JPH0641604Y2 - Spraying machine for spray dryer - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a spraying machine for atomizing a stock solution into a mist in a spray dryer (spray dryer). The present invention relates to a spraying machine that atomizes the stock solution into a mist.

<Prior Art> As this type of sprayer, the one disclosed in Japanese Utility Model Publication No. 48-21103 is well known and used. However, when the undiluted solution is sprayed with this conventional spraying disk, the undiluted solution supplied from the undiluted solution supply pipe jumps on the upper surface of the unloaded disk that is rotating at a high speed because the upper surface of the mounting disk is formed horizontally. Therefore, there was a problem that the liquid surface of the stock solution formed on the upper surface of the mounting disk was wavy, and as a result, the particle size was likely to be uneven. Moreover, since the upper disk was also formed as a horizontal flat plate, the hot air blown from above the spray disk hits the upper surface of the upper disk, which is rotating at high speed, and the turbulent flow of hot air is easily generated, resulting in atomization. There was a problem in that the stock solution or the dried and powdered product tended to fly upward.

<Problems to be solved by the invention> The present invention has been made in view of such a conventional problem, and it is possible to perform high-quality granulation with uniform particle size, and to atomize the stock solution or dry the solution. It is an object of the present invention to provide a spraying machine for a spray dryer that can prevent powdered products from flying upward in the spray dryer.

<Means for Solving the Problems> A spraying machine for a spray dryer according to the present invention which achieves such an object is equipped with a rotary shaft at the center of the upper surface on the lower surface of an upper disk having an opening for forming an undiluted solution in the center thereof. In a spray disk for a spray dryer in which a mounting disk having a protruding portion is integrally configured through an appropriate number of columns, the upper surface of the mounting disk is formed in a downwardly sloping shape from the center toward the outer peripheral edge, and It is characterized in that the peripheral portion of the upper disc is formed in a downwardly sloping shape.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

The spray disc A of the present invention comprises one upper disc 1 and mounting disc 2,
And a plurality of columns 3 for integrating the upper disc 1 and the mounting disc 2 with each other.

The upper disc 1 is formed into a flat circular donut-shaped flat plate with a large undiluted solution supply window hole 4 formed in the center by press working using a stainless steel plate or the like, and the peripheral edge 1a is directed downward over the entire circumference. The upper disk 1 is integrally formed with the mounting disk 2 on the lower surface of the upper disk 1 through an appropriate number of columns 3.

The mounting disk 2 is for atomizing the stock solution a, is formed in a circular shape having substantially the same diameter as the upper disk 1, and is mounted with a rotary shaft for connecting the rotary shaft C of the spray dryer B to the center of the upper surface thereof. The part 5 is provided so as to project upward, and the upper surface 2a
Is formed in a gentle slope downward from the center to the outer peripheral edge over the entire circumference.

The support columns 3 are for connecting the upper disc 1 and the mounting disc 2 at appropriate intervals to each other, and are caulked across the inner edge of the undiluted solution supply window hole 4 of the upper disc 1 and the peripheral edge of the mounting disc 2. Attach or fix with a nut.

At this time, as in the illustrated embodiment, the inclination angle α of the peripheral edge portion 1a of the upper disc 1 and the inclination angle β of the upper surface 2a of the mounting disc 2 are aligned.
In other words, the peripheral edge 1a of the upper disk 1 and the upper surface 2a of the mounting disk 2
By forming and in parallel with each other and assembling the columns 3 between them in an orthogonal manner, it is possible to easily integrate the upper disk and the mounting disk 2 by using the same columns 3 as the conventional one. become. In the case of the illustrated embodiment, the upper disk 1 and the mounting disk 2 are integrally fixed by caulking both ends of the supporting pillar 3 so that they cannot be separated from each other, but the upper disk 1, the mounting disk 2 and the supporting pillar 3 are fixed with nuts. By disassembling and separating from each other, disassembly cleaning can be performed, and even a small sprayer A can be easily and cleanly cleaned.

Then, in use, as shown in FIG. 3, the spray disk A is fixed to the lower end of the rotary shaft C of the spray dryer B through the rotary shaft mounting portion 5 of the mounting disk 2 and is made the same body as the rotary shaft C. At the same time, the stock solution is rotated at a high speed in the horizontal direction, and the stock solution supply pipe D is exposed in the stock solution supply window hole 4 of the upper disk 1 to supply the stock solution onto the upper surface 2a of the mounting disk 2. Then, the stock solution is atomized by the action of the centrifugal force of the mounting disc that is rotating at a high speed when leaving the mounting disc 2, and comes into contact with hot air to be instantly dried and powdered.

<Effects of the Invention> Since the spray disk for the spray dryer of the present invention is formed such that the upper surface of the mounting disk is inclined downward from the center toward the outer peripheral edge, the stock solution supplied from the stock solution supply pipe is mounted. It smoothly flows to the outer peripheral edge of the mounting disk without bouncing on the upper surface of the disk,
Therefore, the liquid surface of the stock solution formed on the upper surface of the mounting disk is maintained in a uniform thickness without waviness, and as a result, high-quality granulation with uniform particle size is possible.

Moreover, since the peripheral edge of the upper disk is formed in a downwardly sloping shape, the hot air blown from above the spray disk easily flows downward along the upper surface of the peripheral edge of the upper disk, so turbulence of hot air is less likely to occur. As a result, it is possible to prevent the atomized stock solution or the dry powdered product from soaring upward.

Therefore, the intended purpose can be achieved.

[Brief description of drawings]

Drawing shows one example of the present invention, FIG. 1 is a sectional view, and FIG.
The drawing is an enlarged sectional view taken along line 2-2 of FIG. 3, and FIG. 3 is a sectional view in a state of being installed in a spray dryer. In the figure, A is a spraying disc, 1 is an upper disc, 1a is a peripheral portion thereof, 2
Is a mounting disk, 2a is an upper surface thereof, 3 is a column, 4 is a window hole for supplying an undiluted solution, and 5 is a rotary shaft mounting portion.

Claims (1)

[Scope of utility model registration request] 1. A spray-dryer comprising a lower disk having an undiluted solution supply window hole formed in the center thereof, and a mounting disk having a rotary shaft mounting portion projecting at the center of the upper surface integrally formed through an appropriate number of columns on the lower surface of the upper disk. In a spray disc for a machine, the upper surface of the mounting disc is formed in a gentle slope downward from the center toward the outer peripheral edge, and the peripheral part of the upper disc is formed in a gentle slope downward. .