In biomass combustion plants (Pth < 5 MW), hot, dust-laden flue gases are generated, which frequently also include gaseous pollutants such as, SO2, NOX and HCl. The steady updating of the pollutant limit values requires the development of a more efficient flue gas cleaning technology. Methods available on the market for the flue gas purification of all components to be considered are not yet economically viable for biomass combustion plants < 5 MWth. Within the research project “SCRCOAT”, which is financially supported by the Federal Ministry of Economics and Technology (BMWi), new ways of designing gas purification systems for biomass combustion plants with a thermal output of < 5 MW have been developed.
For this reason, an existing test rig at the Paderborn University was extended. A catalytically coated fabric material (filter blank diameter = 100 mm) enables the combination of dust filtration with fabric filters and selective catalytic reduction (SCR) of NOX. The dust is deposited on the outer surface of the filter element and then the nitrogen oxide reduction on the catalytically coated inside. First, the deposition of noxious gases was investigated. This means that the pellet boiler (Pth = 15 kW) remained off and thus the fine dust was not considered. The aim was to investigate the dependence of the deposition of noxious gases (NOX, HCl, SO2) on the precise dosage of these gases and on the precoat material used in the laboratory test rig. Due to the defined addition of the abovementioned noxious gases, various operating states could be simulated...
Session: G3 - Gas and Particle Separation
Day: 22 October 2019
Time: 16:45 - 18:00 h