Plastic Dewatering Equipment

Product Overview

Plastic dewatering equipment is a screw-extrusion type plastic squeezing machine, specifically designed to handle wet plastic materials after washing. It removes free water from the material through purely physical extrusion, reducing moisture content to below 5%. This equipment efficiently connects the plastic washing line with subsequent pelletizing processes, providing a stable pre‑dewatering stage for recycled plastic processing. As a custom‑made product, it has no fixed price and is tailored to meet each customer’s production capacity requirements, adapting to various scales of plastic recycling operations.

Technical Principle

This equipment employs a screw‑extrusion dewatering principle. After washing, wet plastic materials are fed into the extruder chamber via a dedicated conveying system. Under the continuous pushing and compressive action of variable‑pitch screw flights, the material volume is steadily reduced, while free water inside is forced out through stainless steel screens on the chamber walls and discharged. The entire process relies entirely on physical dewatering, without any additional heating. From the feed end to the discharge end, the material undergoes progressive pressurized dewatering, ultimately yielding dry material with low moisture content that can be directly sent to the next pelletizing step without further treatment.

Performance Parameters

1. Processing Capacity: 500–2000 kg/h
2. Moisture Content After Dewatering: ≤5%
3. Overall Dewatering Rate: Up to 75% or more
4. Screen Material: Wear‑resistant stainless steel
5. Production Mode: Supports continuous operation
6. Screw and Barrel Material: 38CrMoAlA alloy, bimetallic construction, nitrogen‑treated
7. Motor Brand: Siemens, ABB, Weg, or leading domestic brands
8. Bearing Brand: NSK, SKF, INA, FAG, or top domestic brands
9. Inverter Brand: ABB, FUJI, Delta, Siemens
10. Delivery Time: 70–80 working days
11. Warranty Period: 13 months from the bill of lading date
12. Trademark & Brand: PURUI
13. Country of Origin: NANTONG

Core Advantages

1. Low Energy Consumption: Utilizing purely physical extrusion dewatering without any heating, this equipment boasts extremely low operating costs. Compared to traditional hot‑air drying, it saves over 70% in energy, allowing a single production line to cut annual energy expenses by more than RMB 80,000.
2. High Dewatering Efficiency: With an efficiency exceeding 75%, it can reduce moisture content from above 20% down to under 5%, ensuring materials meet the stringent requirements of downstream pelletizing processes.
3. Durability and Low Maintenance Costs: The screw is made of wear‑resistant material and treated with nitriding; the screen is crafted from durable stainless steel, resulting in long service life. Its simple structure, ease of operation, and low failure rate significantly reduce maintenance expenses.
4. Seamless Integration with Flow‑Line Production: Directly connected to the output of the washing line, it enables continuous operation, perfectly linking the washing line with subsequent pelletizing steps and boosting overall production efficiency.
5. Space‑Saving Design: Occupying only one‑third of the footprint required by conventional drying lines, it greatly conserves plant space, making it ideal for facilities with limited room.

Core Value of the Product

1. Substantial Reduction in Energy Costs: Saving over 70% compared to hot‑air drying, with annual energy savings exceeding RMB 80,000 per line—accumulating significant cost advantages over time.
2. Enhanced Product Quality: By stabilizing moisture content at 5% or lower, it effectively eliminates issues like bubbling and breakage during direct pelletizing, reducing defective rates in downstream processes by 80% and cutting screen‑changing frequency by 60%, thus improving the consistency and quality of finished pellets.
3. Streamlined Production Workflow: Seamlessly integrating the washing line with pelletizing, continuous operation boosts overall processing efficiency while saving valuable plant space and optimizing layout.
4. Customizable Adaptation: Tailored to meet specific production needs, it accommodates varying capacities of plastic recycling enterprises.

Target Customer Groups

Plastic washing plants, recycled pellet manufacturers, plastic recycling companies, renewable resource industrial parks, and solid waste treatment facilities—all face substantial demand for dewatering washed plastic materials. The equipment’s high efficiency and low energy consumption make it an ideal fit for their operational needs.

Application Scenarios

This equipment is primarily used for dewatering PE/PP film after washing, squeezing woven bags after cleaning, and pre‑treating washed recycled plastic films and woven bags. It provides low‑moisture, qualified raw material for subsequent pelletizing, ensuring smooth production flows and consistent product quality.

Solutions to Industry Pain Points

1. Addressing High Defective Rates in Pelletizing: High moisture levels often cause bubbling and breakage during direct pelletizing, leading to elevated defect rates. This equipment reduces moisture content to below 5%, cutting defective rates in downstream processes by 80% and significantly improving finished product quality.
2. Replacing Energy‑Intensive Drying Processes: Hot‑air drying consumes large amounts of energy, incurs high costs, and offers poor dewatering efficiency. This equipment uses purely physical extrusion dewatering, eliminating heating needs and saving over 70% in energy, dramatically lowering operating expenses.
3. Avoiding the Drawbacks of Natural Air‑Drying: Traditional air‑drying requires extensive space, suffers from low efficiency, and is heavily influenced by weather conditions. This equipment occupies only one‑third of the area needed for conventional drying lines, enabling continuous operation unaffected by weather and delivering superior dewatering performance.
4. Ensuring Stable Downstream Production: Incomplete dewatering can lead to unstable downstream processes and inferior product quality. The equipment’s reliable dewatering ensures materials meet required moisture standards, providing a stable feedstock for pelletizing and enhancing final product quality.

Frequently Asked Questions (FAQ)

Q1: How effective is this plastic dewatering equipment?
A: It can reduce moisture content from over 20% down to below 5%, with an overall dewatering rate exceeding 75%, fully meeting the raw material requirements of downstream pelletizing processes.
Q2: Is the operating cost high?
A: Using purely physical extrusion dewatering without heating, it saves over 70% in energy compared to hot‑air drying, cutting annual energy expenses by more than RMB 80,000 per line and keeping operating costs extremely low.
Q3: Does the equipment support customization?
A: As a custom‑made product, it has no fixed price and is tailored according to each customer’s production capacity, adapting to different scale scenarios.
Q4: What is the warranty period?
A: The warranty lasts 13 months from the bill of lading date, during which customers enjoy corresponding after‑sales service support.
Q5: Can the equipment integrate with existing production lines?
A: It can connect directly to the output of washing lines, enabling continuous flow‑line production and seamlessly linking existing plastic washing lines with downstream pelletizing processes, without requiring major adjustments to current layouts.