Project
Description:
The
two wet scrubbers were designed and built 30-40 years ago. The FGD
system is a 65 MW coal-fired power plant. It is equipped with an
electrostatic precipitator and a wet flue gas desulfurization (FGD)
system for emission controls. The plant consumes approximately 550
tons of coal per day.
The
alloy construction of reheat tubes was being attacked by the flue
gas after wet scrubbing. The apparent problem is that the coal being
burned is high in chlorides- 0.03% by weight resulting in a huge
spike (10X) in slurry chlorides around 12000 ppm. The 316 L outlet
reheater tubing is showing pitting from chlorides in the flue gas.
Internal water temp is 200F in the tubes with external flue gas
at 180 F. Steam at 600 F is sparged into the scrubber column below
the reheater tubes at scheduled intervals
These
conditions are similar to conditions experienced in the Jet Bubble
Reactors, scrubbers and ductwork made of alloy that are being attacked
by high chloride coal burning.
 Tubes
were coated from above and below with specialized spray equipment
using ChemLINE 784-32 Gray Top Coat. After Scrubber #1 was coated,
the client decided to immediately to line the reheat tubes in Scrubber
#2.
The
client was satisfied that the stainless tubes were lined within
budget and will extend the life expectancy of the tubes. No significant
heat transfer loss has been detected and the scrubber is working
at peak performance.
ChemLINE
from APC has proved that under the most challenging environments
of heat, corrosion and wear, the ChemLINE polymer will provide long
term solutions to coal burning with chloride contamination of the
flue gas. We welcome discussions from other clients that find that
their alloy construction has had similar corrosive conditions.
Because
the ChemLINE linings have a higher cross link density,
ChemLINE will out perform all other polymer formulas
and provide
-
Superior corrosion resistance performance to over 5,000 chemical
reagents
-
Resists 98% of all corrosive acids, alkalis, solvents, gasses
and various temperatures
-
Aggressive Chemical Exposures
-
High wear and abrasion resistance
-
High Heat resistance to 500F
-
Flexible film - Impact resistant
-
Repairable lining
-
Superior corrosion performance verse stainless steel, baked phenolic,
epoxy
and vinyl ester
-
Not effected by chlorides like stainless steel
-
40X smoother than epoxy / 4X smoother than stainless steel
-
Non Permeable won't absorb or contaminate making it an idea food
contact lining
-
Thermal shock resistant: - 40F to 400F
A revolutionary
lining for the Flue Gas Desulphurization Process.
- ChemLINE
is specially formulated polymer resin for handling the high temperature
and abrasion requirements of FGD systems.
- ChemLINE
is a cross-linked organic-inorganic multifunctional polymer coating
that exhibits high flexibility and toughness
- ChemLINE
LE temperature resistance (500°F/260°C)
- Superior
resistance to Acids, alkalis, solvents, oxidizing agents
- Thermal
shock -40°F (-40°C) to +500°F (+260°C)
- Flex
stressing
- Wear
and abrasion
- Impact
resistant
For
more information please contact:
Paul
Turner
Tel: 586-792-3325
Fax: 586-792-2711
Email:
info@chemicalcontainment.com |
