JPH0418266B2 - - Google Patents
Info
- Publication number
- JPH0418266B2 JPH0418266B2 JP10318282A JP10318282A JPH0418266B2 JP H0418266 B2 JPH0418266 B2 JP H0418266B2 JP 10318282 A JP10318282 A JP 10318282A JP 10318282 A JP10318282 A JP 10318282A JP H0418266 B2 JPH0418266 B2 JP H0418266B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- chamber
- pressurized air
- measurement chamber
- concentration
- 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
Links
- 239000010802 sludge Substances 0.000 claims description 35
- 238000005259 measurement Methods 0.000 claims description 25
- 239000012528 membrane Substances 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims 1
- 239000000725 suspension Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/222—Constructional or flow details for analysing fluids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/024—Mixtures
- G01N2291/02433—Gases in liquids, e.g. bubbles, foams
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Description
【発明の詳細な説明】
この発明は汚泥等の濃度を測定する濃度測定装
置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concentration measuring device for measuring the concentration of sludge and the like.
懸濁液の中で、例えば汚水処理工程で発生する
汚泥等の場合には、液中に微細気泡やガス泡を含
んでいる。このような気泡等が含まれていると、
超音波、光、放射線等を使用して懸濁濃度を測定
する測定方法の場合には、実濃度以上または以下
となつて測定値に誤差を生ずる原因となる。即
ち、超音波を用いて懸濁濃度を測定する場合に
は、気液の界面で大きく反射散乱するため実濃度
より高濃度側に誤差を生じ、気泡量が多い場合は
振り切れて測定不能になることもある。一方、光
や放射線を用いて懸濁濃度を測定する場合には、
気泡の分だけ透過しやすくなるため実濃度より低
濃度側に誤差を生じることになる。 Among suspension liquids, for example, in the case of sludge generated in a sewage treatment process, the liquid contains fine bubbles and gas bubbles. If such bubbles are included,
In the case of a measurement method that uses ultrasonic waves, light, radiation, etc. to measure the suspended concentration, the concentration may be higher than or lower than the actual concentration, causing an error in the measured value. In other words, when measuring suspended concentration using ultrasonic waves, there is a large amount of reflection and scattering at the gas-liquid interface, resulting in an error on the higher concentration side than the actual concentration, and if there are a large number of bubbles, it will wave off and become impossible to measure. Sometimes. On the other hand, when measuring suspension concentration using light or radiation,
Since the bubbles make it easier to pass through, an error will occur on the lower concentration side than the actual concentration.
従つて、従来この種懸濁液の濃度測定において
は、汚泥管路自体の一部を所定の間隔を置いて２
つの弁で締切るようにし、その状態で一定値まで
加圧消泡することにより懸濁濃度を測定するよう
にしていた。つまり、懸濁液を加圧することによ
り気体の飽和溶解度を高め液中に含まれる気泡を
溶解させ、気泡の影響を除去していた。ところが
前述の如く２つの弁で仕切る様な構造にすると流
路を閉塞させないためにバイパス管路を併設する
ことが必要となる。また、本管をＴ字形に分岐し
て加圧容器を設けることも行われていたが、この
場合容器内への汚泥のサンプリングが難しいなど
何れの場合にも構造が複雑でサンプリングが難し
く、データの再現精度が出しにくいという欠点が
あつた。 Therefore, conventionally, when measuring the concentration of this type of suspension, a part of the sludge pipe itself is separated at a predetermined interval, and two
In this state, the suspension concentration was measured by pressurizing and defoaming to a certain value. In other words, by pressurizing the suspension liquid, the saturated solubility of the gas is increased, and the air bubbles contained in the liquid are dissolved, thereby eliminating the influence of the air bubbles. However, if the structure is partitioned by two valves as described above, it becomes necessary to provide a bypass line in order to prevent the flow path from being blocked. In addition, the main pipe was branched into a T-shape and a pressurized container was installed, but in both cases, the structure was complex, making it difficult to sample the sludge into the container, and it was difficult to collect data. The drawback was that it was difficult to achieve accurate reproducibility.
この発明は上記欠点を解決するためになされた
ものであつて、汚泥主管の一部に開閉弁を介して
密閉測定室を設け、しかも強制的にサンプリング
汚泥を入れ変える加圧膜を設けることによつて、
正確な濃度測定を行うと共に管内圧が低くてもサ
ンプリング汚泥の入れ変えを確実に行なえる濃度
測定装置を提供することを目的とする。 This invention was made in order to solve the above-mentioned drawbacks, and it is possible to provide a sealed measurement chamber in a part of the main sludge pipe via an on-off valve, and also to provide a pressurized membrane for forced exchange of sampling sludge. Then,
It is an object of the present invention to provide a concentration measuring device that can accurately measure concentration and reliably replace sampling sludge even when the pipe internal pressure is low.
以下、この発明の一実施例について図面を参照
して説明する。 An embodiment of the present invention will be described below with reference to the drawings.
汚泥を流通させる汚泥主管１には、隆起部２に
対向して一部が分岐して密閉測定室３が設けられ
ている。 A main sludge pipe 1 through which sludge flows is provided with a sealed measurement chamber 3 with a part branching off opposite a raised part 2.
上記密閉測定室３は、開口部４位置に設けられ
た弾性体からなる弾力スペーサ５と、汚泥主管１
にボルト締め等の方法により着脱自在に固設され
た半球状の外箱６とを有し、この外箱６と上記弾
力スペーサ５との間には、汚泥濃度検出子７が設
けられている。 The sealed measurement chamber 3 includes an elastic spacer 5 made of an elastic body provided at the opening 4 position, and a sludge main pipe 1.
A hemispherical outer box 6 is detachably fixed by bolting or the like, and a sludge concentration detector 7 is provided between the outer box 6 and the elastic spacer 5. .
この汚泥濃度検出子７は、互いに対向する一対
の超音波（光や放射線等でもよい）の送信器およ
びその受信器とから成り、その測定受信信号は記
録装置等にデータ伝送され処理される。 This sludge concentration detector 7 consists of a pair of ultrasonic wave (light, radiation, etc.) transmitters and their receivers facing each other, and the measurement reception signals are transmitted to a recording device or the like and processed.
一方、上記開口部３に接した弾力スペーサ５の
内側には、その開口面に合わせ軸８によつて回動
自在に軸支された開閉弁９が設けられている。開
閉弁９は実線で示すように弾力スペーサ５内に内
接したり、仮想線の如く垂直位置に回動でき、こ
の動作によつて汚泥主管１を流れる汚泥をサンプ
リングし、測定室３を密閉室とする。 On the other hand, on the inside of the elastic spacer 5 in contact with the opening 3, an on-off valve 9 is provided which is rotatably supported by a shaft 8 aligned with the opening surface. The on-off valve 9 can be inscribed in the elastic spacer 5 as shown by the solid line, or can be rotated to a vertical position as shown by the imaginary line. Through this operation, the sludge flowing through the sludge main pipe 1 is sampled, and the measurement chamber 3 is turned into a closed room. shall be.
そして、上記密閉測定室３の内部には、上記汚
泥濃度検出子７と共締された例えばダイアフラム
膜、ゴム隔膜等の可動性の加圧膜１０が設けら
れ、この加圧膜１０と密閉測定室３との間には加
圧空気室１１が仕切られている。 A movable pressure membrane 10, such as a diaphragm membrane or a rubber diaphragm, which is fastened together with the sludge concentration detector 7, is provided inside the sealed measurement chamber 3. A pressurized air chamber 11 is partitioned off from the chamber 3.
この加圧空気室１１には外箱６の一部に孔設し
た吸排気口１２を介して管１４が接続され、これ
によつて加圧空気が供給排出される。 A pipe 14 is connected to this pressurized air chamber 11 through an intake/exhaust port 12 formed in a part of the outer box 6, and pressurized air is supplied and discharged through this.
加圧空気はコンプレツサー１５から管１４に供
給されるが、この管１４には三方弁１７が設けら
れ、三方弁１７の一端はアスピレータ１６の減圧
側に接続されている。また、管１４の三方弁１７
よりコンプレツサーに近い側には弁１８を介し、
アスピレータ１６に加圧空気を供給できるように
なつている。 Pressurized air is supplied from a compressor 15 to a pipe 14, which is provided with a three-way valve 17, one end of which is connected to the pressure reducing side of an aspirator 16. In addition, the three-way valve 17 of the pipe 14
Through the valve 18 on the side closer to the compressor,
Pressurized air can be supplied to the aspirator 16.
そして、制御手段１３はタイマーを内蔵し、弁
１７，１８，８，濃度検出子７等を制御する。 The control means 13 has a built-in timer and controls the valves 17, 18, 8, concentration detector 7, etc.
次に、この発明の動作について説明する。 Next, the operation of this invention will be explained.
密閉測定室３内の汚泥の強制的入れ変えは、汚
泥主管１の管内圧が約0.3Kg・ｆ／cm2を境として
異なるので、以下別けて説明する。 The forced exchange of sludge in the sealed measurement chamber 3 will be explained separately below, since the internal pressure of the sludge main pipe 1 varies with a border of about 0.3 Kg·f/cm 2 .
(1) 管内圧が約0.3Kg・ｆ／cm2以上の場合。(1) When the pipe internal pressure is approximately 0.3Kg・f/cm 2 or more.
図において、仮想線で示すように開閉弁９を開
放状態下で、三方弁１７を操作して加圧空気室１
１に加圧空気（２〜５Kg・ｆ／cm2程度）を２〜３
秒程度導入する。すると加圧膜１０は実線で示す
停止位置から仮想線で示す加圧位置まで内方へ押
し出され、密閉測定室３内の汚泥は汚泥主管１側
へ排出される。 In the figure, the pressurized air chamber 1 is opened by operating the three-way valve 17 with the on-off valve 9 in the open state as shown by the phantom line.
Add 2 to 3 pieces of pressurized air ( about 2 to 5 kg・f/cm2) to 1.
Introduce it for about seconds. Then, the pressurizing membrane 10 is pushed inward from the stop position shown by the solid line to the pressurizing position shown by the imaginary line, and the sludge in the sealed measurement chamber 3 is discharged to the sludge main pipe 1 side.
次に、弁１８を開放して加圧空気を大気開放す
ると、管内圧により加圧膜１０は自動的に元の停
止位置まで戻り、密閉測定室３内にフレツシユな
汚泥が導入される。この一連の操作を１〜数回繰
り返し、密閉測定室３内の汚泥を完全に入れ変え
る。 Next, when the valve 18 is opened to release the pressurized air to the atmosphere, the pressure membrane 10 automatically returns to its original stop position due to the pressure inside the pipe, and fresh sludge is introduced into the sealed measurement chamber 3. This series of operations is repeated one to several times to completely replace the sludge in the sealed measurement chamber 3.
なお、コンプレツサー１５からの加圧空気を大
気中に開放するのは非効率的なのでコンプレツサ
ー１５からの加圧空気を弁で遮断し、別に設けた
弁により加圧室１１内の加圧空気を大気に開放す
るとよい。 Note that it is inefficient to release the pressurized air from the compressor 15 to the atmosphere, so a valve is used to shut off the pressurized air from the compressor 15, and a separate valve is used to release the pressurized air in the pressurized chamber 11 to the atmosphere. It is best to open it to
このように測定すべき汚泥の入れ変えが完了し
た後、開閉弁９を実線で示すように閉位置にし、
加圧空気室１１内に加圧空気を導入すると、測定
室３は密閉されているので、加圧膜１０の圧縮変
形により所定の圧力値に高められ、汚泥中の気泡
は溶解消滅する。 After the replacement of the sludge to be measured is completed in this way, the on-off valve 9 is placed in the closed position as shown by the solid line.
When pressurized air is introduced into the pressurized air chamber 11, since the measurement chamber 3 is sealed, the pressure is increased to a predetermined pressure value by compressive deformation of the pressurized membrane 10, and air bubbles in the sludge are dissolved and disappeared.
このような加圧下で濃度測定をすると気泡等の
含有による測定誤差は解消される。測定後、加圧
室１１内の加圧空気を大気開放し、開閉弁９を開
の状態に復帰させて測定行程を終了する。これら
の一連の動作は制御手段１３によつて自動的に制
御する。 Measuring the concentration under such pressure eliminates measurement errors due to inclusion of air bubbles, etc. After the measurement, the pressurized air in the pressurizing chamber 11 is released to the atmosphere, the on-off valve 9 is returned to the open state, and the measurement process is completed. These series of operations are automatically controlled by the control means 13.
(2) 管内圧が約0.3Kg・ｆ／cm2未満の場合は、以
下の操作を要する点が異なる。(2) The difference is that if the pipe internal pressure is less than approximately 0.3Kg・f/cm 2 , the following operations are required.
上述と同様に測定室３内への汚泥の入れ変えの
段階で、開閉弁９の開放状態で加圧空気を導入
し、加圧膜１０によつて汚泥を汚泥主管１へ排出
する。しかし、自然流下等の管内圧が0.3Kg・
ｆ／cm2以下では、管内圧だけでは加圧膜１０は上
記加圧位置から上記停止位置に反転しない。そこ
で、上記制御手段の三方弁１７を切換えて、コン
プレツサー１５からの加圧空気を遮断し、加圧室
１１からの管１４をアスピレータ１６の減圧側に
連通する。そして第２のバルブ１８を開放しアス
ピレータ１６のノズル側にコンプレツサー１５か
らの加圧空気を流通させると、アスピレータ１６
の減圧作用によつて、加圧空気室１１内は負圧に
なるので、加圧膜１０は元の停止位置まで反転
し、密閉測定室３内にフレツシユな汚泥が導入さ
れる。以下同様の操作を行い測定工程を終了す
る。 Similarly to the above, at the stage of replacing sludge into the measurement chamber 3, pressurized air is introduced with the on-off valve 9 in the open state, and the sludge is discharged into the sludge main pipe 1 through the pressurizing membrane 10. However, the pressure inside the pipe due to gravity flow is 0.3Kg・
f/cm 2 or less, the pressure membrane 10 cannot be reversed from the pressurized position to the stop position by the pipe internal pressure alone. Therefore, the three-way valve 17 of the control means is switched to cut off the pressurized air from the compressor 15 and connect the pipe 14 from the pressurizing chamber 11 to the reduced pressure side of the aspirator 16. Then, when the second valve 18 is opened and the pressurized air from the compressor 15 flows through the nozzle side of the aspirator 16, the aspirator 16
Due to the pressure reduction effect, the inside of the pressurized air chamber 11 becomes negative pressure, so the pressurized membrane 10 is reversed to its original stop position, and fresh sludge is introduced into the sealed measurement chamber 3. Thereafter, similar operations are performed to complete the measurement process.
尚、上記実施例では、加圧手段として空気圧を
用いたが、何らこれに限定されることなく、それ
以外の油圧等の手段を用いても差支えない。 In the above embodiment, air pressure was used as the pressurizing means, but the present invention is not limited to this in any way, and other means such as hydraulic pressure may be used.
以上のようにこの発明の濃度測定装置によれ
ば、懸濁液中の気泡等を溶解させ、しかも管内圧
が低くても加圧膜によつてサンプリング汚泥を入
れ変えて、正確な濃度測定が行なえる効果があ
る。 As described above, according to the concentration measuring device of the present invention, accurate concentration measurement is possible by dissolving air bubbles in the suspension and replacing the sampling sludge with the pressurized membrane even when the pipe internal pressure is low. There are effects that can be done.
図はこの発明の一実施例の縦断面図を示す。
１……汚泥主管、３……密閉測定室、７……汚
泥濃度検出子、９……開閉弁、１０……加圧膜、
１１……加圧空気室、１３……制御手段。
The figure shows a longitudinal sectional view of an embodiment of the invention. 1... Sludge main pipe, 3... Sealed measurement chamber, 7... Sludge concentration detector, 9... Open/close valve, 10... Pressure membrane,
11... Pressurized air chamber, 13... Control means.
Claims (1)
閉測定室と上記汚泥主管との間に設けられた開閉
弁と、上記密閉測定室に設けられた汚泥濃度検出
子と、上記密閉測定室の一部に設けられた可動性
の加圧膜と、この加圧膜で上記密閉測定室から仕
切形成された加圧空気室と、上記開閉弁を開放状
態でこの加圧空気室内に加圧空気を吸排気し、上
記密閉測定室内の汚泥を入れ替える制御手段とを
備えた濃度測定装置。1. A sealed measurement chamber branched from the sludge main pipe, an on-off valve provided between the sealed measurement chamber and the sludge main pipe, a sludge concentration detector provided in the sealed measurement chamber, and a closed measurement chamber branched from the sludge main pipe. A movable pressure membrane is provided in the chamber, a pressurized air chamber is formed by the pressurized membrane as a partition from the sealed measurement chamber, and pressurized air is introduced into the pressurized air chamber by opening the on-off valve. A concentration measuring device comprising a control means for sucking in and exhausting and replacing sludge in the sealed measurement chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10318282A JPS58219450A (en) | 1982-06-15 | 1982-06-15 | Measuring instrument for concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10318282A JPS58219450A (en) | 1982-06-15 | 1982-06-15 | Measuring instrument for concentration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58219450A JPS58219450A (en) | 1983-12-20 |
| JPH0418266B2 true JPH0418266B2 (en) | 1992-03-27 |
Family
ID=14347364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10318282A Granted JPS58219450A (en) | 1982-06-15 | 1982-06-15 | Measuring instrument for concentration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58219450A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0539491Y2 (en) * | 1985-05-21 | 1993-10-06 | ||
| JPH0535329Y2 (en) * | 1985-12-28 | 1993-09-08 | ||
| JP5068796B2 (en) * | 2009-09-30 | 2012-11-07 | 株式会社西原環境 | Ultrasonic sludge concentration measuring device |
| JP7373771B2 (en) * | 2020-07-16 | 2023-11-06 | パナソニックＩｐマネジメント株式会社 | Physical quantity measuring device |
| CN115803617A (en) * | 2020-07-16 | 2023-03-14 | 松下知识产权经营株式会社 | Physical quantity measuring device |
| JP7373772B2 (en) * | 2020-07-16 | 2023-11-06 | パナソニックＩｐマネジメント株式会社 | Physical quantity measuring device |
-
1982
- 1982-06-15 JP JP10318282A patent/JPS58219450A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58219450A (en) | 1983-12-20 |
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