Core pre-treatment system
As the first line of defense for grain storage silo, grain pre-cleaning equipment adopts a multi-layer screen and wind selection combination design, which can efficiently separate large impurities such as straw and sand. A large grain company’s measured data showed that installing pre-cleaning equipment reduced the storage loss rate of silos by 18%.
The cylindrical cleaning screen generates centrifugal force by rotating the inclined cylinder, which is particularly suitable for the grading of particles such as wheat and corn, and the processing capacity can reach 20 tons/hour. The vibrating cleaning screen applies the principle of high-frequency vibration and comes equipped with a replaceable screen module. It removes more than 98% of fragile grains such as rice.
Intelligent sorting and conveying system
The cleaning and sorting machine adopts CCD image recognition technology, which can accurately identify moldy grains and grains of different colors. The latest model has a sorting accuracy of 0.2mm. Operators configure the elevator with a bucket or chain structure according to the height of the silo, achieving a vertical lifting efficiency of up to 50 tons per hour.
The design of the matching unloading pit needs to consider the anti-blocking structure. It is recommended to use a 45° inclined steel plate lined with wear-resistant ceramics. The conveyor system recommends the use of a fully enclosed scraper conveyor to reduce grain breakage and prevent dust from spilling.
Digital monitoring and packaging
Manufacturers equip modern grain storage silo with grain silo level sensors as standard, including radar and capacitive types. The monitoring error is controlled within ±0.5%. A case of grain depot renovation in a certain province shows the impact of technological upgrades. After the installation of a temperature and humidity monitoring system, the grain quality qualification rate increased by 23%.
The grain bag filling machine adopts a servo control system, and the 25kg packaging error does not exceed ±0.1kg. The cleaning spiral can achieve a material recovery rate of more than 98%. It is particularly noteworthy that the equipment layout should follow the linear process of “pre-cleaning-lifting-sorting-warehousing”. In the typical configuration, the power ratio of the conveyor and the elevator is 1:1.5.
Maintenance and optimization suggestions
Regularly check the wear of the cleaning screen. It is recommended to replace it every 200 working hours. The monitoring equipment needs to be zero-calibrated every month. The installation position of the material level sensor should avoid the vortex area in the center of the silo. Actual operation data shows that the energy consumption of supporting equipment is significant. It accounts for about 35% of the total operating cost of grain storage silo. Optimizing equipment linkage control can reduce electricity consumption by 8-12%.
