Against the backdrop of increasingly complex waste paper feedstocks – from mixed office waste and old newspapers to post-consumer packaging with varied ink types – conventional flotation deinking tanks often fall short: single-size bubbles only capture large ink particles, leaving fine carbon and inkjet residues that drive up bleaching chemical costs; poorly designed flow paths cause pulp short-circuiting, leading to uneven deinking quality; and excessive aeration carries large amounts of good fiber into reject streams, eroding production yield. Leizhan’s Flotation Deinking Machine addresses these long-standing industry pain points through its innovative cyclonic micro-nano bubble generation system and three-stage stepped flotation tank design. The cyclonic bubble generators produce gradient-sized bubbles ranging from 10 to 120μm: larger bubbles quickly adsorb macro ink particles and plastic coating fragments for fast flotation, while micro-nano bubbles target submicron fine inks like laser toner and inkjet pigments that traditional systems miss, delivering a total ink removal rate of over 95%. The three-stage stepped tank guides pulp through primary separation, fine purification, and final washing zones in sequence, with independent aeration density and flow speed controls for each zone, eliminating pulp short-circuiting and reducing fiber carryover in rejects by more than 32% compared to standard single-tank designs.

 

Beyond core deinking performance, the machine’s intelligent adaptive control system and low-maintenance structural design greatly reduce operational and upkeep burdens for paper mills. Unlike conventional flotation units that require manual adjustment of aeration pressure and pulp level when feedstock quality fluctuates, this model is equipped with online whiteness monitoring and residual ink detection sensors that automatically tune aeration intensity, pulp level, and scraper speed in real time. Even when processing highly variable mixed waste paper batches, the system maintains deinked pulp whiteness within ±1% ISO, eliminating the need for constant on-site operator adjustments. The tank bottom features an inverted cone-shaped sediment collection zone with an automatic intermittent slag discharge valve, preventing heavy sediment buildup and bacterial growth common in flat-bottomed tanks, and cutting 2 to 3 mandatory shutdowns for manual tank cleaning per month. Wear-resistant polymer scraper blades further reduce maintenance costs, costing only 1/5 as much to replace as traditional metal blades while avoiding tank wall scratches and rust contamination.

 

As global paper markets raise requirements for recycled pulp content and environmental regulations tighten around chemical use and production waste, Leizhan’s Flotation Deinking Machine offers a proven, cost-effective upgrade for deinking lines of all production scales. Whether you manufacture high-whiteness cultural paper, soft absorbent household paper, or eco-friendly packaging paper with high recycled fiber content, this machine can be customized to match your capacity, raw material mix, and pulp quality targets. Partner with Leizhan to boost deinking yield, reduce bleaching chemical consumption, and deliver consistently high-quality recycled pulp that meets both market demands and sustainability goals.
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