We are pleased to announce that we have officially been granted a patent for the technology related to the Coanda Disc (Spray Disc, Atomization Device, and Spray Drying Apparatus), which we have recently developed.

Patent Overview
Title: Spray Disc, Atomization Device, and Spray Drying Apparatus
International Publication Number: WO2019/224967
International Publication Date: November 28, 2019
Patent Holder: PRECI Co., Ltd.
URL: https://www.j-platpat.inpit.go.jp/c1801/PU/JP-2019-224967/19/ja

Key Features of the Technology
This invention relates to a core component technology for rotary atomizers, including the Coanda Disc which was developed by us. The Coanda Disc applies the Coanda effect, whereby a fluid jet tends to be attracted to and follow a nearby surface, to the behavior of liquid flowing across a rotary atomizer disc. Compared with conventional atomizer discs, this innovative technology significantly improves the production efficiency of spray dryers and spray coolers. With conventional atomizer discs, droplets are typically discharged in a horizontal direction due to centrifugal force. The Coanda Disc, however, features a dome-shaped structure with the lower plate extended downward in a curved profile. This design redirects the spray pattern downward rather than horizontally. As a result, the fall-down time of droplets becomes longer before reaching the chamber wall, enabling more effective utilization of the chamber space. Consequently, when producing the same liquid material under identical particle size and processing capacity conditions, the use of the Coanda Disc allows for a smaller chamber design, leading to lower capital investment and installation costs.

CEO’s Comment
Through extensive CFD (Computational Fluid Dynamics) simulations and validation tests using high-speed cameras, we have successfully developed a geometry that maximizes the Coanda effect. In demonstration tests conducted both internally and jointly with our customers, we achieved improved product yield in applications including fine ceramic materials such as alumina and silicon carbide, as well as food products such as dextrin and sugars. By adopting the Coanda Disc, manufacturers can reduce product deposition on chamber walls and improve production yield. We believe that the grant of this patent recognizes the powder processing expertise and research achievements that we have cultivated over many years. Through the commercialization of products utilizing this patented technology, we will continue to support our customers solve challenges in both R&D and manufacturing operations. We remain committed to developing proprietary technologies, strengthening our intellectual property portfolio, and driving continuous technological innovation.

Hayato Kato, Group CEO

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