High Efficiency Cyclones

Special heavy-wall constructions are also offered to meet high pressure applications, or a combination of high pressures and temperatures.

For applications involving severe abrasion and/or extremely high temperatures, such as occur in catalyst recovery systems, or roasting and similar pyroprocessing operations, Classifier Milling Systems provides refractory-lined cyclones.

The type of refractory lining, its method of application and its thickness depend upon the environmental conditions and process requirements of the specific application. Where highly abrasive dusts are being handled at moderate temperatures, several abrasion resistant castable linings are offered. These are troweled into a hex-mesh metal anchor. An abrasive-resistant brick lining, such as fire brick or silicon carbide can also be provided for such applications.

For extremely high temperatures - up to 2500F - high strength poured castable linings are offered. These linings have excellent insulation properties and resist abrasion and spauling.

Multi-layer refractory constructions have been developed to meet extremes of both heat and abrasion. These include a castable refractory overlaid on insulation block, abrasion-resistant brick or tile on insulation brick or castable and other dual and even triple layer combinations of varying thickness'.

In some applications an exterior insulation is also provided to minimize process heat loss and to assure safety of personnel.

Coil Analogy

Upon entering a cyclone the largest and/or heaviest particles which reach the barrel wall form a relatively dense and narrow stream which travels down through barrel and cone in a continuous spiral path. The entering gasses also initially describe a spiral path within the barrel, but eventually follow aerodynamic pressure gradients and travel inward to be exhausted through the upper gas outlet tube, while the stream of collected solids flows out through the hole in the bottom of the cone. This spiraling pattern may be considered analogous to the flow of gas and solids through a coiled pipe provided with a narrow slit along its inner length to permit gradual dissipation of the gas.

Centrifugal force effect: Such a spiraling particle/gas stream is subject to substantial centrifugal force. For example, a conventional 3 foot diameter cyclone at an inlet velocity of 70 ft/sec. Imposes a peripheral force of 100g's on entering particles; at 100 ft/sec. inlet velocity at 1 foot dia. Unit exerts 620g's.

Because of the many variables that affect cyclone performance, it is important to provide Classifier Milling Systems with complete data for consideration in determining the proper size cyclone. In some cases where the material being collected has some unusual characteristics, it is recommended that samples of the dust be submitted to Classifier Milling Systems for test and analysis. From the data provided, and from the detailed specifications on required capacity, efficiency and pressure drop, we will recommend one or more cyclone designs.

Cyclones

Available in stainless steel and carbon steel construction. The body, cone and dust trap is one piece all welded construction with internal welds ground smooth. An extended acceleration inlet tube for optional efficiency with inlet prepared for quick-release coupling for ease of cleaning. An outlet tube and exhaust is removable to provide access to inside from top. This eliminates the need for access doors, and flanged connections in body which produce horizontal ledges. These can decrease efficiency and accumulate powder and are difficult to clean. The exhaust connect is also prepared for a quick-release coupling.

Cyclone Classifiers

The CMS Cyclone Classifier is designed to remove a specific size range of particles. This cyclone is designed to handle a wide range of dry materials in the following industries; chemical, food, pharmaceutical, cosmetic, plastic, cement, lime and rock. This unit has been successful in running such materials as pigments, fillers, ceramics, dyes, resins, chemicals, insecticides, flours, clay, limestone, cement and many others.

The classifier is adjustable over a wide range of particle sizing through the use of a variable speed separator wheel. This unique feature permits the operator to shift from one classification to another without shutting the unit down. Materials of pre-selected finess are carried through a lower outlet duct leaving the excess dust material to be discharged through an upper outlet duct to a CMS Dust Collection Unit.