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. EXAMPLE APPLICATIONS: BECCS research on biomass chip and pellet, including wood waste Fuel development, blending and fuel screening research Emissions research from waste fuel
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.
Supporting Facilities 25kW Combustion Rig 350kW Gas/Liquid Furnace 250kW Rotary Filter Furnace 300kW Fluidised Bed Combustor INTEGRATED PILOT-SCALE FACILITIES PACT Post Combustion Capture plant for integrated PCC research Gas mixing skid for modulation of flue gas/FGR composition and/or enriched air combustion Steam package boiler for steam injection ONLINE ANALYTICAL CAPABILITY On-line FTIR gas analysis: FTIR analysis system enabling simultaneous analysis of typically 20-25 components (CO2, CO, NO2, SO2, HCl, unburned hydrocarbons, …, and O2 ) in the gaseous phase with a wave number range of 400-8000cm-1 . Combustion Gas Analyser system: The FTIR gas analysis system is complemented by conventional 3‑point Servomex combustion gas analysis system. Cambustion DMS500 MKII Fast Particulate Analyser: for online analysis of particulates in flue gas, generating real time particle size, number and mass spectra SUPPORTING LAB ANALYTICAL CAPABILITY ( PerkinElmer® TG, TG-IR, TG-MS: thermogravimetric analysis coupled with emission gas analysis by FTIR and/or Mass Spectrometry for fuels and ash analysis CHNS Elemental Analyser for solids, liquids, volatile and viscous samples. SEM, SEM-EDX, XRF and other specialist facilities for ash or deposit analysis available through host university services. ) MODELLING 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. Analytical Facilities Metal emissions monitoring laboratory (ICP) Particle emissions analyser Online Monitoring and Analysis Analytical Labs
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