Industrial machinery

Tender description

Circulating and bubbling fluidised-bed systems (CFB and BFB) are required to test new adsorbents for CO2 capture on a 5-20 kg scale using simulated and actual flue gases. The Facility is being funded by the Energy research accelerator award from the UK Government made to the University of Nottingham and other Midland Universities. It will be housed in a new building (RAD Building University of Nottingham, Jubilee Campus, Wollaton Road, Nottingham NG8 1BB) containing a purpose-built laboratory having dimensions of H 10m x W 12m x D 12m with full services, including gas supplies for compressed air, nitrogen and CO2. The scope of this tender for the proposed Facility covers the design, supplying all the components, except where otherwise specified, the installation and commissioning. Flue gas will be provided from a 25 kW biomass boiler but with also the option of using nitrogen, air and CO2 mixtures from cylinders. The overall flue gas volumetric flow rate of the boiler will be ca. 800 dm3/minute with ca. 20 and 50-200 dm3/min being required for BFB and CFB adsorber operations, respectively. The flue gas temperature will be around 120oC and it will have approximately the following composition: O2 7.0 % v/v; CO2 12-14 % v/v; CO 10 - 50 ppm; NOx = 50 - 100 ppmv and PM = 5 – 20 mg/m3. This is in accordance with ISO 17225-2 for pure wood pellets. The flue gas will first be cleaned to reduce PMs by over 95 % to less than 1 mg/m3 before being split to provide the streams for the BFB and CFB adsorber systems. Simulated flue gas (typically 15 % CO2 v/v in nitrogen) will also be supplied from cylinders and it is anticipated these will be used for the BFB adsorber requiring a low flow rate. Both systems will use a BFB for regeneration. There is no intention to run both systems simultaneously, so only a single gas feed are required. Note that hot water from the biomass boiler can be used for low temperature heating. If minimum fluidisation velocities are high for any adsorbents which would result in short gas residence times in the CFB, the BFB adsorber will be used. The aim is simply to test adsorbents at scale and it is not required to achieve complete heat integration so electric heating can be used for the BFB regenerators and the gas entering the adsorber. The furnaces used should be split to allow rapid cooling upon opening and multiple zones are preferable to facilitate precise temperature control. An electric steam generator (Fulton 9kW Mini-Compack Electric Steam Boiler rated at 13.5kg/h (F&A 100oC) at an operating pressure of 5.8 barg) is also available for heating.