Eliminate Visual NOx Emissions during Plant Start-ups
Two nitrate products producers were looking for a solution to their
visual NOx emission plumes during frequent plant start-ups that would
satisfy both public and regulatory expectations.
USP Technologies was
brought in to design a proprietary technology solution which introduces
dilute H2O2 into the NOx absorber during start-ups to reduce emissions
of NOx compounds such as NO and NO2. Removals of >90% are achieved,
with the NOx being converted to high quality HNO3 product. The process
is offered under license designed to minimize risk and disruption to
operations. The license includes chemical storage and feed equipment,
piping and instrumentation, process safety controls, installation and
maintenance, training and documentation as well as H2O2 supply service.
USP performed a thorough Process Hazards Analysis on the process,
which has resulted in several interlocks and controls being incorporated
into the basic design. The process is currently used safely in over 30
start-ups per year at two HNO3 manufacturing units. All piping,
components, and controls needed to operate the process safely are
included with the license and are installed by experienced H2O2
specialists. The H2O2 storage and feed systems are of modular design and
are code-compliant, with years of safe operating history.
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