First, the brown rice was milled after many machines to […]
First, the brown rice was milled after many machines to remove broken rice and glutinous rice. After sprayed with water and rice, the binding force between the endosperm and the rice bran was reduced. Since only a little water was added, only a layer was formed on the surface of the rice grain. The thin film, combined with a short polishing time, has no effect on the moisture content of the rice), and then enters the polishing chamber of the rice polisher, and the surface of the rice grain is polished by friction under a certain pressure and temperature. Through the polishing treatment, not only the floating surface of the rice grain can be removed, but also the starch is pregelatinized and gelatinized on the surface of the rice starch, and the starch gelatinization makes up for cracks, thereby obtaining the appearance of crystal color and smoothness, improving the storage performance and utility of the rice. Quality, and therefore polished rice is very necessary.
The main structure of various types of rice polisher is similar to the main structure, mainly consists of the spray water part, the polishing part, the water supply system and the air blowing mechanism. The feed device and the discharge device are also important devices for various types of rice polisher.
1. Spray water cosists of the nozzle, nozzle cleaner, water mixer, feeding spiral, stirring roller and other components. When the material passes through the flow meter, the flow rate is measured, thereby controlling the amount of water added.
2. The polishing part is the core part of the rice polishing machine. It is composed of feeding screw, polishing roller, octagonal screen cylinder composed of eight meters of rice, and discharge pressure gate. The polishing roller is divided into iron roller and sand roller according to the nature of the material. The design should make it clear that the line speed of the roller is higher than that of the iron roller (the speed of the iron roller is about 5m/s, the polishing pressure is higher, and the average value is 0.1MPa. The roller speed is about 15m/s, and the polishing pressure is low, with an average value of 0.02MPa).