800MW Class USC Coal Fired Power Plant
KEPCO E&C has secured 800MW class high capacity highly efficient coal fired thermal power plant engineering technology from the A/E of Yeongheung Thermal Power Plant Units 1 & 2. This has opened a new chapter for high capacity, and environment-friendly power plants. 800MW class coal fired power plant has upgraded the maximum steam temperature from 538℃ of 500MW class standard coal fired power plants to 566℃ to increase heat efficiency by 2%. Starting from the design of the Yeongheung Thermal Power Plant Units 3 & 4, which are the follow-up models, reheating steam condition was upgraded to 593℃.
Furthermore, the top level new technology, such as highly efficient denitrification/desulfurization facilities, gas reheater with no leaks, and dry type super-low-temperature electrostatic precipitator.
We have applied the state-of-the-art environmental facilities to the design to emit sulfur oxides (SOx), nitrogen oxides (NOx) and dust much lower than the international environmental regulatory standards. The 800MW class Ultra Super-Critical Pressure coal fired engineering technology has been upgraded with the 1000MW class next generation coal fired thermal power plant engineering technology. Accordingly,
KEPCO E&C has secured the world’s top class competitiveness in high capacity, and clean coal fired thermal power. In the overseas market, we have successfully implemented technological support for the India’s TATA group’s 4,000MW Ultra Mega Power Project (UMPP, 800MW x 5).
Schematic Diagram of 800MW Class Coal Fired Power Plant
Major Design Features of Yeongheung Power Plant Units 1&2 and 3&4
| Category | Units 1 & 2 | Units 3 & 4 | |
|---|---|---|---|
Power Capacity (MGR) |
814MW X 2 |
886 MW X 2 |
|
Plant Efficiency |
43.50% |
43.54% |
|
Vacuum Degree |
38mmHga |
38mmHga |
|
Operation Mode |
Base Load Operation (The Facilities are Equipped with Load Following Function for the Smooth System Operation) |
||
Boiler |
Type |
Critical Pressure, Once Through, Single Reheating Type, |
Critical Pressure, Once Through, Single Reheating Type, |
Fuel Used |
Bituminous Coal/Light Oil (When Starting Up) |
||
Steam Condition |
255kg/㎠g, 569℃/569℃ |
255kg/㎠g, 569℃/569℃ |
|
Efficiency |
90.14% |
90.14% |
|
Turbine |
Type |
Tandem Compound, Single Glow HP, Double Flow IP & LP Turbine, Single Reheat, Regenerating and Condensing |
|
Number of Rotations |
3,600rpm |
3,600rpm |
|
Steam Condition |
246kg/㎠g, 566℃/566℃ |
246kg/㎠g, 566℃/593℃ |
|
Efficiency |
48.26% |
48.42% |
|
Generator |
Cylindrical Rotor, Sealing Type, Hydrogen and Water Cooled, 3-Phase Synchronous |
||
Main Transformer |
Three(3) Single Phase, Two(2) Windings, FOA ee(3) Single Phase, Two(2) Windings, FOA |
||
Main Control Unit |
Distributed Digital Control (Integrated Control and Monitoring System) |
||
Environmental Facility Engineering Standards |
SOx |
45ppm (6% O₂base) |
25ppm (6% O₂base) |
NOx |
55ppm (6% O₂base) |
15ppm (6% O₂base) |
|
Dust |
20㎎/s㎥ (6% O₂base) |
5㎎/s㎥ (6% O₂base) |
|
-
- Category
- Power Capacity (MGR)
- Units 1&2
- 814MW X 2
- Units 3&4
- 886 MW X 2
-
- Category
- Plant Efficiency
- Units 1&2
- 43.50%
- Units 3&4
- 43.54%
-
- Category
- Vacuum Degree
- Units 1&2
- 38mmHga
- Units 3&4
- 38mmHga
-
- Category
- Operation Mode
- Units 1&2
- Base Load Operation (The Facilities are Equipped with Load Following Function for the Smooth System Operation)
- Units 3&4
- Base Load Operation (The Facilities are Equipped with Load Following Function for the Smooth System Operation)
-
- Category
- Boiler : Type
- Units 1&2
- Critical Pressure, Once Through, Single Reheating Type, Balanced Draft
- Units 3&4
- Critical Pressure, Once Through, Single Reheating Type, Balanced Draft
-
- Category
- Boiler : Fuel Used
- Units 1&2
- Bituminous Coal/Light Oil (When Starting Up)
- Units 3&4
- Bituminous Coal/Light Oil (When Starting Up)
-
- Category
- Boiler : Steam Condition
- Units 1&2
- 255kg/㎠g, 569℃/569℃
- Units 3&4
- 255kg/㎠g, 569℃/569℃
-
- Category
- Boiler : Efficiency
- Units 1&2
- 90.14%
- Units 3&4
- 90.14%
-
- Category
- Turbine : Type
- Units 1&2
- Tandem Compound, Single Glow HP, Double Flow IP & LP Turbine, Single Reheat, Regenerating and Condensing
- Units 3&4
- Tandem Compound, Single Glow HP, Double Flow IP & LP Turbine, Single Reheat, Regenerating and Condensing
-
- Category
- Turbine : Number of Rotations
- Units 1&2
- 3,600rpm
- Units 3&4
- 3,600rpm
-
- Category
- Turbine : Steam Condition
- Units 1&2
- 246kg/㎠g, 566℃/566℃
- Units 3&4
- 246kg/㎠g, 566℃/593℃
-
- Category
- Turbine : Efficiency
- Units 1&2
- 48.26%
- Units 3&4
- 48.42%
-
- Category
- Generator
- Units 1&2
- Cylindrical Rotor, Sealing Type, Hydrogen and Water Cooled, 3-Phase Synchronous
- Units 3&4
- Cylindrical Rotor, Sealing Type, Hydrogen and Water Cooled, 3-Phase Synchronous
-
- Category
- Main Transformer
- Units 1&2
- Three(3) Single Phase, Two(2) Windings, FOA ee(3) Single Phase, Two(2) Windings, FOA
- Units 3&4
- Three(3) Single Phase, Two(2) Windings, FOA ee(3) Single Phase, Two(2) Windings, FOA
-
- Category
- Main Control Unit
- Units 1&2
- Distributed Digital Control (Integrated Control and Monitoring System)
- Units 3&4
- Distributed Digital Control (Integrated Control and Monitoring System)
-
- Category
- Environmental Facility Engineering Standards : SOx
- Units 1&2
- 45ppm (6% O₂base)
- Units 3&4
- 25ppm (6% O₂base)
-
- Category
- Environmental Facility Engineering Standards : NOx
- Units 1&2
- 55ppm (6% O₂base)
- Units 3&4
- 15ppm (6% O₂base)
-
- Category
- Environmental Facility Engineering Standards : Dust
- Units 1&2
- 20㎎/s㎥ (6% O₂base)
- Units 3&4
- 5㎎/s㎥ (6% O₂base)
The Characteristics of Yeongheung Thermal Power Plants
- Drag Chain Conveyor and Fly-ash Refining Facility is applied to Ash Treatment Equipment: all the fly-ash generated during the plant operation can be recycled.
- Dehydrated Reaction Byproducts (Plaster) generated from Desulfurization Facilities: dehydrate to 10% or less moisture content, and sell all of them as cement additives or raw ingredients for plaster boards.
- Waste Water: treat with physicochemical method and electrodialysis method and then recycling it as water for desulfurization facilities, so there is no waste water discharging to outside of the plant.