Multiple Silos Single Weigh Type

The multi-silo single-weighing static automatic batching system is an automated batching device that can be used in conjunction with BB fertilizer equipment, organic fertilizer equipment, compound fertilizer equipment, and blended fertilizer equipment. This equipment is used for weighing, distributing, and mixing multiple raw materials individually, replacing manual platform scales or volumetric metering methods. It features high metering accuracy, fast distribution efficiency, and a high degree of automation, making it a key component of complete fertilizer production equipment.

The core design concept of the multi-silo single-weighing static automatic batching system is "one scale for unified batching, shared by multiple silos"—each raw material silo is independently equipped with a feeding device, but shares the same high-precision weighing unit. This "multiple silos, one scale" design effectively avoids the problems of weighing deviation and data asynchronization caused by multiple scales. The system adopts static weighing and batching, and dynamic material distribution, ensuring that the batched materials achieve a good pre-mixing effect before entering the mixer, absorbing the advantages of both dynamic and static batching. The equipment has multiple operating modes, including single-hopper single-material, single-hopper multi-material, and multi-hopper multi-material. Scientific and reasonable selection and matching can ensure the equipment operates in the most economical state, maximizing return on investment.

Equipment Structure

The multi-silo single-weighing static automatic batching system has the following distinct structural features:

(I) Storage System: The number of silos depends on the type of material in the formula, typically 3-8 silos. Each silo is equipped with a level sensor (such as an ultrasonic level gauge or a rotary paddle level gauge). The silo body is made of carbon steel or stainless steel to adapt to different material characteristics. Silos for special materials such as wet sand have a 60° open discharge design.

(II) Feeding System: Each silo is equipped with a vibrator, a rotary valve, and pneumatic batching valves (pneumatic butterfly valves, slide gate valves), etc., for feeding. Depending on the material characteristics, various types such as electromagnetic vibrating feeders and screw feeders can be selected. The feeding system uses pneumatic actuators, ensuring reliable operation and simple maintenance.

(III) Weighing System: All silos share the same weighing unit. Flexible connections are provided at the top and bottom of the weighing hopper to reduce friction interference during the weighing process. High-precision sensors and an advanced control system effectively ensure batching accuracy. (iv) Discharge and Conveying System: This includes pneumatic flap valves (or electric valves), belt conveyor covers (for batching materials containing dry powder, covers must be installed), conveyors, mixing tanks, bucket elevators, etc. The belt conveyor covers effectively prevent dust from escaping.

(v) Control System: Employs PLC high-speed sampling processing instrument communication and digital frequency conversion technology. It is equipped with RS-232C or RS485 communication interfaces for networking with a host computer.

Application range of equipment

Multi-silo single-weighing static automatic batching systems are widely used in industries such as fertilizers, chemicals, building materials, and metallurgy. In fertilizer production, they can precisely batch various raw materials such as nitrogen, phosphorus, potassium, and organic matter. In the chemical industry, they can be used to mix multiple chemical raw materials, ensuring product quality and production efficiency. In compound fertilizer processing, they are automated batching equipment specifically designed for compound fertilizer production. In organic fertilizer production, they are suitable for the production of various fertilizers, including organic-inorganic compound fertilizers and formulated fertilizers.

Types of available raw materials

The multi-silo, single-unit static automatic batching system can handle a wide variety of raw materials. Fertilizer raw materials include urea, potassium chloride, potassium sulfate, monoammonium phosphate, and diammonium phosphate. Organic raw materials include livestock and poultry manure, crop straw, humic acid, peat moss, and well-rotted organic matter. Additives include trace elements and biological agents. Each silo is independently configured, effectively preventing cross-contamination during the batching process.

Working principle of the equipment

The multi-silo single-weighing static automatic batching system operates on the principle of coordinated operation of sensors, PLC controllers, and actuators. According to the set formula, the system sequentially controls the feeding devices of each silo to add material to the weighing hopper. Weighing sensors monitor weight changes in real time, stopping feeding when the set value is reached. All materials are discharged uniformly after batching.

Equipment operation method

(I) Pre-start Preparation: Check that each hopper has sufficient raw materials. Check that the weighing sensors and junction boxes are functioning properly. Check that the feeding device is operating normally. Check that the pneumatic system pressure is normal.

(II) Formula Setting and Startup: Retrieve or input the formula through the human-machine interface. Set the target weight and error range for each raw material. Start the automatic batching program.

(III) Operation Monitoring: Monitor the weighing data displayed on the instrument or host computer in real time. Observe the operating status of each piece of equipment.

(IV) Shutdown Operation: After completing the batching task, shut down each piece of equipment in sequence.

Equipment maintenance methods

(I) Daily Maintenance: Inspect the equipment daily. Observe whether the scale body is deformed or corroded. Check whether the sensors, junction boxes, and cables are normal.

(II) Periodic Maintenance: Clean, lubricate, and calibrate the equipment regularly. Regularly check the feeding/discharging mechanism, pneumatic valves, flexible connections, and other components. Regularly check the working status of the vibrator.

(III) Calibration Management: The system should be calibrated regularly.

Application of equipment in production line

The multi-silo single-weighing static automatic batching system is located between raw material storage and mixing in the fertilizer production line, undertaking the core task of precise batching. The equipment can be seamlessly integrated with crushing, mixing, granulation, and packaging equipment to form a complete automated production line.

The target audience for the equipment

The target audience for multi-silo single-weighing static automatic batching systems mainly includes: equipment procurement and selection personnel in fertilizer production enterprises; production line process designers; equipment management personnel; and various fertilizer production enterprises that need to achieve automated batching and improve batching accuracy.