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Conical Screw Vacuum Dryer

Widely used for drying high-end materials in the pharmaceutical, fine chemicals, food, and health supplement industries.

Fully Automatic Control

Gentle Stirring

Energy-Efficient and High-Performance

Sealed and Clean

Product Overview

This equipment employs a combined orbital and rotational drive system. The rotating arm is equipped with a screw agitator, which creates an effective mixing flow within the tank to achieve efficient mixing and vacuum drying. The equipment operates in a fully enclosed, negative-pressure environment and, when combined with a vacuum condensation system, enables complete solvent recovery. Drying efficiency is 2.5 times higher than that of traditional equipment, while energy consumption is reduced by more than 50%.

Principles of Drying

The wet material enters the tank, where heat exchange occurs through the jacket to provide a heat source for the drying process. The material undergoes both horizontal mixing and vertical circulation, creating an effective mixed flow that ultimately achieves the dual process objectives of mixing and drying.

Vacuum Sampling

A sampling valve with a patented special design that enables online sampling under sealed vacuum conditions.

Pneumatic Ball Valve

This internally heated ball valve, featuring a pneumatic bladder seal and protected by a patent, enables flow control, in-place cleaning, and backflushing, and complies with GMP and FDA clean manufacturing requirements.

All-in-One Functionality

It combines mixing, drying, and discharge into a single unit, streamlining the process, simplifying operation, and delivering high overall efficiency.

Online Cleaning

It contains an in-line spray ball that covers the entire inner surface of the equipment, enabling in-line cleaning.

Main Uses

This equipment is widely used for drying materials of various densities, particularly loose materials, free-flowing materials, crystals, and granular materials in the pharmaceutical, chemical, food, and new materials industries.

Chemical Industry

Pharmaceutical Industry

Food Industry

New Materials Industry

Product Structure
Transmission System

Equipped with two independent drive systems for orbital and rotational motion, along with two independent mechanical seal assemblies, the unit ensures stable and reliable mixing operation and prevents foreign objects from entering the material.

Dryer Housing

The tank features a fully conical design with a small cone angle, an all-welded structure without container flanges, and no dead corners for easy cleaning. It can also be disassembled in sections for convenient maintenance.

Trap

Equipped with multi-core fabric bag or multi-layer sintered mesh collectors, featuring heated cleaning and reverse-blow functions, these collectors are resistant to clogging and effectively reduce vacuum loss.

Discharge Valve Assembly

This pneumatic-sealed ball valve supports opening adjustment, online cleaning, and backflushing functions, ensuring thorough and complete discharge with no solid material residue.

Sealing Structure

Featuring a reliable bottomless bearing stirring drive mechanism, combined with a specially designed sampling valve, it enables online sampling under sealed vacuum conditions, thereby eliminating cross-contamination.

Screw

As the unit rotates on its own axis, it draws material from the bottom of the tank and circulates it upward; at the same time, the rotating arm performs a radial circular motion. The material is mixed in the horizontal plane and circulates in the vertical plane, creating an effective mixing effect.

Optional Features

Custom Materials

Surface Finishes

Upgraded Configurations

Specifications
Model Total Volume (L) Effective Volume (L) Specification (mm) Lug Center Distance × Overall Height
DLG-500 1000 500 DN1300 φ1650×3200
DLG-750 1650 750 DN1500 φ1850×3600
DLG-1000 2400 1000 DN1700 φ2050×4000
DLG-1500 3300 1500 DN1900 φ2300×4500
DLG-2000 4500 2000 DN2100 φ2500×5000
DLG-3000 6000 3000 DN2300 φ2700×5500
DLG-4000 8000 4000 DN2500 φ2900×5900
DLG-5000 10000 5000 DN2700 φ3100×6300

 

Note: Custom design and manufacturing are available according to users' special requirements, such as material, structure, specification and dimension.