One chimney for two units at Leland Olds Station

The new scrubber stack at Leland Olds Station is unlike Basin Electrics other power plant stacks. This one will carry the flue gas from two units.

(Bob Weir/Construction supervisor, LOS Emissions Control): Unit 2 comes in from the south side and Unit 1 comes in from the north side.

This stack is different in another way. Most other stacks taper as they get to the top. This one doesnt. That was to make it simpler to get both flues into one chimney.

(Bob Weir/Construction supervisor, LOS Emissions Control): But since everything is fitted into the same cylinder, basically, it made more sense to keep it a continuous diameter.

When you stand at the top of the stack, youre 580-feet above the ground. The flues stretch another 20 feet beyond that. Each flue is made of 30-foot tall canisters.

(Bob Weir/Construction supervisor, LOS Emissions Control): They basically brought each can in one at a time, and they would raise one can up 30 feet. Then they would join another can to the bottom of that. They would fiberglass weld the joint, basically. And they would keep raising the cans up from the top, until they were all the way out the top of the chimney.

The material is laminated fiberglass not brick like the stacks that are used now at Leland Olds. The canisters are about an inch thick. But at the places where theyre hung inside the chimney, theyre about six to eight inches thick.

(Bob Weir/Construction supervisor, LOS Emissions Control): Theyre basically hung from an interior platform at the 555-foot elevation. Then theres also an expansion joint at 185 feet. So everything above 185 is hung at 555, and theres a support again below 185, and theres a support again where it exits the chimney.

It was the beginning of April when the flues were brought into the stack. All fiberglass work should be finished by the end of July. Theres still electrical work and work on the elevator to complete. The plan is to have it finished by October.

www.basinelectric.com

Category:

Science & Technology

Tags:

• Basin
• Electric
• Power
• Cooperative
• North
• Dakota
• Leland
• Olds
• Station
• coal
• power
• plant
• wet
• limestone
• scrubber
• sulfur
• dioxide
• project
• construction
• Stanton

[AviationPhotogBNA]

Okay, this really got my attention having worked at one of America's largest coal burning power plant before on a big outage (TVA Paradise Fossil Plant). I worked in the turbine room and never got to see the work out front! Another fine production and thank you for enlightening me!!