JP2814022B2 - Moisture control device - Google Patents
Moisture control deviceInfo
- Publication number
- JP2814022B2 JP2814022B2 JP3110879A JP11087991A JP2814022B2 JP 2814022 B2 JP2814022 B2 JP 2814022B2 JP 3110879 A JP3110879 A JP 3110879A JP 11087991 A JP11087991 A JP 11087991A JP 2814022 B2 JP2814022 B2 JP 2814022B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- temperature
- steam
- moisture
- detecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Drying Of Solid Materials (AREA)
- Paper (AREA)
- Feedback Control In General (AREA)
- Control Of Non-Electrical Variables (AREA)
- Control Of Fluid Pressure (AREA)
- Control Of Temperature (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、糸や紙・パルプや各種
食品等の乾燥工程における保有水分の制御装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for controlling water content in a drying process of yarn, paper, pulp, various foods and the like.
【0002】糸や紙・パルプの乾燥工程においては、所
定の品質を維持し且つ生産性を向上するために、糸や紙
の保有水分が所定の範囲内となるようにコントロ―ルさ
れている。また、食品等の乾燥工程においても風味を損
わず乾燥させるために保有水分のコントロ―ルが行なわ
れている。水分のコントロ―ルは、品質のより一層の向
上と生産性の更なる向上のためにその精度管理が厳格に
実施されるようになってきた。In the drying process of yarn, paper and pulp, in order to maintain predetermined quality and improve productivity, the yarn and paper are controlled so that the water content of the yarn or paper is within a predetermined range. . Also, in the drying process of foods and the like, control of retained moisture is performed in order to dry the food without losing its flavor. Moisture control has been strictly controlled for its quality in order to further improve quality and productivity.
【0003】[0003]
【従来技術】従来の水分制御装置としては、被加熱物の
水分を検出する水分センサ―と、この水分センサ―から
の信号に基づいて加熱用蒸気圧力を調整する圧力調整弁
の弁開度を調整する方法が一般的に行なわれていた。2. Description of the Related Art As a conventional moisture control device, a moisture sensor for detecting moisture in an object to be heated and a valve opening of a pressure regulating valve for adjusting a steam pressure for heating based on a signal from the moisture sensor are known. Adjustment methods were commonly used.
【0004】[0004]
【本発明が解決しようとする課題】従来のものでは高精
度に被加熱物の保有水分を制御できない問題があった。
すなわち、被加熱物の水分のみを検出してフィ―ドバッ
ク制御を行なうために、オ―バ―シュ―トを起したり、
水分量がハンチング状態となってしまい、高精度に制御
できないためである。The conventional apparatus has a problem that the water content of the object to be heated cannot be controlled with high accuracy.
That is, in order to perform feedback control by detecting only the water content of the object to be heated, an overshoot occurs,
This is because the water content is in a hunting state and cannot be controlled with high accuracy.
【0005】従って本発明の技術的課題は、被加熱物の
保有水分を、オ―バ―シュ―トやハンチング状態となら
ないように、高精度に制御することである。Accordingly, it is a technical object of the present invention to control the water content of an object to be heated with high accuracy so as not to be in an overshort or hunting state.
【0006】[0006]
【課題を解決するための手段】本発明の水分制御装置の
構成は次の通りである。圧力調整弁を介して蒸気供給管
を熱交換器に接続し、該熱交換器で被加熱物を加熱する
ことにより被加熱物の水分を制御するものにおいて、被
加熱物の加熱工程中または加熱後の水分を検出するため
の水分センサーと温度を検出するための温度センサー
と、熱交換器の入口側の蒸気圧力を検出するための圧力
センサーとを具備し、上記水分や温度や圧力センサーか
らの信号に基づいて圧力調整弁の弁開度を制御する制御
部を有すると共に、熱交換器内を真空ポンプと接続した
ものである。The constitution of the moisture control device of the present invention is as follows. A method in which a steam supply pipe is connected to a heat exchanger via a pressure regulating valve, and the heat of the object is controlled by heating the object with the heat exchanger. A moisture sensor for detecting the moisture after and a temperature sensor for detecting the temperature, and a pressure sensor for detecting the steam pressure on the inlet side of the heat exchanger, comprising the moisture, temperature and pressure sensors. And a control unit for controlling the opening degree of the pressure regulating valve based on the signal of (1), and the inside of the heat exchanger is connected to a vacuum pump.
【0007】[0007]
【作用】被加熱物の水分のみならず温度や蒸気圧力をも
検出し、これらの検出結果に基づいて圧力調整弁を制御
することにより、被加熱物の保有水分量を高精度に制御
することができる。即ち、被加熱物の水分量は、被加熱
物の温度状態や、加熱用の蒸気圧力即ち蒸気温度によっ
て変化する。従って、熱交換器の入口側の蒸気圧力を圧
力センサーで検出して蒸気圧力即ち蒸気温度を事前に検
出すると共に、加熱工程中または加熱後の被加熱物の水
分と温度を検出して圧力調整弁の弁開度を制御すること
により、水分量がオーバーシュートしたりハンチング状
態となることがない。[Function] To control the water content of the object to be heated with high accuracy by detecting not only the moisture of the object to be heated but also the temperature and the steam pressure and controlling the pressure regulating valve based on the detection results. Can be. That is, the water content of the object to be heated changes depending on the temperature state of the object to be heated and the steam pressure for heating, that is, the steam temperature. Therefore, the steam pressure on the inlet side of the heat exchanger is reduced.
The steam pressure, that is, the steam temperature is detected in advance by detecting with a force sensor.
Of water to be heated during or after the heating process
By controlling the degree of opening of the pressure regulating valve by detecting the minute and the temperature , the water content does not overshoot or enter a hunting state.
【0008】[0008]
【実施例】図示の実施例を詳細に説明する。本実施例に
おいては、糸を乾燥して保有水分量を制御する例を示
す。本発明の水分制御装置は、加熱用の蒸気を供給する
蒸気供給管1と、蒸気の供給圧力を制御する圧力調整弁
2と、被加熱物としての糸3を加熱するための加熱ロ―
ル4と、加熱ロ―ル4内の凝縮したドレンを排出するた
めのスチ―ムトラップ5と、加熱ロ―ル4内を減圧状態
にする真空ポンプ29とから成る。BRIEF DESCRIPTION OF THE DRAWINGS FIG. In this embodiment, an example in which the yarn is dried to control the amount of retained water will be described. The moisture control device according to the present invention includes a steam supply pipe 1 for supplying steam for heating, a pressure regulating valve 2 for controlling a supply pressure of steam, and a heating roll for heating a yarn 3 as an object to be heated.
The heating roll 4 includes a steam trap 5 for discharging condensed drain in the heating roll 4 and a vacuum pump 29 for reducing the pressure in the heating roll 4.
【0009】圧力調整弁2は、蒸気供給管1中に発生し
たドレンを系外に排除するためのスチ―ムトラップ6を
内蔵すると共に、調整圧力値を外部から設定するための
電動アクチュエ―タ7を有する。The pressure regulating valve 2 has a built-in steam trap 6 for removing the drain generated in the steam supply pipe 1 to the outside of the system, and an electric actuator 7 for externally setting the regulated pressure value. Having.
【0010】加熱ロ―ル4は、円筒状の回転式ドライヤ
―で内部に蒸気を供給し、外部に沿う糸3を回転しなが
ら乾燥する。加熱ロ―ル4の入口側に蒸気圧力を検出す
るための圧力センサ―8を設ける。また、糸3の上方に
は糸3の温度を検出するための温度センサ―9を設ける
と共に、糸3の保有水分を検出する水分センサ―10を
設ける。水分センサ―10としては、水分量に応じて赤
外線の吸収量が変化する赤外線式水分計を用いることが
望ましい。それぞれのセンサ―8,9,10及び圧力調
整弁2の電動アクチュエ―タ7は信号線により制御部1
2と接続する。The heating roll 4 supplies steam to the inside with a cylindrical rotary drier and dries while rotating the yarn 3 along the outside. A pressure sensor 8 for detecting a steam pressure is provided at the inlet side of the heating roll 4. Further, a temperature sensor 9 for detecting the temperature of the yarn 3 is provided above the yarn 3 and a moisture sensor 10 for detecting the water content of the yarn 3 is provided. As the moisture sensor 10, it is desirable to use an infrared moisture meter whose infrared absorption changes according to the amount of moisture. Each of the sensors 8, 9, 10 and the electric actuator 7 of the pressure regulating valve 2 are connected to a control unit 1 by a signal line.
Connect to 2.
【0011】加熱ロ―ル4内とスチ―ムトラップ5を管
13で接続する。スチ―ムトラップ5は、図示はしてい
ないがトラップの弁口をバイパスするバイパス路を内蔵
すると共に、このバイパス路を開閉するための電動アク
チュエ―タ14を有する。スチ―ムトラップ5の排出管
15は三方切替弁16を介して真空ポンプ29又は大気
と連通する。The inside of the heating roll 4 and the steam trap 5 are connected by a pipe 13. Although not shown, the steam trap 5 has a built-in bypass which bypasses the valve port of the trap, and has an electric actuator 14 for opening and closing the bypass. The discharge pipe 15 of the steam trap 5 communicates with a vacuum pump 29 or the atmosphere via a three-way switching valve 16.
【0012】真空ポンプ29は、エゼクタ―式の真空ポ
ンプであり、給液タンク30と渦巻きポンプ31の吸込
口を連結し、渦巻きポンプ31の吐出口とエゼクタ―3
2を連結し、エゼクタ―32と給液タンク30とを連結
したものである。エゼクタ―32を通過する高速流体に
より吸引力が発生し、加熱ロ―ル4内で発生したドレン
を滞留することなく吸引する。また、エゼクタ―32で
発生する吸引力は、エゼクタ―32を通過する流体の温
度における飽和圧力と等しくなるために、飽和圧力すな
わち吸引力を、より精度良く保つために、給液タンク3
0内の液温を制御する温度制御弁33を介して冷却水供
給管35から冷却水を注入する。給液タンク30内の液
温は温度センサ―34で検出して制御部12へ入力する
と共に、温度制御弁33を制御する。真空ポンプ29を
循環するドレンと冷却水の混合流体の過剰分は水位セン
サ―38,39で検出され、ドレン排出弁51を介し
て、ドレン排出路52から系外に排出される。それぞれ
のセンサ―や弁・トラップの電動アクチュエ―タは制御
部12と接続し、集中制御ができるようにする。The vacuum pump 29 is an ejector-type vacuum pump, and connects the liquid supply tank 30 and the suction port of the spiral pump 31 to connect the discharge port of the spiral pump 31 to the ejector 3.
2 is connected, and the ejector 32 and the liquid supply tank 30 are connected. A suction force is generated by the high-speed fluid passing through the ejector 32, and the drain generated in the heating roll 4 is sucked without stagnation. Further, the suction force generated by the ejector 32 becomes equal to the saturation pressure at the temperature of the fluid passing through the ejector 32, so that the saturation pressure, that is, the suction force, is maintained more precisely.
Cooling water is injected from a cooling water supply pipe 35 via a temperature control valve 33 for controlling the temperature of the liquid within 0. The temperature of the liquid in the liquid supply tank 30 is detected by a temperature sensor 34 and input to the control unit 12, and the temperature control valve 33 is controlled. An excess amount of the mixed fluid of the drain and the cooling water circulating in the vacuum pump 29 is detected by water level sensors 38 and 39, and is discharged from the system through a drain discharge passage 52 through a drain discharge valve 51. The electric actuators of the respective sensors and valves / traps are connected to the control unit 12 so that centralized control can be performed.
【0013】糸3の保有水分量を制御する場合、100
℃以上の比較的高温で加熱する必要があるならば三方切
替弁16を操作して排出管15と大気を連通する。10
0℃以上の蒸気であれば大気圧以上の圧力状態であるた
めに、加熱ロール4内で凝縮したドレンは、真空ポンプ
29で吸引する必要もなく、排出管15と三方切替弁1
6を経て大気へ排出される。圧力調整弁2から供給され
る大気圧以上の高温高圧の蒸気は、糸3を加熱し水分量
を制御する。この場合、糸3の水分のみならず温度セン
サー9により温度を、圧力センサー8により蒸気圧力即
ち蒸気温度をも検出し、これら検出信号に応じて制御部
12で圧力調整弁2を制御して、糸3の水分量が所望値
となるように最適な蒸気量を供給することにより、糸3
の水分量を高精度に制御することができる。When controlling the water content of the yarn 3, 100
If heating at a relatively high temperature of not less than ° C. is required, the three-way switching valve 16 is operated to communicate the discharge pipe 15 with the atmosphere. 10
If the temperature is 0 ° C or higher, the pressure is higher than the atmospheric pressure.
The drain condensed in the heating roll 4 is supplied to a vacuum pump
There is no need for suction at 29, the discharge pipe 15 and the three-way switching valve 1
It is discharged to the atmosphere via 6. Supplied from the pressure regulating valve 2
The high-temperature and high-pressure steam having a pressure higher than the atmospheric pressure heats the yarn 3 to control the amount of water. In this case, not only the moisture of the yarn 3 but also the temperature by the temperature sensor 9 and the steam pressure, that is, the steam temperature by the pressure sensor 8, and the control unit 12 controls the pressure regulating valve 2 in accordance with these detection signals, By supplying an optimal steam amount so that the water content of the yarn 3 becomes a desired value, the yarn 3
Can be controlled with high precision.
【0014】図示はしていないが本実施例では加熱ロ―
ル4として回転式ドライヤ―を用いているために加熱ロ
―ル4の回転速度を検出して制御部12に入力すること
により、更に精度を向上させることもできる。Although not shown, in this embodiment, a heating roll is used.
Since a rotary dryer is used as the roll 4, the accuracy can be further improved by detecting the rotation speed of the heating roll 4 and inputting it to the control unit 12.
【0015】また本実施例においては100℃以下の比
較的低温の蒸気でもって糸3の水分量を制御することも
できる。糸の種類によっては100℃以下でしか加熱で
きないものもあるためである。この場合三方切替弁16
を操作して排出管15と真空ポンプ29を連通する。真
空ポンプ29内に給液タンク30の水を循環してエゼク
タ−32に負圧を発生させる。この負圧により加熱ロ―
ル4内も負圧状態となる。圧力調整弁2から低温低圧の
蒸気を供給することにより、加熱ロ―ル4内では100
℃以下の蒸気となり糸3を加熱する。蒸気の圧力と温度
は相関関係があるために、圧力を制御することにより蒸
気温度を制御することができる。即ち、エゼクタ―32
で生じる負圧を制御することにより、加熱ロ―ル4内の
蒸気温度を制御することができる。そしてエゼクタ―3
2で生じる負圧は、エゼクタ―32を通過する流体の温
度を調節することにより制御することができるために、
給液タンク30内の水温を制御することにより、加熱ロ
―ル4内の圧力即ち温度を調整することができる。In the present embodiment, the water content of the yarn 3 can be controlled by relatively low-temperature steam of 100 ° C. or less. This is because some types of yarn can be heated only at 100 ° C. or lower. In this case, the three-way switching valve 16
To communicate the discharge pipe 15 with the vacuum pump 29. The water in the liquid supply tank 30 is circulated in the vacuum pump 29 to generate a negative pressure in the ejector 32. This negative pressure causes heating
The inside of the nozzle 4 is also in a negative pressure state. By supplying low-temperature and low-pressure steam from the pressure regulating valve 2, 100
Then, the yarn 3 is heated to a steam of not more than ℃. Since there is a correlation between the steam pressure and the temperature, the steam temperature can be controlled by controlling the pressure. That is, the ejector 32
By controlling the negative pressure generated in the above, the steam temperature in the heating roll 4 can be controlled. And ejector-3
2 can be controlled by adjusting the temperature of the fluid passing through the ejector 32,
By controlling the temperature of the water in the liquid supply tank 30, the pressure, ie, the temperature, in the heating roll 4 can be adjusted.
【0016】[0016]
【発明の効果】本発明によれば、被加熱物の水分のみな
らず温度や蒸気圧力をも検出して圧力調整弁を制御する
ことにより、被加熱物の水分量がオ―バ―シュ―トした
りハンチング状態となることがなく、高精度に水分量を
制御することができる。According to the present invention, by controlling the pressure regulating valve by detecting not only the moisture of the object to be heated but also the temperature and steam pressure, the amount of moisture in the object to be heated can be reduced. It is possible to control the amount of water with high precision without causing a shunt or a hunting state.
【図1】本発明の水分制御装置の実施例の構成図であ
る。FIG. 1 is a configuration diagram of an embodiment of a moisture control device of the present invention.
1 蒸気供給管 2 圧力調整弁 3 糸 4 加熱ロ―ル 5 スチ―ムトラップ 8 圧力センサ― 9 温度センサ― 10 水分センサ― 12 制御部 16 三方切替弁 29 真空ポンプ 30 給液ポンプ 32 エゼクタ― DESCRIPTION OF SYMBOLS 1 Steam supply pipe 2 Pressure control valve 3 Thread 4 Heating roll 5 Steam trap 8 Pressure sensor 9 Temperature sensor 10 Moisture sensor 12 Control part 16 Three-way switching valve 29 Vacuum pump 30 Feed pump 32 Ejector
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 FI G05D 22/00 G05D 22/00 Z 23/00 23/00 B (58)調査した分野(Int.Cl.6,DB名) G05D 27/00 D21F 5/00 F26B 13/00 G05D 16/20 G05D 22/00 G05D 23/00──────────────────────────────────────────────────の Continuation of front page (51) Int.Cl. 6 identification code FI G05D 22/00 G05D 22/00 Z 23/00 23/00 B (58) Field surveyed (Int.Cl. 6 , DB name) G05D 27/00 D21F 5/00 F26B 13/00 G05D 16/20 G05D 22/00 G05D 23/00
Claims (1)
器に接続し、該熱交換器で被加熱物を加熱することによ
り被加熱物の水分を制御するものにおいて、被加熱物の
加熱工程中または加熱後の水分を検出するための水分セ
ンサーと温度を検出するための温度センサーと、熱交換
器の入口側の蒸気圧力を検出するための圧力センサーと
を具備し、上記水分や温度や圧力センサーからの信号に
基づいて圧力調整弁の弁開度を制御する制御部を有する
と共に、熱交換器内を真空ポンプと接続したことを特徴
とする水分制御装置。An apparatus for controlling a moisture content of an object to be heated by connecting a steam supply pipe to a heat exchanger through a pressure regulating valve and heating the object to be heated by the heat exchanger. A moisture sensor for detecting moisture during or after the heating step, a temperature sensor for detecting temperature, and a pressure sensor for detecting steam pressure at the inlet side of the heat exchanger, A moisture control device comprising: a control unit for controlling a valve opening of a pressure regulating valve based on a signal from a temperature or a pressure sensor; and a heat exchanger connected to a vacuum pump.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3110879A JP2814022B2 (en) | 1991-04-15 | 1991-04-15 | Moisture control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3110879A JP2814022B2 (en) | 1991-04-15 | 1991-04-15 | Moisture control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04316109A JPH04316109A (en) | 1992-11-06 |
JP2814022B2 true JP2814022B2 (en) | 1998-10-22 |
Family
ID=14547013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3110879A Expired - Fee Related JP2814022B2 (en) | 1991-04-15 | 1991-04-15 | Moisture control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2814022B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102561089A (en) * | 2011-12-23 | 2012-07-11 | 广东工业大学 | Automatic control device for hot cylinder heating during production process of corrugated paper and control method |
JP7205222B2 (en) * | 2018-12-27 | 2023-01-17 | 株式会社リコー | Drying equipment and printing equipment |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63135591A (en) * | 1986-11-25 | 1988-06-07 | 日本フエルト株式会社 | Apparatus for measuring moisture content of running object |
JPH01250488A (en) * | 1988-03-30 | 1989-10-05 | Toshiba Corp | Controller for dryer part in paper machine |
-
1991
- 1991-04-15 JP JP3110879A patent/JP2814022B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH04316109A (en) | 1992-11-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0889155B1 (en) | Method for detecting a dysfunction in a laundry dryer and laundry dryer using such a method | |
KR101613965B1 (en) | Control method for exhaust-type dryer | |
KR101646252B1 (en) | Steam laundry dryer control method | |
JP2814022B2 (en) | Moisture control device | |
CN208509983U (en) | Tea water-removing machine | |
US4829680A (en) | Method of heat treatment of a length of material in a tentering machine | |
US4702014A (en) | Method of and an apparatus for drying fibrous material | |
US3676937A (en) | Solvent reclaimer controls | |
DE19613310A1 (en) | Drying washing which is energy saving without damage to washing | |
CN112815655A (en) | Control method of through type dryer | |
JPS60105483A (en) | Tobacco dryer | |
NO831732L (en) | PROCEDURE AND APPARATUS FOR REGULATING HUMIDITY ON OR IN MATERIALS | |
EP0167524A1 (en) | A method for the control of drying of veneer | |
KR101270654B1 (en) | Electric dryer | |
US4489511A (en) | Heated pre-drying cylinder for a steam-trough mangle | |
US2948966A (en) | Drier | |
CN112665358A (en) | Gypsum board drying device and drying method thereof | |
JP2840910B2 (en) | Steam heating device | |
CN213147137U (en) | Temperature control system of liquid vacuum belt dryer | |
CN214746777U (en) | Microwave hot air drying device | |
JPH024394Y2 (en) | ||
CN211651155U (en) | Input structure and drying-machine with ball valve control structure | |
KR100232168B1 (en) | Laundry drying method for drum type washing machine | |
KR890003275B1 (en) | A method for control of drying veneer | |
JPH0681264A (en) | Method for controlling water content of sized yarn |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080814 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090814 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090814 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100814 Year of fee payment: 12 |
|
LAPS | Cancellation because of no payment of annual fees |