Thermal conversion for processing straight-run atmospheric residue
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Process Description Feedstock – straight-run atmospheric residue is divided into two streams. The first is fed into absorber 9, where vapors of the paraffin-containing fraction are absorbed. The resulting heavy fraction is mixed with the first stream heated in heat exchanger 11 and directed to fractionation unit 1. Thermal conversion vapors are supplied to unit 1 from reactor 6 as vapor reflux. Gas, diesel fraction, naphtha and heavy gas oil are discharged from unit 1. The latter is mixed with circulating naphtha and circulating residue fed from vessel reactor 6, heated in cracking furnace 2 and sent to separator 3, the residue from which is fed to reactor 6. From unit 1, long residue is mixed with balance residue from reactor 6 and sent to mixer 7, where it is mixed with part of vapors from separator 3. The mixture is fed into separator 4, from which the residue is sent to separator 5. The vapors from separator 5 and part of the vapors from separator 3 are mixed in mixer 8 and then combined with the vapors from separators 6 and 4. The separation residue from separator 5 is fed to absorber 9, from the top of which the unabsorbed vapors are discharged through the vacuum generating unit 10, and from the bottom - the residual product after cooling in heat exchanger 11.
Process features
Processing of straight-run atmospheric residue to produce distillate fractions and secondary atmospheric residue/bituminous raw materials/bitumen
Technical Specification
Feedstock - straight-run AR with density below 920 kg/m³