Division BAT 29 In order to reduce emissions to air from the coking production processes, BAT is to use one or a combination of the techniques given below:
United Kingdom
Primary or process-related techniques, such as:
| Technique | Description | Applicability |
|---|---|---|
| (i) Collection and recycling of coke fines | Systematic collection and recycling of coke fines generated during the whole coking process (drilling, handling, crushing, cooling, etc.) | Generally applicable |
| (ii) Handling and storage of coke according to BAT 3 | See BAT 3 | Generally applicable |
| (iii) Use of a closed blowdown system | Arrestment system for pressure relief from the coke drums | Generally applicable |
| (iv) Recovery of gas (including the venting prior to the drum being opened to atmosphere) as a component of refinery fuel gas (RFG) | Carrying venting from the coke drum to the gas compressor to recover as RFG, rather than flaring. For the flexicoking process, a conversion step (to convert the carbonyl sulphide (COS) into H2S) is needed prior to treating the gas from the coking unit | For existing units, the applicability of the techniques may be limited by space availability |