| CUBS* - COMBINED SNCR/SCR UREA SYSTEM |
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Have you considered a unique
combination of SNCR and SCR
with a common urea feedstock?
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A unique combination of proven NOx reduction methods and ammonia generation technology. No longer is it necessary to store different chemical feedstocks or be concerned about ammonia related safety issues
when feeding combined SNCR/SCR systems.
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Description
In many situations where the maximum NOx reduction capabilities of conventional SCR systems are not necessary, and alternative SNCR systems may not economically provide desired NOx reduction, a staged SNCR/SCR system is believed to be the most appropriate solution available. HERA has developed the CUBS system for delivering nitrogeneous NOx reduction agents from a common urea feedstock, when it is appropriate to use combined NOx treatment stages (i.e. SNCR within the boiler followed by in-duct SCR and/or catalyzed air preheater elements). For the SNCR stage the urea from the common feedstock is diluted prior to injection into the boiler and, for the SCR stage, the urea from the common feedstock is used to produce ammonia. Urea solution which is not converted to ammonia in the SCR phase, is used for dilution of the solution being delivered to the SNCR system. The CUBS system provides a versatile, economic and safe arrangement for combined SNCR/SCR application.
Features and Benefits
CUBS installations take advantage of simple storage and preparation methods, producing no byproducts nor requiring any special hazardous material containment facilities.
Actually, the applicability of CUBS™ is not limited to a single boiler with both SNCR and SCR
installed.
Any
power
plant
that
has
simultaneous
need
for
urea
and
ammonia
(different
boilers,
various
applications, etc.) will benefit from this approach.
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CUBS and the Boiler
"A" - Urea based SNCR
"B" - Ammonia fed SCR
"C" - Common Urea/Ammonia delivery system
Typical Users
Fossil fuel burning energy producers, catalyst manufacturers, providers of SCR and SNCR equipment or services, and companies involved in NOx control.
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Contact
Hera LLC, 949.707.5432 |
*CUBS
is a
trademark
of HERA,
LLC.
U.S.
Patents
#
6,146,605;
6,403,046 |
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