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Ohio Lumex RA-915+/RP-M324 Sorbent Trap Mercury
Analyzer
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| Sorbent
Trap Mercury Analyzer |
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| Sorbent
Trap Mercury Measurement System overview |
Using a sample probe that will be inserted into the emission stack
and a sampling console that can accurately measure the volume
of gas sampled, the emission gases will be pulled onto a pair
of Sorbent Traps. Here, the mercury will be trapped in order to
be measured on the Sorbent Trap Mercury Analyzer.
- Ability to quantify 1 ng to 100,000 ng per analysis;
- easy calibration;
- can analyze an entire trap section including glass wool in
one run;
- most RATA analyses take about 90 seconds; high level analyses
- up to 8-10 minutes;
- exhaust is scrubbed, no clean room or hood is needed;
- perfect for field use;
- works great in the lab;
- real-time peak viewing allows run-time adjustment for abberant
samples;
- contains no catalyst, gold amalgam, or drying tube that require
frequent expensive replacement;
- requires no compressed gases (other analyzers require compressed
oxygen);
- no autosampler, but samples can be analyzed in the time required
to load an autosampler, and there is no potential for contamination
of samples traveling together in the sample tray;
- industry standard for Method 30B and Appendix K with about
100 units in use;
- unique application of Zeeman AA Technology prevents interference
and allows a simpler furnace design;
- operation is easy to learn, training and certification take
one day.
| Advantages
for EPA Method 7473 Thermal Analysis |
- Analyze samples from 0.2ng/g (0.2ppb) to 30,000,000ng/g (30,000ppm);
- most analyses take 90 seconds. Very high level samples take
only 8-11 minutes;
- sample Sizes up to 5g.
- versatile: analyze aqueous samples thermally down to 5ug/L
with no digestion.
- analyzer module is the finest Hg vapor monitor available,
able to detect < 2 ng/m³;
- no catalyst, gold amalgam, or drying tube, hence the analyzer
is not prone to damage from high-level or halogen contaminated
samples.
| Advantages
of Sorbent Trap System over Continuous Emissions Mercury Monitor
(CEMM) as the primary system for compliance monitoring |
- Capital and operating costs a fraction of CEMMs costs;
- mature proven technology, reliability proven by many systems
in use;
- simple, dependable, easy and inexpensive to maintain;
- the only system capable of reliably measuring low levels (<0.5
micrograms per cubic meter.) This will be critical where Mercury
Reduction is mandated.
| Advantages
of Sorbent Trap System as an additional tool for facilities equipped with CEMM |
- Can be used as a low cost back-up system during CEMMs maintenance
and repair where a loss of data can mean tens of thousands of
dollars;
- check the accuracy of your calibrators;
- perform your own RATA and pre-Rata tests;
- excellent CEMMs trouble-shooting tool;
- perform Speciation Studies using our Ohio Lumex Speciation
Traps;
- flexible for testing at different points and assessing Mercury
Reduction Schemes;
- can be used to determine mercury levels in coal, ash, and
other materials;
- perfect to reveal best optimization of Sorbent Injection Systems;
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Advantages of the Sorbent Trap System for Stack Testers |
- Much simpler to perform than Method-29 or “Ontario Hydro”
method;
- results in minutes;
- quickly categorize source levels on site;
- only collect the number of samples needed (9 versus 12 runs)
- no need to collect extra runs to assure 9 good results;
- finish RATA using method compliant results before leaving
the site;
- saves money compared to other methods or off-site analysis;
- “One-Shot” argument: both Digestion and Thermal Methods are
destructive if sample is lost on Trap Disassembly. The penalty
for on-site Thermal Analysis is merely another run.
| Comparison
with other methods |
Ohio Lumex analyzer on site:
- typical RATA in 1.5 - 2 days;
- minumal runs required (as few as 9) since data integrity can
be determined on site;
- testing team has to complete control over analysis.
Ontario Hydro method:
- 3 - 5 days required to get 12 runs;
- results analyzed off-site;
- testing must be repeated if 4 or more runs fail;
- equipment is expensive and fragile.
Sorbent traps analyzed off-site:
- must do extra runs to ensure 9 good runs (12 vs. 9);
- retesting required if 4 or more runs prove to be bad;
- impossibe to predict spike value for Field Recovery Test.
Using CEMM as an instrumental reference method:
- expensive;
- dynamic spiking is complicated to perform;
- no portable NIST Traceable Calibrator for "total"
Hg is commercially available;
- wet stacks and high particulates can cause problems.
| Testing
sites where RATA criteria was met using Appendix K Ohio Lumex
analyzer |
- Allegheny Armstrong Power Plant July 2006, WKU Tester;
- Trimble County RATA July 7- 12, 2005, Arcadis Tester;
- Reliant Energy Power March 24, 2006, EERC Tester;
- EPRI Round Robin Test, multiple locations, 2006;
- NIPSCO power plant Indiana, APEX ETV EPA verification 2006,
Battelle Tester;
- many others
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