PL175714B1 - Pneumatic atomiser - Google Patents

Abstract

Pneumatic flow atomizer swirled, containing a plenum chamber, swirl chamber and steering elements causing the swirling movement of the gas or liquid, characterized in that it has a collector annular (1) connected by tubes (2) with head (3), containing the plenum chamber (4) inside which it is located coaxially the air guide (5), limiting the chamber space from the outside vortex (6) on the liquid inflow side it is connected to the liquid guide (7), which has a radial series around its circumference spaced slots (8) with little width.

Description

The subject of the invention is a pneumatic atomizer for spraying liquids.

Swirl-flow pneumatic atomizers are known which are provided with a plenum chamber and a swirl chamber, in which the liquid or gas is swirled through wide gaps, channels or openings tangential to the swirl chamber. From the Polish patent specification No. 112 737 there is known a nozzle for spraying a liquid in which the liquid stream is swirled and directed on a circumferential-radial guide and on a conical guide having orifice guide channels of variable depth. From the book by Z. Orzechowski entitled Spraying of liquids Wydawnictwa Naukowo Techniczne, Warsaw 1976 pp. 145-147 The designs of sprayers with swirling gas and axial movement of the liquid, as well as swirling movement of the liquid and axial movement of the gas are known. The liquid enters the vortex chamber through the axial opening, while the gas is forced into a swirl in the tangential cutouts of the appropriate plate or in a screw turbulator.

The disadvantages of the described sprayers are: separation of liquid droplets on the walls of the device resulting in uneven spraying, uneven distribution of liquid in the form of droplets, and a low flow rate of sprayed liquid - in the order of several hundred kilograms per hour.

The pneumatic sprayer according to the invention has an annular manifold connected by means of pipes to the sprayer head in which the equalizing chamber is located. Inside the plenum chamber there is a coaxial air guide, which delimits the vortex chamber space from the outside. The swirl chamber is connected to the liquid guide on the side of the liquid inflow, which has a series of small, radial slots along its circumference. The axes of these cross-sectional slots form an acute angle y with the vertical axis of the liquid guide, most preferably up to 30 °.

The advantages of the atomiser according to the invention are: very good atomization accelerating the evaporation time of the droplets, the required optimum spraying angle preventing the separation of drops and ensuring even distribution of the liquid in the droplet stream, and a very large flow rate of the sprayed liquid - in the order of several tons per hour.

The subject of the invention is shown in the embodiment in the drawings, in which Fig. 1 shows the pneumatic atomiser in cross-section AA, Fig. 2 - the atomizer in the front view, Fig. 3 - the liquid guide of the pneumatic atomizer in the front view, and Fig. 4 - BB cross-section of the liquid guide.

The pneumatic sprayer consists of an annular manifold 1 connected by four tubes 2 to a head 3, in which there is an equalizing chamber 4. Inside the equalizing chamber 4 there is an air guide 5, connected with the head 3 preferably by thread. The air guide 5 has four longitudinal holes 9

175 714 tangential to the swirl chamber 6, which is connected by a seal 11 to the liquid guide 7, made in the form of a circular plate, with a series of narrow slots 8 radially arranged around the circumference, through a seal 11.

The pneumatic atomizer described above works as follows: compressed air flows to the annular manifold 1, from which it is fed through pipes 2 to the atomizer head 3 containing the equalizing chamber 4. The atomization of the liquid is obtained by the action of perpendicular air streams, which are obtained in the oblong holes 9 5 very high speed air guide. The liquid deflector 7 of the slotted type provides a thin liquid film with a thickness of 0.3-0.5 mm, flowing out of the radially arranged slots 8. The threaded connection of the head 3 with the air deflector 5 enables the quick exchange of the slotted liquid guide 7, depending on the required flow and degree fragmentation of the sprayed liquid.

The pneumatic atomiser according to the invention is used for spraying various types of liquid in the form of aerosols, e.g. mists over large surfaces.

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Publishing Department of the UP RP. Circulation of 90 copies. Price PLN 2.00

Claims (2)

Patent claims 1. Pneumatic swirl flow sprayer containing a surge chamber, a swirl chamber and steering elements causing a swirling movement of a gas or liquid, characterized in that it has an annular manifold (1) connected by tubes (2) with a head (3) containing an equalizing chamber (4) inside which the air guide (5) is coaxially located, which delimits from the outside the space of the swirl chamber (6), which is connected to the liquid guide (7) on the side of the liquid inflow, which has a series of small radial slots (8) on its circumference. 2. A pneumatic atomiser according to claim The method of claim 1, characterized in that the axes of the slots (8) in cross section form an acute angle (γ) with the vertical axis of the liquid guide (7), most preferably up to 30 °.