JP7699078B2 - Indirect heating device connection structure - Google Patents
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Description
本発明は、液状原料を間接加熱させる間接加熱装置の連結構造に関するものである。 The present invention relates to a connection structure for an indirect heating device that indirectly heats liquid raw materials.
従来、水平方向に延び、一端側に原料供給孔を有し、他端側に原料排出孔を有するドラムと、前記ドラムの内部で回転する回転軸と、前記回転軸に設けられ、前記原料供給孔から供給された液状原料を、加熱された前記ドラム内面に薄膜状態で押し付けて乾燥させる複数の撹拌羽根と、前記ドラム上側に設けられ、該ドラム内で前記液状原料から蒸発した溶媒が、前記撹拌羽根によって跳ね上げられた液状原料に接触しながら回収される溶媒回収孔とを備えた薄膜式間接加熱装置は知られている（例えば、特許文献１及び２参照）。この薄膜式間接加熱装置の原料排出孔には、スクリュー型間接加熱装置の供給口が密閉状に連結されている。 A thin-film indirect heating device is known that includes a drum that extends horizontally and has a raw material supply hole at one end and a raw material discharge hole at the other end, a rotating shaft that rotates inside the drum, a number of stirring blades that are provided on the rotating shaft and press the liquid raw material supplied from the raw material supply hole in a thin film state against the heated inner surface of the drum to dry it, and a solvent recovery hole that is provided on the upper side of the drum and recovers the solvent that has evaporated from the liquid raw material inside the drum while coming into contact with the liquid raw material splashed up by the stirring blades (see, for example, Patent Documents 1 and 2). The raw material discharge hole of this thin-film indirect heating device is connected to the supply port of a screw-type indirect heating device in a sealed manner.
しかしながら、前記特許文献１及び２のものでは、薄膜式間接加熱装置とスクリュー型間接加熱装置とでそれぞれ液状原料を加熱して間接加熱させるようにしている。 However, in the above-mentioned Patent Documents 1 and 2, the liquid raw material is indirectly heated by a thin-film type indirect heating device and a screw type indirect heating device, respectively.
このため、両者を連結する部分に熱膨張が生じると、その熱膨張を吸収させる構造（例えば蛇腹構造）が必要となったり、加熱温度に合わせてシムによる隙間調整を行う必要があったりする。 For this reason, if thermal expansion occurs in the part connecting the two, a structure to absorb that thermal expansion (such as a bellows structure) may be required, or the gap may need to be adjusted using shims to match the heating temperature.
一方、連結部を蛇腹構造とすると、デッドスペースが発生し、その部分で内部流体が閉塞されるおそれがある。また、加熱温度に合わせたシムによる隙間調整は、大変面倒な作業となる。 On the other hand, if the connection is made with a bellows structure, dead space will be generated, and there is a risk that the internal fluid will be blocked in that area. Also, adjusting the gap with shims to match the heating temperature is a very tedious task.
本発明は、かかる点に鑑みてなされたものであり、その目的とするところは、簡単な構成で容易に連結部の熱膨張による悪影響の発生を防止することにある。 The present invention was made in consideration of these points, and its purpose is to easily prevent the occurrence of adverse effects caused by thermal expansion of the connection part with a simple structure.
上記の目的を達成するために、この発明では、上下方向にスライド可能な排出シュートで上下の間接加熱装置を連結するようにした。 To achieve the above objective, this invention connects the upper and lower indirect heating devices with a discharge chute that can slide vertically.
具体的には、第１の発明では、
水平方向に延び、一端側に第１原料供給孔を有すると共に、他端側に第１原料排出孔を有し、前記第１原料供給孔から供給された液状原料を間接加熱させて前記第１原料排出孔から排出する第１間接加熱装置と、
前記第１間接加熱装置の下側に設けられ、前記第１原料排出孔に連通し、前記第１原料排出孔から排出された液状原料が供給される第２原料供給孔を有すると共に、他端側に第２原料排出孔を有し、前記第２原料供給孔から供給された液状原料を間接加熱して固形分を前記第２原料排出孔から排出する第２間接加熱装置とを備え、
前記第１原料排出孔と前記第２原料供給孔とが、上下方向にスライドして上下方向の長さを変更可能な排出シュートで連結されており、
前記排出シュートが、
前記第１原料排出孔が形成された第１筒状部と、
前記第１筒状部の外径よりも内径が大きな前記第２原料供給孔が形成され、前記第１筒状部にスライド可能に嵌合する第２筒状部と、
前記第１筒状部の外周面と前記第２筒状部の内周面との間に設けられ、前記第１筒状部の外周面と前記第２筒状部の内周面との間の隙間を密閉する封止部材とを備え、
落下する前記液状原料が第２筒状部の上側の端面に衝突しないように構成されている。
Specifically, in the first invention,
a first indirect heating device extending in a horizontal direction, having a first raw material supply hole at one end and a first raw material discharge hole at the other end, indirectly heating a liquid raw material supplied from the first raw material supply hole and discharging the liquid raw material from the first raw material discharge hole;
a second indirect heating device provided below the first indirect heating device, communicating with the first raw material discharge hole, having a second raw material supply hole to which the liquid raw material discharged from the first raw material discharge hole is supplied, and having a second raw material discharge hole on the other end side, indirectly heating the liquid raw material supplied from the second raw material supply hole and discharging a solid content from the second raw material discharge hole,
the first raw material discharge hole and the second raw material supply hole are connected by a discharge chute whose length in the up-down direction can be changed by sliding in the up-down direction,
The discharge chute,
a first cylindrical portion having the first raw material discharge hole formed therein;
a second cylindrical portion having an inner diameter larger than an outer diameter of the first cylindrical portion, the second raw material supply hole being formed therein and slidably fitted into the first cylindrical portion;
a sealing member provided between an outer peripheral surface of the first cylindrical portion and an inner peripheral surface of the second cylindrical portion, the sealing member sealing a gap between the outer peripheral surface of the first cylindrical portion and the inner peripheral surface of the second cylindrical portion,
The dropping liquid raw material is prevented from colliding with the upper end face of the second cylindrical portion.
上記の構成によると、それぞれの間接加熱装置の結合部で熱膨張により上下方向の寸法変化が生じても、排出シュートがスライドしてその寸法変化を吸収できるので、蛇腹構造などの一般的な金属伸縮管を採用したり、シム等による隙間調整をしたりする必要がない。このため、排出シュートの長さを一般的な金属伸縮管に比べて短くすることができ、連結部のデッドスペースを小さくすることができるので、内部流体の閉塞が抑制される。また、運転温度によるシムによる隙間調整などの余分な作業が不要となり、間接加熱装置の運転及び停止操作を簡略化できる。 According to the above configuration, even if the joints of the indirect heating devices change vertically due to thermal expansion, the discharge chute can slide to absorb the change in dimension, so there is no need to use a general metal expansion pipe with a bellows structure or to adjust the gap with a shim or the like. Therefore, the length of the discharge chute can be made shorter than that of a general metal expansion pipe, and the dead space of the joints can be reduced, suppressing blockage of the internal fluid. In addition, extra work such as adjusting the gap with a shim depending on the operating temperature is no longer necessary, simplifying the operation of starting and stopping the indirect heating device .
また、第１筒状部と第２筒状部とが相対的にスライド移動することにより、容易に上下方向の寸法変化を吸収することができる。 Furthermore , the first and second cylindrical portions slide relative to one another, so that dimensional changes in the vertical direction can be easily accommodated.
第２の発明では、第１の発明において、
前記封止部材は、前記第１筒状部及び前記第２筒状部の少なくとも一方に嵌め込まれたＯリングよりなる。
In a second aspect of the present invention, in the first aspect of the present invention,
The sealing member is an O-ring fitted into at least one of the first cylindrical portion and the second cylindrical portion.
上記の構成によると、極めて簡単な構成で第１筒状部と第２筒状部との間の隙間を封止できる。 The above configuration allows the gap between the first and second cylindrical portions to be sealed with a very simple structure.
第３の発明では、第２の発明において、
前記第１筒状部及び前記第２筒状部の少なくとも一方が、前記第１間接加熱装置又は前記第２間接加熱装置の内部を通る熱媒体を内部流通させることで、前記液状原料を加熱可能に構成されている
。
In a third aspect of the present invention, in the second aspect of the present invention,
At least one of the first cylindrical portion and the second cylindrical portion is configured to be able to heat the liquid raw material by circulating a heat medium through the inside of the first indirect heating device or the second indirect heating device.
上記の構成によると、排出シュートにおいても温度調整が行えるので、より確実な間接加熱装置の温度調整を行える。 With the above configuration, temperature control can also be performed in the discharge chute, allowing for more reliable temperature control of the indirect heating device.
以上説明したように、本発明によれば、第１間接加熱装置の第１原料排出孔と第２間接加熱装置の第２原料供給孔とを、上下方向にスライドして上下方向の長さを変更可能な排出シュートで連結したので、蛇腹構造を設ける必要がなくなり、シムによる隙間調整などをする必要もなく、簡単な構成で容易に連結部の熱膨張による悪影響の発生を防止することができる。 As explained above, according to the present invention, the first raw material discharge hole of the first indirect heating device and the second raw material supply hole of the second indirect heating device are connected by a discharge chute that can be slid vertically to change the length in the vertical direction. This eliminates the need for a bellows structure and eliminates the need for gap adjustments using shims, and the simple configuration makes it easy to prevent adverse effects caused by thermal expansion of the connecting parts.
以下、本発明の実施形態を図面に基づいて説明する。 The following describes an embodiment of the present invention with reference to the drawings.
－薄膜式間接加熱装置及びスクリュー型間接加熱装置の構成－
図１は、本発明の実施形態の第１間接加熱装置としての薄膜式間接加熱装置１及びこの薄膜式間接加熱装置１に連結される第２間接加熱装置としてのスクリュー型間接加熱装置２を示す。なお、図１では、見やすいように薄膜式間接加熱装置１とスクリュー型間接加熱装置２とが平行に伸びているように描いているが、平面視で垂直に交わっていてもよい。
- Configuration of thin film type indirect heating device and screw type indirect heating device -
Fig. 1 shows a thin film type indirect heating device 1 as a first indirect heating device according to an embodiment of the present invention, and a screw type indirect heating device 2 as a second indirect heating device connected to the thin film type indirect heating device 1. Note that in Fig. 1, the thin film type indirect heating device 1 and the screw type indirect heating device 2 are drawn to extend in parallel for ease of viewing, but they may intersect perpendicularly in a plan view.
薄膜式間接加熱装置１は、いわゆる横型薄膜蒸発機であり、水平方向（横方向）に延びる中空のドラム３を備えている。ドラム３の一端側の下面には、液状の原料が供給される第１原料供給孔３ａが形成されている。ドラム３の他端側の下面には、溶媒がある程度蒸発して粘度が高くなった原料を排出する第１原料排出孔３ｂが設けられている。ドラム３の外周には、内部に水蒸気、熱水、油などの熱媒体１５が流通する第１ジャケット４が設けられている。ドラム３の内部には、水平に延び、モータ５ａによって回転される回転軸５が設けられている。ドラム３及び回転軸５は、必ずしも完全に水平でなくてもよく、多少傾いていてもよい。 The thin-film indirect heating device 1 is a so-called horizontal thin-film evaporator, and is equipped with a hollow drum 3 extending horizontally (horizontally). A first raw material supply hole 3a is formed on the underside of one end of the drum 3, through which liquid raw material is supplied. A first raw material discharge hole 3b is provided on the underside of the other end of the drum 3, through which raw material with high viscosity is discharged after a certain amount of the solvent has evaporated. A first jacket 4 is provided on the outer periphery of the drum 3, through which a heat medium 15 such as steam, hot water, or oil flows. A rotating shaft 5 that extends horizontally and is rotated by a motor 5a is provided inside the drum 3. The drum 3 and the rotating shaft 5 do not necessarily have to be completely horizontal, and may be slightly tilted.
回転軸５の外周には、所定の間隔を開けてヘラ状の複数の撹拌羽根６が設けられている。詳細な説明は省略するが、例えば円周方向に１８０度の間隔を開けて一対の撹拌羽根６が設けられ、この一対の撹拌羽根６に対して同じく１８０度の間隔を開けた別の一対の撹拌羽根６が、軸方向にほぼ等間隔に間隔を開け、かつ円周方向に９０度ずらして並ぶように配置されている。一対の撹拌羽根６をそれぞれ設ける軸方向の間隔を撹拌羽根６の先端の長さと同等とすることにより、液状の第１原料供給孔３ａから供給された液状原料が第１原料排出孔３ｂに向かう間に、第１ジャケット４により加熱されたドラム３内面に薄膜状態で押し付けられ乾燥されるようになっている。押し付けられた液状原料は、溶媒が気化して徐々に粘度が上昇し、第１原料排出孔３ｂからスクリュー型間接加熱装置２へ送り込まれるようになっている。 On the outer circumference of the rotating shaft 5, a plurality of spatula-shaped stirring blades 6 are provided at a predetermined interval. Although detailed explanation is omitted, for example, a pair of stirring blades 6 is provided at an interval of 180 degrees in the circumferential direction, and another pair of stirring blades 6, which is also spaced 180 degrees apart from this pair of stirring blades 6, is arranged so that they are spaced almost equally apart in the axial direction and shifted by 90 degrees in the circumferential direction. By making the axial interval at which the pair of stirring blades 6 is provided equal to the length of the tip of the stirring blade 6, the liquid raw material supplied from the first raw material supply hole 3a in liquid form is pressed in a thin film state against the inner surface of the drum 3 heated by the first jacket 4 and dried while heading toward the first raw material discharge hole 3b. The pressed liquid raw material gradually increases in viscosity as the solvent evaporates, and is sent to the screw-type indirect heating device 2 from the first raw material discharge hole 3b.
一方、スクリュー型間接加熱装置２は、水平方向に延びる中空状のケーシング７を有し、このケーシング７の外周にも熱媒体１５が流通する第２ジャケット８が設けられている。ケーシング７の一端上側には、上記第１原料排出孔３ｂに密閉状に連結される第２原料供給孔７ａが設けられている。ケーシング７内には、一対の水平に延びる中空スクリュー９が設けられ、これら中空スクリュー９内にも、熱媒体１５が流通可能となっている。一対の中空スクリュー９は、互いに噛み合うように配置され、ケーシング７下部内面とのクリアランスが小さく設定され、セルフクリーニング機能を有している。 On the other hand, the screw-type indirect heating device 2 has a hollow casing 7 extending horizontally, and a second jacket 8 through which the heat medium 15 flows is provided on the outer periphery of the casing 7. A second raw material supply hole 7a is provided on the upper side of one end of the casing 7, and is connected in a sealed manner to the first raw material discharge hole 3b. A pair of hollow screws 9 extending horizontally are provided inside the casing 7, and the heat medium 15 can also flow inside these hollow screws 9. The pair of hollow screws 9 are arranged to mesh with each other, and the clearance with the inner surface of the lower part of the casing 7 is set small, providing a self-cleaning function.
そして、第２ジャケット８及び各中空スクリュー９の内部に水蒸気等の熱媒体１５を通し、一対の中空スクリュー９を互いに逆方向に回転させることにより、ケーシング７の第２原料供給孔７ａから供給された液状原料を中空スクリュー９で第２原料排出孔７ｂへ向けて移送しながら、ケーシング７及び中空スクリュー９からの伝導加熱により液状原料を間接加熱して、第２原料排出孔７ｂから液状原料中の固形分を排出するようになっている。 Then, a heat medium 15 such as steam is passed through the second jacket 8 and inside each hollow screw 9, and the pair of hollow screws 9 are rotated in opposite directions, so that the liquid raw material supplied from the second raw material supply hole 7a of the casing 7 is transported by the hollow screws 9 toward the second raw material discharge hole 7b, while the liquid raw material is indirectly heated by conductive heating from the casing 7 and the hollow screws 9, and the solids in the liquid raw material are discharged from the second raw material discharge hole 7b.
一方、ドラム３上側には、溶媒回収孔１０が設けられている。この溶媒回収孔１０から上方へ溶媒回収管１１が設けられ、この溶媒回収管１１が、図示しない冷却用コンデンサを介して真空ポンプに連結されている。この真空ポンプを駆動することにより、ドラム３及びケーシング７内は負圧になるようになっている。このため、ケーシング７内で気化した溶媒を含むガスは、図１に白抜き矢印で表すように、第２原料供給孔７ａに向かって流れ、第１原料排出孔３ｂからドラム３内へ流入し、ドラム３内で気化した溶媒を含むガスと合流し、溶媒回収孔１０へ吸引されるようになっている。 On the other hand, a solvent recovery hole 10 is provided on the upper side of the drum 3. A solvent recovery pipe 11 is provided upward from this solvent recovery hole 10, and this solvent recovery pipe 11 is connected to a vacuum pump via a cooling condenser (not shown). By driving this vacuum pump, negative pressure is created inside the drum 3 and the casing 7. Therefore, gas containing the solvent vaporized inside the casing 7 flows toward the second raw material supply hole 7a as shown by the white arrow in Figure 1, flows into the drum 3 from the first raw material discharge hole 3b, merges with the gas containing the solvent vaporized inside the drum 3, and is sucked into the solvent recovery hole 10.
溶媒回収管１１は、例えば断面矩形状の管部材よりなり、その下端側には、矩形板状の一対の邪魔板１２が設けられている。この邪魔板１２は、例えばステンレス鋼板よりなり、互いに向かい合うように上下に間隔を開けて設けられ、向かい合う先端がそれぞれ下方へ傾斜している。 The solvent recovery pipe 11 is made of, for example, a pipe member with a rectangular cross section, and a pair of rectangular baffle plates 12 are provided at the lower end side. The baffle plates 12 are made of, for example, stainless steel plates, and are provided facing each other with a gap between them, with the opposing ends inclined downward.
さらに、２枚の邪魔板１２の下流側（上方）には、蒸発した溶媒を含むガスが通過可能なデミスタ１３が配置されていてもよい。このデミスタ１３は、例えば細い金属線のメッシュ状の集合体よりなり、下面は、例えばステンレス製のパンチング板１４で支持されている。 Furthermore, a demister 13 through which gas containing evaporated solvent can pass may be disposed downstream (above) of the two baffle plates 12. This demister 13 is made of, for example, a mesh-like assembly of thin metal wires, and its lower surface is supported by, for example, a stainless steel punched plate 14.
そして、本実施形態の特徴として、第１原料排出孔３ｂと第２原料供給孔７ａとは、上下方向にスライドして上下方向の長さを変更可能な排出シュート２０で連結されている。 A feature of this embodiment is that the first raw material discharge hole 3b and the second raw material supply hole 7a are connected by a discharge chute 20 that can be slid vertically to change the vertical length.
具体的には、図２に示すように、この排出シュート２０は、第１原料排出孔３ｂが形成された円筒形の第１筒状部２１と、第２原料供給孔７ａが形成され、第１筒状部２１にスライド可能に嵌合する、第１筒状部２１の外径よりも若干大きな内径を有する断面円形の第２筒状部２２とを備えている。 Specifically, as shown in FIG. 2, the discharge chute 20 has a cylindrical first tubular portion 21 in which a first raw material discharge hole 3b is formed, and a second tubular portion 22 in which a second raw material supply hole 7a is formed and which is slidably fitted into the first tubular portion 21. The second tubular portion 22 has a circular cross section and an inner diameter slightly larger than the outer diameter of the first tubular portion 21.
例えば、第１筒状部２１は、内径が３６５ｍｍ程度で、外径が３９０ｍｍ、肉厚が１２．５ｍｍのＳＵＳ３１６Ｌの円筒管よりなり、第２筒状部２２は、内径が３９０ｍｍ程度で、外径が４１５ｍｍ、肉厚が１２．５ｍｍのＳＵＳ３１６Ｌの円筒管よりなる。ＳＵＳ３１６Ｌの線膨張係数は、１６．５×１０-６（１/℃）である。第１筒状部２１及び第２筒状部２２の材質は、ＳＵＳ３０４、ＳＵＳ３１６等でもよい。例えば、第１筒状部２１及び第２筒状部２２は、上下中間部分が分割されていて分割部分が互いにフランジで結合されていてもよい。 For example, the first cylindrical portion 21 is made of a SUS316L cylindrical tube with an inner diameter of about 365 mm, an outer diameter of 390 mm, and a wall thickness of 12.5 mm, and the second cylindrical portion 22 is made of a SUS316L cylindrical tube with an inner diameter of about 390 mm, an outer diameter of 415 mm, and a wall thickness of 12.5 mm. The linear expansion coefficient of SUS316L is 16.5 x 10-6 (1/°C). The material of the first cylindrical portion 21 and the second cylindrical portion 22 may be SUS304, SUS316, etc. For example, the first cylindrical portion 21 and the second cylindrical portion 22 may be divided into upper and lower middle portions, and the divided portions may be connected to each other by flanges.
そして、第１筒状部２１と第２筒状部２２との間には、第１筒状部２１と第２筒状部２２との間の隙間を密閉する封止部材としてのＯリング２４が設けられている。このＯリング２４は、小径の第１筒状部２１の外周に周方向に連続して凹陥させた封止用溝部２３に嵌め込まれている。例えば、第１筒状部２１の外周下側に、深さが５ｍｍ程度の断面矩形状の封止用溝部２３が設けられており、この封止用溝部２３に断面の外径が８．４ｍｍのＯリング２４が嵌め込まれている。このＯリング２４で半径方向に３ｍｍ程度の熱膨張又は収縮を吸収することができる。Ｏリング２４の材質は特に限定されないが、耐熱性、耐薬品性等に優れたフッ化ビニリデン系（ＦＫＭ）、テトラフルオロエチレン-パープルオロビニルエーテル系（ＦＦＫＭ）、ポリテトラフルオロエチレン（ＰＴＦＥ）等で構成されている。 Between the first cylindrical portion 21 and the second cylindrical portion 22, an O-ring 24 is provided as a sealing member for sealing the gap between the first cylindrical portion 21 and the second cylindrical portion 22. The O-ring 24 is fitted into a sealing groove 23 that is continuously recessed in the circumferential direction on the outer periphery of the small-diameter first cylindrical portion 21. For example, a sealing groove 23 with a rectangular cross section and a depth of about 5 mm is provided on the lower outer periphery of the first cylindrical portion 21, and an O-ring 24 with an outer diameter of 8.4 mm is fitted into the sealing groove 23. The O-ring 24 can absorb thermal expansion or contraction of about 3 mm in the radial direction. The material of the O-ring 24 is not particularly limited, but it is made of vinylidene fluoride (FKM), tetrafluoroethylene-purple vinyl ether (FFKM), polytetrafluoroethylene (PTFE), etc., which have excellent heat resistance and chemical resistance.
なお、第１筒状部２１の内径が、第２筒状部２２の外径よりも大きくてもよい。この場合には、第２筒状部２２の外周に設けた封止用溝部２３にＯリング２４を嵌め込んで、その外側から第１筒状部２１を挿入するようにすればよい。 The inner diameter of the first cylindrical portion 21 may be larger than the outer diameter of the second cylindrical portion 22. In this case, the O-ring 24 is fitted into the sealing groove 23 provided on the outer periphery of the second cylindrical portion 22, and the first cylindrical portion 21 is inserted from the outside.
第１筒状部２１及び第２筒状部２２の上下方向の長さは、従来のものに比べて短く、例えば、第１筒状部２１の長さが３５ｍｍで、第２筒状部２２の長さが８４ｍｍである。 The vertical lengths of the first cylindrical portion 21 and the second cylindrical portion 22 are shorter than those of conventional ones; for example, the length of the first cylindrical portion 21 is 35 mm, and the length of the second cylindrical portion 22 is 84 mm.
－薄膜式間接加熱装置及びスクリュー型間接加熱装置の作動－
次に、薄膜式間接加熱装置１及びスクリュー型間接加熱装置２を作動させた場合について説明する。
- Operation of thin film type indirect heating device and screw type indirect heating device -
Next, the operation of the thin film type indirect heating device 1 and the screw type indirect heating device 2 will be described.
まず、モータ５ａ等を駆動し、回転軸５及び中空スクリュー９を回転させる。このとき、第１ジャケット４，８及び中空スクリュー９内に水蒸気、熱水などの熱媒体１５を流通させて所定の温度に加熱させておく。 First, the motor 5a and other components are driven to rotate the rotating shaft 5 and hollow screw 9. At this time, a heat medium 15 such as steam or hot water is circulated through the first jackets 4, 8 and hollow screw 9 to heat them to a predetermined temperature.
次いで、第１原料供給孔３ａから液状原料を供給する。液状原料は、例えば、熱可塑性樹脂であり、その粘度は、例えば１０００ｍＰａ・ｓとする。この第１原料供給孔３ａに供給された液状原料は、供給直後は、かなり溶媒を含んでおり、撹拌羽根６によって勢いよく跳ね上げられる。すると、ケーシング７及びドラム３内で液状原料から蒸発した溶媒を含むガスが、撹拌羽根６によって跳ね上げられた液状原料に接触するので、ガス内の粉状原料が液状原料に取り込まれる。溶剤は、特に限定されない。 Next, the liquid raw material is supplied from the first raw material supply hole 3a. The liquid raw material is, for example, a thermoplastic resin, and its viscosity is, for example, 1000 mPa·s. The liquid raw material supplied to the first raw material supply hole 3a contains a large amount of solvent immediately after supply, and is vigorously splashed up by the stirring blade 6. Then, gas containing the solvent evaporated from the liquid raw material in the casing 7 and drum 3 comes into contact with the liquid raw material splashed up by the stirring blade 6, so that the powder raw material in the gas is taken into the liquid raw material. The solvent is not particularly limited.
粉末材料を取り込んだ液状原料は、一対の邪魔板１２のいずれかに衝突し、自重によりドラム３内へ落下する。 The liquid raw material that has absorbed the powder material collides with one of the pair of baffle plates 12 and falls into the drum 3 under its own weight.
そして、一対の邪魔板１２を通過したガス内に飛沫状となった液状原料が含まれていたとしても、ガスがデミスタ１３内を通過する際に、細い金属線に衝突し、金属線の濡れ性や線と線との間の隙間の毛細管現象により、集合して流下し、落下する。 Even if the gas that has passed through the pair of baffle plates 12 contains droplets of liquid raw material, as the gas passes through the demister 13 it collides with the thin metal wires, and due to the wettability of the metal wires and the capillary phenomenon in the gaps between the wires, the droplets gather and flow down, causing them to fall.
そして、粉状原料及び液状原料が取り除かれた、溶媒を含むガスが効率よく回収され、冷却用コンデンサで冷却される。 Then, the gas containing the solvent, from which the powdered and liquid raw materials have been removed, is efficiently recovered and cooled in a cooling condenser.
このような作動を行っている間、薄膜式間接加熱装置１及びスクリュー型間接加熱装置２の連結部である排出シュート２０には、－０．５～０ｋＰａＧの負圧で、液状原料及び溶媒ガスが流通する。温度は最大で２５０℃まで上昇する。このため、第１筒状部２１及び第２筒状部２２がそれぞれ上下方向に加熱により、第１筒状部２１及び第２筒状部２２で合わせて最大で例えば３．５ｍｍ程度伸びる。 During such operation, the liquid raw material and the solvent gas flow through the discharge chute 20, which is the connecting part between the thin film type indirect heating device 1 and the screw type indirect heating device 2, at a negative pressure of -0.5 to 0 kPaG. The temperature rises to a maximum of 250°C. As a result, the first cylindrical portion 21 and the second cylindrical portion 22 are heated in the vertical direction, and the first cylindrical portion 21 and the second cylindrical portion 22 are expanded by a maximum of, for example, about 3.5 mm in total.
しかしながら本実施形態では、それぞれの間接加熱装置１，２で熱膨張により上下方向の寸法変化が生じても、排出シュート２０がスライドしてその寸法変化を吸収できるので、蛇腹構造などの一般的な金属伸縮管を採用したり、シム等による隙間調整をしたりする必要がない。このため、排出シュート２０の長さを一般的な金属伸縮管に比べて短くすることができ、連結部のデッドスペースを小さくすることができ、内部流体の閉塞が抑制される。また、運転温度によるシムによる隙間調整などの余分な作業が不要となり、間接加熱装置の運転及び停止操作を簡略化できる。 However, in this embodiment, even if vertical dimensional changes occur in each of the indirect heating devices 1, 2 due to thermal expansion, the discharge chute 20 can slide to absorb the dimensional changes, so there is no need to use a typical metal expansion tube with a bellows structure or to adjust the gap with shims or the like. As a result, the length of the discharge chute 20 can be made shorter than that of a typical metal expansion tube, the dead space at the connection can be reduced, and blockage of the internal fluid is suppressed. In addition, extra work such as adjusting the gap with shims depending on the operating temperature is no longer necessary, simplifying the operation of starting and stopping the indirect heating device.
特に本実施形態では、円筒状の第１筒状部２１と、円筒状の第２筒状部２２とが相対的に上下にスライド移動することにより、容易に上下方向の寸法変化を吸収することができる。 In particular, in this embodiment, the first cylindrical portion 21 and the second cylindrical portion 22 slide vertically relative to each other, so that dimensional changes in the vertical direction can be easily absorbed.
さらに本実施形態では、封止用溝部２３を形成し、その封止用溝部２３にＯリング２４を嵌めるという、極めて簡単な構成で第１筒状部２１と第２筒状部２２との間の隙間を封止できる。 Furthermore, in this embodiment, the gap between the first cylindrical portion 21 and the second cylindrical portion 22 can be sealed with an extremely simple configuration of forming a sealing groove portion 23 and fitting an O-ring 24 into the sealing groove portion 23.
したがって、本実施形態にかかる薄膜式間接加熱装置１によると、第１原料排出孔３ｂと第２原料供給孔７ａとを、上下方向にスライドして上下方向の長さを変更可能な排出シュート２０で連結したので、蛇腹構造を設ける必要がなくなり、シムによる隙間調整などをする必要もなく、簡単な構成で容易に連結部の熱膨張による悪影響の発生を防止することができる。 Therefore, in the thin-film indirect heating device 1 according to this embodiment, the first raw material discharge hole 3b and the second raw material supply hole 7a are connected by a discharge chute 20 that can be slid vertically to change its vertical length, eliminating the need for a bellows structure and eliminating the need for gap adjustments using shims, and making it possible to easily prevent adverse effects caused by thermal expansion of the connection with a simple configuration.
（その他の実施形態）
本発明は、上記実施形態について、以下のような構成としてもよい。
Other Embodiments
The present invention may be configured as follows with respect to the above embodiment.
すなわち、上記実施形態では、封止部材として断面円形のＯリング２４を用いたが、第１筒状部２１と第２筒状部２２との間の封止が可能で、第１筒状部２１と第２筒状部２２との上下方向のスライド移動を阻害しないものであれば、Ｘリングなど他の封止部材で構成してもよい。 In other words, in the above embodiment, an O-ring 24 with a circular cross section is used as the sealing member, but other sealing members such as an X-ring may be used as long as they are capable of sealing between the first cylindrical portion 21 and the second cylindrical portion 22 and do not impede the sliding movement of the first cylindrical portion 21 and the second cylindrical portion 22 in the vertical direction.
上記実施形態では、第１筒状部２１及び第２筒状部２２は、簡易な金属管で構成しているが、それらの少なくとも一方にジャケットを設け、薄膜式間接加熱装置１又はスクリュー型間接加熱装置２の内部を通る熱媒体を内部に流通させることで、排出シュート２０内を通る液状原料を加熱可能に構成してもよい。こうすると、排出シュート２０においても温度調整が行えるので、より確実な間接加熱装置の温度調整を行えて有利である。 In the above embodiment, the first cylindrical portion 21 and the second cylindrical portion 22 are made of simple metal pipes, but at least one of them may be provided with a jacket and a heat medium passing through the inside of the thin film type indirect heating device 1 or the screw type indirect heating device 2 may be circulated therethrough to heat the liquid raw material passing through the discharge chute 20. In this way, temperature control can also be performed in the discharge chute 20, which is advantageous in that the temperature control of the indirect heating device can be performed more reliably.
上記実施形態では、液状原料の乾燥を目的とした間接加熱装置を対象としたが、他の原料で混練、反応させてもよく、その場合も温度変化による寸法変化（上下方向だけでなく、水平方向でもよい）を吸収できる。 In the above embodiment, the indirect heating device is intended for drying liquid raw materials, but it may also be used for kneading and reacting other raw materials, and in that case, it can also absorb dimensional changes due to temperature changes (not only in the vertical direction but also in the horizontal direction).
なお、以上の実施形態は、本質的に好ましい例示であって、本発明、その適用物や用途の範囲を制限することを意図するものではない。 Note that the above embodiments are essentially preferred examples and are not intended to limit the scope of the present invention, its applications, or uses.
１ 薄膜式間接加熱装置（第１間接加熱装置）
２ スクリュー型間接加熱装置（第２間接加熱装置）
３ ドラム
３ａ 第１原料供給孔
３ｂ 第１原料排出孔
４ 第１ジャケット
５ 回転軸
５ａ モータ
６ 撹拌羽根
７ ケーシング
７ａ 第２原料供給孔
７ｂ 第２原料排出孔
８ 第２ジャケット
９ 中空スクリュー
１０ 溶媒回収孔
１１ 溶媒回収管
１２ 邪魔板
１３ デミスタ
１４ パンチング板
１５ 熱媒体
２０ 排出シュート
２１ 第１筒状部
２２ 第２筒状部
２３ 封止用溝部
２４ Ｏリング
1 Thin film indirect heating device (first indirect heating device)
2. Screw type indirect heating device (second indirect heating device)
3. Drums
3a First raw material supply hole
3b First raw material discharge hole
4. First Jacket
5. Rotation axis
5a Motor
6 Stirring blade
7 Casing
7a Second raw material supply hole
7b Second raw material discharge hole
8. Second Jacket
9 Hollow screw
10 Solvent recovery hole
11 Solvent recovery pipe
12 Baffle plate
13 Demistar
14 Punching plate
15 Heat medium
20. Ejection Chute
21 First cylindrical portion
22 Second cylindrical portion
23 Sealing groove
24 O-ring
Claims (3)
前記第１間接加熱装置の下側に設けられ、前記第１原料排出孔に連通し、前記第１原料排出孔から排出された液状原料が供給される第２原料供給孔を有すると共に、他端側に第２原料排出孔を有し、前記第２原料供給孔から供給された液状原料を間接加熱して固形分を前記第２原料排出孔から排出する第２間接加熱装置とを備え、
前記第１原料排出孔と前記第２原料供給孔とが、上下方向にスライドして上下方向の長さを変更可能な排出シュートで連結されており、
前記排出シュートが、
前記第１原料排出孔が形成された第１筒状部と、
前記第１筒状部の外径よりも内径が大きな前記第２原料供給孔が形成され、前記第１筒状部にスライド可能に嵌合する第２筒状部と、
前記第１筒状部の外周面と前記第２筒状部の内周面との間に設けられ、前記第１筒状部の外周面と前記第２筒状部の内周面との間の隙間を密閉する封止部材とを備え、
落下する前記液状原料が第２筒状部の上側の端面に衝突しないように構成されている
ことを特徴とする間接加熱装置の連結構造。 a first indirect heating device extending in a horizontal direction, having a first raw material supply hole at one end and a first raw material discharge hole at the other end, indirectly heating a liquid raw material supplied from the first raw material supply hole and discharging the liquid raw material from the first raw material discharge hole;
a second indirect heating device provided below the first indirect heating device, communicating with the first raw material discharge hole, having a second raw material supply hole to which the liquid raw material discharged from the first raw material discharge hole is supplied, and having a second raw material discharge hole on the other end side, indirectly heating the liquid raw material supplied from the second raw material supply hole and discharging a solid content from the second raw material discharge hole,
the first raw material discharge hole and the second raw material supply hole are connected by a discharge chute whose length in the up-down direction can be changed by sliding in the up-down direction,
The discharge chute,
a first cylindrical portion having the first raw material discharge hole formed therein;
a second cylindrical portion having an inner diameter larger than an outer diameter of the first cylindrical portion, the second raw material supply hole being formed therein and slidably fitted into the first cylindrical portion;
a sealing member provided between an outer peripheral surface of the first cylindrical portion and an inner peripheral surface of the second cylindrical portion, the sealing member sealing a gap between the outer peripheral surface of the first cylindrical portion and the inner peripheral surface of the second cylindrical portion,
13. A connection structure for an indirect heating device, characterized in that the connection structure is configured so that the falling liquid raw material does not collide with the upper end surface of the second cylindrical portion.
ことを特徴とする請求項１に記載の間接加熱装置の連結構造。 2. The connection structure of an indirect heating device according to claim 1 , wherein the sealing member is an O-ring fitted in at least one of the first cylindrical portion and the second cylindrical portion.
ことを特徴とする請求項２に記載の間接加熱装置の連結構造。 The connecting structure of the indirect heating device as described in claim 2, characterized in that at least one of the first cylindrical portion and the second cylindrical portion is configured to be able to heat the liquid raw material by internally circulating a heat medium passing through the inside of the first indirect heating device or the second indirect heating device.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001336728A (en) | 2000-05-30 | 2001-12-07 | Takuma Co Ltd | Chute for charging substance to be processed in furnace |
| JP2008008487A (en) | 2006-05-31 | 2008-01-17 | Asahi Organic Chem Ind Co Ltd | Tube connection construction |
| JP2014163645A (en) | 2013-02-27 | 2014-09-08 | Kurimoto Ltd | Dryer |
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| JPS60159289U (en) * | 1984-04-02 | 1985-10-23 | 三菱重工業株式会社 | Joint structure of sludge transport piping |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001336728A (en) | 2000-05-30 | 2001-12-07 | Takuma Co Ltd | Chute for charging substance to be processed in furnace |
| JP2008008487A (en) | 2006-05-31 | 2008-01-17 | Asahi Organic Chem Ind Co Ltd | Tube connection construction |
| JP2014163645A (en) | 2013-02-27 | 2014-09-08 | Kurimoto Ltd | Dryer |
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