OpenLegislation

Division 46

United Kingdom

Original text. Later amendments are not shown.

BAT for coke plants is to reduce the emissions through achieving continuous undisrupted coke production by using the following techniques:

  1. I..

    extensive maintenance of oven chambers, oven doors and frame seals, ascension pipes, charging holes and other equipment (a systematic programme should be carried out by specially-trained detection and maintenance personnel)

  2. II..

    avoiding strong temperature fluctuations

  3. III..

    comprehensive observation and monitoring of the coke oven

  4. IV..

    cleaning of doors, frame seals, charging holes, lids and ascension pipes after handling (applicable at new and, in some cases, existing plants)

  5. V..

    maintaining a free gas-flow in the coke ovens

  6. VI..

    adequate pressure regulation during coking and application of spring-loaded flexible sealing doors or knife-edged doors (in cases of ovens ≤ 5 m high and in good working order)

  7. VII..

    using water-sealed ascension pipes to reduce visible emissions from the whole apparatus which provides a passage from the coke oven battery to the collecting main, gooseneck and stationary jumper pipes

  8. VIII..

    luting charging hole lids with a clay suspension (or other suitable sealing material), to reduce visible emissions from all holes

  9. IX..

    ensuring complete coking (avoiding green coke pushes) by application of adequate techniques

  10. X..

    installing larger coke oven chambers (applicable to new plants or in some cases of a complete replacement of the plant on the old foundations)

  11. XI..

    where possible, using variable pressure regulation to oven chambers during coking (applicable to new plants and can be an option for existing plants; the possibility of installing this technique in existing plants should be assessed carefully and is subject to the individual situation of every plant).

The percentage of visible emissions from all doors associated with BAT is < 5 – 10 %.

The percentage of visible emissions for all source types associated with BAT VII and BAT VIII is < 1 %.

The percentages are related to the frequency of any leaks compared to the total number of doors, ascension pipes or charging hole lids as a monthly average using a monitoring method as described below.

For the estimation of diffuse emissions from coke ovens the following methods are in use:

  • the EPA 303 method

  • the DMT (Deutsche Montan Technologie GmbH) methodology

  • the methodology developed by BCRA (British Carbonisation Research Association).

  • the methodology applied in the Netherlands, based on counting visible leaks of the ascension pipes and charging holes, while excluding visible emissions due to normal operations (coal charging, coke pushing).