SM-3 Mercury Stack Gas Monitor ENVEA
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SM-3 Mercury Stack Gas Monitor ENVEA - 1

envea Mercury Instruments Mercury Stack Gas Monitor SM-3 EMISSIONS MONITORING SYSTEMS The Mercury Stack Gas Monitor SM-3 is used for continuous monitoring of mercury in flue gas. Bound forms of mercury like HgCl2, HgO, HgS and particulate mercury are detected as well as elemental mercury. SPECIFIC FEATURES ■ Approved by TUV Germany (published in GMBI Nr. 33/1999) ■ Detects elemental, ionic and bound mercury ■ True continuous measurement (no measuring cycle) ■ No wet-chemistry, no use of reagents ■ Maintenance-free solid state catalyst ■ Measuring ranges 1 - 50; 0 - 75; 0 - 500 |jg/m3 Hg (others optional) ■ Corrosion protected, rugged construction ■ Compact size, mobile operation possible OPERATING PRINCIPLE A sample gas stream is taken from the duct through a heated sampling system. The gas is drawn through a high-temperature particulate filter and subsequently enters the reduction unit. In this part of the analyzer a thermo-catalytic reduction of ionic and bound mercury is performed. Elemental mercury vapor is formed as a result of this transformation process. The gas is then dried in a maintenance-free peltier cooler and fed to the mercury detector where the SHfl mercury concentration is measured with the so called “cold vapor atomic absorption spectroscopy (CVAAS)” method. The high surface temperature of the gas entry filter guarantees that mercury is thermally completely desorbed from particles and thus also detected. Heated sample line Probe Thermo Catalytic Converter UV Photometer with Optical Cell Sample Pump MAIN APPLICATIONS ■ Coal fired power plants ■ Cement production ■ M unicipal waste incinerators ■ Sewage sludge incinerators ■ Hazardous waste incinerators ■ Thermal soil resanitation plants ■ Wood combustors using recycled wood Metal recycling furnaces

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SM-3 Mercury Stack Gas Monitor ENVEA - 2

EASY TO OPERATE EASY TO TRANSPORT The SM-3 is operated via a waterproof membrane keypad. All inputs required are selected in a easily comprehensible menu shown on the graphical display. It is also possible to initiate functions like zero adjustment and calibration check from an external computer. Due to its compactness and low weight the SM-3 is relatively comfortable to transport. That makes it easy to use the instrument at different sampling points. THE IMPORTANCE OF CONTINUOUS MERCURY EMISSIONS MONITORING TECHNICAL SPECIFICATIONS Thermocatalytic reduction, Measuring principle: UV...

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