WO2006077655A1 - Method of drying or concentrating substance under reduced pressure - Google Patents

Method of drying or concentrating substance under reduced pressure Download PDF

Info

Publication number
WO2006077655A1
WO2006077655A1 PCT/JP2005/001173 JP2005001173W WO2006077655A1 WO 2006077655 A1 WO2006077655 A1 WO 2006077655A1 JP 2005001173 W JP2005001173 W JP 2005001173W WO 2006077655 A1 WO2006077655 A1 WO 2006077655A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
heating
drying
substance
under reduced
Prior art date
Application number
PCT/JP2005/001173
Other languages
French (fr)
Japanese (ja)
Inventor
Shunichi Yagi
Original Assignee
Shunichi Yagi
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 Shunichi Yagi filed Critical Shunichi Yagi
Priority to PCT/JP2005/001173 priority Critical patent/WO2006077655A1/en
Priority to JP2006553810A priority patent/JP4700625B2/en
Publication of WO2006077655A1 publication Critical patent/WO2006077655A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/048—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum in combination with heat developed by electro-magnetic means, e.g. microwave energy

Definitions

  • the present invention is used for drying or concentrating various industrial materials, and provides a control that makes it possible to obtain highly accurate reproducibility. Concentration method. Background art
  • drying control or concentration control in a method of drying or concentrating a substance under reduced pressure was controlled by time control or database numerical management.
  • an object to be dried is set in a decompression tank, the pressure of the decompression tank is controlled toward one or more target degrees of vacuum, and the object to be dried is controlled with controlled microwave heating.
  • the reduced pressure is applied during the simultaneous heating and drying process of the controlled microwave heating and the controlled far-infrared heating. It is characterized by the fact that a microwave discharge phenomenon is generated at an acute angle part of a metal part built in the tank, and when the discharge phenomenon is detected, the microwave heating is finished or temporarily stopped to control the drying process. Yes There is a method of drying the material to be dried (see Japanese Patent No. 2 9 3 2 4 2 8). Disclosure of the invention
  • drying control or concentration control under reduced pressure of substances has been generally controlled by time control or numerical control based on data, but substances to be input in drying or concentration of substances under reduced pressure. Even if they are the same substance, the water content may be different. In addition, when it was difficult to accurately measure the weight of the substance to be added, it was extremely difficult to ensure the uniformity of the drying and concentration results.
  • the amount of substance to be introduced is different for each drying and concentration in order to ensure the reproducibility of the uniform drying and uniform concentration of the dry substance and concentrated substance.
  • vacuum pumps generally cannot always reproduce the same pressure, that is, they are always operated with some error values.
  • the pressure value formed in the heating process is continuously detected, and the pressure difference from the maximum pressure is specified on the pressure line that decreases from the maximum pressure formed in the pressure curve, and the pressure
  • a method for drying or concentrating a substance according to the present invention under reduced pressure is This is a method of drying or concentrating a substance that removes moisture by subjecting the substance to microwave heating, in which steam is exhausted using a vacuum pump with a constant displacement in the heating process, and a microwave with a constant output is used.
  • the pressure curve is formed as shown in Fig. 1, and pressure measurement is started at time a at the first minimum pressure value where pressure reduction has progressed.
  • the pressure difference value is specified at the stage where the pressure decreases from the maximum pressure value, based on the maximum pressure value at which the pressure has increased.
  • the method for drying or concentrating a substance under reduced pressure is characterized in that the heating process control is provided a plurality of times, and the reproducibility accuracy of the drying or concentrating results at each input is further improved.
  • the pressure of the substance is lowered by the heat of vaporization of the remaining water by depressurizing for a predetermined time for the purpose of maintaining the quality of the substance.
  • the method is a method of drying or concentrating under reduced pressure of a substance that enters the heating step again or returns to atmospheric pressure to finish drying or concentrating. Action
  • the generation of steam is the expansion pressure, which hinders the progress of decompression in the decompression tank.
  • the basic amount of steam generated is determined by the microwave output, and the amount of steam generated changes at a constant rate due to changes in the residual amount of substance moisture. If the characteristics of this pressure change are captured, the amount of material input, that is, the amount of water Even if the amount is different for each drying and concentration, it is possible to capture changes in the moisture content of the substance, and it is possible to extract dried products and concentrates with a uniform moisture content each time.
  • microwave heating with a constant output is performed, and a constant vacuum pump displacement is used to form a pressure curve as shown in Fig. 1, and pressure is continuously detected from point a. Go.
  • the arrows on the chart indicate that the amount of vapor generated from the substance exceeds the displacement of the vacuum pump and the pressure increases.
  • the final stage of drawing the curve to the right on the pressure chart that is, the stage where the maximum pressure from b 'to b ⁇ is formed, that is, the arrow / 3 indicates the amount of steam generated from the substance and the amount of vacuum pump displacement. It shows a state of almost equilibrium. Eventually, after this equilibrium phase, as the amount of water remaining in the substance decreases, the amount of steam generated gradually decreases, so the pressure decreases.
  • the amount of steam generated decreases as the amount of exhaust from the vacuum pump exceeds the amount of steam generated and the amount of residual moisture in the material decreases. It shows how the pressure is lowered to exceed the amount of generated gas.
  • the microwave output is constant, indicating that steam generation equal to or greater than the displacement of the vacuum pump has been eliminated at the end of i3.
  • the water content decreases at a low rate according to the pressure decrease, so by specifying the value of d, it can be taken out with approximate water content each time.
  • a large amount of water is added as shown in Fig. 2
  • the time from ⁇ to / 3 is automatically extended, and when a low amount of water is added as shown in Fig. 3, Hi / 3 is completed.
  • the time to do is almost proportionally and automatically shortened.
  • the amount of steam generated decreases as the amount of residual moisture in the substance decreases, as described above, but the moisture content is almost approximated at the point b ⁇ at the end of / 3.
  • the amount of substance input is different, the amount of water remaining each time is different. Therefore, when a large amount of material is added, the time of “a” is automatically increased, and when a small amount of material is input, the time of “a” is automatically shortened.
  • the microphone mouth wave output is constant, the amount of steam generated is controlled at a constant rate even during the first stage, and the time to reach the specified pressure difference, that is, the pressure formation time due to the amount of evaporation is small. This is because it is automatically adjusted.
  • the value of the pressure at which the heating is stopped or stopped does not necessarily match each time, and naturally the remaining water amount is different at each time, but the moisture content is approximate.
  • the value of d is a common value.
  • the same work may be performed in two or more heating steps.
  • the substance is depressurized for a predetermined time to If the temperature is lowered, it is possible to avoid oxidation at the time of return pressure if damage is caused by high temperature, and it is possible to take out high-quality dried products and concentrated products.
  • various methods such as far-infrared heating or heating with a hot plate are conceivable. However, since any energy is under reduced pressure even after the heating is completed, heating immediately Since it cannot be stopped, it is excluded from the content of the claims, but it is also possible to control by adding these heating methods. Not restrained. Brief Description of Drawings
  • FIG. 1 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention.
  • FIG. 2 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention.
  • FIG. 3 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention.
  • FIG. 4 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention, and is a curve diagram when the control is performed a plurality of times.
  • FIG. 5 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention, and is a curve diagram when the control is performed a plurality of times.
  • FIG. 6 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention, and is a curve diagram when the control is performed a plurality of times.
  • a is the start of pressure measurement
  • b 'one b ⁇ is the maximum pressure during the heating process
  • c microwave stop
  • d specified pressure difference
  • the present invention can ensure the reproducibility of the uniform drying and uniform concentration of the dry substance and the concentrated substance when the dry substance and the concentrated substance are mass-produced.
  • the present invention can be controlled so that a highly reproducible result of uniform drying or uniform concentration can be obtained even if the amount of the substance to be charged is different at each drying or concentration.
  • concentration was performed 3 times.
  • the microphone mouth wave output was 5 kw, and a 5.5 kw vacuum pump was used.
  • Aloe vera jewel with a moisture content of 99.5% was used as the input material.
  • the first charge is 5 0 0 0 g
  • the second charge is 6 0 0 0 g
  • 3 The eye load was set to 7 0 0 0 g.
  • the heating was stopped each time when the pressure of 0.08 kPa dropped from the pressure in the / 3 stage, and the pressure was reduced for 5 minutes to end.
  • the pressure formed in the three stages was 3.99 kPa.
  • the heating time was 3 2 minutes 45 seconds, the remaining weight was 1 6 5 7 g, and the moisture content was 9 8. 0 7%.
  • the heating time was 39 minutes 30 seconds, the remaining weight was 1 986 g, and the moisture content was 98.1 8%.
  • the heating time was 46 minutes and 15 seconds, the remaining weight was 2 3 1 2 g, and the moisture content was 98.4%.
  • Step 1 is to stop heating when the 0.20 k Pa pressure drops from the maximum pressure in step 1
  • control of step 2 is to control the maximum pressure from step 2 to 0.0.
  • Heating is stopped when the 7 kPa pressure drops
  • control of process 3 is to stop heating when the 0.03 kPa pressure drops from the maximum pressure of 3 in the process. did.
  • the pressure was reduced for 5 minutes to reduce the temperature of the substance.
  • 500 g of strawberries with a moisture content of 90.00% were introduced in the first time, and 500 g of strawberries with a moisture content of 88.0% were introduced in the second time. Put 6 00 0 0 g of strawberries with a moisture content of 9 0. 0%, In the fourth round, 60.0 g of strawberry with a moisture content of 88.0% was added.
  • the drying time was 75 minutes, the dry weight was 5 19 g, and the water content was 3.6 6%.
  • the drying time was 72 minutes, the dry weight was 624 g, and the water content was 3.85%.
  • the drying time was 85 minutes, the dry weight was 6 2 2 g, and the moisture content was 3.5 4%.
  • the drying time was 81 minutes, the dry weight was 7 47 g, and the moisture content was 3.6 1%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

[PROBLEMS] In the mass production of dry substance or concentrate, to ensure the recurrence of uniform drying or uniform concentrating of a substance to be dried or to be concentrated. [MEANS FOR SOLVING PROBLEMS] There is provided a method of drying or concentrating a substance through microwave heating of the substance under reduced pressure to thereby effect water removal, wherein in the heating step, not only is vapor discharge carried out by means of a vacuum pump of given air volume displacement but also heating is conducted with the use of microwave of given output to thereby form a pressure curve, and wherein on a pressure curve obtained by initiating pressure measurement at the time of first minimum pressure value upon progression of pressure reduction, which pressure curve shows pressure increase from the first minimum pressure value in accordance with progression of heating of the heating object, a pressure difference value is designated in the stage of, with the maximum pressure value brought about by pressure increase as a basis, pressure decrease from the maximum pressure value and when the pressure decreases to the pressure difference value, the heating is discontinued or terminated.

Description

明 細 書  Specification
物質の減圧下における乾燥または濃縮方法 技術分野 Method for drying or concentrating substances under reduced pressure
本発明は様々な産業素材の乾燥または濃縮に用いられ、 精度の高 い再現性を得ることを可能とする制御を提供するものであり、 産業 分野全般に適用される物質の減圧下における乾燥または濃縮方法に 関する。 背景技術  The present invention is used for drying or concentrating various industrial materials, and provides a control that makes it possible to obtain highly accurate reproducibility. Concentration method. Background art
物質の減圧下における乾燥または濃縮方法における乾燥制御また は濃縮制御は、 一般的には時間制御やデータベースの数値管理によ る制御が行われていた。  In general, drying control or concentration control in a method of drying or concentrating a substance under reduced pressure was controlled by time control or database numerical management.
例えば先行技術として、 被乾燥物を減圧槽にセッ トし、 該減圧槽 を単数または複数の目標減圧度に向けて圧力制御し、 かつ被乾燥物 に、 コントロールされたマイクロ波加熱とコントロールされた遠赤 外線加熱を全乾燥工程の一部又は全部で同時に行う被乾燥物の乾燥 方法において、 前記コントロールされたマイクロ波加熱と前記コン 卜ロールされた遠赤外線加熱の同時加熱乾燥工程時に、 前記減圧槽 に内蔵した金属部品の鋭角な部分でマイクロ波による放電現象を発 生させ、 その放電現象を検知した時点でマイクロ波加熱を終了また は一時停止することによって乾燥工程制御を行うことを特徴とする 被乾燥物の乾燥方法がある（特許第 2 9 3 2 4 2 8号公報参照）。 発明の開示  For example, as a prior art, an object to be dried is set in a decompression tank, the pressure of the decompression tank is controlled toward one or more target degrees of vacuum, and the object to be dried is controlled with controlled microwave heating. In the method for drying an object to be dried, in which far-infrared heating is performed simultaneously in part or all of the entire drying process, the reduced pressure is applied during the simultaneous heating and drying process of the controlled microwave heating and the controlled far-infrared heating. It is characterized by the fact that a microwave discharge phenomenon is generated at an acute angle part of a metal part built in the tank, and when the discharge phenomenon is detected, the microwave heating is finished or temporarily stopped to control the drying process. Yes There is a method of drying the material to be dried (see Japanese Patent No. 2 9 3 2 4 2 8). Disclosure of the invention
発明が解決しょうとする課題 従来の物質の減圧下における乾燥制御または濃縮制御は、 一般的 に時間制御ゃデ一夕ベースの数値管理による制御等が行われてきた が、 物質の減圧下における乾燥や濃縮において、 投入する物質が同 一物質であったとしても含水率は異なる場合がある。 また投入する 物質の精度の高い重量測定が困難である場合には、 乾燥結果や濃縮 結果の均一性を確保することは極めて困難であった。 Problems to be solved by the invention Conventionally, drying control or concentration control under reduced pressure of substances has been generally controlled by time control or numerical control based on data, but substances to be input in drying or concentration of substances under reduced pressure. Even if they are the same substance, the water content may be different. In addition, when it was difficult to accurately measure the weight of the substance to be added, it was extremely difficult to ensure the uniformity of the drying and concentration results.
したがって、 上記乾燥物質や濃縮物質を量産する場合に、 該乾燥 物質や濃縮物質の均一乾燥や均一濃縮の再現性を確保するために、 投入する物質量等が乾燥や濃縮の各回で異なっていても均一乾燥や 均一濃縮の再現性の高い結果を得ることのできる制御が必要であつ た。  Therefore, when mass-producing the above-mentioned dry substance and concentrated substance, the amount of substance to be introduced is different for each drying and concentration in order to ensure the reproducibility of the uniform drying and uniform concentration of the dry substance and concentrated substance. In addition, it was necessary to have a control that can obtain highly reproducible results of uniform drying and uniform concentration.
また、 真空ポンプはその能力として、 一般的に常に同じ圧力を再 現することはできない、 すなわち、 常時多少の誤差数値を含んだ状 態で運転されるものである。  Also, vacuum pumps generally cannot always reproduce the same pressure, that is, they are always operated with some error values.
したがって形成される圧力を絶対値として捉えて制御した場合、 乾燥や濃縮の結果において含水率に大きな誤差が生じて均一乾燥や 均一濃縮の再現性を確保できない。  Therefore, if the pressure generated is controlled as an absolute value, a large error will occur in the moisture content in the results of drying and concentration, and reproducibility of uniform drying and uniform concentration cannot be ensured.
そこで、 本発明では、 加熱工程において形成される圧力値を連続 的に検知し、 圧力曲線において形成された極大圧力から低下してい く圧力線において、 極大圧力からの圧力差を指定し、 その圧力差に 到達した時点を捉えて加熱を停止または終了することによって、 投 入する物質量等が乾燥や濃縮の各回で異なっていたとしても、 また 真空ポンプのクリアランス誤差があつたとしても、 乾燥や濃縮の結 果における均一乾燥や均一濃縮の再現性を確保することに成功した。 課題を解決するための手段  Therefore, in the present invention, the pressure value formed in the heating process is continuously detected, and the pressure difference from the maximum pressure is specified on the pressure line that decreases from the maximum pressure formed in the pressure curve, and the pressure By stopping or ending heating when the difference is reached, even if the amount of substance to be injected is different at each drying or concentration, or even if there is a clearance error in the vacuum pump, We succeeded in ensuring the reproducibility of uniform drying and uniform concentration in the results of concentration. Means for solving the problem
本発明に係る物質の減圧下における乾燥または濃縮方法は、 減圧 下において物質にマイクロ波加熱を行って水分を除去する、 物質の 乾燥または濃縮方法であって、 加熱工程において一定排気量の真空 ポンプを用いて蒸気排気を行い、 かつ一定出力のマイクロ波を用い て加熱を行うことで、 圧力曲線を図 1のごとく圧力曲線を形成せし め、 減圧が進んだ最初の極小圧力値での時間 aで圧力測定を開始し、 該最初の極小圧力値から被加熱物に対する加熱が進み圧力が高くな つていく圧力曲線において、 圧力が高くなった極大圧力値を基準と して、 その極大圧力値から圧力が低下していく段階で圧力差数値を 指定し、 当該圧力差数値に圧力が低下した時点で加熱を停止または 終了することで、 減圧槽に投入する物質の重量あるいは含水率が投 入回ごとに異なっていたとしても、 各投入回の結果において近似の 含水率を再現し得ることを可能としたものである。 A method for drying or concentrating a substance according to the present invention under reduced pressure is This is a method of drying or concentrating a substance that removes moisture by subjecting the substance to microwave heating, in which steam is exhausted using a vacuum pump with a constant displacement in the heating process, and a microwave with a constant output is used. As shown in Fig. 1, the pressure curve is formed as shown in Fig. 1, and pressure measurement is started at time a at the first minimum pressure value where pressure reduction has progressed. In the pressure curve where the heating of the heated object progresses and the pressure increases, the pressure difference value is specified at the stage where the pressure decreases from the maximum pressure value, based on the maximum pressure value at which the pressure has increased. By stopping or terminating heating when the pressure drops to the value of the pressure difference, even if the weight or moisture content of the substance put into the decompression tank varies from one charge to another, It is obtained by allowing that it is possible to reproduce the moisture content of the approximation.
また本発明においては、 物質の減圧下における乾燥または濃縮方 法は、 加熱工程制御を複数回設け、 各投入回の乾燥あるいは濃縮結 果の再現性精度をさらに高めたことを特徴とする。  In the present invention, the method for drying or concentrating a substance under reduced pressure is characterized in that the heating process control is provided a plurality of times, and the reproducibility accuracy of the drying or concentrating results at each input is further improved.
さらにまた本発明においては、 単数回または複数回の加熱工程が 各々終了した後に、 物質の品質保持を行うことを目的として所定時 間減圧を進め残存水分の気化熱により物質の温度を低下せしめ、 そ の後に再度加熱工程に入るか、 あるいは大気圧に復圧して乾燥また は濃縮を終了するようにした物質の減圧下における乾燥または濃縮 方法である。 作用  Furthermore, in the present invention, after each of the heating process or the heating process is completed, the pressure of the substance is lowered by the heat of vaporization of the remaining water by depressurizing for a predetermined time for the purpose of maintaining the quality of the substance. Thereafter, the method is a method of drying or concentrating under reduced pressure of a substance that enters the heating step again or returns to atmospheric pressure to finish drying or concentrating. Action
蒸気の発生は膨張圧力であり、 減圧槽内の減圧の進行を阻害する。 また蒸気の発生基本量はマイクロ波出力によって決定され、 かつ物 質水分の残存量変化によって蒸気の発生量は定率で変化する。 この 圧力変化の特徴を捉えれば、 物質の投入量、 すなわち投入された水 分量が乾燥や濃縮の各回で異なっていても、 物質の水分率変化を捉 えることができ、 各回均一な水分率の乾燥物や濃縮物をとりだすこ とができる。 The generation of steam is the expansion pressure, which hinders the progress of decompression in the decompression tank. In addition, the basic amount of steam generated is determined by the microwave output, and the amount of steam generated changes at a constant rate due to changes in the residual amount of substance moisture. If the characteristics of this pressure change are captured, the amount of material input, that is, the amount of water Even if the amount is different for each drying and concentration, it is possible to capture changes in the moisture content of the substance, and it is possible to extract dried products and concentrates with a uniform moisture content each time.
具体的には、 加熱工程において、 一定出力のマイクロ波加熱を行 い、 かつ一定の真空ポンプ排気量を用い、 図 1のごとくの圧力曲線 を形成せしめ、 a 時点から連続で圧力を検知していく。 チャートに おける矢印ひは物質からの蒸気発生量が真空ポンプの排気量を上回 り、 圧力が高くなつていく様子を示す。 圧力チャートで右上がりの 曲線を描く段階の最終段階、 すなわち b 'の段階から b〃 までの極大 圧力を形成する段階、 すなわち矢印 /3は物質からの蒸気発生量と真 空ボンプの排気量がほぼ均衡している様子を示す。 やがてこの均衡 段階を経て、物質の水分残量が減少するにつれ、蒸気の発生量は徐々 に減少するので圧力は低下していく。 すなわち、 矢印ァの段階は、 真空ポンプの排気量が蒸気発生量を上回り、 物質の残水分量が減少 していくにつれ蒸気発生量が減少していくために、 真空ポンプの排 気量が蒸気の発生量を上回るために圧力が低くなつていく様子を示 す。 圧力の極大値と、 低下していく圧力値との圧力差 dを指定して おき、 その圧力差に到達した時点、 たとえば cの時点で加熱を停止 すれば、 乾燥や濃縮の各回に投入された水分量が異なっていても各 回近似の含水率で取り出すことができる。  Specifically, in the heating process, microwave heating with a constant output is performed, and a constant vacuum pump displacement is used to form a pressure curve as shown in Fig. 1, and pressure is continuously detected from point a. Go. The arrows on the chart indicate that the amount of vapor generated from the substance exceeds the displacement of the vacuum pump and the pressure increases. The final stage of drawing the curve to the right on the pressure chart, that is, the stage where the maximum pressure from b 'to b〃 is formed, that is, the arrow / 3 indicates the amount of steam generated from the substance and the amount of vacuum pump displacement. It shows a state of almost equilibrium. Eventually, after this equilibrium phase, as the amount of water remaining in the substance decreases, the amount of steam generated gradually decreases, so the pressure decreases. That is, in the stage indicated by the arrow a, the amount of steam generated decreases as the amount of exhaust from the vacuum pump exceeds the amount of steam generated and the amount of residual moisture in the material decreases. It shows how the pressure is lowered to exceed the amount of generated gas. Specify the pressure difference d between the maximum pressure value and the decreasing pressure value.When the pressure difference is reached, for example, when the heating is stopped at the time point c, the pressure difference is input each time drying and concentration are performed. Even if the amount of water is different, it can be taken out at an approximate moisture content each time.
なぜならば、 マイクロ波出力が一定であるので、 i3の終了段階に おいては真空ポンプの排気量と同等以上の蒸気発生がなくなつたこ とを示し、 ァでは定率に蒸気の発生量が減少していく ことを示す。 すなわち圧力が物質の含水率の定率な減少に準じて低くなつていく 状態を示すからである。 逆に言えば、 圧力の低圧化に準じて低率的 に含水率は下がっていくのであるから、 dの値を指定することで、 各回近似の含水率で取り出すことができる。 図 2のように投入した水分が多い場合は、 αから /3が終了する までの時間が自動的に長くなり、 図 3のように投入した水分が少な い場合は、 ひから /3が終了するまでの時間が、 図 2 と比較してほぼ 比例計算的にかつ自動的に短くなる。 すなわち、 マイクロ波出力が 一定であるので、 基本的な蒸気発生量は規定されており、 3が終了 する段階でほぼ物質の含水率は各回近似に調整されている。 しかし ながら未だこの /3の段階では、 時間制御ではない自動制御を行うこ とは、 圧力がほぼ一定してしまっているので困難であり、 次の圧力 が低下していく ァの段階で制御を行うことが必要となる。 This is because the microwave output is constant, indicating that steam generation equal to or greater than the displacement of the vacuum pump has been eliminated at the end of i3. Show that In other words, it shows a state in which the pressure becomes lower according to a constant decrease in the moisture content of the substance. In other words, the water content decreases at a low rate according to the pressure decrease, so by specifying the value of d, it can be taken out with approximate water content each time. When a large amount of water is added as shown in Fig. 2, the time from α to / 3 is automatically extended, and when a low amount of water is added as shown in Fig. 3, Hi / 3 is completed. Compared to Fig. 2, the time to do is almost proportionally and automatically shortened. In other words, since the microwave output is constant, the basic steam generation rate is specified, and the water content of the substance is adjusted to approximate each time when step 3 is completed. However, it is still difficult to perform automatic control that is not time control at this third stage because the pressure is almost constant, and control is performed at the next stage when the next pressure decreases. It is necessary to do.
ァの段階では、 前述のように蒸気の発生量は物質の残水分量の低 下に準じて減少していくのであるが、 /3の終了時点の b〃 時点では 水分率がほぼ近似するのであって、 物質の投入量が異なれば、 各回 の水分残量は異なる。 したがって、 多い物質量の投入を行った回に は、 ァの時間は自動的に長くなり、 少ない物質量の投入を行った回 には、 ァの時間は自動的に短くなる。 これを近似の含水率で取り上 げるためには、 b〃 段階での圧力から指定の圧力差を指定し、 その 圧力に到達した段階で加熱を停止するか終了すれば、 各回近似の含 水率で取り上げることが可能となる。 なぜならば、 前述のようにマ イク口波出力が一定であるので、 ァ段階でも蒸気の発生量は定率に 制御され、 指定圧力差への到達時間、 すなわち蒸発量の大小による 圧力形成の時間が自動的に調整されるからである。 この加熱を停止 または終了する圧力の値は各回必ずしも一致せず、 当然各回の残水 分量は異なるのであるが、 水分率は近似する。  At this stage, the amount of steam generated decreases as the amount of residual moisture in the substance decreases, as described above, but the moisture content is almost approximated at the point b〃 at the end of / 3. And if the amount of substance input is different, the amount of water remaining each time is different. Therefore, when a large amount of material is added, the time of “a” is automatically increased, and when a small amount of material is input, the time of “a” is automatically shortened. In order to cover this with an approximate moisture content, specify the specified pressure difference from the pressure at step b〃 and stop or end the heating when the pressure is reached. It becomes possible to take up by the water rate. This is because, as described above, since the microphone mouth wave output is constant, the amount of steam generated is controlled at a constant rate even during the first stage, and the time to reach the specified pressure difference, that is, the pressure formation time due to the amount of evaporation is small. This is because it is automatically adjusted. The value of the pressure at which the heating is stopped or stopped does not necessarily match each time, and naturally the remaining water amount is different at each time, but the moisture content is approximate.
なお、 図 2及び図 3において、 dの値は共通値である。  2 and 3, the value of d is a common value.
さらに精度を確保するためには、 2回以上の複数回の加熱工程で 同様の作業を行えばよい。  In order to ensure further accuracy, the same work may be performed in two or more heating steps.
また、 各加熱工程を終了した後に、 所定時間の減圧を行って物質 の温度を低下させれば、 高温でのダメージゃ復圧時での酸化を免れ ることができ、 高品質な乾燥品や濃縮品を取り出すことができる。 なお、 当該マイクロ波加熱に加えて、 遠赤外線加熱やあるいはホ ッ 卜プレート等で加熱する方法等様々考えられるが、 いずれのエネ ルギーも加熱を終了しても減圧下であるために、 ただちに加熱停止 状態にすることはできないので、 請求項内容からは外したが、 これ らの加熱方法を加えて制御することも可能であるので、 当該発明は これらの様々な熱エネルギーを加えたかどうかには拘束されない。 図面の簡単な説明 In addition, after each heating step, the substance is depressurized for a predetermined time to If the temperature is lowered, it is possible to avoid oxidation at the time of return pressure if damage is caused by high temperature, and it is possible to take out high-quality dried products and concentrated products. In addition to the microwave heating, various methods such as far-infrared heating or heating with a hot plate are conceivable. However, since any energy is under reduced pressure even after the heating is completed, heating immediately Since it cannot be stopped, it is excluded from the content of the claims, but it is also possible to control by adding these heating methods. Not restrained. Brief Description of Drawings
図 1は本発明に係る減圧下における乾燥または濃縮方法を示す圧力 と時間の関係を示す特性曲線である。 FIG. 1 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention.
図 2は本発明に係る減圧下における乾燥または濃縮方法を示す圧力 と時間の関係を示す特性曲線である。 FIG. 2 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention.
図 3は本発明に係る減圧下における乾燥または濃縮方法を示す圧力 と時間の関係を示す特性曲線である。 FIG. 3 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention.
図 4は本発明に係る減圧下における乾燥または濃縮方法を示す圧力 と時間の関係を示す特性曲線で、 制御を複数回実施した場合の曲線 図である。 FIG. 4 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention, and is a curve diagram when the control is performed a plurality of times.
図 5は本発明に係る減圧下における乾燥または濃縮方法を示す圧力 と時間の関係を示す特性曲線で、 制御を複数回実施した場合の曲線 図である。 FIG. 5 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention, and is a curve diagram when the control is performed a plurality of times.
図 6は本発明に係る減圧下における乾燥または濃縮方法を示す圧力 と時間の関係を示す特性曲線で、 制御を複数回実施した場合の曲線 図である。 FIG. 6 is a characteristic curve showing the relationship between pressure and time indicating the drying or concentration method under reduced pressure according to the present invention, and is a curve diagram when the control is performed a plurality of times.
符号の説明 Explanation of symbols
aは圧力測定の開始、 b ' 一 b〃 は加熱工程中の極大圧力、 a is the start of pressure measurement, b 'one b〃 is the maximum pressure during the heating process,
cはマイクロ波停止、 dは指定圧力差、 c is microwave stop, d is specified pressure difference,
Q!(a〜 b ' )はポンプ排気量 <蒸気発生量、 Q! (A ~ b ') is pump displacement <steam generation,
i3(b '〜 b〃 ；)はポンプ排気量 ^蒸気発生量、 i3 (b '~ b〃;) is pump displacement ^ steam generation,
r (b" 〜 c )はポンプ排気量 >蒸気発生量、 r (b "to c) is pump displacement> steam generation,
a〜 cはマイクロ波同一出力、 a ~ c is the same microwave output,
e〜 gはマイクロ波同一出力、 e ~ g is the same microwave output,
図 1〜図 6に示す特性曲線の実線はマイクロ波加熱が〇Nを示し、 破 線はマイクロ波加熱が O F Fを示す。 発明の効果 The solid lines of the characteristic curves shown in Fig. 1 to Fig. 6 indicate ○ N for microwave heating, and the broken line indicates OFF for microwave heating. The invention's effect
本発明は乾燥物質や濃縮物質を量産する場合に、 該乾燥物質や濃 縮物質の均一乾燥や均一濃縮の再現性を確保することができる。  The present invention can ensure the reproducibility of the uniform drying and uniform concentration of the dry substance and the concentrated substance when the dry substance and the concentrated substance are mass-produced.
また本発明は、 投入する物質量等が乾燥や濃縮の各回で異なって いても均一乾燥や均一濃縮の再現性の高い結果を得ることのできる 制御が可能である。  In addition, the present invention can be controlled so that a highly reproducible result of uniform drying or uniform concentration can be obtained even if the amount of the substance to be charged is different at each drying or concentration.
また、 真空ポンプのク リアランス誤差があつたとしても、 乾燥や 濃縮の結果における均一乾燥や均一濃縮の再現性を確保することが できる。 発明を実施するための最良の形態  In addition, even if there is a clearance error of the vacuum pump, it is possible to ensure the reproducibility of uniform drying and concentration in the result of drying and concentration. BEST MODE FOR CARRYING OUT THE INVENTION
添付図面を参照して本発明に係る実施の形態について説明する。 実施例 1  Embodiments according to the present invention will be described with reference to the accompanying drawings. Example 1
図 1のような圧力曲線を描く工程を用いて 3倍濃縮を行った。 マ イク口波出力を 5 kwとし、 5. 5 k wの真空ポンプを使用した。 投入する物質として含水率 9 9. 5 %のアロエベラのジエルを使用 した。 1 回目の投入は 5 0 0 0 g、 2回目の投入は 6 0 0 0 g、 3 目の投入は 7 0 0 0 gとした。 Using the process of drawing a pressure curve as shown in Fig. 1, concentration was performed 3 times. The microphone mouth wave output was 5 kw, and a 5.5 kw vacuum pump was used. Aloe vera jewel with a moisture content of 99.5% was used as the input material. The first charge is 5 0 0 0 g, the second charge is 6 0 0 0 g, 3 The eye load was set to 7 0 0 0 g.
ァ段階における加熱終了の条件として、 /3段階における圧力から 0. 0 8 k Pa圧力が低下した段階で各回加熱を停止し、 5分間 減圧を行って終了することとした。 3段階で形成された圧力は、 3. 9 9 k Paであった。  As the conditions for the end of heating in the stage A, the heating was stopped each time when the pressure of 0.08 kPa dropped from the pressure in the / 3 stage, and the pressure was reduced for 5 minutes to end. The pressure formed in the three stages was 3.99 kPa.
濃縮結果として、 1回目の投入では、 加熱所要時間は 3 2分 4 5 秒、 残重量は 1 6 5 7 g、 含水率は 9 8. 0 7 %であった。  As a result of concentration, in the first charging, the heating time was 3 2 minutes 45 seconds, the remaining weight was 1 6 5 7 g, and the moisture content was 9 8. 0 7%.
2回目の投入では、 加熱所要時間は 3 9分 3 0秒、 残重量は 1 9 8 6 g、 含水率は 9 8. 1 8 %であった。  In the second charge, the heating time was 39 minutes 30 seconds, the remaining weight was 1 986 g, and the moisture content was 98.1 8%.
3回目の投入では、 加熱所要時間は 4 6分 1 5秒、 残重量は 2 3 1 2 g、 含水率は 9 8. 4 0 %であった。  In the third charge, the heating time was 46 minutes and 15 seconds, the remaining weight was 2 3 1 2 g, and the moisture content was 98.4%.
かく して、 各回近似の濃縮結果、 すなわち近似の含水率結果を得 た。  Thus, an approximate concentration result, that is, an approximate moisture content result was obtained each time.
実施例 2 Example 2
図 6に示す圧力曲線を描く工程を用いて、 乾燥を行った。 マイク 口波出力を工程 1では 5 k w、 工程 2では 2 k w、 工程 3では l k wを使用し、 当該制御を各工程とも実施することとした。 工程 1の 制御として、 工程 1中の極大圧力から 0. 2 0 k Pa圧力が低下し た時点で加熱を停止することとし、 また工程 2の制御として、 工程 2中の極大圧力から 0. 0 7 k Pa圧力が低下した時点で加熱を停 止することとし、 また工程 3の制御として、 工程中 3の極大圧力か ら 0. 0 3 k Pa圧力が低下した時点で加熱を停止することとした。 各工程の加熱停止後においてそれぞれ 5分間減圧を行い、 物質の温 度を低下させることとした。  Drying was performed using the process of drawing the pressure curve shown in FIG. Microphone mouth wave output was 5 kW in process 1, 2 kW in process 2, and l kw in process 3, and the control was implemented in each process. Control of step 1 is to stop heating when the 0.20 k Pa pressure drops from the maximum pressure in step 1, and control of step 2 is to control the maximum pressure from step 2 to 0.0. Heating is stopped when the 7 kPa pressure drops, and the control of process 3 is to stop heating when the 0.03 kPa pressure drops from the maximum pressure of 3 in the process. did. After stopping heating in each process, the pressure was reduced for 5 minutes to reduce the temperature of the substance.
投入する物質として、 1回目には含水率 9 0. 0%のイチゴ 5 0 0 gを投入し、 2回目には含水率 8 8. 0 %のイチゴ 5 0 0 0gを 投入し、 3回目には含水率 9 0. 0 %のイチゴ 6 0 0 0 gを投入し、 4回目には含水率 8 8 . 0 %のイチゴ 6 0 0 0 gを投入した。 As a substance to be introduced, 500 g of strawberries with a moisture content of 90.00% were introduced in the first time, and 500 g of strawberries with a moisture content of 88.0% were introduced in the second time. Put 6 00 0 0 g of strawberries with a moisture content of 9 0. 0%, In the fourth round, 60.0 g of strawberry with a moisture content of 88.0% was added.
乾燥結果として、 1回目の投入では乾燥所要時間は 7 5分、 乾燥 重量は 5 1 9 g、 含水率は 3 . 6 6 %であつた。  As a result of drying, in the first charge, the drying time was 75 minutes, the dry weight was 5 19 g, and the water content was 3.6 6%.
2回目の投入では、 乾燥所要時間は 7 2分、 乾燥重量は 6 2 4 g、 含水率は 3 . 8 5 %であった。  In the second charge, the drying time was 72 minutes, the dry weight was 624 g, and the water content was 3.85%.
3回目の投入では、 乾燥所要時間は 8 5分、 乾燥重量は 6 2 2 g、 含水率は 3 . 5 4 %であった。  In the third charge, the drying time was 85 minutes, the dry weight was 6 2 2 g, and the moisture content was 3.5 4%.
4回目の投入では、 乾燥所要時間は 8 1分、 乾燥重量は 7 4 7 g、 含水率は 3 . 6 1 %であった。  In the fourth charge, the drying time was 81 minutes, the dry weight was 7 47 g, and the moisture content was 3.6 1%.
かく して、 各回近似の乾燥結果、 すなわち近似の含水率結果を得 た。  Thus, an approximate drying result, that is, an approximate moisture content result was obtained each time.

Claims

請求の範囲 The scope of the claims
1 . 減圧下において物質にマイクロ波加熱を行って水分を！^する、 物質の乾燥ま たは濃縮方法であって、 加熱工程において一定排気量の真空ポンプを用いて蒸気排気 を行い、 力つ一定出力のマイクロ波を用いて加熱を行うことで、 圧力曲線を形成せし め、 減圧が進んだ最初の極小圧力値での時間で圧力測定を開始し、 該最初の極小圧力 値から被加熱物に対する加熱が進み圧力が高くなつていく圧力曲線において、 圧力が 高くなつた極大圧力値を基準として、 その極大圧力値から圧力が低下していく段階で 圧力差数値を指定し、 当該圧力差数値に圧力が低下した時点で加熱を停止または終了 することで、 減圧槽に投入する物質の重量あるいは含水率が投入回ごとに異なってい たとしても、 各投入回の結果において近似の含水率を再現し得ることを可能としたこ とを特徴とする物質の減圧下における乾燥または濃縮方法。 1. Water is heated by microwave heating under reduced pressure! This is a method for drying or concentrating substances, in which the pressure curve is obtained by performing steam exhaustion using a vacuum pump with a constant displacement in the heating process and heating using a microwave with a strong constant output. Pressure measurement is started at the time of the first minimum pressure value at which pressure reduction has progressed, and the pressure curve in which the heating of the object to be heated proceeds from the first minimum pressure value and the pressure increases. By specifying the pressure difference value at the stage where the pressure decreases from the maximum pressure value based on the maximum pressure value with a high pressure, and stopping or terminating heating when the pressure drops to the pressure difference value. Even if the weight or moisture content of the substance put into the vacuum tank is different for each charge, it is possible to reproduce the approximate moisture content in the result of each charge. Under reduced pressure Definitive drying or concentration method.
2. 請求項 1における加熱工程制御を複数回設け、 各投入回の乾燥あるいは濃縮結 果の再現性精度をさらに高めたことを特徴とする請求項 1記載の物質の減圧下におけ る乾燥または 方法。  2. The heating process control according to claim 1 is provided a plurality of times to further improve the reproducibility accuracy of the drying or concentration results of each charge, or drying under reduced pressure of the substance according to claim 1 Method.
3. 単数回または複数回の加熱工程が各々終了した後に、 物質の品質 を行うこ とを目的として所定時間減圧を進め残存水分の気ィ匕熱により物質の温度を低下せしめ、 その後に再度加熱工程に入るか、 あるいは大気圧に復圧して乾燥または濃縮を終了す るようにしたことを特徴とする請求項 1または請求項 2記載の物質の減圧下における 乾燥または 方法。  3. After one or more heating steps have been completed, the pressure of the substance is reduced for a predetermined time to reduce the temperature of the substance by the residual heat of the moisture in order to improve the quality of the substance, and then heated again. 3. The method for drying or reducing a substance under reduced pressure according to claim 1 or 2, wherein drying or concentration is completed by entering the process or returning to atmospheric pressure.
PCT/JP2005/001173 2005-01-21 2005-01-21 Method of drying or concentrating substance under reduced pressure WO2006077655A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2005/001173 WO2006077655A1 (en) 2005-01-21 2005-01-21 Method of drying or concentrating substance under reduced pressure
JP2006553810A JP4700625B2 (en) 2005-01-21 2005-01-21 Method for drying or concentrating substances under reduced pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/001173 WO2006077655A1 (en) 2005-01-21 2005-01-21 Method of drying or concentrating substance under reduced pressure

Publications (1)

Publication Number Publication Date
WO2006077655A1 true WO2006077655A1 (en) 2006-07-27

Family

ID=36692053

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/001173 WO2006077655A1 (en) 2005-01-21 2005-01-21 Method of drying or concentrating substance under reduced pressure

Country Status (2)

Country Link
JP (1) JP4700625B2 (en)
WO (1) WO2006077655A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012037135A (en) * 2010-08-06 2012-02-23 Mino Ceramic Co Ltd Microwave drying device and method of manufacturing inorganic material molded body using the same
CN102628639A (en) * 2012-05-09 2012-08-08 常州广为仪器科技有限公司 Vacuum drying device and vacuum drying control method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0374081A (en) * 1989-08-12 1991-03-28 Mitsubishi Agricult Mach Co Ltd Microwave control irradiation device
JPH0483573A (en) * 1990-07-25 1992-03-17 Matsushita Electric Ind Co Ltd Garbage disposal apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2758062B2 (en) * 1990-03-30 1998-05-25 マツダ株式会社 Vehicle suspension device
JP2932428B2 (en) * 1996-03-28 1999-08-09 八木 俊一 Drying method and apparatus for drying object
JP3284409B2 (en) * 1999-04-27 2002-05-20 エリー株式会社 Decompression method and device
JP3496023B2 (en) * 1999-06-09 2004-02-09 エリー株式会社 Heating method for liquid low content materials
JP3641715B2 (en) * 2000-09-19 2005-04-27 株式会社千代田製作所 How to thaw frozen products
JP2003054730A (en) * 2001-08-09 2003-02-26 Hitachi Zosen Corp Method for designing screw type conveyor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0374081A (en) * 1989-08-12 1991-03-28 Mitsubishi Agricult Mach Co Ltd Microwave control irradiation device
JPH0483573A (en) * 1990-07-25 1992-03-17 Matsushita Electric Ind Co Ltd Garbage disposal apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012037135A (en) * 2010-08-06 2012-02-23 Mino Ceramic Co Ltd Microwave drying device and method of manufacturing inorganic material molded body using the same
CN102628639A (en) * 2012-05-09 2012-08-08 常州广为仪器科技有限公司 Vacuum drying device and vacuum drying control method

Also Published As

Publication number Publication date
JP4700625B2 (en) 2011-06-15
JPWO2006077655A1 (en) 2008-06-19

Similar Documents

Publication Publication Date Title
JP5420682B2 (en) Wood drying method and unit for carrying out the method
CN102202850A (en) Methods and apparatus for drying ceramic green bodies with microwaves
FR2618721A1 (en) ADAPTIVE PRESSURE CONTROL SYSTEM BASED ON A MODEL AND METHOD FOR CURING A RESIN
WO2006077655A1 (en) Method of drying or concentrating substance under reduced pressure
CN108012401A (en) RF impedance matching process, adaptation and semiconductor processing device
EP2197641B1 (en) Process for curing and drying concrete
Rabidin et al. Characteristics of timbers dried using kiln drying and radio frequency-vacuum drying systems
CN102431067B (en) Pretreatment technology of atmospheric superheated steam for improving wood dimension stability
WO2004111292A1 (en) Method of gas carburizing
CN106191411A (en) A kind of time inside furnace control method for steel plate heat treatment
JP2008138894A (en) Manufacturing method of honeycomb structure
JP5632229B2 (en) Microwave drying apparatus and method for producing inorganic material molded body using the same
CN100344929C (en) Method and equipment for releasing internal stress through drying wood
JP2003112305A (en) Method and equipment for drying wood
JP6929021B2 (en) Method for manufacturing silicon oxide film
Claus Daniel et al. Transformational electrode drying process
JPS58141220A (en) Treatment of microporous cellulosic film
US7029540B2 (en) Method of gas carburizing
Xie et al. Effect of alternating vacuum and release process on drying characteristics of Log cross section during radio frequency drying
Avramidis Radio Frequency Vacuum Drying of Eucalypt Timbers
KR101765471B1 (en) Superheated steam generating apparatus for manufacturing process of secondary cell
CN116540526A (en) Second-order pure hysteresis object identification and PID parameter self-tuning method based on relay feedback
JPH02194350A (en) Water measuring method
JP5483319B2 (en) Wood drying method
Kim et al. Effects of Convective Vacuum Drying with Heating Coil on Properties of Pyinkado (Xylia Xylocarpa)

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2006553810

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 05704226

Country of ref document: EP

Kind code of ref document: A1

WWW Wipo information: withdrawn in national office

Ref document number: 5704226

Country of ref document: EP