JPH0389139A - Measurement of moisture - Google Patents
Measurement of moistureInfo
- Publication number
- JPH0389139A JPH0389139A JP22436189A JP22436189A JPH0389139A JP H0389139 A JPH0389139 A JP H0389139A JP 22436189 A JP22436189 A JP 22436189A JP 22436189 A JP22436189 A JP 22436189A JP H0389139 A JPH0389139 A JP H0389139A
- Authority
- JP
- Japan
- Prior art keywords
- sample
- heater
- drying
- moisture
- infrared
- 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.)
- Pending
Links
- 238000005259 measurement Methods 0.000 title abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 18
- 238000000691 measurement method Methods 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 21
- 239000000126 substance Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 2
- 238000007603 infrared drying Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、水処理等の環境保全、化学工業２食品工業、
薬品工業などの分野で取り扱う物質中の水分を測定する
方法に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention is applicable to environmental protection such as water treatment, chemical industry, food industry,
This relates to a method for measuring moisture in substances handled in fields such as the pharmaceutical industry.
水処理等の環境保全、化学工業１食品工業、薬品工業な
どの分野においては、プロセスの制御あるいは品質管理
を行うために、取り扱う物質中の水分を精度良く、迅速
に測定することが重要である。In fields such as environmental conservation such as water treatment, chemical industry 1 food industry, and pharmaceutical industry, it is important to accurately and quickly measure the moisture content of the substances handled in order to control processes or control quality. .
このような水分測定を行う従来の方法としては、超音波
減衰法、赤外線吸収法、誘電率法、電気抵抗法、カール
フィッシャー法、あるいは赤外線乾燥法などが知られて
いた。Conventional methods for measuring moisture content include the ultrasonic attenuation method, the infrared absorption method, the dielectric constant method, the electrical resistance method, the Karl Fischer method, and the infrared drying method.
前記従来の水分測定法のうち、超音波減衰法。 Among the conventional moisture measurement methods, the ultrasonic attenuation method.
赤外線吸収法２誘電率法、電気抵抗法は、電気的測定法
であって測定に要する時間は極めて短い。Infrared absorption method 2 The dielectric constant method and the electrical resistance method are electrical measurement methods, and the time required for measurement is extremely short.
しかしながら、これらはいずれも直接に水分を測定する
方法ではないので、試料に含まれる固体の状態が変化す
ると、データの信頼性が低下することが知られている。However, since none of these methods directly measures moisture, it is known that the reliability of the data decreases if the state of the solid contained in the sample changes.
カールフィッシャー法は、化学的測定法であり、微量の
水分の測定に適するが、測定が複雑で時間がかかるとい
う欠点を持っている。赤外線乾燥法は、加熱乾燥前後の
重量を秤量することによって水分を測定する方法であり
、最も信頼性が高い方法であるが、測定に要する時間が
長いことが欠点とされている。The Karl Fischer method is a chemical measurement method and is suitable for measuring trace amounts of moisture, but it has the disadvantage that the measurement is complicated and time-consuming. The infrared drying method is a method of measuring moisture content by weighing the weight before and after heating and drying, and is the most reliable method, but the drawback is that it takes a long time for measurement.
本発明は、従来の赤外線乾燥法を改良し、試料中の水分
を迅速かつ正確に測定し、プロセス制御あるいは品質管
理に有利に適用することができる水分測定方法を提供し
ようとするものである。The present invention aims to improve the conventional infrared drying method and provide a moisture measurement method that can quickly and accurately measure moisture in a sample and can be advantageously applied to process control or quality control.
本発明は、試料皿に載せた水分を含む試料への赤外線の
照射と試料皿の加熱とを、それぞれ別個の熱源を併用す
ることによって前記試料を乾燥し、乾燥前後の試料の重
量変化から試料の水分を測定することを特徴とする水分
測定方法である。The present invention dries the sample by irradiating the sample containing moisture placed on the sample plate with infrared rays and heating the sample plate using separate heat sources, and detects the weight change of the sample before and after drying. This is a moisture measurement method characterized by measuring the moisture content of.
次に本発明の作用について説明する。 Next, the operation of the present invention will be explained.
本発明における基本的な構成は、第１図に示すように、
赤外線ヒータ１、試料皿加熱袋Ｗ４および試料皿７から
なり、試料皿７に水分を含む試料Ｓを入れ、試料Ｓに対
する赤外線ヒータｌからの赤外線の照射と、試料皿加熱
装置４で試料皿７の加熱を行うことによって、試料Ｓを
加熱乾燥し、乾燥前後の試料Ｓの重量変化、即ち試料Ｓ
の乾燥前の重！ ｗ ＋ と乾燥後の重！ ｗ ｔから
、Ｗ＋ Ｗｚ
試料Ｓの水分＝ Ｘ１００％１
を得ることができるものである。The basic configuration of the present invention is as shown in FIG.
It consists of an infrared heater 1, a sample dish heating bag W4, and a sample dish 7. A sample S containing moisture is placed in the sample dish 7, and the sample S is irradiated with infrared rays from the infrared heater 1, and the sample dish heating device 4 heats the sample dish 7. By heating the sample S, the sample S is heated and dried, and the weight change of the sample S before and after drying, that is, the sample S
Heavy before drying! w + and weight after drying! From wt, W+Wz Moisture content of sample S=X100%1 can be obtained.
赤外線ヒータ夏としては、赤外線シースヒータ。Infrared heater In the summer, there is an infrared sheath heater.
赤外線ランプ、セラミックヒータなどを使用することが
でき、また遠赤外線領域の波長を輻射する遠赤外線ヒー
タを使用しても良い。An infrared lamp, a ceramic heater, etc. can be used, and a far-infrared heater that emits wavelengths in the far-infrared region may also be used.
試料皿７の加熱は、高周波誘導加熱あるいはヒータによ
る伝熱によって行う。導体の材料で作成した試料皿は、
高周波の電磁誘導作用によって容易に加熱され、また熱
伝導率の大きい材料で作成した試料皿は、ホットプレー
トなどのヒータ上に載せることによって容易に加熱され
る。The sample dish 7 is heated by high frequency induction heating or heat transfer using a heater. A sample dish made of conductive material is
A sample plate made of a material that is easily heated by high-frequency electromagnetic induction and has high thermal conductivity can be easily heated by placing it on a heater such as a hot plate.
なお、試料Ｓの乾燥時に試料Ｓが焦げつくのを防ぐため
に、赤外線ヒータ１に赤外線ヒータ用温度センサ３を設
けて赤外線ヒータ用温度調節器２と関連させ、また試料
皿７に試料皿加熱用温度センサ６を設けて試料皿加熱装
置用温度調節器５と関連させ、赤外線ヒータ１と試料皿
加熱装置４の温度を制御することが好ましい０通常は、
最初に赤外線ヒータ１と試料皿加熱装置４の出力を大き
くして試料Ｓを急速に乾燥し、試料Ｓの水分の低下とと
もに試料Ｓが焦げ易くなるので、試料Ｓの水分の低下と
ともに赤外線ヒータｌと試料皿加熱装置４の出力を小さ
くすることによって、短時間で正確に試料の水分を測定
することができる。In order to prevent the sample S from burning during drying, the infrared heater 1 is provided with an infrared heater temperature sensor 3 and associated with the infrared heater temperature controller 2, and the sample plate 7 is provided with an infrared heater temperature sensor 3 for heating the sample plate. Preferably, a temperature sensor 6 is provided and associated with the temperature regulator 5 for the sample dish heating device to control the temperature of the infrared heater 1 and the sample dish heating device 4.
First, the output of the infrared heater 1 and the sample dish heating device 4 are increased to quickly dry the sample S. As the moisture content of the sample S decreases, the sample S becomes easily burnt. By reducing the output of the sample plate heating device 4, the moisture content of the sample can be measured accurately in a short time.
環境保全の分野で取り扱う下水混合生汚泥の脱水ケーキ
５．４６ ｇを試料として試料皿に入れ、本発明により
遠赤外線ヒータと、試料皿加熱装置としてのホットプレ
ートとを併用して、遠赤外線ヒータの初期の表面温度が
５００℃、試料皿の初期の表面温度が３００℃になるよ
うに制御し、時間経過とともにそれぞれの表面温度を段
階的に低下させて乾燥実験を行った。その結果は、第２
図に示すように、乾燥時間９分で試料重量は１．３４
ｇとなり、脱水ケーキ含水率は７５．５％と測定された
。この測定値は、従来の１１０℃での恒量乾燥法１２時
間で測定した水分７５．５％と良く一致した。A sample of 5.46 g of a dehydrated cake of mixed raw sewage sludge handled in the field of environmental conservation was placed in a sample dish, and according to the present invention, a far-infrared heater was heated using a combination of a far-infrared heater and a hot plate as a sample-plate heating device. The initial surface temperature of the sample plate was controlled to be 500° C., and the initial surface temperature of the sample dish was controlled to be 300° C., and the drying experiment was conducted by gradually lowering each surface temperature over time. The result is the second
As shown in the figure, the sample weight was 1.34 with a drying time of 9 minutes.
g, and the moisture content of the dehydrated cake was determined to be 75.5%. This measured value was in good agreement with the moisture content of 75.5% measured by the conventional constant weight drying method at 110° C. for 12 hours.
一方、従来例として、試料皿を加熱しないで遠赤外線ヒ
ータのみを用いて、遠赤外線ヒータの初期の表面温度を
５００℃にして、同じ試料５．５９ｇを乾燥したところ
、第２図に示すように、乾燥時間２３分で試料重量は１
．３４ｇとなり、含水率７６．０％と測定された。On the other hand, as a conventional example, when 5.59 g of the same sample was dried using only a far-infrared heater without heating the sample dish, and the initial surface temperature of the far-infrared heater was set to 500°C, the result was as shown in Figure 2. The sample weight was 1 with a drying time of 23 minutes.
．． The weight was 34g, and the moisture content was measured to be 76.0%.
このように、本発明によれば、従来の遠赤外線乾燥法に
比べて大幅に乾燥時間が短い。即ち、極めて短時間で試
料の水分を測定できることがわかる。As described above, according to the present invention, the drying time is significantly shorter than that of the conventional far-infrared drying method. That is, it can be seen that the moisture content of the sample can be measured in an extremely short time.
これは、従来の遠赤外線乾燥法が主に輻射で乾燥してい
るのに対し、本発明では輻射と同時に試料皿からの伝熱
の相乗効果によって試料が効率良く加熱されるためであ
ると考えられる。This is thought to be because while conventional far-infrared drying methods dry mainly by radiation, in the present invention the sample is efficiently heated by the synergistic effect of radiation and heat transfer from the sample dish. It will be done.
以上述べたように、本発明によれば、環境保全。 As described above, according to the present invention, environmental conservation can be achieved.
化学工業９食品工業、薬品工業などの各分野で取り扱う
物質の水分を精度良く、迅速に測定することができ、本
発明をプロセスの制御あるいは品質管理に適用すること
によって、省エネルギー化。Chemical industry 9 It is possible to accurately and quickly measure the moisture content of substances handled in various fields such as the food industry and the pharmaceutical industry, and energy savings can be achieved by applying the present invention to process control or quality control.
省資源化あるいは省力化などの有益なる効果を奏するも
のである。This has beneficial effects such as resource saving and labor saving.
第１図は本発明の基本的構成の説明図で、第２図は本発
明と従来法の実験例における乾燥時間と試料重量との関
係を示す線図である。
１・・・赤外線ヒータ、２・・・赤外線ヒータ用温度調
節２Ｌ３・・・赤外線ヒータ用温度センサ、４・・・試
料皿加熱装置、５・・・試料皿加熱装置用温度調節器、
６・・・試料皿加熱装置用温度センサ、７・・・試料皿
、Ｓ・・・試料。FIG. 1 is an explanatory diagram of the basic structure of the present invention, and FIG. 2 is a diagram showing the relationship between drying time and sample weight in experimental examples of the present invention and the conventional method. DESCRIPTION OF SYMBOLS 1... Infrared heater, 2... Infrared heater temperature adjustment 2L3... Infrared heater temperature sensor, 4... Sample plate heating device, 5... Temperature regulator for sample plate heating device,
6... Temperature sensor for sample plate heating device, 7... Sample plate, S... Sample.
Claims (1)
と試料皿の加熱とを、それぞれ別個の熱源を併用するこ
とによって前記試料を乾燥し、乾燥前後の試料の重量変
化から試料の水分を測定することを特徴とする水分測定
方法。(1) Dry the sample by irradiating the sample containing moisture on the sample plate with infrared rays and heating the sample plate using separate heat sources, and check the weight change of the sample before and after drying. A moisture measurement method characterized by measuring moisture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22436189A JPH0389139A (en) | 1989-09-01 | 1989-09-01 | Measurement of moisture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22436189A JPH0389139A (en) | 1989-09-01 | 1989-09-01 | Measurement of moisture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0389139A true JPH0389139A (en) | 1991-04-15 |
Family
ID=16812556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22436189A Pending JPH0389139A (en) | 1989-09-01 | 1989-09-01 | Measurement of moisture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0389139A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH078754U (en) * | 1993-07-09 | 1995-02-07 | 株式会社ケット科学研究所 | Heating / drying type moisture meter |
| JPH0712957U (en) * | 1993-07-27 | 1995-03-03 | 株式会社ケット科学研究所 | Heating / drying type moisture meter |
| JP2009300246A (en) * | 2008-06-13 | 2009-12-24 | A & D Co Ltd | Moisture meter |
| JP2011033634A (en) * | 2010-11-01 | 2011-02-17 | Kajiwara Kogyo Kk | Method and apparatus for measuring hardness of processed material and immersion processing apparatus |
| JP2013137323A (en) * | 2013-02-28 | 2013-07-11 | A & D Co Ltd | Moisture meter |
| JP2014066726A (en) * | 2006-04-25 | 2014-04-17 | Mettler-Toledo Ag | Measuring instrument for moisture weight determination |
| US10527533B2 (en) | 2015-09-11 | 2020-01-07 | Cem Corporation | Moisture and volatiles analyzer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5988643A (en) * | 1982-11-12 | 1984-05-22 | Sumio Ando | Apparatus for measuring water content of substance to be dried in vacuum dryer |
| JPS645229U (en) * | 1987-06-26 | 1989-01-12 |
-
1989
- 1989-09-01 JP JP22436189A patent/JPH0389139A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5988643A (en) * | 1982-11-12 | 1984-05-22 | Sumio Ando | Apparatus for measuring water content of substance to be dried in vacuum dryer |
| JPS645229U (en) * | 1987-06-26 | 1989-01-12 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH078754U (en) * | 1993-07-09 | 1995-02-07 | 株式会社ケット科学研究所 | Heating / drying type moisture meter |
| JPH0712957U (en) * | 1993-07-27 | 1995-03-03 | 株式会社ケット科学研究所 | Heating / drying type moisture meter |
| JP2014066726A (en) * | 2006-04-25 | 2014-04-17 | Mettler-Toledo Ag | Measuring instrument for moisture weight determination |
| JP2009300246A (en) * | 2008-06-13 | 2009-12-24 | A & D Co Ltd | Moisture meter |
| JP2011033634A (en) * | 2010-11-01 | 2011-02-17 | Kajiwara Kogyo Kk | Method and apparatus for measuring hardness of processed material and immersion processing apparatus |
| JP2013137323A (en) * | 2013-02-28 | 2013-07-11 | A & D Co Ltd | Moisture meter |
| US10527533B2 (en) | 2015-09-11 | 2020-01-07 | Cem Corporation | Moisture and volatiles analyzer |
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