Rotary Atomizer: key element in continuous drying process

The CMT objective is to meet the customer need designing the atomizer on the specific requests of users.
The atomizer converts through centrifugal force the feeding liquid into a spray of fine particles, whose high surface (wide ratio surface/volume) makes them suitable to drying directly with hot air in the spray dryer.
The correct phase of atomization depends on specific factors of the product to be treated, on other geometric/constructive factors of atomizers as well as on operational parameters such as speed, temperature, and of course on the interaction between them.
Viscosity, surface tension, solids content, as well as form and geometry of wheels used, type of distribution, use of fluids support as nitrogen or steam are variables determining the efficiency of the process.

CMT projects and produces atomizers from 1968

CMT atomizers are produced on the basis of 5 fundamental points:

• Smooth operation without vibrations, of great importance above all in the industrial productions
• Possibility to have great, obtainable centrifugal forces with elevated rotation speed of the wheel (more than 250 mt/sec.)
• Correct distribution of the product in the wheel, which must be uniform in order to avoid superficial sprays on the inner surfaces, cause of possible formations of cloggage
• Flexibility, of great importance in atomizers, in that they much must be able to deal with a range of materials during feeding and need to possess a controllable operation in order to produce any type of desired product
• The supporting structure is produced in such a way that a great rigidity is achieved, while the transmission is designed with the concept of a flexible shaft so that irregularity in the feeding rates or other minor imbalances on the wheel can be compensated without damage to the rotary parts

Safety systems

With the aim of guaranteeing maximum operating safety during operation, all the vital functions of the atomizers are constantly monitored:

• Control of the bearing temperatures
• Control of the vibrations in the more critical applications
• Control of the lubrication cycles
• Control with a pressurized system, in order to prevent possible wheel cloggages

For operation with high temperature air drying, a fan for internal cooling is needed.