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A New Facility and The Development of Better Exhaust Solutions

After tipping its hat to Robinson Fans numerous times in the fan company’s 118-year history, the power industry has a new reason to thank forward-thinking Robinson Fans: its participation in clean coal generation.

Robinson Fans and Robinson Service drew upon their innovative multi-stage design, manufacturing and "any-fan" service expertise to install new induced-draft fans as part of an emissions upgrade project for Tampa, Florida-based Seminole Electric Cooperative, Inc. Seminole Electric is one of the largest generation and transmission cooperatives in the United States and relies on two 650-megawatt pulverized coal boilers for base-load generations.

Begun in 2006, the details of the project required the installation of selective catalytic reduction for the generating station’s coal boilers. After successful implementation, Seminole Electric became one of the cleaner coal facilities in the United States in terms of regulated emissions.

Like most power industry projects, on-time delivery was essential for reduced costs and accurate power generation projections. Therefore, a very specifc schedule was put into place once design and engineering began. Under a tight timeline, Robinson Fans was challenged to respond with eight completely designed and manufactured induction draft fans. Thanks to exceptional project management, Robinson met its delivery and installation deadlines—a rarity for other fan manufacturers. And Seminole Electric now enthusiastically reports itself a very satisfed Robinson Fans customer. 

Innovation in Repair, Rebuild and Upgrades

Recently, a mid-Atlantic utility company realized that its paddle-wheel, or “whizzer wheel” exhausters were wearing too quickly, producing energy ineffciently and moving air at rates that weren’t up to snuff.  The utility company’s primary need was to increase power output by increasing air and particulate fow rate from coal mill exhausters with increased wear resistance. Searching for a custom solution, the utility partnered with Robinson Fans.  

To solve the utility’s problem, Robinson replaced the whizzer wheel design with an enhanced backward-curved fan and added non-structural inlet dust defectors, which are miniature fan blades placed between the main blades to direct heavy particulate airfow between the main blades of the fan wheel.

Robinson also improved the traditional paddle-wheel design by developing a narrower, shrouded wheel design, which improved energy effciency via a 3,000 acfm increase in volume and a 7.0 inch wg increase in static pressure. 

To ensure extended wear resistance, Robinson lined the fan’s interior with a lightweight, extremely durable ceramic tile. Through a proprietary testing method, Robinson identifed the exact fan locations where particulate contact would be greatest. On these places only, Robinson used tungsten carbide for superior durability.

After 20 weeks in operation at the power station, the Robinson backward-curved fan was opened and inspected. Little or no wear was detected. The fan is expected to exceed the utility’s requirement for an energy-effcient, cost-effective fan that will last at least two years without excessive wear. 

Unparalleled Response and Service

Robinson Fans offers extensive repair and rebuild capacities at many of its facilities. All of its facilities are dedicated to minimizing downtime by expediting repairs and meeting any need. No matter what the make, model, type or design of your equipment, Robinson Fans will repair and rebuild it.

Robinson Service also offers on-site repair and rebuild service. With a 24-hour hotline and 24-hour technician availability, Robinson Service  can analyze, service and keep your equipment running at maximum effciency.  

To contact Robinson Fans with fan design, manufacturing, implementation or service needs, call the Sales Department at (724) 452-6121 or email sales@robinsonfans.com.


Power Magazine ranked this project in its top six projects of the year. Click here to learn more.

 

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