Waste Snake-Skin Bag Washing Line

Product Overview

The waste snake-skin bag washing line is an integrated recycling and washing system specially designed for PP woven bags and ton bags. It combines multiple processes—including crushing, deinking, sand removal, and washing—to thoroughly strip away surface contaminants such as ink, cement clumps, and label residues, ultimately producing clean shredded material that can seamlessly connect to subsequent pelletizing operations. The equipment can be customized according to customer production requirements, and a hot-washing module is available for bags with varying degrees of soiling, meeting the needs of both lightly soiled and heavily contaminated materials. It serves as a core auxiliary device in the field of recycled plastic processing.

Technical Principle and Process Flow

In response to the characteristics of woven bags—high ink content, significant sand contamination, and laminated surfaces—the washing line employs a comprehensive process of “shredding + intensive friction deinking + flotation separation + multi-stage rinsing + dewatering.” Each step works in close coordination to achieve efficient washing:

1. Whole-Bag Shredding: Bundles or individual woven bags and ton bags are fed by a feeder into a twin-shaft shredder, where they are coarsely shredded into 5–10 cm pieces. This not only breaks down the woven structure but also releases heavy impurities such as embedded sand, cement clumps, and other dense contaminants, laying the groundwork for subsequent washing stages.

2. Intensive Friction Deinking and Washing: The shredded material enters a horizontal high-speed friction washer, where rapidly rotating wear-resistant blades cause intense collisions and self-friction between particles. Combined with either ambient-temperature or heated wash water, this process powerfully removes surface printing ink, residual cement, and laminating adhesive layers. Detached ink and fine sand are discharged through a screen along with wastewater; for heavily inked or laminated materials, an optional 80–95°C hot-washing module can be added, using eco-friendly detergents for deep treatment and further enhancing washing performance.

3. Flotation Separation and Impurity Removal: After friction washing, the material flows into a flotation rinse tank. Leveraging differences in density between materials and impurities, lightweight contaminants such as paper labels, plastic laminates, and light debris float to the surface and are discharged via overflow outlets, while heavier sand and metal fragments settle at the bottom and can be periodically removed. Within the tank, a screw conveyor performs preliminary rinsing, further eliminating surface residue.

4. Secondary Clean Water Rinsing: Following flotation separation, the material moves to a secondary clean-water tank, where it undergoes additional rinsing in flowing water to remove residual washing agents and fine particulates, effectively improving cleanliness and ensuring the quality of pellets produced later.

5. Spiral Dewatering: The cleaned material is then fed into a spiral dewatering machine, where physical squeezing removes excess moisture. Simultaneously, the machine’s wear-resistant stainless-steel mesh filters out remaining fine residues, yielding dry material with extremely low moisture content that can be directly sent to pelletizing equipment for processing.

6. Water Recycling System: The equipment is equipped with a three-stage sedimentation and filtration system. Wastewater generated during washing is settled and filtered before being reused, significantly reducing water consumption and aligning with environmentally friendly production standards.

Key Performance Parameters

1. Processing Capacity: 600–1,800 kg/h, with customizable specifications tailored to actual customer production needs.
2. Ink Removal Rate: ≥92%, effectively stripping surface printing ink from woven bags and preventing blackened recycled pellets.
3. Sand Removal Rate: ≥95%, completely eliminating embedded sand, cement clumps, and other heavy impurities.
4. Moisture Content After Dewatering: ≤4%; low-moisture material can be directly fed into pelletizing without additional drying.
5. Water Recycling Rate: Over 85%, substantially reducing water usage throughout the production process.

Core Product Advantages

1. Outstanding Deinking and Sand Removal Performance: Utilizing high-speed, wear-resistant blades to create self-friction during washing, this system efficiently removes ink, cement residue, and sand even from heavily soiled woven bags, addressing the shortcomings of conventional washing equipment.
2. Flexible Customization: A hot-washing unit can be tailored to meet diverse needs, handling both lightly soiled bags and those with severe ink and laminating adhesive issues, adapting to various recycling scenarios.
3. Long Lifespan of Wear Parts and Low Maintenance Costs: Key wear components are made from wear-resistant alloys, doubling their service life compared to standard parts, while procurement costs drop by 45%, significantly lowering long-term operating expenses.
4. Simultaneous Removal of Light and Heavy Impurities: Through the density-based separation principle of the flotation rinse tank, both light and heavy contaminants are removed in one step, eliminating the need for additional separate impurity-removal equipment, streamlining the process and boosting efficiency.
5. Water Recycling System Saves Water and Protects the Environment: The accompanying three-stage sedimentation and filtration system enables reuse of wash water, cutting water consumption per ton by 75%—reducing production costs while complying with environmental regulations.
6. Seamless Integration with Subsequent Pelletizing Lines: With final dry material containing ≤4% moisture, it can be directly fed into pelletizing equipment without extra drying, achieving seamless integration between washing and pelletizing and enhancing overall production efficiency.

Core Product Value

1. Efficient washing Enhances Recycled Pellet Quality: With a combined ink and sand removal rate exceeding 93%, it effectively prevents blackening and quality defects in recycled pellets, thereby increasing their market value.
2. Reduces Losses in Pelletizing Operations: Thoroughly cleaned material significantly decreases clogging frequency in pelletizing equipment, cutting net-changing cycles by 70% and minimizing downtime, thus improving overall pelletizing line efficiency.
3. Drastically Lowers Operating Costs: Alloy wear-resistant blades extend the lifespan of consumable parts, the water-recycling system reduces water usage, and each line requires only 2–3 operators, slashing labor costs by 60% and lowering overall production expenses from multiple angles.
4. Supports Sustainable Development Through Environmental Compliance: High water-recycling rates meet environmental standards, helping companies achieve green production, comply with regulations on recycled resource processing, and enhance their corporate social image.

Target Customer Base

The primary target customers include various woven-bag recycling enterprises, cement and grain packaging plants (handling discarded packaging), recycling centers, and large-scale PP pellet factories—all of which have substantial demand for processing waste woven bags and require efficient, environmentally friendly washing equipment to boost recycling efficiency and improve the quality of recycled products.

Application Scenarios

The waste snake-skin bag washing line is suitable for pre-treating all types of dirty woven waste, including cement-woven bags, laminated ton bags, grain-woven bags, bulk space bags, and snake-skin mesh bags. Whether it’s construction-site waste woven bags laden with cement clumps or industrial ton bags coated with laminates and heavily inked, this equipment delivers efficient washing, providing high-quality raw materials for subsequent pelletizing operations.

Industry Pain Points Addressed

1. Solves the Problem of Severe Sand Contamination Causing Screw Wear: By thoroughly removing sand, cement clumps, and other heavy impurities through shredding and flotation separation, the equipment prevents hard contaminants from entering pelletizing machinery and damaging screws, extending the service life of pelletizing equipment.
2. Addresses Blackening and Quality Defects Caused by Residual Ink: With an ink removal rate of ≥92%, the equipment effectively strips surface printing ink from woven bags, ensuring uniform color and qualified quality in recycled pellets, thereby enhancing product competitiveness.
3. Tackles Frequent Clogging and Low Efficiency in Pelletizing Due to Dirty Material: Thoroughly cleaned material reduces impurity blockages in pelletizing molds, cutting mold-change frequency by 70% and significantly decreasing production downtime, thus improving continuous operation capability of pelletizing lines.
4. Alleviates Issues of Labor-Intensive Manual washing and Unassured Cleanliness: The automated, integrated washing line requires only 2–3 operators, delivering several times higher efficiency than manual washing, with stable results and cleanliness meeting pelletizing production standards, while the water-recycling system dramatically cuts water consumption.

Common Questions FAQ

Q1: What is the processing capacity range of this waste snake-skin bag washing line?
A: The standard processing capacity is 600–1,800 kg/h, but the equipment can be customized to suit specific customer production needs, accommodating businesses of various scales.
Q2: Can the equipment effectively clean woven bags with heavy ink and laminates?
A: Yes. An optional 80–95°C hot-washing module can be added, using eco-friendly detergents for deep treatment, effectively removing heavy ink and laminating adhesive layers and ensuring compliance with cleanliness standards.
Q3: How much water can the equipment’s water-recycling system save?
A: The wash-water recycling rate can exceed 85%, reducing water consumption per ton by 75% compared to traditional direct-discharge systems, significantly cutting production water costs.
Q4: Can the material produced by the equipment be directly fed into pelletizing?
A: Yes. The spiral dewatering machine reduces moisture content to ≤4%, allowing direct feeding into pelletizing equipment without additional drying, achieving seamless integration between washing and pelletizing.
Q5: What is the lifespan of the equipment’s wear parts?
A: Key wear components are made from wear-resistant alloys, offering twice the service life of standard parts, while procurement costs drop by 45%, effectively reducing long-term maintenance expenses.