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Paddle dryer

INTRODUCTION

Paddle dryer is an indirect conduction heating type drying device, which is suitable for processing materials with good thermal stability such as paste, powder and granular. After special configuration, it can be used for processing heat sensitive materials, materials that need recover solvents during drying process and materials that need to be dried under rough vacuum. At the same time, paddle dryer can also be used for cooling of powder and granular materials and cooling and crystallization of some special materials by injecting cooling medium. It also can inject heating medium for heating materials and reactor to be heated.

Applicable Materials:

Widely used in chemical, mining, metallurgical and other industries, such as ore, gypsum, coal, metal powder, diatomaceous earth, kaolin, and various of sludge drying, municipal sludge, paper sludge and other drying.

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Characteristic:

It adopts conduction type of heat transfer, the heat transfer efficiency is high.
The self-cleaning function of the heat transfer surface is good.
The product quality is stable.
The material loss is small, the product recovery rate is high.
The material adaptability is broad, the product is dried evenly.
It can combine drying and cooling together.
The equipment with compact structure occupies small area.
The design is unique, and maintenance of the equipment is easy.

Working Principle:

In the jacket shell body of paddle dryer there are two parallel shafts which have interleaved paddles. Each shaft has several hollow fan-shaped paddles which interleave with a certain spacing. There are two kinds of paddles: feed shear plane and return shear plane, the shaft rotates at low speed. A heating medium enters the hollow rotary shafts and paddles through a universal revolving joint. After heat transfer and drying, it is discharged through the revolving joint. The material is continuously fed into the equipment, next it is agitated and mixed near the paddles. At the same time, the material is gradually dried by the heat conduction of paddle and jacket. The height of overflow weir can be changed to adjust residence time. In addition, steam produced in the drying process is discharged through the escape hole with trace amount of air

Features

MOC : MS, SS304 & SS316
Heating Media : Steam / Thermic oil
Capacity : 50 kg/hr to 1500 kg/hr
High thermal efficiency
The heat transfer medium does not come into contact with the product
Gas is not used to transport the product. Minimal exhaust gas flow
Suitable for steam, water or oil as heating medium
Precise temperature control
Homogeneous product quality, full product mixing and movement
Continuous process in a single pass
High heat transfer area to process volume ratio – reduced footprint
Usually no pretreatment with recirculation required
Easy to operate, requiring little attention
Safer than direct drying when handling combustible materials
Simple and durable design for easy maintenance
Low product wear and tear
Reduced civil construction and installation costs
Suitable for all types of particles and free-flowing materials