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Heavy Industry Blowers

By Expert Author: Susana Terlicki

Fans Mall Co. offers various designs of industrial fans and blowers for Pulp and Paper Industry.

The paper manufacturing industry utilizes fans for power boilers, recovery boilers, lime kilns, dissolving tanks, and dryers. These applications, which are integral to the production process, are often very corrosive. Reliability and durability of fans and blowers for such applications are vital for continuous operation. Fans Mall blowers for demanding and corrosive applications ofer real value - saving on future downtime and maintenance costs.

BOILERS

Boiler fans create efficient combustion by supplying a consistent and reliable ait flow. Induce Draft Fans (I.D. Fans) operate at elevated temperatures and draw the air stream through the combustion chamber, then push it through pollution control equipment. Forced Draft (F.D. Fans) or Combustion Air Fans push the air stream into the boiler combustion chamber. Multi-Fuel Burning Power Boilers are used to create steam for different power needs. Induced Draft Fans are typically AMCA arrangement 3, single or double inlet with inlet box(es). Wheels often require abrasion resistant construction with radial tip or backwardly curved blades. Combustion Air FD Fans are typicallyconstructed of carbon steel, and utilize airfoil or backward inlined blade design. 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 design 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 Fans Mall Co. Fans Mall is a world wide distributor of industrial process ans OEM fans and blowers, as well as fan / blower components; including high pressure blowers, high temperature fans, spark resistant and explosion proof ventilators, tubeaxial and vaneaxial high pressure ventilators. NISCO Fan Co. also does existing fans and blowers repairs, re-build, as well as dynamical wheels balancing. High-efficiency impellers result in low power consumption, operating costs, and quieter operation. All metal hardware is completely sealed from exposure to corrosion by incapsulating into FRP or plastic; the steel support frame and motor base are powder coated with a corrosion-resistant finish. In addition to being highly resistant to chemical corrosion, PP fans are self-extinguishing and will not support combustion.

Additional information can be found at the Fans Mall Company web site http://www.barryfan.net/industrial-impellers.html

Susana Terlicki
Industrial Equipment Engineer
Fans Mall Co.
nis@primus.ca
http://www.barryfan.net/airfoil-fan-blades.html
http://www.barryfan.net/industrial-fans.html

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