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

Transcription

1 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.

2 CONTENT 1. CEZ INTRODUCTION POWER PLANTS PORTFOLIO 2. LEGAL REQUIREMENTS IED 3. THEORY NOx EMISSIONS REDUCTION 4. PILOT PROJECT: LEGAL REQUIREMNTS - UPDATE 6. PORTFOLIO PROJECTS : LEGAL REQUIREMENTS - BREF/BAT 8. SUMMARY 1

3 CEZ COAL POWER PLANTS PORTFOLIO 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 MW Coal Power Plants - abroad Poland Skawina Elcho Bulgaria Varna Total 592 MW 238 MW 6 x 210 MW MW ČEZ Group Total MW 2

4 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

5 LEGAL REQUIEREMENTS - IED 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,

6 THEORY - NOx EMISSIONS REDUCTION Primary measures to reduce NOx emissions BAT Reference document for the LCP Overview of PM for reducing NOx emissions 5

7 THEORY - NOx EMISSIONS REDUCTION 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 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

8 THEORY - NOx EMISSIONS REDUCTION Secondary measures - SCR 7

9 THEORY - NOx EMISSIONS REDUCTION Secondary measures - SNCR 8

10 THEORY - NOx EMISSIONS REDUCTION Secondary measures combined SNCR + SCR 9

11 PILOT PROJECT 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/m 3 max. load 370 mg/m 3 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/ /3/2011 (PAC) 10

12 PILOT PROJECT POWER PLANT PRUNÉŘOV 2, UNIT 22 Primary measures: Mills modification, new burners OFA 1 (grey) OFA 2 (blue) Flue gas recirculation 11

13 PILOT PROJECT POWER PLANT PRUNÉŘOV 2, UNIT 22 Calculation of NPV key inputs: CAPEX of project OPEX Unit efficiency O 2 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

14 PORTFOLIO PROJECTS - PLAN Reduction of NO x 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

15 SUBSIDY PROGRAMME STRUCTURAL EUROPEAN UNION FUNDS 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,

16 LEGAL REQUIEREMENTS - UPDATE IED flexibilities in apllying LCP ELVs TRANSITIONAL PERIODS TNP option until June30th, 2020 opt out possible if < 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: SO 2 ELV may be replaced by min. desulphurisation rates 15

17 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) Czech Republic 16

18 PORTFOLIO PROJECTS Reduction of NO x 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

19 CEZ COAL POWER PLANTS PORTFOLIO POWER PLANT DĚTMAROVICE UNIT 3, 4 (IED NOx goals: max 200 mg/nm3) Final solution: PM + SCR 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:

20 CEZ POWER PLANTS PORTFOLIO POWER PLANT DĚTMAROVICE UNIT 3, 4 (IED NOx goals: max 200 mg/nm3) 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 - Burners sealing modification SNCR + SCR - Urea injection in 2 levels, 16 inlets each level - Measurement of temperature distribution in combustion chamber - Catalyst (1 layer behind economiser) Co C - Burners sealing modification SNCR + SCR - Urea injection in 2 levels (22 inlets in total) - Measurement of temperature distribution in combustion chamber - Catalyst (1 layer between divided economiser) Co D winner - Classifiers modification - Hot flue gas recirculation - New OFA 2 - Burners sealing modification SCR - Economiser dividing for catalyst instalation - Catalyst (between divided economiser 2 layers - Heat exchanger, ammonia evaporator, injection grid - Measurument net grid - ID fans modification 19

21 CEZ POWER PLANTS PORTFOLIO POWER PLANT POČERADY UNIT 3, 4 (IED NOx goals: max 200 mg/nm3) Steam flow outlet Life steam Reheat steam 640t/h 540 C/ 175 bar 550 C/37 bar Current NOx emissions 510 mg/m 3 20

22 CEZ POWER PLANTS PORTFOLIO POWER PLANT POČERADY UNIT 3, 4 (IED NOx goals: max 200 mg/nm3) BIDS Primary measures Secondary measures Co A - Burners outlet modificatin - OFA modification - Wheel beeter mills modification, - new classifiers - New coal powder distribution 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 Co D - New Burners, new classifiers - New air fans, new OFA2 - New coal powder pipelines - Existing OFA1 modifications - Burners outlet modificatin - OFA modification - Wheel beeter mills modification, - new classifiers - New coal powder distribution SNCR - Urea injection in 3 levels (36 inlets in total) - Measurement of temperature distribution in furnacce - Catalyst (1 layer between divided economiser) SNCR+SCR - Urea injection in 2 levels (22 inlets in total) - Measurement of temperature distribution in furnacce - SCR slip killer (induct layer) 21

23 CEZ POWER PLANTS PORTFOLIO POWER PLANT POČERADY UNIT 3, 4 (IED NOx goals: max 200 mg/nm3) BIDS Primary measures Secondary measures Co E winner - OFA1 modification - New OFA2 - Existing Burners modification, - secondary air modifications, SNCR - Urea injection in 2 levels (12+20 inlets in total) - Measurement of temperature distribution in furnacce 22

24 CEZ POWER PLANTS PORTFOLIO POWER PLANT MĚLNÍK I boiler 1 6 (IED NOx goals: max 200 mg/nm3) 23

25 CEZ POWER PLANTS PORTFOLIO POWER PLANT MĚLNÍK I boiler 1 6 (IED NOx goals: max 200 mg/nm3) BIDS Primary measures Secondary measures Co A Winner - New LNOx burners - Hot flue gas recirculation - Secondary air duct, OFA modifications - Primary air duct modifications - Flue gas duct modifications - New air fans SNCR - Urea injection in 2 levels, 8 inlets each level - 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 - Measurement of temperature distribution in combustion chamber Co C - New LNOx burners - OFA modificaton - New air fans SNCR - Urea injection in 2 levels (16 inlets each level) - Measurement of temperature distribution in combustion 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) - Measurement of temperature distribution in combustion chamber AGAM 24

26 LEGAL REQUIREMENTS BREF/BAT 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) 25

27 LEGAL REQUIREMENTS BREF/BAT 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? 26 Filip François: IED - What will change for LPC, Experts 2010, Berlin

28 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 DENO x projects - If project is canceled before signature of agreement, company is not loosing money for detail technical design 27