JPS5982957A - Rotary sprayer - Google Patents

Abstract

PURPOSE:To obtain uniformly and finely atomized particles in a rotary sprayer for a spray dryer or the like by ejecting a liquid for atomization from an ejection nozzle toward a liquid contact surface in the pattern spreading sectorially like a thin film. CONSTITUTION:An atomizing head body 1 is rotated at a high speed by a revolving shaft 3 driven by a motor 2 to eject a liquid for atomization from the ejection port 6A of an ejection nozzle 6 toward a liquid contact surface 4 in such an ejection pattern A of an eyebrow, elliptical or circular shape spreading sectorially like a thin film. The liquid for atomization supplied so as to contact in the form of a thin film tightly with the surface 4 in the above-mentioned way is spread along the surface 4 by the effect of a centrifugal force and is sprayed as the slender liquid yarn extending outward from a hollow groove 1B formed in the edge part 1A of the body 1. The liquid yarn is sheared and the fine particles are satisfactorily obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is used in spray drying equipment, spray granulation equipment, flash drying equipment, electrostatic coating equipment, etc. The present invention relates to a rotary spray device that sprays an atomization liquid from an atomization head main body.

Generally, a rotary atomizing head has an atomizing head body such as a rotating disk, and the atomizing liquid is supplied while the atomizing head body is rotated at high speed to atomize the atomizing liquid. Spray equipment is widely used in fields such as spray drying equipment, spray granulation equipment, and electrostatic coating equipment.

By the way, when atomizing liquid is atomized using this type of rotary atomizer, in order to obtain fine particles with a narrow particle size distribution and good quality, it is necessary to The supplied atomizing liquid must be uniformly supplied all around the edge of the atomizing head body. However, in the prior art described above, the atomizing liquid is supplied to the atomizing head main body by dripping or flowing down the liquid column from the liquid supply pipe toward the surface in contact with the liquid. Since liquid dripped or sweated on a high-speed rotating surface flows in a straight line in the radial direction without forming a thin film, it is atomized into fine particles with extremely high uniformity. was not yet complete. For this purpose, for example, a hub member with a dam effect with many pores radially bored in the middle of the liquid contact surface is installed, and the liquid is divided into pure liquid streams by passing through these pores. There are known products that promote atomization. However, even with this method, due to the physical properties of the atomizing liquid, it is still insufficient to achieve good atomization, and the disadvantage is that the average particle size of the atomized particles is large, and the variation in particle size distribution is also large. was there.

This invention has been developed in view of the points e and f of the present invention, and it is possible to uniformly supply the atomizing liquid on the liquid contact surface over the entire circumference of the edge of the atomizing head body, thereby creating a uniform and fine mist. It is an object of the present invention to provide a rotary atomizing device f capable of obtaining fine particles.

In order to achieve the above-mentioned object, the rotary atomizing device according to the present invention includes an atomizing head main body forming a liquid contact surface to which atomizing liquid is supplied, and a rotating shaft that rotates the atomizing head main body at high speed. The present invention is characterized in that it is configured to include an ejection nozzle that can eject the atomizing liquid in a thin fan-like pattern toward the liquid contact surface.

By adopting such a configuration, the atomizing liquid is sprayed in a planar pattern toward the surface in contact with the liquid, so the atomizing liquid can be formed into a uniform, extremely thin liquid film, and It can be uniformly diffused over the entire circumference of the chemical head, and it is possible to obtain fine particles that are extremely fine and have a narrow particle size distribution.

Embodiments of the present invention will be described below based on the drawings.

First, FIG. 1 and FIG. is the rotating shaft 3 of motor 2
The rotary shaft 3 is fixed to the rotary shaft 3 and is configured to rotate at high speed following the rotary shaft 3. In addition, the atomization head body 1
A surface 4 in contact with the liquid is formed on the upper surface, and the surface 4 in contact with the liquid is formed on the upper surface, and the surface 4 in contact with the liquid is formed on the upper surface, and the surface 4 in contact with the liquid is formed on the periphery of the surface 4.
A large number of grooves IB, IB, .

Next, reference numeral 5 indicates a liquid supply pin for supplying liquid for atomization, and 6 indicates a renaissance jet nozzle attached to the tip of the liquid supply vibrator 5. It is connected to a pump (not shown), and the pump can apply pressure to the atomizing liquid supplied from several tanks (not shown) and supply it to the liquid supply pipe 5. . Then, the liquid pressure of the atomizing liquid that is pumped from the pump causes the first discharge nozzle 6 to be moved to the first output nozzle 6.
A can be ejected from A to the wetted surface 4, and one stroke Ai is opened at a position close to the wetted surface 4 in the vicinity of the rotation center of the wetted surface 4. ing.

In addition, the first outlet 6A has a circular protrusion 6B surrounding the outlet 6A so that the liquid can be sprayed at a predetermined speed toward the wetted surface 4 with an elliptical pattern that expands into a thin film fan shape.
Layered grooves 6C are formed by cutting with the grooves (
Eight. Moreover, if the lip-shaped groove part 6C is replaced with a conical groove part or the like by cutting into an appropriate shape, it is possible to obtain a circular, layered, etc. spouted butter.In short, the spouting pattern from the spouting nozzle 6 is expanded into a fan shape. It suffices if it can be brought into contact with or in close contact with the liquid-contacting surface 4 in a planar shape.

The rotary spray device according to this embodiment has the above-mentioned configuration, and its operation will be explained next.

First, the motor 2 is driven to rotate the rotary shaft 3 at high speed together with the atomizing head main body 1 which is integrated with the atomizer. Then, the pump is driven to supply the atomizing liquid to the jet nozzle 6 at a predetermined hydraulic pressure. The atomizing liquid thus supplied is ejected from the ejection port 6A of the ejection nozzle 6 toward the liquid contact surface 4 of the atomizing head main body 1. Moreover, the jetting pattern from the jetting nozzle 6 is spread out in a thin film fan shape. ! : Since the temperature is high, at the time of contact with the liquid contact surface 4, it is as shown in Fig. 3 (a).
l (b) t As shown in (C), layered shape A, elliptical shape B
It has a wide planar shape, such as a two-circle C, and is already in a state where thinning has progressed. The atomizing liquid thus supplied so as to adhere to the liquid contact surface 4 in a thin film form spreads along the liquid contact surface 4 due to the action of centrifugal force.
A thin liquid system extending outward from the concave groove IB formed in the edge part IA of the atomizing head main body 1 is sprayed, and this liquid system is sheared to obtain good and fine particles.

Next, FIGS. 4 and 5 show a second embodiment of the present invention, and the same components as those in the first embodiment described above are denoted by the same reference numerals, and their explanation will be omitted. Reference numeral 11 denotes a knob member fixed to the rotating shaft 3, and the upper surface of the hub member 11 is connected to the first
A jet nozzle 6 is connected to the He liquid contact surface 12.
In order for the glazing solution to be supplied from the l'j'j lJ-16A installed at the tip of the 7J in 5 figures: Zuzu 11
<, e.g. 4 support pins], Knee 3+ 1-3 t
...The bell-shaped atomizing head main body 14 is concentrically installed in a solid nozzle, and the knob member 11 and the atomizing head main body 1 are jointly installed.
There are four slots between each support bin 13 and 4.

1・15H] 5H... defined and obtained]・)η
Between the inner peripheries of the 1/l convertible head body, from each slit 1 to 15 to the edge portion 14A (a) becomes the second fl m surface 16, and ii) 10' is the same as in the embodiment. edge part 14
．． A has many depressions 14 B , 14 B ,...
is engraved on it.

The present '-μ embodiment is constructed as described above, but similarly to the first '-bar embodiment mentioned above, the rotating shaft 3 is connected to the hub part (A11 and the support pin 13) integrated therewith. Applicable part +
'4'i] together with the atomizing head main body 14, which is set to Th'f, at a sieving speed. In addition, the liquid contact surface 1 of the knob member 11
2. Turn the spout 6A of the spout nozzle 6 to make the atomizing liquid sound like a thin film fan (11). In this way, the sliding surface 1
The atomizing liquid supplied so as to be in close contact with the atomizing head body 14 in the form of a thin film is diffused from the liquid contact surface 12 to each slit 15, and furthermore, due to the action of centrifugal force, the atomizing liquid is brought into contact with the atomizing head main body 14 (XrL surface 16 The atomizing liquid that has reached this point is applied to the liquid contact surface 16 and covered with it,
Concave groove 14 formed in edge portion 1.4A of atomizing head main body 14
A liquid system is sprayed from J3, and this liquid system is sheared to obtain all the particles.

Therefore, if 314 pieces are formed as in this embodiment, the hub member 11
It is connected to the head body 14 via a support bottle 13,
Therefore, the first and second liquid contact surfaces 12.1
6 can be made substantially continuous through the slit 15, and the liquid for 4ing can be supplied to the entire circumference of the edge portion 14A.

In each of the above embodiments, the atomizing liquid is mechanically atomized, but if a high voltage is applied to the atomizing liquid, in addition to the mechanical atomizing effect described above, it is possible to Atomization 1
``The atomization of the atomizing liquid is further promoted.
Although a large number of grooves IB or 14B are formed in A or 14A, it is not necessary to provide these grooves 11'3 and 14B. In the example, the ejection nozzle 6 was installed 71;;Body I31: rY
G-, the vibrator 5 is attached to the casing of the motor 2, and the vibrator 5 is rotated; i I set it to Ij7, but the motor 2 is the atomizing head"\I, 1, 1, 1 Hijikata, :l ← 10, same rotation *i
1+3 may be provided in a position opposite to the liquid supply vibrator 5. In addition, when using a face piece for one box and (-2 high viscosity or a solid V7 iron at this temperature, dl, heating melt 1i'!! Sheet shape I?r; (c sheet supplying the atomizing liquid to the l-output nozzle 6;
2 + 1.611) + γ) If you do it, it's ok.

As described in detail below in 6), according to the rotary atomizing device of the present invention, a jetting nozzle for jetting the atomizing liquid is provided on the liquid contact surface of the atomizing head main body. 11. The jetting pattern from the jetting nozzle was set to widen in a fan shape toward the liquid surface of the core 4-4. The atomizing liquid ejected from the IT nozzle has a planar shape on the liquid surface. It becomes a film and rusts! ↓ -1 can be uniformly supplied to all stations in the main body. Since the atomizing liquid supplied in this way can be atomized very well at the edge of the atomizing head body, it is fine and has a particle size distribution width of ζ of 14 (l + Particles ζ) can benefit from various effects.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, the first drawing is a longitudinal cross-sectional view of a rotary spraying device L2 using a disc-type atomizing head main body, and the second drawing is a longitudinal sectional view of a rotary spraying device L2 using a disk-type atomizing head body, and FIG. 2 is a drawing of a jet nozzle. Front view, Figure 3 (a) + (b) l (C) &, J-1
1, 4 and 5 show a second embodiment of the present invention, in which the vertical one of the rotary atomizing device using the bell-shaped atomizing head main body is shown in FIG. Surface [, gl,
FIG. 5 is a plan view of the main body of the atomizing head. 1.14-...! 3-head main body, 2... motor, 3...
・Rotation axis, 4, 12, 1.6...Liquid contact πl'', 5
...Liquid supply vibrator, 6...Ejection nozzle.

Claims (1)

[Claims] An atomizing head main body forming a wetted surface to which an atomizing liquid is supplied, a rotating shaft for rotating the atomizing head main body, and a rotating shaft that spreads the atomizing liquid in a thin film fan shape toward the liquid contacting surface. A rotary spray device equipped with a spray nozzle that can spray in a pattern.