JP2016175023A - Heating kneader whose heat source is steam - Google Patents

Heating kneader whose heat source is steam Download PDF

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JP2016175023A
JP2016175023A JP2015057486A JP2015057486A JP2016175023A JP 2016175023 A JP2016175023 A JP 2016175023A JP 2015057486 A JP2015057486 A JP 2015057486A JP 2015057486 A JP2015057486 A JP 2015057486A JP 2016175023 A JP2016175023 A JP 2016175023A
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raw material
steam
powder raw
casing
heating
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JP6413864B2 (en
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恵理子 平賀
Eriko Hiraga
恵理子 平賀
聖二 福永
Seiji Fukunaga
聖二 福永
正紀 清水
Masanori Shimizu
正紀 清水
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Sintokogio Ltd
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Sintokogio Ltd
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Priority to JP2015057486A priority Critical patent/JP6413864B2/en
Priority to KR1020160030322A priority patent/KR20160112974A/en
Priority to CN201610149937.4A priority patent/CN105983355A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2322—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes with parallel axes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/40—Mixers with rotor-rotor system, e.g. with intermeshing teeth
    • B01F27/42—Mixers with rotor-rotor system, e.g. with intermeshing teeth with rotating surfaces next to each other, i.e. on substantially parallel axes
    • B01F27/421—Mixers with rotor-rotor system, e.g. with intermeshing teeth with rotating surfaces next to each other, i.e. on substantially parallel axes provided with intermeshing elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
    • B01F27/721—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two or more helices in the same receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
    • B01F27/726—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two helices with opposite pitch on the same shaft; with two helices on the same axis, driven in opposite directions or at different speeds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/91—Heating or cooling systems using gas or liquid injected into the material, e.g. using liquefied carbon dioxide or steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/22—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by pressing in moulds or between rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
    • F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F2035/99—Heating

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a heating kneader capable of efficiently and uniformly kneading a powder raw material with a viscous binder.SOLUTION: A rotating agitation means is disposed at the inside of a casing 1 supplied with a powder raw material and a binder. The agitation means is, for example, screw blades 2. A plurality of steam jet ports 7 jetting superheated steam or saturated steam in an orthogonal direction or oblique direction to a moving direction of the powder raw material by the agitation means toward the inner powder raw material in the casing are disposed at the bottom surface of the casing 1 and then the powder raw material is directly heated.SELECTED DRAWING: Figure 1

Description

本発明は、粉体原料をバインダーと混練するために適した、過熱水蒸気もしくは飽和水蒸気を加熱源とする加熱混練装置に関するものである。   The present invention relates to a heating and kneading apparatus suitable for kneading a powder raw material with a binder and using superheated steam or saturated steam as a heating source.

粉体原料を造粒の前工程等において、連続的に加熱しつつ混練する加熱混練装置が用いられている。またその加熱源として、過熱水蒸気もしくは飽和水蒸気が広く用いられている。   A heating and kneading apparatus that kneads powder raw materials while continuously heating them in a pre-granulation step or the like is used. As the heating source, superheated steam or saturated steam is widely used.

このような水蒸気を加熱源とする加熱混練装置は、回転軸が縦型の縦軸型の装置と、回転軸が横型の横軸型の装置とに大別される。また水蒸気による加熱方式は、間接加熱方式と直接加熱方式とに大別される。   Such a heating and kneading apparatus using steam as a heat source is roughly classified into a vertical axis apparatus having a vertical rotation axis and a horizontal axis apparatus having a horizontal rotation axis. Further, the heating method using water vapor is roughly classified into an indirect heating method and a direct heating method.

縦軸型で間接加熱方式の加熱混練装置としては、特許文献１、２に示されるように、処理槽の周囲のジャケットに水蒸気を通して加熱するバッチ式縦型ミキサーがある。しかし間接加熱方式の加熱混練装置は、加熱効率のうえでは直接加熱方式に及ばない。   As a vertical kneading type indirect heating type heating and kneading apparatus, as shown in Patent Documents 1 and 2, there is a batch type vertical mixer that heats steam through a jacket around a processing tank. However, the indirect heating type heating and kneading apparatus does not reach the direct heating type in terms of heating efficiency.

そこでバッチ式縦型ミキサーの処理槽の側面から内部に水蒸気を供給して直接加熱方式とすることも考えられるが、処理量の変更にともない水蒸気供給口の取付位置の変更が必要となる。このため装置構造が複雑化したり、処理量ごとに都度設計が必要となるため、装置製作のコストが高くなる。   Therefore, it is conceivable to supply the steam from the side surface of the processing tank of the batch type vertical mixer to the direct heating method, but it is necessary to change the mounting position of the steam supply port in accordance with the change of the processing amount. For this reason, the structure of the apparatus becomes complicated, and a design is required for each processing amount, which increases the cost of manufacturing the apparatus.

一方、横軸型の加熱混練装置は、間接加熱方式、直接加熱方式ともに各種の構造のものが多数存在する。直接加熱方式の加熱混練装置も水蒸気の供給方向は、粉体原料の移動方向に対して平行とするか、粉体原料に通気するか、また平行流であっても向流とするか並流とするかなど、様々なものがある。このうち、平行流・向流型のものは特許文献３、４に記載されており、通気・並流型のものは特許文献５、６に記載されており、通気・直交流型のものは特許文献７に記載されている。   On the other hand, there are many horizontal axis type heating and kneading apparatuses having various structures for both indirect heating and direct heating. The heating and kneading apparatus of the direct heating method also makes the supply direction of water vapor parallel to the moving direction of the powder raw material, vents to the powder raw material, or even if it is a parallel flow, it is countercurrent or parallel flow There are various things such as. Among them, the parallel flow / counter flow type is described in Patent Documents 3 and 4, the ventilation / cocurrent flow type is described in Patent Documents 5 and 6, and the ventilation / cross flow type is It is described in Patent Document 7.

一般に向流型のものは並流型のものよりも熱効率が大きいとされている。しかし上記した加熱混練装置は粉体単独の加熱混練に用いられるものであって、粉体原料を低温時における粘度の高いバインダーと混練するためには不向きである。何故なら、向流型の加熱混練装置では出口側から水蒸気が供給されるため入口部分の温度が低く、低温時における粘度の高いバインダーが塊りとなってしまい均一分散しにくいからである。   In general, the counter-current type has a higher thermal efficiency than the co-current type. However, the above-mentioned heating and kneading apparatus is used for heating and kneading powder alone, and is not suitable for kneading a powder raw material with a binder having a high viscosity at low temperatures. This is because in the counter-flow type heating and kneading apparatus, since the water vapor is supplied from the outlet side, the temperature of the inlet portion is low, and the binder having a high viscosity at a low temperature is agglomerated and difficult to uniformly disperse.

特開２００４−０８５１６０号公報JP 2004-085160 A 特開２００３−３０５４３４号公報JP 2003-305434 A 特開２００５−２４１２３９号公報JP 2005-241239 A 特開２００１−２５２６４４号公報JP 2001-252644 A 特開２００３−０５３２９１号公報JP 2003-053291 A 特開２００１−１９１０５０号公報JP 2001-191050 A 特開２００２−１３０６２９号公報JP 2002-130629 A

従って本発明の目的は上記した従来の問題点を解決し、粉体原料を低温時における粘度の高いバインダーと効率よく均一に混練することができる水蒸気を加熱源とする加熱混練装置を提供することである。   Accordingly, an object of the present invention is to solve the above-mentioned conventional problems and to provide a heating and kneading apparatus using steam as a heating source that can efficiently and uniformly knead a powder raw material with a binder having a high viscosity at low temperatures. It is.

上記の課題を解決するためになされた本発明の水蒸気を加熱源とする加熱混練装置は、粉体原料とバインダーとが供給されるケーシングの内部に、回転する撹拌手段を備えるとともに、ケーシングの底面にはケーシングの内部の粉体原料に向けて、前記撹拌手段による粉体原料の移動方向に対して直行する方向に、過熱水蒸気もしくは飽和水蒸気を噴出する水蒸気噴出口を複数個設けたことを特徴とするものである。   A heating and kneading apparatus using water vapor as a heating source of the present invention made to solve the above problems includes a rotating stirring means inside a casing to which a powder raw material and a binder are supplied, and a bottom surface of the casing. Is provided with a plurality of steam outlets for jetting superheated steam or saturated steam in a direction perpendicular to the moving direction of the powder raw material by the stirring means toward the powder raw material inside the casing. It is what.

なお請求項２のように、ケーシングが横型の筒状体であり、撹拌手段が２軸の横軸のスクリュー羽根である構造とすることができる。あるいは請求項３のように、ケーシングが縦型の容器であり、撹拌手段が縦軸の撹拌羽根である構造とすることができる。いずれの場合にも、請求項４のように、粉体原料が過熱水蒸気もしくは飽和水蒸気との接触により加熱された後にバインダーと混練される構造とすることが好ましい。   According to a second aspect of the present invention, the casing can be a horizontal cylindrical body, and the stirring means can be a biaxial screw blade having a horizontal axis. Alternatively, as in claim 3, the casing may be a vertical container and the stirring means may be a vertical stirring blade. In any case, it is preferable that the powder raw material is kneaded with the binder after being heated by contact with superheated steam or saturated steam as in claim 4.

本発明の加熱混練装置は、ケーシングの底面にケーシングの内部の粉体原料に向けて、前記撹拌手段による粉体原料の移動方向に対して直行する方向に、過熱水蒸気もしくは飽和水蒸気を噴出する水蒸気噴出口を複数個設けた構造である。このように水蒸気を粉体原料に直接通気するため、広い伝熱面積を確保することができ、熱が粉体原料に速く伝わるため、加熱時間を短縮することができる。また、並流で噴出するよりも熱効率が高くなる。従ってバインダーの粘性が高い場合にも、均一混練が可能となる。さらにケーシングの底面に水蒸気噴出口を複数個設けたので、縦軸型とした場合にも横軸型とした場合にも、処理量の大小にかかわらず確実な伝熱が可能となる利点がある。この複数個の水蒸気噴出口を入り口にも設ければ、昇温された粉体原料に低温粘度の高いバインダーを添加することが可能となり、分散性の向上につながる。   The heating and kneading apparatus of the present invention is a steam for jetting superheated steam or saturated steam in the direction perpendicular to the moving direction of the powder material by the stirring means toward the powder material inside the casing on the bottom surface of the casing. The structure is provided with a plurality of jet nozzles. Thus, since water vapor is directly ventilated to the powder raw material, a wide heat transfer area can be secured, and heat is quickly transmitted to the powder raw material, so that the heating time can be shortened. In addition, the thermal efficiency is higher than when jetting in parallel flow. Therefore, uniform kneading is possible even when the viscosity of the binder is high. Furthermore, since a plurality of water vapor outlets are provided on the bottom surface of the casing, there is an advantage that reliable heat transfer is possible regardless of the amount of processing regardless of whether the vertical axis type or the horizontal axis type is used. . If this plurality of water vapor outlets are also provided at the inlet, it is possible to add a binder having a high low temperature viscosity to the heated powder raw material, leading to an improvement in dispersibility.

本発明の第１の実施形態を示す軸線を含む平面での断面図である。It is sectional drawing in the plane containing the axis line which shows the 1st Embodiment of this invention. 図１の装置の軸線に垂直な平面での断面図である。FIG. 2 is a cross-sectional view in a plane perpendicular to the axis of the apparatus of FIG. 本発明の第２の実施形態を示す軸線を含む平面での断面図である。It is sectional drawing in the plane containing the axis line which shows the 2nd Embodiment of this invention. 図３の装置の蓋部の平面図である。It is a top view of the cover part of the apparatus of FIG.

以下に本発明の好ましい実施形態を示す。
図１、図２は、本発明の第１の実施形態である連続式横二軸ミキサーを示す断面図である。これらの図において、１は横型で筒状のケーシング、２はその内部に設けられた撹拌手段である２軸の横軸のスクリュー羽根である。これらのスクリュー羽根２はモータ３によって、図２に矢印で示すように左右対称に回転する。 Preferred embodiments of the present invention are shown below.
1 and 2 are sectional views showing a continuous horizontal biaxial mixer according to a first embodiment of the present invention. In these figures, reference numeral 1 denotes a horizontal and cylindrical casing, and 2 denotes a biaxial horizontal screw blade which is a stirring means provided in the casing. These screw blades 2 are rotated symmetrically by a motor 3 as indicated by arrows in FIG.

ケーシング１の天井面には原料供給口４と、バインダー供給口５とが形成されている。図１に示すように、原料供給口４はスクリュー羽根２の基部側にあり、バインダー供給口５は原料供給口４よりも先端側にある。またケーシング１の先端部には混練物取出し口６が下向きに形成されている。このため、原料供給口４から供給された粉体原料は、バインダー供給口５から供給される液状のバインダーと混練されながら図１の左方向である先端方向に搬送され、混練物は混練物取出し口６から排出される。   A raw material supply port 4 and a binder supply port 5 are formed on the ceiling surface of the casing 1. As shown in FIG. 1, the raw material supply port 4 is on the base side of the screw blade 2, and the binder supply port 5 is on the tip side of the raw material supply port 4. Further, a kneaded product outlet 6 is formed at the front end of the casing 1 downward. For this reason, the powder raw material supplied from the raw material supply port 4 is conveyed in the tip direction which is the left direction in FIG. 1 while being kneaded with the liquid binder supplied from the binder supply port 5, and the kneaded product is taken out of the kneaded product. It is discharged from the mouth 6.

ケーシング１の底面には、水蒸気噴出口７が複数個設けられている。水蒸気噴出口７はケーシング１の内部の粉体原料に向けて、過熱水蒸気もしくは飽和水蒸気を噴出する。水蒸気噴出口７は、撹拌手段による粉体原料の移動方向に対して直交する方向に、すなわち上向きに設けられるが、粉体原料の移動方向に対して傾斜させて設けても良い。図１に示すように水蒸気噴出口７は原料供給口４とバインダー供給口５とが形成されている付近により多く設けられ、それよりも先端側では数が少なくなっている。また図２に示されるように、スクリュー羽根２の先端部に向けて水平方向から過熱水蒸気もしくは飽和水蒸気を噴出する補助噴出口８を設けることができる。   A plurality of water vapor outlets 7 are provided on the bottom surface of the casing 1. The steam outlet 7 ejects superheated steam or saturated steam toward the powder raw material inside the casing 1. The steam outlet 7 is provided in a direction orthogonal to the moving direction of the powder raw material by the stirring means, that is, upward, but may be provided inclined with respect to the moving direction of the powder raw material. As shown in FIG. 1, the water vapor outlet 7 is provided more in the vicinity where the raw material supply port 4 and the binder supply port 5 are formed, and the number is smaller on the tip side than that. In addition, as shown in FIG. 2, an auxiliary ejection port 8 that ejects superheated steam or saturated steam from the horizontal direction toward the tip of the screw blade 2 can be provided.

このように構成された加熱混練装置は、原料供給口４から粉体原料を投入し、バインダー供給口５から液状のバインダーを供給し、これらを撹拌手段である２軸のスクリュー羽根２によって搬送しつつ混練するものである。粉体原料は先ず最初の水蒸気噴出口７から噴出される水蒸気により直接加熱され、昇温した状態でバインダーが注入され、さらに２番目の水蒸気噴出口７から噴出される水蒸気により加熱される。このように粉体原料が昇温した状態でバインダーと混練されるため、バインダーの粘性が大きい場合にも粉体原料が塊りとなることはなく、均一に混練される。   The heating and kneading apparatus configured as described above feeds the powder raw material from the raw material supply port 4, supplies the liquid binder from the binder supply port 5, and conveys these by the biaxial screw blades 2 serving as stirring means. While kneading. First, the powder raw material is directly heated by the water vapor ejected from the first water vapor ejection port 7, the binder is injected in a state of being heated, and further heated by the water vapor ejected from the second water vapor ejection port 7. Since the powder raw material is kneaded with the binder in a state where the temperature is raised in this way, the powder raw material does not clump even when the viscosity of the binder is large, and is uniformly kneaded.

また水蒸気は粉体原料に直接通気されるため、広い伝熱面積を確保することができ、熱が粉体原料に速く伝わるため、迅速加熱が可能となる。水蒸気を粉体原料の移動方向に対して直交する方向または傾斜する方向に噴出することにより、並流で噴出するよりも熱効率を高めることができる。その後も混練物はケーシング１の内部を混練物取出し口６まで移動する間に、３番目以降の水蒸気噴出口７から噴出される水蒸気により加熱され続け、均一な混練状態で混練物取出し口６から取出される。特にこの実施形態のように，撹拌手段として２軸のスクリュー羽根２を用いれば、造粒に十分な混練を行なうことができる。   Further, since water vapor is directly ventilated to the powder raw material, a wide heat transfer area can be secured, and heat is quickly transmitted to the powder raw material, so that rapid heating is possible. By ejecting water vapor in a direction perpendicular to or inclining with respect to the moving direction of the powder raw material, thermal efficiency can be improved as compared with the case where the water vapor is ejected in parallel flow. Thereafter, the kneaded material continues to be heated by the water vapor ejected from the third and subsequent water vapor outlets 7 while moving inside the casing 1 to the kneaded material outlet port 6, and in a uniform kneaded state from the kneaded material outlet port 6. Taken out. In particular, if the biaxial screw blade 2 is used as the stirring means as in this embodiment, kneading sufficient for granulation can be performed.

図３、図４は、本発明の第２の実施形態であるバッチ式縦軸ミキサーを示す図面である。１１は縦型円筒状のケーシング、１２はその蓋部である。ケーシング１１の内部には撹拌手段である縦軸の撹拌羽根１３が設けられ、図示を略したモータによって一定方向あるいは一定時間ごとに正逆両方向に回転されている。   3 and 4 are drawings showing a batch type vertical axis mixer according to a second embodiment of the present invention. 11 is a vertical cylindrical casing, and 12 is a lid. Inside the casing 11, a vertical stirring blade 13 serving as a stirring means is provided, and is rotated in both forward and reverse directions by a motor (not shown) in a predetermined direction or every predetermined time.

蓋部１２には、原料供給口１４とバインダー供給口１５と、集塵口１６とが形成されている。集塵口１６には、図示を略した集塵ダクトが接続される。ケーシング１１の底面には、水蒸気噴出口１７が複数個設けられている。水蒸気噴出口１７は第１の実施形態と同様にケーシング１１の内部の粉体原料に向けて、撹拌手段による粉体原料の移動方向に対して直交する方向に、または傾斜する方向に過熱水蒸気もしくは飽和水蒸気を噴出するものである。１８はケーシング１１の下部側面に形成された混練物取出し口、１９は混練物取出し口１８を開閉するドアである。図４に示すように、水蒸気噴出口１７は原料供給口１４の内部あるいはその近傍にも設けることが好ましい。   The lid 12 is formed with a raw material supply port 14, a binder supply port 15, and a dust collection port 16. A dust collection duct (not shown) is connected to the dust collection port 16. A plurality of water vapor outlets 17 are provided on the bottom surface of the casing 11. Similarly to the first embodiment, the water vapor outlet 17 is directed to the powder raw material inside the casing 11 in the direction orthogonal to the moving direction of the powder raw material by the stirring means or in the direction of inclination. Saturated water vapor is ejected. Reference numeral 18 denotes a kneaded product take-out port formed on the lower side surface of the casing 11, and 19 denotes a door for opening and closing the kneaded product take-out port 18. As shown in FIG. 4, the water vapor outlet 17 is preferably provided in the raw material supply port 14 or in the vicinity thereof.

このように構成された加熱混練装置により粉体原料を混練するには、先ず原料供給口１４からケーシング１１の内部に粉体原料を投入した後、底面の水蒸気噴出口１７から過熱水蒸気もしくは飽和水蒸気を噴出するとともに、撹拌羽根１３による撹拌を開始する。粉体原料が所定の温度に到達したら、バインダー供給口１５から液状のバインダーを添加し、水蒸気噴出口１７からの水蒸気の供給を継続しつつ、混練物の温度が造粒に十分な状態となるまでさらに混練を続ける。その後にドア１９を開いて混練物を混練物取出し口１８から取出す。   In order to knead the powder raw material by the heating and kneading apparatus configured as described above, first, the powder raw material is introduced into the casing 11 from the raw material supply port 14, and then superheated steam or saturated steam is supplied from the steam outlet 17 on the bottom surface. And the stirring by the stirring blade 13 is started. When the powder raw material reaches a predetermined temperature, a liquid binder is added from the binder supply port 15, and the temperature of the kneaded product becomes sufficient for granulation while continuing the supply of water vapor from the water vapor outlet 17. Continue kneading until further. Thereafter, the door 19 is opened and the kneaded product is taken out from the kneaded product take-out port 18.

この第２の実施形態の加熱混練装置も第１の実施形態と同様、水蒸気は粉体原料に直接通気されるため、広い伝熱面積を確保することができ、熱が粉体原料に速く伝わるため、迅速加熱が可能となる。また、水蒸気を粉体原料の移動方向に対して直交する方向または傾斜する方向に噴出することにより、並流で噴出するよりも熱効率を高めることができる。さらにケーシング１１の底面に水蒸気噴出口１７を複数個設けたので、処理量の大小にかかわらず確実な伝熱が可能となる。   In the heating and kneading apparatus of the second embodiment, as in the first embodiment, since water vapor is directly ventilated to the powder raw material, a wide heat transfer area can be secured and heat is quickly transferred to the powder raw material. Therefore, rapid heating becomes possible. Further, by ejecting water vapor in a direction orthogonal to or inclined with respect to the moving direction of the powder raw material, the thermal efficiency can be improved as compared with the case where the water vapor is ejected in parallel flow. Further, since a plurality of water vapor jets 17 are provided on the bottom surface of the casing 11, reliable heat transfer is possible regardless of the amount of processing.

このように、本発明の加熱混練装置は、粉体原料を粘度のあるバインダーと効率よく均一に混練することができるものである。   Thus, the heat-kneading apparatus of this invention can knead | mix a powder raw material with a viscous binder efficiently and uniformly.

１ ケーシング
２ スクリュー羽根
３ モータ
４ 原料供給口
５ バインダー供給口
６ 混練物取出し口
７ 水蒸気噴出口
８ 補助噴出口
１１ ケーシング
１２ 蓋部
１３ 撹拌羽根
１４ 原料供給口
１５ バインダー供給口
１６ 集塵口
１７ 水蒸気噴出口
１８ 混練物取出し口
１９ ドア DESCRIPTION OF SYMBOLS 1 Casing 2 Screw blade 3 Motor 4 Raw material supply port 5 Binder supply port 6 Kneaded material taking-out port 7 Water vapor outlet 8 Auxiliary outlet 11 Casing 12 Lid part 13 Stirring blade 14 Raw material supply port 15 Binder supply port 16 Dust collection port 17 Water vapor Spout 18 Kneaded product outlet 19 Door

Claims (4)

粉体原料とバインダーとが供給されるケーシングの内部に、回転する撹拌手段を備えるとともに、ケーシングの底面にはケーシングの内部の粉体原料に向けて、前記撹拌手段による粉体原料の移動方向に対して直行する方向に、過熱水蒸気もしくは飽和水蒸気を噴出する水蒸気噴出口を複数個設けたことを特徴とする水蒸気を加熱源とする加熱混練装置。   A rotating stirring means is provided inside the casing to which the powder raw material and the binder are supplied, and the bottom surface of the casing faces the powder raw material inside the casing in the moving direction of the powder raw material by the stirring means. A heating and kneading apparatus using steam as a heating source, wherein a plurality of steam outlets for jetting superheated steam or saturated steam are provided in a direction perpendicular to the steam. ケーシングが横型の筒状体であり、撹拌手段が２軸の横軸のスクリュー羽根であることを特徴とする請求項１記載の水蒸気を加熱源とする加熱混練装置。   2. The heating and kneading apparatus using steam as a heating source according to claim 1, wherein the casing is a horizontal cylindrical body, and the stirring means is a biaxial screw shaft having a horizontal axis. ケーシングが縦型の容器であり、撹拌手段が縦軸の撹拌羽根であることを特徴とする請求項１記載の水蒸気を加熱源とする加熱混練装置。   The heating and kneading apparatus using steam as a heating source according to claim 1, wherein the casing is a vertical container, and the stirring means is a stirring blade having a vertical axis. 粉体原料が過熱水蒸気もしくは飽和水蒸気との接触により加熱された後にバインダーと混練されることを特徴とする請求項１〜３の何れかに記載の水蒸気を加熱源とする加熱混練装置。   4. The heating and kneading apparatus using steam as a heating source according to claim 1, wherein the powder raw material is heated by contact with superheated steam or saturated steam and then kneaded with a binder.
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