Sampling was carried out at Site K on 2 and 3 April 2003. Samples were collected from the induction furnace discharge to determine the concentration and mass emission of PCDD and PCDF present in the gases discharged to the atmosphere.
13.1 Introduction
The sampling point was in a vertical section of duct after the baghouse at least three diameters from any disturbance to the flow.
Details of the sampling date, times and stack dimensions are:
- Sample date and time:
- Sample 1: 2 April 2003, 13:12-16:14
- Sample 2: 3 April 2003, 11:16-15:16
- Stack dimensions: 0.775 x 0.25 metre rectangular duct.
13.2 Results
Table 13.1: Particulate emissions from induction furnace
| Sample | Sample mass (g) | Particulate emissions | |
|---|---|---|---|
| (mg/m3, dry, 0°C, 1 Atm) | (kg/h) | ||
| 1 | <0.0023 | <0.60 | <0.00227 |
| 2 | <0.0009 | <0.19 | <0.000631 |
| Average | <0.40 | <0.0015 | |
Note: The sample mass was less than the detection limit.
Table 13.2: Average stack gas conditions at the induction furnace sampling point
| CO2 | Temperature(°C) | Moisture(%) | Velocity(m/s) | Flow rate | ||
|---|---|---|---|---|---|---|
| (%, wet) | (%, dry) | (m3/s) | (m3/s, 0°C, 1 Atm, dry) | |||
| <0.5 | <0.5 | 50.0 | 1.2 | 5.9 | 1.1 | 1.0 |
Table 13.3: Results of isokinicity for induction furnace
| Sample | Actual sample volume (m3, 0°C, 1 Atm, dry) | Calculated sample volume (m3, 0°C, 1 Atm, dry) | Isokinicity (%) |
|---|---|---|---|
| 1 | 3.8043 | 3.9191 | 97% |
| 2 | 4.6741 | 4.5696 | 102% |
All samples are within the required isokinicity range of 100 ± 10%.
Table 13.4: Combustion gas results
| CO (mg/m3) | SO2 (mg/m3) | NO (mg/m3) | O2 (%) | NO2 (mg/m3) |
|---|---|---|---|---|
| <11 | <25 | <12 | 21.1 | <9 |
Table 13.5: Summary results from induction furnace sample 1
| Concentration (ng/m3) | Emission (ng/hr) | Emission (ng/tonne) | ||
|---|---|---|---|---|
| Sum of PCDD and PCDF congeners | Excluding LOD values | 0.21 | 811 | 1230 |
| Including half LOD values | 0.21 | 811 | 1230 | |
| Including LOD values | 0.21 | 811 | 1230 | |
| Total I-TEQ | Excluding LOD values | 0.0079 | 29.9 | 45.3 |
| Including half LOD values | 0.0079 | 29.9 | 45.3 | |
| Including LOD values | 0.0079 | 29.9 | 45.3 | |
| Total WHO-TEQ | Excluding LOD values | 0.0093 | 35.2 | 53.4 |
| Including half LOD values | 0.0093 | 35.2 | 53.4 | |
| Including LOD values | 0.0093 | 35.2 | 53.4 |
Table 13.6: Results from induction furnace (individual congeners sample 1)
View results from induction furnace (individual congeners sample 1) (large table)
Table 13.7: Summary results from induction furnace sample 2
| Concentration (ng/m3) | Emission (ng/hr) | Emission (ng/tonne) | ||
|---|---|---|---|---|
| Sum of PCDD and PCDF congeners | Excluding LOD values | 0.081 | 269 | 399 |
| Including half LOD values | 0.11 | 377 | 559 | |
| Including LOD values | 0.15 | 485 | 718 | |
| Total I-TEQ | Excluding LOD values | 0.00045 | 1.50 | 2.22 |
| Including half LOD values | 0.0012 | 3.93 | 5.82 | |
| Including LOD values | 0.0019 | 6.35 | 9.41 | |
| Total WHO-TEQ | Excluding LOD values | 0.00045 | 1.50 | 2.22 |
| Including half LOD values | 0.0013 | 4.39 | 6.50 | |
| Including LOD values | 0.0022 | 7.27 | 10.8 |
Table 13.8: Results from induction furnace (individual congeners sample 2)
View results from induction furnace (individual congeners sample 2) (large table)
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13 Site K
April 2004
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