JPH084081Y2 - Nozzle device in spray dryer - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle device in a spray dryer in which fine mist sprayed from a spray nozzle is brought into direct contact with a heating gas (heating air or the like) for drying.

[0002]

2. Description of the Related Art In a spray dryer, if the position of a spray nozzle is not accurate with respect to the flow of heating gas, the spray pattern of fine mist sprayed from the spray nozzle is disturbed, and the spray pattern of fine mist is sprayed. If the turbulence does not match the flow of the heating gas, the particle size of the dried product tends to be uneven.

However, in the conventional nozzle device of this type, since the nozzle tube is fixedly attached to the side wall of the dryer main body and the spray nozzle is rotatably attached to the tip of the nozzle tube, the flow of the heating gas is reduced. On the other hand, there is a problem that it is not easy to position the spray nozzle accurately.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and spray drying in which the position of the spray nozzle can be easily and accurately arranged with respect to the flow of heating gas. It is intended to provide a nozzle device in a machine.

[0005]

A nozzle device in a spray dryer according to the present invention that achieves the above object has a holder case attached to a nozzle installation hole formed in a side wall of a dryer main body so as to be rotatable in the left-right direction. A nozzle holder is attached to the holder case so as to be vertically rotatable, and a nozzle tube provided with a spray nozzle is attached to the nozzle holder so as to be movable in the front-rear direction.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. Nozzle installation hole 1 for installing the nozzle device A
Is formed in the side wall 2 of the dryer main body B in a penetrating manner by one or a plurality of openings (four in the embodiment).

The nozzle device A is provided with a holder case 3 that rotates in the left-right direction with respect to the nozzle installation hole 1, a nozzle holder 4 that rotates in the up-down direction, and a spray nozzle 5 at the tip, and is movable in the front-back direction. And the nozzle tube 6 to be assembled.

The holder case 3 comprises a cover plate 31 for covering the nozzle installation hole 1 and a support ring 32 for supporting the nozzle holder 4 so as to be rotatable in the vertical direction. Rotatably attached to.

That is, the cover plate 31 of the holder case 3 is formed in a disk shape having a diameter slightly larger than the outer diameter of the nozzle installation hole 1, and a plurality of elongated holes 33 are concentrically arranged at equal intervals on the outer peripheral edge thereof. Each elongated hole 33 is engaged with a fixing bolt 11 protruding from the outer edge of the nozzle installation hole 1 so that the holder case 3 as a whole can be rotated in the left-right direction with respect to the nozzle installation hole 1. At the same time, the fixing nut 12 screwed onto the fixing bolt 11 is fixedly attached to the rim of the nozzle installation hole 1.

Further, the support ring 32 of the holder case 3
Is formed in a circular ring shape having a diameter smaller than the inner diameter of the nozzle installation hole 1, and the inner peripheral surface thereof is formed in an arcuate cross section curved in a direction orthogonal to the circumferential direction of the support ring 32.
It is attached integrally to the back side of 31, and the nozzle holder 4 is attached to the inner peripheral surface.
Is attached so that it can rotate in the vertical direction.

The nozzle holder 4 includes a drum portion 41 that is vertically rotatably assembled to the support ring 32 of the holder case 3 and a holder portion 42 that supports the nozzle tube 6 so as to be movable in the front-rear direction. The holder case 3 is configured to be rotatable in the vertical direction.

The drum portion 41 of the nozzle holder 4 is formed in a circular ring shape that is in sliding contact with the inner peripheral surface of the support ring 32 of the holder case 3, and the support ring of the holder case 3 is orthogonal to the circumferential direction of the support ring 32. It is attached to 32 so as to be rotatable in the vertical direction, and a part of it is attached to the cover plate of the holder case 3.
It is made to project from a mounting hole 34 formed in 31 and fixed to a fixing plate 7 standing on the outside of the lid plate 31 of the holder case 3 at a predetermined position via bolts and nuts 8a and 8b.

The nozzle holder 4 is a holder case 3
Not only is it supported on the inner peripheral surface of the support ring 32, but also the rotary shaft 43 projecting from the left and right center of the drum portion 41 is rotatably supported by the bearing formed on the support ring 32 of the holder case 3. .

The holder portion 42 of the nozzle holder 4
Arranges the inner pipe 42c coaxially inside the outer pipe 42a via the bush 42b, and projects one of the inner pipes 42c (the one located outside the dryer main body B) from the outer pipe 42a. A fixing chuck 42d for supporting the nozzle tube 6 so as to be movable in the front-rear direction is attached to the portion, and is penetrated into the drum portion 41 in a skewered shape to be integrally fixed.

One end of the nozzle tube 6 is communicated with a supply source of the stock solution, and the spray nozzle 5 is integrally attached to the tip thereof,
The nozzle holder 4 is attached to the holder portion 42 so as to be movable in the front-rear direction.

In the spray nozzle 5 provided at the tip of the nozzle tube 6, the holder case 3 is rotated in the left-right direction with respect to the nozzle installation hole 1 formed in the side wall 2 of the dryer main body B. If the nozzle holder 4 is rotated in the vertical direction, the nozzle holder 4 is moved in the vertical direction. If the nozzle tube is moved in the front-back direction, the nozzle holder 4 is also moved in the front-back direction. Can be moved to any desired position and placed.

Then, as shown in FIGS. 3 and 4, the position of the spray nozzle 5 of the nozzle device A which is penetratingly installed on the side wall 2 of the dryer main body B is properly arranged with respect to the flow of the heating gas G. The particulate mist M sprayed from the spray nozzle 5 is brought into direct contact with the heating gas (heating air or the like) G and dried to obtain a particulate product S.

[0018]

Since the nozzle device in the spray dryer of the present invention is constructed in this way, it is possible to easily move and set the spray nozzle to any desired position, thus spraying against the flow of heating gas. The position of the nozzle can be arranged easily and accurately.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of the present invention.

FIG. 2 is a front view showing a cutaway portion of the same portion.

FIG. 3 is a schematic cross-sectional view illustrating a usage state of the nozzle device according to the present invention.

FIG. 4 is a schematic cross-sectional view of the same.

[Explanation of symbols]

 A: Nozzle device B: Dryer body 1: Nozzle installation hole 2: Side wall 3: Holder case 4: Nozzle holder 5: Spray nozzle 6: Nozzle tube

Claims (1)

[Scope of utility model registration request] 1. A holder case is attached to a nozzle installation hole formed in a side wall of a dryer body so as to be rotatable in the left-right direction,
A nozzle device in a spray dryer, wherein a nozzle holder is attached to the holder case so as to be vertically rotatable, and a nozzle tube having a spray nozzle is attached to the nozzle holder so as to be movable in the front-rear direction.