Continuous Emission Monitoring Systems0 pages

ENVIRONMENTAL SYSTEMS

Thermo Scientific
Continuous Emissions Monitoring
System for Total Reduced Sulfur
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Using field-proven, pulsed fluorescence technology

Thermo Scientific™ Continuous
Emissions Monitoring System for Total
Reduced Sulfur features:
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Dry-basis measurement

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Reliable pulsed fluorescence
technology

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Corrective oxygen measurement

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Designed specifically for the pulp
and paper industry, and the USA
EPA 40 CFR Part 60 Requirements

The Thermo Scientific Continuous Emissions
Monitoring System (CEMS) for the
measurement of Total Reduced Sulfur (TRS)
is designed to meet the needs of the pulp
and paper industry in complying with the
regulatory requirements of 40 CFR part 60
as set forth by the U.S. EPA.
In order to measure TRS in accordance with
the federal regulations, the sample must
measured on a dry basis and be corrected
to a fixed Oxygen (O2) content. This is
accomplished by extracting the sample from
the process using the Thermo ScientificTM
PRO902C Low-Flow Dilution Probe.
First, the sample is passed through a water
removal device to provide a dry sample. The
oxygen content is measured and the sample
is diluted to an appropriate level, depending
on the site conditions.

Thermo Scientific CEMS for Total Reduce Sulfur

The diluted sample is sent through a sample
line to the instrument cabinet and passes
through a selective scrubber where Sulfur
Dioxide (SO2) is removed and TRS is allowed
to pass. Next, the sample is routed to a
thermal oxidizer where the TRS compounds
react with O2 under high temperature, and
is then sent on to the Thermo ScientificTM
Model 43i Pulsed Fluorescent SO2 analyzer.
The result of this process is that TRS
compounds are converted to SO2 in a 1:1
ratio. This means the SO2 reading from
the analyzer is a true representation of the
amount of TRS in the