An atmospheric-vacuum heat exchange system with a winding-tube heat exchanger, has a first and second heat exchanging group; a primary distillation tower (4) or flash tower; an atmospheric furnace (5); an atmospheric tower (6); a vacuum furnace (7) and a vacuum tower (8); each winding-tube heat exchanger has a shell-pass cylinder (370), a first and second shell-pass connecting tube (371,372), a first and second tube plate (330,340), a plurality of first and second tube box (310,320), a plurality of heat exchange tubes (360) spirally wounded with multiple spiral tube layers; the number of the first and second tube box (310, 320) are respectively N, and each spiral tube layer has N group(s) of the wounded heat exchange tubes (360), N is a natural number greater than or equal to 1. The loss of heat exchanger is reduced.

A system and method for processing pyrolysis gasoline is disclosed. The system and method involves separating a pyrolysis gasoline stream to produce a first stream comprising primarily un-hydrogenated C.sub.9+ compounds. The separating of the pyrolysis e gasoline occurs without hydrogenation being carried out on the pyrolysis gasoline before the separating.

A system and method for processing pyrolysis gasoline is disclosed. The system and method involves separating a pyrolysis gasoline stream to produce a first stream comprising primarily un-hydrogenated C.sub.9+ compounds. The separating of the pyrolysis e gasoline occurs without hydrogenation being carried out on the pyrolysis gasoline before the separating.

A process for reducing the environmental contaminants in a ISO 8217: 2017 Table 2 compliant Feedstock Heavy Marine Fuel Oil and resulting product, the process involving: mixing a Feedstock Heavy Marine Fuel Oil with a Activating Gas to give a feedstock mixture; contacting the feedstock mixture with one or more catalysts to form a Process Mixture; separating the Product Heavy Marine Fuel Oil from the Process Mixture and, discharging the Product Heavy Marine Fuel Oil. The Product Heavy Marine Fuel Oil complies with ISO 8217:2017 Table 2 for residual marine fuel and the Environmental Contaminants, which are selected from the group consisting of: a sulfur; vanadium, nickel, iron, aluminum and silicon and combinations thereof, are less than 0.5 wt. %. The Product Heavy Marine Fuel Oil can be used as blending stock for an ISO 8217:2017 Table 2 compliant, IMO 2020 compliant, low sulfur heavy marine fuel composition.

A process for reducing the environmental contaminants in a ISO 8217: 2017 Table 2 compliant Feedstock Heavy Marine Fuel Oil and resulting product, the process involving: mixing a Feedstock Heavy Marine Fuel Oil with a Activating Gas to give a feedstock mixture; contacting the feedstock mixture with one or more catalysts to form a Process Mixture; separating the Product Heavy Marine Fuel Oil from the Process Mixture and, discharging the Product Heavy Marine Fuel Oil. The Product Heavy Marine Fuel Oil complies with ISO 8217:2017 Table 2 for residual marine fuel and the Environmental Contaminants, which are selected from the group consisting of: a sulfur; vanadium, nickel, iron, aluminum and silicon and combinations thereof, are less than 0.5 wt. %. The Product Heavy Marine Fuel Oil can be used as blending stock for an ISO 8217:2017 Table 2 compliant, IMO 2020 compliant, low sulfur heavy marine fuel composition.

An apparatus for a dividing wall column in an isomerization unit is disclosed. The apparatus includes a at least one primary vertical wall located at a first set of predetermined plurality of trays and configured to separate a feed from a first side cut; one or more walls placed at a second set of predetermined plurality of trays and configured to enable a second side cut wherein each of the one or more walls includes at least one predetermined shape, wherein the dividing wall column produces four cuts wherein one is hexane cut, wherein there are two walls in different sections of the column. The at least one primary vertical wall includes one of a straight wall, an ‘L’ shaped wall, an ‘Γ’ shaped wall, or a zig-zag wall. The one or more walls are mechanically coupled to form a second vertical wall.

Provided is a method for preparing synthesis gas, and more particularly, a method for preparing synthesis gas including: supplying a pyrolysis fuel oil (PFO) stream including a PFO and a pyrolysis gas oil (PGO) stream including a PGO discharged from a naphtha cracking center (NCC) process to a distillation tower as a feed stream (S10); and supplying a lower discharge stream from the distillation tower to a combustion chamber for a gasification process to obtain synthesis gas (S20), wherein the PGO stream is supplied to an upper end of the distillation tower and the PFO stream is supplied to a lower end of the distillation tower.

A dividing wall column system is provided. The dividing wall column system comprises a dividing wall column, a first reboiler, a second reboiler, and a heat pump. The dividing wall column includes a dividing wall positioned in a bottom section of the dividing wall column to divide the bottom section of the dividing wall column into a first side and a second side. The first reboiler is outside of the dividing wall column and in fluid communication with the first side of the bottom section of the dividing wall column. The second reboiler is outside of the dividing wall column and in fluid communication with the second side of the bottom section of the dividing wall column. The heat pump is in fluid communication with the dividing wall column and the second reboiler and configured to compress a first portion of an overhead product from the dividing wall column.

A dividing wall column system is provided. The dividing wall column system comprises a dividing wall column, a first reboiler, a second reboiler, and a heat pump. The dividing wall column includes a dividing wall positioned in a bottom section of the dividing wall column to divide the bottom section of the dividing wall column into a first side and a second side. The first reboiler is outside of the dividing wall column and in fluid communication with the first side of the bottom section of the dividing wall column. The second reboiler is outside of the dividing wall column and in fluid communication with the second side of the bottom section of the dividing wall column. The heat pump is in fluid communication with the dividing wall column and the second reboiler and configured to compress a first portion of an overhead product from the dividing wall column.

Process for deep conversion of heavy hydrocarbon feed, which includes: a) ebullated bed hydroconverting the feed in at least one three-phase reactor containing at least one supported hydroconversion catalyst; b) atmospheric fractionating effluent from a) producing gasoline fraction, gas oil cut, and atmospheric residue; c) vacuum fractionation of at least a portion of the atmospheric residue to obtain a vacuum gas oil fraction and an unconverted vacuum residue fraction; d) deasphalting at least a portion of the unconverted vacuum residue fraction with an organic solvent obtaining a hydrocarbon cut depleted in asphaltenes, termed deasphalted oil, and residual asphalt; and e) liquid/liquid extraction on the hydrocarbon cut depleted in asphaltenes extracting aromatics by a polar solvent producing an extract enriched in aromatics and resins and a raffinate depleted in aromatics and resins, at least a portion of the extract sent to the inlet of the hydroconversion as an aromatic diluent.