Chemical Engineering January 2011 - 21

Met-Pro
SO2 ABATEMENT SERVICE PROVIDERS
DuPont . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . www.dupont.com
Haldor Topsøe .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
. www.topsoe.com
Marsulex Environmental Technologies . . . . . . . . . . . . . . . www.marsulex.com
Met Pro Environmental Air Solutions . . . . . . . . . . . . . . . . www.met-pro.com
Pollution Systems. . . . . . . . . . . . . . . . . . . . . . www.pollutionsystems.com
Solvay Chemical SOLVAir Solutions . . . . . . . . . . . . . . . . . . .www.solvair.us
Tri-Mer Corp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ww.tri-mer.com
FIGURE 2. This installation includes
a dust collector for ash and particulate
matter, quench to cool combustion
gases, a vertical packed tower for SO2
removal and a stack and fan for ventilation.
It represents a total solution for
SO2 and pollution abatement
tions can be made to the operating
parameters by increasing liquid rates,
adding additional packing to the tower
or changing to a more efficient packing
design in the tower to enhance the
performance as needed, " says Steve
George, industrial sales manager.
However, Marsulex's Staehle suggests
that an alternative semi-dry,
multi-pollutant technology - a circulating
fluid bed scrubber that has been
widely used in China and Europe -
might be a good way to meet stricter
SO2 guidelines for many sources. A
version of this, marketed by MET as
the CFB-FGD (circulating fluid-bed,
fluegas-desulfurization) technology,
employs multi-stage humidification,
which injects humidification water at
multiple levels, separate from the reagent,
into the absorber vessel. This
scrubbing approach does not make
use of reagent atomizers, so it eliminates
the issue of trying to maintain
one-hour emission-averaging levels,
says Staehle.
Another technological alternative
might be DuPont's Lbbsorb Regenerative
SO2 Scrubbing System, which
removes SO2 from a gas flow for emission
control, while minimizing the
costs of wet scrubbing. It also nearly
eliminates scrubber-water discharge
normally associated with wet scrubbing
systems.
With this process, the scrubbing reagent
is regenerated for reuse, while
at the same time recovering a highconcentration
stream of SO2 (90+%) as
a byproduct for use in other processes.
The recovered SO2 can be used as an
additional process feed for existing sulfur
recovery units, as well as sulfuric
acid plants. With further processing, it
can be sold as commercial-grade liquid
SO2, sulfuric acid or elemental sulfur.
" With all the technologies available,
processors have the ability to really
do their homework and find the solution
that will work best in their facility
while meeting the tighter requirements, "
notes Staehle. " There is still
time to figure out what you're doing
with your plant and time to figure out
how to do it in a way that works best
for you. "
■
Joy LePree
Vanton solid thermoplastic pumps to stainless,
high alloy, plastic-lined and fiberglass pumps for
wastewater and corrosive treatment chemicals:
* ZERO CORROSION
(unlike stainless and alloys)
* ZERO CONTAMINATION
(unlike stainless and alloys)
* ZERO CHEMICAL
ABSORPTION OR WICKING
(unlike fiberglass reinforced
plastics)
* ZERO TEARING, CRACKING,
OR PEELING
(unlike plastic linings)
* ZERO OR NEAR-ZERO ABRASION
(unlike stainless, alloys, and fiberglass)
Vanton molds all wet end components of
solid, homogeneous thermoplastics that
are 100% inert to the caustic and acidic
treatment chemicals you handle, such
as alum, ferric chloride, hydrofluosilicic
acid, polymer, sodium hydroxide, sodium
hypochloride, sulfuric acid and others.
All wet end components of Vanton
centrifugal pumps are molded of solid PVC,
PP or PVDF, and handle flows to 1450 gpm
(330 m3
/h), heads to 400 ft (122 m) and
temperatures to 275°F (135°C).
It means you can say good-bye
to pumping problems you now
experience with chemical transfer,
disinfection, dosing, effluent
collection, lift stations, odor control,
recirculation and other process
applications.
SUMP-GARD®
Vertical
Centrifugal Pumps
Standard, bearingless,
low headroom, wash
down, integral motor/
shaft and vortex
CHEM-GARD®
Horizontal
Centrifugal Pumps
Standard, ANSI, DIN,
mag drive, close coupled
and self priming
FLEX-I-LINER®
Rotary
Non-metallic
Peristaltic Pumps
Dosing/feeding liquids
and viscous fluids
to 6000 SSU
Pump/Tank Systems
Tanks from 60 to 5000 gal
(227 to 18,900 liter) with
pumps and automated
controls
1-908-688-4216
.com
mkt@vanton.com
Circle 25 on p. 58 or go to adlinks.che.com/35061-25
CHEMICAL ENGINEERING WWW.CHE.COM JANUARY 2011 21
Y-1164
http://www.dupont.com http://www.topsoe.com http://www.marsulex.com http://www.met-pro.com http://www.pollutionsystems.com http://www.solvair.us http://ww.tri-mer.com http://adlinks.che.com/35061-25 http://WWW.CHE.COM
Chemical Engineering January 2011

Table of Contents for the Digital Edition of Chemical Engineering January 2011
