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 Air
Hygiene International, Inc's mobile testing systems are
designed for various types of emission testing projects that include
any combination of real-time gas analysis along with wet chemistry
sample collection. We can ship our mobile testing systems worldwide
for fast mobilization for short or long term projects. The mobile
testing systems 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.
Typical uses of the mobile testing systems include:
- Temporary CEMS applications (i.e. when
permanent CEMS are not required, but testing over a period of
time [months] is desired).
- Temporary replacement of broken CEMS (use
our equipment while yours is down).
- International testing jobs.
The mobile testing system includes gas analyzers, wet chemistry/particulate
equipment, and supporting equipment detailed below.
- Sample Probes: 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 Lines: 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 Conditioners: thermal electric
chiller that runs at 4 degrees Celsius; moisture from the stack
gas is condensed and pulled out by a peristaltic pump; stack gas
has no significant contact with moisture.
- Gas Analyzers: typically include
oxygen, carbon dioxide, carbon monoxide, nitrogen oxides, sulfur
dioxide, volatile organic hydrocarbons (VOCs), and total hydrocarbons
(THC).
- Logic Beach Hyperlogger Data Recorder:
records electronic signal from each analyzer and records 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. 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.
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