WELCOME to the FLOX-COAL II Workshop

Transcription

1 Institute of Combustion and Power Plant Technology Prof. Dr. techn. G. Scheffknecht WELCOME to the FLOX-COAL II Workshop

2 Institute of Combustion and Power Plant Technology Prof. Dr. techn. G. Scheffknecht FLOX COAL II Development of Scale-Up Methodology and Simulation Tools for the Demonstration of PC-FLOX Burner Technology in Full-Scale Utility Boilers Max Weidmann FLOX-COAL II Workshop 14 th May 2014

3 Workshop Program 09:00 Welcome words by Prof. Dr.-Ing. Uwe Schnell 09:15 Presentation of the FLOX-COAL-II project by Max Weidmann 09:30 Overview of FLOX Applications by Dr.-Ing. Joachim Wünning 10:00 Potential of FLOX in Energy Generation by Gerry Hesselmann 10:30 Coffee Break 11:00 FLOX Burner Design and Scale-up Consideration by Angus Duncan 11:30 Optical Diagnostics at Semi-Industrial Scale for the Study of Flameless Combustion of Pulverized Coal by PhD David Honoré 12:00 Lunch Break 13:00 Modelling of Radiation in FLOX systems by Martin Habermehl 13:30 CFD Modelling of Flameless Combustion at Pilot Scale and Full Scale Applications based on Experimental Investigations by Max Weidmann 14:00 Retrofit Concept of Tangentially Fired Boiler with FLOX-COAL Burners by PhD Piotr Plaza 14:30 Discussions and Workshop Closing 16:00 Visit of IFK experimental facilities (optional) 3

4 PROJECT OVERVIEW 5

5 Project Consortium Project coordination by IFK, University of Stuttgart Project coordinators: M. Zieba (1 st half) and M. Weidmann (2 nd half) Scientific developments and measurements undertaken by Instytut Energetyki (IEn), Warsaw Institute of Heat and Mass Transfer (WSA), RWTH Aachen University Institute of Combustion and Power Plant Technology (IFK), University of Stuttgart Complexe de Recherche Interprofessionnel en Aérothermochimie (CORIA), INSA de Rouen Construction and scale-up considerations conducted by Doosan Power Systems Ltd. (DPS), Renfrew WS Wärmeprozesstechnik GmbH, Renningen Full-scale and safety issues considered by EnBW Erneuerbare und Konventionelle Erzeugung AG, Stuttgart PGE Górnictwo i Energetyka Konwencjonalna SA, Belchatów 6

6 About the FLOX-COAL-II Project First project FLOX-COAL from 2005 to 2009 (Contract No.: RFCR-CT ) Project partners: 8 Funded by the RFCS under the umbrella of Technical Group 3 (coal combustion, clean and efficient coal technologies, CO 2 capture) Contract No.: RFCR-CT Duration: starting in July 2011, finishing in June 2014 (36 months) 7

7 Project Goals and Steps The FLOX-COAL-II project aimed for a suitable scale-up methodology. simulation tools capable to predict flow fields, temperature distributions and NOx emissions from pulverized coal FLOX burners Therefore, the following steps are required: Fundamental experimental investigations of flameless combustion at pilot-scale (500kW) Development of an enhanced NOx sub-model for CFD simulations Development of an enhanced gas emissivity sub-model for CFD simulations Testing of flame supervision equipment Consideration of safety issues 8

8 Project Structure Work Package 0 WP-Leader: USTUTT Project Management Work Package 1 WP-Leader: WS Partners: USTUTT, DPS, ENBW.KWG Design of pilot-scale 0.5 MW th PC-FLOX burners Second prototype burner design 2nd 1st protoype prototype burner for for testing Work Package 2 WP-Leader: USTUTT Partners: RWTH, CORIA, DPS, WS, IEn, ENBW.KWG Pilot-scale testing 0.5 MW Simulation tools Work Package 4 WP-Leader: DPS Partners: WS, EnBW.KWG, USTUTT Development and validation of the scale-up methodology Experimental data & Validation data Work Package 3 WP-Leader: RWTH Partners: USTUTT, IEn Development, validation and integration of CFD sub-models Full-scale burner designs Work Package 5 WP-Leader: EnBW.KWG Partners: USTUTT, IEn, DPS, PGEGIEK Application of scale-up methodology and simulation tools to evaluate utility boiler concepts Simulation tools 1 st 6 Months 2 nd 6 Months 3 rd 6 Months 4 th 6 Months 5 th 6 Months 6 th 6 Months 9

9 Sum up of Performed Activities I 3 weeks of measurement campaigns at IFK s 500 kw t test rig OH* chemilumincescence imaging Laser Doppler Velocimetry Total and radiative heat flux measurements In flame measurements of gas temperature gas concentrations by FTIR Fly ash sampling Tested conditions: Air combustion, diluted air combustion, Oxy-fuel combustion Design, construction and testing of two prototype PC-FLOX burners Assessment of major scale-up rules and development of scale-up methodology: Design of full-scale FLOX burners 10

10 Sum up of Performed Activities II Development and implementation of CFD sub-models for the prediction of NOx formation and emissions the prediction of the gas emissivity Cross comparison of different CFD program codes (AIOLOS, FLUENT) Experimental investigation of char burnout and pyrolysis yields Development of safety requirements Performance of simulations of full-scale utility boilers equipped with PC-FLOX burners 11

11 Publications Related to the FLOX-COAL-II Project Duncan A., Validation of CFD Modelling for Conventional and Unconventional combustion, BFRC Spring Meeting 2013, Canterbury Weidmann M., Verbaere V., Boutin G., Honoré D., Grathwohl S., Godard G., Gobin C., Dieter H., Scheffknecht G., Experimental and computational investigation of flameless oxidation of pulverized coal at pilot-scale (230 kw th ), BFRC Spring Meeting 2013, Canterbury Weidmann M., Verbaere V., Boutin G., Honoré D., Grathwohl S., Godard G., Gobin C., Dieter H., Scheffknecht G., Detaillierte experimentelle Untersuchung der flammlosen Oxidation von Kohlenstaub (230 kw th ), 26. Deutscher Flammentag, 2013, Duisburg Gronarz, T., Habermehl, M., Weidmann, M., Kurz, D., Hatzfeld, O., Kneer, R., Scheffknecht, G., Numerische Simulation der Stickoxidbildung bei der flammlosen Verbrennung von Kohle. 26. Deutscher Flammentag, 2013, Duisburg Gövert B., Haustein H. D., Christ D., Hatzfeld O., Kneer R., Reaction rate measurements in N 2 /O 2 - and CO 2 /O 2 -atmosphere using a fluidized bed reactor, 26. Deutscher Flammentag 2013, Duisburg Weidmann, M., Verbaere, V., Boutin, G., Honoré, D., Grathwohl, S., Godard, G., Gobin, C., Dieter, H., Kneer, R., Scheffknecht, G., Detailed investigation of flameless oxidation of pulverized coal at pilot-scale (230 kw th ), Appl. Therm. Eng., 2014, Weidmann, M., Grathwohl, S., Dieter, H., Scheffknecht, G., Progress in Flameless Pulverized Coal Burner Design (300kW th ) Based on CFD Simulations and Experimental Investigations, Clearwater Clean Coal Conference, 2014, Clearwater 12

12 Project Results Detailed experimental data base of FLOX combustion at pilotscale (300 kw t ) Scale-up methodology covering the requirements of PC-FLOX burner scaling NOx sub-models capable to predict the emissions qualitatively good Progress of the PC-FLOX burner design with potential for further improvements Developed start up and shut down routines Safety strategies to be tested a bigger scales 13

13 More Infos on Our Project Website 14

14 FLOX-COAL-II Thank you for your attention! 15