JP7678991B2 - Superheated steam generator - Google Patents
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Description
本発明は過熱水蒸気の発生装置に関し、特に食品や飼料等の殺菌や乾燥・焙煎等に使用される簡単な構造の過熱水蒸気の発生装置に関するものである。 The present invention relates to a superheated steam generator, and in particular to a superheated steam generator with a simple structure that is used for sterilization, drying, roasting, etc. of food and feed.
従来、食品を腐敗させないため、あるいは加工するため、高温の乾燥空気を食品に当てて乾燥や焙煎をすることが行われており、また、食品に高温の過熱水蒸気を照射して殺菌することが行われている。 Traditionally, to prevent food from spoiling or to process it, food has been dried or roasted by exposing it to high-temperature dry air, and food has also been sterilized by exposing it to high-temperature superheated steam.
しかしながら、簡単な構造で乾燥と過熱水蒸気による熱処理が実施できる装置は無かった。 However, there was no equipment with a simple structure that could perform drying and heat treatment using superheated steam.
本発明はそうした従来の課題を解決するものであり、下記構成の過熱水蒸気発生装置である。
〔１〕一方端が閉塞され他方端が開口した長尺の筒体（１）と、
前記筒体の閉塞された一方端部に取り付けられた燃料と空気を供給するためのバーナ（２）と、
前記筒体内のバーナの先方位置に設置された耐火蓄熱性成形体（３）と、
前記筒体内の閉塞部近傍の壁に設けられた、加圧水と加圧空気の混合物ミストを噴射する噴射ノズル（４）とから構成され、
かつ前記長尺の筒体（１）の内壁面と前記耐火蓄熱性成形体（３）の外面との間に筒体胴体部の断面積の４０～６０％の間隙を備えてなる過熱水蒸気発生装置。
〔２〕一方端が閉塞され他方端が開口した長尺の筒体（１）と、
前記筒体の閉塞された一方端部に取り付けられた燃料と空気を供給するためのバーナ（２）と、
前記筒体内のバーナの先方位置に設置された多孔質セラミック製の耐火蓄熱性成形体（３）と、
前記筒体内の閉塞部近傍の壁に設けられた、加圧水と加圧空気の混合物ミストを噴射する噴射ノズル（４）とから構成され、
かつ前記長尺の筒体（１）の内壁面と前記耐火蓄熱性成形体（３）の外面との間に筒体胴体部の断面積の４０～６０％の間隙を備えてなる過熱水蒸気発生装置。
〔３〕一方端が閉塞され他方端が開口した長尺の筒体（１）と、
前記筒体の閉塞された一方端部に取り付けられた燃料と空気を供給するためのバーナ（２）と、
前記筒体内のバーナの先方位置に設置された耐火性篭状容器（３ａ）と同容器内に充填された多数の耐火蓄熱性粒状体（３ｂ）とからなる耐火蓄熱性成形体（３）と、
前記筒体内の閉塞部近傍の壁に設けられた、加圧水と加圧空気の混合物ミストを噴射する噴射ノズル（４）とから構成され、
かつ前記長尺の筒体（１）の内壁面と前記耐火蓄熱性成形体（３）の外面との間に筒体胴体部の断面積の４０～６０％の間隙を備えてなる過熱水蒸気発生装置。
〔４〕耐火性篭状容器が耐熱性金属篭状又は耐熱性セラミックファイバー製の容器であり、耐火蓄熱性粒状体が耐熱性金属ボール又は耐熱性セラミックボールであることを特徴とする前記〔３〕に記載の過熱水蒸気発生装置。
〔５〕長尺の筒体（１）が、それよりも内径の大きな長尺の大筒体（１Ａ）に内挿されてなることを特徴とする前記〔１〕～〔４〕のいずれか１項に記載の過熱水蒸気発生装置。
The present invention is intended to solve such conventional problems, and provides a superheated steam generator having the following configuration.
[1] A long cylindrical body (1) having one end closed and the other end open;
a burner (2) for supplying fuel and air, the burner being attached to one closed end of the cylinder;
A refractory heat storage molding (3) installed in front of the burner in the cylindrical body;
and an injection nozzle (4) for injecting a mixture mist of pressurized water and pressurized air, the injection nozzle (4) being provided on a wall in the vicinity of the closed portion of the cylindrical body ,
The superheated steam generator further comprises a gap between the inner wall surface of the long cylindrical body (1) and the outer surface of the refractory heat storage molding (3) that is 40 to 60% of the cross-sectional area of the cylindrical body .
[2] A long cylindrical body (1) having one end closed and the other end open;
a burner (2) for supplying fuel and air, the burner being attached to one closed end of the cylinder;
A porous ceramic refractory heat storage molded body (3) is installed in front of the burner inside the cylinder;
and an injection nozzle (4) for injecting a mixture mist of pressurized water and pressurized air, the injection nozzle (4) being provided on a wall in the vicinity of the closed portion of the cylindrical body ,
The superheated steam generator further comprises a gap between the inner wall surface of the long cylindrical body (1) and the outer surface of the refractory heat storage molding (3) that is 40 to 60% of the cross-sectional area of the cylindrical body .
[3] A long cylindrical body (1) having one end closed and the other end open;
a burner (2) for supplying fuel and air, the burner being attached to one closed end of the cylinder;
a refractory heat storage molding (3) consisting of a refractory basket-shaped container (3a) installed in front of the burner in the cylinder and a large number of refractory heat storage granules (3b) filled in the container;
and an injection nozzle (4) for injecting a mixture mist of pressurized water and pressurized air, the injection nozzle (4) being provided on a wall in the vicinity of the closed portion of the cylindrical body ,
The superheated steam generator further comprises a gap between the inner wall surface of the long cylindrical body (1) and the outer surface of the refractory heat storage molding (3) that is 40 to 60% of the cross-sectional area of the cylindrical body .
[4] The superheated steam generator according to [3], characterized in that the fire-resistant basket-shaped container is a heat-resistant metal basket-shaped container or a heat-resistant ceramic fiber container, and the fire-resistant heat storage granules are heat-resistant metal balls or heat-resistant ceramic balls.
[5] A superheated steam generator according to any one of [1] to [4] , characterized in that a long cylindrical body (1) is inserted into a long large cylindrical body (1A) having a larger inner diameter than the long cylindrical body (1).
本発明によれば、簡単な構造で高温の過熱水蒸気を発生させることができ、食品等の乾燥・焙煎や殺菌処理を行うことができる。 According to the present invention, it is possible to generate high-temperature superheated steam with a simple structure, and it is possible to dry, roast, and sterilize food, etc.
本発明の１つの実施の形態を図面に基づいて説明する。
まず、図１は本発明実施例の過熱水蒸気発生装置の要部断面説明図であり、一方端が閉塞された長尺の筒体（１）と、同筒体（１）の閉塞された一方端部に取り付けられた燃料と空気を供給するためのバーナ（２）と、前記筒体内のバーナの先方位置に設置された耐火蓄熱性成形体（３）と、前記筒体内の閉塞部近傍の壁に設けられた、加圧水と加圧空気の混合物ミストを噴射する噴射ノズル（４）とから構成されている。
本発明の過熱水蒸気発生装置に用いられる、一方端が閉塞され他方端が開口した長尺の筒体（１）は、例えばステンレススチール（例えばＳＵＳ３１０Ｓ（２５Ｃｒ－２０Ｎｉ））などの耐熱性の金属で製作された円筒、角筒等の筒体である。
この長尺の筒体内に設置される耐火蓄熱性成形体（３）は、窒化ケイ素、アルミナ、ジルコニア、コージエライト、炭化ケイ素等のセラミックで構成され、バーナーの火炎に接して１，０００℃以上の高温に加熱され高温を保持するものである。
本発明では、その高温を保持した耐火蓄熱性成形体（３）の表面に向けて、同筒体（１）の閉塞部近傍の壁に設けられた噴射ノズルから加圧水と加圧空気の混合物ミストを噴射する。
すると、高温の耐火蓄熱性成形体（３）の表面に当たった加圧水と加圧空気の混合物ミストが瞬時に加熱されて高温の過熱水蒸気となって長尺の筒体の開口方向へ噴出する。
An embodiment of the present invention will now be described with reference to the drawings.
First, FIG. 1 is a cross-sectional explanatory diagram of the main parts of a superheated steam generator according to an embodiment of the present invention, which comprises a long cylindrical body (1) with one end closed, a burner (2) for supplying fuel and air attached to the closed end of the cylindrical body (1), a refractory, heat-storage molded body (3) installed in front of the burner inside the cylindrical body, and an injection nozzle (4) provided on the wall near the closed end inside the cylindrical body for spraying a mixture mist of pressurized water and compressed air.
The long tubular body (1) used in the superheated steam generator of the present invention, which has one end closed and the other end open, is a tubular body such as a cylinder or a rectangular tube made of a heat-resistant metal such as stainless steel (e.g., SUS310S (25Cr-20Ni)).
The fire-resistant, heat-storage molding (3) placed inside this long cylinder is made of ceramics such as silicon nitride, alumina, zirconia, cordierite, and silicon carbide, and is heated to high temperatures of over 1,000°C when it comes into contact with the burner flame and retains the high temperatures.
In the present invention, a mixture mist of pressurized water and pressurized air is sprayed onto the surface of the refractory heat storage molding (3) that has been kept at a high temperature from a spray nozzle provided on the wall near the closed part of the cylindrical body (1).
Then, the mixture mist of pressurized water and pressurized air hitting the surface of the high-temperature refractory and heat-storage molding (3) is instantly heated and turns into high-temperature superheated steam, which is ejected in the direction of the opening of the long cylinder.
なお、水と空気の混合物ミストは、単なる加圧水とは異なり、水粒子の粒径が非常に細かく、１５～３０μｍなので、耐火蓄熱性成形体（３）の表面に当たっても結露にならず、瞬間的に気化して過熱水蒸気となる。 In addition, unlike simple pressurized water, the water and air mixture mist has very fine water particles of 15 to 30 μm in diameter, so it does not condense even when it hits the surface of the fire-resistant and heat-storage molded body (3), but instantly vaporizes and becomes superheated steam.
なお、水と空気の混合物ミストは、単なる加圧水とは異なり、水粒子の粒径が非常に細かく、１５～３０μｍなので、耐火蓄熱性成形体（３）の表面に当たっても結露にならず、瞬間的に気化して過熱水蒸気となる。
この際、水は４００℃の過熱水蒸気になると、その体積が２，５００倍以上に膨張する。そこで、バーナー４からの燃料ガスが空気と反応して生じる炭酸ガスや水蒸気や窒素ガスも混有した混合ガスが筒体(１)内で生成するが、ミスト水の膨張が膨大なため、筒体(１)から噴出する混合ガスは、過熱水蒸気の含有率が８０％以上のものとなる。
したがって、この混合ガス（過熱水蒸気含有ガス）は無酸素状態のガスであって、被加熱処理物の食材を酸化させることがない。すなわち、食材を酸化させずに殺菌・焙煎等を行うことができる。
そして、耐火蓄熱性成形体（３）は、通常アルミナ、ジルコニア、炭化ケイ素等のセラミック製が好ましいが、その成形体は多孔質のものが表面積も多いので好ましく、特に連通多孔質のものが好ましい。
また、成形体の所々に多数の貫通孔を設けたものであっても良い。
In addition, unlike simple pressurized water, the water and air mixture mist has very fine water particles of 15 to 30 μm in diameter, so it does not condense even when it hits the surface of the fire-resistant and heat-storage molding (3), but instantly evaporates into superheated steam.
When the water becomes superheated steam at 400°C, its volume expands by more than 2,500 times. A mixed gas containing carbon dioxide, steam, and nitrogen gas, which is generated when the fuel gas from the burner 4 reacts with the air, is generated inside the cylinder (1). However, because the expansion of the mist water is so great, the mixed gas sprayed out from the cylinder (1) contains more than 80% superheated steam.
Therefore, this mixed gas (gas containing superheated steam) is an oxygen-free gas and does not oxidize the food material to be heated. In other words, sterilization, roasting, etc. can be performed without oxidizing the food material.
The refractory and heat-storage molded body (3) is preferably made of ceramics such as alumina, zirconia, silicon carbide, etc., and the molded body is preferably porous because it has a large surface area, and particularly preferably has interconnected pores.
The molded body may also have a large number of through holes at various locations.
さらに、耐火蓄熱性成形体（３）は、図３、図４に示すようなセラミックボール３ｂが充填された耐火性篭状容器（パンチングメタル製）３ａからなるものでもよい。
その場合、セラミックボール３ｂとしては窒化ケイ素セラミックボールが好ましく、パンチングメタルとしては耐熱性のステンレスや鉄、チタン、タングステン等が好ましい。
パンチングメタルとしては低い熱膨張係数を有する金属材料が好ましく、例えばＦｅ－３６Ｎｉからなるインバー合金やＦｅ２９Ｎｉ－１７Ｃｏからなるコバール合金が挙げられるが、特に反りや歪みが生じにくいＨＲＡ９２９合金は好ましい材料の一つである。
耐火性篭状容器としては、耐熱性金属（例えばＳＵＳ３１０Ｓ（２５Ｃｒ－２０Ｎｉ）（耐熱温度１０３５℃）やチタン製のものが好ましく、篭状容器の代わりに、壁に多数の貫通孔を備えた箱状体を採用しても良い。
その場合、箱状体はセラミック製、セラミックファイバー製であっても良い。
充填される耐火蓄熱性粒状体としては、窒化ケイ素、アルミナ、ジルコニア、炭化ケイ素、コージエライト等の耐熱性セラミックボールを使用することが好ましい。
Furthermore, the fireproof heat storage molded body (3) may be a fireproof basket-like container (made of punched metal) 3a filled with ceramic balls 3b as shown in Figs.
In this case, the ceramic balls 3b are preferably silicon nitride ceramic balls, and the punching metal is preferably made of heat-resistant stainless steel, iron, titanium, tungsten, or the like.
As the punching metal, a metal material having a low thermal expansion coefficient is preferable, such as an Invar alloy made of Fe-36Ni or a Kovar alloy made of Fe29Ni-17Co. One of the preferable materials is HRA929 alloy, which is particularly resistant to warping and distortion.
The fireproof cage-like container is preferably made of a heat-resistant metal (e.g., SUS310S (25Cr-20Ni) (heat-resistant temperature 1035° C.) or titanium, and a box-like body having a large number of through holes in the wall may be used instead of the cage-like container.
In this case, the box-shaped body may be made of ceramic or ceramic fiber.
As the refractory and heat-storing granular material to be filled, it is preferable to use heat-resistant ceramic balls made of silicon nitride, alumina, zirconia, silicon carbide, cordierite, or the like.
長尺の筒体の内壁面と耐火蓄熱性成形体の外面との間には、間隙を設けることが好ましく、筒体胴体部の断面積の４０～６０％の間隙を設けることが望ましい。
この間隙を設けることで、耐火蓄熱性成形体近傍で生成した大量の過熱水蒸気を含む高温ガスの通過を容易にすることができる。
この間隙は左右に、又は上下左右に設けることが好ましい。
It is preferable to provide a gap between the inner wall surface of the long cylinder and the outer surface of the refractory and heat storage molded body, and it is desirable to provide a gap of 40 to 60% of the cross-sectional area of the body of the cylinder.
By providing this gap, it is possible to facilitate the passage of high-temperature gas containing a large amount of superheated steam generated in the vicinity of the refractory and heat storage molded body.
It is preferable that the gap be provided on the left and right, or on the top, bottom, left and right.
さらに、図２に示すごとく、長尺の筒体（１）には、それよりも内径の大きな長尺の大筒体（１Ａ）を被せて設ける（長尺の筒体が、それよりも内径の大きな長尺の大筒体に内挿されてなる）ことも好ましい。
長尺の大筒体（１Ａ）は、長尺の筒体（１）の表面温度を直接外部に伝えない役割を果たし、いわば断熱作用を奏する。
さらに、長尺の大筒体（１Ａ）と長尺の筒体（１）との間の空隙に空気を圧送すれば長尺の筒体（１）内で生成された過熱水蒸気を出口から加速して放出させることができる。
なお、この空隙にはセラミックウール等の断熱材を充填しても良い。
Furthermore, as shown in FIG. 2, it is also preferable to cover the long cylindrical body (1) with a long large cylindrical body (1A) having a larger inner diameter than the long cylindrical body (1) (the long cylindrical body is inserted into the long large cylindrical body having a larger inner diameter than the long cylindrical body).
The long cylindrical body (1A) serves the role of preventing the surface temperature of the long cylindrical body (1) from being directly transmitted to the outside, and thus serves as a heat insulator.
Furthermore, by pumping air into the gap between the long cylindrical body (1A) and the long cylindrical body (1), the superheated steam generated within the long cylindrical body (1) can be accelerated and released from the outlet.
The gap may be filled with a heat insulating material such as ceramic wool.
次に、本発明装置を組み込んだ粉体の熱処理装置について説明する。 図３に示す装置は、細片状食材の殺菌・焙煎装置であり、図３において、被熱処理物である食材細片が供給される円筒状のドラム（１０）が横設されており、その内部には多数のセラミックボール（１１）が収容されている。
セラミックボール（１１）は窒化ケイ素又はアルミナセラミックである。
Next, a powder heat treatment device incorporating the device of the present invention will be described. The device shown in Fig. 3 is a device for sterilizing and roasting small pieces of food material, and in Fig. 3, a cylindrical drum (10) is provided horizontally to which small pieces of food material to be heat-treated are supplied, and a large number of ceramic balls (11) are accommodated inside the drum.
The ceramic balls (11) are silicon nitride or alumina ceramic.
円筒状のドラム（１０）の上方には、箱筒状に形成された上部中空室２０が配置され、その下端がドラム（１０）に連通するとともに、その一方の側面の上端部には、熱処理された食材細片を取り出すための取出口（２１）が突設されている。
円筒状のドラム（１０）の底部付近の周面には、ドラム（１０）の円周の接線方向に沿って配設された本発明過熱水蒸気発生装置からの過熱水蒸気含有ガス供給口（９）の先端が、開口している。
また、この過熱水蒸気ガス供給口（９）と上部中空室（２０）との間には、食材細片を中空室（２０）内に供給するための食材供給通路（３０）が、先端をドラム（１０）の周面に開口して立設され、その上方には、食材細片を定量供給するためのロータリーフィーダ（３１）が設けられている。
A box-shaped upper hollow chamber 20 is disposed above the cylindrical drum (10), the lower end of which is connected to the drum (10), and a removal port (21) is protruded from the upper end of one of its sides for removing the heat-treated food pieces.
The tip of a superheated steam-containing gas supply port (9) from the superheated steam generator of the present invention is open on the peripheral surface near the bottom of the cylindrical drum (10), which is arranged along the tangent direction of the circumference of the drum (10).
In addition, between the superheated steam gas supply port (9) and the upper hollow chamber (20), a food supply passage (30) for supplying food particles into the hollow chamber (20) is erected with its tip opening on the peripheral surface of the drum (10), and above it is provided a rotary feeder (31) for supplying a fixed amount of food particles.
上記図３の装置を使用して、本発明実施例装置の過熱水蒸気発生装置の過熱水蒸気供給口（９）から、円筒状のドラム（１０）内に過熱水蒸気を送給し、また食材供給通路（３０）から食材細片を供給すると、円筒状のドラム（１０）内で食材細片がセラミックボールと接触して拡散されながら過熱水蒸気含有ガスと接触して加熱処理される。
そして、加熱処理されて比重が軽くなった食材細片は上部中空室（２０）を上昇して取出口（２１）から外部に取り出される。
なお、食材細片としては、おから、ふすま、米粉、米糠、そば、魚粉、きのこ栽培用のおが屑等が採用される。
Using the apparatus of Figure 3 described above, superheated steam is fed into a cylindrical drum (10) from the superheated steam supply port (9) of the superheated steam generator of the embodiment of the present invention, and food particles are fed from the food material supply passage (30). Inside the cylindrical drum (10), the food particles come into contact with the ceramic balls and are diffused while coming into contact with the superheated steam-containing gas and are heat-treated.
The food particles, which have been heat-treated and have a lighter specific gravity, rise in the upper hollow chamber (20) and are taken out through the outlet (21) to the outside.
As food particles, soybean pulp, wheat bran, rice flour, rice bran, buckwheat, fish meal, sawdust for mushroom cultivation, etc. are used.
次に本発明の実施例について説明する。
実施例１；
図１に示す本発明の過熱水蒸気発生装置を使用した。
すなわち、図１に示す過熱水蒸気含有ガス発生装置の、筒体（１）の閉塞された一方端部に取り付けられた燃料と空気を供給するためのバーナ（２）から火炎を前記筒体内のバーナの先方位置に設置された耐火蓄熱性成形体（３）に照射して高温に加熱し、次いでその高温に加熱された耐火蓄熱性成形体（３）に対して、前記筒体内の閉塞部近傍の壁に設けられた噴射ノズル（４）から加圧水と加圧空気の混合物ミストを噴射した。
その結果、長尺の筒体（１）開口部から水蒸気ガス（Ｈ2Ｏ）８０％以上を含む８００℃のガスが勢いよく噴出した。
Next, an embodiment of the present invention will be described.
Example 1
The superheated steam generator of the present invention shown in FIG. 1 was used.
That is, a flame was irradiated from a burner (2) for supplying fuel and air attached to one closed end of a cylindrical body (1) of the superheated steam-containing gas generating device shown in Figure 1 to a refractory heat-regenerative molding (3) installed in front of the burner inside the cylindrical body, heating it to a high temperature, and then a mixture mist of pressurized water and compressed air was sprayed onto the refractory heat-regenerative molding (3) heated to a high temperature from an injection nozzle (4) provided on the wall near the closed part inside the cylindrical body.
As a result, gas containing 80% or more of water vapor (H 2 O) at 800° C. was forcefully ejected from the opening of the long cylindrical body (1).
本例で用いられる、一方端が閉塞され他方端が開口した長尺の筒体（１）は、ステンレススチール（ＳＵＳ３１０Ｓ）で製作された。
まず、一方端が閉塞され他方端が開口した長尺の筒体（１）を厚み２ｍｍのステンレス鋼；ＳＵＳ３１０Ｓで作成した。
そのサイズは胴体直径が１０１．６ｍｍ、全長が７７０ｍｍであり、筒体（１）の一方端にバーナー（２）を取着し、また噴射ノズル（４）を取着した。
さらに筒体（１）内のバーナー（２）の先方位置に、ステンレス鋼；ＳＵＳ３１０Ｓ製の籠状容器に多数の窒化ケイ素セラミックボールを充填して製作された耐火蓄熱性成形体（３）を配置した。
該耐火蓄熱性成形体（３）としては、厚み３ｍｍのＳＵＳ３１０Ｓ製板に直径５ｍｍの穴を０．９個／１０ｍｍ2穿設した板を用いて作成された高さ６０ｍｍ×幅６０ｍｍ×長さ８０ｍｍのパンチングメタル製の籠体内に直径１０ｍｍの窒化ケイ素セラミック製のボールを一杯に充填したものを使用した。
本発明の耐火蓄熱性成形体として、窒化ケイ素セラミックは非常に好適なものであり、耐熱衝撃性に強く、高温の窒化ケイ素セラミックに加圧空気（０．３ＭＰａ）と加圧水の混合物ミストを直接噴射しても亀裂が入らず長期間安定的に使用することができる。
耐熱金属製の籠状の耐火蓄熱性成形体は、その後端部が筒体（１）内のバーナー（２）から２００ｍｍ離れた位置に配置された。
そして、前記長尺の筒体の内壁面と耐火蓄熱性成形体の外面との間に筒体胴体部の断面積の４０～６０％の間隙を設けた。
The long cylindrical body (1) used in this example, one end of which is closed and the other end of which is open, was made of stainless steel (SUS310S).
First, a long cylindrical body (1) having one closed end and the other open end was made of stainless steel (SUS310S) having a thickness of 2 mm.
Its dimensions were a body diameter of 101.6 mm and a total length of 770 mm, and a burner (2) was attached to one end of the cylindrical body (1), and an injection nozzle (4) was also attached.
Furthermore, a refractory heat storage molded body (3) made by filling a large number of silicon nitride ceramic balls in a basket-shaped container made of stainless steel (SUS310S) was placed in front of the burner (2) inside the cylindrical body (1).
The fire-resistant and heat-storage molded body (3) used was a punched metal cage 60 mm high x 60 mm wide x 80 mm long made from a 3 mm thick SUS310S plate with 0.9 holes of 5 mm diameter per 10 mm2 drilled into it, filled with silicon nitride ceramic balls of 10 mm diameter.
Silicon nitride ceramic is extremely suitable as the fire-resistant, heat-storage molding of the present invention, as it has high thermal shock resistance and can be used stably for a long period of time without cracking even when a mixture mist of pressurized air (0.3 MPa) and pressurized water is directly sprayed onto the high-temperature silicon nitride ceramic.
A cage-shaped refractory heat storage molding made of heat-resistant metal was placed with its rear end at a position 200 mm away from the burner (2) inside the cylindrical body (1).
A gap of 40 to 60% of the cross-sectional area of the body of the cylinder was provided between the inner wall surface of the long cylinder and the outer surface of the refractory and heat-storage molded body.
そこで、バーナー２から燃料のＬＰＧ２ｍ3／ｈと、空気８．６ｍ3／ｈを噴射し、また噴射ノズルから加圧空気（０．３ＭＰａ）と加圧水の混合物ミスト（水滴直径２０μｍ）（加圧空気；水＝５００；１）を１５０ｍｌ／ｍｉｎを１０００℃に加熱された耐火蓄熱性成形体（３）に向けて噴射した。
その結果、水蒸気ガス（Ｈ2Ｏ）８０％以上を含む８００℃の過熱水蒸気が筒体(１)の他方端が開口部から５．９ｍ3／ｍｉｎで噴出した。
Then, 2 m3 /h of LPG fuel and 8.6 m3 /h of air were sprayed from burner 2, and a mixture mist of pressurized air (0.3 MPa) and pressurized water (droplet diameter 20 μm) (compressed air: water = 500: 1) was sprayed from the spray nozzle at 150 ml/min toward the refractory heat storage molding (3) heated to 1000°C.
As a result, superheated steam at 800° C. containing 80% or more of water vapor gas (H 2 O) was ejected from the opening at the other end of the cylindrical body (1) at a rate of 5.9 m 3 /min.
実施例２；
上記１に示す過熱水蒸気発生装置を組み込んだ図３の細片状食材の殺菌・焙煎装置を使用して米糠を加熱処理した。
すなわち、図３に示す過熱水蒸気供給口（９）から、円筒状のドラム（１０）内に４００℃の過熱水蒸気を送給し、また食材供給通路（３０）から米糠を供給し、円筒状のドラム（１０）内で米糠とセラミックボールと接触・攪拌させながら過熱水蒸気と５秒間接触させた。
そして、加熱処理されて比重が軽くなった米糠を上部中空室（２０）の取出口（２１）から取り出した。
その結果、処理前には水分が１２．１５％、一般生菌の菌数が２．５×１０5個及び大腸菌群の菌数が測定不能多数個であった米糠が、上記４００℃の過熱水蒸気を５秒間照射接触して得られたものは水分１．１８％、一般生菌の菌数が１．０×１０2個及び大腸菌群の菌数が陰性の焙煎米糠となった。
Example 2
The rice bran was heat-treated using the sterilization and roasting device for chipped food materials shown in FIG. 3 incorporating the superheated steam generator shown in 1 above.
That is, superheated steam at 400°C was fed into a cylindrical drum (10) from a superheated steam supply port (9) shown in Figure 3, and rice bran was fed from a food material supply passage (30). The rice bran and the ceramic balls were brought into contact with each other and stirred within the cylindrical drum (10) while being brought into contact with the superheated steam for 5 seconds.
Then, the rice bran, which has been heat-treated and has a lighter specific gravity, is taken out from the outlet (21) of the upper hollow chamber (20).
As a result, before treatment, the rice bran had a moisture content of 12.15%, a general viable bacterial count of 2.5 x 105 , and an unmeasurable number of coliform bacteria, but after exposure to the 400°C superheated steam for 5 seconds, the resulting roasted rice bran had a moisture content of 1.18%, a general viable bacterial count of 1.0 x 102 , and a negative coliform bacterial count.
１；長尺の筒体
１Ａ；外筒
１Ｂ；気体導入口
２；バーナ
３；耐火蓄熱性成形体
３ａ；篭状容器
３ｂ；セラミックボール
４；噴射ノズル
９；過熱水蒸気含有ガス供給口（長尺の筒体の開口部）
１０；円筒状のドラム
１１；セラミックボール
２０；上部中空室
２１；取出口
３０；食材細片供給通路
３１；ロータリーフィーダ
1; Long cylindrical body 1A; Outer cylinder 1B; Gas inlet 2; Burner 3; Refractory heat storage molding 3a; Cage-shaped container 3b; Ceramic ball 4; Injection nozzle 9; Superheated steam-containing gas supply port (opening of long cylindrical body)
10; cylindrical drum 11; ceramic ball 20; upper hollow chamber 21; outlet 30; food chip supply passage 31; rotary feeder
Claims (5)
前記筒体の閉塞された一方端部に取り付けられた燃料と空気を供給するためのバーナ（２）と、
前記筒体内のバーナの先方位置に設置された耐火蓄熱性成形体（３）と、
前記筒体内の閉塞部近傍の壁に設けられた、加圧水と加圧空気の混合物ミストを噴射する噴射ノズル（４）とから構成され、
かつ前記長尺の筒体（１）の内壁面と前記耐火蓄熱性成形体（３）の外面との間に筒体胴体部の断面積の４０～６０％の間隙を備えてなる過熱水蒸気発生装置。 A long cylindrical body (1) having one end closed and the other end open;
a burner (2) for supplying fuel and air, the burner being attached to one closed end of the cylinder;
A refractory heat storage molding (3) installed in front of the burner in the cylindrical body;
and an injection nozzle (4) for injecting a mixture mist of pressurized water and pressurized air, the injection nozzle (4) being provided on a wall in the vicinity of the closed portion of the cylindrical body ,
The superheated steam generator further comprises a gap between the inner wall surface of the long cylindrical body (1) and the outer surface of the refractory heat storage molding (3) that is 40 to 60% of the cross-sectional area of the cylindrical body .
前記筒体の閉塞された一方端部に取り付けられた燃料と空気を供給するためのバーナ（２）と、
前記筒体内のバーナの先方位置に設置された多孔質セラミック製の耐火蓄熱性成形体（３）と、
前記筒体内の閉塞部近傍の壁に設けられた、加圧水と加圧空気の混合物ミストを噴射する噴射ノズル（４）とから構成され、
かつ前記長尺の筒体（１）の内壁面と前記耐火蓄熱性成形体（３）の外面との間に筒体胴体部の断面積の４０～６０％の間隙を備えてなる過熱水蒸気発生装置。 A long cylindrical body (1) having one end closed and the other end open;
a burner (2) for supplying fuel and air, the burner being attached to one closed end of the cylinder;
A porous ceramic refractory heat storage molded body (3) is installed in front of the burner inside the cylinder;
and an injection nozzle (4) for injecting a mixture mist of pressurized water and pressurized air, the injection nozzle (4) being provided on a wall in the vicinity of the closed portion of the cylindrical body ,
The superheated steam generator further comprises a gap between the inner wall surface of the long cylindrical body (1) and the outer surface of the refractory heat storage molding (3) that is 40 to 60% of the cross-sectional area of the cylindrical body .
前記筒体の閉塞された一方端部に取り付けられた燃料と空気を供給するためのバーナ（２）と、
前記筒体内のバーナの先方位置に設置された耐火性篭状容器（３ａ）と同容器内に充填された多数の耐火蓄熱性粒状体（３ｂ）とからなる耐火蓄熱性成形体（３）と、
前記筒体内の閉塞部近傍の壁に設けられた、加圧水と加圧空気の混合物ミストを噴射する噴射ノズル（４）とから構成され、
かつ前記長尺の筒体（１）の内壁面と前記耐火蓄熱性成形体（３）の外面との間に筒体胴体部の断面積の４０～６０％の間隙を備えてなる過熱水蒸気発生装置。 A long cylindrical body (1) having one end closed and the other end open;
a burner (2) for supplying fuel and air, the burner being attached to one closed end of the cylinder;
a refractory heat storage molding (3) consisting of a refractory basket-shaped container (3a) installed in front of the burner in the cylinder and a large number of refractory heat storage granules (3b) filled in the container;
and an injection nozzle (4) for injecting a mixture mist of pressurized water and pressurized air, the injection nozzle (4) being provided on a wall in the vicinity of the closed portion of the cylindrical body ,
The superheated steam generator further comprises a gap between the inner wall surface of the long cylindrical body (1) and the outer surface of the refractory heat storage molding (3) that is 40 to 60% of the cross-sectional area of the cylindrical body .
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| CN111156494A (en) | 2020-01-16 | 2020-05-15 | 江苏河海新能源股份有限公司 | High-temperature steam generating device |
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| JP2011047625A (en) | 2009-08-28 | 2011-03-10 | Ugajin Seisakusho:Kk | Superheated steam generating device and method of generating superheated steam by using the same |
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