JPH01206980A - Fluidized bed-type drying system for food - Google Patents
Fluidized bed-type drying system for foodInfo
- Publication number
- JPH01206980A JPH01206980A JP3245788A JP3245788A JPH01206980A JP H01206980 A JPH01206980 A JP H01206980A JP 3245788 A JP3245788 A JP 3245788A JP 3245788 A JP3245788 A JP 3245788A JP H01206980 A JPH01206980 A JP H01206980A
- Authority
- JP
- Japan
- Prior art keywords
- fluidized bed
- filter
- drying
- several
- superheated steam
- 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.)
- Granted
Links
- 238000001035 drying Methods 0.000 title claims abstract description 30
- 235000013305 food Nutrition 0.000 title claims description 16
- 239000002184 metal Substances 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims 1
- 238000011001 backwashing Methods 0.000 abstract description 5
- 239000004744 fabric Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 description 6
- 238000009423 ventilation Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 230000001954 sterilising effect Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 241000588724 Escherichia coli Species 0.000 description 1
- 241000269851 Sarda sarda Species 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Drying Of Solid Materials (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
- Filtering Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は過熱蒸気を使用する流動層乾燥装置に関し、特
に乾燥室の上部に金属フィルタを取り付けて粉末状食品
の乾燥を可能にしたことを特徴とするものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a fluidized bed drying device that uses superheated steam, and in particular, a metal filter is attached to the top of the drying chamber to enable drying of powdered foods. This is a characteristic feature.
（従来の技術）
粉粒体を乾燥するには流動層乾燥装置が多く用いられる
。 流動層乾燥装置は乾燥室の底面に通気板が張られて
おり、更にこれに熱風供給ダクトが接続されていて通気
板から乾燥室に熱風を吹き上げて乾燥室内に流動層を形
成するもので、粉粒体を能率よく連続的に乾燥するに適
している。(Prior Art) Fluidized bed dryers are often used to dry powder and granular materials. A fluidized bed drying device has a ventilation plate placed on the bottom of the drying chamber, and a hot air supply duct is connected to this, and hot air is blown up from the ventilation plate into the drying chamber to form a fluidized bed inside the drying chamber. Suitable for efficient and continuous drying of powder and granular materials.
ところで、一般に流動層乾燥装置は乾燥室の上部に織布
やフェルト等を用いて形成したバグフィルタが取り付け
られていて排気ダクトに向かって上昇する軽量な粉粒体
を捕集するようになっているが、粉粒体が粉末状の食品
の場合にはフィルタバッグ内で架橋現象を作り易いため
に目、づまりを起こし易い、 殊に食品の乾燥には殺菌
のために過熱蒸気を使用するのでその傾向が著しいうえ
これらのフィルタバッグは逆洗によって目づまりした粉
粒体をを取り除くことが極めて困難であり、しかもフェ
ルト製のフィルタバッグは水洗することもできず、−旦
目づまりを起こすと再使用することが出来ない。By the way, fluidized bed dryers generally have a bag filter made of woven cloth, felt, etc. attached to the top of the drying chamber to collect lightweight powder particles that rise toward the exhaust duct. However, in the case of powdered foods, cross-linking tends to occur in the filter bag, which can easily cause clogging. This tendency is remarkable, and it is extremely difficult to remove clogged powder and granules from these filter bags by backwashing.Furthermore, felt filter bags cannot be washed with water, and once they become clogged, they cannot be reused. I can't do it.
そのため従来は食品用の流動層乾燥装置にはバグフィル
タは取り付けず、これに代えて排気経路にサイクロン集
塵器やマルチクロン集塵器を接続して排ガスと共に機外
に排出される扮粒体を捕集する方策が採られていた。Therefore, conventionally, bag filters were not installed in fluidized bed drying equipment for food products, and instead, a cyclone dust collector or multi-clone dust collector was connected to the exhaust route to prevent the granules from being discharged outside the machine together with the exhaust gas. Measures were taken to collect.
〈従来技術の問題点）
しかしながらサイクロン集塵器やマルチクロンａ塵器は
数ミクロン以下の微粉は捕集することが出来ないので、
更に後段にスクラバー等の高性能の集塵装置を備えざる
を得なかった。<Problems with conventional technology> However, cyclone dust collectors and multi-clone a dust collectors cannot collect fine powder of several microns or less.
Furthermore, it was necessary to install a high-performance dust collector such as a scrubber in the rear stage.
そのため設備費が嵩み、保守が面倒になると言゛う不具
合があった。This resulted in problems such as increased equipment costs and troublesome maintenance.
（発明め目的）
本発明は乾燥用熱風として過熱蒸気を使用した場合にも
目づまりを起こしに＜＜、逆洗をすることの出来る金属
フィルタを取り付けることを目的とする。(Purpose of the invention) The object of the present invention is to install a metal filter that can be backwashed to prevent clogging even when superheated steam is used as hot air for drying.
（発明の概要〉
本発明は線経数十〜数百マイクロメータの金属線を平織
り又は畳織りした金網を数枚重ね合）つせて金属フィル
タとし、この金属フィルタを微粉の捕集用として使用す
るため流動層乾燥装置の所定の位置に取り付けたもので
ある。(Summary of the Invention) The present invention is a metal filter made by stacking several wire meshes made by plain or tatami weaving of metal wires with a wire diameter of several tens to hundreds of micrometers, and this metal filter is used for collecting fine powder. It is installed in a predetermined position in a fluidized bed dryer for use.
（実施例）
以下１本発明を図示の実施例に基づいて具体的に説明す
る。(Example) The present invention will be specifically described below based on an illustrated example.
図は本発明に係る食品用流動層乾燥装置の概略を示すも
ので、図中符号１は乾燥機本体、２は被乾燥材料定量供
給装置、３は過熱蒸気供給装置である。The figure schematically shows a fluidized bed drying apparatus for foods according to the present invention, in which reference numeral 1 denotes the main body of the dryer, 2 a quantitative supply device for materials to be dried, and 3 a superheated steam supply device.
乾燥機本体１はフィルタ室に金属フィルタを用いて形成
した捕集装置が取り付けられている以外は通常の流動層
乾燥装置の乾燥機本体と変わるところはない。 即ち、
乾燥機本体１は流動層室４とフィルタ室５とからなり、
流動層室４には一端に被乾燥材料の投入口６が形成され
、これに被乾燥材料定量供給装置２が接続されていて流
動層室４に削り節や卯の花等の粉末状の被乾燥食品を定
量的に投入するようになっており、他端には乾燥製品の
取り出しロアが形成されていてここから乾燥された粉末
状食品を取り出すようになっている。 そして底面には
通気板８が張られいてその下に熱風供給ダクト９が形成
されており、更にこれに過熱蒸気供給装置３が接続され
ていて通気板８から流動層室４に向けて乾燥用過熱蒸気
を吹き上げるようになっている。 また、フィルタ室５
の上端には排気口１０が形成されていてここから乾燥排
ガス（過熱蒸気）を排出すると共に室内には金属フィル
タを用いて形成した捕集装置１１が取り付けられていて
乾燥排ガスに浮遊して上昇する粉末状食品を濾別して捕
集するようになっている。The dryer main body 1 is the same as the dryer main body of a normal fluidized bed dryer except that a collection device formed using a metal filter is attached to the filter chamber. That is,
The dryer main body 1 consists of a fluidized bed chamber 4 and a filter chamber 5,
The fluidized bed chamber 4 has an input port 6 for the material to be dried at one end, and a quantitative supply device 2 for the material to be dried is connected to this, and powdered foods to be dried such as bonito flakes and Unohana are fed into the fluidized bed chamber 4. It is designed to be fed quantitatively, and a dry product take-out lower is formed at the other end, from which dried powdered food is taken out. A ventilation plate 8 is placed on the bottom surface, and a hot air supply duct 9 is formed under it.A superheated steam supply device 3 is further connected to this, and air is directed from the ventilation plate 8 to the fluidized bed chamber 4 for drying. It is designed to blow up superheated steam. In addition, the filter chamber 5
An exhaust port 10 is formed at the upper end, from which dry exhaust gas (superheated steam) is discharged, and a collection device 11 formed using a metal filter is installed inside the room, so that the dry exhaust gas floats and rises. It is designed to filter and collect powdered foods.
更に詳しく説明すると、被乾燥材料定量供給袋Ｗ、２は
定量供給機１２．送りコンベヤ１３、ホッパー１４等か
ら成っていて乾燥機本体１内での処理速度に合わせて被
乾燥食品を間歇的に又は連続的にホッパー１３に供給し
、しかしてこれを乾燥機本体１に投入するようになって
いる。To explain in more detail, the drying material quantitative supply bag W, 2 is connected to the quantitative supply machine 12. It consists of a feed conveyor 13, a hopper 14, etc., and supplies the food to be dried to the hopper 13 intermittently or continuously according to the processing speed within the dryer main body 1, and then feeds it into the dryer main body 1. It is supposed to be done.
過熱蒸気供給装置３はデミスタ１５、ヒータ１６、プロ
ワ１７等から成り、デミスタ１５にはボイラ等のた気発
生装７１１８が接続されていて、蒸気発生装Ｗ＋８から
供給される蒸気を所望の温度にまで加熱して熱風供給ダ
クト９に送り込むようになっている。The superheated steam supply device 3 is made up of a demister 15, a heater 16, a blower 17, etc., and a steam generator 7118 such as a boiler is connected to the demister 15 to bring the steam supplied from the steam generator W+8 to a desired temperature. The heated air is heated up to a temperature of 100.degree. C. and sent into the hot air supply duct 9.
尚、この装置は過熱蒸気を使用するところからして全体
に断熱処理が施されていることは勿論として、乾燥機本
体１から排出される排ガスはデミスタ１５に戻して循環
使用すると共に、被乾燥材料の投入口６、乾燥製品の収
出ロア等にはロータリーバルブ２０．２１を取り付けて
外気の浸入を防ぎ、系内を３％Ｖ／Ｖ以下の低空気濃度
に保って殺菌効果を高める様になっている。Since this device uses superheated steam, the entire device is thermally insulated, and the exhaust gas discharged from the dryer body 1 is returned to the demister 15 for circulation and use. Rotary valves 20 and 21 are attached to the material input port 6, dry product output lower, etc. to prevent outside air from entering and maintain a low air concentration of 3% V/V or less in the system to increase the sterilization effect. It has become.
符号２２は予熱管であって、乾燥作業を開始する際に最
初の被乾燥食品を投入するに先立ってロータリーバルブ
２０、その他を加熱してこの部分の結露を取り除くもの
である。Reference numeral 22 denotes a preheating tube which heats the rotary valve 20 and others to remove dew condensation in this area before the first food to be dried is introduced when starting the drying operation.
ところで、金属フィルタは線径数十〜数百マイクロメー
ターの金属線を平織り又は畳織りした金網を数枚〜十数
枚積層して金網の各支点及び各層の接触点を爆接してシ
ート状にしたものである。By the way, metal filters are made by laminating several to ten wire meshes made by plain or tatami weaving metal wires with a wire diameter of several tens to several hundred micrometers, and then explosively contacting each fulcrum of the wire meshes and the contact points of each layer to form a sheet. This is what I did.
（作用）
乾燥作業を行うには、まず熱風供給ダクト９から乾燥機
本体１に向けて過熱蒸気を吹き込んで乾燥機本体１の内
壁、通気板８、金属フィルタ１１．その他を予熱し、更
にロータリーバルブ２０等を予熱してこれらに付着する
結露を取り除き、しかる後、ロータリーバルブ２０を開
けて被乾燥食品を流動層室４に投入する。(Function) To carry out the drying work, first, superheated steam is blown from the hot air supply duct 9 toward the dryer main body 1 to blow the inner wall of the dryer main body 1, the ventilation plate 8, the metal filter 11. The other components are preheated, and the rotary valve 20 and the like are preheated to remove dew condensation adhering to them, and then the rotary valve 20 is opened and the food to be dried is put into the fluidized bed chamber 4.
そして、作業の進行により金属フィルタ１１の目づまり
が進み通気性が低下したときは、作業を中断してこれを
逆洗する。 尚、この場合において逆洗用ガスは系内の
過熱蒸気を用いるのが適当である。 即ち、このように
すると操作が簡単であるばかりでなく、系内に外気が混
入しないので低空気濃度の乾燥作業を続行することが出
来、殺菌効果が持続されるのである。When the metal filter 11 becomes increasingly clogged and the air permeability decreases as the work progresses, the work is interrupted and the metal filter 11 is backwashed. In this case, it is appropriate to use superheated steam within the system as the backwashing gas. In other words, this method not only simplifies the operation, but also prevents outside air from entering the system, making it possible to continue drying with a low air concentration, thereby maintaining the sterilizing effect.
（効果）
以上詳述したように本発明は過熱蒸気を使用する食品用
流動層乾燥装置において、線経数十〜数百マイクロメー
ターの金属線を用いて平織り又は畳織りした金網を数枚
〜十数枚積層してなる金属フィルタをフィルタ室５に取
り付けたものであって、金属フィルタが耐熱、耐有機溶
剤性であるところから高温の乾燥用ガスを使用すること
ができるので、殺菌効果が要求される食品の乾燥に適し
ている。(Effects) As detailed above, the present invention is a fluidized bed drying device for food that uses superheated steam, in which several sheets of plain-woven or tatami-woven wire mesh using metal wires with a wire diameter of several tens to several hundred micrometers are used. A metal filter made of more than ten layers is attached to the filter chamber 5, and since the metal filter is heat resistant and organic solvent resistant, high temperature drying gas can be used, so the sterilization effect is improved. Suitable for required food drying.
殊に、この金属フィルタは目づまりを起こしにくく、し
かも目づまりは逆洗によって簡単に取り除くことができ
るので、乾燥用ガスとして過熱蒸気を使用することが出
来るうえ、この過熱蒸気を逆洗用ガスとしても利用する
ことが出来るので低空気濃度での乾燥が可能となり、殺
菌効果が高められるのでこの点でも粉末状の食品の乾燥
に適しているのである。In particular, this metal filter is less prone to clogging, and clogging can be easily removed by backwashing, so superheated steam can be used as drying gas, and this superheated steam can also be used as backwashing gas. It is also suitable for drying powdered foods because drying can be carried out at low air concentrations and the sterilization effect is enhanced.
また、本方法はクローズドシステムのため、その排ガス
は吹込ガスとして再度循環使用するが、この排ガスは機
内で金属フィルタを通過して清浄化されているので、吹
込ガスによるヒータの目詰まりもなく、長期間の運転に
耐えるものとなる９
因に、２ ｋｇ 、／ ｃｕｔの飽和蒸気を１２０〜１
５０℃に加熱したヒータ１６を通過させて過熱蒸気とし
、これを乾燥機本体１に吹き込むことにより装置内のエ
アをパージした後、予め造粒機で１〜４關φに造粒した
卯の花を流動層室４に投入して２０分間流動させたとこ
ろ、卯の花は含有水分が一８０％から５％に迄乾燥し、
大腸菌が２０万個／ｇがら１００個／ｇにまで減少した
。In addition, since this method is a closed system, the exhaust gas is recirculated and used as blowing gas, but this exhaust gas is purified by passing through a metal filter inside the machine, so there is no clogging of the heater due to blowing gas. 9.In order to withstand long-term operation, 2 kg/cut of saturated steam is
After passing through a heater 16 heated to 50°C to produce superheated steam and blowing it into the dryer main body 1 to purge the air inside the device, Unohana, which has been granulated in advance with a granulator to a diameter of 1 to 4 mm, is When placed in the fluidized bed chamber 4 and allowed to flow for 20 minutes, the moisture content of Unohana dried from 180% to 5%.
The number of E. coli bacteria decreased from 200,000 cells/g to 100 cells/g.
図は本発明に係る食品用流動層乾燥装置の一例を示すフ
ローシート図である。
１：乾燥機本装置 ２：定量供給装置３：過熱蒸気
供給装置 ４：流動層室
５：フィルタ室 ６：投入ロ
ア：１！出口 ８：通気板
９コ熱ｍ供給ダクト １０：排気口
１】：金属フィルタ １２二定量供給機１３：送り
コンベヤ １４：ホッパー１５：デミスタ
１６：ヒータ１７ブロワ １８：蒸気発
生装置２２：予熱管
特許出願人 株式会辻大川原製作所The figure is a flow sheet diagram showing an example of a fluidized bed drying apparatus for foods according to the present invention. 1: Dryer main device 2: Quantitative supply device 3: Superheated steam supply device 4: Fluidized bed chamber 5: Filter chamber 6: Input lower: 1! Outlet 8: Ventilation plate 9 Heat supply duct 10: Exhaust port 1]: Metal filter 12 Quantity feeder 13: Feed conveyor 14: Hopper 15: Demister
16: Heater 17 Blower 18: Steam generator 22: Preheating tube Patent applicant Tsuji Okawara Manufacturing Co., Ltd.
Claims (1)
おいて、バグフィルタは線経数十〜数百マイクロメータ
ーの金属線を平織り又は畳織りした金網を数枚〜十数枚
積層し、金網の各支点及び各層の接触点を熔着してシー
ト状にした金属フィルタを用いて形成したものであり、
流動層乾燥装置には熱風供給ダクトに過熱蒸気供給装置
が接続されていて乾燥熱媒体として過熱蒸気を使用する
ように構成されていることを特徴とする食品用流動層乾
燥装置。In a fluidized bed dryer equipped with a bag filter in the filter chamber, the bag filter is made by stacking several to ten wire meshes made of plain or tatami-woven metal wires with a wire diameter of several tens to several hundred micrometers, and each supporting point of the wire mesh is stacked. and is formed using a sheet-shaped metal filter by welding the contact points of each layer,
1. A fluidized bed drying device for foods, characterized in that the fluidized bed drying device is configured to include a superheated steam supply device connected to a hot air supply duct and to use superheated steam as a drying heat medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63032457A JP2779808B2 (en) | 1988-02-15 | 1988-02-15 | Fluidized bed dryer for food |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63032457A JP2779808B2 (en) | 1988-02-15 | 1988-02-15 | Fluidized bed dryer for food |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01206980A true JPH01206980A (en) | 1989-08-21 |
| JP2779808B2 JP2779808B2 (en) | 1998-07-23 |
Family
ID=12359502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63032457A Expired - Lifetime JP2779808B2 (en) | 1988-02-15 | 1988-02-15 | Fluidized bed dryer for food |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2779808B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5544427A (en) * | 1992-02-12 | 1996-08-13 | Henkel Kommanditgesellschaft Auf Aktien | Process for the production of granules suitable as wetting agents, detergents and/or cleaning products |
| JP2003524142A (en) * | 2000-02-25 | 2003-08-12 | グラツト ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Method for producing particulate articles |
| JP2006334511A (en) * | 2005-06-02 | 2006-12-14 | Fuji Chemical Kk | Air filter |
| CN102564069A (en) * | 2011-12-19 | 2012-07-11 | 大连兆阳软件科技有限公司 | Novel pre-crystallizer |
| CN103123204A (en) * | 2011-11-18 | 2013-05-29 | 大连得达科技发展有限公司 | Continuous type pre-crystallizer used for spinning slices |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101603555B1 (en) * | 2013-12-30 | 2016-03-15 | 조해준 | Moisture supply apparatus for powdered foods before sterilization of powdered foods |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58210810A (en) * | 1982-06-03 | 1983-12-08 | Mitsubishi Heavy Ind Ltd | Bag filter |
| JPS61246577A (en) * | 1985-04-24 | 1986-11-01 | 株式会社大川原製作所 | Continuous fluidized-bed drier incorporating bag filter |
-
1988
- 1988-02-15 JP JP63032457A patent/JP2779808B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58210810A (en) * | 1982-06-03 | 1983-12-08 | Mitsubishi Heavy Ind Ltd | Bag filter |
| JPS61246577A (en) * | 1985-04-24 | 1986-11-01 | 株式会社大川原製作所 | Continuous fluidized-bed drier incorporating bag filter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5544427A (en) * | 1992-02-12 | 1996-08-13 | Henkel Kommanditgesellschaft Auf Aktien | Process for the production of granules suitable as wetting agents, detergents and/or cleaning products |
| JP2003524142A (en) * | 2000-02-25 | 2003-08-12 | グラツト ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Method for producing particulate articles |
| JP2006334511A (en) * | 2005-06-02 | 2006-12-14 | Fuji Chemical Kk | Air filter |
| CN103123204A (en) * | 2011-11-18 | 2013-05-29 | 大连得达科技发展有限公司 | Continuous type pre-crystallizer used for spinning slices |
| CN102564069A (en) * | 2011-12-19 | 2012-07-11 | 大连兆阳软件科技有限公司 | Novel pre-crystallizer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2779808B2 (en) | 1998-07-23 |
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