Application of Horizontal Decanter Centrifuge in Herbal Residue Dewatering

In the industrial production of traditional Chinese medicine and botanical extracts, massive wet herbal residues are inevitably generated after effective ingredient leaching and filtration. These waste residues contain a large amount of residual extracting solution, plant fibers and colloidal substances. Long-term stacking will lead to material deterioration, microbial breeding and sewage leakage, bringing huge pressure on workshop management, material transportation and environmental protection discharge.

Traditional herbal residue treatment processes can no longer adapt to large-scale and standardized production. Natural drying is greatly affected by weather with low efficiency and cannot achieve continuous industrial operation. Plate-frame filter presses and belt presses require frequent manual operation and regular replacement of filter cloths, resulting in high operating costs. In addition, traditional equipment cannot thoroughly separate residual liquid, and the final residues still maintain high moisture content, which increases subsequent transportation and disposal costs.

The horizontal decanter centrifuge provides a mature and efficient solution for herbal residue dewatering and reduction. Based on the principle of centrifugal sedimentation, the high-speed rotating drum forms a strong centrifugal force field. Solid herbal fibers with higher density rapidly settle on the inner wall of the drum and are continuously pushed out by the differential screw conveyor, while the residual extracting liquid with active ingredients is separated and recovered.

The whole dewatering process is carried out in a fully enclosed and automatic state, realizing 24-hour uninterrupted continuous production without filter aids or disposable consumables. Compared with traditional equipment, the decanter centrifuge features large processing capacity, stable separation effect and lower final residue moisture content. The recovered liquid can be returned to the extraction and concentration process to improve the yield of plant active substances. The dewatered dry residues are small in volume, easy to store and transport, and can be further recycled as biomass fuel, organic fertilizer and other renewable resources.

Equipped with adjustable rotating speed and differential speed, the decanter centrifuge can flexibly adapt to different types of herbal materials, fiber thickness and residue viscosity. The optimized screw structure effectively avoids material clogging and ensures long-term stable operation. Fully automatic operation greatly reduces manual intervention and labor costs, meeting the clean production and low-carbon environmental protection requirements of modern pharmaceutical factories.

With the upgrading of traditional Chinese medicine processing industry and increasingly strict environmental protection standards, continuous and efficient solid-liquid separation equipment has become indispensable supporting equipment for herbal deep-processing lines. The horizontal decanter centrifuge perfectly solves the industry pain points of low dewatering efficiency, high residue moisture and serious resource waste, providing reliable green recycling solutions for global botanical and TCM processing enterprises.