Division BAT 78: In order to reduce emissions to air of dust and CO from the decoking of the cracker tubes, BAT is to use one of the techniques to reduce the frequency of decoking given below and one or a combination of the abatement techniques given below.
United Kingdom
| Technique | Description | Applicability | |
|---|---|---|---|
| Techniques to reduce the frequency of decoking | |||
| a. | Optimisation of thermal decoking | Optimisation of operating conditions, i.e. airflow, temperature and steam content across the decoking cycle, to maximise coke removal | Generally applicable |
| b. | Optimisation of mechanical decoking | Optimise mechanical decoking (e.g. sand jetting) to maximise coke removal as dust | Generally applicable |
| Abatement techniques | |||
| c. | Wet dust scrubbing | See Section 12.1 | Only applicable to thermal decoking |
| d. | Cyclone | See Section 12.1 | Generally applicable |
| e. | Fabric filter | See Section 12.1 | Generally applicable |