JP3231850B2 - Drying method for high moisture content substances - Google Patents
Drying method for high moisture content substancesInfo
- Publication number
- JP3231850B2 JP3231850B2 JP22092092A JP22092092A JP3231850B2 JP 3231850 B2 JP3231850 B2 JP 3231850B2 JP 22092092 A JP22092092 A JP 22092092A JP 22092092 A JP22092092 A JP 22092092A JP 3231850 B2 JP3231850 B2 JP 3231850B2
- Authority
- JP
- Japan
- Prior art keywords
- drying
- dried
- moisture content
- drying chamber
- high moisture
- 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
- 238000001035 drying Methods 0.000 title claims description 55
- 239000000126 substance Substances 0.000 title description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 11
- 239000010802 sludge Substances 0.000 description 11
- 238000012546 transfer Methods 0.000 description 7
- 238000001291 vacuum drying Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000015203 fruit juice Nutrition 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Drying Of Solid Materials (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Treatment Of Sludge (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、廃水処理装置において
発生する汚泥などのように含有水分の高い物質を効率良
く乾燥する高水分含有物質の乾燥方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for efficiently drying a substance having a high water content, such as sludge generated in a waste water treatment apparatus, and to a method for drying the high water content substance.
【０００２】[0002]
【従来の技術】従来、下水処理やし尿処理などの廃水処
理においては、生物学的処理が広く実施されているが、
この場合、余剰汚泥が発生し、この余剰汚泥の処理が新
たな問題となっている。従来公知の汚泥処理方法として
は、スラリー状の汚泥をベルトフィルターなどを用いて
脱水したのち乾燥して、肥料などに再利用するか、ある
いは焼却処分するのが一般的である。乾燥前の脱水汚泥
は、脱水機の種類にもよるが通常８０〜９０％の水分を
含むために、乾燥に非常に多くの熱エネルギーを必要と
し、そのため経済的な乾燥機が求められている。乾燥機
としては、バンド乾燥機，通気回転乾燥機，流動層乾燥
機などが多く用いられているが、いずれも高温の熱風を
用いるものである。2. Description of the Related Art Conventionally, biological treatment is widely performed in wastewater treatment such as sewage treatment and human waste treatment.
In this case, excess sludge is generated, and treatment of the excess sludge is a new problem. As a conventionally known sludge treatment method, generally, sludge in the form of slurry is dehydrated using a belt filter and the like, and then dried and reused as fertilizers or incinerated. The dewatered sludge before drying usually contains a large amount of 80 to 90% water, depending on the type of the dehydrator, and therefore requires a great deal of heat energy for drying. Therefore, an economical dryer is required. . As a dryer, a band dryer, a ventilation rotary dryer, a fluidized-bed dryer and the like are often used, and all use high-temperature hot air.
【０００３】[0003]
【発明が解決しようとする課題】前述の乾燥機を使用す
る場合は、乾燥機本体のほかに熱風発生炉，ガス循環装
置，除湿装置，除塵装置，脱臭装置などの付帯設備を必
要とし、そのため全体として非常に大きな設備となり、
かつ建設費，運転費が共に高くなると共に大きな敷地面
積を必要とする。一方、高温の熱風により被乾燥物を直
接加熱する前記従来の方式に対して、真空乾燥方式は、
低温で乾燥できるので、設備がコンパクトになることな
どの利点があるが、しかし、次の問題点がある。第一
に、真空乾燥機の運転中は乾燥室内を真空に保つため、
被乾燥物を連続して供給しかつ排出することが難しく、
そのため連続運転が困難で、バッチ運転になるという問
題点がある。第二に、汚泥などのように含有水分の高い
物質をバッチ運転で乾燥する場合、乾燥途中で被乾燥物
が「べとべと」した状態になったり、「モチ状」になる
など、様々な性状に変化するため効率的な処理が困難で
ある。特に、真空乾燥方式においては、乾燥に必要な熱
エネルギーの供給手段がジャケットまたは加熱コイルに
よる間接加熱となるが、様々な性状に変化する被乾燥物
に対して高い総括熱伝達係数を得る手段がないという問
題点がある。第三に、乾燥には非常に多くの熱エネルギ
ーを必要とするが、バッチ運転では、熱エネルギーを回
収する効果的なシステムが得られないという問題点があ
る。When the above-mentioned dryer is used, ancillary equipment such as a hot-air generating furnace, a gas circulating device, a dehumidifying device, a dust removing device, and a deodorizing device are required in addition to the dryer itself. Very large equipment as a whole,
In addition, construction costs and operating costs both increase, and a large site area is required. On the other hand, in contrast to the conventional method of directly heating the object to be dried by high-temperature hot air, the vacuum drying method is:
Since it can be dried at a low temperature, there are advantages such as downsizing of equipment, but there are the following problems. First, to keep the drying chamber vacuum during the operation of the vacuum dryer,
It is difficult to continuously supply and discharge the material to be dried,
Therefore, there is a problem that continuous operation is difficult and batch operation is performed. Second, when drying a substance with a high water content such as sludge in a batch operation, the material to be dried may become `` sticky '' or `` sticky '' during drying. It is difficult to process efficiently because it changes. In particular, in the vacuum drying method, the means for supplying the thermal energy required for drying is indirect heating by a jacket or a heating coil, but a means for obtaining a high overall heat transfer coefficient for the material to be dried that changes in various properties. There is a problem that there is no. Third, although drying requires a great deal of heat energy, there is a problem that an effective system for recovering heat energy cannot be obtained in batch operation.
【０００４】[0004]
【課題を解決するための手段】前述の問題を有利に解決
するために、本発明の高水分含有物質の乾燥方法におい
ては、加熱用ジャケット１と被乾燥物を流動化すること
ができる撹拌羽根２とを有する密閉型の乾燥室３内を減
圧状態に保持し、かつ被乾燥物の含有水分を４０％以下
に保持した状態で、運転中に含有水分８０％以上の被乾
燥物を供給することを特徴とする。 In order to advantageously solve the above-mentioned problems, in a method for drying a substance having a high moisture content according to the present invention, a heating jacket 1 and a stirring blade capable of fluidizing an object to be dried are provided. 2 and keep the inside of the closed type drying chamber 3 under reduced pressure, and reduce the moisture content of the material to be dried to 40% or less.
With the water content of 80% or more during operation
It is characterized by supplying a dried product.
【０００５】[0005]
【実施例】図１は本発明の方法を実施する装置の一例を
示すものであって、内容積１５０Ｌの縦型円筒状の密閉
可能な容器からなる乾燥室３の外面に、加熱用ジャケッ
ト１が設けられ、かつ前記乾燥室３の内部には被乾燥物
（被処理物）を流動化するための撹拌羽根２が設けら
れ、その撹拌羽根２は駆動用モータ４により伝動機構を
介して回転される。乾燥室３の上部に被乾燥物投入口５
が設けられると共に、乾燥室３の下部に乾燥物取出口６
が設けられ、かつ乾燥室３の上部に蒸気抜出口７が設け
られ、さらに乾燥室３に圧力計，温度計（図示を省略し
た）なども設けられている。FIG. 1 shows an example of an apparatus for carrying out the method of the present invention, in which a heating jacket 1 is provided on the outer surface of a drying chamber 3 comprising a vertical cylindrical sealable container having an inner volume of 150 L. And a stirring blade 2 for fluidizing an object to be dried (object to be processed) is provided inside the drying chamber 3, and the stirring blade 2 is rotated by a driving motor 4 via a transmission mechanism. Is done. Drying object inlet 5 in the upper part of drying room 3
Is provided, and a dried product outlet 6 is provided at a lower portion of the drying chamber 3.
Is provided, and a steam vent 7 is provided above the drying chamber 3, and a pressure gauge, a thermometer (not shown) and the like are also provided in the drying chamber 3.
【０００６】被乾燥物はホッパー８からポンプ９によっ
て乾燥室３に供給され、その乾燥室３内で、加熱用ジャ
ケット１による加熱と撹拌羽根２による撹拌熱とにより
乾燥され、かつ乾燥室３の内部は真空ポンプ１０により
減圧され、蒸発した水分はコンデンサー１１により凝縮
されて水になる。The material to be dried is supplied from a hopper 8 to a drying chamber 3 by a pump 9, and is dried in the drying chamber 3 by heating by a heating jacket 1 and stirring heat by a stirring blade 2. The inside is depressurized by a vacuum pump 10 and the evaporated water is condensed by a condenser 11 to become water.
【０００７】前記コンデンサー１１は、伝熱面積５．６
ｍ2 の多管式熱交換器であり、蒸発水分を除くことによ
り真空ポンプ１０を小型にできることと、ここで熱回収
することを目的としている。即ち、コンデンサー１１の
シェル側に冷却水を通し、チューブ側で蒸発水分を凝縮
させるのであるが、シェル側も真空ポンプ１２により減
圧しているので、供給された冷却水は、ここで蒸発した
のち、真空ポンプ１２により断熱圧縮されて高温の蒸気
となり、次いで乾燥室３の外周の加熱用ジャケット１に
供給される。The condenser 11 has a heat transfer area of 5.6.
This is a multi-tube heat exchanger of m 2 , which aims to reduce the size of the vacuum pump 10 by removing evaporated water and to recover heat here. That is, cooling water is passed through the shell side of the condenser 11 and the evaporated water is condensed on the tube side. Since the shell side is also depressurized by the vacuum pump 12, the supplied cooling water evaporates here. The heat is adiabatically compressed by a vacuum pump 12 to become high-temperature steam, and then supplied to the heating jacket 1 on the outer periphery of the drying chamber 3.
【０００８】図１に示す装置を使用して乾燥テストを行
った。この場合の運転条件とテスト結果は下記のとおり
である。 （１）被乾燥物：脱水余剰汚泥 （２）被乾燥物の乾燥前の水分：８５％ （３）初期被乾燥物投入量：４０Kg （４）被乾燥物供給量：３０Kg／Hr （５）被乾燥物供給時間：１０Hr （６）全運転時間：１１Hr （７）乾燥温度：６６℃ （８）乾燥圧力：２００TOrr （９）加熱用ジャケットの蒸気温度：１００℃ （１０）撹拌動力：６．０KW （１１）全消費動力：１１．０KW （１２）乾燥物単位重量当たり動力：０．３６７KWHr／
Kg，３１６Kcal／Kg （１３）乾燥物の水分：１１％A drying test was performed using the apparatus shown in FIG. The operating conditions and test results in this case are as follows. (1) Material to be dried: excess sludge to be dehydrated (2) Moisture before drying of the material to be dried: 85% (3) Input amount of initial material to be dried: 40 kg (4) Supply amount of material to be dried: 30 kg / Hr (5) (7) Drying temperature: 66 ° C. (8) Drying pressure: 200 TOrr (9) Steam temperature of heating jacket: 100 ° C. (10) Stirring power: 6. 0KW (11) Total power consumption: 11.0KW (12) Power per unit weight of dry matter: 0.367KWHr /
Kg, 316Kcal / Kg (13) Moisture of dried product: 11%
【０００９】本発明の方法により乾燥を行なう場合、乾
燥途中で被乾燥物が様々な性状に変化するので、含有水
分と性状との関係を、特に乾燥室３内で被乾燥物を強力
に撹拌した場合について調査した。その結果、含有水分
が概ね４０％以下のとき、強力な撹拌によって被乾燥物
が流動し始め、概ね３０％以下では、強力な撹拌によっ
て流動層における流動化と全く同様に流動化することが
確認された。When drying is carried out by the method of the present invention, the material to be dried changes in various properties during the drying. Therefore, the relationship between the water content and the property, particularly, the material to be dried is strongly stirred in the drying chamber 3. The case was investigated. As a result, it was confirmed that when the content of water was about 40% or less, the material to be dried began to flow by vigorous stirring, and when the content of water was about 30% or less, fluidization was performed in exactly the same way as fluidization in the fluidized bed due to strong stirring. Was done.
【００１０】次に、この強力な撹拌によって流動化した
状態を保って、減圧乾燥した場合の熱伝達について調査
した。この結果、通常、乾燥の間接加熱における総括熱
伝達関係が５０〜１００Kcal／ｍ2 Hr℃であるのに対
し、被乾燥物を流動化することにより、熱伝達は極めて
良くなり、総括熱伝達係数が４００〜５００Kcal／ｍ2
Hr℃と大幅に改善されることを発見した。Next, the heat transfer in the case of drying under reduced pressure while maintaining the fluidized state by the strong stirring was investigated. As a result, while the general heat transfer relationship in the indirect heating of drying is usually 50 to 100 Kcal / m 2 Hr ° C, the heat transfer is extremely improved by fluidizing the material to be dried, and the general heat transfer coefficient. There 400~500Kcal / m 2
Hr ° C was found to be greatly improved.
【００１１】そこで、予め乾燥済みの乾燥物と乾燥前の
被乾燥物とを、全体の含有水分が流動化可能な割合とな
るように混合槽内に入れ、強力な撹拌によって流動化し
た状態を保って減圧乾燥した結果、被乾燥物が槽内に付
着することなく、安定して効率の良い乾燥ができること
を確認した。Therefore, the dried material which has been dried in advance and the material to be dried which has not been dried are put into a mixing tank so that the total water content can be fluidized, and the fluidized state is obtained by vigorous stirring. As a result of drying under reduced pressure while keeping, it was confirmed that stable and efficient drying could be performed without the matter to be dried adhered to the tank.
【００１２】汚泥などのように水分の高い物質では、含
有水分が８０〜９０％であり、このことは乾燥後の固形
物は乾燥前の１０〜２０％の重量となり、嵩密度を考慮
した体積においても、１／６〜１／３に減量することが
解る。このことから、乾燥後の乾燥物を乾燥室３内に溜
め込むことにして、前述の乾燥処理を何回も繰返し実施
した結果、バッチ運転ではあるが、実用的な乾燥処理が
できることを確認した。A substance having a high moisture content, such as sludge, has a moisture content of 80 to 90%, which means that the solid matter after drying has a weight of 10 to 20% before drying and has a volume in consideration of bulk density. It can also be seen that the weight is reduced to 1/6 to 1/3. From this, it was confirmed that the dried product was stored in the drying chamber 3 and the drying process described above was repeatedly performed many times. As a result, it was confirmed that a practical drying process could be performed in a batch operation.
【００１３】また被乾燥物の含有水分が概ね８０％以上
の場合は、適切なポンプ９を選定すれば、気密性を保持
して乾燥室３に供給することができることを確認した。
そこで、前述のように、乾燥後の乾燥物を乾燥室３内に
溜め込むことにして、乾燥室３内の被乾燥物の含有水分
が流動化可能な割合となるように、被乾燥物の供給量を
調節して連続供給した結果、かなりの長時間連続運転が
可能であることを確認した。When the moisture content of the material to be dried is approximately 80% or more, it has been confirmed that by selecting an appropriate pump 9, it is possible to supply air to the drying chamber 3 while maintaining airtightness.
Therefore, as described above, the dried product is stored in the drying chamber 3 so that the moisture content of the dried product in the drying chamber 3 becomes a fluidizable ratio. As a result of continuous supply at a controlled amount, it was confirmed that continuous operation for a considerably long time was possible.
【００１４】以上の結果、効率が極めて高く、装置がコ
ンパクトであり、安定した連続運転が可能な減圧乾燥装
置を完成させることができた。さらに、一日程度の連続
運転が可能なため、熱エネルギーを回収して再利用する
ことが可能となり、極めて経済的な省エネルギーシステ
ムを完成させることができた。As a result, a reduced-pressure drying apparatus with extremely high efficiency, a compact apparatus, and a stable continuous operation was completed. Furthermore, since continuous operation for about one day is possible, heat energy can be recovered and reused, and a very economical energy saving system can be completed.
【００１５】本発明の利用分野としては、各種産業廃水
の汚泥処理，下水処理，し尿処理における余剰汚泥の処
理の他、現在はスプレードライヤーで乾燥されているミ
ルク，果汁その他の食品加工分野にも応用できる。また
食品加工の分野においては、熱風を用いないこと、密閉
構造であることから、衛生上好ましい処理が可能であ
り、更に乾燥機本体がコンパクトで単純な構造であるた
め、清掃を容易に行なうことができる。The field of application of the present invention is not only sludge treatment of various industrial wastewaters, treatment of excess sludge in sewage treatment and night soil treatment, but also milk, fruit juice and other food processing fields which are currently dried by a spray dryer. Can be applied. In the field of food processing, sanitary favorable treatment is possible because hot air is not used and the structure is hermetically closed. Further, the dryer body has a compact and simple structure, so it can be easily cleaned. Can be.
【００１６】[0016]
【発明の効果】本発明によれば、加熱用ジャケット１と
被乾燥物を流動化することができる撹拌羽根２とを有す
る密閉型の乾燥室３内を減圧状態に保持し、かつ被乾燥
物の含有水分を４０％以下に保持した状態で、運転中に
含有水分８０％以上の被乾燥物を供給するので、下記の
効果を奏する。 （１）乾燥室３内の被乾燥物は熱伝達の良い流動状態で
運転されるので、従来の乾燥機を使用する場合に比較し
て、乾燥装置をコンパクトにできる。 （２）熱風を用いないので、設備全体が非常にコンパク
トになり、かつ敷地面積が狭くて済む。 （３）熱風を用いないので、集塵設備や、脱臭設備を必
要としない。 （４）乾燥装置が簡単でコンパクトなため、乾燥装置の
運転が簡単である。 （５）真空乾燥であるため、乾燥温度を低くすることが
でき、乾燥装置からの熱損失が少ない。 （６）真空乾燥であるにもかかわらず連続運転が可能な
ため、熱回収システムを組込むことができる。 （７）本発明の方法において使用する乾燥装置は、従来
の乾燥設備と比較して、建設費および運転費を少なくす
ることができる。According to the present invention, the inside of a closed-type drying chamber 3 having a heating jacket 1 and a stirring blade 2 capable of fluidizing the material to be dried is kept under reduced pressure, and is dried.
During operation, keep the moisture content of the material at 40% or less.
Since the material to be dried having a water content of 80% or more is supplied,
It works. (1) Since the material to be dried in the drying chamber 3 is operated in a fluid state with good heat transfer, the drying device can be made more compact as compared with the case where a conventional dryer is used. (2) Since no hot air is used, the entire equipment is very compact and the site area is small. (3) Since hot air is not used, dust collection equipment and deodorization equipment are not required. (4) Since the drying device is simple and compact, the operation of the drying device is simple. (5) Since vacuum drying is used, the drying temperature can be lowered, and heat loss from the drying device is small. (6) Continuous operation is possible despite vacuum drying, so that a heat recovery system can be incorporated. (7) The drying apparatus used in the method of the present invention can reduce the construction cost and the operation cost as compared with the conventional drying equipment.
【図１】本発明の高水分含有物質の乾燥方法を実施する
場合に使用する装置を示す一部縦断側面図である。FIG. 1 is a partially longitudinal side view showing an apparatus used for carrying out a method for drying a substance having a high moisture content of the present invention.
１ 加熱用ジャケット ２ 撹拌羽根 ３ 乾燥室 ４ 駆動用モータ ５ 被乾燥物投入口 ６ 乾燥物取出口 ７ 蒸気抜出口 ８ ホッパー ９ ポンプ １０ 真空ポンプ １１ コンデンサー １２ 真空ポンプ DESCRIPTION OF SYMBOLS 1 Heating jacket 2 Stirrer blade 3 Drying room 4 Driving motor 5 Dry material inlet 6 Dry material outlet 7 Steam outlet 8 Hopper 9 Pump 10 Vacuum pump 11 Condenser 12 Vacuum pump
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ２６Ｂ 25/22 Ｆ２６Ｂ 25/22 Ｚ (56)参考文献 特開 平１−111497（ＪＰ，Ａ) 特開 昭61−295486（ＪＰ，Ａ) 特開 昭60−205169（ＪＰ，Ａ) 特開 平４−190084（ＪＰ，Ａ) 特開 平４−174285（ＪＰ，Ａ) 特開 昭51−104654（ＪＰ，Ａ) 実開 平１−77899（ＪＰ，Ｕ) 実開 平１−32800（ＪＰ，Ｕ) 特公 昭64−8273（ＪＰ，Ｂ２) 特公 昭56−44703（ＪＰ，Ｂ２) 実公 昭44−16877（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.7，ＤＢ名) F26B 3/04,3/20,5/04 F26B 17/18,25/22 C02F 11/12 Continuation of the front page (51) Int.Cl. 7 identification code FI F26B 25/22 F26B 25/22 Z (56) References JP-A-1-111497 (JP, A) JP-A-61-295486 (JP, A JP-A-60-205169 (JP, A) JP-A-4-190084 (JP, A) JP-A-4-174285 (JP, A) JP-A-51-104654 (JP, A) 77899 (JP, U) JP-A 1-32800 (JP, U) JP-B 64-8273 (JP, B2) JP-B 56-44703 (JP, B2) JP-B 44-16877 (JP, Y1) (58) Field surveyed (Int.Cl. 7 , DB name) F26B 3 / 04,3 / 20,5 / 04 F26B 17 / 18,25 / 22 C02F 11/12
Claims (1)
することができる撹拌羽根２とを有する密閉型の乾燥室
３内を減圧状態に保持し、かつ被乾燥物の含有水分を４
０％以下に保持した状態で、運転中に含有水分８０％以
上の被乾燥物を供給することを特徴とする高水分含有物
質の乾燥方法。 1. A closed-type drying chamber 3 having a heating jacket 1 and a stirring blade 2 capable of fluidizing an object to be dried is kept under reduced pressure, and water contained in the object to be dried is reduced to 4 %.
Keep the water content at 80% or less during operation while maintaining it at 0% or less.
High moisture content, characterized by supplying the above dried matter
Quality drying method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22092092A JP3231850B2 (en) | 1992-07-29 | 1992-07-29 | Drying method for high moisture content substances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22092092A JP3231850B2 (en) | 1992-07-29 | 1992-07-29 | Drying method for high moisture content substances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0650659A JPH0650659A (en) | 1994-02-25 |
| JP3231850B2 true JP3231850B2 (en) | 2001-11-26 |
Family
ID=16758620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22092092A Expired - Fee Related JP3231850B2 (en) | 1992-07-29 | 1992-07-29 | Drying method for high moisture content substances |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3231850B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4431851A4 (en) | 2022-04-22 | 2025-11-19 | Nara Machinery Co Ltd | PARTICLE DRYING METHOD AND METHOD FOR MANUFACTURING A DRYING DEVICE |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5644703B2 (en) | 2011-07-06 | 2014-12-24 | 新日鐵住金株式会社 | Cold rolled steel sheet manufacturing method |
-
1992
- 1992-07-29 JP JP22092092A patent/JP3231850B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5644703B2 (en) | 2011-07-06 | 2014-12-24 | 新日鐵住金株式会社 | Cold rolled steel sheet manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0650659A (en) | 1994-02-25 |
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