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 Air
Hygiene International, Inc's emission testing trailers
are designed for various types of emission testing projects which
may include any combination of real-time gas analysis along with
wet chemistry sample collection. Our emission testing trailers are
typically operated by two, three, or four man testing crews with
an experienced project manager on-site at all times and involved
in the testing operation. The trailers are at least 16 feet long
with a sample bank of gas analyzers, wet chemistry/particulate workbenches,
and the supporting equipment detailed below.
- Sample Probe:
typically stainless steel tube of various lengths or diameters;
used to transport gas from various locations within the stack
flow to the probe housing.
- Probe Housing:
preheated to 400 degrees Fahrenheit to minimize gas condensation;
contains pressure valve to automatically switch from stack analysis
to bias run; contains connections for sample nozzle, heated sample
line, and bias line.
 Sample
Line: available in 50 or 100 foot lengths and may be connected
to allow any desired length from stack to testing lab; preheated
to 250 degrees Fahrenheit to minimize gas condensation; main sample
line and bias line run in parallel with both wrapped in heating
coil; attaches probe housing to gas conditioner.- Gas Conditioner:
thermal electric chiller that runs at 4 degrees Celsius; moisture
from the stack gas is condensed and pulled out by a peristaltic
pump; minimizes stack gas contact time with moisture.
- Manifold: controls
the flow of gas for analyzer calibration, stack gas analysis,
and biasing; monitors the total flow rate of the system and the
flow rate going to each analyzer.
- Gas Analyzers:
typically include oxygen, carbon dioxide, carbon monoxide, nitrogen
oxides, sulfur dioxide, volatile organic hydrocarbons, and total
hydrocarbons (THC).
- Logicbeach Hyperlogger
Data Recorder: records electronic signal from each analyzer
in database type format; uplinks directly to laptop computer and
allows real-time tracking, real-time trending/graphing, and immediate
downloads and reporting.
 A
typical system setup extracts stack gas through the sample probe,
into the probe housing, through the heated sample line, into the
gas conditioner, through the analyzers, and out the vents (See
Unit #201 Schematic). A portion of the stack gas
can be redirected before the gas conditioner for analyzers that
require a wet gas sample (i.e. THC). A few adjustments to the manifold
board allow for a quick change from stack gas sampling to running
a calibration or a bias. For specific HAP analysis, conditioned
gas samples can be metered through selected collection media and
analyzed by gas chromatographs.
With our emissions testing trailer, Air
Hygiene can offer clients several "extras"
which include:
- SPIDER
Networking: running a network cable directly from the
mobile lab to the control room to let the client see analyzer
data in real-time without having to wait for results to be called
in on radios or carried in from the lab. Networking makes it easier
to map engines and to make load and fuel changes.
- Instant Reports:
with our preprogrammed hyperlogger system, on-board printer/copier,
and system integrated laptop computers; Air
Hygiene can have reports ready for the client in the
field within minutes after the testing is completed.
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