The batching system of an NPK fertilizer production line determines nutrient accuracy.
The batching system is the heart of an NPK fertilizer production line; its accuracy directly determines whether the nitrogen, phosphorus, and potassium nutrients in the fertilizer meet standards, and is a core element in ensuring consistent product quality. Modern NPK fertilizer production lines generally adopt fully automated computer-controlled batching systems, consisting of raw material buffer silos, electronic belt scales, screw conveyors, and PLC control cabinets. This system enables simultaneous and precise addition and automatic mixing of multiple raw materials, significantly reducing manual intervention and errors, and providing a uniform raw material base for the subsequent granulation process in the fertilizer granulator.
The process works by using electronic weighing sensors to collect the weight signal of each raw material in real time, transmitting it to the PLC control system. The system automatically adjusts the screw conveyor speed according to the preset formula, controlling the raw material addition speed and ensuring that the addition error of each raw material does not exceed ±0.2%. Operators only need to input the target formula on the touchscreen, such as a general formula or a formula specifically for fruit trees, and the system automatically completes the batching process. The batched raw materials are evenly conveyed to a horizontal mixer, thoroughly mixed, and then sent to the fertilizer granulator.
In daily operation, electronic belt scales need to be calibrated regularly to avoid weighing deviations; screw conveyors need to be checked for blockages and leaks to ensure smooth conveying; raw material buffer silos need to maintain reasonable material levels to prevent material shortages from affecting continuous production. For NPK fertilizer production lines that add organic fermented materials, it must be confirmed before batching that the organic materials have been fully decomposed by the fertilizer turning machine to avoid undecomposed raw materials affecting batching accuracy and subsequent granulation quality. The application of automated batching systems not only improves the production efficiency of NPK fertilizer production lines but also ensures that the nutrient content of each batch of fertilizer is consistent, meeting the needs of large-scale and standardized production.