JAMAR COMPANY
HAS BEEN AWARDED A MAJOR RETROFIT AND MAINTENANCE CONTRACT
AT ALLIANT ENERGY'S COLUMBIA AND EDGEWATER GENERATING
STATIONS IN WISCONSIN
Jamar
Company has been awarded a major retrofit and maintenance
contract at Alliant Energy's Columbia and Edgewater coal
powered generating stations in Wisconsin. Alliant
Energy Corporation is an energy holding company involved
in delivering electric and natural gas related products
and services to customers in the Midwest.
Alliant
Energy Columbia Generating Station
Columbia
Unit 2
Jamar will be replacing a 27 year old reheater during a 7-week major overhaul
on Columbia Unit 2.
The
process of replacing the reheater involves cutting the
tubes free from the inlet and outlet headers in the boiler.
Front pendants will be lowered through the furnace and
removed through a large opening cut in the furnace water
wall at the turbine deck. After all the old pendants are
removed, the new pendants will be transported to the furnace
via a monorail through the same opening and hoisted approximately
150 feet into place. Each pendent will be aligned and secured
in preparation for final welding.
Removal
of Reheat Elements
Typical Orbital Tube
Weld
Due
to the number of welds required in the reheat replacement,
orbital welding will be utilized. In
orbital welding the arc from the welder is rotated around
the tubing weld joint. The arc welding current is regulated
with a control system thus, automating the entire process.
The result is a more precise and reliable method than manual
welding.
Jamar
will also install a new low NOx air system
and replace the ID (Induced Draft), FD
(Forced Draft) and air heater outlet dampers.
These regulate the massive flow of air
through the boiler. Air heater dampers
regulate airflow to the air heater. Jamar
will also perform normal annual maintenance
on the unit.
Columbia
Unit 1
Jamar will perform normal annual maintenance along with a major soot blower modification
for Diamond Power International's Columbia Unit 1.
During the three week outage Jamar will remove
the existing soot blowers and piping, modify valve station platforms
and install 84 new soot blowers along with new steam and thermal
drain piping. Due to the short outage window, Jamar will utilize
pre-fabricated piping where possible.
Alliant
Energy Edgewater Generating Station
Edgewater
Units 4 & 5
Jamar will perform normal annual maintenance on Edgewater Units 4 and 5 in three
separate outages which will take place in the Spring and Fall of 2005.
Jamar will also perform a reheat retrofit, installing a new reheater in an existing
boiler that did not previously have a reheater. The retrofit includes 65 new
outlet elements.
