Mercury emissions from polish pulverized coalfired boiler

The current paper presents the research results carried out at one of Polish power plants at a pulverized hard coal-fired 225 MW unit. The research was carried out at full load of the boiler (100% MCR) and focused on analysis of mercury content in the input fuel and limestone sorbent for wet flue ga...

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Published in:E3S web of conferences 2017-01, Vol.14, p.2008
Main Authors: Wichliński, Michał, Wielgosz, Grzegorz, Kobyłecki, Rafał
Format: Article
Language:English
Subjects:
Boilers
Combustion products
Downstream
Electric power generation
Electrostatic precipitators
Emissions
Exhaust gases
Flue gas
Flue gas desulfurization
Fly ash
Full load
Gypsum
Limestone
Mercury
Mercury (metal)
Mercury vapor
Power plants
Precipitators
Pulverized coal
Slag
Solids
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Wielgosz, Grzegorz
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description The current paper presents the research results carried out at one of Polish power plants at a pulverized hard coal-fired 225 MW unit. The research was carried out at full load of the boiler (100% MCR) and focused on analysis of mercury content in the input fuel and limestone sorbent for wet flue gas desulfurization (FGD) system, as well as investigation of mercury content in the combustion products, i.e. fly ash, slag, FGD product (gypsum) and FGD effluents (waste). Within the framework of the present study the concentration of mercury vapor in the exhaust gas was also investigated. The analysis was performed using Lumex RA-915+ spectrometer with an attachment (RP-91C). The measurements were carried out at three locations, i.e. before the electrostatic precipitator (ESP), downstream the ESP, and downstream the wet FGD plant. Design of the measurement system allowed to determine both forms of mercury in the flue gas (Hg0 and Hg2+) at all measurement locations.Based on the measurement results the balance of mercury for a pulverized coal (PC) boiler was calculated and the amount of mercury was assessed both in the input solids (fuel and sorbent), as well as the gaseous and solids products (flue gas, slag, ash, gypsum and FGD waste).
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subjects Boilers
Combustion products
Downstream
Electric power generation
Electrostatic precipitators
Emissions
Exhaust gases
Flue gas
Flue gas desulfurization
Fly ash
Full load
Gypsum
Limestone
Mercury
Mercury (metal)
Mercury vapor
Power plants
Precipitators
Pulverized coal
Slag
Solids
title Mercury emissions from polish pulverized coalfired boiler
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