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Fundación Ciudad de la Energía CIUDEN

Ponferrada 9th to 13th September 2013

Organised by: Hosted by:

CO2 Compression & Purification Unit Integration in an Oxy-combustion plant

CIUDEN Ponferrada, 9th – 13th September 2013

CO2 Compression & Purification Unit Integration in an Oxy-combustion plant

J. Ramosa, M.A. Delgadoa, B. Navarretea, L.A. Lópeza, J. Ovallea

I. Isidorob

F. Lockwoodc

aFundación Ciudad de la Energía – CIUDEN, Spain; b Isolux Corsán, Spain; cAir Liquide, France

CONFIDENTIAL

CIUDEN Ponferrada, 9th – 13th September 2013 CIUDEN Ponferrada, 9th – 13th September 2013

Introduction

Results

Boiler & CPU integration

CO2 balance in the CPU

Upcoming activities

Conclusions


Introduction (I)

Milestones accomplished with the CPU

OPERATION ≈ 2,500 hours

MACPLUS Project < Mar. ´13

EEPR Project < Dec. ´12

Provisional acceptance < Sep. ´12


Introduction (II)

The concept of BOILER / CPU integration

BOILER FGR CPU STACK


Introduction (III) The concept of BOILER / CPU integration

BOILER FGR CPU STACK


Introduction

Results



Upcoming activities

Conclusions


Results: boiler & CPU integration (I)

Case study

- 3 mbarg

Closed


Results: boiler & CPU integration (II) Normal operation:

0

1000

2000

3000

4000

5000

6000

7000

0

5000

10000

15000

20000

25000

Time (12 h)

Flue

gas

flow

in

let C

PU (N

m^3

/h)

Flue

gas

flow

o

utle

t boi

ler (

kg/h

)

Flow boiler outlet before recirculation Flow CPU inlet


Results: boiler & CPU integration (III)

0

1000

2000

3000

4000

5000

6000

-4

-3

-2

-1

0

1

2

3

4

Flue

gas

flow

inle

t CPU

(Nm

^3/h

)

Stac

k va

vle

posi

tion

(%)

Time (12 h)

Set point CPU battery limit pressure (mbarg)

CPU batery limit pressure (mbarg)

Stack valve position (%)

Flue gas flow inlet CPU (Nm^3/h)

CPU

bat

tery

lim

it p

ress

ure

(mba

rg)

Normal operation:


Results: boiler & CPU integration (IV) CPU trip:

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

0

5000

10000

15000

20000

25000

Time

Flue

gas

flow

in

let C

PU

Flue

gas

flow

o

utle

t boi

ler (

kg/h

)

Flow boilet outlet before recirculation Flow CPU inlet


CPU trip:

-4

0

4

8

12

Stac

k va

vle

posi

tion

(%)

Time

Stack valve position (%)

-6000

-4000

-2000

0

2000

4000

-4

1

6

11

16

21

26

31

Flue

gas

flow

inle

t CPU

(Nm

^3/h

)

Set point CPU battery limit pressure (mbarg)

CPU battery limit pressure (mbarg)

Flue gas flow inlet CPU (Nm^3/h)

CPU

bat

tery

lim

it p

ress

ure

(mba

rg)

Results: boiler & CPU integration (V)


Introduction

Results



Upcoming activities

Conclusions


Results: CO2 balance in the CPU (I) Warm part vs. cold part


Results: CO2 balance in the CPU (II)

≈ 7 % (mainly H20)

Warm part


Results: CO2 balance in the CPU (III)

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

20.0

H2O

com

posi

tion

(% v

)

Test Code

H2O inlet scrubber

H20 outlet scrubber

H20 outlet condenser

H2O outlet dryers

≈ 12 %

Nevertheless, the H2O balance indicates...


Results: CO2 balance in the CPU (IV)

P < Patm

Air infiltration in the CPU


Results: CO2 balance in the CPU (V) Air infiltration in the CPU

Delta P (mbarg)

Infiltration percentage (%)

Air infiltration (kg/h)

-100.0

-50.0

0.0

50.0

100.0

150.0

200.0

-64.0 -27.2 -17.2

4 3

3

193 163

120

Delta

P (m

barg

) / In

filtr

atio

n pe

rcen

tage

(%) /

Infil

trat

ion

(kg/

h)

Flow rate of flue gases (Nm^3/h)

4082.5 3392.5 3397.2 Delta P (mbarg) -64.0 -27.2 -17.2 Infiltration percentage (%) 4 3 3 Air infiltration (kg/h) 193 163 120


Results: CO2 balance in the CPU (VI)

∆P = P2 – P1

Air infiltration in the CPU

P1

P2


Introduction

Results



Upcoming activities

Conclusions


Upcoming activities

To increase the measurement points for O2 and CO2 across the unit

To characterize scrubber effluents separately from each column

To further analyse and optimise behaviour of the cold part


Introduction

Results



Upcoming activities

Conclusions


Conclusions

To study other unit configurations

Recovery rate could be further optimised (e.g. limit air ingress, optimise purges,..)

SO2 scrubber has shown to work well, managing the variations in SO2 content upstream

Control philosophy of an integrated plant has been tested succesfully


Acknowledgement

Part of the research work presented in this paper is co-financed

by the European Union´s European Energy Programme for

Recovery

(EEPR09 – CCS- COMPOSTILLA Project under the Agreement Number

ENER/SV/323/EEPR 2010/SI2.559733).


THANK YOU VERY MUCH FOR YOUR ATTENTION

For further information, please contact

Miguel Angel Delgado, [email protected]

mailto:[email protected]

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