GE P&W FuelSolv - Slag Control Treatment Program at EKPC Spurlock Station User Manual
Page 7
Technical Paper
Page 7
vious clinker in the same location, the clinker was
more brittle and easier to remove. The previous
clinker had to be high-pressure water blasted.
Likewise in the May outage, most existing clinkers
shed as the unit came down and cooled. The largest
wall clinker at the Left Front Wall trouble spot was
removed with a shotgun in about 10 minutes. Com-
pared to the previous clinker in the same location,
the clinker was more brittle and easier to remove.
The previous clinker took about an hour to remove.
No off-line, high-pressure water blasting was re-
quired.
In the Unit 2 October outage, some slag was ob-
served at the bottom of the RH at the bullnose near
the right corner. Mostly clear gas paths were ob-
served between RH assemblies. The large clinker at
the Left Front Wall trouble spot would not break up
with a shotgun but shed as the boiler temperature
dropped overnight. Small clinkers present at the
bottom of SH Platens were easily removed with a
shotgun. Aside from some small clinkers, furnace
walls appeared very clean.
Impact of Load Drop
Unit 2 experienced 18 days at the highest slag rat-
ing due to bridging on right RH & inability to remove
with sootblowing. Under these circumstances Unit 2
was dispatched to a reduced load causing slag to
shed. No noise or damage was caused by the ther-
mal de-slag.
Through some periods during the FuelSolv FMG2960
treatment program, the ability to soot-blow was lim-
ited. This was primarily due to limitations of the
plants compressed air system. It was not always
possible to soot blow the areas where slag buildup
occurred at the frequency that was required.
Burning the same coal blend in 2009,
Slag developed over 80% of RH
ID Fan Inlet pressure equaled –33 inches
Furnace pressure at +9.6 inches (Unit trips at
+10 inches)
Furnace pressure went positive and everything
behind the RH went very negative.
Unit 2-March 5
th
Outage
Unit 2-October 12th Outage
Lower Bullnose and SH
Assemblies from IK#1
Lower Bullnose and SH
Assemblies from IK#2
SH Pendant,
Bullnose and RH
from IK #10
RH Gas Lane Right Wall
from IK #10