KW500LH Filter Screen Cleaning Machine

Product Overview

Working Principle & Complete Cleaning Process

Stage 1 — Vacuum Thermal Melting (RT ~ 300°C, ~150 min) Dirty screens are loaded into the vacuum furnace, where residual polymer softens under controlled heating, melts, and drips into the bottom collection container. Operating under vacuum prevents oxidation of the screens, preserving their mechanical integrity for extended service life.

Stage 2 — High-Temperature Pyrolysis (300 ~ 450°C, ~360 min) The temperature is progressively raised to pyrolyze and decompose the remaining contaminants into volatile fractions. All waste gas generated is continuously extracted and treated via a water-spray scrubber and water-ring vacuum pump, ensuring clean, environmentally compliant exhaust.

Stage 3 — Oxidation Decomposition (450°C, ~60 min) A trace amount of air is introduced under partial vacuum, fully oxidizing and burning off carbonized residues — restoring the screen mesh to a bare-metal, contaminant-free state.

Stage 4 — High-Pressure Water Rinsing Screens are removed from the furnace and rinsed with high-pressure water, flushing away loose ash and residual debris from the mesh openings.

Stage 5 — Ultrasonic Fine Cleaning (30–60 min) Final deep cleaning in an ultrasonic tank removes microscopic particles from every mesh gap, delivering a metallic-clean surface ready for immediate reuse — with no chemical solvents, no screen damage, and minimal metal loss.

Main Unit Composition

Key Features

✅ High-efficiency vacuum thermal decomposition Controlled vacuum-heating process melts and decomposes plastic contaminants without damaging metal filter mesh structure. Avoids over-oxidation or deformation of filter screens.

✅ Two-stage cleaning workflow: thermal pyrolysis + ultrasonic finishing Heavy carbon-plastic dirt is eliminated by vacuum thermal furnace; ultrasonic treatment removes tiny residual particles, delivering near-new cleaning result.

✅ Wide compatibility for filter specifications Suitable for filter screens ranging from 8 mesh to 150 mesh, compatible with filter discs for various screen changers in plastic extrusion & recycling plants.

✅ Precise temperature control Temperature control accuracy reaches ±1 ℃; working temperature adjustable up to 500 ℃, max design temperature 650 ℃. Supports custom temperature curves for different contamination levels.

✅ Safe & environmental-friendly exhaust treatment Process waste gas passes through water-spray scrubber system before discharge; prevents harmful fume pollution on-site.

✅ Reduce operational cost Recycle and regenerate blocked filter screens instead of frequent replacement. Greatly lowers consumable expenditure for plastic recycling and pelletizing workshops.

✅ Fully-automatic process option Pre-set heating & holding time parameters; equipment executes cleaning cycle automatically. Simple operation for workshop staff.

Technical Parameters

Vacuum Thermal Cleaning Furnace

Ultrasonic Cleaning Unit

Application Fields

• Plastic recycling & pelletizing plants
• Extrusion production lines equipped with hydraulic / back-flush screen changers
• Factories consuming large-volume filter discs and filter meshes
• Post-consumer HDPE / PP rigid plastic recycling lines

Before-and-after reference: Carbon-caked dirty filter discs can be restored to clean metallic condition after full KW500LH treatment for repeated service.