Continuous Mixing Kneader for Counterflow Extraction of Superabsorbent Polymers

The patent implements continuous extraction and drying processes replacing batch operations. The mixing kneader continuously processes superabsorbent polymer material while extractant circulates through the system, enabling uninterrupted operation that simultaneously improves energy efficiency and processing throughput compared to intermittent batch drying.

The patent replaces conventional thermal drying mechanisms with mechanical extraction using a mixing kneader system. The kneader uses mechanical agitation and counter-current flow of extractant to remove water and solvents, substituting energy-intensive thermal processes with mechanical separation that consumes less energy while maintaining high productivity.

The mixing kneader is designed to perform multiple functions simultaneously: mixing, kneading, and continuous extraction. The device integrates extractant injection systems, counter-current flow paths, and separation mechanisms within the kneader structure, allowing a single unit to handle both mechanical processing and chemical extraction operations that were previously required from separate equipment.

The kneader is divided into functional zones including material input sections, extractant injection points, mixing chambers, and discharge areas. This segmentation allows independent optimization of each zone for its specific function while maintaining overall system integration, enabling complex extraction capabilities through modular functional divisions.

The patent changes the physical-chemical parameters of water removal by using extractants that alter the boiling point and evaporation characteristics of bound water. By replacing water with extractants having different volatility profiles, the drying process occurs at lower temperatures or under milder conditions that preserve polymer structure while reducing energy requirements compared to conventional high-temperature drying.

Extractants serve as intermediary substances that facilitate water removal from the polymer matrix. The extractant molecules intercalate between polymer chains, solvate bound water, and enable its gentle removal through controlled evaporation or phase separation, acting as a mediator that protects polymer structure during the drying process while consuming less energy than direct thermal drying.