Plant Visit Report to WGQTPP Shnaghai, China

@Vaibhav Chauhan

P L A N T V I S I T R E P O RT WA I G A O Q I A O T H E R M A L

P OW E R S TA T I O N

P H A S E - I I I 2 X 1 0 0 0 M W S H A N G H A I , C H I N A ( 1 3 T H M A R C H 2 0 1 0 )

R E L I A N C E I N F R A S T R U C T U R E L T D . A - 3 1 , S E C - 6 4 , N O I D A .

S A S A N E N G I N E E R I N G D E P T .

Plant Visit Report Waigaoqiao TPS, Shanghai, China

1 of 14 @Vaibhav Chauhan

CONTENT

1.00.00 INTRODUCTION OF VISIT 2.00.00 CAPACITY 3.00.00 LOCATION 4.00.00 UNIQUE FEATURES OF PLANT 5.00.00 PHOTO GALLARY



1.00.00 INTRODUCTION

During the period 1995 to 2005 rapid buildup of generation capacity was stressed in

China. Maximum numbers of thermal units installed during this period were with

subcritical/supercritical technology of 600 MW class. After 2005 China start adopting

clean coal technology, the highly efficient bigger 900/1000 MW ultra supercritical units

are come into operation. These bigger units are now used as base load stations. The

old inefficient units are phased out or now used only during peak time.

After completion of engineering meeting with SEC on 12th March, on the day of our return to

India on 13th March, we got an opportunity to visit Waigaoqiao Thermal Power Station to see

recently installed 2x1000 MW ultra supercritical units.

2.00.00 CAPACITY

Waigaoqiao is presently second largest thermal power plant in the world. Its total installed

capacity is about 5000 MW. This plant was constructed in three (3) phases.

Phase-I (4 x 300 MW, subcritical) = 1200 MW

Phase-II (2 x 900 MW, ultra supercritical) = 1800 MW

Phase-III (2 x 1000 MW, ultra supercritical) = 2000 MW

World's Biggest Thermal Power Plants

Rank Power Plant Location Capacity

(MW) Fuel

Configuration (Unit Size / Technology)

Boiler / Turbine Manufacturer

1 Taichung Taiwan 5,500 Bitumin

ous coal 10x550 MW (sub critical) Foster

Wheeler/B&W /GE

2a Waigaoqiao China 5,000 Bituminous coal

4x300 MW (sub critical) 2x900 MW (Ultra supercritical) 2x1000 MW (Ultra supercritical)

Alstom/Siemens

2b

Guodian Beilun Power Station

China 5,000 Bituminous coal

5x600 MW 2x1000 MW (Ultra supercritical)

………….

3 Zouxian China 4,400 Bituminous coal

4x600 MW (sub critical) 2x1000MW (ultra supercritical)

Dongfang/Hitachi

4 Kendal South Africa 4,374

Low grade

Bituminous coal

6x672 MW (subcritical) CEI/Siemens

5 Majuba South Africa 4,113

Low grade

Bituminous coal

3x665 MW, 3x716 MW (supercritical)

Steinmüller/ Siemens



2.00.00 LOCATION

The plant is about 18 km from the centre of Shanghai, in the Pudong District, on the south

bank of the Yangtze River, which provides cooling water and also coal transport, from the

Shenfu and Dongshen mines.

3.00.00 UNIQUE FEATURES OF 1000 MW UNITS

1. 1000 MW unit is of state of art design & technology, the tower type boiler and

turbine/generator are manufactured and supplied by SEC under license of Alstom &

Siemens respectively.

2. Ultra supercritical steam parameters (HPT inlet pressure – 252 bar & MS/RH steam

temperature – 605 deg C) are used for 1000 MW units

3. The unit is operated with only single 1x100% TDBFP, there is no standby/startup motor

driven boiler feed pump. 1x100% TDBFP is used during startup which takes steam from

station auxiliary steam header during startup.

4. TD BFP is located on mezzanine floor and having separate condenser.

5. 2x100% condensate extraction pumps are used for 1000 MW unit.

6. Dual pressure condenser is used which gives advantage in net turbine cycle heat rate. SEC

is giving similar type of condenser in Sasan UMPP.

7. 1000 MW units are provided with 2x50% high pressure heater banks with group bypass

arrangement. Same practice is being followed in India for 500 MW units.

8. Coal is received by Barges which is unloaded on dedicated jetty and stored under shed.

9. Both SCR (selective catalytic reduction) for NOx removal & FGD (Flue gas

desulphurization) for SOx removal are installed for 1000MW units.

10. Instead of metallic Scaffolding for local maintenance, light weight bamboos are used for

making platform & temporary maintenance structure.

11. Six (6) 5W+1S front mills are provided for 1000 MW steam generator.

12. Instead of water impounded bottom hopper continuous ash removal scraper conveyer is

used.

13. 2x100% PHE and DMCW pumps are provided common for TG & SG auxiliaries cooling

in each 1000 MW unit.

14. 1000 MW generator is designed for 0.9 pf.

15. Instead of open switchyard, gas insulated switchyard has been provided results in saving of

space.



16. Turbine operating floor, ground floor in TG building, mill area, boiler area are layed with

ceramic tiles which gives excellent surface finish & aesthetic looks.

17. Excellent House keeping - Power plant is very clean, properly maintained, warning sign

boards are provided wherever required.

5.00.00 PHOTO GALLARY:

Turbine Hall 2 x 1000 MW

Single flow HP & double flow IP Turbine



Steam is fed to both LP turbines by Single crossover pipe

1000 MW (0.9 pf) Generator name plate, stator weight 443 Tons



Common control room for 2 x 1000 MW units



Critical parameters of 1000 MW unit

1x100% TDBFP (No startup MD BFP)



1x100% TDBFP of SULZER Make

Separate Condenser for TDBFP



2x100% Condensate extraction pumps

2x100% PHE (Common for both TG & SG Aux)



Tower type boiler of 1000MW unit-8 (photograph taken from top of unit no-7, 121.5 m)

Three (3) pass ESP & FGD unit



Coal storage area covered with shed

Coal Unloading jetty



Long retractable soot blowers

Bamboo is used for temporary platforms in boiler for maintenance



Scarper conveyer for bottom ash

6 Nos. front mills Arrangement



Gas insulated switchyard

Plant Visit Report to WGQTPP Shnaghai, China

Documents

Transcript of Plant Visit Report to WGQTPP Shnaghai, China