Division 27

United Kingdom

BAT is to reduce SO_X emissions from the melting furnace by using one or a combination of the following techniques:

Technique^f1	Applicability
A description of the techniques is given in Section 1.10.3.
(i) Dry or semi-dry scrubbing, in combination with a filtration system	The technique is generally applicable
(ii) Minimisation of the sulphur content in the batch formulation and optimisation of the sulphur balance	The minimisation of the sulphur content in the batch formulation is generally applicable within the constraints of quality requirements of the final glass product. The application of sulphur balance optimisation requires a trade-off approach between the removal of SO_X emissions and the management of the solid waste (filter dust)
(iii) Use of low sulphur content fuels	The applicability may be limited by the constraints associated with the availability of low sulphur fuels, which may be impacted by the energy policy of the Member State

Table 17

BAT-AELs for SO_X emissions from the melting furnace in the flat glass sector

Parameter	Fuel	BAT-AEL^f2
The lower levels are associated with conditions where the reduction of SO_X has a high priority over a lower production of solid waste corresponding to the sulphate-rich filter dust.
The conversion factor reported in Table 2 (2,5 × 10^–3) has been applied.
The associated emission levels are related to the use of 1 % sulphur fuel oil in combination with secondary abatement techniques.
For large flat glass furnaces, concerns related to the achievable emission levels may require investigating the sulphur balance. Values reported in the table may be difficult to achieve in combination with filter dust recycling.
Parameter	Fuel	mg/Nm³	kg/tonne melted glass^f3
SO_x expressedas SO₂	Natural gas	< 300 – 500	< 0,75 – 1,25
SO_x expressedas SO₂	Fuel oil^f4 ^f5	500 – 1 300	1,25 – 3,25

Annotations

f1: A description of the techniques is given in Section 1.10.3.
f2: The lower levels are associated with conditions where the reduction of SO_X has a high priority over a lower production of solid waste corresponding to the sulphate-rich filter dust.
f3: The conversion factor reported in Table 2 (2,5 × 10^–3) has been applied.
f4: The associated emission levels are related to the use of 1 % sulphur fuel oil in combination with secondary abatement techniques.
f5: For large flat glass furnaces, concerns related to the achievable emission levels may require investigating the sulphur balance. Values reported in the table may be difficult to achieve in combination with filter dust recycling.