Grain screening principle and screening instrument

Grain screening principle and screening instrument

Screening refers to the method of sorting materials against one or more layers of stationary or moving screens depending on the particle size of the material. Since the main object of screening and gravity sorting is grain, it is called between the solid and the liquid and is called a granular body by its nature. The bulk particles have fluidity and automatic grading properties. The grain filter is used to test the impurity content of grains and oil samples, the content of rice and earthworm powder, determine the quality grade of a kind of inspection instrument, and determine a specific instrument for pest density and insect grain level standards.

Principle of grain screening: Separation according to the width, thickness or shape of the material: 1. Separation according to the thickness of the grain: Rectangular mesh is separated according to the thickness of the material. 2. Separation according to the width of the grain: The round sieve is mainly separated according to the width of the material. 3. Separation according to the shape of the grains: The triangular meshes are mainly separated according to the shape of the material.

Among them, the electric filter (new national standard) is developed and produced according to the latest national standard GB5494-2008 "Grain Inspection Grain, Oil Inspection Impurity, Imperfect Grain Inspection Method", and is suitable for screening and determination of grain and oil after matching with grain screening. , is the necessary sieve and grading equipment for agricultural breeding. The main technical parameters of the electric filter (new national standard) are: maximum sieve volume: 500g; sieve frame level: 3 layers; 3. sieve width: 100mm; rotation speed: 115±5r/min; forward and reverse time: 60±2 %s/60±2%s; supporting sieve outer diameter: 220mm.

The above instruments are often used in grain screening, which play an important role in grain and oil testing. The circular powder screening is used to determine the fineness of powders. Although the screening targets are different, they are important instruments for grain and oil testing. These instruments help us to successfully carry out the identification and screening of various grain and oil quality.