Indirect contact vacuum dryer for wet solids, pastes, and crystals — enables drying, heating, cooling, crystallization, and solvent recovery in a single enclosed system.
The Rotary Vacuum Paddle Dryer (RVPD) is a highly efficient, indirect contact drying system designed for drying, heating, cooling, crystallization, and solvent recovery of wet solids and pastes under vacuum conditions. The dryer consists of a horizontal cylindrical vessel fitted with a slow-speed rotating shaft equipped with specially designed paddles. Heat transfer is achieved through the jacketed shell and hollow paddles, ensuring uniform heat distribution while the vacuum operation allows drying at low temperatures, making it ideal for heat-sensitive materials. Continuous gentle agitation prevents material sticking, improves heat transfer, and ensures consistent product quality. RVPD systems are compact, energy-efficient, and suitable for batch or semi-batch operation, offering excellent control over final moisture content.
SEMCO Process Equipment
Rotary Vacuum Paddle Dryer (RVPD)
An in-depth technical analysis of Rotary Vacuum Paddle Dryers (RVPD), their working principles, specifications, and applications in chemical and pharmaceutical processing.
Rotary Vacuum Paddle Dryers (RVPD) are ideal for drying wet cakes, slurries, pastes, and crystalline materials. They are heavily utilized in pharmaceutical, chemical, and agrochemical industries for products requiring low-temperature drying under vacuum.
Yes, because the RVPD operates under vacuum in a fully closed system, the evaporated solvents can be completely recovered by passing the vapors through a downstream condenser, making it environmentally friendly and cost-effective.
Custom-engineered ethoxylation systems for safe, precise reaction control in non-ionic surfactant and specialty chemical production. Due to the hazardous and highly exothermic nature of the EO reaction, systems demand robust mechanical design and strict safety compliance.
Complete esterification process systems optimized for high conversion efficiency and consistent product quality. Efficiently handles the reaction between acids and alcohols with precise temperature control, effective mixing, and reliable by-product separation.
Safe, efficient sulphonation and sulphation systems for introducing sulfonic or sulfate groups into organic compounds — mainly for surfactant and detergent manufacturing. Highly exothermic processes involving corrosive chemicals, requiring precise control and superior equipment integrity.
