External heat integration of energetically optimized Ca-looping configurations

Transcription

1 External heat integration of energetically optimized Ca-looping configurations Y. Lara, A. Martínez, P. Lisbona, L.M. Romeo CIRCE Building / Ebro River Campus / Mariano Esquillor Gómez, 15 / ZARAGOZA Tfno. (+34) / Fax (+34) / web: / circe@fcirce.es

2 Ca-looping Group at CIRCE Calcium looping Group at CIRCE Available heat and energy requirements in the Ca-looping cycle Optimized Ca-looping configurations External heat integration Conclusions

3 Calcium looping Group at CIRCE Monitoring, optimization and control Analysis and diagnosis of thermal processes Thermal, solar, cogeneration plants Zero Emissions Area utilization/power to Gas capture Oxy-combustion processes Amine-impregnated alumina sorbents

4 Calcium looping Group at CIRCE Cold flow Hydrodynamics Experimental work 300 kwt CENIT CO2/MENOS CO2 Computational simulation Process improvement Energy integration

5 Calcium looping Group at CIRCE 2 connected CFBs Cold flow facility 4 m height / Ø mm Gs measurement by pressure drop in cyclone or riser upper part Hydrodynamic models of single CFB and dual CFBs h [m] 4 3,5 3 2,5 2 1,5 1 CR F-LS CL B-LS 0, Δp [mbar]

6 Calcium looping Group at CIRCE 300 kw th biomass Ca-L plant La Robla, León (Spain) Consorcio Estratégico Nacional en Investigación Técnica del Plant design Funded by the Spanish Ministry of Industry, Tourism and Trade Partners: ENDESA, Unión Fenosa, Foster Wheeler, CIEMAT, CSIC, Experimental work Procesos de reducción, captura y fijación de en centrales térmicas convencionales Funded by the Spanish Ministry of Industry, Tourism and Trade Partners: ENDESA, Gas Natural Fenosa, Inerco, Duro Felguera, INCAR-CSIC

7 Calcium looping Group at CIRCE Process analysis and improvement Optimization of operation parameters (ff pp, RR) Economical assessment Enhanced sorbents and costs augmentation Clean valorization of waste coal by Ca-based multi-capture

8 Calcium looping Group at CIRCE External energy integration Industrial symbiosis Integration with a power plant and a cement plant

9 Available heat and energy requirements in the Ca-looping cycle Available heat and energy requirements in the Ca-looping cycle Optimized Ca-looping configurations External heat integration Conclusions

10 Available heat clean conditioning CARBONATOR CALCINER CaCO 3 Coal flue purge O 2 ASU

11 Available heat clean Q CR 650 ºC Q CL 950 ºC conditioning 650 ºC Q CR CARBONATOR 950 ºC Q LS CALCINER CaCO 3 Coal flue Q purge O 2 ASU

12 Energy requirements clean conditioning CARBONATOR CALCINER CaCO 3 Coal flue purge O 2 ASU

13 Energy requirements clean conditioning CARBONATOR CALCINER Sorbent regeneration flue purge O 2 ASU

14 Energy requirements clean conditioning CARBONATOR CALCINER Solids heating up Sorbent regeneration flue purge O 2 ASU

15 Energy requirements clean Q CL conditioning CARBONATOR Q LS CALCINER Solids heating up Sorbent regeneration flue purge O 2 ASU

16 Energy requirements clean Q CL conditioning CARBONATOR Q LS CALCINER Solids heating up Sorbent regeneration flue purge O 2 ASU

17 Energy requirements clean Q CR Q CL conditioning Q CR CARBONATOR Q LS CALCINER CaCO 3 Coal flue Q purge O 2 ASU

18 Energy requirements clean Q CR Q CR CARBONATOR reduction of the heat available for CaCO 3 flue Q CL Q LS energy recovery Coal Q purge CALCINER O 2 ASU conditioning The efforts oriented to minimize energy consumption in the calciner lead to a

19 Analysis Technological solutions for the internal heat integration and the subsequent external integration of their available energy flows are performed and compared Three Ca-looping configurations have been modelled, and their amounts of heat available for external integration quantified A heat exchanger network has been designed for each configuration, to power a supercritical steam cycle The results have been analyzed in terms of fuel consumption reduction, recovered energy and power production

20 Optimized Ca-looping configurations Available heat and energy requirements in the Ca-looping cycle Optimized Ca-looping configurations External heat integration Conclusions

21 Optimized Ca-looping configurations Possibilities clean Q CL conditioning CARBONATOR Q LS CALCINER CaCO 3 Coal flue purge O 2 ASU

22 Optimized Ca-looping configurations clean Q CL Cyclonic preheater conditioning A mature technology CARBONATOR CALCINER CaCO 3 Coal flue purge O 2 ASU

23 Optimized Ca-looping configurations clean Q CL Cyclonic preheater conditioning A mature technology CARBONATOR flue 2 steps of cyclones CALCINER CaCO 3 Coal purge O 2 ASU 6.5% reduction of generation 13% reduction of specific coal and O 2 consumption Martínez A, Lara Y, Lisbona P, Romeo LM. Environmental Science & Technology 47 (2013)

24 Optimized Ca-looping configurations Mixing seal valve Innovative and promising clean conditioning CARBONATOR Q LS CALCINER CaCO 3 Coal flue purge O 2 ASU

25 Optimized Ca-looping configurations Mixing seal valve Innovative and promising clean conditioning flue CARBONATOR 2 exits 2 aeration es CALCINER CaCO 3 Coal purge 7.4% reduction of generation 15% reduction of specific coal and O 2 consumption O 2 ASU Martínez A, Lara Y, Lisbona P, Romeo LM. Energy & Fuels 28 (2014)

26 External heat integration Available heat and energy requirements in the Ca-looping cycle Optimized Ca-looping configurations External heat integration Conclusions

27 External heat integration Título capítulo Reference case Cyclonic preheater Mixing seal valve

28 External heat integration Título capítulo Shifted Temperature (ºC) Reference case Cyclonic preheater 15% reduction of the available heat for external integration Heat flow (MW) Mixing seal valve 17% reduction of the available heat for external integration

29 External heat integration Título capítulo Are cold streams left? YES Rank hot and cold streams NO HEN finished Select C at highest Tª Exchange hottest H with C YES Hot stream exhaust C? Match (C) NO Match (C) Check A Check B NO NO Is C exhausted? YES C special? A Exchange A B Exchange B No exhausted streams Exchange C with highest CP A & B C=starred YES Compare configuration C with stored B Exchange B Store B Exchange A NO NheB<NheA? YES Update to B Lara Y, Lisbona P, Martínez A, Romeo LM. Fuel 127 (2014) 4-12

30 External heat integration Título capítulo 15 Heat exchangers 1256 MW th 99,98% recovered heat Reference case 15 Heat exchangers 1078 MW th 99,95% recovered heat Cyclonic preheater 14 Heat exchangers 1036 MW th 99,95% recovered heat Mixing seal valve

31 Conclusions Available heat and energy requirements in the Ca-looping cycle Optimized Ca-looping configurations External heat integration Conclusions

32 Conclusions Fuel and O 2 consumption are reduced in the cyclonic preheater and mixing seal valve configurations Cyclonic preheater and mixing seal valve configurations dimensions are lower than ordinary configuration Global efficiency is similar in all three configurations A priori, both configurations seems to be adequate and an economic analysis is required

33 THANK YOU VERY MUCH FOR YOUR ATTENTION Tel.: [+34] This work is supported by the R+D Spanish National Program from MINECO (Spanish Ministry of Economy and Competitiveness) under project ENE R.