Name: Dryer
Brand: JX Filtration

Description

JX Filtration offers a full range of dryers from compact laboratory models to large industrial units with processing capacities exceeding 1,000 kg/h, with flexible customization options to suit various material states and drying objectives across chemical, pharmaceutical, food, environmental, and metallurgical applications—energy-efficient, continuous or intermittent, and built for stable operation.

A dryer is a thermal separation device that removes moisture from solid materials through evaporation, using indirect heat transfer to drive off water or solvent. Our portfolio includes hollow paddle dryers and vacuum harrow dryers, each suited to different material characteristics and operational requirements. Unlike direct-heating dryers that rely on large volumes of hot air, these dryers use conduction heating through jacketed vessels and hollow agitator shafts, achieving high thermal efficiency with minimal exhaust volume.

Working Principle

Hollow Paddle Dryer: The dryer consists of a W-shaped jacketed vessel containing one or two hollow, low-speed rotating shafts fitted with wedge-shaped hollow paddles. Heating medium—saturated steam, thermal oil, or hot water—flows through the jacket and the hollow shafts and paddles. Wet material is fed into the vessel and comes into intimate contact with the heated surfaces. The wedge-shaped paddles provide a compression-expansion stirring action that continuously brings fresh material into contact with the heat transfer surface, while also providing a self-cleaning effect that prevents material buildup. Moisture evaporated from the material is carried away by a small amount of carrier gas or drawn off through a closed circulation system for solvent recovery.

Vacuum Harrow Dryer: The equipment is a horizontal cylindrical vessel with a jacketed heat transfer structure. A specially designed mixing mechanism with hollow rake teeth rotates inside the cylinder. Material is heated by both the jacket and the internal mixer simultaneously under vacuum conditions. The high operating vacuum lowers the boiling point of water, enabling low-temperature drying of heat-sensitive materials. Evaporated moisture is continuously pumped out by a vacuum system, and solvents can be condensed and recovered.

Advantages

High thermal efficiency – Indirect heating via jacket and hollow blades achieves heat utilization rates of 80%–90%, with no large volume of carrier air carrying away heat
Low energy consumption – For high-moisture materials, evaporating 1 kg of water requires only approximately 1.2 kg of steam
Self-cleaning agitation – The special wedge-shaped paddle geometry creates alternating compression and expansion, preventing material adhesion and ensuring stable heat transfer
Compact footprint – Large heat transfer surface per unit volume shortens processing time and reduces equipment size, saving building space
Wide material adaptability – Handles paste, granular, powder, cake, and slurry states; suitable for both heat-sensitive and high-temperature materials
Closed-loop operation – Minimal carrier gas results in low dust entrainment; closed circulation enables solvent recovery with simple, low-cost recovery equipment
Low operating cost – Low-speed stirring minimizes wear; normal operation requires only one operator per day
Stable product quality – Narrow residence time distribution ensures uniform drying; temperature, humidity, and mixing gradients are extremely small
Vacuum low-temperature drying – Ideal for easily oxidized, explosive, toxic, or heat-sensitive materials requiring gentle dehydration