Patent EA-004781-B1 (EA)
Title: Process for the production of thermally converted light products and electricity
Inventor: BEURSKENS JACOBUS HENRICUS GER
IPC: C01B3/36
Filed: 2002-01-09
Abstract: 1. Process for the production of thermally converted light products from residual feedstock and electricity from syngas obtained from thermal conversion residue as feedstock, in which process flue gas exiting from the electricity producing unit is fed through a heat recovery unit providing at least part of the 50 % of the heat required in the thermal conversion process. 2. Process according to claim 1 in which at least 90 % of the heat required to sustain the thermal conversion process is provided by the heat recovery unit. 3. Process according to claim 1 or 2, in which the heat is provided by a heat recovery unit operating downstream of a gas turbine producing electricity. 4. Process according to one or more of claims 1-3, in which the heat recovery unit also serves to provide heat for a steam cycle. 5. Process according to one or more of claims 1-4, in which the thermal conversion residue used as feedstock for the production of syngas is obtained from the residual feedstock after having obtained thermally converted light products, the residual feedstock preferably being an atmospheric residue or a vacuum residue. 6. Process according to one or more of claims 1-5, in which residual feedstock is fed, after having been led through the heat recovery unit, to a cyclone in which a bottom stream and a top stream are obtained. 7. Process according to one or more of claims 1-6, in which the at least partially converted feedstock is subjected to a distillation treatment to produce at least a gasoline fraction, a gas oil fraction and a bottom stream. 8. Process according to one or more of claims 1-7, in which electricity is produced by operating a gas turbine of which the flue gas is sent to a heat recovery unit containing at least two heat recovery banks, preferably the heat recovery units containing additionally a low level heat recovery unit. 9. Process for the production of thermally converted light products and electricity from a residual feedstock by passing at least part of the residual feedstock through a heat recovery system, thereby allowing initial conversion of the residual feedstock which is thereafter, optionally after passing through a cyclone from which a bottom stream is recovered, sent to a distillation unit in which at least a gasoline fraction, a gas oil fraction and a thermal conversion residue are obtained, subjecting at least part of the thermal residue to a gasification process to obtain syngas which is sent to a gas turbine to produce electricity whilst the flue gas exiting the gas turbine is passed through the heat recovery system to recover heat which is used at least partly for the initial conversion of the residual feedstock, preferably a process in which the bottom stream of the distillation unit is subjected to a treatment under reduced pressure to provide a waxy distillate and a vacuum residue which waxy distillate is recycled, preferably after having been subjected to a heat treatment, to the bottom of the distillation unit, which heat treatment is carried out at least partly in the heat recovery system. 10. Integrated system for producing thermally converted light products and electricity comprising a thermal conversion unit to produce thermally converted light products, a gasification unit to produce syngas as feedstock for the production of electricity, an electricity producing unit using syngas as feedstock and a heat recovery unit which is capable of recovering heat from flue gas exiting the electricity producing unit, which heat is available for at least part of the thermal conversion process. 11. The integrated system according to claim 10 in which preferably containing a heat recovery unit which contains three recovery banks, two capable of providing high level heat for the partial conversion of residual feedstock and vacuum distillate produced during the conversion process, and the third capable of providing low level heat for providing steam.