JPS61290343A - Method and apparatus for measuring moisture - Google Patents
Method and apparatus for measuring moistureInfo
- Publication number
- JPS61290343A JPS61290343A JP60133567A JP13356785A JPS61290343A JP S61290343 A JPS61290343 A JP S61290343A JP 60133567 A JP60133567 A JP 60133567A JP 13356785 A JP13356785 A JP 13356785A JP S61290343 A JPS61290343 A JP S61290343A
- Authority
- JP
- Japan
- Prior art keywords
- moisture
- cover
- moisture meter
- heat insulating
- insulating cover
- 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
- 238000000034 method Methods 0.000 title claims description 8
- 238000005259 measurement Methods 0.000 claims abstract description 30
- 230000003287 optical effect Effects 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 13
- 239000008187 granular material Substances 0.000 claims description 12
- 238000005245 sintering Methods 0.000 abstract description 13
- 238000009833 condensation Methods 0.000 abstract description 7
- 230000005494 condensation Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 abstract description 5
- 230000008595 infiltration Effects 0.000 abstract 2
- 238000001764 infiltration Methods 0.000 abstract 2
- 230000005764 inhibitory process Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 31
- 238000010926 purge Methods 0.000 description 8
- 238000005469 granulation Methods 0.000 description 6
- 230000003179 granulation Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3554—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for determining moisture content
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (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)
- Optical Measuring Cells (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は搬送ライン上の粉・粒状物中に含有される水分
を光学水分針、例えば赤外線水分針にて高精度に測定す
る方法及び装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method and apparatus for highly accurately measuring moisture contained in powder and granules on a conveyance line using an optical moisture needle, such as an infrared moisture needle. Regarding.
近年では、粉・粒状物中に含まれる水分を測定する装置
としては赤外線水分計が使用されつつある。In recent years, infrared moisture meters have come into use as devices for measuring moisture contained in powders and granules.
赤外線水分計の使用例としては、例えば鉄鋼業において
焼結工場、コークス工場等で原料受は入れライン或いは
混合原料搬送ベルトライン等の搬送ラインに第４図に示
す如く掻板１３及び赤外線水分計１１を上流側よりこの
順に設置し、ベルトコンベア３上を搬送されている外気
温度よりも高温の原料３４中に含有された水分を赤外線
水分計１１により測定し、その測定値に基づき例えば赤
外線水分計１１よりも下流側に設けた造粒ミキサ（図示
せず）の注水量を制御するのに利用する場合がある。An example of the use of an infrared moisture meter is, for example, in a sintering factory or a coke factory in the steel industry, where a scraper plate 13 and an infrared moisture meter are installed on a conveyor line such as a raw material receiving line or a mixed raw material conveyor belt line, as shown in Fig. 4. 11 are installed in this order from the upstream side, and the infrared moisture meter 11 measures the moisture contained in the raw material 34, which is at a higher temperature than the outside air temperature and is being conveyed on the belt conveyor 3. Based on the measured value, for example, the infrared moisture content is measured. It may be used to control the amount of water poured into a granulation mixer (not shown) provided downstream of the total 11.
この赤外線水分計は、その検出部（内蔵している）から
水に吸収され易い波長の水分検出用赤外線と、吸収され
にくい波長の基準用赤外線とを測定対象の原料３４に照
射してその反射光強度を検出し、上記各波長毎の反射光
強度の比より原料中の水分を測定するものである。なお
、前記掻板１３は、原料層表面の凹凸を小さくして、赤
外線の反射強度が受ける影響を抑制して測定精度を向上
させるべく設けている。This infrared moisture meter irradiates the raw material 34 to be measured with infrared rays for moisture detection with a wavelength that is easily absorbed by water and reference infrared rays with a wavelength that is difficult to absorb from its detection unit (built-in), and reflects the light. The light intensity is detected and the water content in the raw material is measured from the ratio of the reflected light intensity for each wavelength. The scratching plate 13 is provided to reduce the unevenness on the surface of the raw material layer, thereby suppressing the influence on the reflection intensity of infrared rays and improving measurement accuracy.
〔発明が解決しようとする問題点〕
ところで、搬送中の原料中に含まれる水分は、その原料
温度における蒸気圧を有しているため、常にその一部が
大気中へ蒸発し、測定位置近傍の外気によって冷却され
る。水の蒸気圧曲線を第５図に示すが、原料から蒸発し
た水分のうち原料温度に対応する蒸気圧ＰＨ２と外気温
度に対応する蒸気圧ＰＨ，との差に相当する水分は、水
蒸気として凝縮し、測定雰囲気に浮遊する。凝縮蒸気量
は当然のことながら原料温度が高い程、また外気温度と
の差が大きい程、多くなる。このように凝縮蒸気量が多
くなる場合はその凝縮蒸気により、また赤外線水分計の
レンズ及びそれ以外の部分に生じる結露により、水分測
定が困難となる。[Problems to be Solved by the Invention] By the way, since the moisture contained in the raw material being transported has a vapor pressure at the temperature of the raw material, a portion of it always evaporates into the atmosphere and does not reach the vicinity of the measurement position. cooled by outside air. The vapor pressure curve of water is shown in Figure 5. Of the water evaporated from the raw material, the water equivalent to the difference between the vapor pressure PH2 corresponding to the raw material temperature and the vapor pressure PH corresponding to the outside air temperature is condensed as water vapor. and float in the measurement atmosphere. Naturally, the amount of condensed steam increases as the raw material temperature increases and as the difference from the outside temperature increases. When the amount of condensed steam increases in this way, moisture measurement becomes difficult due to the condensed steam and dew condensation formed on the lens and other parts of the infrared moisture meter.
また赤外線水分計の測定領域内には水分計検出部直下の
原料から発生する水蒸気以外に上述の浮遊する水蒸気等
が存在する。したがって冬期成いは夜間等の外気温度が
低い場合には第６図に示す如く赤外線水分計からの赤外
線がその水蒸気に吸収されて水分測定値（実線）が真の
値（一点鎖線）よりも異常に高くなり、水分を正確に測
定できないことがあった。In addition to the water vapor generated from the raw material directly below the moisture meter detection section, the above-mentioned floating water vapor and the like are present within the measurement area of the infrared moisture meter. Therefore, in winter, when the outside temperature is low, such as at night, the infrared rays from the infrared moisture meter are absorbed by the water vapor, as shown in Figure 6, and the measured moisture value (solid line) is lower than the true value (dotted chain line). In some cases, the moisture content could become abnormally high, making it impossible to measure moisture accurately.
このため、赤外線水分計の測定領域内だけでも浮遊する
水蒸気を排除すべく赤外線水分計のフード１２ （第４
図参照）内へパージ用エアを供給して原料へ向けてエア
を噴出させ、エアパージする方法が試みられている。Therefore, in order to eliminate floating water vapor even within the measurement area of the infrared moisture meter, the hood 12 (fourth
Attempts have been made to purify the raw material by supplying purge air into the raw material (see figure) and jetting the air toward the raw material.
しかしながら、前記掻板にて掻取った直後では原料から
一層激しく水分が蒸発するため、上記方法による場合で
もその蒸発により生じた水蒸気を十分に排除できず、正
確な測定を行い得なかった。However, immediately after scraping with the scraping plate, water evaporates from the raw material even more intensely, so even with the above method, the water vapor generated by the evaporation could not be sufficiently removed, making it impossible to perform accurate measurements.
Ｃ問題点を解決するための手段〕
本発明は係る事情に鑑みてなされたものであり、赤外線
又は他の周波数帯域の光線を用いる光学水分計の測定位
置の周辺雰囲気の温度をその雰囲気における露点よりも
高めるべく、前記雰囲気を取囲むように保温カバーを設
けて保温することにより、粉・粒状物中から蒸発する水
分の凝縮を抑制し、また保温カバー内へ例えば乾燥した
エア等を供給することにより、保温カバー内の雰囲気中
の水分を追放して粉・粒状物中の水分を精度よく測定す
る方法及び装置を提供することを目的とする。Means for Solving Problem C] The present invention has been made in view of the above circumstances, and it calculates the temperature of the atmosphere around the measurement position of an optical moisture meter that uses infrared rays or other frequency band light to determine the dew point of that atmosphere. In order to further increase the temperature, a heat insulating cover is provided to surround the atmosphere to keep it warm, thereby suppressing the condensation of moisture that evaporates from the powder and granules, and supplying, for example, dry air into the heat insulating cover. Therefore, it is an object of the present invention to provide a method and apparatus for accurately measuring moisture in powder and granular materials by expelling moisture in the atmosphere inside a heat-insulating cover.
本発明に係る水分測定方法は、搬送されている粉・粒状
物中に含まれる水分を、それに臨ませて設けた光学水分
計にて測定する方法において、前記光学水分計の受光部
及びその測定視野を囲むように保温カバーを設け、該保
温カバーにて覆われた空間内での水分の凝縮を防止する
ことを特徴とする。The moisture measuring method according to the present invention is a method of measuring moisture contained in powder or granular material being conveyed using an optical moisture meter installed facing the powder or granules, the light receiving part of the optical moisture meter and its measurement. It is characterized in that a heat insulating cover is provided to surround the field of view, and moisture condensation is prevented within the space covered by the heat insulating cover.
以下本発明を図面に基づき具体的に説明する。 The present invention will be specifically explained below based on the drawings.
第１図は本発明を焼結機４０＝段の混合造粒設備ｌに適
用し、原料中の水分を測定して管理する場合の最良の実
ｈＩＩ！例を示す模式図であり、図中４はベルトコンベ
ア３上を白抜矢符方向へ搬送されている粉・粒状の焼結
原料を示す。FIG. 1 shows the best practical example of applying the present invention to a sintering machine 40=stage mixing and granulating equipment 1, and measuring and controlling the water content in the raw materials! This is a schematic diagram showing an example, and 4 in the figure shows powder/granular sintering raw material being conveyed on the belt conveyor 3 in the direction of the white arrow.
焼結原料４はベルトコンベア３の上流側に設けられた原
料層２に貯留されていた原料が所定量切出されたもので
あり、第１造粒ミキサ５にて注入されたのち本発明に係
る水分測定袋２１０により水分が測定され、その測定値
に基づき第２造粒ミキサ７にて注水量が制御されて所期
の水分を含んだのち焼結機４０へ送られる。The sintering raw material 4 is obtained by cutting out a predetermined amount of the raw material stored in the raw material layer 2 provided upstream of the belt conveyor 3, and is injected by the first granulation mixer 5 and then processed into the present invention. Moisture is measured by the moisture measuring bag 210, and based on the measured value, the amount of water injected is controlled by the second granulation mixer 7, and after containing the desired moisture, it is sent to the sintering machine 40.
上記水分測定装置１０は、第２図に示す如く焼結原料４
の上方に、赤外線照射方向を下に向けて赤外線水分計１
１が設置されており、赤外線水分計１１の上流側には掻
板１３がその下端の高さを調整して設けられている。焼
結原料４の搬送域における掻板１３の下流側から赤外線
水分計１１の下流側に亘る＠域には、赤外線水分計１１
の下部を構成する円筒状のフード１２の先端を軸心を上
下方向にしてその内に挿入させである無底の矩形箱状の
保温カバー１６が設けられている。保温カバー１６の赤
外線水分針１１よりも上流側には、保温カバー１６の上
面一部を切欠いてヒータ１７がフランジ付円筒１４を介
して取付けられており、また保温カバー１６のヒータ１
７の下流側には先端を保温カバー１６内に挿入して温度
計１８が配設されて（、ｓる。The moisture measuring device 10 includes a sintered raw material 4 as shown in FIG.
Infrared moisture meter 1 with the infrared rays irradiation direction facing downwards.
1 is installed, and a scraper plate 13 is provided upstream of the infrared moisture meter 11 with the height of its lower end adjusted. An infrared moisture meter 11 is provided in an area extending from the downstream side of the scraping plate 13 to the downstream side of the infrared moisture meter 11 in the conveyance area of the sintered raw material 4.
A heat insulating cover 16 in the shape of a bottomless rectangular box is provided, which is inserted into the cylindrical hood 12 constituting the lower part of the hood 12 with the tip of the hood 12 in the vertical direction with respect to the axis. A heater 17 is installed on the upstream side of the infrared moisture needle 11 of the heat insulating cover 16 by cutting out a part of the upper surface of the heat insulating cover 16 via a flanged cylinder 14.
A thermometer 18 is disposed on the downstream side of the thermometer 7 with its tip inserted into the heat insulating cover 16.
上記保温カバー１６は下端が、掻板１３にて掻取られた
焼結原料４の上面よりも高レベル位置となっており、保
温カバー１６の下端部には保温カバー１６とそれに対向
する焼結原料４部分との間の隙間を塞ぐべくシール用シ
ー）１５が取付けられている。The lower end of the heat retaining cover 16 is located at a higher level than the upper surface of the sintered raw material 4 scraped by the scraping plate 13, and the heat retaining cover 16 and the sintered material facing it are located at the lower end of the heat retaining cover 16. A sealing sheath 15 is attached to close the gap between the raw material 4 and the raw material 4.
これにより保温カバー１６内へその外側に存在する水蒸
気の浸入が防止される。This prevents water vapor present on the outside from entering into the heat retaining cover 16.
前記ヒータ１７には蒸気用配管２０ａ及びパージ用エア
配管１７ａが連結され、配管２０ａ、 １７ａを介して
夫々蒸気、パージ用エフ′が供給されるようになってお
り、そのエアはヒータ１７内に設けられた蒸気通流用配
管（図示せず）にて加熱されたのち管１４を通って保温
カバー１６内に送られ、保温カバー１６内の雰囲気を第
５図に示す原料温度と同程度或いは少し高目の温度に維
持する。これにより焼結原料４内から蒸発した水分の水
蒸気化は抑制される。A steam pipe 20a and a purge air pipe 17a are connected to the heater 17, and steam and purge F' are supplied through the pipes 20a and 17a, respectively, and the air is fed into the heater 17. After being heated in the provided steam flow piping (not shown), the steam is sent through the pipe 14 into the heat insulation cover 16, and the atmosphere inside the heat insulation cover 16 is maintained at a temperature similar to or slightly lower than that of the raw material shown in FIG. Maintain a high temperature. This suppresses water vaporization of water evaporated from the sintering raw material 4.
ｉｉｊ記温度計１８は保温カバー１６内の雰囲気温度を
測定し、その測定信号をバルブ開度制御器１９へ与える
。バルブ開度制御器１９は入力信号に基づき蒸気用配管
２０ａの中途に設けた蒸気供給量調整用バルブ２０の開
度を制御してヒータ１７への蒸気の供給量を調整し、パ
ージ用エアの加熱温度を調節する。iii) The thermometer 18 measures the ambient temperature inside the heat insulating cover 16 and provides the measurement signal to the valve opening controller 19. The valve opening degree controller 19 controls the opening degree of a steam supply amount adjustment valve 20 provided in the middle of the steam pipe 20a based on the input signal, adjusts the amount of steam supplied to the heater 17, and controls the amount of purge air. Adjust heating temperature.
これは、パージ用エアが加熱されすぎると焼結原料４表
層の水分が蒸発して焼結原料４の水分が少なくなり、測
定値が真の水分値よりも低（なることを防止するためで
ある。This is to prevent the measured value from becoming lower than the true moisture value because if the purge air is heated too much, the moisture on the surface of the sintering raw material 4 will evaporate and the moisture content of the sintering raw material 4 will decrease. be.
保温カバー１６の本体には蒸気配管１６ａが内設されて
おり、蒸気配管１６ａにはヒータ１７内の蒸気の一部が
保温カバー保温用配管１４ａを介して供給され、保温カ
バー１６はそれ自体が保温される。A steam pipe 16a is installed inside the main body of the heat retaining cover 16, and a part of the steam in the heater 17 is supplied to the steam pipe 16a via the heat retaining cover heat retaining pipe 14a, and the heat retaining cover 16 itself is It is kept warm.
前記フード１２には周壁にエア導入管２１が取付けられ
ており、エア導入管２１にはヒータ１７内の加熱された
エアが導入され、導入されたエアはフード１２内及びフ
ード１２の下刃を燃焼原料４の水分より不可避的に生じ
る水蒸気をパージする。An air introduction pipe 21 is attached to the peripheral wall of the hood 12. Heated air in the heater 17 is introduced into the air introduction pipe 21, and the introduced air flows inside the hood 12 and the lower blade of the hood 12. The steam inevitably generated from the moisture in the combustion raw material 4 is purged.
このように本発明装置は構成されているので、赤外線水
分計１１は焼結原料４の水分から不可避的に生じた水蒸
気及び保温カバー１６外側の水蒸気の影響を受けないた
め、精度よく測定できる。Since the apparatus of the present invention is configured in this way, the infrared moisture meter 11 is not affected by the water vapor inevitably generated from the moisture in the sintering raw material 4 and the water vapor on the outside of the heat-insulating cover 16, so that the measurement can be performed with high accuracy.
そして、赤外線水分計１１の出力は変換器３０へ与えら
れてここで電気信号に変換され、変換された信号は水分
制御器３１へ送られる。水分制御器３１は入力信号に基
づき第■造粒ミキサ５への水供給量の調整を司るバルブ
６及び第２造粒ミキサ７への水供給量の調整を司るバル
ブ８の開度を調節する。The output of the infrared moisture meter 11 is then applied to a converter 30 where it is converted into an electrical signal, and the converted signal is sent to a moisture controller 31. The moisture controller 31 adjusts the opening degrees of the valve 6 that controls the amount of water supplied to the No. 1 granulation mixer 5 and the valve 8 that controls the amount of water supplied to the second granulation mixer 7 based on the input signal. .
これにより焼結原料４は所期の水分となって焼結機４０
の入側ホフパ４１へ送られる。As a result, the sintering raw material 4 becomes the desired moisture content, and the sintering machine 40
It is sent to the input side hopper 41.
第３図は本発明装置にて焼結原料４内の水分を測定した
ときの赤外線水分計１１の出力を示すグラフであり、横
軸に時間をとり、また縦軸に水分計出力をとって示して
いる。なお、測定条件は水分検出用赤外線の波長が１．
９μｍ、基準用赤外線の波長が１．７μｍ及び２．１μ
ｍである。この図より理解される如（本発明による場合
は、水蒸気による影ツがないため測定精度が高い。FIG. 3 is a graph showing the output of the infrared moisture meter 11 when the moisture in the sintered raw material 4 is measured using the apparatus of the present invention, with time plotted on the horizontal axis and moisture meter output plotted on the vertical axis. It shows. The measurement conditions are that the wavelength of the infrared ray for moisture detection is 1.
9μm, reference infrared wavelength is 1.7μm and 2.1μm
It is m. As can be understood from this figure (in the case of the present invention, there is no influence due to water vapor, so the measurement accuracy is high).
また本発明はバルブ２０の開度を制御してパージ用エア
の温度を當に一定に調節できるので、−年を通じて測定
雰囲気が一定となり、季節によって異なる外気温度の影
グを受けないため、更に測定精度の向上を図り得る。Furthermore, the present invention allows the temperature of the purge air to be adjusted to a constant level by controlling the opening degree of the valve 20, so that the measurement atmosphere remains constant throughout the year and is not affected by the outside temperature that varies depending on the season. Measurement accuracy can be improved.
なお、上記実施例ではパージ用エアを蒸気にて加熱して
いるが、本発明はこれに限らずパージ用エアを電熱ヒー
タ等により加熱する方式によっても実施できる。また赤
外線水分計の測定位置近傍の雰囲気温度が比較的高く、
加熱装置を必要としない環境下での測定の場合には、本
発明装置はその加熱装置が不用である。In the above embodiment, the purge air is heated with steam, but the present invention is not limited to this, and can also be implemented by heating the purge air with an electric heater or the like. In addition, the ambient temperature near the measurement position of the infrared moisture meter is relatively high.
In the case of measurement in an environment that does not require a heating device, the device of the present invention does not require the heating device.
また上記実施例では温度計１８で保温カバー内の温度を
測定し、バルブ２０の開度を自動調節して蒸気の供給量
を調整しているが、本発明は必ずしも温度計を必要とす
るものではなく、発生蒸気が凝縮しない温度が概略確保
されれば精密な温度コントロールは不用である。Further, in the above embodiment, the temperature inside the heat insulation cover is measured with the thermometer 18, and the opening degree of the valve 20 is automatically adjusted to adjust the amount of steam supplied, but the present invention does not necessarily require a thermometer. Rather, if the temperature at which the generated steam does not condense is approximately ensured, precise temperature control is unnecessary.
そして、また上記実ｈｒ＝例では保温カバー１６に保温
用配管１６ａを内設して、保温カバー自体を保温してい
るが、本発明は測定環境によっては保温カバーを保温せ
ずに、又は断熱材製の保温カバーを使用することによっ
ても実１％できることは勿論である。In the actual hr=example above, the heat retaining pipe 16a is installed inside the heat retaining cover 16 to keep the heat retaining cover itself warm. Of course, it is possible to achieve a reduction of 1% by using a heat insulating cover made of wood.
更に、上記実施例では赤外線水分針の上、下流側の比較
的広い領域を保温カバー１６にて保温しているが、本発
明はこれに限らず赤外線水分針からの赤外線の光路の種
周辺を保温するような極めて小型の保温カバーを設ける
ようにしても実施できるのは勿論である。Furthermore, in the above embodiment, a relatively wide area above and downstream of the infrared moisture needle is kept warm by the heat insulating cover 16, but the present invention is not limited to this. Of course, this can also be implemented by providing an extremely small heat-retaining cover that retains heat.
そして、更に本発明は赤外線水分計に限らず他の周波数
帯域の光線を用いる光学水分計により水分を測定する場
合にも適用できるのは勿論である。Furthermore, the present invention is of course applicable not only to infrared moisture meters but also to cases where moisture is measured by optical moisture meters that use light in other frequency bands.
尚、本発明は上述の実施例による焼結工場での混合原料
注水制御系での通用以外に光学水分計による搬送ライン
上のあらゆる原材料、成品の水分測定に適用できること
はいうまでもない。It goes without saying that the present invention is applicable not only to the water injection control system for mixed raw materials in a sintering factory according to the above-described embodiment, but also to the measurement of moisture content of all kinds of raw materials and finished products on a conveyance line using an optical moisture meter.
以上詳述した如く本発明は光学水分針の測定位置周辺の
雰囲気を保温カバー等にて保温するので、測定対象物か
ら蒸発する水分の凝縮による水蒸気化を抑制でき、更に
、測定領域内への外からの水蒸気の侵入を抑制できるの
で、測定に支障となる水蒸気による光学水分計からの光
線の吸収が極めて少なく、このため高精度の水分測定が
可使となる等優れた効果を奏する。As described in detail above, the present invention insulates the atmosphere around the measurement position of the optical moisture needle with a heat insulating cover, etc., so that it is possible to suppress water vaporization due to condensation of water evaporating from the measurement object, and furthermore, it is possible to suppress water vaporization due to condensation of water that evaporates from the measurement object. Since the intrusion of water vapor from the outside can be suppressed, there is extremely little absorption of light from the optical moisture meter by water vapor, which would interfere with measurement, and this provides excellent effects such as enabling highly accurate moisture measurement.
第１図は本発明を混合造粒設備に適用した場合の実ｈ１
！１状態を示す模式図、第２図は本発明装置の実施例を
示す模式的断面図、第３図は本発明による測定結果例を
示すグラフ、第４図は従来技術の内容説明図、第５図は
外気温度、原料温度及び水の蒸気圧曲線の関係を示した
グラフ、第６図は従来技術による測定結果例を示すグラ
フである。Figure 1 shows the actual h1 when the present invention is applied to mixing granulation equipment.
! FIG. 2 is a schematic cross-sectional view showing an embodiment of the apparatus of the present invention, FIG. 3 is a graph showing an example of measurement results according to the present invention, FIG. 4 is an explanatory diagram of the contents of the prior art, FIG. 5 is a graph showing the relationship between outside air temperature, raw material temperature, and water vapor pressure curve, and FIG. 6 is a graph showing an example of measurement results according to the prior art.
Claims (1)
れに臨ませて設けた光学水分計にて測定する方法におい
て、 前記光学水分計の受光部及びその測定視野 を囲むように保温カバーを設け、該保温カバーにて覆わ
れた空間内での水分の凝縮を防止することを特徴とする
水分測定方法。 ２、搬送されている粉・粒状物中に含まれる水分を光学
的に測定する装置において、 前記粉・粒状物に臨ませて設けた光学水分 計と、 該光学水分計の受光部及び測定視野を囲む ように設けた保温カバーと を具備すことを特徴とする水分測定装置。 ３、搬送されている粉・粒状物中に含まれる水分を光学
的に測定する装置において、 前記粉・粒状物に臨ませて設けた光学水分 計と、 該光学水分計の受光部及び測定視野を囲む ように設けた保温カバーと、 該保温カバー内へ乾燥気体を供給する供給 器と を具備することを特徴とする水分測定装置。[Scope of Claims] 1. A method for measuring moisture contained in a powder or granular material being conveyed using an optical moisture meter installed facing the powder or granules, comprising: a light-receiving section of the optical moisture meter and its measurement field of view; 1. A moisture measuring method comprising: providing a heat insulating cover so as to surround the heat insulating cover, and preventing moisture from condensing in a space covered by the heat insulating cover. 2. In a device that optically measures the moisture contained in powders and granules being transported, an optical moisture meter installed facing the powder and granules, and a light receiving part and a measurement field of the optical moisture meter. A moisture measuring device characterized by comprising: a heat insulating cover provided to surround the moisture measuring device. 3. A device for optically measuring the moisture contained in powders and granules being transported, including an optical moisture meter installed facing the powder and granules, and a light-receiving section and measurement field of the optical moisture meter. A moisture measuring device comprising: a heat insulating cover provided to surround the heat insulating cover; and a supply device for supplying dry gas into the heat insulating cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60133567A JPS61290343A (en) | 1985-06-18 | 1985-06-18 | Method and apparatus for measuring moisture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60133567A JPS61290343A (en) | 1985-06-18 | 1985-06-18 | Method and apparatus for measuring moisture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61290343A true JPS61290343A (en) | 1986-12-20 |
Family
ID=15107823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60133567A Pending JPS61290343A (en) | 1985-06-18 | 1985-06-18 | Method and apparatus for measuring moisture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61290343A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012164440A (en) * | 2011-02-03 | 2012-08-30 | Furukawa Battery Co Ltd:The | Method of manufacturing electrode plate for lead storage battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5529087U (en) * | 1978-08-17 | 1980-02-25 | ||
| JPS578555B1 (en) * | 1970-05-11 | 1982-02-17 |
-
1985
- 1985-06-18 JP JP60133567A patent/JPS61290343A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS578555B1 (en) * | 1970-05-11 | 1982-02-17 | ||
| JPS5529087U (en) * | 1978-08-17 | 1980-02-25 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012164440A (en) * | 2011-02-03 | 2012-08-30 | Furukawa Battery Co Ltd:The | Method of manufacturing electrode plate for lead storage battery |
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