Ring Dryer, Efficiently processing wet cakes and pastes

Providing extended residence times the ring dryer is a development of the conventional flash dryer. Barr-Rosin's unique centrifugal classifier allows the ring dryer to efficiently dry many materials that cannot be easily flash dried. Excellent for heat sensitive and high temperature applications or when improved product quality is a priority.

Flash Dryer

With short residence times for surface moisture removal and a low attrition configuration for fragile products, our flash dryers are ideal for processing both water and solvent wetted feeds. Extremely important to the successful operation of any flash drying system is the feed system. Barr-Rosin offers a wide variety of feed systems for different applications based upon significant experience in designing commercial installations.

Thermal Screws 

Features
•Long retention time    •Gas-tight construction   •Indirect heating or cooling   •Gentle handling

Thermal screws are used for drying, heating, polymerizing or cooling  applications where indirect thermal processing is required with minimal gas flow. Single or multiple intermeshing screw augers have hollow flights and shafts through which heat transfer fluid circulates. The screw casing is also jacketed to provide additional heat transfer surface. These units are widely used for special applications. Due to the low sweep gas flow rates there is practically no de-dusting equipment required. Thermal screws are usually fitted with variable speed drives for 0.5 rpm to 10 rpm.

Spray Dryer, At the forefront of technical innovation   

Whether your liquid feeds need centrifugal or nozzle atomization, Barr-Rosin's diverse range of spray dryer designs and choice of atomization techniques ensure the perfect drying solution for your application. Our spray dryers together with our patented direct drive rotary atomizer produce powders or granules from both solvent and water based feeds.

Rosinaire Paddle Dryers

 Features
•High heat transfer rates •Low gas volumes •Evaporation of solvents •Gas-tight construction

The Rosinaire is well suited for the drying of toxic substances and for the evaporation of solvents. They have also been used for heating, calcining and cooling. The material is maintained in an agitated state inside the vessel by a horizontal rotating shaft fitted with adjustable paddles which maintain the product in contact with the internal surface of the casting. The heating or cooling media required circulates in an outer jacket of the vessel. High heat transfer coefficients are achieved through intimate and turbulent exposure of particles to the vessel wall. A small gas stream is drawn through the system to carry away the evaporated water or solvent vapors.

Fluidized Bed Dryer, Gentle mechanical treatment

The Barr-Rosin Fluidized Bed Dryer offers long residence time for bound moisture removal, minimal breakdown of crystalline and granular particles and multi-zone beds for maximum thermal efficiency. Product cooling can also be installed, if required.

Fluid Bed Crystallizers & Column Dryers

The Barr-Rosin range of Fluidized Bed Crystallizers and Column Dryers is supplied to the principal polymer manufacturers and processors throughout the world. The units are used for a wide variety of processes including crystallization, solid phase polymerization and drying of polyester and polyamide chips. Barr-Rosin systems are already used in more than 200 installations for bottle polymer, fiber, filament, microfilament, and film production for outputs ranging from 50 kg/hr to over 5000 kg/hr. A typical solid phase polymerization plant for 4000 kg/hr is shown above.

Column Dryers

Features
•Gas-tight construction •Very long retention time •Compact arrangement •Uniform thermal treatment •Plug flow

These are normally used for drying essentially free-flowing materials such as amorphous or crystalline powders and granules to very low residual moisture or volatile content. Pre-drying and pre-heating of the material can be carried out in a fluid bed. Due to the long retention times possible, these columns are frequently used for diffusion controlled processes. They are also used for purging products of residual monomers or catalysts. The column dryers have been designed to give plug material flow and have a special gas distribution cone to ensure uniform counter-current flow up through the column. The effectiveness of the Rosin design allows us to specify very low gas flow rates and therefore achieve extremely low operating costs. This is especially important when the process gas is nitrogen, steam or other treated gases. If required the unit can be fitted with a stirrer. We can supply these units as part of a complete system.

Column Coolers

Features
•Cools bulk solids and provides hot water •High heat transfer rates •Built-in heat recovery •Simple and reliable •Low maintenance •Compact design

Column coolers are suitable for free flowing powders, crystals and granules. The Barr-Rosin column coolers capture 90-100% of the useful heat with water flowing through U-tubes suspended across a vertical column of slowly moving hot material. Depending on the application this hot water can be produced for use elsewhere in the plant. The column is designed as a mass flow vessel giving uniform residence time and even cooling to all the solids. A small counter-current flow of air can be made to pass up through the material adding a convective component to increase the overall process efficiency and provide a smooth running operation. The column cooler is simple and reliable - an ecological and economical alternative to the problem of cooling hot bulk solids. The Barr-Rosin column cooler has no moving parts other than feed and discharge units and water re-circulation pump.