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Generation
Nkangala District Municipality
Date: 2020/05/22
P O Box 437
Middleburg
Enquiries: Duvha Environmental Management
1050
+27 13 690 0445
+27 66 212 2105
Attention:
Mr V Mahlangu
Enquiries: Ms Simthandile Nhlapo
+27 13 690 0445
AND
+27 66 212 2105
Directorate: Air Quality Management Services
The Chief Director:
Mr S S Maluleka
Department of Environmental Services
Total number of pages: 14
Private Bag X447
PRETORIA
0001
Tel: (012) 310 3263
Total number of annexes:1
Fax: (012) 320 0488
DUVHA POWER STATION
Atmospheric Emission License 17/4/AEL/MP312/11/07
GENERAL MANAGER DATE
2020-06-08
SEPTEMBER 2019
DUVHA POWER STATION MONTHLY EMISSIONS REPORT Atmospheric Emission License 17/4/AEL/MP312/11/07
1 RAW MATERIALS AND PRODUCTS
Raw Materials and Products
Raw Material Type
Units Maximum Permitted Consumption Rate
Consumption Rate Sep-2019
Coal Tons 1 400 000 571 186
Fuel Oil Tons 5 000 3754.05
Production Rates
Product / By-Product Name
Units Maximum Production Capacity Permitted
Production Rate Sep-2019
Energy GWh 3600 973.73
Ash Tons not specified 160 389.1
2 ENERGY SOURCE CHARACTERISTICS
Coal Characteristic
Units Stipulated Range Monthly Average Content
Sulphur Content % 0.6 TO >1.2 0.840
Ash Content % 27 TO 30 28.080
3 EMISSION LIMITS (mg/Nm³)
Associated Unit/Stack
PM SOx NOx
Unit 1 100 3500 1100
Unit 2 100 3500 1100
Unit 3 100 3500 1100
Unit 4 100 3500 1100
Unit 5 100 3500 1100
Unit 6 100 3500 1100
4 ABATEMET TECHNOLOGY (%)
Associated Unit/Stack Technology Type Efficiency Sep-2019
Unit 1 Fabric Filter Plant (FFP) Unit Off-line
Unit 2 Fabric Filter Plant (FFP) 99.82%
Unit 3 Fabric Filter Plant (FFP) Unit Off-line
Unit 4 Electro Static Precipiator (ESP) 99.64%
Unit 5 Electro Static Precipiator (ESP) 99.73%
Unit 6 Electro Static Precipiator (ESP) 99.69%
5 MONITOR RELIABILITY (%)
Associated Unit/Stack
PM SO₂ NO
Unit 2 99.9 99.6 99.8
Unit 4 97.2 98.8 98.8
Unit 5 99.9 99.6 99.8
Unit 6 99.9 100.0 100.0
6 EMISSION PERFORMANCE
Table 6.1: Monthly tonnages for the month of September 2019
Associated Unit/Stack
PM (tons) SO2 (tons) NOx (tons)
Unit 2 85.7 3 694 1 973
Unit 4 145.8 2 907 1 754
Unit 5 76.8 2 704 1 077
Unit 6 88.7 1 956 1 036
SUM 397.1 11 262 5 841
Table 6.2: Operating days in compliance to PM AEL Limit - September 2019
Associated Unit/Stack
Normal Grace Section
30 Contravention
Total Exceedance
Average PM
(mg/Nmᶟ)
Unit 2 27 2 0 0 2 45.5
Unit 4 19 4 2 0 6 99.5
Unit 5 20 2 0 0 2 53.4
Unit 6 14 5 0 0 5 89.5
SUM 80 13 2 0 15
Table 6.3: Operating days in compliance to SOx AEL Limit - September 2019
Associated Unit/Stack
Normal Grace Section
30 Contravention
Total Exceedance
Average SOx
(mg/Nmᶟ)
Unit 2 30 0 0 0 0 1 956.8
Unit 4 29 0 0 0 0 1 615.6
Unit 5 24 0 0 0 0 1 781.5
Unit 6 22 0 0 0 0 1 531.4
SUM 105 0 0 0 0
Table 6.4: Operating days in compliance to NOx AEL Limit - September 2019
Associated Unit/Stack
Normal Grace Section
30 Contravention
Total Exceedance
Average NOx
(mg/Nmᶟ)
Unit 2 30 0 0 0 0 1 035.7
Unit 4 29 0 0 0 0 955.9
Unit 5 24 0 0 0 0 706.4
Unit 6 22 0 0 0 0 800.4
SUM 105 0 0 0 0
Table 6.5: Legend Description
Condition Colour Description
Normal Emissions below Emission Limit Value (ELV)
Grace Emissions above the ELV during grace period
Section 30 Emissions above ELV during a NEMA S30 incident
Contravention Emissions above ELV but outside grace or S30 incident conditions
0
100
200
300
400
500
600
0
20
40
60
80
100
120
140
160
180
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
PM
(m
g/N
mᶟ)
Figure 2: Duvha Unit 2 PM Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U2 MW
Emissions limit exceeded due to cold unit light.
0
100
200
300
400
500
600
0
50
100
150
200
250
300
350
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
PM
(m
g/N
mᶟ)
Figure 4: Duvha Unit 4 PM Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U4 MW
Section 30 incident reported and investigation report submitted
Emissions limit exceeded due to cold unit light.
0
50
100
150
200
250
300
350
400
450
500
0
50
100
150
200
250
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
PM
(m
g/N
mᶟ)
Figure 5: Duvha Unit 5 PM Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U5 MW
Emissions limt exceeded due Precipsthat kept on tripping under voltage and DHP LH Row 4 that was blocked
0
100
200
300
400
500
600
0
50
100
150
200
250
300
350
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
PM
(m
g/N
mᶟ)
Figure 6: Duvha Unit 6 PM Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U6 MW
Emissions limit exceeded due to cold unit light.
Emissions limt exceeded due to dust hoppers that were full and faulty precips field.
Emissions limit exceeded due to cold unit light.
0
100
200
300
400
500
600
0
500
1000
1500
2000
2500
3000
3500
4000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
SOx
(mg/
Nmᶟ)
Figure 8: Duvha Unit 2 SOx Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U2 MW
0
100
200
300
400
500
600
0
500
1000
1500
2000
2500
3000
3500
4000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
SOx
(mg/
Nmᶟ)
Figure 10: Duvha Unit 4 SOx Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U4 MW
0
50
100
150
200
250
300
350
400
450
500
0
500
1000
1500
2000
2500
3000
3500
4000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
SOx
(mg/
Nmᶟ)
Figure 11: Duvha Unit 5 SOx Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U5 MW
0
100
200
300
400
500
600
0
500
1000
1500
2000
2500
3000
3500
4000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
SOx
(mg/
Nmᶟ)
Figure 12: Duvha Unit 6 SOx Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U6 MW
0
100
200
300
400
500
600
0
200
400
600
800
1000
1200
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
NO
x (m
g/N
mᶟ)
Figure 14: Duvha Unit 2 NOx Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U2 MW
0
100
200
300
400
500
600
0
200
400
600
800
1000
1200
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
NO
x (m
g/N
mᶟ)
Figure 16: Duvha Unit 4 NOx Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U4 MW
0
50
100
150
200
250
300
350
400
450
500
0
200
400
600
800
1000
1200
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
NO
x (m
g/N
mᶟ)
Figure 17: Duvha Unit 5 NOx Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U5 MW
0
100
200
300
400
500
600
0
200
400
600
800
1000
1200
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bo
iler
Load
(M
W)
NO
x (m
g/N
mᶟ)
Figure 18: Duvha Unit 6 NOx Emissions - September 2019
Normal Grace Section 30 Contravention AEL Limit U6 MW
7 SHUT DOWN AND LIGHT UP INFORMATION
Tables 7.1: Shut-down and light-up information for the month of September 2019
Unit No.2 Event 1
Breaker Open (BO) 4:50 AM 2019/09/04
Draught Group (DG) Shut Down (SD)
5:50 AM 2019/09/04
BO to DG SD (duration)
00:01:00 DD:HH:MM
Fires in time 2:30 AM 2019/09/05
Synch. to Grid (or
BC) 1:55 PM 2019/09/05
Fires in to BC (duration)
00:11:25 DD:HH:MM
Emissions below limit from BC (end date)
not > limit not > limit
Emissions below limit from BC (duration)
n/a DD:HH:MM
Unit No.4 Event 1 Event 2
Breaker Open (BO)
BO previously
BO previously
10:30 PM 2019/09/13
Draught Group (DG) Shut Down (SD)
n/a n/a 12:00 AM 2019/09/14
BO to DG SD (duration)
n/a DD:HH:MM 00:01:30 DD:HH:MM
Fires in time 8:00 PM 2019/09/04 3:35 AM 2019/09/14
Synch. to Grid (or BC)
9:55 PM 2019/09/04 7:05 AM 2019/09/14
Fires in to BC (duration)
00:01:55 DD:HH:MM 00:03:30 DD:HH:MM
Emissions below limit from BC (end date)
9:00 PM 2019/09/09 12:00 AM 2019/09/15
Emissions below limit from BC (duration)
04:23:05 DD:HH:MM 00:16:55 DD:HH:MM
Unit No.5 Event 1 Event 2
Breaker Open (BO)
11:25 PM 2019/09/06 11:50 PM 2019/09/27
Draught Group (DG) Shut Down (SD)
6:15 AM 2019/09/10 DG did
not trip or SD
DG did not trip or SD
BO to DG SD (duration)
03:06:50 DD:HH:MM n/a DD:HH:MM
Fires in time 6:20 AM 2019/09/10
Synch. to Grid (or BC)
6:35 AM 2019/09/11
Fires in to BC (duration)
01:00:15 DD:HH:MM 00:00:00 DD:HH:MM
Emissions below limit from BC (end date)
12:00 AM 2019/09/12
Emissions below limit from BC (duration)
00:17:25 DD:HH:MM DD:HH:MM
Unit No.6 Event 1 Event 2
Breaker Open (BO)
3:10 PM 2019/09/04 11:50 PM 2019/09/17
Draught Group (DG) Shut Down (SD)
3:55 PM 2019/09/08 11:40 PM 2019/09/23
BO to DG SD (duration)
04:00:45 DD:HH:MM 05:23:50 DD:HH:MM
Fires in time 4:00 PM 2019/09/08 3:25 AM 2019/09/24
Synch. to Grid (or BC)
4:25 PM 2019/09/08 4:10 PM 2019/09/24
Fires in to BC (duration)
00:12:55 DD:HH:MM 00:12:45 DD:HH:MM
Emissions below limit from BC (end date)
9:00 AM 2019/09/11 2:00 AM 2019/09/26
Emissions below limit from BC (duration)
02:16:35 DD:HH:MM 01:09:50 DD:HH:MM
8 General
The rest of the information demonstrate compliance with the emission license conditions is supplied in the annual emission report which will be sent to your office.
9 & 10 Complainsts and Incidents Register
Refer to addendum A
Boiler Plant Engineering Manager Date
Environmental Manager Date
Engineering Manager Date
Compiled by: Environmental Officer
For: Nkangala District Municipality Air Quality Officer
Copies: Eskom Environmental Management D Herbst
B Mccourt
Group Technology Engineering R Rampiar
E Patel
Duvha Power Station: Engineering Manager
Operating Manager
Maintenance Manager
Production Manager
Boiler Engineering Manager
System Engineer
Environmental Manager
2020/05/2227 May 2020
27 May 2020
ADDENDUM TO MONTHLY EMISSIONS REPORT
9 COMPLAINTS REGISTER
Table 9. Complaints for the month of September 2019
Source Code / Name
Root Cause Analysis
Calculation of Impacts / emissions associated with the incident
Dispersion modeling of pollutants where applicable
Measures implemented to prevent reoccurrence
Date measure will be implemented
No complaints were received during the month of September 2019.
10 S30 INCIDENT OR LEGAL CONTRAVENTION REGISTER
To be completed in the case of a S30 incident or a legal contravention:
Unit no Incident
Start Date Incident End Date
Incident Cause
Remedial action
S30 initial notificatio
n sent
Date S30 investigation report sent
Date DEA Acknowledgm
ent
Date DEA Acceptable
Comments / Reference No.
Unit 4 08/09/2019 10/09/2019
Management failure to timeously identify gap on the SO3 plant.
Develop skills matrix for the SO3 plant to assess the training needs.
09/09/2019 25/10/2019 13/09/2019 13/09/2019 14/7/6/2/4/2/1471 - I6435092019