The Florida Department of Environmental Protection on Nov. 20 issued a final air construction permit that allows the removal of the fabric filter baghouse in the fuel handling building at the coal-fired St. Johns River Power Park of JEA.
“On September 16, 2014, JEA submitted an application requesting authorization to remove the fabric filter baghouse (DC-3) on the fuel handling building, which is associated with the SJRPP fuel and limestone handling and storage operations, emissions unit (EU) 023,” said a DEP approval document. “JEA has determined that this baghouse is not needed to control emissions of PM since the transfer points in the building are partially enclosed and the characteristics of the coal do not generate large quantities of fugitive dust. Also, the baghouse is located on the top of the building and difficult to service and does not draw significant PM emissions. To control emissions of PM, JEA is proposing to install water mist spray bars at several transfer points within the building, employ regular house cleaning measures and best management practices to minimize the generation of fugitive dust.”
SJRPP Boilers No. 1 and No. 2 are fossil fuel-fired steam generators which are fired by pulverized coal, a blend of petroleum coke and coal, natural gas, new No. 2 distillate fuel oil (startup and low-load operation), and “on-specification” used oil. Emissions from these boilers are controlled by an electrostatic precipitator, a limestone scrubber, and low-NOX burners. SJRPP Boiler Nos. 1 and 2 are also equipped with elective catalytic reduction (SCR) systems and ammonia injection systems.
Also, the department on Nov. 14 went out for comment on a draft air construction permit to authorize a project to temporarily reintroduce a mixture of bottom ash and fly ash into two boilers at the Northside Generation Station (NGS). JEA’s Northside Generating Station and the St. Johns River Power Park are located near each other in the Jacksonville area and are covered by the same air permits.
Said a draft permit document: “JEA applied on August 25, 2014, to the Department for a minor source air construction (AC) permit. The applicant has requested permission to reintroduce a mixture of bottom ash and fly ash into NGS CFB boiler Units 1 and 2 (E.U. Nos. 026 and 027). This bottom ash/fly ash byproduct, all of which was generated and stored on site, contains lime because of the use of limestone in the boilers as a control strategy for SO2 emissions. Therefore, the reintroduction of the byproduct is expected to aid in SO2 control, likely decreasing the amount of limestone needed. The reuse of bottom ash is already permitted, but the reuse of fly ash requires this permit. This project also includes regular testing for mercury in stack emissions and in fly ash and bottom ash. The test period will last for six months, followed by a period of approximately three months for analysis and possible submission of an application to revise the facility’s Title V operating permit.”
The Northside Generating Station consists of three boilers and four combustion turbines. NGS Boiler No. 3 is an existing, pre-New Source Performance Standards boiler with a nominal rating of 564 MW and it is fired by natural gas, landfill gas, No. 6 residual fuel oil, and used oil. Emissions from the NGS Boiler No. 3 are uncontrolled. NGS CFB Boilers No. 1 and No. 2 are circulating fluidized bed (CFB) boilers fired by coal, coal coated with latex, petroleum coke, and landfill gas. Each NGS CFB boiler is equipped with a selective non-catalytic reduction (SNCR) system to reduce NOX emissions, limestone injection to reduce SO2 emissions, fabric filter to reduce particulate matter (PM) and PM with a mean diameter of 10 microns or less (PM10) emissions, while maximizing combustion efficiency and minimizing NOX formation to limit carbon monoxide (CO) and volatile organic compound (VOC) emissions. The four pre-NSPS distillate fuel oil-fired combustion turbines have a nominal rating of 52.5 MW each and are referred to as NGS Combustion Turbine (CT) Nos. 3, 4, 5 and 6. Emissions from the NGS CT Nos. 3, 4, 5 and 6, are controlled by firing low-sulfur fuel oil.
Notable is that JEA said recently that Northside Boiler No. 3, the one mostly fired with natural gas, will be put into “reserve storage” by December 2015, four years ahead of its scheduled retirement.