GE P&W Hydrogen Sulfide Scavengers User Manual
Fact Sheet
Patented DEOX* Process
Description and Use
The removal of dissolved oxygen from aqueous
streams to <1ppb O
application uses a patented deoxygenation process.
at ambient temperatures. This
2
Typical Applications
Dissolved oxygen is a significant factor influencing
corrosion damage in boilers and steam generator systems. The GE DEOX process is a simple, effective and
proven process. The versatility of the process allows
use on virtually any source, including filtered surface
water, well water, reverse osmosis permeate, condensate and demineralised water. The chemical deoxygenation method consists of the addition of hydrazine
to an oxygenated effluent, then passing the mixture
through activated carbon to catalyse the reaction between oxygen and hydrazine, followed by a suitable
ion exchange bed downstream to remove any carbon
leachables or excess hydrazine.
Table 1: Reaction
General Properties
Equipment
The GE DEOX process is available for extended term or
emergency and supplemental service. Custom systems are recommended for extended term use, and a
variety of mobile systems are available for emergency
and supplemental requirements. The process is also
available under license agreement for users who wish
to use and operate the equipment employed.
The carbon catalysed reaction is stoichiometric and
rapid even at cold (1°C or 34°F) influent water temperatures. Dissolved oxygen effluent concentrations of
<1ppb are common from influent containing 12 to
14ppm dissolved oxygen. Activated carbon is a true
catalyst and is not consumed during the process. No
metallic catalysts are involved. The reaction products
are inert nitrogen gas and water.
Hydrazine has a unique advantage over other chemical oxygen scavengers such as carbohydrazine, diethyl hydroxylamine (DEHA), hydroquinone and sodium
sulfite; which add TOC, dissolved solids, carbon dioxide
and other impurities downstream. A “flywheel” effect
allows the system to operate temporarily after shut
down or loss of hydrazine feed without significant
quality degradation.
Figure 1: MobileFlow* Typical Loading Schemes
Figure 2: Typical loading performance
Find a contact near you by visiting www.gewater.com and clicking on “Contact Us”.
* Trademark of General Electric Company; may be registered in one or more countries.
©2014, General Electric Company. All rights reserved.
FS1056EN.doc 06
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