Purui Agricultural Greenhouse Film Washing Line

Product Overview

The Purui Agricultural Greenhouse Film Washing Line is a customized, full-process pre-treatment production line for waste plastic films. It integrates crushing, washing, and dewatering into one operation, effectively handling various types of film waste such as high-silt agricultural greenhouse films, industrial packaging stretch films, BOPP/CPP waste films, courier plastic bags, and adhesive composite films. Through multiple stages, it thoroughly removes silt, ink, and both light and heavy impurities, ultimately producing clean, dry film material that can be directly fed into subsequent pelletizing processes. This production line offers a processing capacity ranging from 500 to 2,000 kg/h, with outstanding performance metrics: a silt and dust removal rate of ≥96%, a post-extrusion moisture content of ≤5%, and a water recycling rate of ≥88%. Additionally, the entire process features fully automated belt conveyance, significantly reducing labor costs, while wear-resistant friction chambers and screens help extend equipment lifespan.

Technical Principles and Process Flow

This production line employs a five-stage closed-loop process—crushing + friction washing + flotation separation + rinsing + squeezing—to efficiently and thoroughly clean waste films. Each stage is seamlessly connected, ensuring optimal results:

1. Coarse Crushing Stage: Loose or rolled-up waste films are fed by a belt conveyor into a twin-shaft shredder, where they are coarsely cut into strips measuring 8–15 cm. This effectively breaks up large, bulky clumps, providing an appropriate feed form for subsequent fine crushing and preventing blockages during feeding.

2. Fine Crushing Stage: The strip-shaped film enters a high-speed pulverizer, which cuts it into small fragments measuring 1–3 cm. This dramatically increases the material’s surface area, enabling thorough contact with washing media in subsequent steps and ensuring complete removal of impurities.

3. High-Speed Friction Washing: After entering a horizontal friction washer, spiral blades drive the material through rapid collisions and self-friction, while flowing clean water vigorously strips away surface silt, dust, and loose ink. Removed impurities are discharged through side-wall screens along with wastewater, completing preliminary deep washing.

4. Flotation Separation and Rinsing: Following friction washing, the material flows into a primary flotation tank. During this process, paper labels, airborne dust, and lightweight plastic impurities are carried away with the water flow, while heavier silt and metal debris settle at the bottom. Regular sludge discharge ensures continuous operation, and the material undergoes further deep rinsing via a screw propulsion system, further eliminating residual contaminants.

5. Secondary Clean Water Rinsing + Squeezing: After flotation separation, the material proceeds to a secondary clean-water rinsing stage. Once residual fine impurities are removed, it is sent to a screw-type dewatering machine, where physical squeezing achieves dehydration. Screens filter out remaining fine residues, yielding clean, dry film material with a moisture content of ≤5%, ready for direct connection to downstream pelletizing processes.

Key Performance Parameters

1. Processing Capacity: 500–2,000 kg/h; customizable to meet specific customer throughput requirements.
2. Silt and Dust Removal Rate: ≥96%, ensuring the cleanliness of the final dry film and meeting pelletizing process standards.
3. Post-Squeezing Moisture Content: ≤5%, preventing bubble formation and breakage issues during pelletizing.
4. Water Recycling Rate: ≥88%, significantly reducing water consumption and wastewater treatment costs.
5. Compatible Materials: High-silt agricultural greenhouse films, industrial packaging stretch films, BOPP/CPP waste films, courier plastic bags, adhesive composite films, and other types of film waste.

Core Product Advantages

1. Efficient Water Conservation and Cost Reduction: With a water recycling rate of ≥88% and an 80% reduction in water usage per ton of material, this line drastically cuts water consumption and wastewater treatment expenses, aligning with both environmental sustainability and cost-control objectives.

2. Fully Automated Operations: Automated belt conveyance links all stages, minimizing manual handling. Only two operators are needed to oversee the entire line, cutting labor costs by 65% while avoiding the cleanliness instability inherent in manual operations, thereby enhancing production efficiency and stability.

3. Wear-Resistant Durability: Friction chambers and screens are crafted from wear-resistant materials, capable of withstanding prolonged high-speed friction and abrasive impurities, effectively extending equipment lifespan and reducing maintenance and replacement costs.

4. Deep Washing Ensures Quality: The five-stage closed-loop process achieves a silt and dust removal rate of ≥96%, producing clean, dry film material suitable for direct pelletization. This reduces mesh-changing frequency in downstream pelletizing by 75%, improving production continuity and product quality.

Core Product Value

1. Solves Key Challenges in Plastic Recycling: Effectively addresses industry-wide issues such as frequent clogging of pelletizing machines due to dirty films containing silt, low efficiency and inconsistent cleanliness in manual washing, high water consumption and wastewater treatment costs, and excessive moisture leading to bubbles and breakage during pelletizing, thereby boosting overall efficiency and quality in recycled plastic production.

2. Reduces Costs and Boosts Competitiveness: By conserving water, minimizing labor, and extending equipment life, this solution significantly lowers the total cost of recycled plastic production while simultaneously improving product quality and production efficiency, helping companies gain a competitive edge in the market.

3. Enables Seamless Process Integration: The clean, dry film produced can be directly fed into downstream pelletizing processes, increasing integration efficiency by 50% and reducing material transfer and secondary processing steps, thus optimizing the production workflow.

Target Customer Groups

This product is primarily aimed at film recycling plants, renewable resource industrial parks, large-scale plastic recycling enterprises, and packaging film manufacturers, providing them with efficient, stable pre-treatment solutions for waste plastic films, helping these businesses enhance automation levels and economic benefits in recycled plastic production.

Application Scenarios

The Purui Agricultural Greenhouse Film Washing Line is suitable for various pre-treatment scenarios involving waste plastic films, including the recycling of high-silt agricultural greenhouse films, the pre-processing of industrial packaging stretch films, the clean recovery of BOPP/CPP waste films, the centralized treatment of courier plastic bags, and the removal of impurities from adhesive composite films. It delivers efficient, deep washing tailored to different types of film waste, providing high-quality raw materials for downstream pelletizing processes.

Solutions to Industry Pain Points

1. Resolves Clogging Issues Caused by Silt in Pelletizing: With a five-stage process achieving a silt and dust removal rate of ≥96%, this line dramatically reduces impurity-related clogging problems during pelletizing, lowering mesh-changing frequency by 75% and improving production continuity.

2. Improves Efficiency and Stability of Manual Washing: Fully automated operations eliminate manual handling and hand-washing, requiring only two operators to oversee the entire line. This not only boosts washing efficiency but also ensures consistent cleanliness of the final dry film, avoiding errors caused by human intervention.

3. Reduces Water Consumption and Wastewater Treatment Costs: With a water recycling rate of ≥88% and an 80% reduction in water usage per ton of material, this line significantly cuts fresh water consumption and eases pressure on wastewater treatment, meeting eco-friendly production standards.

4. Prevents Quality Problems in Wet-Material Pelletizing: With a post-squeezing moisture content of ≤5%, this line completely eliminates issues like bubbling and breakage caused by excessive moisture in pellets, thereby enhancing the quality of recycled plastic granules.

Frequently Asked Questions (FAQ)

Q1: Can the capacity of this agricultural greenhouse film washing line be customized?
A: Yes, this product is custom-made with no fixed price. We tailor the production line to meet specific customer throughput needs, offering capacities ranging from 500 to 2,000 kg/h.

Q2: What types of waste films can this production line handle?
A: It can process high-silt agricultural greenhouse films, industrial packaging stretch films, BOPP/CPP waste films, courier plastic bags, adhesive composite films, and other types of film waste, delivering deep washing through its five-stage process.

Q3: How effective is this line in conserving water?
A: With a water recycling rate of ≥88% and an 80% reduction in water usage per ton of material, this line significantly cuts enterprises’ water consumption and wastewater treatment expenses.

Q4: Can the dry film produced be used directly for pelletizing?
A: Yes, the final clean, dry film has a moisture content of ≤5% and a silt and dust removal rate of ≥96%, making it ready for direct connection to downstream pelletizing processes without any additional treatment.