Sampling was carried out at Site J on 1 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.
12.1 Introduction
The sample point was in a vertical section of duct at least five diameters from a disturbance to the flow.
Details of the sampling date, times and stack dimensions are:
- Sample date and time:
- Sample 1: 1 April 2003, 9:10-13:19
- Sample 2: 1 April 2003, 14:16-18:16
- Stack dimensions: 0.702 metre diameter circular duct.
12.2 Results
Table 12.1: Particulate emissions from induction furnace
| Sample | Sample mass (g) | Particulate emissions | |
|---|---|---|---|
| (mg/m3, dry, 0°C, 1 Atm) | (kg/h) | ||
| 1 | 0.0018 | 0.38 | 0.0079 |
| 2 | 0.0045 | 1.09 | 0.023 |
| Average | 0.74 | 0.015 | |
Table 12.2: 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 | 48 | 1.4 | 17.8 | 6.9 | 5.8 |
Table 12.3: 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 | 4.6801 | 4.6200 | 101 |
| 2 | 4.1430 | 4.2227 | 98 |
All samples are within the required isokinicity range of 100 ± 10%.
Table 12.4: Combustion gas results
| CO (mg/m3) | SO2 (mg/m3) | NO (mg/m3) | O2 (%) | NO2 (mg/m3) |
|---|---|---|---|---|
| 1.4 | <25 | 4.7 | 21.1 | <9 |
Table 12.5: Summary results from gas melting furnace sample 1
| Concentration (ng/m3) | Emission (ng/hr) | Emission (ng/tonne) | ||
|---|---|---|---|---|
| Sum of PCDD and PCDF congeners | Excluding LOD values | 2.2 | 45,217 | 19,815 |
| Including half LOD values | 2.2 | 45,483 | 19,932 | |
| Including LOD values | 2.2 | 45,749 | 20,048 | |
| Total I-TEQ | Excluding LOD values | 0.059 | 1220 | 535 |
| Including half LOD values | 0.059 | 1225 | 537 | |
| Including LOD values | 0.059 | 1229 | 539 | |
| Total WHO-TEQ | Excluding LOD values | 0.067 | 1388 | 608 |
| Including half LOD values | 0.067 | 1393 | 610 | |
| Including LOD values | 0.067 | 1397 | 612 |
Table 12.6: Results from induction furnace (individual congeners sample 1)
View results from induction furnace (individual congeners sample 1) (large table)
Table 12.7: Summary results from gas melting furnace sample 2
| Concentration (ng/m3) | Emission (ng/hr) | Emission (ng/tonne) | ||
|---|---|---|---|---|
| Sum of PCDD and PCDF congeners | Excluding LOD values | 0.15 | 3121 | 1991 |
| Including half LOD values | 0.17 | 3447 | 2199 | |
| Including LOD values | 0.18 | 3774 | 2408 | |
| Total I-TEQ | Excluding LOD values | 0.0024 | 50.4 | 32.1 |
| Including half LOD values | 0.0040 | 83.0 | 52.9 | |
| Including LOD values | 0.0056 | 116 | 73.7 | |
| Total WHO-TEQ | Excluding LOD values | 0.0024 | 50.4 | 32.1 |
| Including half LOD values | 0.0043 | 89.0 | 56.8 | |
| Including LOD values | 0.0061 | 128 | 81.4 |
Table 12.8: Results from induction furnace (individual congeners sample 2)
View results from induction furnace (individual congeners sample 2) (large table)
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12 Site J
April 2004
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