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CIRCE Building / Ebro River Campus / Mariano Esquillor Gómez, 15 / 50018 ZARAGOZA
Tfno. (+34) 976 761 863 / Fax (+34) 976 732 078 / web: www.fcirce.es / email: [email protected]
External heat integration of energetically optimized Ca-looping configurations
Y. Lara, A. Martínez, P. Lisbona, L.M. Romeo
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
Calcium looping Group at CIRCE
Monitoring, optimization and control Analysis and diagnosis of thermal processes
CO2 utilization/Power to Gas
CO2 capture
Zero Emissions Area
Thermal, solar, cogeneration plants
Oxy-combustion processes
Amine-impregnated alumina sorbents
Calcium looping Group at CIRCE
Experimental work
Computational simulation
Cold flow Hydrodynamics
300 kWt CENIT CO2/MENOS CO2
Process improvement
Energy integration
Calcium looping Group at CIRCE
Cold flow facility
2 connected CFBs
4 m height / Ø 170-160 mm
Gs measurement by pressure drop in cyclone or riser upper part
Hydrodynamic models of single CFB and dual CFBs
0
0,5
1
1,5
2
2,5
3
3,5
4
1010 1020 1030 1040 1050 1060 1070 1080
h [m
]
Δp [mbar]
CRF-LSCLB-LS
Calcium looping Group at CIRCE
300 kWth biomass Ca-L plant
Plant design Consorcio Estratégico Nacional en Investigación Técnica del CO2
Funded by the Spanish Ministry of Industry, Tourism and Trade Partners: ENDESA, Unión Fenosa, Foster Wheeler, CIEMAT, CSIC, …
La Robla, León (Spain)
Experimental work Procesos de reducción, captura y fijación de CO2 en centrales térmicas convencionales
Funded by the Spanish Ministry of Industry, Tourism and Trade Partners: ENDESA, Gas Natural Fenosa, Inerco, Duro Felguera, INCAR-CSIC
Calcium looping Group at CIRCE
Process analysis and improvement
Optimization of operation parameters (𝑓𝑓𝑝𝑝,𝑅𝑅)
Clean valorization of waste coal by Ca-based multi-capture
Enhanced sorbents and costs augmentation Economical assessment
Calcium looping Group at CIRCE
External energy integration
Integration with a power plant and a cement plant
Industrial symbiosis
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
Available heat
flue gas
purge
O2
CaCO3
Coal
clean gas CO2
CA
RBO
NA
TOR
CA
LCIN
ER
ASU
CO2 conditioning
Available heat
flue gas
CaCO3
Coal
clean gas CO2
QCR
QgasCR QgasCL
QLS
CA
RBO
NA
TOR
CA
LCIN
ER
≤ 650 ºC
650 ºC
≤ 950 ºC
≤ 950 ºC
CO2 conditioning
Qpurge
O2
ASU
ASU
CO2 conditioning
Energy requirements
flue gas
CaCO3
Coal
clean gas CO2
CA
RBO
NA
TOR
CA
LCIN
ER
purge
O2
CO2 conditioning
Energy requirements
flue gas
clean gas CO2
CA
RBO
NA
TOR
CA
LCIN
ER
Sorbent regeneration
purge
O2
ASU
CO2 conditioning
Energy requirements
flue gas
clean gas CO2
CA
RBO
NA
TOR
CA
LCIN
ER
Solids heating up
Sorbent regeneration
purge
O2
ASU
CO2 conditioning
Energy requirements
flue gas
clean gas CO2
CA
RBO
NA
TOR
Solids heating up
Sorbent regeneration
QgasCL
QLS CA
LCIN
ER
purge
O2
ASU
CO2 conditioning
Energy requirements
flue gas
clean gas CO2
CA
RBO
NA
TOR
Solids heating up
Sorbent regeneration
QgasCL
QLS
purge
O2
ASU
CA
LCIN
ER
Energy requirements
flue gas
CaCO3
Coal
clean gas CO2
QCR
QgasCR QgasCL
QLS
CA
RBO
NA
TOR
CA
LCIN
ER
CO2 conditioning
O2
ASU
Qpurge
O2
ASU
Qpurge
Energy requirements
flue gas
CaCO3
Coal
clean gas CO2
QCR
QgasCR QgasCL
QLS
CA
RBO
NA
TOR
CA
LCIN
ER
CO2 conditioning
The efforts oriented to minimize energy consumption in the calciner lead to a reduction of the heat available for
energy recovery
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
Analysis
Optimized Ca-looping configurations
Available heat and energy requirements in the Ca-looping cycle
Optimized Ca-looping configurations
External heat integration
Conclusions
Optimized Ca-looping configurations
flue gas
CaCO3
Coal
clean gas CO2
QgasCL
QLS
CA
RBO
NA
TOR
CA
LCIN
ER
CO2 conditioning
Possibilities
purge
O2
ASU
Optimized Ca-looping configurations
flue gas
CaCO3
Coal
clean gas CO2
QgasCL
CA
RBO
NA
TOR
CA
LCIN
ER
CO2 conditioning
Cyclonic preheater
purge
O2
ASU
A mature technology
flue gas
CaCO3
Coal
clean gas CO2
QgasCL
CA
RBO
NA
TOR
CA
LCIN
ER
Optimized Ca-looping configurations
CO2
CO2 conditioning
Cyclonic preheater
purge
O2
ASU
6.5% reduction of CO2 generation
13% reduction of specific coal and O2 consumption
2 steps of cyclones
A mature technology
Martínez A, Lara Y, Lisbona P, Romeo LM. Environmental Science & Technology 47 (2013) 11335-41
Optimized Ca-looping configurations
Mixing seal valve
flue gas
CaCO3
Coal
clean gas CO2
QLS
CA
RBO
NA
TOR
CA
LCIN
ER
CO2 conditioning
purge
O2
ASU
Innovative and promising
flue gas
CaCO3
Coal
clean gas CO2
CA
RBO
NA
TOR
CA
LCIN
ER
Optimized Ca-looping configurations
Mixing seal valve
CO2 conditioning
purge
O2
ASU
7.4% reduction of CO2 generation
15% reduction of specific coal and O2 consumption
Innovative and promising
2 exits 2 aeration
gases
Martínez A, Lara Y, Lisbona P, Romeo LM. Energy & Fuels 28 (2014) 2059-68
External heat integration
Available heat and energy requirements in the Ca-looping cycle
Optimized Ca-looping configurations
External heat integration
Conclusions
Título capítulo External heat integration
Cyclonic preheater
Mixing seal valve
Reference case
Título capítulo External heat integration
0
100
200
300
400
500
600
700
800
900
1000
0 500 1000 1500
Shift
ed T
empe
ratu
re (º
C)
Heat flow (MW)
Cyclonic preheater
Mixing seal valve
Reference case
17% reduction of the available heat for
external integration
15% reduction of the available heat for
external integration
Título capítulo External heat integration
Rank hot and cold streams
Are cold streams
left?
NO
YES
Select C at highest Tª
Match (C)
Is C exhausted?
NO
YES
C special? NO
Compare configuration C with stored B
NheB<NheA? NO
Update to B
HEN finished
YES
YES
NO
YES
Check A Check B
Exchange A
Exchange hottest H with C
A & B A B No exhausted streams
Exchange B Exchange C with highest CP C=starred
Exchange B Store B
Exchange A
Match (C) Hot stream exhaust C?
Lara Y, Lisbona P, Martínez A, Romeo LM. Fuel 127 (2014) 4-12
Título capítulo External heat integration
15 Heat exchangers
15 Heat exchangers
1256 MWth
1078 MWth
14 Heat exchangers
1036 MWth
99,98% recovered heat
99,95% recovered heat
99,95% recovered heat
Reference case
Cyclonic preheater
Mixing seal valve
Conclusions
Available heat and energy requirements in the Ca-looping cycle
Optimized Ca-looping configurations
External heat integration
Conclusions
Fuel and O2 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
Conclusions
Tel . : [+34] 976 761 863 · c [email protected] www.fcirce.es
T H A N K YO U V E RY M U C H F O R YO U R AT T E N T I O N y l a r a @ f c i r c e . e s
This work is supported by the R+D Spanish National Program from MINECO (Spanish Ministry of Economy and Competitiveness) under project ENE2013-45353-R.