Production and Evaluation of Pressure Vessel for Highly Effective Rice Powder Manufacturing Using Underwater Shock Wave

The rice-powder paid to attention in Japan, because rice-powder is able to process the various foods. But, conventional method of manufacturing rice-powder generates heat when crushing of rice. The pressure vessel for rice-powder using underwater shock wave at Okinawa National College of Technology has been developed. Merit of this crushing processing is dryness and non heating. The decrease of the manufacturing cost can be expected. The power supply to generate the pressure vessel and the shock wave for crushing and the transportation device of rice was developed. The amount of the milling flour of the first prototype device was 450[g/h]. Then, the pressure vessel is improved, the shock wave generation energy is improved, and the amount of the milling flour has been improved with 2kg per hour. In this report, the outline of the improved device is described. And, the factor that influences the milling flour is shown, and the evaluation method is described.