Raw material selection: choose high quality glutinous rice as raw material.

Soaking: firstly, the glutinous rice is elevated to the soaking bucket through the elevator and soaked with water or tap water. Soaking includes backwashing. The water comes from the bottom to the top, discharging the impurities, chaff flakes and other suspended matters in the glutinous rice. Meanwhile, the soaking can make the glutinous rice particles expand, prompting the particles to be loosened and softened, so as to facilitate the crushing in the next process. In general, soak 2-3 hours can be, if the temperature is warm, cold, you can adjust the time. If the summer due to soaking time is too long, produce fermentation, you can take regular water changes to prevent deterioration. In the production can be twisted by hand, such as can be twisted into powder, that is, the soaking time has reached the requirements. Do not use hot water for soaking, branched chain starch itself is soluble in water, straight chain starch is also soluble in hot water to avoid unnecessary loss. At the same time the water temperature exceeds 58 ℃ starch to start paste.

Crushing: crushing can be used diamond mill, diamond mill than the traditional stone mill is superior, with a high yield, fine fineness, a one-time grinding slurry basically meet the requirements, conducive to industrialized continuous production. Crush to constantly add water to ensure that the slurry solids in about 20%. The slurry is required to pass the 60-mesh sieve, and the sieve can be repeated into the mill to crush. Raw material glutinous rice in the mill; beware of metal foreign objects into the mill, so as to avoid damage to the mill groove, shorten the service life, and affect the fineness.

Filtering: rice starch particles are finer than general starch particles, after adding water to crush, the particle size is very small, so it is not easy to precipitate. Choose the plate and frame filter press with large charging capacity, such as BAJZ type or XMZ type, which has a large charging volume of up to 0.75 cubic meters or more, and can press more than 500 kilograms of raw glutinous rice each time.

Drying: The glutinous rice slurry is dewatered through filter press to form filter cake, and then it must be dried in order to be preserved. Adopting airflow drier, in the drying process, the glutinous rice powder particles are suspended in the hot airflow, the wet powder is solubilized, and heat transfer and moisture evaporation are produced immediately, and its drying time is only about 1 second, and the thermal efficiency is also high, generally up to 40% or more. It requires that the moisture content of the material is about 40%. If the moisture is too high, the material is easy to adhere to the pipe wall, causing coking.

Before the water milled glutinous rice flour filter cake air flow dryer, it is first chopped into small pieces of ≤ 5 cm. A screw conveyor is used for charging, and the screw should preferably be a double screw, so as to avoid clogging. The wet powder rises along the spiral, enters the fan inlet duct of the airflow dryer, meets the hot air in the drying cylinder, dries instantly, and finally falls from the cyclone separator.

At this time, the moisture of the water milled glutinous rice flour has met the requirements, but also through a 80-mesh sieve, sieve the powder that is the water milled glutinous rice flour finished products, packaged and ready to go into storage.