JP3160903B2 - Heat sterilization method - Google Patents
Heat sterilization methodInfo
- Publication number
- JP3160903B2 JP3160903B2 JP31377190A JP31377190A JP3160903B2 JP 3160903 B2 JP3160903 B2 JP 3160903B2 JP 31377190 A JP31377190 A JP 31377190A JP 31377190 A JP31377190 A JP 31377190A JP 3160903 B2 JP3160903 B2 JP 3160903B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- solid
- sterilized
- liquid
- heat
- 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
Description
本発明は、固形物を含む液体または粘稠体の混合物か
ら成る被殺菌物をパイプ中を連続的に移送しながら、マ
イクロ波を照射して殺菌する方法に関する。The present invention relates to a method of sterilizing by irradiating a microwave while continuously transferring an object to be sterilized, which is a mixture of a liquid or a viscous body containing a solid substance, through a pipe.
液体または粘稠体から成る被殺菌物をパイプ中を移送
しながら、マイクロ波を照射して殺菌する方法は公知で
あり、実公昭63−5513号公報、特開昭62−117561号公
報、特開昭63−111870号公報等に記載されている。 これらの方法は、被殺菌物をパイプ中を移送しなが
ら、まずマイクロ波を照射して高温にし、その後、断熱
状態のホールディング部で殺菌に必要な時間高温に維持
し、最後に冷却して取り出すものである。 かかる殺菌方法は、原理上は加熱殺菌であり、十分な
殺菌効果を得るためにパイプ中を５分以上移送すること
を必要とする。A method of sterilizing a liquid or a viscous material by irradiating a microwave while transferring the material to be sterilized through a pipe is known, and is disclosed in Japanese Utility Model Publication No. Sho 63-5513, Japanese Patent Application Laid-Open No. Sho 62-117561, It is described in, for example, JP-A-63-111870. In these methods, while transferring the material to be sterilized in the pipe, first, the material is irradiated with microwaves to increase the temperature, and thereafter, the temperature is maintained at the temperature required for sterilization in the insulated holding portion, and finally cooled and removed. Things. Such a disinfection method is heat disinfection in principle, and requires transfer in a pipe for 5 minutes or more to obtain a sufficient disinfection effect.
しかしながら、被殺菌物が液体の他に固形物を含む場
合、５分以上の時間パイプ中を移送する間に固形物が沈
降し、滞留してしまう問題があった。 そこで、本発明は、固形物を含む液体からなる被殺菌
物を、パイプ中を固形物が滞留することなく移送し均一
にかつ充分殺菌する方法を提供することを目的とする。However, when the material to be sterilized contains a solid material in addition to the liquid, there is a problem that the solid material settles and stays while being transferred through the pipe for 5 minutes or more. Therefore, an object of the present invention is to provide a method of transferring a solid to be sterilized made of a liquid containing a solid without the solid remaining in the pipe and uniformly and sufficiently sterilizing the solid.
この目的達成のため、請求項１記載の発明は、径が５
〜20mmの固形物を含む、粘度が2000cp以上の液体から成
る被殺菌物をパイプ中を連続的に移送しながら、パイプ
周囲に順次設けられた、熱交換方式の予備加熱装置、マ
イクロ波加熱装置および断熱状態のホールディング部に
より加熱殺菌することを特徴とする加熱殺菌方法を提供
する。To achieve this object, the invention according to claim 1 has a diameter of 5 mm.
A heat exchange type preheating device and a microwave heating device, which are sequentially provided around the pipe while continuously transferring the material to be sterilized comprising a liquid having a viscosity of 2,000 cp or more, including a solid matter of ~ 20 mm, through the pipe. And a heat sterilization method characterized in that heat sterilization is performed by a holding part in an insulated state.
本発明にかかる被殺菌物（１）は、固形物を含む液体
から成るものである。 固形物としては食品が好ましく、通常５〜20mmのもの
である。例えば角切りの肉、グリーンピース、コーン
粒、キャロット、ポテト等が例示できる。 また、液体としては、各種調味料入のスープ、ホワイ
トソース等が使用できる。 かかる液体は、2000cp以上の粘度を有することが必要
で、好ましくは5000cp以上である。2000cpより粘度が低
い場合は、固形物が移送されずにパイプ中に滞留するこ
とがあるからである。同じく径10mmのグリーンピース、
同じく径10mmの角切りキャロット、径10mmのコーン粒の
沈降速度の実験例を第１表に示す。 かかる被殺菌物（１）は、第１図に示すように、パイ
プ（４）端部に設けられたホッパー（２）から投入し、
ポンプ（３）によりパイプ（４）なかを連続的に移送す
ることができる。 被殺菌物（１）を充分に加熱殺菌するため、パイプ
（６）、ホールディンングブ（７）が設ける必要があ
る。なお、固形物を含む被殺菌物を均一に加熱殺菌する
ため、マイクロ波加熱殺菌装置の前に予備加熱装置を配
置することが望ましい。 予備加熱装置（５）は熱交換方式によることが望まし
い。この熱交換方式による加熱においては、液体は、固
形物より加熱され易く，より高温になる。 マイクロ波加熱装置（６）は、予備加熱された液体と
固形物を殺菌に必要な温度まで加熱するものである。固
形物は、予備加熱装置（５）の加熱によって、液体より
低い温度に加熱されているが、マイクロ波による加熱効
率が良いことから、液体より高速度で昇温し、ホールデ
ィング部（７）の入口で固形物と液体は略同一温度に達
する。 予備加熱装置（５）は、例えば、パイプ（４）の周囲
に、大径のパイプを設け、加熱蒸気や熱水を通せば良
い。加熱蒸気や熱水等の熱媒体は、被殺菌物の移送方向
とは逆方向に、すなわちマイクロ波殺菌装置（６）側か
らパイプの入口に向かって通すことが、熱効率の点で好
ましい。 かかる熱媒体は、被殺菌物（１）の種類によるが、70
〜100℃のものが好ましい。熱交換の時間は、160から20
0秒を目安とすれば良い。 マイクロ波加熱殺菌装置（６）は，パイプ外部からマ
イクロ波を照射して、被殺菌物（１）自体の発熱を利用
して殺菌するものである。液体または粘稠体の温度が12
0〜140℃となるように照射すれば良い。もっとも、固形
物の温度を基準にしても同様である。両者は、略同一温
度に達するからである。一般には、2.5GHzのマイクロ波
を、出力1.3Kwで、30〜90秒照射すれば良い。 ホールディング部（７）は、高温に達した被殺菌物
（１）を、殺菌に必要な時間、高温に維持するものであ
る。パイプ（４）を断熱材料で被覆して設ければ良い。
ポールディングの時間は、10〜120秒で充分である。 第１図に示すように、ホールディング部（７）で加熱
殺菌された被殺菌物（１）は、冷却部（８）を通過した
後、取り出すことが望ましい。120℃以上に加熱された
液体または粘稠体が急激に常圧下に排出されて膨張する
ことを防ぐためである。冷却には通常100〜300秒必要と
する。The object to be sterilized (1) according to the present invention is composed of a liquid containing a solid substance. Foods are preferred as solids, usually 5 to 20 mm. For example, diced meat, green peas, corn grains, carrots, potatoes and the like can be exemplified. As the liquid, soups containing various seasonings, white sauces, and the like can be used. Such a liquid needs to have a viscosity of 2000 cp or more, and preferably 5000 cp or more. If the viscosity is lower than 2000 cp, the solid matter may stay in the pipe without being transferred. Green peas, also 10 mm in diameter,
Table 1 also shows experimental examples of the sedimentation velocity of 10 mm-diameter carrots and 10 mm-diameter cones. Such an object to be sterilized (1) is introduced from a hopper (2) provided at an end of a pipe (4) as shown in FIG.
The inside of the pipe (4) can be continuously transferred by the pump (3). In order to sufficiently heat sterilize the object (1), it is necessary to provide a pipe (6) and a holding member (7). In addition, in order to heat-sterilize an object to be sterilized including a solid substance uniformly, it is desirable to arrange a pre-heating device before the microwave heating and sterilizing device. It is desirable that the preheating device (5) is based on a heat exchange method. In the heating by the heat exchange method, the liquid is more easily heated than the solid, and becomes higher in temperature. The microwave heating device (6) heats the preheated liquid and solid to a temperature required for sterilization. The solid is heated to a temperature lower than that of the liquid by the heating of the preheating device (5). However, since the heating efficiency by the microwave is good, the temperature of the solid is increased at a higher speed than that of the liquid, and the solid portion (7) is heated. At the inlet, the solids and liquid reach approximately the same temperature. The pre-heating device (5) may be, for example, provided with a large-diameter pipe around the pipe (4) and through which heated steam or hot water is passed. It is preferable from the viewpoint of thermal efficiency that a heat medium such as heated steam or hot water is passed in a direction opposite to the transfer direction of the object to be sterilized, that is, from the side of the microwave sterilizer (6) toward the inlet of the pipe. Such a heating medium depends on the type of the object to be sterilized (1).
~ 100 ° C is preferred. Heat exchange time from 160 to 20
A good rule of thumb is 0 seconds. The microwave heating sterilizer (6) irradiates microwaves from the outside of the pipe to sterilize using the heat generated by the object (1) itself. Liquid or viscous temperature of 12
Irradiation may be performed at 0 to 140 ° C. However, the same applies to the case where the temperature of the solid is used as a reference. This is because both reach approximately the same temperature. In general, it is sufficient to irradiate a 2.5 GHz microwave at an output of 1.3 Kw for 30 to 90 seconds. The holding section (7) is for maintaining the object (1), which has reached a high temperature, at a high temperature for a time required for sterilization. The pipe (4) may be provided by covering it with a heat insulating material.
A poling time of 10 to 120 seconds is sufficient. As shown in FIG. 1, it is desirable that the object to be sterilized (1) heat-sterilized in the holding section (7) be taken out after passing through the cooling section (8). This is to prevent the liquid or viscous body heated to 120 ° C. or more from being rapidly discharged under normal pressure and expanded. Cooling usually requires 100-300 seconds.
各種固形物と第１図の装置を使用して、液体の粘度に
応じて固形物の滞留損失率を測定した。 パイプ中を移送した時間はおよそ８分であり（予備加
熱180秒、マイクロ波加熱60秒、ホールド60秒、冷却180
秒）、何れも液体及び固形物が均一且つ十分に殺菌され
ていた。 固形物 実施例１ 径約10mmのコーン 実施例２ 径約10mmのグリーンピース 実施例３ 径約10mmのキャロット 実施例４ 径約15mmの角切り牛肉 実施例５ 径約10mmの角切り牛肉 滞留損失率の結果を第２図に示す。なお、滞留損失率
とは、（投入した固形物重量−排出した固形物重量）／
（投入した固形物重量）で表される数値であり、いずれ
の固形物の結果も縦線で示す範囲に含まれた。Using the various solids and the apparatus shown in FIG. 1, the retention loss rate of the solids was measured in accordance with the viscosity of the liquid. The transfer time in the pipe is about 8 minutes (preheating 180 seconds, microwave heating 60 seconds, hold 60 seconds, cooling 180
Seconds), the liquid and solid were uniformly and sufficiently sterilized. Solids Example 1 Cone of about 10 mm in diameter Example 2 Green peas of about 10 mm in diameter Example 3 Carrot of about 10 mm in diameter Example 4 Cut beef of about 15 mm in diameter Example 5 Cut loss of cut beef of about 10 mm in diameter FIG. 2 shows the results. In addition, the retention loss rate is (weight of solids input-weight of solids discharged) /
(Weight of solids charged), and the results for all solids were included in the range indicated by the vertical line.
以上のように、本発明によれば、固形物を含む液体か
ら成る混合物を、固形物を沈降することなく、パイプ中
を移送して均一に加熱殺菌することが可能となる。 また、固形物を含む液体から成る混合物であってもを
予備加熱装置により液体が固形物がより高温に加熱さ
れ、次にマイクロ波加熱装置により高温に固形物が加熱
され、両者は略同一温度に達し、均一に加熱殺菌するこ
とができる。As described above, according to the present invention, it is possible to transfer a mixture composed of a liquid containing a solid matter through a pipe without heat to settle the solid matter, and to uniformly heat and sterilize the mixture. In addition, even in the case of a mixture composed of a liquid containing a solid, the solid is heated to a higher temperature by a preheating device, and then the solid is heated to a high temperature by a microwave heating device. And can be heat-sterilized uniformly.
第１図は本発明にかかる装置を示す説明図、第２図は実
施例における固形物と液体の昇温温度を示すグラフ。 （１）……被殺菌物、（２）……ホッパー （３）……ポンプ、（４）……パイプ （５）……予備加熱装置 （６）……マイクロ波加熱装置 （７）……ホールディング部、（８）……冷却部 （ａ）……液体、（ｂ）……5mm角の角切牛肉 （ｃ）……15mm角の角切牛肉FIG. 1 is an explanatory view showing an apparatus according to the present invention, and FIG. 2 is a graph showing the temperature of solid and liquid in the embodiment. (1)… to be sterilized, (2) hopper (3)… pump, (4)… pipe (5)… pre-heating device (6)… microwave heating device (7)… Holding part (8) Cooling part (a) Liquid (b) 5 mm square beef (c) 15 mm square beef
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) A23L 3/01 - 3/26 A61L 2/12 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) A23L 3/01-3/26 A61L 2/12
Claims (1)
cp以上の液体から成る被殺菌物をパイプ中を連続的に移
送しながら、パイプ周囲に順次設けられた、熱交換方式
の予備加熱装置、マイクロ波加熱装置および断熱状態の
ホールディング部により加熱殺菌することを特徴とする
加熱殺菌方法。1. A solid material having a diameter of 5 to 20 mm and a viscosity of 2000
While continuously transferring an object to be sterilized composed of a liquid of cp or more through the pipe, it is heated and sterilized by a pre-heating device of a heat exchange type, a microwave heating device, and a holding part in an adiabatic state, which are sequentially provided around the pipe. A heat sterilization method, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31377190A JP3160903B2 (en) | 1990-11-19 | 1990-11-19 | Heat sterilization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31377190A JP3160903B2 (en) | 1990-11-19 | 1990-11-19 | Heat sterilization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04183376A JPH04183376A (en) | 1992-06-30 |
| JP3160903B2 true JP3160903B2 (en) | 2001-04-25 |
Family
ID=18045329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31377190A Expired - Fee Related JP3160903B2 (en) | 1990-11-19 | 1990-11-19 | Heat sterilization method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3160903B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE502006007537D1 (en) * | 2005-05-23 | 2010-09-09 | Fraunhofer Ges Forschung | METHOD FOR THE EQUAL PRODUCT HEATING |
-
1990
- 1990-11-19 JP JP31377190A patent/JP3160903B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04183376A (en) | 1992-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |