Evaluating the way that cez makes technology decisions thorough insight ... · Evaluating the way that cez makes technology decisions thorough insight into their latest decision making

Evaluating the way that cez makes

technology decisions thorough

insight into their latest decision

making process

international power summit forum, Munich , germany

20 February 2014

Jan Žižka

Head of Coal and Hydro Engineering

ČEZ, a.s.

CONTENT

1. CEZ INTRODUCTION – POWER PLANTS PORTFOLIO

2. LEGAL REQUIREMENTS – IED

3. THEORY – NOx EMISSIONS REDUCTION

4. PILOT PROJECT: 2010

5. LEGAL REQUIREMNTS - UPDATE

6. PORTFOLIO PROJECTS : 2014 – 2015

7. LEGAL REQUIREMENTS - BREF/BAT

8. SUMMARY

1

CEZ COAL POWER PLANTS PORTFOLIO

2

Coal Power Plants – the Czech rep.

Mělník I 6 x 60 MW

Mělník II 2 x 110 MW

Mělník III 1 x 500 MW

Počerady 5 x 200 MW

Prunéřov I 4 x 110 MW

Prunéřov II 5 x 210 MW

Tušimice 4 x 200 MW

Hodonín 4 x 55 MW

Ledvice II 2 x 110 MW

Ledvice III 1 x 110 MW

Dětmarovice 4 x 200 MW

Poříčí 3 x 55 MW

Tisová I 3 x 55 MW

Tisová II 1 x 100 MW

Total 6 157 MW

Coal Power Plants - abroad

Poland

Skawina 592 MW

Elcho 238 MW

Bulgaria

Varna 6 x 210 MW

Total 2 090 MW

ČEZ Group Total – 8 247 MW

CEZ POWER PLANTS PORTFOLIO

REFURBISHMENT / NEW BUILDS

Power Plant Tusimice 4 x 200 MW in operation

Power Plant Prunéřov 3 x 250 MW, in construction

Power Plant Ledvice 1 x 660 MW, in operation from 2014

Power Plant Pocerady (CCGT) 1 x 880 MW, in operation from 2014

3

LEGAL REQUIEREMENTS - IED

4

Directive 2010/75/EU – LCP ELVs

ALMOST ALL OF CEZs POWER PLANTS :

Requirement for flue gases:

NOx – 200 mg/m3

SOx – 200 mg/m3

TZL – 20 mg/m3

FROM January 1st, 2016

THEORY - NOx EMISSIONS REDUCTION

5

Primary measures to reduce NOx emissions

BAT Reference document for the LCP – Overview of PM for reducing NOx emissions


Secondary measures to reduce NOx emissions

• Selective catalytic reduction (SCR)

• Selective non catalytic reduction (SNCR)

• Combined SNCR + SCR

The SCR process is based on the reduction of NOx to nitrogen in a catalytic bed by

reaction with ammonia or urea (in general aqueous solution) at an optimum operating

temperature of around 300 – 450 ˚C. A higher NOx reduction is achived with the using of

higher amounts of catalyst layers.

The SNCR process is based on the reduction of NOx to nitrogen by reaction with

ammonia or urea at a high temperature. The operating temperature window is maintained

between 900 and 1050 ˚C for optimal reaction.

6


Secondary measures - SCR

7


Secondary measures - SNCR

8


Secondary measures – combined SNCR + SCR

9

PILOT PROJECT - 2010

POWER PLANT PRUNÉŘOV 2, UNIT 22

Supplier: ALSTOM

Price: 340 mil. CZK (13.5 mil Eur)

Scope of agreement:

• to decrease NOx emission from cca 500 mg/m3 under 200 mg/m3:

• By primary measures under:

• 290 mg/m3 max. load

• 370 mg/m3 min. load

• By secondary measures under:

• 200mg/m3 (by SNCR as a option)

Evaluation of offers – criterion:

• the higest NPV with unit operation till 2023

Implementation: 1/4/ 2010 - 24/3/2011 (PAC)

10



Primary measures:

Mills modification, new burners OFA 1 (grey) OFA 2 (blue)

Flue gas recirculation

11



Calculation of NPV – key inputs:

• CAPEX of project

• OPEX

• Unit efficiency

• O2 concentration

• Flue gas temperature

• Temperature of superheated and reheated steam

• Unburnts in slag

• Unburnts in fly ash

• Change of electricity consumption

• Material consumption:

• Consumption of urea

• Consumption of water

12

PORTFOLIO PROJECTS - PLAN

Reduction of NOx emissions:

• Power plant Dětmarovice - boilers 3 and 4

• Power plant Tisová - boiler 9

• Power plant Počerady - boilers 2 and 5

• Power plant Počerady - boilers 3 - 4

• Power plant Mělník - boilers 9 and 10

• Power plant Chvaletice - boilers 3 and 4 (PP sold to a new owner)

• Power plant Trmice - boilers 1,2,4,6 and 7, DESOx intensification

• Energotrans (EMĚ 1) - boilers 1 - 6

TOTAL CAPEX: cca 5,1 mld. CZK (204 mil EUR)

13

SUBSIDY PROGRAMME – STRUCTURAL EUROPEAN

UNION FUNDS

14

Identified opportunity to ask for funding – Environmental protection programme

Opportunity to fund 40 % of project CAPEX

Application for funding includes:

- Feasibility study

- Energy audit

- Evaluation by local scientific person in energy industry

Final invoice of project has to be delivered till June 30th, 2015

LEGAL REQUIEREMENTS - UPDATE

15

IED flexibilities in apllying LCP ELVs

TRANSITIONAL PERIODS

• TNP option until June30th, 2020

• opt out possible if <17 500 hours 1st January, 2016 – December, 31th 2023

• small isolated systems: till December 31th, 2019

• some district heating plants: till December 31th, 2022

OTHER FLEXIBILITIES:

• peak load plants (<1500 h/y)

• plants firing solid indigenous fuels: SO2 ELV may be replaced by min.

desulphurisation rates

LEGAL REQUIEREMENTS - UPDATE

Transitional National Plan (TNP)

Existing plants: from 1st January 2016 until 30th June 2020 MS may choose to apply TNP

Limit of generation defined by amount of emissions in year (with current ELVs)

16

Czech Republic

PORTFOLIO PROJECTS 2014 - 2015

Reduction of NOx emissions:

• Power Plant Dětmarovice - boilers 3 and 4

• Power Plant Tisová - boiler 9 (canceled)

• Power Plant Počerady - boilers 2 - 5

• Power Plant Počerady - boilers 3 - 4

• Power Plant Mělník - boilers 9 and 10 (canceled)

• Power Plant Trmice - boilers 1,2,4,6 and 7 (canceled)

• Energotrans (EMĚ 1) - boilers 1 - 6

TOTAL CAPEX: cca 1.7 mld. CZK (68 mil EUR)

17

CEZ COAL POWER PLANTS PORTFOLIO

POWER PLANT DĚTMAROVICE – UNIT 3, 4

(IED – NOx goals: max 200 mg/Nm3)

Final solution: PM + SCR

18

částečkami)

nad vyzdívkou vodou ředitelný povlak (odolnost snad až do 1900°C, s kovovými částečkami)

SCR

Modification of boiler back part

• Economiser split in 2 parts for

SCR instalation

Parametres

• NOx – max. 200 mg/Nm3

• CO – max. 50 mg/Nm3

• NH3 slip – max. 5 ppm

Implementation: 2014 - 2015


POWER PLANT DĚTMAROVICE – UNIT 3, 4


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BIDS Primary measures Secondary measures

Co A

- Burners outlet modificatin

- OFA 1 modification , new OFA 2

- Ball mills modification, new classifiers

- New coal powder distribution

- Burners sealing modification

SNCR + SCR

- Urea injection in 2 levels, 16 inlets each level

- Combustion chamber temperature distribution measurement

- Catalyst (1 layer behind economiser)

Co B

- Hot flue gas recirculation

- OFA modificaton

- Powder duct modification between mill and boiler


SNCR + SCR


- Measurement of temperature distribution in combustion

chamber

- Catalyst (1 layer behind economiser)

Co C


SNCR + SCR

- Urea injection in 2 levels (22 inlets in total)


chamber

- Catalyst (1 layer between divided economiser)

Co D

winner

- Classifiers modification


- New OFA 2


SCR

- Economiser dividing for catalyst instalation

- Catalyst (between divided economiser – 2 layers

- Heat exchanger, ammonia evaporator, injection grid

- Measurument net grid

- ID fans modification


POWER PLANT POČERADY – UNIT 3, 4


20

Steam flow outlet 640t/h

Life steam 540 °C/ 175 bar

Reheat steam 550 °C/37 bar

Current NOx emissions 510 mg/m3




21


Co A


- OFA modification

- Wheel beeter mills modification,

- new classifiers


SCR

- Amonia water injection

- catalyst (2 layers behind economiser)

- ECO modification

Co B

- NO primary measures

SCR

- Amonia water injection

- catalyst (2 layers behind economiser)

- ECO modifications

Co C

- New Burners, new classifiers

- New air fans, new OFA2

- New coal powder pipelines

- Existing OFA1 modifications

SNCR


- Measurement of temperature distribution in furnacce

- Catalyst (1 layer between divided economiser)

Co D


- OFA modification

- Wheel beeter mills modification,

- new classifiers


SNCR+SCR



- SCR slip killer (induct layer)




22


Co E

winner

- OFA1 modification

- New OFA2

- Existing Burners modification,

- secondary air modifications,

SNCR

- Urea injection in 2 levels (12+20 inlets in total)



POWER PLANT MĚLNÍK I – boiler 1– 6


23


POWER PLANT MĚLNÍK I – boiler 1– 6


24


Co A

Winner

- New LNOx burners


- Secondary air duct, OFA modifications

- Primary air duct modifications

- Flue gas duct modifications

- New air fans

SNCR


- Furnace temperature mesurement AGAM

Co B

- New LNOx burners

- OFA modificaton

- Powder duct modification between mill and boiler

SNCR

- Urea injection in 3 levels, 7/7/6 inlets each level


chamber

Co C

- New LNOx burners

- OFA modificaton

- New air fans

SNCR

- Urea injection in 2 levels (16 inlets each level)


chamber

Co D

- New LNOx burners

- OFA modificaton

- Secondary air duct, OFA modifications

- Primary air duct modifications

SNCR

- Urea injection in 2 levels (16 inlets each level)


chamber

AGAM

LEGAL REQUIREMENTS – BREF/BAT

25

BAT conslusions shall be the reference for setting all the permit conditions

Permits must contain emission limit values (ELVs) set by the competent authority

that ensure that emissions do not exceed BAT AELs

Derogation from BAT AELs is allowed in specific cases as long as it is justified

(costs vs benefits in relation to criteria)

LEGAL REQUIREMENTS – BREF/BAT

26

Filip François: IED - What will change for LPC, Experts 2010, Berlin

BEST AVAILABLE TECHNIQUES (BAT)

ALMOST ALL OF CEZs POWER PLANTS:

Requirement for flue gases:

NOx – 180 mg/m3, 140 mg/m3 – biomass plant (200 mg/m3 – ELV)

SOx – 130 mg/m3 – pulverised coal boilers

180 mg/m3 – fluid boilers (200 mg/m3 – ELV)

TZL – 15 mg/m3, 20 mg/m3 – biomass plant (20 mg/m3 – ELV)

FROM January 1st, 2020 ?

SUMMARY

- Continuous changes of ELVs for power plants flue gases

- In East European Union countries opportunity for subsidies

- Not specified the scope of agreement eliminates lobbying of suppliers („our solution is

the best „)

- Offer (incl. technology) evaluation based on economical evaluation (NPV)

- Receiving up to date available technology (from feasibility study to agreement can take

two years)

- Eliminates specific concentration to technical solution from company that is providing

technical specification (limited know-how)

- Agreement can includes technically very specific solution for boiler.

- Reduction of time from decision to actual receive offers for DENOx projects

- If project is canceled before signature of agreement, company is not loosing money

for detail technical design

27

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Evaluating the way that cez makes technology decisions thorough insight ... · Evaluating the way that cez makes technology decisions thorough insight into their latest decision making