external heat integration of energetically optimized ca...

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

[email protected]

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


Experimental work

Computational simulation

Cold flow Hydrodynamics

300 kWt CENIT CO2/MENOS CO2

Process improvement

Energy integration


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


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


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


External energy integration

Integration with a power plant and a cement plant

Industrial symbiosis

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


purge

O2

ASU

CO2 conditioning

Energy requirements

flue gas

clean gas CO2

CA

RBO

NA

TOR

Solids heating up


QgasCL

QLS CA

LCIN

ER

purge

O2

ASU

CO2 conditioning

Energy requirements

flue gas

clean gas CO2

CA

RBO

NA

TOR

Solids heating up


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





Conclusions


flue gas

CaCO3

Coal

clean gas CO2

QgasCL

QLS

CA

RBO

NA

TOR

CA

LCIN

ER

CO2 conditioning

Possibilities

purge

O2

ASU


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


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

http://pubs.acs.org/doi/abs/10.1021/es401601k


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


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

http://pubs.acs.org/doi/abs/10.1021/ef402487e





Conclusions

Título capítulo External heat integration

Cyclonic preheater

Mixing seal valve

Reference case


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


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

http://www.sciencedirect.com/science/article/pii/S0016236113009058


15 Heat exchangers

15 Heat exchangers

1256 MWth

1078 MWth

14 Heat exchangers

1036 MWth

99,98% recovered heat



Reference case

Cyclonic preheater

Mixing seal valve

Conclusions




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.

external heat integration of energetically optimized ca...

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