Blowers and Fans for Pulp & Paper Industry
Common AMCA arrangements for combustion air fans are arrangement 3 and 8, both with inlet vane or outlet damper control. EXHAUST FANS Exhaust Fans are typically used on the suction side of a scrubber or fabric filter, and pull the air / gas stream through the piping and cleaning device. Dissolving tanks are used in conjunction with Recovery Boilers to recapture process chemicals. Exhaust Fans draw hydrogen sulfide or sulfuric acid fumes through a wet scrubber. This corrosive atmosphere can require either FRP, stainless steel or alloy construction. Exhaust fans can be in either belt or direct drive arrangements. Lime Kilns may be used to recover lime used in paper manufacturing. The fans used in this process often require high pressure and handle corrosive gas streams. Straight radial or radial tipped blade designs, 304L or 316L stainless steel construction and special shaft seals are often employed. DRYERS Many dryers are used in the paper manufacturing process. These drying applications utilize fans extensively. Most of these applications are not extremely demanding on the fan equipment - except the Yankee Dryers that are used for the manufacturing of tissue, and require a rugged fan dersign to handle high temperature (up to 800 F) and pressure requirements. Arrangement 8 direct driven fans allow for access and maintenance of fan components. Accessories often include labyrinth or lip type shaft seals, insulated housings or thermal blankets, raised access doors, shaft cooling wheel and safety guards. Tough applications mean tough fans and blowers by Tenderall Fan.Pages: 1 [2] 3
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