Aalborg Energie Technik a/s (AET) Biomass Co-generation Plant:
The CHP plant was originally built as a 100% coal-fired travelling grate unit for the supply of electricity and process heat to the pharmaceutical process. The cogeneration plant was originally commissioned in 1983.
In 2004, the boiler was re-commissioned after conversion to 100% biomass and redesigned to AET Combustion System where possible and feasible.
The CHP plant was redesigned to burn demolition wood (A1 - A4) in accordance with the requirements of the German WID.
A ChlorOut system has also been implemented via the AET SNCR DeNOx System in order to minimise fouling and corrosion at the last stage of the superheater. The ChlorOut system is rather advanced, as it is a two-step injection with dedicated sulphate liquids in order to reach a certain KCl level and reduction of emissions. The KCl level is monitored by an in-situ Alkali Chloride Monitor (IACM).
In connection with the conversion, AET has designed, engineered, procured and supplied the following: