# Commission Implementing Decision (EU) 2017/1442 of 31 July 2017 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council, for large combustion plants (notified under document C(2017) 5225) (Text with EEA relevance), Division BAT 29: In order to prevent or reduce SOX, HCl and HF emissions to air from the combustion of HFO and/or gas oil in boilers, BAT is to use one or a combination of the techniques given below.

Extent: E+W+S+N.I.

Technique
Description
Applicability
a.
Duct sorbent injection (DSI)
See description in Section 8.4
Generally applicable
b.
Spray dry absorber (SDA)
c.
Flue-gas condenser
d.
Wet flue-gas desulphurisation
(wet FGD)
There may be technical and economic restrictions for applying the technique to combustion plants of < 300 MWth.
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
e.
Seawater FGD
There may be technical and economic restrictions for applying the technique to combustion plants of < 300 MWth.
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
f.
Fuel choice
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
Table 15
BAT-associated emission levels (BAT-AELs) for SO2 emissions to air from the combustion of HFO and/or gas oil in boilers
These BAT-AELs do not apply to plants operated < 1 500 h/yr.
For plants operated < 500 h/yr, these levels are indicative.
For industrial boilers and district heating plants put into operation no later than 27 November 2003 and operated < 1 500 h/yr, the higher end of the BAT-AEL range is 400 mg/Nm3.
The higher end of the BAT-AEL range is 175 mg/Nm3 for plants put into operation no later than 7 January 2014.
For industrial boilers and district heating plants put into operation no later than 27 November 2003, which are operated < 1 500 h/yr and for which wet FGD is not applicable, the higher end of the BAT-AEL range is 200 mg/Nm3.
Combustion plant total rated thermal input(MWth)
BAT-AELs for SO2 (mg/Nm3)
Yearly average
Daily average or average over the sampling period
New plant
Existing plant
New plant
Existing plant
< 300
50–175
50–175
150–200
150–200
≥ 300
35–50
50–110
50–120
150–165

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Source: https://www.legislation.gov.uk/eudn/2017/1442/annex/division/3/division/3.1/division/3.1.3/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-1442/annex/division-3/division-3.1/division-3.1.3/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.