The 240kWth Biomass Grate Combustion Boiler (BGB) forms part of the integrated facilities at PACT and is interconnected to the PACT Post-Combustion Capture Plant with a flue gas slip stream supplying an equivalent of 150kWth biomass flue gas to the capture plant.
The boiler can combust a wide range of biomass fuels, from forestry residues to waste-grade materials (e.g. waste wood) on a moving grate. The chipped/pelleted fuels are stored in the large on-site silo and fed into the system via screw feeders. The system also has an integrated heat exchanger with a water buffer and it has a built-in ash cyclone. Through a connection to the CO2 capture plant, there is the possibility to explore carbon capture from waste.
The system is supported by a wide range of online analytical capabilities including metal aerosol emissions analysis by online ICP; combustion stack and FTIR gas analyser; and fast particulate analysis by a Cambustion DMS500 analyser.
The BGB is equipped with a moving grate providing homogeneous combustion with continual automatic removal of combustion residue. It can operate on a virgin and recycled/waste wood and biomass chip/pellets.
Multi-fuel feeding and blending system for up to three simultaneous fuel types enables research on additives and fuel blends to control efficiency, emissions and de-ashing.
The high-temperature post combustion zone ensures optimum combustion and supports the utilisation of lower grade fuels. Heat exchanger is equipped with tabulators for continual, automatic removal and a cyclone filter for fly ash removal. The boiler is equipped with an induced draft fan and individually controlled and metered primary air, fed under the grate, and secondary and tertiary air fed in the lower and upper combustion chamber respectively.
The system is fully automated and utilises pressure, temperature and lambda sensors for optimum combustion control and high efficiency. The combustion chamber, hot gas path, filter and exhaust are fitted with multiple sampling ports and temperature sensors, which enables detailed research of the combustion processes and emissions.
Distributed large access ports are used for a range of analytical probes including: heat flux, suction pyrometer, deposition and corrosion probes, thermal imaging camera probe and gas sampling probes for FTIR and combustion stack analyser; combustion and emission gas analysis, online metal aerosols analysis and online particulate analysis.
The combustion chamber, hot gas path, heat exchanger and exhaust are fitted with multiple sampling ports enabling detail research of the combustion process, energy efficiency and emissions. In addition to fixed thermocouples, pressure and lambda sensors, the rig utilises a range of analytical probes including: heat flux, suction pyrometer, deposition and corrosion probes and thermal imaging camera probe for flame visualisation.
INTEGRATED PILOT-SCALE FACILITIES
ONLINE ANALYTICAL CAPABILITY
SUPPORTING LAB ANALYTICAL CAPABILITY (
PACT has leading modelling capability including Ansys/Fluent, PSE/G-proms, PSE/G-CCS and Aspen and Aspen+ software and including research and commercial licenses.