Boiler

Emission limit values for medium-sized combustion plants

Emission limit values for medium-sized combustion plants have been identified in the European Directive 2015/2193 / EEC from 28/11/2015. These programs have not previously been regulated at European Union level. Pollutants from medium-sized combustion plants are increasingly contributing to atmospheric pollution. This is mainly due to the increased use of biomass as a fuel that is the result of climate and energy policies.

The transposition of Directive 2015/2193 / EU into Member States' national law was binding until 19 December 2017. In this context, Greece complied with its recent decision – Joint Ministerial Decision 6164 (Government Gazette B / 1107 / 27.03 .2018). This decision concerns the “Limitation of emissions of certain pollutants into the atmosphere from medium-sized combustion plants. Transposition into national law of the European Parliament and Council Directive (EU) 2015/2193 (EEL 313/1 / 28.11.2015) “

Scope of application – Definitions

Medium-sized combustion units

The transposition of Directive 2015/2193 / EEC introduces measures, rules, and procedures for the control of emissions of sulfur dioxide (SO2), nitrogen oxides (NOx) and dust into the atmosphere from medium-sized combustion plants. Rules for the monitoring of carbon monoxide (CO) are also laid down.

The aim of these provisions is to reduce the abovementioned atmospheric emissions and the potential risks they pose to human health and the environment.

Combustion plant
Medium-sized combustion units

Medium-sized combustion plants are defined as combustion units with a nominal thermal capacity equal to or greater than 1 MW and less than 50 MW irrespective of the type of fuels used.

A combination formed by two or more new medium-sized combustion units is considered to be a single medium-sized combustion plant for the purposes of this Decree and their rated thermal input is added for the purpose of calculating the total rated thermal input of the unit when:

  • the flue gases of such medium-sized combustion plants are discharged through a common chimney or
  • taking into account technical and economic factors, the flue gases of such medium-sized combustion plants could, by decision of the competent authority, be discharged through a common stack.

Scope

Medium-sized combustion units are defined as combustion units with a rated thermal input equal to or greater than 1 MW and less than 50 MW. Irrespective of the type of fuel used. A combination formed by two or more new medium-sized combustion units is considered to be a single medium-sized combustion unit.

Their nominal thermal capacity is added to calculate the total nominal thermal power of the unit. This happens when:

(a) the flue gases of such medium-sized combustion plants are discharged through a common chimney or

(b) taking into account technical and economic factors, the flue gases of such medium-sized combustion plants could, by decision of the competent authority, be discharged through a common stack.

Ministerial Decree 6164 (Government Gazette B / 1107 / 27.03.2018) also applies to a combination formed by new medium-sized combustion units. It shall be applied even if the total nominal thermal output is equal to or greater than 50 MW.

Excluding the combination of a combustion plant covered by Chapter III of Joint Ministerial Decision 36060/1155 / E.103 / 2013 (B ‘1450), as amended by Joint Ministerial Decisions 44105/1398 / E.103 / 2013 (B ‘1890), 34062/957 / E103 / 2015 (B' 1793), 181627/1185/2016 (B ‘2494) (Directive 2010/75 / EU).

Emission limit values


All the Emission Limits set out in this section are set at a temperature of 273,15 K and a pressure of 101,3 kPa with a correction for the content of vapors in water vapor and a typical O2 content as follows:

6% for medium-sized combustion plants using solid fuels,


3% for medium-sized combustion plants which are not machines or gas turbines and are fueled with liquid and gaseous fuels

15% for engines and gas turbines.

Emission limit values – Relevant provisions for combustion plants

Small and large-sized combustion units

Conversely, combustion emissions in small units and appliances are covered by implementing measures referred to in European Parliament Directive 2009/125/EC. European Commission Regulation 2015/1189 of 28 April 2015 “on the implementation of Directive 2009/125 / EC of the European Parliament and of the Council establishing ecodesign requirements for the placing on the market and putting into service of the above solid fuel boilers with a rated thermal input of less than or equal to 500 kilowatts (kW).

In addition, the combustion of large combustion plants is covered by Directive 2010/75 / EU of the European Parliament (Article 30 (2) of Directive 2010/75 / EU as of 7 January 2013).

Note

The provisions on medium-sized combustion plants do not apply to research and development activities or to testing activities. A precondition for this is that they do not last for more than two years.

Exemptions for existing medium-sized combustion plants

Existing medium-sized combustion units operating up to 500 hours per year

(a) Existing medium-sized combustion plants operating up to 500 hours per year as a rolling average of five years. They are exempted from complying with the emission limit values set out in the abovementioned tables. The 500-hour time limit is increased to 1,000 hours of operation in the following emergency or extraordinary circumstances:

for back-up power generation in connected islands in the event of a mains electricity supply disruption,

medium-sized combustion units used to produce heat in cases of exceptionally cold weather.

In all cases of existing plants exempted from the compliance obligation, a dust emission limit value of 200 mg / Nm3 shall apply for units fired with solid fuels.

Existing medium-sized combustion plants with a nominal thermal capacity of more than 5 MW

(b) By 1 January 2030, existing medium-scale combustion plants with a nominal thermal capacity exceeding 5 MW shall be exempted from compliance with the emission limit values ​​if at least 50% of the useful heat output of the plant, as a rolling average of five years , is fed as steam or hot water to a public network for the purpose of district heating. In the case of such an exemption, the emission limit values ​​laid down by the competent authority for designating them shall not exceed 1.100 mg / Nm3 for SO2 and 150 mg / Nm3 for the dust.

Existing Medium-sized combustion plants using solid biomass as the main fuel

(c) Until 1 January 2030, medium-sized combustion plants using solid biomass as primary fuel, located in areas where, according to the assessments under Joint Ministerial Decision 14122/549 / E.103 / 2011 (B ‘ 488) as amended by Joint Ministerial Order 174505/607/2017 (B ‘1311) (Directive 2008/50 / EC), compliance with the limit values ​​of this Directive is assured, exempt from the obligation to comply with the limit values dust emissions. In the case of such an exemption, the emission limit values ​​laid down by the competent authority for designating them shall not exceed 150 mg / Nm3 for dust.

Combustion plants with a nominal thermal capacity of more than 5 MW used to operate natural gas compressor stations

(d) Until 1 January 2030, existing medium-scale combustion plants with a nominal thermal capacity exceeding 5 MW used to operate natural gas compressor stations required to ensure the safety and protection of the national natural gas transmission system are exempted from the obligation to comply with the NOx emission limit values.

Exemptions for NEW Medium-sized combustion units

Exemptions for NEW medium-sized combustion plants from the Emission Limit Values

New medium-sized combustion plants operating up to 500 hours per year, as a rolling average of three years, are exempt from the obligation to comply with the emission limit values. In the case of such an exemption, a dust emission limit value of 100 mg / Nm3 shall apply for units fired with solid fuels.

Methane CH4

Methane

Carbon dioxide

Carbon dioxide

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