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The pulp and paper industry is a typical resource-intensive sector, generating substantial amounts of combustible pulp residue during the production process, such as fiber scraps, pulp sludge, and waste cardboard. Traditionally, these residues are mostly disposed of through landfilling or direct incineration, which not only occupies valuable land resources but also causes serious environmental pollution.WANROOE RDF Production Line Converts these waste slurries into standardized, high-calorific-value Solid Recovered Fuel (SRF/RDF) through advanced processes achieves resource conversion, transforming industrial waste into recyclable clean energy and creating an environmentally and economically win-win solution for paper enterprises.
Process flow:
1. Feedstock Preprocessing: Impurity Removal and Purification
Pulp waste may contain impurities like metal scraps, plastic films, and gravel, requiring manual sorting or mechanical screening. Equipment such as vibrating screens and magnetic separators removes non-combustible contaminants to ensure feedstock purity. This step prevents equipment damage and safeguards RDF pellet combustion performance, providing qualified raw materials for subsequent processing.
2. Dual-Shaft Shredding (Double Shredding): Homogenization & Volume Reduction
Preprocessed pulp waste enters a double shaft shredder for size reduction. Irregular shapes, uneven fiber lengths, and high moisture content make direct processing difficult. The shredder's intermeshing blades shear, tear, and compress the waste, achieving two key functions:
Volume Reduction & Compaction: Reduces loose pulp waste volume by 60%-85%, lowering transport/storage costs and saving space for downstream processes.
Homogenization: Breaks long fibers and lumpy waste into uniform 5-10mm fragments, eliminating feedstock variability to ensure stable dewatering and pelletizing, preventing product quality fluctuations.
Double shaft shredder machine link:
https://www.amshredder.com/pulper-rop...
3. Extrusion Pelletizing: Integrated Dehydration & Shaping for Premium Fuel
Pulp shreds with 60%-70% moisture content post-shredding require extrusion pelletizers – the central conversion unit – for integrated dehydration and shaping, enabling efficient combustion. This system combines compression dewatering and forced pelletizing:
Efficient Dewatering: Screw extrusion generates pressure differentials against mesh screens, squeezing moisture to 20%-30% during material transport.
Simultaneous Pelletizing: Dehydrated material is forced through die holes under screw thrust, forming cylindrical pellets with 1.1-1.3g/cm³ density. The dense, high-strength structure prevents breakage during storage/transport.
Dewatering Squeezing Pelletizing Machine link:
https://www.ampelletizer.com/paper-pu...
4. Post-Processing Curing: Enhancing Stability for Storage & Combustion
Newly formed RDF pellets, retaining residual moisture, undergo curing via air-drying or low-temperature drying (50-80°C). This reduces moisture content to below 15%, granting the pellets moisture/mold-proof properties. Cured pellets achieve 6-12 months' ambient storage stability and exhibit stable combustion with uniform calorific value, eliminating issues like incomplete burning and black smoke from wet feedstocks.
RDF pelletization technology compresses combustible waste into high-energy fuel pellets, achieving a 70% volume reduction, lowering transportation costs by 60%, ensuring stable calorific value of 4000 kcal/kg, increasing combustion efficiency to over 90%, and reducing dioxin emissions by 50%.
For much more info, please visit our website:
Wechat ID: WANROOE
Whatsapp: 0086-18962233220
Skype:"China.plastic.machine"
Email: [email protected]
Website:
https://www.wanrooerecycle.com/
https://www.amshredder.com/
https://www.wanrooetech-pulverizer.com/
https://www.wanrooe.com/
https://www.ampelletizer.com/
https://www.wanrooetech.com/
https://www.timesrecycle.com/
https://www.wanrees.com
https://wanrooe.morndesign.com
Chinese Website:
http://www.China-tireshredder.com
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