East Kentucky Power Cooperative has completed a new SO2 scrubber and selective catalytic reduction (SCR) installation on Unit 2 of the coal-fired John Sherman Cooper power plant.
The Kentucky Division for Air Quality on Oct. 18 put out for comment a proposed Title V air permit renewal for the plant, which is needed every five years. In the documents, the DAQ noted that new flue gas desulfurization (FGD) and fabric filter for Unit 2 were due to be in operation by June 30, 2012, pursuant to a 2007 Consent Decree between the cooperative and the federal government. The fabric filter will replace the existing electrostatic precipitator. The SCR will be in operation by Dec. 31, 2012, under the Consent Decree, the permit added. A particulate matter (PM) continuous emission monitoring system (CEMS) will be installed by Dec. 31, 2012, as required by a Consent Decree modification issued Oct. 7, 2011, the DAQ added.
EKPC spokesman Nick Comer on Oct. 23 confirmed that the new emissions controls on Unit 2 were all operational around Aug 1. Planned emissions controls for the smaller and older Cooper Unit 1 are on hold as EKPC assesses the impact of U.S. Environmental Protection Agency rules, including the Cross-State Air Pollution Rule and the Mercury and Air Toxics Standards, Comer noted. A key factor in the Unit 1 decisionmaking is a request for proposals (RFP) that EKPC recently put out for up to 300 MW of capacity, with any power bought under that RFP a possible replacement for Cooper Unit 1, Comer noted.
Cooper is a power plant located on Lake Cumberland in Pulaski County. The station consists of two coal-fired boilers (with No. 2 fuel oil for start-up and stabilization), each supplying steam to a dedicated turbine-generator. Each boiler is a balanced-draft, dry bottom, wall-fired pulverized coal unit. The station has one 116-MW unit (Unit 1) that became operational in 1965, and one 225-MW unit (Unit 2) that began operating commercially in 1969.
The DAQ also reported that it received notice that EKPC will incorporate FuelSolv Treatment into the permitted operations at Cooper Unit 2. Due to the insignificant change in emissions from the treatment operation, this activity is considered trivial and will not be included in the permit. On April 25, 2012, the division received a request from EKPC to conduct a 90-day trial of FuelSolv FMG2960 Coal Additive to determine whether dust, slag and buildup are reduced in Unit 2. The Division approved the trial testing on May 3. FuelSolv is a highly concentrated liquid additive that contains a proprietary blend of metallic based inhibitors. It works by altering the sintering characteristics of slag, which results in reducing ash cohesive strength and slag buildup. EKPC has added up to 75 ml of FuelSolv per ton of coal burned, the DAQ said.
Also, the division received notification that EKPC plans to utilize two GE Betz products, DusTreat CF9156 and DusTreat DC6109, as coal additives. These additives are dust suppressants that will reduce fugitive emissions. DusTreat DC6109 is highly concentrated foam for the control of fugitive dust throughout the material handling system. DusTreat CF9156 is a concentrated blend of surface-active agents formulated to improve the flow of wet coal throughout coal handling systems. The product is designed to reduce the tendency of wet coal to agglomerate, thus reducing the potential for system pluggage. The DusTreat additives will be applied to the coal as it is being brought into the Unit 1 and Unit 2 coal silos.