Extractive gas analysers require sample gas which is dry, dust
free, at the correct pressure and flow rate. Correct conditioning of
the sample gas will ensure accurate measurement and reduce
maintenance cost and requirements of the gas analyser system.
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Coalescing filters |
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Corrosion resistant particulate and coalescing filters
Coalescing filtration is achieved by forcing
the gas stream through the filter element. The
flow path shown reflects a coalescing application. Small aerosol
particles are forced together as they pass through the fine inner
layer of the filter element. The larger drops created in this
process then begin to fall out of the gas stream due to their
mass.
- Coalesces liquid acid mists with excellent removal of SO2 mists
- Removes water droplets
- Large dirt-holding capacity
- Minimal maintenance
- Easily replaceble, low cost filter element
- Corrosion resistant
- Compact
- Simple installation
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Eductors |
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Eductors - non-mechanical pumps
Eductors provide a non-mechanical means of pumping or mixing a sample
stream. An eductor is a device in which the energy of one stream is used to pump another. The pumping gas,typically compressed air, it develops a vacuum at the suction port that causes the sample in the suction chamber to be entrained with the stream and be delivered through the exhaust port.
- No moving parts
- Minimal maintenance
- Compact design
- No elecrical parts, suitable for use with flammable gases
- Corrosion resistant
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FB
series inertial bypass filters |
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Inertial bypass filters
Filters for
high particulate load applications. Used upstream of fine
particulate filters, FB filters will greatly increase the life and
performance of particulate and coalescing filters.
Applications
for FB-Series bypass filter can be found in both CEMS and process
monitoring applications. In addition to reducing high particulate loads,
these filters can be installed to reduce the response time of
analysers by forming a fast by-pass loop.
Options include
heating, to prevent condensation,and an eductor.
Inertial
particle filtration improves life and reduces maintenance of fine
particulate filters mounted downstream
- Continuously filters
- No moving parts
- Transports large flow, reduces response time
- Cleanable components
- Compact design
- No electricity required
- Low pressure drop
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Ammonia scrubber |
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Ammonia scrubber
Ammonia scrubbers are designed to remove ammonia from a gas stream to protect gas
analysers from clogging due to the formation of ammonium salts.
Ammonia is sometimes added to stack gases to reduce the nitrogen
oxides content of the gases by conversion of them to nitrogen and
water DeNOx process). Typically, an excess of ammonia is added and will be present in the gas samples.
This ammonia residue will readily react with other components such
as sulphur dioxide in the sample to form
ammonium salts. This salt is relatively low-boiling, so when the
sample cools down it precipitates out as a solid, clogging
sampling line, analysers and other processing equipment.
The scrubbing principal is based upon phosphoric acid. The scrubber
requires occasional regeneration; the period depends on flow rate
and ammonia concentration.
- Lengthens analyser life
- Reduces maintenance
- No loss of analytes
- Easy replacement of scrubbing media
- No moving parts
- Heated to prevent condensation
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Heatless
desiccant dryers |
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Heatless desiccant
dryers
The Perma Pure heatless
dryer produces dry air with a dew point to -50 degC. It is designed for use with Perma Pure's Nafion™ sample gas dryers and sample conditioning systems. The unit only
requires electrical power and a supply of clean compressed air.
Flow rates of up to 90 l/min are possible depending on model.
Operation depends on two chambers filled with desiccant,
one produces the dry air, whilst the other is being regenerated.
Production of dry air is continuous and automatic.
- Continuous dry air
- Self-regenerating
- Minimal maintenance
- Simple installation
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Zero-Air
generators |
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Zero-Air generators
Bring Zero
air to the point of use without handling bulky and hazardous
compressed gas cylinders. The Zero-Air generator produces up to 18
l/min of purified air with just the flip of a switch. Compounds
removed include CO, NOx, SOx, water vapour, hydrocarbons, acid vapours, odours, and bacteria.
- Eliminates gas cylinders
- Pure, reliable, continuous Zero-Air
- Operates with ambient air
- Portable, compact and fully self-contained
- Nafion gas drying technology
- Low maintenance
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