Division BAT 34 In order to prevent or reduce SOX, HCl and HF emissions to air from the combustion of HFO and/or gas oil in reciprocating engines, BAT is to use one or a combination of the techniques given below.

United Kingdom

Technique	Description	Applicability
a.	Fuel choice	See descriptions in Section 8.4	Applicable within the constraints associated with the availability of different types of fuel, which may be impacted by the energy policy of the Member State
b.	Duct sorbent injection (DSI)	There may be technical restrictions in the case of existing combustion plants Not applicable to combustion plants operated < 500 h/yr
c.	Wet flue-gas desulphurisation (wet FGD)	There may be technical and economic restrictions for applying the technique to combustion plants of < 300 MW_th. Not applicable to combustion plants operated < 500 h/yr. There may be technical and economic restrictions for retrofitting existing combustion plants operated between 500 h/yr and 1 500 h/yr

Technique

Description

Applicability

Fuel choice

See descriptions in Section 8.4

Applicable within the constraints associated with the availability of different types of fuel, which may be impacted by the energy policy of the Member State

Duct sorbent injection (DSI)

There may be technical restrictions in the case of existing combustion plants

Not applicable to combustion plants operated < 500 h/yr

Wet flue-gas desulphurisation (wet FGD)

There may be technical and economic restrictions for applying the technique to combustion plants of < 300 MW_th.

Not applicable to combustion plants operated < 500 h/yr.

There may be technical and economic restrictions for retrofitting existing combustion plants operated between 500 h/yr and 1 500 h/yr

Table 19

BAT-associated emission levels (BAT-AELs) for SO₂ emissions to air from the combustion of HFO and/or gas oil in reciprocating engines

Combustion plant total rated thermal input(MW_th)	BAT-AELs for SO₂ (mg/Nm³)
These BAT-AELs do not apply to plants operated < 1 500 h/yr.
For plants operated < 500 h/yr, these levels are indicative.
The higher end of the BAT-AEL range is 280 mg/Nm³ if no secondary abatement technique can be applied. This corresponds to a sulphur content of the fuel of 0,5 wt-% (dry).
	Yearly average		Daily average or average over the sampling period
	New plant	Existing plant^f1	New plant	Existing plant^f2
All sizes	45–100	100–200^f3	60–110	105–235

Annotations

Footnotes

f1: These BAT-AELs do not apply to plants operated < 1 500 h/yr.
f2: For plants operated < 500 h/yr, these levels are indicative.
f3: The higher end of the BAT-AEL range is 280 mg/Nm³ if no secondary abatement technique can be applied. This corresponds to a sulphur content of the fuel of 0,5 wt-% (dry).

Notes on Division 3.2

Footnotes

f1: As defined in point 26 of Article 2 of Directive 2009/72/EC.
f2: As defined in point 27 of Article 2 of Directive 2009/72/EC.