JP2784505B2 - Powder sterilizer - Google Patents
Powder sterilizerInfo
- Publication number
- JP2784505B2 JP2784505B2 JP22093389A JP22093389A JP2784505B2 JP 2784505 B2 JP2784505 B2 JP 2784505B2 JP 22093389 A JP22093389 A JP 22093389A JP 22093389 A JP22093389 A JP 22093389A JP 2784505 B2 JP2784505 B2 JP 2784505B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- granular material
- pressure vessel
- stirring
- 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.)
- Expired - Lifetime
Links
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- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は飽和水蒸気を用いて粉粒体を減菌する粉粒体
の減菌装置に関する。Description: TECHNICAL FIELD The present invention relates to an apparatus for sterilizing powders and granules using sterilized steam to sterilize the powders and granules.
（従来技術） 従来より穀物や加工食品などの粉粒体を熱風や水蒸気
を用いて殺菌したり加工処理する装置が知られている
（たとえば特公平１−20859号）。(Prior Art) Conventionally, there has been known an apparatus for sterilizing or processing powder or granules such as grains and processed foods using hot air or steam (for example, Japanese Patent Publication No. 1-20859).
この種の装置においては加圧容器内で粉粒体を移送さ
せながら熱風や水蒸気を吹込むことにより加熱殺菌して
いるが、水蒸気は熱風に比べて熱容量が大きいので殺菌
効果も大きい。ところが、粉粒体の中にはたとえば小麦
粉のように殺菌のための加熱により変質してしまうおそ
れがあるものもあるために、殺菌はできるだけ低温でし
かも短時間に行うのがよい。In this type of apparatus, heat sterilization is performed by blowing hot air or steam while transferring the granular material in a pressurized container. However, steam has a larger heat capacity than hot air, and thus has a large sterilizing effect. However, since some powders may be deteriorated by heating for sterilization, such as flour, for example, sterilization should be performed at a temperature as low as possible and in a short time.
そのためには、飽和水蒸気を使用し、しかも温度を上
げるために加圧された状態で使うことが必要である。加
熱水蒸気でも多量に使えば高温にすることはできるが、
利用できる熱量が少ないのに対して飽和水蒸気では潜熱
も含めて大量の熱が利用可能である。For that purpose, it is necessary to use saturated steam and use it in a pressurized state to raise the temperature. High temperatures can be achieved by using a large amount of heated steam,
Although a small amount of heat can be used, a large amount of heat including latent heat can be used with saturated steam.
一方、減菌効果を高めるためには粉粒体と熱風や水蒸
気などの加熱媒体との接触を良好にすることが重要であ
るが、従来のこの種の減菌装置では短時間の均一加熱が
できず減菌効果が思わしくなかった。また蒸気の温度低
下に伴い生じるドレーンが機内にたまると粉体が固まっ
たりブロック化して十分な減菌ができなかった。その対
策として羽根先にスクレーパーを設けた装置もある（実
公昭63−5508号）。On the other hand, in order to enhance the sterilization effect, it is important to improve the contact between the granular material and a heating medium such as hot air or steam. The sterilization effect was not good. In addition, if the drain generated due to the decrease in the temperature of the steam accumulates in the machine, the powder hardens or blocks and the bacteria cannot be sufficiently sterilized. As a countermeasure, there is a device with a scraper at the tip of the blade (Japanese Utility Model Publication No. 63-5508).
（発明の目的および構成） 本発明は蒸気の点にかんがみてなされたもので、粉粒
体特に小麦粉、そば粉などの穀粉を変質させることなく
短時間で効果的に減菌することを目的とし、この目的を
達成するために、粉粒体を加圧下で、回転軸に対して直
角方向から見た回転軌跡がほとんど隙間なく並ぶように
配列された複数の棒状羽根により高速で撹拌しながら飽
和水蒸気と混合して加熱するように構成したものであ
る。(Objects and Configurations of the Invention) The present invention has been made in view of the point of steam, and has as its object to effectively sterilize powders, especially flour such as flour and buckwheat flour, without deteriorating them in a short time. In order to achieve this object, the powdery granules are saturated under high pressure while being stirred at high speed by a plurality of rod-shaped blades arranged such that the rotation trajectories viewed from the direction perpendicular to the rotation axis are arranged with almost no gap. It is configured to heat by mixing with steam.
（実施例） 以下本発明を図面に基づいて説明する。(Example) Hereinafter, the present invention will be described with reference to the drawings.
第１図は本発明による減菌装置の一実施例を示す。 FIG. 1 shows an embodiment of a sterilization apparatus according to the present invention.
図において、１は粉粒体を保有するホッパー、２はホ
ッパー１から供給される粉粒体を移送してミキサー３に
圧力遮断状態で左端近くに設けられた粉粒体投入口3aか
ら供給するマテリアルシールスクリューであり、ミキサ
ー３は、円筒形の加圧容器3b内に回転自在に設けられた
軸4aに撹拌羽根としてのピン4bが植設されて成る撹拌装
置４が配置された横型高速ミキサーである。加圧容器3b
の右端近くには粉粒体排出口3cが設けられ、殺菌された
粉粒体がロータリーバルブ５を介して排出されるように
なっている。In the figure, reference numeral 1 denotes a hopper holding powder and granules, and 2 transfers powder and granules supplied from the hopper 1 and supplies the powder to a mixer 3 from a powder inlet 3a provided near the left end in a pressure-cut state. The mixer 3 is a material seal screw, and the mixer 3 is a horizontal high-speed mixer in which a stirrer 4 in which a pin 4b as a stirring blade is implanted on a shaft 4a rotatably provided in a cylindrical pressure vessel 3b is arranged. It is. Pressurized container 3b
A powder outlet 3c is provided in the vicinity of the right end, and the sterilized powder is discharged via the rotary valve 5.
一方、ミキサー３の加圧容器3bの左端近くには容器3b
の接線方向に飽和水蒸気吹込口６が設けられている。飽
和水蒸気は図示しないボイラーから蒸気ヘッダを介して
供給されるようになっている。On the other hand, near the left end of the pressurized container 3b of the mixer 3, the container 3b
Is provided in the tangential direction of. Saturated steam is supplied from a boiler (not shown) via a steam header.
第１図（イ）および（ロ）からわかるように、撹拌装
置４は回転軸4aの周囲にらせん状に等間隔に多数のピン
4bが植設されて成り、回転軸4aを展開すると第２図のよ
うになる。ピン4bが並ぶ直線は第２図において回転軸4a
の軸線に垂直な線に対して10゜42′の角度をなしている
が、この角度に限定されるものではない。ピン4bは、回
転軸4aの軸線に垂直な方向（図で白矢印で示す）から見
たとき、ピン4bの回転軌跡がほとんど隙間なく並ぶよう
な間隔および本数で配列されている。As can be seen from FIGS. 1 (a) and 1 (b), the stirrer 4 is composed of a large number of pins spirally arranged at equal intervals around the rotating shaft 4a.
4b is implanted, and when the rotating shaft 4a is expanded, it becomes as shown in FIG. In FIG. 2, the straight line on which the pins 4b are arranged is the rotating shaft 4a.
Is formed at an angle of 10 ゜ 42 ′ with respect to a line perpendicular to the axis, but is not limited to this angle. The pins 4b are arranged at intervals and in numbers such that the rotation trajectories of the pins 4b are arranged almost without a gap when viewed from a direction perpendicular to the axis of the rotating shaft 4a (indicated by a white arrow in the figure).
さて、上記構成の減菌装置を用いて粉粒体を殺菌する
には、ミキサー３の撹拌装置４を高速で回転させた状態
で、ホッパー１から減菌すべき粉粒体をマテリアルシー
ルスクリュー２により加圧容器3a内に供給するととも
に、吹込口６からは飽和水蒸気を吹込む。粉粒体は撹拌
装置４により移送されながら撹拌されつつ飽和水蒸気と
まんべんなく混合され、それにより殺菌される。Now, in order to sterilize the granular material using the sterilizer having the above-described configuration, the material to be sterilized is transferred from the hopper 1 to the material seal screw 2 while the stirring device 4 of the mixer 3 is rotated at a high speed. And saturated water vapor is blown from the blowing port 6. The granular material is uniformly mixed with the saturated steam while being agitated while being transported by the agitating device 4, thereby being sterilized.
次の表は撹拌装置４を毎分800回転前後で回転させた
圧力容器3a（圧力は1.4kg/cm2）内に、平均菌数が１×1
04個/gの小麦粉を供給するとともに、飽和水蒸気を毎時
250kgの割合で吹込んで殺菌したときの菌残数を小麦粉
の容器内滞留時間すなわち減菌時間を変えて示したもの
である。なお、本発明については、飽和水蒸気の吹込口
６の向きを第１図に示すように接線方向にした。The following table shows that the average number of bacteria is 1 × 1 in the pressure vessel 3a (pressure 1.4 kg / cm 2 ) in which the stirring device 4 is rotated at about 800 rpm.
0 While supplying 4 flour / g of flour, saturated
The bacteria count when sterilized by blowing at a rate of 250 kg is shown by changing the flour residence time in the container, that is, the sterilization time. Note that, in the present invention, the direction of the saturated water vapor inlet 6 was tangential as shown in FIG.
上の表からわかるように、わずか２秒程度での殺菌時
間で菌数は約1/15に減少し、時間の経過とともに1/100
程度にまで減少する。また、減菌効果は小麦粉の容器内
滞留時間が長くなるほど高くなり、殺菌時間を７秒程度
にまで延ばすと1/300程度にまで大幅に減菌する。 As can be seen from the above table, the number of bacteria decreased to about 1/15 with a sterilization time of only about 2 seconds, and 1/100
To a degree. In addition, the sterilization effect increases as the residence time of the flour in the container increases, and when the sterilization time is extended to about 7 seconds, the bacteria are greatly reduced to about 1/300.
市販されている加熱殺菌装置の一例によれば、圧力容
器内の圧力を1Kg/cm2としてそば粉を殺菌したところ、
処理前の菌数7.5×103が60秒の処理時間で300以下にま
で減菌したとのデータが示されているが、これと比べて
も本発明による装置がいかに短時間で高い殺菌効果を上
げ得るかがわかる。これは、撹拌装置４が回転したと
き、ピン4bがあたかもらせん状の板羽根のように機能し
て容器3b内の小麦粉が残すところなくピン4bと接触する
ので撹拌が充分に行われ、容器3b内に吹込まれた飽和水
蒸気が小麦粉とまんべんなく接触する効果であると考え
られる。According to one example of the heat sterilization apparatus, which is commercially available, it was sterilized buckwheat pressure in the pressure vessel as 1Kg / cm 2,
The data shows that the number of bacteria 7.5 × 10 3 before treatment was reduced to 300 or less in a treatment time of 60 seconds, but how much the sterilization effect of the device according to the present invention is even faster in comparison with this Can be increased. This is because when the stirring device 4 is rotated, the pins 4b function as if they are spiral blades and the flour in the container 3b comes into contact with the pins 4b without leaving, so that the stirring is sufficiently performed, and the container 3b This is considered to be the effect that the saturated steam injected into the inside comes into even contact with the flour.
なお水蒸気吹込口６の向きについては、第３図に示す
ように容器の半径方向（6aで示す）より接線方向（6bで
示す）にした方が殺菌効果が高いという結果が出てい
る。As for the direction of the steam inlet 6, as shown in FIG. 3, a result that the tangential direction (shown by 6b) is higher in the tangential direction (shown by 6b) than the radial direction (shown by 6a) of the container.
上記実施例では、撹拌羽根4bとしてピンを用いたが、
ピンである必要はないものの、断面が長方形である板羽
根よりは正方形や円に近い棒状の羽根の方が高い殺菌効
果を示すことが確認された。さらに、この棒状の撹拌羽
根は粉粒体に対する撹拌機能のほかに移送機能を有する
必要があるが、そのためには実施例のように、回転軸の
周囲にらせん状に配列されるだけでなく、回転軌跡がほ
とんど隙間なく並ぶようになれば他の配列状態でもよ
い。In the above embodiment, a pin was used as the stirring blade 4b,
Although it was not necessary to use a pin, it was confirmed that a bar-shaped blade close to a square or a circle showed a higher sterilizing effect than a plate blade having a rectangular cross section. Further, the rod-shaped stirring blade needs to have a transfer function in addition to the stirring function for the powdery granules. For this purpose, not only is it arranged spirally around the rotation axis as in the embodiment, but also, Other arrangements may be used as long as the rotation trajectories are arranged with almost no gap.
ロータリーバルブでのシールはその構造上内圧が高い
場合は高圧気体（この場合飽和水蒸気）が逃げるが、飽
和水蒸気の場合はこれが結露して粉粒体を固め運転不能
になってしまうことが多い。圧力容器3bへの粉粒体の供
給に対しては特にこの傾向が強い。それに対してマテリ
アルシールスクリューを用いると、内部の水蒸気が漏れ
ないのみならず、シール部分が水分の少ない新規な粉粒
体でこすられる結果このような不都合が生ずることはな
い。When the internal pressure is high, a high-pressure gas (saturated water vapor in this case) escapes in the seal using a rotary valve. However, in the case of saturated water vapor, the vapor condenses and solidifies the powder and granules, making it impossible to operate. This tendency is particularly strong for the supply of the granular material to the pressure vessel 3b. On the other hand, when a material seal screw is used, not only does the internal water vapor not leak, but also such a disadvantage does not occur as a result of the seal portion being rubbed with a new powder having a low moisture content.
なお、この加熱処理された粉粒体は原粉粒体に比べて
当該水分が多いから乾燥工程を通して水分を調節する。
この乾燥には気流乾燥が使われる。In addition, since the heat-treated granular material has more moisture than the raw granular material, the moisture is adjusted through a drying process.
Flash drying is used for this drying.
（発明の効果） 以上説明したように、本発明においては、粉粒体を加
圧下で、回転軸に対して直角方向から見た回転軌跡がほ
とんど隙間なく並ぶように配列された複数の棒状羽根に
より撹拌しながら飽和水蒸気と混合して加熱するように
構成したので、粉粒体が飽和水蒸気と充分に且つ均一に
混合されて短時間で高い殺菌効果が得られる。(Effects of the Invention) As described above, in the present invention, a plurality of rod-shaped blades are arranged such that the rotation trajectories viewed from the direction perpendicular to the rotation axis are arranged with almost no gap under pressure on the granular material. As a result, the powder is mixed with the saturated steam and heated sufficiently, so that a high sterilizing effect can be obtained in a short time.
一方加熱に使用された水蒸気は水分となって粉粒体中
に添加されるが、このとき撹拌の効果によりかたまりや
ブロックにならず均一に添加される。したがって機能が
汚れたりすることがなくスムーズな連続運転ができる。On the other hand, the water vapor used for heating becomes water and is added to the granules, but at this time, it is uniformly added without forming clumps or blocks due to the effect of stirring. Therefore, smooth continuous operation can be performed without the function becoming dirty.
第１図（イ）および（ロ）は本発明による粉粒体の減菌
装置の一実施例の概略的側面図および端面図、第２図は
撹拌羽根の展開図、第３図は圧力容器に対する水蒸気吹
込口の位置を示す線図である。 １……ホッパー、２……マテリアルシールスクリュー、
３……ミキサー、3a……投入口、3b……圧力容器、3c…
…排出口、４……撹拌装置、4a……回転軸、4b……ピン1 (a) and 1 (b) are a schematic side view and an end view of an embodiment of the apparatus for sterilizing a granular material according to the present invention, FIG. 2 is a development view of a stirring blade, and FIG. 3 is a pressure vessel. FIG. 3 is a diagram showing a position of a steam inlet with respect to FIG. 1 ... hopper, 2 ... material seal screw,
3 ... Mixer, 3a ... Inlet, 3b ... Pressure vessel, 3c ...
... Outlet, 4 ... Stirring device, 4a ... Rotary shaft, 4b ... Pin
Claims (2)
くに粉粒体の排出口を有し、飽和水蒸気の吹込口を有す
る円筒形圧力容器と、該圧力容器内に配置され前記投入
口から投入された粉粒体を撹拌しながら前記排出口に向
けて移送する撹拌手段とを備え、前記撹拌手段は、回転
軸上に円筒内径に近い寸法の複数の棒状羽根を、周囲に
ラセン状に植設し回転軸に対して直角方向から見た該棒
状羽根の回転軌跡が回転軸の軸方向にほとんど隙間なく
並ぶように配列して成ることを特徴とする粉粒体の減菌
装置。1. A cylindrical pressure vessel having a powder inlet near one end, a powder outlet near the other end, and having a saturated steam inlet, and a pressure vessel inside the pressure vessel. Stirring means for stirring and transferring the granular material input from the input port toward the discharge port while stirring, the stirring means including a plurality of rod-shaped blades having a size close to the inner diameter of the cylinder on the rotating shaft. Characterized by being arranged so that the rotation trajectories of the rod-shaped blades, which are helically implanted around the circumference and viewed from a direction perpendicular to the rotation axis, are arranged in the axial direction of the rotation axis with almost no gap. Sterilizer.
ューを介して前記圧力容器の粉粒体投入口に供給される
ようにした請求項１に記載の粉粒体の減菌装置。2. The apparatus for sterilizing powder and granular material according to claim 1, wherein the powder and granular material before sterilization is supplied to the powder and granular material inlet of the pressure vessel via a material seal screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22093389A JP2784505B2 (en) | 1989-08-28 | 1989-08-28 | Powder sterilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22093389A JP2784505B2 (en) | 1989-08-28 | 1989-08-28 | Powder sterilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0383567A JPH0383567A (en) | 1991-04-09 |
| JP2784505B2 true JP2784505B2 (en) | 1998-08-06 |
Family
ID=16758832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22093389A Expired - Lifetime JP2784505B2 (en) | 1989-08-28 | 1989-08-28 | Powder sterilizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2784505B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007125006A (en) * | 2005-10-04 | 2007-05-24 | Nisshin Flour Milling Inc | Wheat flour for breadmaking and method for producing the same |
| JP2015181463A (en) * | 2014-03-26 | 2015-10-22 | 株式会社日清製粉グループ本社 | Method for producing heat-treated cereal whole granule |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3941903B2 (en) * | 1998-10-30 | 2007-07-11 | ヱスビー食品株式会社 | Continuous stirring and sterilizing equipment for powder |
| JP2010166855A (en) * | 2009-01-22 | 2010-08-05 | Toshihiko Hanai | Processing method for long storage of cereal, cereals processed to be storable for long, and processing apparatus for long storage of cereal |
| ES2710077B2 (en) * | 2017-10-17 | 2020-03-05 | Incus Tech S L | Pasteurization procedure and apparatus |
| JP6997414B2 (en) * | 2018-04-06 | 2022-01-17 | 株式会社サタケ | Rotating shaft for superheated steam sterilizer and superheated steam sterilizer |
-
1989
- 1989-08-28 JP JP22093389A patent/JP2784505B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007125006A (en) * | 2005-10-04 | 2007-05-24 | Nisshin Flour Milling Inc | Wheat flour for breadmaking and method for producing the same |
| JP4653050B2 (en) * | 2005-10-04 | 2011-03-16 | 日清製粉株式会社 | Bread flour composition and method for producing the same |
| JP2015181463A (en) * | 2014-03-26 | 2015-10-22 | 株式会社日清製粉グループ本社 | Method for producing heat-treated cereal whole granule |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0383567A (en) | 1991-04-09 |
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