The principle of the automatic batching scale for blended fertilizer granules

The automatic batching scale for blended fertilizer particles is an automated device used for precisely measuring various fertilizer particles and mixing them in a set proportion. Its core principle combines weighing technology, automatic control and material conveying technology. The following is a detailed description of its working principle and key components:

I. Composition of the automatic batching Scale System for Blended Fertilizer Granules

Storage bin: Stores different types of fertilizer granules, with each bin corresponding to one type of raw material.

Feeding device: Usually, a vibrating feeder, screw conveyor or belt scale is adopted to control the flow and speed of the particles.

Weighing unit: Composed of high-precision weighing sensors (such as strain gauge type or electromagnetic force compensation type) and weighing hoppers, it monitors the weight of materials in real time.

Control system: PLC or industrial computer, processes weighing data and regulates feeding equipment.

Mixing device: Mix the proportioned particles evenly (optional, some systems directly output the proportioned materials).

Ii. Working Principle of the Automatic Batching Scale for Blended Fertilizer Granules

1. Formula setting

Users input the target ratios of each raw material (such as the ratios of nitrogen, phosphorus and potassium particles) through the human-machine interface (HMI).

2. Automatic feeding

The control system starts the feeding devices (such as vibrating feeders) of the corresponding storage bins in sequence, and the materials fall into the weighing hopper.

Coarse feeding stage: Rapidly feed to 90% to 95% of the target weight to reduce waiting time.

Fine feeding stage: Reduce the feeding speed and gradually approach the target value to avoid exceeding the tolerance.

3. Dynamic weighing

The load cell converts the weight signal into an electrical signal in real time and transmits it to the control system.

The system dynamically adjusts the feeding speed through the PID algorithm to ensure the accuracy (usually the error is ≤0.1% - 0.5%).

4. Completion and mixing of ingredients

When all the raw materials reach the set weight, the materials in the weighing hopper are discharged into the mixer or directly packaged.

If mixing is required, the mixer will evenly mix the particles and then output them.

5. Cyclic operation

The system automatically clears to zero and enters the next batch of batching, achieving continuous production.

Iii. Typical Application Scenarios of Automatic Batching Scale for Blended Fertilizer Granules

Compound fertilizer production line: Realizes the automatic proportioning of nitrogen, phosphorus, potassium and medium and trace element particles.

Water-soluble fertilizer production: Precisely control the mixing ratio of macronutrients and micronutrients.

BB fertilizer blending: According to the needs of field crops, the formula can be quickly adjusted and packaging completed.

Common Problems and Solutions of Automatic Batching Scale for Blended Fertilizer Granules

Particle adhesion: Install silo wall vibrators or air flow blockage removal devices.

Large batching error: Check sensor calibration, feeder wear or air pressure stability.

Cross-contamination: Use pneumatic butterfly valves or rotary valves to isolate different raw materials.

Through the above design, the automatic batching scale has achieved efficient and precise proportioning of blended fertilizer particles, significantly enhancing the level of production automation and the consistency of product quality.