JPH0518601U - Centrifugal sprayer sprayer - Google Patents

Centrifugal sprayer sprayer

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Publication number
JPH0518601U
JPH0518601U JP6910691U JP6910691U JPH0518601U JP H0518601 U JPH0518601 U JP H0518601U JP 6910691 U JP6910691 U JP 6910691U JP 6910691 U JP6910691 U JP 6910691U JP H0518601 U JPH0518601 U JP H0518601U
Authority
JP
Japan
Prior art keywords
disc
spraying
spray
sprayer
centrifugal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6910691U
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Japanese (ja)
Other versions
JP2594499Y2 (en
Inventor
光明 北野
光弘 武田
久雄 矢野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP1991069106U priority Critical patent/JP2594499Y2/en
Publication of JPH0518601U publication Critical patent/JPH0518601U/en
Application granted granted Critical
Publication of JP2594499Y2 publication Critical patent/JP2594499Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

(57)【要約】 【構成】下円板1および上円板2の周縁部に設けた環状
壁3に複数の噴霧孔5を形成してなる噴霧盤9におい
て、少なくとも下円板1を回転軸4の法線方向に対して
下方に傾斜させる。 【効果】噴霧液滴の粒径ばらつきを小さくし、乾燥後の
粒子の粒度分布を狭くすることができる。
(57) [Summary] [Structure] At least a lower disc 1 is rotated in a spray disc 9 in which a plurality of spray holes 5 are formed in an annular wall 3 provided on the peripheral portions of a lower disc 1 and an upper disc 2. It is inclined downward with respect to the normal direction of the shaft 4. [Effect] It is possible to reduce variations in particle diameter of sprayed droplets and narrow the particle size distribution of particles after drying.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業用の利用分野】[Industrial applications]

本考案は、薬剤、食料品などの原液、及びセラミックスのスラリーの噴霧乾燥 装置における遠心噴霧機の噴霧盤に関するものである。 The present invention relates to a spraying plate of a centrifugal sprayer in a spray-drying device for a drug solution, an undiluted solution of foodstuffs, and a slurry of ceramics.

【0002】[0002]

【従来の技術】[Prior Art]

従来この種の噴霧盤は、図5に示すような下円盤11、上円盤12の周縁部に 環状壁13を形成し、この環状壁13に複数の長孔形状をした噴霧孔15を備え たものであった。また、この他、図6に示すごとき構造のケスナー型噴霧盤20 も知られている(実公昭61−10767号、実開昭62−179052参照) 。 Conventionally, this type of spraying disk has an annular wall 13 formed on the peripheral portions of a lower disk 11 and an upper disk 12 as shown in FIG. 5, and the annular wall 13 is provided with a plurality of spray holes 15 having a long hole shape. It was a thing. In addition, a Kessner type sprayer 20 having a structure as shown in FIG. 6 is also known (see Japanese Utility Model Publication No. 61-10767 and Japanese Utility Model Publication No. 62-179052).

【0003】 これらの噴霧盤を用いた遠心噴霧装置は、図7に示すような構造となっていた 。回転軸4によって高速回転する噴霧盤9に、原液供給管8から供給された原液 は噴霧乾燥室10に微粒子となって噴霧され、熱風入口11から噴霧乾燥室10 に送られた熱風によって乾燥されて粉粒体となって落下し、製品取り出し口12 から取り出される。一方排気は排気管13を通りサイクロン14で粉粒体が分離 、回収されて排出される。そして、上記原液として例えばセラミックスラリーを 用いれば、セラミック原料の造粒、乾燥を行うことができる。A centrifugal spraying device using these spraying disks has a structure as shown in FIG. The undiluted solution supplied from the undiluted solution supply pipe 8 is sprayed into the spray drying chamber 10 as fine particles on the spray disk 9 which rotates at a high speed by the rotating shaft 4, and is dried by the hot air sent from the hot air inlet 11 to the spray drying room 10. As a result, it falls into a granular material and is taken out from the product take-out port 12. On the other hand, the exhaust gas passes through the exhaust pipe 13 and is separated and collected by the cyclone 14 to be discharged. If a ceramic slurry is used as the stock solution, the ceramic raw material can be granulated and dried.

【0004】[0004]

【従来の技術の課題】[Problems of conventional technology]

ところが、図5に示す従来の噴霧盤にて噴霧する場合、原液が下円板11の平 面上を流れ、縦方向に形成された噴霧孔15に至った時に初めて平面より縦の変 化となるため、噴霧孔15の下側において原液液膜は厚く、噴霧孔15の上側に なるにつれて薄くなる。このために、噴霧孔15の下側より噴霧された微小液滴 は粒径が大きく、上側より噴霧された微小液滴は粒径が小さくなって、噴霧され た微小液滴の粒径バラツキが大きく、乾燥後の粒子の粒度分布が広いという問題 点があった。 However, when spraying with the conventional sprayer shown in FIG. 5, the undiluted solution flows vertically on the flat surface of the lower disk 11 and reaches the spray hole 15 formed in the vertical direction. Therefore, the undiluted liquid film is thicker on the lower side of the spray hole 15 and thinner on the upper side of the spray hole 15. For this reason, the fine droplets sprayed from the lower side of the spray hole 15 have a large particle diameter, and the fine droplets sprayed from the upper side have a small particle diameter. There is a problem that the particles are large and have a wide particle size distribution after drying.

【0005】 この乾燥粒子のうち、最終的に必要とされる粒子径以上の粗粒は篩メッシュに よりカットされ、無駄なものとなってしまう。そこで、この粗粒を減少させる手 段としては、原液処理量を減少させるか、噴霧盤の回転数を高める必要があるが 、結果として、粗粒は僅か減少するものの、生産性が著しく低下し、噴霧装置の 損耗を早めてしまったり、粒子分布も必要以上に細かな方向に偏ってしまうとい う問題があった。Of these dry particles, coarse particles having a particle size that is finally required or larger are cut by the sieve mesh and become useless. Therefore, as a means to reduce the coarse particles, it is necessary to reduce the amount of stock solution to be treated or increase the number of revolutions of the spraying machine.As a result, although the coarse particles are slightly reduced, the productivity is remarkably reduced. However, there were problems that the wear of the atomizer was accelerated and the particle distribution was biased in a finer direction than necessary.

【0006】[0006]

【課題を解決するための手段】[Means for Solving the Problems]

上記問題に鑑みて本考案は、遠心式噴霧装置の噴霧盤を構成する下板円を回転 軸と垂直な方向に対して下方に傾斜させたものである。 In view of the above problems, the present invention is one in which a lower plate circle constituting a spraying disc of a centrifugal spraying device is inclined downward with respect to a direction perpendicular to a rotation axis.

【0007】[0007]

【作用】[Action]

本考案の噴霧盤に導入される原液は、噴霧盤の回転と傾斜角により、まず下円 板に沿って液膜となって流れ、更に遠心力を受けこの下円板より離脱して水平方 向に飛散し、下円板の終縁に設けた環状壁全面に均一に供給され、この壁を介し て外方に微粒化して噴霧される。したがって、噴霧された微少液滴の粒径バラツ キが小さく、乾燥粒子の粒度分布を狭くできる。 The undiluted solution introduced into the spraying disc of the present invention first flows as a liquid film along the lower disc due to the rotation and tilt angle of the spraying disc, and is further separated from this lower disc by a centrifugal force to move horizontally. The particles are scattered in the same direction and are evenly supplied to the entire surface of the annular wall provided at the end edge of the lower disk, and atomized outward through this wall. Therefore, the particle size variation of the sprayed fine droplets is small, and the particle size distribution of the dry particles can be narrowed.

【0008】[0008]

【実施例】【Example】

以下、本考案を図示の実施例に基づき更に詳細に説明するが、本考案はこれら の実施例に限られるものではない。 Hereinafter, the present invention will be described in more detail based on the illustrated embodiments, but the present invention is not limited to these embodiments.

【0009】 図1は本考案の噴霧盤9の断面概要図であり、この噴霧盤9は下円板1、上円 板2とこれらの周縁に備えられた環状壁3からなり、該環状壁3には複数の長孔 状の噴霧孔5が形成されている。そして、上記下円板1と上円板2は回転軸4の 法線方向に対して、それぞれ傾斜角度θ1、θ2で下方に傾斜しており、下円板 1の傾斜角度θ1は2〜45°、好ましくは2〜30°となっている。また、上 円板2についても上記下円板1と同程度の角度θ2で傾斜させてある。なお、こ の上円板2ついては傾斜させておくことが望ましいが、必ずしも傾斜させる必要 はない。FIG. 1 is a schematic cross-sectional view of a spraying disc 9 of the present invention. The spraying disc 9 comprises a lower disc 1, an upper disc 2 and an annular wall 3 provided around these discs. A plurality of spray holes 5 having a long hole shape are formed in 3. The lower disc 1 and the upper disc 2 are inclined downward with respect to the normal direction of the rotary shaft 4 by inclination angles θ1 and θ2, respectively, and the inclination angle θ1 of the lower disc 1 is 2 to 45. And preferably 2 to 30 °. Further, the upper disc 2 is also inclined at an angle θ2 which is substantially the same as that of the lower disc 1. In addition, although it is desirable to incline this upper disc 2, it is not always necessary to incline it.

【0010】 また、下円板1の周縁部の環状壁3の断面形状は特に限定されず、図2(A) (B)に示したごとく矩形または台形形状などとすることができる。また、この 環状壁3の幅Wは5mm以上であればよい。さらに、噴霧口5の高さHは噴霧盤 半径Rに対し10〜50%が望ましい。Further, the cross-sectional shape of the annular wall 3 at the peripheral portion of the lower disc 1 is not particularly limited, and may be rectangular or trapezoidal as shown in FIGS. 2 (A) and 2 (B). The width W of the annular wall 3 may be 5 mm or more. Further, the height H of the spray port 5 is preferably 10 to 50% with respect to the radius R of the spray disk.

【0011】 また、他の実施例として、図3に示したごとく下円板1、上円板2を各々曲面 形状として下方に傾斜させることも可能である。この場合は、下円板1の中心部 と周縁部を結ぶ直線と、回転軸の法線とのなす角度を傾斜角度θ1とする。Further, as another embodiment, as shown in FIG. 3, the lower disc 1 and the upper disc 2 may each be curved and inclined downward. In this case, the angle formed by the straight line connecting the central portion and the peripheral portion of the lower disk 1 and the normal line of the rotation axis is the inclination angle θ1.

【0012】 次に、上記本考案の噴霧盤9を用いた遠心式噴霧乾燥装置の作動を説明する。 図7に示すように、まず原液供給管8から供給された原液は液分配器を経由し て本考案の噴霧盤9から噴霧乾燥室10に微粒子となって噴霧され、熱風入口1 1から噴霧乾燥室10に送られた熱風によって乾燥されて粉粒体となって落下し 、製品取り出し口12から取り出される。一方排気は排気管13を通りサイクロ ン14で粉粒体を分離、回収されて排出される。Next, the operation of the centrifugal spray dryer using the spray disc 9 of the present invention will be described. As shown in FIG. 7, the undiluted solution supplied from the undiluted solution supply pipe 8 is first atomized into fine particles from the spray disc 9 of the present invention into the spray drying chamber 10 through the liquid distributor, and is sprayed from the hot air inlet 11. The powder is dried by the hot air sent to the drying chamber 10, falls into a powder or granular material, and falls and is taken out from the product taking-out port 12. On the other hand, the exhaust gas passes through the exhaust pipe 13 and is separated and collected by the cyclone 14 to be discharged.

【0013】 このとき、図4に示すように、噴霧盤9に供給された原液Gは下円板1に沿っ て液膜状となって流れるが、下円板1が下方に傾斜しているため噴霧盤9の回転 による遠心力によって、原液Gは次第に下円板1より離脱して水平方向に飛散し 、周縁壁3全面に均一に供給され、噴霧口5から噴霧乾燥室10内に噴霧される 。このように、原液Gが周縁壁3の高さ方向に均一に供給されて噴霧されるため 、噴霧孔5の下側から噴霧される液滴と上側から噴霧される液滴の粒径がほぼ同 じとなり、噴霧液滴の粒径バラツキを小さくすることができるため、乾燥後の粒 子の粒度分布を狭くできる。At this time, as shown in FIG. 4, the undiluted solution G supplied to the spray disc 9 flows in the form of a liquid film along the lower disc 1, but the lower disc 1 is inclined downward. Therefore, due to the centrifugal force generated by the rotation of the spraying disc 9, the undiluted solution G gradually separates from the lower disc 1 and horizontally scatters, is uniformly supplied to the entire peripheral wall 3, and is sprayed from the spraying port 5 into the spray drying chamber 10. Be done. In this way, since the undiluted solution G is uniformly supplied and sprayed in the height direction of the peripheral wall 3, the particle diameters of the droplets sprayed from the lower side of the spray hole 5 and the droplets sprayed from the upper side are almost the same. In the same manner, it is possible to reduce the particle size variation of the sprayed droplets, so that the particle size distribution of the dried particles can be narrowed.

【0014】実験例 原液Gとして、アルミナを60重量%含む比重1.6、粘度30センチポイズ のスラリーを用いて噴霧実験を行った。本考案の噴霧盤9として、図1に示す形 状で直径100mm、下円板1の傾斜角度θ1は3°のものを用意し、比較例と して図5に示す従来の噴霧盤を用いて、同一条件で上記スラリーを噴霧乾燥し、 乾燥後の粒子の粒度分布を比較した。結果は図8に示すように、本考案の噴霧盤 を用いることによって、乾燥粒子の粒度分布を狭くできることがわかる。 Experimental Example A spraying experiment was conducted using a stock solution G containing 60% by weight of alumina and having a specific gravity of 1.6 and a viscosity of 30 centipoise. As the sprayer 9 of the present invention, a sprayer having a shape shown in FIG. 1 and a diameter of 100 mm and an inclination angle θ1 of the lower disc 1 of 3 ° is prepared, and a conventional sprayer shown in FIG. 5 is used as a comparative example. Then, the above slurry was spray-dried under the same conditions, and the particle size distribution of the dried particles was compared. The results, as shown in FIG. 8, show that the particle size distribution of dry particles can be narrowed by using the spraying disk of the present invention.

【0015】 また、上記と同様にして、下円板1の傾斜角度θ1をさまざまに変化させて実 験を行った。その結果、スラリーの状態によっても異なるが、傾斜角度θ1が2 °より小さいと乾燥粒子の粒度分布を狭くする効果が乏しかった。逆に、傾斜角 度θ1が大きいと、原液Gが上円板2側に多く供給されるため、かえって乾燥粒 子の粒度分布が広くなる傾向があり、傾斜角度θ1は45°以下、好ましくは3 0°以下のものが良かった。Further, in the same manner as described above, an experiment was conducted by changing the inclination angle θ1 of the lower disc 1 in various ways. As a result, although it depends on the state of the slurry, when the tilt angle θ1 is smaller than 2 °, the effect of narrowing the particle size distribution of dry particles was poor. On the contrary, when the inclination angle θ1 is large, the stock solution G is supplied to the upper disc 2 side in a large amount, which tends to widen the particle size distribution of the dry particles, and the inclination angle θ1 is 45 ° or less, preferably Those of 30 ° or less were good.

【0016】[0016]

【考案の効果】[Effect of the device]

このように、本考案によれば遠心式噴霧装置の噴霧盤において、下円板を回転 軸の法線方向に対して下方に傾斜させたことによって、噴霧液滴の粒径バラツキ を小さくでき、噴霧乾燥後の粒子の粒度分布を狭くすることができる。したがっ て、乾燥後の原料中に含まれる粗粒を少なくし、原料の無駄を減らすとともに、 特にセラミックスラリーの噴霧乾燥に用いた場合は、粒径の揃った高品質の造粒 体を得ることができる。 As described above, according to the present invention, in the spraying disc of the centrifugal spraying device, the lower disk is inclined downward with respect to the normal direction of the rotation axis, so that the variation in the particle size of the spray droplets can be reduced. The particle size distribution of the particles after spray drying can be narrowed. Therefore, the coarse particles contained in the raw material after drying are reduced, the waste of the raw material is reduced, and in particular, when it is used for spray drying of ceramic slurry, a high-quality granule having a uniform particle diameter can be obtained. You can

【図面の簡単な説明】[Brief description of drawings]

【図1】本考案実施例に係る遠心式噴霧装置の噴霧盤を
示す部分断面図である。
FIG. 1 is a partial cross-sectional view showing a spraying disc of a centrifugal spraying device according to an embodiment of the present invention.

【図2】(A)(B)は図1中のA部のみを示す断面図
である。
2 (A) and 2 (B) are cross-sectional views showing only part A in FIG.

【図3】本考案の他の実施例を示す部分断面図である。FIG. 3 is a partial sectional view showing another embodiment of the present invention.

【図4】図1に示す噴霧盤の使用状態を説明するための
図である。
FIG. 4 is a view for explaining a usage state of the spraying disk shown in FIG.

【図5】従来の遠心式噴霧装置の噴霧盤を示す部分断面
図である。
FIG. 5 is a partial cross-sectional view showing a spraying disc of a conventional centrifugal spraying device.

【図6】従来の遠心式噴霧装置の噴霧盤を示す部分断面
図である。
FIG. 6 is a partial cross-sectional view showing a spraying disc of a conventional centrifugal spraying device.

【図7】遠心式噴霧乾燥装置を示す概要図である。FIG. 7 is a schematic view showing a centrifugal spray dryer.

【図8】噴霧乾燥後の粒子の粒度分布を示すグラフであ
る。
FIG. 8 is a graph showing a particle size distribution of particles after spray drying.

【符号の説明】[Explanation of symbols]

1・・・下円板 2・・・上円板 3・・・環状壁 4・・・回転軸 5・・・噴霧孔 8・・・原液供給管 9・・・噴霧盤 10・・噴霧乾燥室 11・・熱風入口 12・・製品取り出し口 13・・排気管 14・・サイクロン 1 ... Lower disc 2 ... Upper disc 3 ... Annular wall 4 ... Rotating shaft 5 ... Spraying hole 8 ... Stock solution supply pipe 9 ... Spraying disk 10 ... Spray drying Room 11 ... Hot air inlet 12 ... Product outlet 13 ... Exhaust pipe 14 ... Cyclone

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】下円板および上円板の周縁部に設けた環状
壁に複数の噴霧孔を形成してなる噴霧盤において、少な
くとも上記下円板を回転軸の垂直方向に対して下方に傾
斜させたことを特徴とする遠心式噴霧装置の噴霧盤。
1. A spraying disc comprising a plurality of spray holes formed in annular walls provided at peripheral portions of a lower disc and an upper disc, wherein at least the lower disc is placed downward with respect to a direction perpendicular to a rotation axis. A spraying plate for a centrifugal spraying device, which is inclined.
JP1991069106U 1991-08-29 1991-08-29 Spray board of centrifugal spray device Expired - Fee Related JP2594499Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1991069106U JP2594499Y2 (en) 1991-08-29 1991-08-29 Spray board of centrifugal spray device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1991069106U JP2594499Y2 (en) 1991-08-29 1991-08-29 Spray board of centrifugal spray device

Publications (2)

Publication Number Publication Date
JPH0518601U true JPH0518601U (en) 1993-03-09
JP2594499Y2 JP2594499Y2 (en) 1999-04-26

Family

ID=13393048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1991069106U Expired - Fee Related JP2594499Y2 (en) 1991-08-29 1991-08-29 Spray board of centrifugal spray device

Country Status (1)

Country Link
JP (1) JP2594499Y2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS508243U (en) * 1973-05-21 1975-01-28
JPS5246547A (en) * 1975-10-09 1977-04-13 Matsushita Electric Ind Co Ltd Hot wter heating system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS508243U (en) * 1973-05-21 1975-01-28
JPS5246547A (en) * 1975-10-09 1977-04-13 Matsushita Electric Ind Co Ltd Hot wter heating system

Also Published As

Publication number Publication date
JP2594499Y2 (en) 1999-04-26

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