Division BAT 27 In order to reduce total emissions of VOCs and energy consumption, BAT is to use technique (a) and one or a combination of the techniques (b) to (d) given below.
United Kingdom
| Technique | Description | Applicability | |
|---|---|---|---|
| (a) | Process-integrated VOC oxidation | The air/solvent mix resulting from solvent evaporation during the repeated enamel curing process is treated in a catalytic oxidiser (see BAT 15 (g)) integrated in the curing oven/dryer. The waste heat from the catalytic oxidiser is used in the drying process to heat up the circulating airflow and/or as process heat for other purposes within the plant. | Generally applicable. |
| (b) | Solvent-free lubricants | Solvent-free lubricants are applied as follows:
| Applicability may be limited due to product quality requirements or specifications, e.g. diameter. |
| (c) | Self-lubricating coatings | A solvent-containing lubrication step is avoided by using a coating system that also contains lubricant (a special wax). | Applicability may be limited due to product quality requirements or specifications. |
| (d) | High-solids enamel coating | Use of enamel coating with a solids content of up to 45 %. In the case of fine wires (with a diameter less than or equal to 0.1 mm), the solids content is up to 30 %. | |
Table 20
BAT-associated emission level (BAT-AEL) for total emissions of VOCs from the manufacture of winding wire
| Parameter | Product type | Unit | BAT-AEL(Yearly average) |
|---|---|---|---|
| Total VOC emissions as calculated by the solvent mass balance | Coating of winding wire with an average diameter greater than 0,1 mm | g VOCs per kg of coated wire | 1–3,3 |
The associated monitoring is given in BAT 10.
Table 21
BAT-associated emission level (BAT-AEL) for VOC emissions in waste gases from the manufacture of winding wire
| Parameter | Unit | BAT-AEL(Daily average or average over the sampling period) |
|---|---|---|
| TVOC | mg C/Nm3 | 5–40 |
The associated monitoring is given in BAT 11.