ratchaburi thermal power plant · supercritical sliding pressure operation ratchaburi thermal power...

โรงไฟฟาพลงความรอนราชบรโรงไฟฟาพลงความรอนราชบร

Supercritical Sliding Pressure Operation

RATCHABURI THERMAL POWER PLANTRATCHABURI THERMAL POWER PLANT

Supercritical Sliding Pressure Operation

Once-Through Boiler

นายพลนายพลเชษฐเชษฐ โตสมบญโตสมบญา ลา ล ฐฐ ตส ญตส ญ

วฒวศวกรเครองกล วฒวศวกรเครองกล ((วกวก..914914))

วศวกรระดบ วศวกรระดบ 77ศ ก ดศ ก ด

หมวดวศวกรรมการผลตหมวดวศวกรรมการผลต

หนวยวศวกรรมและบารงรกษาโรงไฟฟาพลงความรอนหนวยวศวกรรมและบารงรกษาโรงไฟฟาพลงความรอน

โครงการเดนเครองและบารงรกษาประจาโรงไฟฟา โครงการเดนเครองและบารงรกษาประจาโรงไฟฟา บรษท บรษท ผลตไฟฟาราชบร ผลตไฟฟาราชบร จากดจากด

การไฟฟาฝายผลตแหงประเทศไทยการไฟฟาฝายผลตแหงประเทศไทย

TopicTopic

Introduction1

How to Operate2 p

3 How to Design3 How to Design

How to Maintain4 How to Maintain4

IntroductionIntroduction

Once Through Boiler for Power Plant in ThailandOnce Through Boiler for Power Plant in Thailand Once Through Boiler for Power Plant in ThailandOnce Through Boiler for Power Plant in Thailand

Plant Location Capacity Technology

RatchaburiThermal Power Plant Unit 1 & 2

Ratchaburi 735 MW Supercritical(Oil / Gas)

GHECO-One Power Plant Rayong 660 MW Supercritical

(Coal)

Maemoh Thermal Power Plant* Maemoh xxx MW

UltraSupercritical

(Coal)( )

* Maemoh Power Plant, Electricity Generating Authority of Thailand (EGAT) - Construction on process


Once Through Boiler TechnologyOnce Through Boiler Technology Once Through Boiler TechnologyOnce Through Boiler Technology

Plant Main Steam Temperature

Reheat Steam Temperature Pressure

Advanced Ultra Supercritical* 700-760 C 815 C 350 Bar

Ultra Supercritical 600 C 620 C 290 Bar

Supercritical 540 C 560 C 250 Bar

* Babcock & Wilcox Power Generation Group, Inc.** Siemens AG . Power Generation

IntroductionIntroductionSupercritical Cycle

Critical Point221 bar-a,371 deg-C371 deg C

Tem

pT

Subcritical Cycle

* Adani Power Maharashtra LTD.Entropy

IntroductionIntroductionRatchaburiRatchaburi Power PlantPower PlantRatchaburiRatchaburi Power PlantPower Plant

Boiler Unit 2Boiler Unit 1

Turbine

Building FGD Unit 2

FGD Unit 1

Cooling Tower Unit 1

RatchaburiRatchaburi Thermal Power PlantThermal Power Plant

C it 735 MW/U it Capacity 735 MW/Unit

Once Through Boiler

3 Stage Turbine

Water Cool Generator

With Flue Gas Desulphurization (FGD)

Loading / De-loading Rate 7-60 MW/min

Primary Response 20 MW Primary Response 20 MW

Five Minute Response 137 MW


Plant HistoricalPlant Historical Plant HistoricalPlant Historical

Initial FiringOct 26 2000

First Sync.Dec 24 2000

COD.Jun 15 2000

Steam AdmisDec 18 2000 May 15,201414 Years Operation

RB-T1

Oct 26,2000 Dec 24,2000 Jun 15,2000Dec 18,2000

I iti l Fi i Fi t S CODSt Ad i

RB-T2

Initial FiringMar 25,2000

First Sync.May 3,2000

COD.Oct 28,2000

May 14,201414 Years OperationSteam AdmisApr 28,2000

RB-T2

How to OperateHow to Operatepp

How to OperateHow to Operatepp

Plant Operation Shift 1 Section

Operation Section Organization Operation Section Organization ChartChart

Plant Operation Shift 1 Section1

Supervisor Engineer1

Thermal Plant Unit 1 Common Thermal Plant Unit 2

Boiler BoardTurbine

B d

Auxiliary

B il

Auxiliary

T biBoiler Board

Turbine

B d

Auxiliary

B il

Auxiliary

T biBoard Boiler Turbine Board Boiler Turbine1 1 1 1 1 1 1 1

WWTF. FGD2 2

ow to Operateow to Operatepp

P&I DiagramP&I Diagramgg

ow to Operateow to Operatepp

Warmth ConditionWarmth Condition

How long from Off SynchHot < 8 hours

W 8 h d ≤ 96 hWarm > 8 hours and ≤ 96 hours

Cold > 96 hours

StartStart--Up Notice Up Notice Time (Each Time (Each Unit)Unit)

ow to Designow to Design

ication

gg

Mitsubishi Supercritical Sliding

Pressure Operation

Once Through BoilerOnce-Through Boiler

m Pressure : Superheat 279 barg

Reheat 67 bargReheat 67 barg

Temp. : Superheat 548 CR h t 568 CReheat 568 C

Flow : Superheat 2,530 t/h

R h t 2 004 t/hReheat 2,004 t/h

g System : Balanced


ication

gg

m Temperature Control :

Superheat 2 Stage De-superheater Spray

(3 Stage Superheater)

Reheat Gas Recirculation & 1 Stage

De-superheater Spray

(2 Stage Reheater)

troductiontroduction

tsubishi tsubishi Supercritical Sliding Pressure Supercritical Sliding Pressure Operation Operation

Th h B ilTh h B ilce ce Through BoilerThrough Boiler

Advantage of This Boiler




Higher Thermal Efficiency




Sliding Pressure Operation (SH)




Higher Partial Load Efficiency




Less Thermal Stress To HP Turbine




Fast Response Load Demand




Higher Thermal Efficiency

Sliding Pressure Operation (SH)

Higher Partial Load Efficiency

Less Thermal Stress To HP Turbine

Fast Response Load Demand

Low Nox PM Burner

Mixed Fuel Operation (Heavy Oil & Gas)p y


erationeration ConditionCondition

ondition Description Steam Condition Output (kW)

erationeration ConditionCondition

A Guarantee Capacity 24.2MPa 538/566C 735,000

B Max. Calculation 25.4MPa 538/566C 841,000

C Guarantee T/B Max. 24.2MPa 538/566C 756,500

D MCR 25.4MPa 538/566C 804,000

E Normal Pressure VWO 24 2MPa 538/566C 778 500E Normal Pressure VWO 24.2MPa 538/566C 778,500

F 75% 21.4MPa 538/566C 551,250

G 50% 14.2MPa 538/566C 367,500

H 25% 10.9MPa 538/532C 183,750


C diti F l Oil F l G

Boiler Efficiency (%)Boiler Efficiency (%)

Condition Fuel Oil Fuel Gas

100% ECR 91.09 86.02

75% 91.44 86.33

50% 91.81 86.68

25% 91.98 86.89

B-MCR 90.97 85.82

ow to Designow to Designgg


Structure and Structure and EquipmentsEquipments

gg

Supercritical Sliding Pressure OperationSupercritical Sliding Pressure Operation

OO Th h B ilTh h B ilOnceOnce--Through BoilerThrough Boiler


ucture and ucture and EquipmentsEquipments

gg

ow to Designow to DesignStructure and Structure and EquipmentsEquipments

gg

Natural Gas

Heavy OilHeavy Oil

Light Oil



gg



gg

Standard Emission Gas Oil


gg


gg

Steam / Water ConditionPressure 25.5 MPa

Temperature 339 CFlow 2200 t/h


gg

WS

SH&

W TRB

&RH

DEAWSDT

TRB

ECO

HP HTR

BFP

COND.

LP HTRCPP CP

Steam / Water Condition


gg

1ry 2ry 3ry1ry 2ry 3ry

SH Steam ConditionPressure 24.7 MPa

Temperature 540 C


gg

RH Steam ConditionPressure 4 48 MPaPressure 4.48 MPa

Temperature 568 C


gg

Safety Valve Set Pressure

(Main Steam Line 7 ตว)


gg

Safety Valve Set Pressure


gg

Feed Water ConditionPressure 27.8 MPa

Temperature 285.4 CFlow 2200 t/h


gg

Air Heater เพมอณหภมอากาศทใช

ในการเผาไหมจาก 41 --->335 C


gg


gg

Gas Recirculation Fan

ow to Designow to DesignWater / Steam Flow DiagramWater / Steam Flow Diagram

gg

Water Seperature

Pressure 25.5 MPa

Temperature 408 C

Water Wall

Temperature 408 C

Water Wall

Pressure 25.5 MPa

Temperature 339 C

E i

p

Economizer

Pressure 27.8 MPa

ow to Designow to DesignWater / Steam Flow DiagramWater / Steam Flow Diagram

gg

RH Steam Condition

Pressure 4.48 MPa

Temperature 568 C

SH Steam Condition

P 24 7 MPPressure 24.7 MPa

Temperature 540 C

ow to Maintainow to Maintain


Minor Inspection ทก 2 ป ระยะเวลา 40 วน

Planned OutagePlanned Outage

Major Overhaul ทก 6 ป ระยะเวลา 60 วน

ow to Maintainow to MaintainPreservation Boiler Preservation Boiler –– Fire SideFire Side

difier

m3/hr

000


UD 22000 (Boiler) UD 3500 (LP Turbine)

ow to Maintainow to MaintainPreservation BoilerPreservation Boiler

pment Preservation Method How to check

am erator

Wet Lay Up (Old)Fill Demin. with

Wet Lay Up (New)Fill Demin. Water with Sampling and

ter / m Side)

Hydrazine 40% (conc) solution (200 ppm) and Ammonia for control pH

NH3 and control pH > 9, Low DO and Cation

Conductivity ≥ 0.2 µS/cm

p gCheck Water Quality Every

2 Weeks10

am erator

Dry Lay UpInstall Dehumidifier for Control Relative Humidity Install Humidity

Side)Install Dehumidifier for Control Relative Humidity

< 20 %Install Humidity Recorder and Check It Every

DayDay

ow to Maintainow to MaintainPreservation BoilerPreservation Boiler

ow to Maintainow to MaintainHigh Pressure Heater & Relief ValveHigh Pressure Heater & Relief Valve

ow to Maintainow to MaintainPolisher System Polisher System เพอปรบปรงคณภาพนา เพอปรบปรงคณภาพนา DemineralizeDemineralize

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ratchaburi thermal power plant · supercritical sliding pressure operation ratchaburi thermal power...

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