Flue Gas/CO2 Scrubbing and Conditioning System (16 Lots)

To monitor flue gas quality for excessive CO and low O2 using an in-situ probe and to bleed in air to maintain required O2 levels or to divert from flue gas supply to air in case of combustion problems, whereby the divertor valve or a combination of a divertor and bleed valve is/are sized for an air bleed of ~1-60Nm3/h) and full air bypass up to 264N/m3.

To remove particulates, from sampled flue gas from (primarily) biomass boiler from 40mg/m3 to <65μg/m3; pressure drop should not overall exceed fan capabilities across the full gas train.

To sample 72-264Nm3/h of flue gas (on dry basis) primarily from biomass boiler through flue gas manifold pipework (~130m, 4” SS316 pipe) and filter, to the wet scrubber and demister, and downstream equipment to deliver 80-130-300 Nm3/h of humidified gas at 47±15mabr (max 137mbar) to the MCFC. Estimated pressure drops across the full gas train. (See also cathode gas skid regarding control) Optionally this also includes flue gas flow meter for the corresponding range, for example: Vortex, averaging pitot tube, or other.

To scrub: • Bioenergy flue gas downstream of flue gas diverter, filter and VSD Blower or • bulk CO2 from site supply to remove impurities to levels required by the MCFC; and with optional capacity to treat an additional 40Nm3/h of bulk CO2 for FT plant.

To dry up to 80m3/h of CO2 from the Wet Scrubber + Demister down to at least -20˚C dew point for downstream metering.

To scrub bulk CO2 from site supply to remove impurities (primarily S-containing compounds) to purity requirements of the MCFC; and with a total capacity of 80m3/h, to supply up to 40Nm3/h to the Anode and cathode gas skid + up to 40Nm3/h for FT plant.

To meter and mix component gases: CO2, N2, CA, to generate representative flue /process gas mixtures or to modulate real flue/process gases, whereby the CO2 is fed from: • the wet scrubber after demister and Dryer or • the dry scrubber or • bulk CO2 from site supply for subsequent scrubbing the wet /dry scrubber, as a standalone gas or as part of the overall synthetic/real flue/process gas mixture The skid (within its monitoring and control capability) would also meter flue gas/air flowrate and control the flue gas VSD fan as well as the inlet probe and diverter Optionally the skid will also incorporate an additional line for O2 flow metering and control for direct injection into the flue gas where O2 levels are too low , where the O2 will likely be supplied from onsite electrolysis. For emergency stop the skid should also have a separate fixed flow N2 supply (Flow setting TBC) from site services supply (7-8.5bar, 22mm, 10000L/min shared supply) for cathode supply train purge (covering Fuel cell module, cathode superheater, and recuperator.

To accurately and controllably (ramp-rates of 5-10˚C/hr, setpoint to 3 s.f.) heat-up and maintain setpoint temperatures of 80-130-300Nm3/h of humidified cathode gas (real/synthetic/modulated flue/process gas) downstream of the recuperator and humidifier, from ambient or elevated temperature when preheated by the recuperator (to up to ~600˚C), and to maintain the targe cathode inlet temperature setpoint of 590 ± 25˚C, which may require superheater exit temperatures of 640-700˚C during hot standby.

To meter and mix component gases: CO2, N2, NG, H2, to generate representative fuel gas mixtures whereby the CO2 is be fed from wet or dry scrubber. Optional recycle loop from anode exhaust. Water skid: controls equipment and instrumentation should be collocated with the anode skid due to special location of equipment

To accurately (to 3 significant figures) and controllably (ramp-rates of 5-10˚C/h) heat 6-33Nm3/h fuel gas downstream of the anode humidifier, from ambient or elevated temperature (after 20kW anode humidifier to target operating temperatures of 580 ± 25˚C or as high as 640-700 ˚C during startup or hot standby.

To provide a cat-5-type ultra-pure water supply loop system with an intermediate 1000L storage for 80 L/h at 2.8 bar (TBC) of deionised water produced from ( 2 off) onsite reverse osmosis plant (with conductivity of 0.1 μS/cm) and provide an estimated 5.5 bar pressurised supply loop for UPW skid for the MCFC and minimum 3 other applications on site: 1) ACP; 2) Electrolyser 2; 3) HP heat exchanger test bed. The MCFC supply shall also include an additional polishing stage for continuous operation with standby capacity and quality monitoring to provide up to 45L/hr with conductivity of 0.05-0.06 μS/cm. The polished UPW supply is required for the cathode steam generator or direct water injection into the recuperator and anode fuel humidifier. It is optional for filling the cathode and anode water seals.

To control the flow of ultra-pure water (UPW) from UPW supply loop to: a. cathode and anode water seals,. b. cathode steam generator for flue gas humidification with expected supply of 2-29kg/h c. cathode-anode heat exchanger, for flue gas humidification with expected supply of 2-29kg/h d. Anode humidifier for fuel gas humidification with expected supply of 1-14kg/h Whereby a) and b) are controlled by level and c) and d) require accurate water metering.

To provide system overpressure protection to protect the MCFC module and incorporating a level adjusting tank for pressure balancing with Cathode exhaust stream.

Motor control centre to provide power management and switching for all relevant BOP plant components included above and in the overall process schematic outlined in Figure 1 (excluding the MCFC module), broadly: By the MCFC - (SCR) controlled power supply to Anode superheater - (SCR) controlled power supply to Cathode superheater. - (SCR) controlled power supply to Anode humidifier /vaporiser (18.2kW in 4 x 230V single phase heaters) - (SCR) controlled power to Cathode steam generator. - Natural gas compressor - Equipment and instrumentation power across the system. - Power management for the main supply (630A) and connection of 30kW regenerative load cell to the grid - PLC power Externally by FGD (potentially as a separate panel) - FAN (VSD) - Wet scrubber system - Dry scrubber system (potentially booster) - UPW circulation loop, and - any equipment and instrumentation power associated with the above or the Cathode skid - PLC power (if required for FGD)

Optionally electrically isolated module controller to take voltage, temperature, and pressure readings from the MCFC to enable controls integration with gas supply system. (Note BOP controller is excluded)

Instrument air manifold block with in-build solenoids for control of air supply to instruments: pneumatic isolation, 3 way and control valves.

• Flue gas probe, cathode inlet mixing valve, O2 feed in skid (a-c)
• CONTRACT NOT AWARDED – NO SUCCESSFUL BIDDERS.

• Flue gas filter
• CONTRACT NOT AWARDED – NO SUCCESSFUL BIDDERS.

• Flue gas fan (a-c)
• CONTRACT NOT AWARDED – NO SUCCESSFUL BIDDERS.

• Wet scrubber and demister
• CONTRACT NOT AWARDED – NO SUCCESSFUL BIDDERS.

• CO2 dryer
• CONTRACT NOT AWARDED – NO SUCCESSFUL BIDDERS.

• Dry scrubber
• Reference: 3808/jn
• Num offers: 1
• Value: £56,580

• Cathode gas mixing skid
• Reference: 3808/jn
• Num offers: 1
• Value: £169,785

• Cathode superheater
• Reference: 3808/jn
• Num offers: 1
• Value: £56,272

• Anode gas mixing skid
• Reference: 3808/jn
• Num offers: 1
• Value: £67,267

• Anode superheater
• Reference: 3808/jn
• Num offers: 1
• Value: £38,485

• Ultra-pure water (UPW) supply loop
• Reference: 3808/jn
• Num offers: 1
• Value: £38,923

• Ultra-pure water (UPW) skid
• CONTRACT NOT AWARDED – NO SUCCESSFUL BIDDERS.

• Anode water seal
• Reference: 3808/jn
• Num offers: 1
• Value: £12,047

• MCC
• Reference: 3808/jn
• Num offers: 1
• Value: £198,198

• MCFC module instrument PLC logger
• Reference: 3808/jn
• Num offers: 1
• Value: £50,289

• Controls manifold
• Reference: 3808/jn
• Num offers: 1
• Value: £129,037