As a professional lime solution provide, ZK has developed an innovative and sustainable solution for producing high-quality lime by calcining industrial residues, specifically sugar/beet plant waste and papermaking white mud. Moving beyond traditional limestone-based production, this system embodies the principles of a circular economy by converting challenging waste streams—characterized by high moisture and viscosity—into valuable industrial products (lime and CO₂). The core design philosophy fully integrates energy conservation, environmental protection, and resource reuse. A successful reference plant is already operational in the UAE, validating the technology's commercial and technical feasibility.

1. Waste to Resource: Transforms industrial residues into primary products (lime powder) and recoverable by-products (CO₂ ).

2. Energy Optimization: Implements a multi-stage heat recovery chain (flue gas for drying, cooled lime for pre-heating combustion air).

3. Emission Control & Recycling: Features comprehensive gas treatment with dedicated collection of CO₂ and lime dust for reuse within the associated industrial complex, minimizing waste and environmental impact.

This integrated approach demonstrates an advanced and sustainable model for lime production within a modern industrial ecosystem.

1. Material Preparation & Drying: Sugar residue (30-40% moisture) is fed via a specialized box feeder to a metering belt conveyor. A shaftless screw conveyor, ideal for viscous materials, then transfers it to a rotary dryer. Here, a built-in chain device breaks up clumps to prevent wall adhesion and enhance heat exchange. Crucially, the dryer utilizes hot flue gas from the kiln tail, recovering waste heat.

2. Calcination & Cooling: The dried material enters the rotary kiln, where a burner system maintains a calcination temperature of approximately 1250°C, ensuring complete conversion to lime (CaO). The hot lime discharges into a single-cylinder cooler. Ambient air cools the lime down to approximately ambient temperature +50°C, and this pre-heated air is then recycled as combustion support air back into the kiln, significantly improving thermal efficiency.

3. Finishing & By-Product Recovery: The cooled lime is ground into powder in a ball mill. The flue gas treatment system is integral to the project's environmental and circular design: kiln exhaust first passes through a cyclone dust collector, then a heat exchanger, and finally a CO₂ collection unit. The captured CO₂ is intended for reuse in sugar production. Similarly, dust from the grinding system, collected by a wet scrubber, can be hydrated into lime for reuse in the sugar plant.

Note: This configuration table is for reference only and varies according to project site conditions and customers requirements.