Two new industrial stacks for Spurlock Power Station in the USA

Its steel flues are protected with Pennguard linings

The East Kentucky Power Cooperative (EKPC) produces electricity for 16 regional power cooperatives. They serve one million consumers in 89 counties. The Spurlock Power Station near Maysville, Kentucky is EKPC’s largest power station. Spurlock station has recently completed two wet limestone flue gas desulphurization (FGD) systems, each with a new, PennguardTM lined industrial stack.

The two FGD systems were fitted to the 325 MW Unit 1 (in service since 1977) and the 525 MW Unit 2 (in service since 1981). Both are conventional coal fired units, using coal with a sulphur content of 3.5 % – 4.2 %. The two FGD’s will remove some 98 % of the sulphur oxides from the exhaust gas flows of Units 1 and 2. In addition to Units 1 and 2, the Spurlock station operates two 268 MW circulating fluidized bed (CFB) boilers. They are among the cleanest coal fired units in the United States.

industrial stack - spurlock-10
Hadek QA Inspector keeping track of temperture and humidity

The addition of FGD systems to Units 1 and 2 presented EKPC with several options for the industrial stacks. EKPC looked at the possibility of relining the existing Unit 2 industrial stack. This to make it suitable for carrying FGD treated, water saturated flue gas.
The fast construction and commissioning schedule of the FGD retrofit project however would not allow a sufficiently long outage to achieve this.

Therefore EKPC decided to award to Karrena International LLC the design and construction of two, 198 m high concrete industrial stacks. Each stack has a single, PennguardTM lined steel flue.