Chemical Engineering September 2014 - 50

Cover Story
Authors
stream of the evaporator-crystallizer,
and as previously discussed,
will remove some hydrocarbons, although
miscible compounds such as
glycols would probably not come out
of the water phase as easily as nonpolar
materials. The same considerations
mentioned earlier regarding
hydrocarbon carryover from the
liquefaction process apply to wastewater
treatment, and become even
more critical as the wastewater becomes
more concentrated.
References
1. Stultz, S.C., and Kitto, J.B., " Steam - Its
Generation and Use, 40th Ed. " , The Babcock
& Wilcox Co., Barberton, Ohio, 1992.
2. Oxidative Dehydrogenation of Ethane to
Ethylene, accessed at: www.itcp.kit.edu/
deutschmann/img/content/od_habil_ii.pdf
3. B. Buecker, Modern Concepts in Makeup
Water Treatment, Chem. Eng., November
2011.
4. Cycle Chemistry Guidelines for Combined
Cycle/Heat Recovery Steam Generators
(HRSGs), EPRI, Palo Alto, CA: 2006.
1010438.
One drawback to evaporatorcrystallizers
is the significant energy
that is required for evaporating
large quantities of water. An
alternative possibility - see Ref.
8 - is a process that combines filtration,
softening and reverse osmosis,
which can reduce the discharge
volume to be treated by 90%. This
leaves a relatively small stream to
be further processed by a crystallizer
or other method.
n
Edited by Suzanne Shelley
5. Wisconsin to Expand List of Water Bodies
Under Phosphorus Pollution Threat, Processing
e-newsletter, February 20, 2014.
6. Post, R., Development and Application of
Phosphorus-Free Cooling Water Technology,
Cooling Technology Inst. Annual Winter
Meeting, February 3-6, 2014, Houston.
7. " Consensus on Operating Practices for
the Control of Feedwater and Boiler Water
Chemistry in Modern Industrial Boilers, "
The American Society of Mechanical Engineers,
New York, NY, 1994.
8. Buecker, B., Cooling Towers: Dealing with
Tighter Cooling Water Regulations, Chem.
Eng., Aug. 2014, pp. 57-60.
Brad Buecker is process
specialist in the Environmental
Services group of Kiewit
Power Engineers (9401
Renner Blvd., Lenexa, KS
66219; Phone: 917-928-7311;
Email: brad.buecker@kiewit.
com). The group provides
consulting and engineering
for industrial water, wastewater
and air-pollution-control
projects. He has more than
33 years of experience in the power industry,
much of it with City Water, Light & Power in
Springfield, Ill., and at Kansas City Power &
Light Company's La Cygne, Kan., generating
station. Buecker has written many articles and
three books on steam generation topics, and he
is a member of the American Chemical Society,
AIChE, the American Soc. of Mechanical Engineers,
the Cooling Technology Institute, and the
National Assn. of Corrosion Engineers. He has
a B.S. in chemistry from Iowa State University,
with additional course work in fluid mechanics,
heat and material balances, and advanced inorganic
chemistry.
Brian Clarke is a water and
wastewater project manager
in the environmental services
group of Kiewit Power Engineers
(KPE; 9401 Renner
Blvd., Lenexa, KS 66219;
Email: brian.clarke@kiewit.
com). He is a professional
engineer, licensed in Ohio.
Clarke graduated in 2004
from Ohio University with a
B.S.Ch.E. After graduating,
he worked in data analysis and consulting engineering
before transitioning to KPE, where he
has focused on the design of water and wastewater
systems for power-generation facilities.
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50 ChemiCal engineering www.Chemengonline.Com September 2014
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