1. Symulacja kotła K-4 w ERSA Zmodernizowany układ paleniskowy przez konsorcjum Energotechnika-Energorozruch S.A.- IPW Polin Sp. z o.o zespołów młynowych w ruchu - praca na samym węglu - moc bloku 225MWe
Modelowanie wykonane przez:
Dipl.-Ing. Frank Blum, Dr.-Ing. Xiaohai Han,
Dr.-Ing. Benedetto Risio
RECOM Services GmbH, Stuttgart

2. 10 Nozzles of Thinned Air-Coal Mix in Operation
3D-Geometry Model — Burner and OFA Arrangement
OFA-III on Rear Wall
- fully opened
(tilted down 20°)
Front View
5 Mills in Operation
OFA-II - fully opened
(tilted down 15°)
10 Nozzles of Thinned Air-Coal Mix in Operation
Thinned Air-Coal Mix (tilted down 15°)
Biomass/Oil Nozzle
(tilted down 15°)
OFA-I
(no tilting – fully opened)
10 Burners in Operation
Burner Level 2
Burner Level 1

3. 28.5 (rear & side walls); 5.1 (Front wall) ( = 0.165)
Coal and Air Mass Flows
Brn Level 1
(12.6 m)
Brn Level 2
(15.1 m)
Thinned Mix (20.85 m)
Total
Coal mass flow [kg/s]
4 × 1.89 = 7.56
6 × 1.89 = 11.34
10 × 0.81 = 8.1
27.0
Core air [kg/s]
0.8
1,2 --
2.0
Primary air [kg/s]
4 × 3.35 = 13.4
6 × 3.35 = 20.1
10 × 3.35 = 33.5
67.0
Secondary air [kg/s]
7.5
10.3
4.8
22.6
Tertiary air [kg/s]
17.6
16.8
34.4
Level Air/Coal Ratio 
0.690
0.566
0.626
0.618
OFA-I [kg/s]
11.4 ( = 0.056)
11.4
OFA-II [kg/s]
34.2 ( = 0.168)
34.2
OFA-III [kg/s]
24.8 ( = 0.122)
24.8
Protective air [kg/s]
28.5 (rear & side walls); 5.1 (Front wall) ( = 0.165)
33.6
Bottom air [kg/s]
4.8 ( = 0.024)
Total Air [kg/s]
234.8 ( = 1.15)

4. Coal Analysis and Particle Size Distribution
Main Burner (12.6m & 15.1 m)
Coal Analysis
C (ar) [%]
56.40
H (ar) [%]
3.57
O (ar) [%]
3.92
N (ar) [%]
0.98
S (ar) [%]
0.63
Ash (ar) [%]
27.10
Moisture (ar) [%]
7.40
Volatile (daf) [%]
27.5
Hu (daf) [MJ/kg]
33.5
R88 = 30 %
R200 = 5 %

5. Thinned Air-Coal Mix (20.85 m)
Coal Analysis and Particle Size Distribution
Thinned Air-Coal Mix (20.85 m)
Coal Analysis
C (ar) [%]
56.40
H (ar) [%]
3.57
O (ar) [%]
3.92
N (ar) [%]
0.98
S (ar) [%]
0.63
Ash (ar) [%]
27.10
Moisture (ar) [%]
7.40
Volatile (daf) [%]
27.5
Hu (daf) [MJ/kg]
33.5
R88 = 15 %
R200 = 1 %

6. Velocity Distribution: Magnitude
[m/s] FW RW

7. Velocity Distribution: Magnitude
[m/s] FW RW FW RW

8. Temperature Distribution
[°C] FW RW

9. Temperature Distribution
[°C] FW RW FW RW

10. Fluegas Temperature Profile along Furnace Height
OFA OFA3
BL1 BL BL4 OFA FE
Cross Pass
Sec. Pass
35/

11. Oxygen Distribution
Oxygen
[vol.-%, dry] FW RW

12. Oxygen Distribution
Oxygen
[vol.-%, dry] FW RW FW RW

13. Carbon Monoxide DistributionCO
[vol.-%, dry] FW RW

14. Carbon Monoxide DistributionCO
[vol.-%, dry] FW RW FW RW

15. CO-Profile along Furnace Height
OFA OFA3
BL1 BL BL4 OFA FE
Cross Pass
Sec. Pass
35/

16. NOx-Profile along Furnace Height
OFA OFA3
BL1 BL BL4 OFA FE
Cross Pass
Sec. Pass
35/

17. Simulation for Polin-Concept with Protective Air
Boiler Exit and Emission Values
Simulation for Polin-Concept with Protective Air
Furnace Exit Temp. (mean/max) [°C]
(Level 34.7 m)
1245/1360
Fluegas Temp. after ECO [°C]
344
O2 after ECO [Vol.-%,dry]
3.2
CO [mg/Nm3, at 6% O2 ] 46
NOx [mg/Nm3, at 6% O2]
326
Unburned Carbon in Ash
5.6