concentration detection means for detecting the total solid content concentration of, the soluble substance concentration calculated by the soluble substance concentration calculation means and the total solid content concentration detected by the total solid content concentration detection means And a suspension substance concentration calculating means for calculating the concentration of the suspended substance by performing a calculation of (total solid content concentration-soluble substance concentration).
【請求項3】 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おいて、 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演算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。
3. An apparatus for measuring the concentration of a liquid to be measured containing a suspended substance and a soluble substance, wherein the electric conductivity is detected by the electric conductivity detecting unit for detecting the electric conductivity of the liquid to be measured. Using the value of the conductivity, a soluble substance concentration calculating means for calculating the concentration of the soluble substance by performing a calculation based on a relational expression between the conductivity and the soluble substance concentration obtained in advance, the liquid to be measured Based on the suspended substance concentration detection means for detecting the suspended substance concentration of, and the soluble substance concentration calculated by the soluble substance concentration calculation means and the suspended substance concentration detected by the suspended substance concentration calculation means And a total solid content concentration calculating means for calculating a total solid content concentration by performing a calculation of (suspended substance concentration + soluble substance concentration).
【請求項4】 前記請求項1乃至請求項3のいずれか1
項に記載の濃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。
4. The method according to any one of claims 1 to 3.
In the concentration measuring device according to the item, a part (solid content or fibrous content) of suspended matter in the measured liquid
A concentration measuring device characterized in that a filter means for removing is added, and the conductivity of the filtrate by the filter means is detected.
【請求項5】 前記請求項4に記載の濃度測定装置にお
いて、 前記フィルタを逆洗浄して当該フィルタに付着した固形
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
ことを特徴とする請求項4に記載の濃度測定装置。
5. The concentration measuring device according to claim 4, wherein a backwashing means for backwashing the filter to wash away solid matter and fibrous matter adhering to the filter is added. The concentration measuring device according to claim 4.
JP19161895A 1995-07-27 1995-07-27 Concentration measuring device Expired - Fee Related JP3335806B2 (en)

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 true JPH0943181A (en) 1997-02-14
JP3335806B2 JP3335806B2 (en) 2002-10-21

Family

ID=16277638

Family Applications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6260406B1 (en) 1998-10-02 2001-07-17 Kabushiki Kaisha Toshiba Densitometer using microwaves
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
JP2006023148A (en) * 2004-07-07 2006-01-26 Dkk Toa Corp Chlorine demand amount measuring instrument, water quality control system, chlorine demand amount measuring method and water quality control method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6260406B1 (en) 1998-10-02 2001-07-17 Kabushiki Kaisha Toshiba Densitometer using microwaves
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
JP2006023148A (en) * 2004-07-07 2006-01-26 Dkk Toa Corp Chlorine demand amount measuring instrument, water quality control system, chlorine demand amount measuring method and water quality control method
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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