Centrifugal Dryer Dewatering Machine

Centrifugal Dryer Dewatering Machine

Rumtoo High-Efficiency Centrifugal Dryer: The Ideal Choice for Plastics Recycling Pre-Drying

Introducing the Rumtoo Centrifugal Dryer – a highly effective, low-energy drying solution engineered specifically for the plastics recycling industry. It utilizes powerful centrifugal force to significantly remove surface moisture from washed plastics (like PE film, PET flakes), making it an indispensable component in modern plastic washing and recycling lines.

Working Principle: Combining Centrifugal Force & Friction Cleaning

Rumtoo’s horizontal centrifugal dryer operates similarly to a high-speed friction washer. At its core, a robust central shaft equipped with multiple wear-resistant paddles spins at high speed (typically over 1000 RPM) inside a precision-engineered mesh screen tunnel. The entire rotating assembly is housed within a sturdy metal enclosure and driven by an efficient external electric motor.

As wet plastic flakes or film enter the machine via the inlet, the rapid rotation of the shaft generates intense centrifugal force. This force throws the plastic material against the inner wall of the mesh screen. Water attached to the plastic surface is effectively separated by this force, passing through the screen openings and collecting at the bottom of the unit for discharge, facilitating easy water recovery or disposal.

After processing through the centrifugal dryer, the moisture content of the plastic is significantly reduced from high levels (post-washing) down to approximately **20%-30%**. This pre-drying step creates an optimal condition for subsequent thermal drying processes (e.g., hot air drying systems), drastically reducing the energy consumption and time required for final drying. Notably, the high-speed paddles also provide a degree of friction cleaning as they tumble the material, helping to further remove contaminants and cool the plastic, achieving the dual benefits of dewatering and enhanced cleaning.

Key Technical Specifications

We offer various models to suit different production capacities:

Model Motor Power (kW) Main Shaft Dia. (mm) Rotating Speed (RPM) Capacity (KG/H) RTMCD400 37 400 1400 400–800 RTMCD550 45 550 1200 600–1000 RTMCD750 55 750 1080 1200–2000

Equipment Photos & Details

Rumtoo centrifugal dryer processing plastic flakes

Machine in operation

Internal structure of Rumtoo centrifugal dryer: rotating paddles and mesh screen

Internal Structure: Paddles & Screen

Inquire Now to Enhance Your Recycling Efficiency

Interested in the Rumtoo Centrifugal Dryer? Want to learn how it can integrate into your existing or new recycling line? Contact us via the form below for the latest pricing, lead times, and expert technical consultation.

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PP PE Film Washing System: Boost Recycling Profits & Efficiency

PP PE Film Washing System: Boost Recycling Profits & Efficiency

The global push towards sustainability and a circular economy has put plastic recycling firmly in the spotlight. Polypropylene (PP) and Polyethylene (PE) films – commonly used in packaging, agriculture, and industry – represent a significant portion of plastic waste. However, efficiently and profitably recycling these materials presents challenges due to contamination. This is where a high-performance PP PE Film Washing System becomes an indispensable asset.

For plant managers, engineers, and procurement specialists in the recycling industry, understanding the capabilities and benefits of these systems is crucial for maximizing operational efficiency and boosting profitability. This article provides a comprehensive overview of PP PE film washing lines, their workflow, benefits, and key considerations for selection.

Why Focus on Recycling PP/PE Film?

PP and PE films are ubiquitous but often heavily contaminated with dirt, sand, oil, food residue, labels, and moisture. Landfilling this valuable resource is not sustainable. Recycling PP/PE film:

  1. Conserves Resources: Reduces reliance on virgin petrochemicals.
  2. Reduces Landfill Burden: Diverts bulky waste from landfills.
  3. Creates Economic Value: Cleaned film flakes can be pelletized and reused in manufacturing new products.
  4. Meets Regulatory Demands: Increasingly stringent environmental regulations mandate higher recycling rates.

However, the quality of the recycled output directly impacts its market value. Contaminated flakes lead to poor-quality pellets, limiting their applications and depressing prices.

The Challenge: Contamination in PP/PE Film Scrap

Raw PP/PE film waste streams are notoriously difficult:

  • High Contamination: Soil, sand, rocks from agricultural film; food waste, oils, labels from post-consumer packaging.
  • High Moisture Content: Especially in washed or outdoor-stored materials.
  • Mixing: Different types of plastics, paper, and non-plastic items mixed in.
  • Bulky & Light: Difficult to handle and transport efficiently.

An effective washing system is designed specifically to tackle these challenges head-on.

What is a PP PE Film Washing System?

A PP PE Film Washing System (or Plastic Film Washing Line) is a series of interconnected machines designed to take dirty, baled, or loose PP/PE film scrap and transform it into clean, dry flakes suitable for high-quality pelletizing. The system employs mechanical friction, water washing, density separation, and drying techniques to systematically remove contaminants.

Anatomy of a Modern PP PE Film Washing Line: The Workflow

While specific configurations vary based on input material contamination and desired output quality, a typical high-efficiency system includes the following stages:

(Imagine a flowchart/diagram here illustrating the flow below)

  1. Debaling & Shredding:
    • Function: Breaks open compressed bales and reduces the large film pieces into smaller, more manageable sizes (typically < 100mm).
    • Equipment: Bale Breaker, Single-Shaft or Double-Shaft Shredder.
    • Why: Increases surface area for effective cleaning and ensures consistent material flow.
  2. Initial Rinse / Pre-Washing (Optional but Recommended):
    • Function: A preliminary wash to remove loose dirt, sand, and small stones.
    • Equipment: Trommel Screen, Wet Crusher, or dedicated Pre-Washing Drum.
    • Why: Reduces the load on subsequent, more intensive washing stages, improving overall efficiency and reducing wear.
  3. Sink-Float Separation Tank:
    • Function: Separates materials based on density. PP/PE films (density < 1 g/cm³) float, while heavier contaminants (dirt, sand, PET, PVC, metals) sink.
    • Equipment: Large water tank with rotating paddles or conveyor systems to skim floating materials and remove sinking contaminants.
    • Why: Crucial for removing heavy contamination and separating different plastic types if mixed.
  4. High-Speed Friction Washer:
    • Function: Intensive scrubbing action using high rotational speed and water jets to dislodge stubborn dirt, paper pulp, and residues attached to the film surface.
    • Equipment: Horizontal or vertical cylinder with rapidly rotating paddles/blades.
    • Why: The core cleaning stage for surface contaminants. Multiple units may be used in series for heavily soiled material.
  5. Rinsing Tank(s):
    • Function: Rinses away detergents (if used) and any remaining loosened contaminants after friction washing. Often incorporates another sink-float step.
    • Equipment: Similar to the initial sink-float tank, ensuring clean water is used for the final rinse.
    • Why: Ensures maximum cleanliness and prepares the material for dewatering.
  6. Dewatering:
    • Function: Mechanically removes the bulk of the water from the cleaned film flakes.
    • Equipment: Screw Press (Squeezer) or Centrifugal Dryer (Horizontal/Vertical).
    • Why: Significantly reduces moisture content, which is critical for energy-efficient drying and effective pelletizing. Screw presses can typically achieve lower moisture levels (<5%) compared to centrifuges alone.
  7. Thermal Drying System:
    • Function: Uses hot air to evaporate the remaining surface moisture down to required levels (often <1% – 3%).
    • Equipment: Hot air pipeline drying system connected to the dewatering machine outlet.
    • Why: Ensures flakes are adequately dry for immediate, high-quality pelletizing without issues like foaming or degradation.
  8. Material Collection & Storage:
    • Function: Collects the clean, dry flakes.
    • Equipment: Cyclone separator and storage silo.
    • Why: Prepares the material for the next stage (usually pelletizing) or for sale as clean flakes.

Boosting Profits & Efficiency: The Benefits of a Quality System

Investing in a well-designed PP PE film washing system translates directly to bottom-line improvements:

  • Higher Output Purity: Effectively removing contaminants leads to cleaner flakes (>98-99% purity). This commands higher prices in the market as it produces better quality pellets.
  • Increased Pellet Quality: Clean flakes mean fewer impurities during extrusion, resulting in stronger, more consistent pellets with better mechanical properties and fewer defects (e.g., voids, black specks).
  • Improved Operational Efficiency: Automated systems reduce manual labor requirements for sorting and cleaning. Optimized workflow minimizes bottlenecks and maximizes throughput (kg/hour).
  • Reduced Water Consumption: Modern systems often incorporate water circulation and filtration systems, significantly reducing freshwater intake and wastewater discharge costs.
  • Lower Maintenance & Downtime: Robust construction and quality components lead to less frequent breakdowns and easier maintenance.
  • Versatility: Ability to process different types of film (e.g., agricultural, packaging, industrial) and varying levels of contamination.
  • Environmental Compliance: Meeting regulations regarding waste processing and recycled content becomes easier.

Performance Comparison: Basic vs. Advanced Washing Line

FeatureBasic/Older SystemAdvanced/Modern SystemImpactOutput PurityLower (<95%)Higher (>98%, often >99%)Higher flake/pellet value, wider applicationsMoisture ContentHigher (5-10%+)Lower (<3%, often <1% with squeezer)Better pelletizing, energy savingsThroughputLowerHigher (Optimized flow)Increased production capacityWater UsageHighLower (Recirculation & Filtration)Reduced operating costs, environmentalLabor RequiredHigher (More manual handling)Lower (Higher automation)Reduced labor costsContaminant RemovalLess effective on tough dirtHighly effective (Multi-stage)Better product quality, fewer rejects

Key Considerations When Selecting a PP PE Film Washing System

For engineers and technical personnel evaluating options, consider these factors:

  1. Input Material: What type of film (LDPE, LLDPE, HDPE, PP)? What are the typical contamination levels and types (sand, oil, paper)?
  2. Capacity Requirements: What is your target throughput (kg/hour or tonnes/day)? Ensure the system is sized appropriately, allowing for potential future growth.
  3. Output Quality Requirements: What is the target purity and moisture content? This dictates the necessary stages and intensity of the washing line.
  4. Automation Level: Balance initial investment cost with long-term labor savings.
  5. Water Treatment: Does the system include effective water filtration and recirculation? What are the local wastewater discharge regulations?
  6. Energy Consumption: Evaluate the power requirements of motors, heaters, etc. Look for energy-efficient designs.
  7. Space & Utilities: Ensure you have adequate factory space, power supply, and water access.
  8. Supplier Reputation & Support: Choose a reputable manufacturer with proven installations, good technical support, and readily available spare parts.

Conclusion: An Investment in Quality and Profitability

A high-quality PP PE Film Washing System is more than just cleaning equipment; it’s a strategic investment in the profitability and sustainability of your recycling operation. By effectively removing contaminants and delivering clean, dry flakes, these systems unlock the true value of PP/PE film waste. This leads to higher-quality end products, better market prices, improved operational efficiency, and a stronger competitive position in the growing recycling industry.

When evaluating options, focus on the system’s ability to handle your specific input material, meet your output quality targets, and integrate efficiently into your overall workflow. Partnering with an experienced supplier who understands the nuances of film recycling is key to selecting the right system and maximizing your return on investment.

Ready to turn challenging PP/PE film waste into a high-value resource? Explore tailored washing line solutions designed for maximum efficiency and profitability.

Plastic Recycling Washing Line for PE Film and Fabrics

Plastic Recycling Washing Line for PE Film and Fabrics
Plastic Film

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Non-woven Bag

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Artificial Grass

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BOPP Film

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Understand the recycling process of BOPP films.

Mulch Plastic Film

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Woven Bag

Woven Bag

Learn about the durability and recyclability of woven bags.

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Key Components

Screw Feeder Specifications

The Screw Feeder is designed for durability and efficiency in material handling processes.

  • Material: 304 stainless steel
  • Shell & Blade Thickness: 3mm
  • Screen Hole Thickness: 2mm
  • Spiral Diameter: Customized based on output size

Primary Functions:

  • Conveying materials
  • Filtering water
  • Cleaning surface sediment from materials
Screw Feeder

 

Single-shaft Shredder Specifications

The Single-shaft Shredder is engineered for efficient shredding and size reduction of a variety of materials, including plastics, wood, and general industrial waste.

  • Rotor Speed: 60-100 RPM
  • Blade Material: High-strength alloy steel or D2 steel
  • Cutting Chamber: 400mm x 500mm to 2000mm x 2000mm (varies by model)
  • Screen Filter Size: 40mm – 100mm (customizable)
  • Motor Power: 15-200 kW

Primary Functions:

  • Shredding diverse waste materials
  • Pre-conditioning materials for recycling
  • Minimizing material size for easy handling
  • Reducing dust buildup and improving operational cleanliness
  • Enhancing blade durability and overall machine longevity
Single-shaft Shredder

Wet Plastic Granulator Specifications

The Wet Plastic Granulator is an upgraded version of our general-purpose granulators, designed for efficient cutting and pre-cleaning of plastic bottles, films, and rigid materials.

  • Rotor Speed: 400-600 RPM
  • Blade Material: D2 high-carbon, high-chromium steel
  • Cutting Arrangements: V-shape or double-scissor cut
  • Screen Filter Size: 10mm – 100mm (customizable)

Primary Functions:

  • Cutting plastic materials
  • Pre-cleaning and loosening contaminants
  • Reducing dust buildup in recycling plants
  • Extending blade and machine durability
Wet Plastic Granulator

Friction Washer Specifications

The Friction Washer is designed for efficient cleaning and transportation of plastic flakes, films, and regrind materials.

  • Rotor Speed: 500-600 RPM
  • Water System: Top inlet, bottom outlet
  • Operation: Continuous
  • Cleaning Method: Friction-based

Primary Functions:

  • Cleaning plastic materials
  • Transporting materials between machinery
  • Removing soil, sand, and other contaminants
Friction Washer

Floating Separation Tank Specifications

Our Floating Separation Tank is designed to efficiently segregate PP and PE plastics from co-mingled streams while simultaneously cleaning the materials for further processing.

  • Interior Width: 1000mm – 1800mm
  • Total Length: 4 – 7 meters
  • Interior Material: Type 304 Stainless Steel
  • Exterior Frame: Carbon Steel
  • Paddle Motors: 1.5KW*2 (frequency control)

Key Features:

  • “W” shaped bottom for improved efficiency
  • Dual-section design for better contamination management
  • Water-based separation for PP and PE plastics
  • Simultaneous cleaning and separation
Sink-Float Separation Tank

Hot Washer Specifications

The Hot Washer is specifically designed for cleaning plastic films and fabrics with oil stains, adhesives, and other persistent contaminants. It features an integrated heating system, eliminating the need for an external steam generator, and ensures effective cleaning with optimized chemical agents.

  • Operation Mode: Continuous or batch mode (customizable)
  • Heating System: Built-in electric heating
  • Washing Method: Hot water bath with chemical additives
  • Suitable Materials: PE films, woven fabrics, and other contaminated plastics

Key Features:

  • Effective removal of oil stains, adhesives, and stubborn contaminants
  • Integrated heating system, eliminating the need for an external steam generator
  • Optimized use of chemical agents for enhanced cleaning
  • Flexible operation modes to suit different processing requirements
  • Durable construction for continuous, heavy-duty operation
Hot Washer

Centrifugal Dryer Dewatering Specifications

Our Centrifugal Dryer Dewatering machine is a highly efficient, low energy consuming equipment designed to partially remove water from plastic materials using centrifugal force. It’s an essential first step in PE film and PET bottle washing lines.

  • Rotation Speed: Approximately 1,000 RPM
  • Moisture Reduction: To approximately 20-30%
  • Main Components: Long shaft with paddles, mesh screen tunnel
  • Casing: Metal container with external electric motor

Key Features:

  • High efficiency with low energy consumption
  • Handles material with high water content
  • Suitable for PET flakes, PP/PE Film, and other plastic regrinds
  • Patented design doubles as a friction washer for cooling and cleaning
  • Water recycling capability
Centrifugal Dryer Dewatering

Pipe Dryer Specifications

Our Pipe Dryer is designed for efficient moisture removal through dehydration, ideal for plastic film and PET washing line. It’s an essential final step in reducing moisture levels to below 3%.

  • Model: RSJ800
  • Blower Power: 5.5 KW
  • Heating Power: 36 KW
  • Pipe Diameter: ⌀159mm
  • Pipe Material: Type 304 Stainless Steel

Key Features:

  • Continuous drying process
  • Integrated cyclone separator
  • Hot air dehydration system
  • Efficient dust and fines removal
  • Scalable design (can use multiple units in series)
Thermal Dryer

Film Squeezer Specifications

The Film Squeezer, also known as the Squeezer Drying Machine, is engineered for efficient dewatering and compressing of washed plastic films, including polyethylene (PE) and polypropylene (PP). This machine is essential in recycling lines, significantly reducing moisture content and material volume to enhance downstream processing.

  • Moisture Reduction: Lowers moisture content from 10-35% down to 1-5%
  • Squeezing Mechanism: Screw-type compression system
  • Output Capacity: 300 kg/h – 1500 kg/h (varies by model)
  • Energy Consumption: 75 kW – 162 kW

Primary Functions:

  • Efficiently reduces moisture content, preparing materials for extrusion-pelletizing
  • Compresses film flakes into solid lumps for higher density and stability in extrusion
  • Enhances overall recycling efficiency by delivering drier and denser materials
  • Durable construction ensures longevity and reliable performance under heavy-duty operation
Plastic Film Squeezer

Benefits of Our Technology

🌱

Eco-Friendly

Reduced water and energy consumption, minimizing environmental impact.

High Output Quality

Superior cleaning for high-grade recycled materials, ensuring premium results.

🔄

Versatile

Capable of processing various rigid plastic types, offering unmatched flexibility.

Contact Us

Ready to upgrade your plastic recycling capabilities? Contact our team of experts today for a customized solution.

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Single-Shaft Shredder

Single-Shaft Shredder

Introduction to the Component Composition and Working Principle of a Single-Axis Shredder

Single-Shaft Shredder is a mechanical equipment mainly used for crushing, processing, and recycling of waste materials. Its main components include the following parts:

  1. Shaft: The shaft is the core component of the single-shaft shredder, which drives the blades to crush the materials. The shaft is usually made of high-strength steel and can withstand high-load working environments.
  2. Blades: The blades are important parts on the shaft, used to shear, tear, cut, and grind materials. The blades are usually made of high-hardness and high-wear-resistant alloy steel to ensure good crushing effect and long service life.
  3. Feed Hopper: The feed hopper is an important part of the single-shaft shredder, used to feed waste materials into the machine. The size and shape of the feed hopper are usually designed and optimized according to the material characteristics and processing requirements.
  4. Discharge Outlet: The discharge outlet is an important part of the single-shaft shredder, used to discharge shredded particles from the machine. The design of the discharge outlet is usually based on material characteristics and processing requirements.
  5. Drive System: The drive system is an important part of the single-shaft shredder, used to transmit the power of the electric motor to the shaft and blades. The drive system usually consists of a motor, reducer, coupling, and other components.

The working principle of the single-shaft shredder is that waste materials enter the machine through the feed hopper, are cut into small pieces by the blades, and are continuously pushed forward until they are shredded into small particles and discharged from the discharge outlet. During the entire crushing process, the high-speed rotation of the blades causes various forces such as friction, shearing, and tearing of the materials, thereby effectively crushing and processing waste materials.

Single-Shaft vs Double-Shaft Plastic Shredders

Single-Shaft Shredders and double-shaft shredders are both used for shredding plastic materials. However, single-shaft shredders are designed for processing softer and less dense materials, while double-shaft shredders are better suited for harder and denser materials. Single-shaft shredders are also generally more cost-effective and require less maintenance compared to double-shaft shredders. However, double-shaft shredders typically offer higher throughput rates and produce more uniform output. Ultimately, the choice between single-shaft and double-shaft shredders depends on the specific needs of the industry and the materials being processed.

Feature

ModelDS-600DS-800DS-1000DS-1200 Capacity(kg/h)30kW45kW2*37kW2*45kW Hydraulic motor power4kW4kW5.5kW5.5kW Knife materialSKD11SKD11SKD11SKD11 Main motor powerΦ400Φ400Φ450Φ500 Rotary diameter(mm)85858070 Rotating speed(rpm/min)400-600600-800800-12001500-2000

Single-shaft shredders are better suited for handling solid, thick pieces such as plastic purging, runners, pallets, and even wood, branches, and bones. Double-shaft shredders use shear blades to cut the plastic material and are better suited for handling bulk volumes of hollow, lightweight plastics such as PE films, PP tubes, HDPE drums, and even rubber tires, automotive parts, and electronic waste.

Introduction

Single Shaft Shredder machines are used for the reduction of size of different materials. They are designed to process various materials ranging from plastics, rubber, wood, paper, and other waste materials. The machines are used in industries to process waste materials to reduce them to a manageable size.

High-Quality Output

The Single Shaft Shredder is designed to produce high-quality output. The machine is equipped with a rotor that is fixed with blades. The rotor rotates at a high speed, which ensures the materials are shredded into small pieces. The shredder ensures the materials are cut into small pieces that are easy to handle and transport. The machine produces uniform output, which is suitable for recycling processes.

Low Maintenance Cost

The Single Shaft Shredder is designed for low maintenance cost. The machine is equipped with a sturdy frame that provides support for the rotor and the blades. The blades are made from high-quality materials that can withstand the pressure that comes with shredding materials. The machine requires minimal maintenance, which makes it a cost-effective option for industries.

High Efficiency

The Single Shaft Shredder is designed for high efficiency. The machine is equipped with a powerful motor that provides the necessary power to the rotor. The motor is designed to operate at high speeds, which ensures the materials are shredded into small pieces. The machine is designed to handle large volumes of materials, which makes it suitable for industries that require high throughput.

Conclusion

Single Shaft Shredder machines are essential in industries that process waste materials. The machines are designed to produce high-quality output, require minimal maintenance, and operate efficiently. The machines are available in different sizes and designs, which makes it easy for industries to choose the machine that suits their needs. If you are in the market for a shredder machine, consider the Single Shaft Shredder.

Adapt the screen to your needs. The smaller the hole diameter, the finer the shredded material that is discharged. Screens can be exchanged flexibly and are bolted as standard.


Perfect cutting gap thanks to adjustable counter knives

Warranty

All recycling machines come with a 1 year limited warranty.

INQUIRIES

To get the latest prices and lead times, send us a message using the form below.

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