JPH1128390A - Rotary atomizer - Google Patents

Rotary atomizer

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Publication number
JPH1128390A
JPH1128390A JP18792397A JP18792397A JPH1128390A JP H1128390 A JPH1128390 A JP H1128390A JP 18792397 A JP18792397 A JP 18792397A JP 18792397 A JP18792397 A JP 18792397A JP H1128390 A JPH1128390 A JP H1128390A
Authority
JP
Japan
Prior art keywords
rotor
rotating body
air
diameter
small
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.)
Pending
Application number
JP18792397A
Other languages
Japanese (ja)
Inventor
Masatsugu Takahashi
正嗣 高橋
Shinichi Murata
進一 村田
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP18792397A priority Critical patent/JPH1128390A/en
Publication of JPH1128390A publication Critical patent/JPH1128390A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To jet a highly viscous substance into fine particles at an optional angle by providing a rotor with a plurality of small diameter through-holes running through from an upper face to a lower face on the lower section of a hollow cylindrical casing with a liquid feed opening and an air feed opening and rotating the rotor at high speed. SOLUTION: When a driving high speed rotor 1 is rotated at high speed, the rotor 7 connected directly with its rotating shaft 2 is rotated at high speed. When a liquid is fed from a liquid feed opening 5 into the hollow cylindrical case 3 and air is fed from an air feed opening 6 into the casing respectively in the above state, the liquid and the air are passed through a communication hole 4 and introduced into the rotor 7 and jetted out of small diameter through- holes 8 formed on the lower section of the rotor 7. At that time, in the case the air is not accompanied, jet droplets are scattered almost in the horizontal direction by the action of powerful centrifugal force generated by the high speed rotation of the rotor 7, while in the case of accompanying the air, the velocity component in the vertical shaft direction is provided and the droplets are jetted out in an atomizing pattern by the optional angle.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は噴霧乾燥分野で使用
される液体微粒化装置、特に高粘性液状物質の微粒化に
適した液体微粒化装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid atomizer used in the spray drying field, and more particularly to a liquid atomizer suitable for atomizing highly viscous liquid substances.

【0002】[0002]

【従来の技術】液状物質の噴霧乾燥分野では圧力噴霧ノ
ズルとロータリーアトマイザーが広く使われている。近
年、大容量の噴霧乾燥機では扱いが容易で噴霧液滴の広
がり範囲の狭い圧力噴霧ノズルが主流となってきている
が、小容量機ではロータリーアトマイザーが今なお多く
使われている。圧力噴霧ノズルは扱いが容易で、粒子径
分布も良好である反面、高粘性液の微粒化には適してい
ない。一方ロータリーアトマイザーは高粘性液の微粒化
特性に優れている。ロータリーアトマイザーは円筒形ロ
ーターの回転径方向に複数の小径孔を設けた構造で、液
状物質は高速回転するローターの遠心力のみにより小径
孔から微細粒子に分割され水平方向に飛散する。噴霧乾
燥機の液状物質微粒化装置として使用する場合、ロータ
リーアトマイザーは円筒形噴霧乾燥チャンバー頂部の熱
風吹き出し口の中心軸線上に取り付けられるが、熱風が
チャンバー中心軸方向に吹き出されるのに対して、ロー
タリーアトマイザーから放出される噴霧粒子は熱風吹き
出し流と直交した水平方向の速度成分しか持たないた
め、熱風との熱交換率が低い欠点がある。また大径粒子
の場合は軸方向に吹き出す熱風の影響を受け難く、上部
チャンバー壁に未乾燥付着を生じ易い欠点がある。通
常、チャンバー径を大きくして有効乾燥領域を増やすた
めに、熱風吹き出し部に旋回翼板を取り付け熱風に旋回
成分を与える構造としているが、この旋回熱風により、
チャンバー壁全体に粉付着が生じたり、熱風吹き出し口
周辺の天井部に付着粉が生じ、これが焦粉化し製品に混
入するため、長時間運転が困難であるなどの欠点があ
る。
2. Description of the Related Art In the field of spray drying of liquid substances, pressure spray nozzles and rotary atomizers are widely used. In recent years, pressure spray nozzles, which are easy to handle in large capacity spray dryers and have a narrow spread range of spray droplets, have become the mainstream, while rotary atomizers are still widely used in small capacity machines. Pressure spray nozzles are easy to handle and have a good particle size distribution, but are not suitable for atomizing highly viscous liquids. On the other hand, a rotary atomizer is excellent in atomizing characteristics of a highly viscous liquid. The rotary atomizer has a structure in which a plurality of small-diameter holes are provided in a rotating direction of a cylindrical rotor. A liquid substance is divided into fine particles from the small-diameter holes only by the centrifugal force of a high-speed rotating rotor and scatters in a horizontal direction. When used as a liquid atomizer in a spray dryer, the rotary atomizer is mounted on the center axis of the hot air outlet at the top of the cylindrical spray drying chamber, whereas the hot air is blown in the direction of the center axis of the chamber. However, since the spray particles emitted from the rotary atomizer have only a horizontal velocity component orthogonal to the hot air blowing flow, there is a disadvantage that the heat exchange rate with the hot air is low. In the case of large-diameter particles, there is a drawback that the particles are hardly affected by the hot air blown in the axial direction and are likely to adhere to the upper chamber wall undried. Usually, in order to increase the diameter of the chamber and increase the effective drying area, a swirling vane plate is attached to the hot air blowing portion to give a swirling component to the hot air.
There is a drawback that powder adheres to the entire chamber wall or adheres to the ceiling around the hot-air outlet, which is burnt and mixed into the product, making it difficult to operate for a long time.

【0003】[0003]

【発明が解決しようとする課題】本発明は圧力噴霧ノズ
ルでは微粒化の困難な高粘性液状物質の微粒化に適し、
圧力噴霧ノズルに近い噴霧角度が得られ、しかも圧力噴
霧ノズルを使用している噴霧乾燥機の噴霧ノズル挿入管
に挿入可能な小径のロータリーアトマイザーを提供する
ことを目的とする。
The present invention is suitable for atomizing highly viscous liquid substances which are difficult to atomize with a pressure spray nozzle,
An object of the present invention is to provide a small-diameter rotary atomizer that can obtain a spray angle close to that of a pressure spray nozzle and that can be inserted into a spray nozzle insertion pipe of a spray dryer using a pressure spray nozzle.

【0004】[0004]

【課題を解決するための手段】本発明に関わるロータリ
ーアトマイザーは、垂直方向に回転軸を有する駆動用高
速回転体、駆動用高速回転体の下端部に接続され、中心
部を駆動用高速回転体の回転軸が貫通しており、下部に
下記回転体との連通口を有する固定された中空円筒状ケ
ーシング、該ケーシングの中空部に液を送入するための
液供給口、該ケーシングの中空部に加圧空気を送入する
ための空気供給口、及び中空円筒状ケーシングの下部に
接続され、且つ駆動用高速回転体の回転軸に取り付けら
れている上部が中空、下部が中実円柱体で該中実円柱体
内部を上面から下面に貫通している小径貫通孔を複数個
有する回転体(ローター)を構成要素とすることを特徴
とする。
SUMMARY OF THE INVENTION A rotary atomizer according to the present invention is connected to a lower end of a driving high-speed rotating body having a rotating shaft in a vertical direction, and a driving high-speed rotating body is connected to a central portion thereof. A fixed hollow cylindrical casing through which the rotating shaft of which penetrates and having a communication port with the following rotating body, a liquid supply port for feeding liquid into a hollow portion of the casing, a hollow portion of the casing The upper part which is connected to the air supply port for feeding pressurized air to the lower part of the hollow cylindrical casing and is attached to the rotating shaft of the driving high-speed rotating body is hollow, and the lower part is a solid cylinder. A rotating body (rotor) having a plurality of small-diameter through-holes penetrating the inside of the solid cylindrical body from the upper surface to the lower surface is a constituent element.

【0005】本発明のロータリーアトマイザーを添付図
面により説明すると、図1は駆動用高速回転体としてモ
ーターを使用した場合で、垂直方向に回転軸2を有する
駆動用高速回転体(モーター)1、駆動用高速回転体1
の下端部に接続され中心部を駆動用高速回転体の回転軸
2が貫通しており、下部に下記回転体(ローター)7と
の連通口4を有する固定された中空円筒状ケーシング
3、該ケーシングの中空部に液を送入するための液供給
口5、該ケーシングの中空部に加圧空気を送入するため
の空気供給口6、及び中空円筒状ケーシングの下部に接
続され、且つ駆動用高速回転体の回転軸2に取り付けら
れている上部が中空、下部が中実円柱体で該中実円柱体
内部を上面から下面に貫通している小径貫通孔を複数個
有する回転体(ローター)を構成要素とする。回転体
(ローター)下部の中実円柱体内部を上面から下面に貫
通している小径貫通孔は、中心軸からの距離が次第に大
きくなるように斜めに開けられている方が良い。符合9
は液溜り部分、符合10は駆動用高速回転体の回転軸2
と固定された中空円筒状ケーシング3との接続部の密封
機構、符合11は固定された中空円筒状ケーシング3と
回転体(ローター)7との接続部の密封機構である。密
封機構10、11としては、“0”リング、リップシー
ル及びストップリングなど、公知の手段を用いれば良
い。
A rotary atomizer of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a case where a motor is used as a high-speed rotating body for driving, and a high-speed rotating body (motor) 1 having a rotating shaft 2 in the vertical direction. High-speed rotating body 1
A fixed hollow cylindrical casing 3 which is connected to the lower end of the shaft and has a central portion through which the rotating shaft 2 of the driving high-speed rotating body penetrates, and which has a communication port 4 with a rotating body (rotor) 7 below. A liquid supply port 5 for supplying liquid to the hollow portion of the casing, an air supply port 6 for supplying pressurized air to the hollow portion of the casing, and a drive connected to the lower portion of the hollow cylindrical casing; Rotating body (rotor) having a plurality of small-diameter through-holes, the upper part of which is attached to the rotating shaft 2 of the high-speed rotating body for use, having a hollow upper part, a lower solid part and a solid cylindrical body penetrating from the upper surface to the lower surface. ) Is a component. It is preferable that the small-diameter through-hole penetrating from the upper surface to the lower surface through the inside of the solid cylinder below the rotating body (rotor) is obliquely opened so that the distance from the central axis becomes gradually larger. Code 9
Is a liquid pool portion, and reference numeral 10 is a rotating shaft 2 of a high-speed rotating body for driving.
Reference numeral 11 denotes a sealing mechanism for a connection portion between the fixed hollow cylindrical casing 3 and the fixed hollow cylindrical casing 3. Reference numeral 11 denotes a sealing mechanism for a connection portion between the fixed hollow cylindrical casing 3 and the rotating body (rotor) 7. Known means such as a “0” ring, a lip seal, and a stop ring may be used as the sealing mechanisms 10 and 11.

【0006】図1に基づき本発明のロータリーアトマイ
ザーの作用機構を説明する。駆動用高速回転体1を高速
回転させると、その回転軸2に直結した回転体(ロータ
ー)7も高速回転する。中空円筒状ケーシング3に液供
給口5から供給された液体及び空気供給口6から供給さ
れた空気は、連通口4を通って回転体(ローター)7に
入り、ローターの下部に設けられた小径貫通孔8から噴
出する。空気を同伴しない場合は従来のロータリーアト
マイザーと同様で、噴出した液滴は、ローターの高速回
転による強力な遠心力の作用によりほぼ水平方向に飛散
するが、空気を同伴している場合は、液状物質は小径貫
通孔8を通過中高速となり、垂直軸方向の速度成分が与
えられる。ローターの回転速度と同伴空気量(圧力制
御)を調節することにより、任意の噴霧角を有するスプ
レーパターンを得ることができる。駆動用高速回転体と
してモーターを使用するこの態様は特に処理液量が大容
量の場合に適している。
The operation mechanism of the rotary atomizer of the present invention will be described with reference to FIG. When the driving high-speed rotating body 1 is rotated at high speed, the rotating body (rotor) 7 directly connected to the rotating shaft 2 also rotates at high speed. The liquid supplied from the liquid supply port 5 and the air supplied from the air supply port 6 to the hollow cylindrical casing 3 enter the rotating body (rotor) 7 through the communication port 4 and have a small diameter provided at the lower part of the rotor. It gushes from the through hole 8. When air is not entrained, it is the same as a conventional rotary atomizer, and the ejected droplets are scattered almost horizontally by the action of strong centrifugal force due to the high-speed rotation of the rotor. The substance becomes high speed while passing through the small-diameter through hole 8, and a velocity component in the vertical axis direction is given. By adjusting the rotation speed of the rotor and the amount of entrained air (pressure control), a spray pattern having an arbitrary spray angle can be obtained. This embodiment in which a motor is used as the high-speed rotating body for driving is particularly suitable when the processing liquid volume is large.

【0007】図2は駆動用高速回転体1として加圧空気
駆動式回転体を用いる場合の実施態様で、駆動用空気供
給管12から供給された加圧空気は、回転体を回転駆動
させる動力源として利用された後、加圧空気駆動式回転
体下端部13から排気され、中空円筒状ケーシング3に
供給される。この場合は中空円筒状ケーシング3への空
気供給口(図1の符合6)を別個に設ける必要はない。
作用機構は図1の場合と同様であるが、加圧空気駆動式
回転体の動力効率が低いこと、及び回転体(ローター)
の回転制御と切り放して加圧空気供給圧を制御すること
ができず噴霧角の調節範囲が限定されると言う欠点があ
る。従って、この実施態様は処理液量が比較的少ない場
合に適している。
FIG. 2 shows an embodiment in which a pressurized air-driven rotator is used as the driving high-speed rotator 1. Pressurized air supplied from a driving air supply pipe 12 is used to drive the rotator to rotate. After being used as a source, the air is exhausted from the lower end 13 of the pressurized air driven rotary body and supplied to the hollow cylindrical casing 3. In this case, there is no need to separately provide an air supply port (6 in FIG. 1) to the hollow cylindrical casing 3.
The action mechanism is the same as that of FIG. 1, but the power efficiency of the pressurized air driven rotary body is low, and the rotary body (rotor)
However, it is impossible to control the pressurized air supply pressure by cutting off the rotation control and to limit the spray angle adjustment range. Therefore, this embodiment is suitable when the amount of the processing liquid is relatively small.

【0008】回転体(ローター)中実部を貫通する小径
貫通孔の長さ、数、傾斜角度等の最適値は液状物質の粘
性により異なる。一般的に、低粘性液状物質は小径貫通
孔の通過抵抗が少ないため、小径貫通孔の長さを長く
(螺旋小径貫通孔により加速微粒化効果を高める)し、
小径貫通孔の断面積を小さく(小径貫通孔数×断面積)
することが好ましく、高粘性液状物質の場合は逆の構成
にするのが好ましい。
The optimum values of the length, number, inclination angle, etc. of the small-diameter through holes penetrating the solid portion of the rotor (rotor) differ depending on the viscosity of the liquid material. In general, a low-viscosity liquid substance has a small passage resistance through a small-diameter through-hole, so that the length of the small-diameter through-hole is increased (the spiral small-diameter through-hole increases the effect of accelerated atomization)
Small cross-sectional area of small-diameter through hole (number of small-diameter through holes x cross-sectional area)
In the case of a highly viscous liquid substance, it is preferable to adopt the opposite configuration.

【0009】[0009]

【発明の実施の形態】本発明のロータリーアトマイザー
は、ローターの回転による円周方向速度成分と、加圧空
気加速による垂直軸方向速度成分を液状物質に与えるこ
とにより、任意の噴霧角を持つ傘状噴霧パターンを得る
ことができる。噴霧角度の調整は小径貫通孔の傾斜角度
を調整することによっても可能である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary atomizer according to the present invention provides an umbrella having an arbitrary spray angle by providing a liquid material with a circumferential velocity component due to rotation of a rotor and a vertical axial velocity component due to pressurized air acceleration. A spray pattern can be obtained. The spray angle can also be adjusted by adjusting the inclination angle of the small-diameter through-hole.

【0010】例えば小容量ロータリーアトマイザーの場
合、φ40mm径のローターを12000rpmで回転
させると周速度は僅か25m/sに過ぎない。加圧空気
を供給しない場合、液滴に与えられる速度成分は周速度
のみであるため、水などの低粘性液状物質でも噴霧乾燥
可能なほどに微粒化することは到底不可能である。しか
し中空ケーシングに2kg/cm2 の加圧空気を供給す
ると、小径貫通孔で25%の圧力損失を生じた場合でも
孔から噴出する空気速度は500m/s程度になる。液
状物質の粘性と液/空気比により液状物質が小径貫通孔
を通過する間に与えられる速度は変化するが、仮に空気
速度の0.3倍に加速されたとすると150m/s前後
の吹き出し速度が得られる。この結果、粒子に与えられ
る合成速度は152m/sとなり、従来型ロータリーア
トマイザーでローター径φ240mm/12000rp
mのものとほぼ同じ程度に微粒化することができる。上
記小容量ロータリーアトマイザーの場合、周速度が小さ
いため軸方向の貫通孔では噴霧角度は僅か19度に過ぎ
ないが、小径貫通孔の傾斜角度を調整することにより所
要の噴霧角に調整できる。駆動用高速回転体径もφ40
mm以下に納まるため、φ60mm程度のノズル挿入管
に容易に取りつけることが可能である。
For example, in the case of a small-capacity rotary atomizer, when a rotor having a diameter of φ40 mm is rotated at 12000 rpm, the peripheral speed is only 25 m / s. When the pressurized air is not supplied, the velocity component given to the droplet is only the peripheral velocity, so that even a low-viscosity liquid substance such as water cannot be atomized enough to be spray-dried. However, when 2 kg / cm 2 of pressurized air is supplied to the hollow casing, even when a 25% pressure loss occurs in the small-diameter through-hole, the air velocity ejected from the hole becomes about 500 m / s. Depending on the viscosity of the liquid material and the liquid / air ratio, the speed given while the liquid material passes through the small-diameter through hole changes, but if the air speed is accelerated to 0.3 times the air speed, the blowing speed of about 150 m / s is reduced. can get. As a result, the synthesis speed given to the particles was 152 m / s, and the rotor diameter was 240 mm / 12000 rpm with a conventional rotary atomizer.
m can be atomized to about the same degree. In the case of the small-capacity rotary atomizer, since the peripheral velocity is small, the spray angle in the axial through hole is only 19 degrees, but the required spray angle can be adjusted by adjusting the inclination angle of the small diameter through hole. Diameter of high-speed rotating body for driving is φ40
mm or less, it can be easily attached to a nozzle insertion tube of about φ60 mm.

【0011】またφ100mm径のローターを1200
0rpmで回転させた場合、周速度は62.8m/s
で、中空ケーシングに3kg/cm2 の加圧空気を供給
し、液状物質の加速が空気噴出速度の0.2倍とする
と、液状物質の噴出速度は140m/s程度となる。こ
の場合の液滴の合成速度は153.4m/sとなり、合
成噴霧角度は48度である。小径貫通孔の傾斜角度を調
整することにより噴霧角度を更に大きくすることも可能
である。
[0011] A rotor having a diameter of
When rotated at 0 rpm, the peripheral speed is 62.8 m / s
Then, if pressurized air of 3 kg / cm 2 is supplied to the hollow casing and the acceleration of the liquid material is 0.2 times the air ejection speed, the ejection speed of the liquid material is about 140 m / s. In this case, the combined speed of the droplets is 153.4 m / s, and the combined spray angle is 48 degrees. The spray angle can be further increased by adjusting the inclination angle of the small-diameter through hole.

【0012】従来型ロータリーアトマイザーは高速回転
で且つ雰囲気温度も高いため、耐久性が問題となってい
る。また大容量機になると駆動用モーターと加速機の重
量も数百kgとなり、メンテナンスも非常に困難であ
る。本発明のロータリーアトマイザーでは3000L/
hr程度の大容量の場合でも、ローター径をφ100m
m以下に抑えることが可能である。大容量機の場合はむ
しろその駆動用モーター径が制約条件となる。既存の高
速回転モーターではφ100mm以下では3.7kw程
度の出力が限度である。一方、同容量の従来型ロータリ
ーアトマイザーの駆動用モーターは37kw程度が必要
である。従って、大容量になる程、駆動用モーターによ
る旋回加速に比べて、加圧空気供給用コンプレッサーの
動力が支配的になる。エネルギー効率面からすれば、従
来型ロータリーアトマイザーの方が分があるものの、操
作性、メンテナンス性では遥かに勝っており、圧力噴霧
ノズルと互換可能である利点を生かして、圧力噴霧ノズ
ルでは微粒化の困難な高粘性液状物質の場合にのみ使用
すれば、エネルギー効率がやや劣ることもそれ程障害に
はならない。
Since the conventional rotary atomizer rotates at high speed and has a high ambient temperature, durability is a problem. In the case of a large-capacity machine, the weight of the driving motor and the accelerator becomes several hundred kg, and maintenance is very difficult. In the rotary atomizer of the present invention, 3000 L /
Even with a large capacity of about hr, the rotor diameter is φ100m
m or less. In the case of a large-capacity machine, the driving motor diameter is rather a limiting condition. With an existing high-speed rotating motor, the output of about 3.7 kW is the limit for φ100 mm or less. On the other hand, the drive motor of the conventional rotary atomizer having the same capacity requires about 37 kW. Therefore, as the capacity increases, the power of the compressed air supply compressor becomes dominant as compared with the turning acceleration by the driving motor. From the viewpoint of energy efficiency, the conventional rotary atomizer has some advantages, but it is far superior in operability and maintainability, and it is compatible with pressure spray nozzles. If it is used only in the case of a highly viscous liquid material which is difficult to perform, a slight inefficiency in energy efficiency does not hinder much.

【0013】同じ供給空気圧力でも、液状物質の粘性の
違いにより液滴の垂直軸方向速度成分が変化する。粘性
が高くなる程、小径貫通孔の壁面抵抗により加速され難
い。また粘性が極端に低い液状物質の場合、小径貫通孔
の長さが短過ぎると、円周方向速度成分が十分与えられ
ないまま噴射される傾向がある。この場合には、図2に
示すように回転体下部の中実円柱体を中実裁頭円錐体7
Aとその他の部分7Bとに分割し、中実裁頭円錐体7A
の外面に複数の螺旋溝を設けて前記その他の部確7Bと
の間に螺旋状の小径貫通孔を形成する。これにより小径
貫通孔の長さを確保すると同時に噴射液滴の水平方向速
度成分を増加させることが可能である。この手法を用い
ることにより、回転体(ローター)径が小さく回転数が
低い場合でも広い噴霧角が得られる。このことから、本
発明のロータリーアトマイザーは2流体噴霧ノズルの特
性と従来型ロータリーアトマイザーの特性を兼ね備えて
おり、大径のローターを高速回転させ空気圧力を低くす
れば、従来型ロータリーアトマイザーに近い特性が得ら
れる。また、小径のローターを低速回転させ空気圧力を
高くすれば、2流体噴霧ノズルに近い特性が得られる。
この場合でも、断面積の小さい複数の小径貫通孔が使
え、ローターが回転するため、従来型2流体噴霧ノズル
と比較すると、低い空気圧力でも大径粒子が発生し難
く、噴霧角が小さいながらも均一な傘状噴霧パターンが
得られ、しかも、シャープな粒子径分布が得られる点で
従来型2流体噴霧ノズルと比較すると、噴霧乾燥機用微
粒化装置として格段に有利である。なお、直線状の斜め
小径貫通孔を形成する手段として、回転体下部の中実円
柱体を中実裁頭円錐体7Aとその他の部分7Bとに分割
し、中実裁頭円錐体7Aの外面に複数の直線溝を設けて
前記その他の部分7Bとの間に直線状の小径貫通孔を形
成させることも自由である。
Even at the same supply air pressure, the velocity component in the vertical axis direction of the droplet changes due to the difference in viscosity of the liquid material. The higher the viscosity, the more difficult it is to accelerate due to the wall resistance of the small diameter through-hole. In addition, in the case of a liquid material having extremely low viscosity, if the length of the small-diameter through hole is too short, there is a tendency that the liquid material is jetted without sufficiently providing the circumferential velocity component. In this case, as shown in FIG.
A and the other part 7B, and the solid frustum cone 7A
A plurality of spiral grooves are provided on the outer surface of the screw member to form a spiral small-diameter through hole with the other part 7B. This makes it possible to secure the length of the small-diameter through-hole and increase the horizontal velocity component of the ejected droplet at the same time. By using this method, a wide spray angle can be obtained even when the rotating body (rotor) diameter is small and the number of rotations is low. From this, the rotary atomizer of the present invention has both the characteristics of the two-fluid spray nozzle and the characteristics of the conventional rotary atomizer. If the large-diameter rotor is rotated at high speed and the air pressure is reduced, the characteristics similar to those of the conventional rotary atomizer are obtained. Is obtained. If the small-diameter rotor is rotated at a low speed to increase the air pressure, characteristics close to those of a two-fluid spray nozzle can be obtained.
Even in this case, a plurality of small-diameter through-holes having a small cross-sectional area can be used, and the rotor rotates. Therefore, compared with the conventional two-fluid spray nozzle, large-diameter particles are less likely to be generated even at a low air pressure, and the spray angle is small. Compared with a conventional two-fluid spray nozzle, a uniform umbrella-shaped spray pattern can be obtained and a sharp particle size distribution can be obtained, which is extremely advantageous as an atomizer for a spray dryer. As a means for forming a straight oblique small-diameter through-hole, a solid cylinder at the lower part of the rotating body is divided into a solid frustum cone 7A and another portion 7B, and the outer surface of the solid frustum cone 7A is formed. It is also possible to provide a plurality of straight grooves in the hole and to form a straight small-diameter through hole between the other portion 7B.

【0014】[0014]

【発明の効果】圧力噴霧ノズルでは微粒化の困難な高粘
性液状物質の微粒化に適し、噴霧角調整が可能で、圧力
噴霧ノズルに近い噴霧角度を得られる。
The pressure spray nozzle is suitable for atomizing a highly viscous liquid material which is difficult to atomize, and the spray angle can be adjusted, and a spray angle close to that of the pressure spray nozzle can be obtained.

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

【図1】本発明の実施態様の一例を示す図である。FIG. 1 is a diagram showing an example of an embodiment of the present invention.

【図2】本発明の実施態様の他の例を示す図である。FIG. 2 is a diagram showing another example of the embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 駆動用高速回転体 2 回転軸 3 中空円筒状ケーシング 4 連通口 5 液供給口 6 空気供給口 7 回転体(ローター) 8 小径貫通孔 9 液溜り 10 密封機構 11 密封機構 12 駆動用空気供給管 13 加圧空気駆動式回転体下端 DESCRIPTION OF SYMBOLS 1 High-speed rotating body for driving 2 Rotating shaft 3 Hollow cylindrical casing 4 Communication port 5 Liquid supply port 6 Air supply port 7 Rotating body (rotor) 8 Small diameter through hole 9 Liquid pool 10 Sealing mechanism 11 Sealing mechanism 12 Driving air supply pipe 13. Compressed air driven rotary body lower end

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 垂直方向に回転軸を有する駆動用高速回
転体、駆動用高速回転体の下端部に接続され、中心部を
駆動用高速回転体の回転軸が貫通しており、下部に下記
回転体との連通口を有する固定された中空円筒状ケーシ
ング、該ケーシングの中空部に液を送入するための液供
給口、該ケーシングの中空部に加圧空気を送入するため
の空気供給口、及び中空円筒状ケーシングの下部に接続
され、且つ駆動用高速回転体の回転軸に取り付けられて
いる上部が中空、下部が中実円柱体で該中実円柱体内部
を上面から下面に貫通している小径貫通孔を複数個有す
る回転体(ローター)を構成要素とすることを特徴とす
るロータリーアトマイザー。
1. A high-speed driving rotary body having a rotating shaft in a vertical direction, connected to a lower end of the driving high-speed rotating body, and a rotating shaft of the driving high-speed rotating body penetrates a central portion. A fixed hollow cylindrical casing having a communication port with a rotating body, a liquid supply port for supplying liquid to a hollow portion of the casing, and an air supply for supplying pressurized air to a hollow portion of the casing. The upper part which is connected to the mouth and the lower part of the hollow cylindrical casing and is attached to the rotating shaft of the high-speed rotating body for driving is hollow, the lower part is a solid cylinder, and the inside of the solid cylinder penetrates from the upper surface to the lower surface. A rotary atomizer comprising a rotating body (rotor) having a plurality of small-diameter through-holes.
【請求項2】 回転体(ローター)下部の中実円柱体内
部を上面から下面に貫通している小径貫通孔が、中心軸
からの距離が次第に大きくなるように斜めに開けられて
いる請求項1に記載のロータリーアトマイザー。
2. A small-diameter through-hole penetrating from the upper surface to the lower surface in the solid cylindrical body below the rotating body (rotor) is formed obliquely so that the distance from the central axis becomes gradually larger. 2. The rotary atomizer according to 1.
【請求項3】 駆動用高速回転体が加圧空気を動力源と
するもので、その排気を駆動用高速回転体下端部より排
気し、この排気を中空円筒状ケーシングに供給する構造
である請求項1又は請求項2に記載のロータリーアトマ
イザー。
3. A structure in which the driving high-speed rotating body uses pressurized air as a power source, exhausts the exhaust from a lower end of the driving high-speed rotating body, and supplies the exhaust to the hollow cylindrical casing. The rotary atomizer according to claim 1 or 2.
【請求項4】 回転体下部の中実円柱体が中実裁頭円錐
体とその他の部分とに分割されており、中実裁頭円錐体
外面に複数の直線溝又は螺旋溝が設けられて前記その他
の部分との間に斜めの小径貫通孔を形成している請求項
2又は請求項3に記載のロータリーアトマイザー。
4. A solid cylindrical body below the rotating body is divided into a solid frustoconical body and other parts, and a plurality of linear grooves or spiral grooves are provided on the outer surface of the solid frustoconical body. The rotary atomizer according to claim 2 or 3, wherein an oblique small-diameter through hole is formed between the other portion and the other portion.
JP18792397A 1997-07-14 1997-07-14 Rotary atomizer Pending JPH1128390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18792397A JPH1128390A (en) 1997-07-14 1997-07-14 Rotary atomizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18792397A JPH1128390A (en) 1997-07-14 1997-07-14 Rotary atomizer

Publications (1)

Publication Number Publication Date
JPH1128390A true JPH1128390A (en) 1999-02-02

Family

ID=16214579

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18792397A Pending JPH1128390A (en) 1997-07-14 1997-07-14 Rotary atomizer

Country Status (1)

Country Link
JP (1) JPH1128390A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2382236A (en) * 1999-01-28 2003-05-21 Bel Fuse Inc RJ jack with integerated interface magnetics
WO2014017511A1 (en) * 2012-07-27 2014-01-30 株式会社パウダリングジャパン Liquid-atomizing device and liquid-atomizing method
KR101509050B1 (en) * 2014-07-21 2015-04-08 김정원 A bulk rotary atomizer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2382236A (en) * 1999-01-28 2003-05-21 Bel Fuse Inc RJ jack with integerated interface magnetics
GB2382236B (en) * 1999-01-28 2003-07-16 Bel Fuse Inc RJ jack with integrated interface magnetics
WO2014017511A1 (en) * 2012-07-27 2014-01-30 株式会社パウダリングジャパン Liquid-atomizing device and liquid-atomizing method
JPWO2014017511A1 (en) * 2012-07-27 2016-07-11 株式会社パウダリングジャパン Fluid atomization apparatus and fluid atomization method
KR101509050B1 (en) * 2014-07-21 2015-04-08 김정원 A bulk rotary atomizer

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