Sampling was carried out at Site G on 26 and 27 March 2003. Samples were collected from the induction furnace baghouse discharge to determine the concentration and mass emission of PCDD and PCDF present in the gases discharged to the atmosphere.
9.1 Introduction
The sampling ports were after the baghouse and were at least 5 stack diameters from any disturbance to the flow.
Details of the sampling date, times and stack dimensions are:
- Sample date and time:
- Sample 1: 26 March 2003, 9:42-14:46
- Sample 2: 27 March 2003, 6:32-10:00
- Stack dimensions: 0.575 metre diameter circular duct.
9.2 Results
Table 9.1: Particulate emissions from induction furnace
| Sample | Sample mass (g) | Particulate emissions | |
|---|---|---|---|
| (mg/m3, dry, 0°C, 1 Atm) | (kg/h) | ||
| 1 | 0.0017 | 0.6 | 0.0017 |
| 2 | 0.0003 | 0.1 | 0.00044 |
| Average | 0.3 | 0.0010 | |
Table 9.2: 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 | 29.1 | 1.5 | 3.7 | 1.0 | 0.9 |
Table 9.3: 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 | 3.0647 | 3.0638 | 100% |
| 2 | 2.1362 | 2.1003 | 102% |
All samples are within the required isokinicity range of 100 ± 10%.
Table 9.4: Combustion gas results
| CO (mg/m3) | SO2 (mg/m3) | NO (mg/m3) | O2 (%) | NO2 (mg/m3) |
|---|---|---|---|---|
| <11 | <25 | <12 | 21.1 | <9 |
Table 9.5: Summary results from induction furnace sample 1 particulate and rinses
| Concentration (ng/m3) | Emission (ng/hr) | Emission (ng/tonne) | ||
|---|---|---|---|---|
| Sum of PCDD and PCDF congeners | Excluding LOD values | 0.139 | 423 | 875 |
| Including half LOD values | 0.322 | 978 | 2022 | |
| Including LOD values | 0.505 | 1532 | 3169 | |
| Total I-TEQ | Excluding LOD values | 0.0033 | 10.1 | 20.9 |
| Including half LOD values | 0.0046 | 14.0 | 28.9 | |
| Including LOD values | 0.0059 | 17.8 | 36.8 | |
| Total WHO-TEQ | Excluding LOD values | 0.0033 | 10.1 | 20.9 |
| Including half LOD values | 0.0048 | 14.6 | 30.1 | |
| Including LOD values | 0.00628 | 19.1 | 39.4 |
Table 9.6: Results from induction furnace (individual congeners sample 1 particulate and rinses)
Table 9.7: Summary results from induction furnace sample 1 gaseous (trap)
| Concentration (ng/m3) | Emission (ng/hr) | Emission (ng/tonne) | ||
|---|---|---|---|---|
| Sum of PCDD and PCDF congeners | Excluding LOD values | 0.12 | 354 | 732 |
| Including half LOD values | 0.13 | 397 | 821 | |
| Including LOD values | 0.14 | 440 | 910 | |
| Total I-TEQ | Excluding LOD values | 0.00031 | 0.941 | 1.95 |
| Including half LOD values | 0.0020 | 5.94 | 12.3 | |
| Including LOD values | 0.0036 | 10.9 | 22.6 | |
| Total WHO-TEQ | Excluding LOD values | 0.00031 | 0.941 | 1.95 |
| Including half LOD values | 0.0021 | 6.41 | 13.3 | |
| Including LOD values | 0.0039 | 11.9 | 24.6 |
Table 9.8: Results from induction furnace (individual congeners sample 1 gaseous (trap)
View results from induction furnace (individual congeners sample 1 gaseous (trap) (large table)
Table 9.9: Summary results from induction furnace sample 2 particulate and gaseous
| Concentration (ng/m3) | Emission (ng/hr) | Emission (ng/tonne) | ||
|---|---|---|---|---|
| Sum of PCDD and PCDF congeners | Excluding LOD values | 0.0585 | 183 | 523 |
| Including half LOD values | 0.0945 | 295 | 846 | |
| Including LOD values | 0.131 | 408 | 1168 | |
| Total I-TEQ | Excluding LOD values | 0.000238 | 0.744 | 2.13 |
| Including half LOD values | 0.00194 | 6.07 | 17.4 | |
| Including LOD values | 0.00365 | 11.4 | 32.7 | |
| Total WHO-TEQ | Excluding LOD values | 0.000238 | 0.744 | 2.13 |
| Including half LOD values | 0.00216 | 6.74 | 19.3 | |
| Including LOD values | 0.00408 | 12.7 | 36.5 |
Table 9.10: Results from induction furnace (individual congeners sample 2 particulate and gaseous)
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9 Site G
April 2004
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