JP4198127B2 - Granular material sterilizer - Google Patents

Granular material sterilizer Download PDF

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JP4198127B2
JP4198127B2 JP2005155370A JP2005155370A JP4198127B2 JP 4198127 B2 JP4198127 B2 JP 4198127B2 JP 2005155370 A JP2005155370 A JP 2005155370A JP 2005155370 A JP2005155370 A JP 2005155370A JP 4198127 B2 JP4198127 B2 JP 4198127B2
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granular material
perforated drum
positive pressure
outer cylinder
pressure gas
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JP2006325510A (en
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哲郎 原田
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IHI Inspection and Instrumentation Co Ltd
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Description

本発明は、食品の原材料として使用される大豆、米、麦、トウモロコシ等の穀物或いはその他の粒状物を、簡略な装置構成によって均一且つ高能率に殺菌できるようにした粒状物殺菌装置に関する。   The present invention relates to a granular material sterilizer that can sterilize grains such as soybeans, rice, wheat, corn, or other granular materials used as food raw materials uniformly and efficiently with a simple apparatus configuration.

従来より、大豆、米、麦、トウモロコシ等の穀物或いはその他の粒状物を殺菌する方法としては、粒状物の澱粉、蛋白質等を変性させない条件で粒状物に高温空気又は過熱蒸気を吹付け、これにより、粒状物の表面及び表皮裏側のごく表層部分に存在している微生物を殺菌する方法が一般に用いられている。この時、３００〜６００℃前後の高温空気又は過熱蒸気を２〜３秒間粒状物に接触させることで殺菌できることが知られている。尚、上記殺菌によると粒状物に混入する種々の虫等の殺虫も同時に行うことができる。   Conventionally, as a method of sterilizing grains such as soybeans, rice, wheat, corn or other granular materials, hot air or superheated steam is sprayed on the granular materials under conditions that do not denature the starch, proteins, etc. of the granular materials. In general, a method of sterilizing microorganisms present on the surface of the granular material and the very surface layer portion on the back side of the skin is generally used. At this time, it is known that high temperature air of about 300 to 600 ° C. or superheated steam can be sterilized by contacting the granular material for 2 to 3 seconds. In addition, according to the said sterilization, insecticides, such as various insects mixed in a granular material, can also be performed simultaneously.

しかし、高温空気又は過熱蒸気を用いて粒状物の確実な殺菌を行うには、粒状物の個々の表面に対して高温空気又は過熱蒸気が満遍なくしかも所定の時間を保持して接触する必要がある。   However, in order to reliably sterilize the granular material using high-temperature air or superheated steam, it is necessary that the high-temperature air or superheated steam contacts the individual surfaces of the granular material uniformly and for a predetermined time. .

このために従来では、コンベヤ上などに粒状物を薄く層状に延ばし、その上部から高温空気又は過熱蒸気を吹付けることが一般に行われていた。しかしこの方法では、粒状物の陰になった裏側表層部分の殺菌が不十分になる問題がある。更にこの方法は、大量の粒状物を高能率で殺菌するには不向きであった。   For this reason, conventionally, it has been generally performed that a granular material is thinly layered on a conveyor or the like and hot air or superheated steam is sprayed from the upper part thereof. However, in this method, there is a problem that the sterilization of the surface layer on the back side which is behind the granular material becomes insufficient. Furthermore, this method is not suitable for sterilizing a large amount of granular materials with high efficiency.

また、従来の他の方法としては、粒状物を落下させながら高温空気又は過熱蒸気を吹付けて粒状物を殺菌する方法が試みられている。しかし、この方法では粒状物の落下速度が早いために、粒状物と高温空気又は過熱蒸気との接触が瞬間的であって十分な接触時間を保持することができないために殺菌が不十分になる可能性がある。また、粒状物の落下高さを高くすれば接触時間を長くすることはできるが、このようにした場合には装置の機高が大型化してしまう問題がある。従って、この方法も大量の粒状物を高能率で殺菌するには不向きであった。   Moreover, as another conventional method, a method of sterilizing the granular material by spraying high-temperature air or superheated steam while dropping the granular material has been attempted. However, in this method, since the falling speed of the particulate matter is high, the contact between the particulate matter and the hot air or superheated steam is instantaneous, so that sufficient contact time cannot be maintained, and sterilization becomes insufficient. there is a possibility. Further, if the drop height of the granular material is increased, the contact time can be lengthened, but in this case, there is a problem that the height of the apparatus is increased. Therefore, this method is also unsuitable for sterilizing a large amount of granular materials with high efficiency.

一方、上部から落下供給した粒状物を、下部から供給した上昇気流によって浮遊泳動させ、このようにして浮遊泳動させた粒状物に側方から低エネルギーの電子線を照射することによって粒状物の殺菌を行うようにした装置は、特許文献１に示されている。
特開２００２−３０６１４３号公報 On the other hand, the granular material dropped and supplied from the upper part is floated and moved by the rising air current supplied from the lower part. An apparatus configured to perform the above is disclosed in Patent Document 1.
JP 2002-306143 A

しかしながら、特許文献１に示す装置は、粒状物を均一に殺菌することが困難であり、また、大量の粒状物を高能率で殺菌することが困難である。   However, it is difficult for the apparatus shown in Patent Document 1 to uniformly sterilize granular materials, and to sterilize a large amount of granular materials with high efficiency.

即ち、特許文献１では、上部から供給した粒状物を、下部から供給する上昇気流によってゆっくり浮遊下降させて、下部の取出し口から排出する必要がある。このため、安定した浮遊泳動を得るには、上昇気流の吹き出し圧力と粒状物の供給量とを精度良く制御する必要があるが、このように上昇気流の吹き出し圧力と粒状物の供給量とを精度良く制御したとしても、上昇気流は上部から落下してくる粒状物によって乱れ、このために粒状物は連なって（固まって）部分的に落下し易くなるため、安定した浮遊泳動は得難い問題がある。また、粒状物は上昇気流が弱くなる壁面近傍や隅部に沿って落下し易いという問題がある。   That is, in Patent Document 1, it is necessary that the granular material supplied from the upper part is slowly suspended and lowered by the ascending air current supplied from the lower part and discharged from the lower outlet. For this reason, in order to obtain stable floating migration, it is necessary to accurately control the blowing pressure of the updraft and the supply amount of the granular material. Even if controlled accurately, the ascending air current is disturbed by the granular material falling from the upper part, and this makes it easy to obtain stable floating electrophoresis because the granular material is easily linked (set) and partially dropped. is there. Further, there is a problem that the granular material easily falls along the vicinity of the wall surface or the corner portion where the ascending air current becomes weak.

このように粒状物を均一に浮遊泳動させることが難しいために、特許文献１では粒状物を均一に殺菌することが難しかった。   In this way, it is difficult to uniformly float and migrate the particulate matter, and in Patent Document 1, it is difficult to sterilize the particulate matter uniformly.

また、特許文献１は公報中にも記載されているように、低エネルギーの電子線を照射する場合、影にかくれた粒状物は十分に殺菌されない可能性があるため、この問題を解消するには浮遊泳動の層厚を薄くする必要があるが、このように層厚を薄くすると多量の粒状物を同時に処理しようとした場合には装置の幅寸法を大きくする必要があり、よって装置が大型になって大量の粒状物を高能率で殺菌処理するには不向きであった。   In addition, as described in Japanese Patent Laid-Open Publication No. 2003-259542, when irradiating a low-energy electron beam, the granular material hidden in the shadow may not be sufficiently sterilized. It is necessary to reduce the layer thickness of stray electrophoresis. However, if the layer thickness is reduced in this way, it is necessary to increase the width of the device when trying to process a large amount of granular materials at the same time. Therefore, it was not suitable for sterilizing a large amount of granular materials with high efficiency.

本発明は、上記実情に鑑みてなしたもので、簡略な装置構成によって大量の粒状物を均一且つ高能率に殺菌できるようにした粒状物殺菌装置を提供しようとするものである。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a granular material sterilization apparatus that can sterilize a large amount of granular material uniformly and efficiently with a simple apparatus configuration.

本発明は、殺菌する粒状物が通過できない小孔を周面に有して１方向に回転する多孔ドラムと、該多孔ドラムの周面と所要の間隔を隔てて多孔ドラムを包囲する外筒と、該外筒の下部に形成した粒状物取出口と、前記外筒の上部に形成した高温気体供給口と、前記多孔ドラムの周面が回転により上側に向う側部において前記間隔に対し上側のみが開口して連通するよう外筒に固定した粒状物供給口と、前記多孔ドラムの内部を吸引する負圧発生装置と、前記多孔ドラムの下側内面に接近配置して前記多孔ドラムの下側内面に向けて正圧ガスを噴出する正圧ガス供給ダクトとを備えたことを特徴とする粒状物殺菌装置、に係るものである。 The present invention relates to a perforated drum that rotates in one direction with a small hole on the peripheral surface through which particulate matter to be sterilized cannot pass, and an outer cylinder that surrounds the perforated drum with a predetermined distance from the peripheral surface of the perforated drum. The granular material outlet formed in the lower part of the outer cylinder, the high-temperature gas supply port formed in the upper part of the outer cylinder, and only the upper side with respect to the interval in the side part where the peripheral surface of the perforated drum faces upward by rotation. A granular material supply port fixed to the outer cylinder so as to open and communicate, a negative pressure generator for sucking the inside of the perforated drum, and a lower inner surface of the perforated drum arranged close to the lower inner surface of the perforated drum The present invention relates to a granular material sterilization apparatus comprising a positive pressure gas supply duct for ejecting a positive pressure gas toward the surface.

上記手段において、前記負圧発生装置から排出される正圧ガスを前記正圧供給ダクトに導くようにすることは好ましい。   In the above means, it is preferable that the positive pressure gas discharged from the negative pressure generator is guided to the positive pressure supply duct.

上記手段において、前記多孔ドラムを貫通して設けた固定軸に前記正圧供給ダクトを固定し、且つ、前記固定軸に、前記負圧発生装置に連通する吸引流路と、前記正圧ガス供給ダクトに連通する正圧ガス流路を備えることは好ましい。   In the above means, the positive pressure supply duct is fixed to a fixed shaft provided through the perforated drum, and a suction flow path communicating with the negative pressure generator is connected to the fixed shaft, and the positive pressure gas supply It is preferable to provide a positive pressure gas flow path communicating with the duct.

上記手段によれば、以下のような作用が得られる。   According to the above means, the following operation can be obtained.

本発明の粒状物殺菌装置では、殺菌する粒状物が通過できない小孔を周面に有して１方向に回転する多孔ドラムの内部を負圧発生装置に連通して吸引しているため、高温気体供給口から多孔ドラムと外筒との間隔に供給する高温気体は、多孔ドラムの各小孔から多孔ドラム内に吸引される。従って、粒状物供給口に粒状物を供給すると、粒状物は前記小孔から吸引される高温気体の吸引力によって多孔ドラムの外周面に層状に吸着されて移動するが、この時、粒状物はその外周面を常時流動する高温気体によって多孔ドラムに吸着されることになるため、粒状物と高温気体との接触が高まり、よって粒状物は均一且つ高能率に殺菌される。 In the granular material sterilization apparatus of the present invention, the inside of the perforated drum rotating in one direction having a small hole through which the granular material to be sterilized cannot pass cannot be communicated with the negative pressure generator and sucked. The high temperature gas supplied from the gas supply port to the space between the perforated drum and the outer cylinder is sucked into the perforated drum from each small hole of the perforated drum. Therefore, when the granular material is supplied to the granular material supply port, the granular material is adsorbed and moved in layers on the outer peripheral surface of the perforated drum by the suction force of the high-temperature gas sucked from the small holes. Since the outer peripheral surface is adsorbed to the perforated drum by the high-temperature gas that always flows, the contact between the granular material and the high-temperature gas is increased, so that the granular material is sterilized uniformly and efficiently.

多孔ドラムの外周に吸着された粒状物が、多孔ドラムの回転により正圧ガス供給ダクトの下部位置に到達すると、多孔ドラムに吸着されていた粒状物は吸引力を失うと共に正圧ガス供給ダクト内部の正圧によって押されることにより粒状物取出口に落下する。   When the particulate matter adsorbed on the outer periphery of the perforated drum reaches the lower position of the positive pressure gas supply duct due to the rotation of the perforated drum, the particulate matter adsorbed on the perforated drum loses the suction force and the inside of the positive pressure gas supply duct It is dropped to the particulate matter outlet by being pushed by the positive pressure.

従って、前記多孔ドラムの回転速度を調節することにより、粒状物を高温気体に接触させる殺菌時間を任意に調整することができる。   Therefore, by adjusting the rotational speed of the perforated drum, the sterilization time for bringing the granular material into contact with the high-temperature gas can be arbitrarily adjusted.

本発明の粒状物殺菌装置によれば、殺菌する粒状物が通過できない小孔を周面に有して回転する多孔ドラムの小孔から多孔ドラム内に高温気体を吸引することにより多孔ドラムの周面に粒状物を層状に吸着するようにしたので、粒状物はその外周面を常時流動する高温気体によって多孔ドラムに吸着されることになり、よって、粒状物と高温気体との接触が高まり、粒状物を均一且つ高能率に殺菌できるという優れた効果を有する。 According to the granular material sterilization apparatus of the present invention, the periphery of the perforated drum is obtained by sucking high temperature gas into the perforated drum from the small perforations of the rotating perforated drum having a small hole on the peripheral surface through which the particulate matter to be sterilized cannot pass. Since the particulate matter is adsorbed in layers on the surface, the particulate matter is adsorbed to the porous drum by the high-temperature gas that constantly flows on the outer peripheral surface thereof, and thus the contact between the particulate matter and the high-temperature gas is increased, It has the outstanding effect that a granular material can be disinfected uniformly and highly efficiently.

更に、多孔ドラムの回転速度を調節することにより、粒状物を高温気体に接触させる殺菌時間を任意に調整できるという優れた効果を有する。   Furthermore, it has the outstanding effect that the sterilization time which makes a granular material contact high temperature gas can be adjusted arbitrarily by adjusting the rotational speed of a perforated drum.

以下、本発明の実施の形態を添付図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

図１は本発明を実施する形態の一例を示す全体概略側面図、図２は図１のＩＩ−ＩＩ方向矢視図である。図１、図２中、１は周面に多数の小孔２を有する多孔ドラムであり、該多孔ドラム１は筒状周面との間に所要の間隔Ｓを保持するようにした外筒３によって包囲されている。前記多孔ドラム１の周面に形成する小孔２は、大豆、米、麦、トウモロコシ等の穀物或いはその他の粒状物が通過できない適宜の大きさに形成している。   1 is an overall schematic side view showing an example of an embodiment of the present invention, and FIG. 2 is a view taken in the direction of arrows II-II in FIG. 1 and 2, reference numeral 1 denotes a perforated drum having a large number of small holes 2 on the peripheral surface, and the perforated drum 1 has an outer cylinder 3 that maintains a required interval S between the perforated drum 1 and the cylindrical peripheral surface. Besieged by. The small holes 2 formed on the peripheral surface of the perforated drum 1 are formed in an appropriate size that cannot pass grains such as soybean, rice, wheat, corn, or other granular materials.

前記多孔ドラム１の長手方向一端の軸中心には、外筒３を貫通し且つシール機能を有する軸受４により外筒３に対して回転可能に支持された軸５が固定されており、該軸５の端部に設けたプーリ或いはホイール等の回転従動部６が、伝達部材７を介して回転駆動装置８（モータ）に接続されている。前記多孔ドラム１の他端の軸中心には、前記外筒３に固定した固定軸９が貫通しており、前記多孔ドラム１の他端はシール機能を有する軸受１０によって固定軸９に回転可能に支持されている。   A shaft 5 that is rotatably supported with respect to the outer cylinder 3 by a bearing 4 that penetrates the outer cylinder 3 and has a sealing function is fixed to the axial center of one end in the longitudinal direction of the perforated drum 1. A rotation follower 6 such as a pulley or a wheel provided at an end of 5 is connected to a rotation drive device 8 (motor) via a transmission member 7. A fixed shaft 9 fixed to the outer cylinder 3 passes through the axial center of the other end of the porous drum 1, and the other end of the porous drum 1 can be rotated to the fixed shaft 9 by a bearing 10 having a sealing function. It is supported by.

前記外筒３の下部には粒状物取出口１１が設けられている。この時、外筒３の下面は粒状物取出口１１に向けて下り勾配に形成されていることが好ましい。また、前記外筒３の上部には高温空気又は過熱蒸気等の高温気体を供給するための高温気体供給装置１２に接続された高温気体供給口１３が設けられている。   A granular material outlet 11 is provided at the lower part of the outer cylinder 3. At this time, it is preferable that the lower surface of the outer cylinder 3 is formed in a downward gradient toward the granular material outlet 11. A high-temperature gas supply port 13 connected to a high-temperature gas supply device 12 for supplying high-temperature gas such as high-temperature air or superheated steam is provided at the top of the outer cylinder 3.

更に、前記多孔ドラム１の周面が回転により上側に向う側部（図２で反時計回りに回転する多孔ドラム１の右側）には、前記多孔ドラム１と外筒３との間隔Ｓに対して上側のみが開口１４して連通するように外筒３に固定した粒状物供給口１５を設けている。図中１６は粒状物供給口１５の粒状物受ホッパ１５ａに大豆、米、麦、トウモロコシ等の穀物或いはその他の粒状物を供給する搬送装置である。   Further, the side portion of the perforated drum 1 facing upward by rotation (on the right side of the perforated drum 1 rotating counterclockwise in FIG. 2) has a gap S between the perforated drum 1 and the outer cylinder 3. A granular material supply port 15 fixed to the outer cylinder 3 is provided so that only the upper side opens and communicates. In the figure, reference numeral 16 denotes a conveying device for supplying grains such as soybean, rice, wheat, corn, or other granular materials to the granular material receiving hopper 15a of the granular material supply port 15.

前記粒状物供給口１５は、前記多孔ドラム１の周面が回転により上側に向う側部（図２では右側）の高温気体供給口１３と粒状物取出口１１との間であれば任意の位置に設置することができる。この時、前記粒状物取出口１１と粒状物供給口１５との間の外筒３は、多孔ドラム１との間隔を極力小さくするように多孔ドラム１に接近させた周壁部１７を形成している。   The granular material supply port 15 is located at any position as long as it is between the high temperature gas supply port 13 and the granular material outlet port 11 on the side (the right side in FIG. 2) whose peripheral surface of the perforated drum 1 faces upward by rotation. Can be installed. At this time, the outer cylinder 3 between the granular material outlet 11 and the granular material supply port 15 forms a peripheral wall portion 17 that is close to the porous drum 1 so as to make the gap between the porous drum 1 as small as possible. Yes.

前記多孔ドラム１の内部には、該多孔ドラム１の下側内面に接近して多孔ドラム１の下側内面に向けて正圧ガスを噴出するように下側が開放された正圧ガス供給ダクト１８が配置されており、該正圧ガス供給ダクト１８は支持部材１９により前記固定軸９に固定している。   Inside the perforated drum 1, a positive pressure gas supply duct 18 whose lower side is opened so as to approach the lower inner surface of the perforated drum 1 and eject a positive pressure gas toward the lower inner surface of the perforated drum 1. The positive pressure gas supply duct 18 is fixed to the fixed shaft 9 by a support member 19.

更に、前記固定軸９は筒体により形成されており内部には上側の吸入流路２１と下側の正圧ガス流路２５とに区画する仕切板９ａが設けられている。前記吸入流路２１は固定軸９の上側外面に形成した吸入口２０により多孔ドラム１の内部と連通しており、前記吸引流路２１の端部は吸引管２２により外筒３の外部に設けた負圧発生装置２３に接続している。   Furthermore, the fixed shaft 9 is formed of a cylindrical body, and a partition plate 9a is provided in the interior, which is divided into an upper suction passage 21 and a lower positive pressure gas passage 25. The suction channel 21 communicates with the inside of the porous drum 1 by a suction port 20 formed on the upper outer surface of the fixed shaft 9, and the end of the suction channel 21 is provided outside the outer cylinder 3 by a suction tube 22. The negative pressure generator 23 is connected.

また、前記支持部材１９には、前記正圧ガス流路２５と正圧ガス供給ダクト１８の下面に開口したガス供給口２４とに連通する流路２５ａが形成してあり、前記正圧ガス流路２５の端部は調整弁２６を有するガス取入管２７により前記負圧発生装置２３の排気管２８に接続している。図中２９は殺菌処理した粒状物を受ける容器である。   Further, the support member 19 is formed with a flow path 25a communicating with the positive pressure gas flow path 25 and a gas supply port 24 opened on the lower surface of the positive pressure gas supply duct 18, and the positive pressure gas flow The end of the passage 25 is connected to the exhaust pipe 28 of the negative pressure generator 23 by a gas intake pipe 27 having a regulating valve 26. In the figure, 29 is a container for receiving the sterilized granular material.

尚、前記多孔ドラム１の内部を吸引する方法、及び正圧ガス供給ダクト１８に正圧ガスを供給する方法には、前記図示例以外にも種々の方法を採用することができる。   Various methods other than the illustrated example can be adopted as a method of sucking the inside of the porous drum 1 and a method of supplying the positive pressure gas to the positive pressure gas supply duct 18.

次に、上記図示例の作動を説明する。   Next, the operation of the illustrated example will be described.

図１、図２の粒状物殺菌装置では、回転駆動装置８を駆動して多孔ドラム１を回転し、高温気体供給装置１２により例えば３００〜６００℃前後に加熱された高温気体を高温気体供給口１３から多孔ドラム１と外筒３との間の間隔Ｓに供給し、負圧発生装置２３を駆動することにより、吸引流路２１及び吸引口２０を介して多孔ドラム１内部のガスを吸引し、同時に、負圧発生装置２３の排気管２８に接続されたガス取入管２７により前記負圧発生装置の正圧ガスである排気を、調整弁２６、固定軸９の正圧ガス流路２５及び支持部材１９の流路２５ａとガス供給口２４を介して、正圧ガス供給ダクト１８の下側内部に供給する。   In the granular material sterilizer of FIGS. 1 and 2, the rotary drive device 8 is driven to rotate the porous drum 1, and the high-temperature gas heated to about 300 to 600 ° C. by the high-temperature gas supply device 12 is supplied to the high-temperature gas supply port. 13 is supplied to the interval S between the perforated drum 1 and the outer cylinder 3, and the negative pressure generator 23 is driven to suck the gas inside the perforated drum 1 through the suction flow path 21 and the suction port 20. At the same time, the gas intake pipe 27 connected to the exhaust pipe 28 of the negative pressure generating device 23 allows the exhaust gas, which is the positive pressure gas of the negative pressure generating device, to flow through the regulating valve 26, the positive pressure gas flow path 25 of the fixed shaft 9, and The gas is supplied to the lower inside of the positive pressure gas supply duct 18 through the flow path 25 a of the support member 19 and the gas supply port 24.

この状態で粒状物供給口１５に粒状物を供給すると、粒状物は回転する多孔ドラム１の小孔２から吸引される高温気体の吸引力によって多孔ドラム１の外周面に層状に吸着されて移動する。この時、前記負圧発生装置２３による吸引力は、粒状物の種類などに応じて調整することができ、吸引力を調整することにより多孔ドラム１の周面に吸着される粒状物の層厚を設定・調整することができる。   When the granular material is supplied to the granular material supply port 15 in this state, the granular material is adsorbed and moved in layers on the outer peripheral surface of the porous drum 1 by the suction force of the high temperature gas sucked from the small holes 2 of the rotating porous drum 1. To do. At this time, the suction force by the negative pressure generator 23 can be adjusted according to the type of the granular material, and the layer thickness of the granular material adsorbed on the peripheral surface of the porous drum 1 by adjusting the suction force. Can be set and adjusted.

前記粒状物は、該粒状物の外周面を流動して小孔２に吸引される高温気体によって多孔ドラム１に吸着されることになるため、粒状物の外周面には常時高温流体が流動することになって粒状物と高温気体との接触が高まり、よって粒状物は均一且つ高能率に殺菌される。また、上記殺菌により粒状物に混入する種々の虫等は確実に殺虫される。   Since the granular material is adsorbed to the perforated drum 1 by the high-temperature gas flowing on the outer peripheral surface of the granular material and sucked into the small holes 2, a high-temperature fluid always flows on the outer peripheral surface of the granular material. In particular, the contact between the granular material and the high temperature gas is increased, so that the granular material is uniformly and efficiently sterilized. In addition, various insects and the like mixed in the granular material by the sterilization are surely killed.

多孔ドラム１の回転によって多孔ドラム１の外周に吸着された粒状物が正圧ガス供給ダクト１８の下部位置に到達すると、粒状物に作用していた吸引力が失われると共に正圧ガス供給ダクト１８内部の正圧ガスによって内側から押され、これによって粒状物は多孔ドラム１から確実に離反して粒状物取出口１１に落下する。   When the granular material adsorbed on the outer periphery of the porous drum 1 by the rotation of the porous drum 1 reaches the lower position of the positive pressure gas supply duct 18, the suction force acting on the granular material is lost and the positive pressure gas supply duct 18. It is pushed from the inside by the internal positive pressure gas, whereby the particulate matter is reliably separated from the perforated drum 1 and falls to the particulate matter outlet 11.

高温気体供給口１３に供給される高温気体が例えば３００〜６００℃前後の温度に設定されている場合には、高温気体と粒状物とが２〜３秒の接触時間となるように、多孔ドラム１の回転速度を設定する。即ち、前記多孔ドラム１は、粒状物の種類、負圧発生装置２３の吸引力による粒状物の層厚の大きさ、高温気体の温度・流量等に応じて、粒状物と高温気体の接触時間が好適になるように回転速度を設定することができ、これによって粒状物を常に均一且つ高能率に殺菌することが可能になる。   When the high-temperature gas supplied to the high-temperature gas supply port 13 is set to a temperature of about 300 to 600 ° C., for example, the perforated drum so that the high-temperature gas and the granular material have a contact time of 2 to 3 seconds. Set the rotation speed of 1. That is, the porous drum 1 has a contact time between the granular material and the high temperature gas according to the type of the granular material, the layer thickness of the granular material by the suction force of the negative pressure generator 23, the temperature / flow rate of the high temperature gas, and the like. The rotational speed can be set so as to be suitable, and this makes it possible to always sterilize the granular material uniformly and efficiently.

なお、本発明の粒状物殺菌装置は、上記形態例にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。   In addition, the granular material sterilizer of this invention is not limited only to the said example, Of course, various changes can be added in the range which does not deviate from the summary of this invention.

本発明を実施する形態の一例としての粒状物殺菌装置の全体概略側面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is the whole schematic side view of the granular material sterilizer as an example of the form which implements this invention. 図１のＩＩ−ＩＩ方向矢視図である。It is an II-II direction arrow line view of FIG.

符号の説明Explanation of symbols

１ 多孔ドラム
２ 小孔
３ 外筒
９ 固定軸
１１ 粒状物取出口
１３ 高温気体供給口
１４ 開口
１５ 粒状物供給口
１８ 正圧ガス供給ダクト
２１ 吸引流路
２３ 負圧発生装置
２５ 正圧ガス流路
Ｓ 間隔 DESCRIPTION OF SYMBOLS 1 Perforated drum 2 Small hole 3 Outer cylinder 9 Fixed shaft 11 Granular material outlet 13 High temperature gas supply port 14 Opening 15 Granular material supply port 18 Positive pressure gas supply duct 21 Suction channel 23 Negative pressure generator 25 Positive pressure gas channel S interval

Claims (3)

殺菌する粒状物が通過できない小孔を周面に有して１方向に回転する多孔ドラムと、該多孔ドラムの周面と所要の間隔を隔てて多孔ドラムを包囲する外筒と、該外筒の下部に形成した粒状物取出口と、前記外筒の上部に形成した高温気体供給口と、前記多孔ドラムの周面が回転により上側に向う側部において前記間隔に対し上側のみが開口して連通するよう外筒に固定した粒状物供給口と、前記多孔ドラムの内部を吸引する負圧発生装置と、前記多孔ドラムの下側内面に接近配置して前記多孔ドラムの下側内面に向けて正圧ガスを噴出する正圧ガス供給ダクトとを備えたことを特徴とする粒状物殺菌装置。 A perforated drum rotating in one direction with a small hole on the peripheral surface through which particulate matter to be sterilized cannot pass, an outer cylinder surrounding the perforated drum with a predetermined distance from the peripheral surface of the perforated drum, and the outer cylinder A granular material outlet formed in the lower portion of the outer cylinder, a high-temperature gas supply port formed in the upper portion of the outer cylinder, and a side portion where the peripheral surface of the perforated drum faces upward due to rotation, only the upper side opens to communicate with the gap. A granular material supply port fixed to the outer cylinder, a negative pressure generating device for sucking the inside of the perforated drum, and a close proximity to the lower inner surface of the perforated drum and positively facing the lower inner surface of the perforated drum A granular material sterilizer comprising a positive pressure gas supply duct for ejecting pressurized gas. 前記負圧発生装置から排出される正圧ガスを前記正圧供給ダクトに導くようにしたことを特徴とする請求項１に記載の粒状物殺菌装置。   2. The particulate matter sterilizer according to claim 1, wherein the positive pressure gas discharged from the negative pressure generator is guided to the positive pressure supply duct. 前記多孔ドラムを貫通して設けた固定軸に前記正圧供給ダクトを固定し、且つ、前記固定軸に、前記負圧発生装置に連通する吸引流路と、前記正圧ガス供給ダクトに連通する正圧ガス流路とを備えたことを特徴とする請求項１又は２に記載の粒状物殺菌装置。   The positive pressure supply duct is fixed to a fixed shaft provided through the perforated drum, and the suction shaft that communicates with the negative pressure generator and the positive pressure gas supply duct communicate with the fixed shaft. The granular material sterilizer according to claim 1, further comprising a positive pressure gas flow path.
JP2005155370A 2005-05-27 2005-05-27 Granular material sterilizer Expired - Fee Related JP4198127B2 (en)

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