Powder Fertilizer Packing Machine

Equipment Introduction

The Powder Fertilizer Packing Machine, also known as an automatic quantitative packaging machine for powdered fertilizers, is an automated metering and filling packaging device specifically designed for powdered and powdery fertilizers. It is the core equipment at the end of the entire organic fertilizer, compound fertilizer, and water-soluble fertilizer production line, responsible for automatically weighing, filling, sealing, and conveying the finished fertilizer to a set weight, completing the final transformation from bulk material to commercially packaged bagged product.

This equipment uses electronic weighing principles to weigh and package materials, typically equipped with a three-speed screw feeding system (fast, medium, and slow), featuring high precision, high speed, and no dust pollution. The powder fertilizer packaging machine is the final piece of equipment in the complete process of "fermentation—pretreatment—crushing—screening—packaging" in a powdered organic fertilizer production line.

Unlike granular fertilizer packaging machines, powder fertilizer packaging machines need to specifically address the special problems of poor powder flowability, easy dust generation, and easy moisture absorption and clumping. Therefore, it has specialized designs in feeding, dust removal, and sealing.

Complete Equipment Structure

The entire machine is divided into five main modules: a material storage and arch-breaking unit, a screw feeding and metering unit, a weighing and bag clamping unit, a dust removal and conveying auxiliary machine, and an electrical control system.

1. Material Storage and Buffer Silo: Large-capacity carbon steel silo with a Teflon anti-stick coating on the inner wall, a vibrating arch-breaking motor on the side wall, and an internal stirring rod. It is linked to a high and low level gauge and a front-end elevator for automatic material replenishment.

2. Double Screw Feeding Mechanism (Core Metering Component): Coarse screw (rapidly fills 80% of the target weight) + fine screw (micro-feeding with precise control), frequency conversion independent speed regulation; the screws are polished for wear resistance and are resistant to acid, alkali, and fertilizer corrosion.

3. Weighing and Bag Clamping Assembly: High-precision cantilever weighing sensor, independent weighing hopper (net weight type) / hanging bag weighing frame (gross weight type); pneumatic widened clamps, and a ring-shaped sealed dustproof skirt to completely cover the bag opening during filling to prevent powder spray.

4. Supporting Auxiliary Equipment: Negative pressure pulse dust collector, belt conveyor, column-mounted bag sewing machine/heat sealing machine, automatic bag loading robot (optional), bag leveling machine.

5. PLC Intelligent Control System: Touchscreen operation, stores multiple fertilizer formulas, features automatic zero-point calibration, over-tolerance audible and visual alarms, production statistics, and fault self-diagnosis functions. The entire machine is reliably grounded to prevent static electricity, dust, and explosions.

Working Principle of the Equipment

The working process of the powder fertilizer packaging machine is an automated closed-loop control process:

Step 1: Manual Bagging

The operator places an empty bag over the discharge port, triggering a bag clamping signal.

Step 2: Pneumatic Bag Clamping and Automatic Tare

The bag clamping cylinder actuates to grip the bag, the discharge gate automatically closes, and the weighing system automatically tares and zeros the scale.

Step 3: Graded Feeding

The feeding mechanism feeds material into the weighing hopper (or directly into the packaging bag) sequentially at three flow rates: fast, medium, and slow.

Initially, fast feeding quickly fills most of the weight.

When the weight approaches the target value, it switches to medium-speed feeding.

When the precise measurement value is reached, it switches to slow feeding to accurately replenish the material to the target value.

Step 4: Weighing Judgment

The pressure sensor converts the weight into an electrical signal and transmits it to the instrument for data processing. Once the set target weight is reached, the feeding process ends, and the weighing success indicator light illuminates.

Step 5: Material Discharge and Bag Drop

After the feeding cylinder closes, the discharging cylinder at the bottom of the metering hopper activates, opening the discharging gate. Material fills the packaging bag by its own weight. After discharging, the discharging gate closes, and the bag clamping mechanism automatically opens to unload the bag.

Step 6: Conveying and Sealing

The packaging bag automatically falls onto the conveyor belt and is sent to the sewing machine or heat sealing machine for sealing. At the end of one work cycle, the control instruments automatically enter the next work cycle.

Applicable Raw Materials (Fertilizer Industry-Specific Powders)

Suitable Packaging Materials:

1. Inorganic Powder Fertilizers: Monoammonium Phosphate, Potassium Dihydrogen Phosphate, Potassium Chloride, Potassium Sulfate, Compound Fertilizer Raw Material Powder, Soil Conditioner Powder;

2. Organic Powder Fertilizers: Well-rotted Chicken/Cow Manure Organic Fertilizer Powder, Humic Acid Powder, Seaweed Powder, Amino Acid Powder Water-soluble Fertilizer;

3. Functional Powders: Microbial Agents, Micronutrient Powders, Foliar Fertilizer Raw Materials, Bentonite Coating Powder.

Restricted Materials: Moisture Content > 8%, Strongly Sticky Slurry, Ultra-long Fiber Powder (Easily Wrapped in Spirals), High-Temperature Melting Powders.

Applications of the Equipment

The powder fertilizer packaging machine is mainly used in the following fields:

1. Production of Powdered Organic Fertilizer

For packaging powdered organic fertilizers such as humic acid powder, bone meal, fish meal, rapeseed cake powder, earthworm castings powder, and compost powder.

2. Water-soluble Fertilizer, Fertilizer for Drip Application, and Foliar Fertilizer

Automatic metering and packaging of powdered water-soluble fertilizers, macro-element water-soluble fertilizers, and humic acid water-soluble fertilizers.

3. Compound Fertilizer and Blended Fertilizer

Packaging of compound fertilizer powders and blended fertilizer powders.

4. Fertilizer Raw Materials

Ammonium sulfate, ammonium bicarbonate crystals, phosphate fertilizers, potash fertilizers, BB fertilizers, formulated fertilizers, and micronutrient fertilizers.

5. Other Powdered Materials

Quantitative packaging of powdered materials such as pesticide powder, additives, flour, feed, and chemical raw materials.

Common Faults, Causes, and Standardized Solutions

Equipment Application in Production Lines

1. Core Position in Powdered Organic Fertilizer Production Lines

The powdered fertilizer packaging machine is the final, final piece of equipment in the entire powdered organic fertilizer production line.

Complete Processing Flow:

Livestock/Poultry Manure/Straw/Biogas Sludge → Fermentation Treatment (Combustion Turner) → Raw Material Crushing (Semi-Wet Material Crusher) → Screening and Grading (Drum Screen) → Automatic Packaging (Powdered Fertilizer Packaging Machine)

The powdered organic fertilizer production line eliminates the need for granulation and drying equipment. The equipment is simple to configure, has low investment costs, a small footprint, and a short commissioning period. As the final piece of equipment, the packaging machine directly determines whether the finished product can successfully enter the market.

2. Application in Powdered Water-Soluble Fertilizer Production Line

The complete process of a fully automated powdered water-soluble fertilizer batching and packaging production line is as follows: Manually pour raw materials into the low-level raw material silo → Automatic bucket elevator lifts the material to the high-level batching and storage silo → Automatic batching according to the formula (electronic weighing) → Automatic unloading to the mixer → Automatic uniform mixing → Automatic unloading to the quantitative packaging machine hopper (automatic material level control) → Manual bagging → Automatic weighing and metering by a screw scale → Automatic filling → Automatic bag dropping → Conveying → Inner bag heat sealing → Outer bag sewing

3. Supporting Equipment

Powdered fertilizer packaging machines typically require the following equipment:

Feeder/Screw Elevator: Lifts materials to the packaging machine hopper

Conveying Device: Conveys the packaged finished product to the sealing station

Bag Sewing Machine/Sealing Machine: Completes the sealing of the packaging bags

Dust Removal Equipment: Controls dust during the packaging process

Air Compressor: Provides compressed air for pneumatic actuators

Target Customers:

1. Professional manufacturers of powdered organic fertilizers, water-soluble fertilizers, and phosphorus-potassium compound fertilizers;

2. Large-scale livestock groups with their own manure powdering processing workshops;

3. Manufacturers of humic acid, microbial agents, and soil conditioner powders;

4. Fertilizer complete equipment integrators and fully automated packaging and palletizing line service providers;

5. Agricultural input trading and packaging warehouses, and overseas customers purchasing powdered fertilizers.

Comprehensive Technical Features of the Equipment:

1. Compliant Metering: Dual-speed spiral dynamic weighing ensures accuracy meets national agricultural input measurement standards, preventing customer complaints.

2. Environmentally Friendly, Dust-Free, Fully Enclosed Filling + Negative Pressure Dust Removal: Meets environmental protection standards for high-dust powder fertilizer production.

3. Corrosion-Resistant and Durable: Made of corrosion-resistant and durable stainless steel, suitable for long-term use with acidic and high-salt inorganic fertilizers.

4. Anti-Clogging, Stable Vibration + Agitation for Double Arch Breaking: Solves the problem of moisture absorption and bridging in organic fertilizer powder.

5. Automated and Flexible: Can be used with a single machine for easy filling or as part of a fully automated palletizing line, significantly reducing labor costs.

6. Easy Maintenance: Modular spiral and weighing components allow for cleaning and parts replacement by a single person.