Abstract:
Methods, systems, and apparatus for cooling particulates are provided. The method can include introducing particulates to a heat exchanger containing a tube bundle having a plurality of tubulars, introducing a coolant to the plurality of tubulars through a coolant inlet, flowing the particulates through the shell side of the heat exchanger, and contacting at least a portion of the particulates with the tube bundle. The method can also include recovering a heated coolant from the coolant outlet and recovering cooled particulates from the particulate outlet. The heat exchanger can include a vessel having an elongated shell having a first end, a second end, one or more sidewalls, a shell side particulate inlet disposed in the one or more sidewalis for receiving particulates, a shell side particulate outlet disposed adjacent the second end for discharging cooled particulates, and a tube bundle including a plurality of tubulars disposed within the vessel.
Abstract:
Methods, systems, and apparatus for cooling particulates are provided. A method can include introducing particulates and water to a first vessel to provide a fluidized bed of particulates and cooling the fluidized bed of particulates in the first vessel to obtain first cooled particulates. The method can also include recovering the first cooled particulates from the first vessel and introducing the first cooled particulates to a heat exchanger comprising a plurality of tubulars. The method can also include introducing a coolant to the plurality of tubulars, flowing the first cooled particulates through a shell side of the heat exchanger and contacting at least a portion of the first cooled particulates with the plurality of tubulars, recovering a heated coolant from the plurality of tubulars, and recovering second cooled particulates from a particulate outlet.
Abstract:
A heat exchanger including a housing. A plurality of tubes can be disposed within the housing. A plurality of solid particulates can be disposed within the housing between an inner surface of the housing and outer surfaces of the tubes, wherein the solid particulates have an average cross-sectional length from about 250 μm to about 5 mm.
Abstract:
Systems and methods for gasifying a feedstock are provided. A gasifier can include a transfer line having a first leg and a second leg. A first end of the first leg can be adapted to be coupled to a cyclone and a second end of the first leg can be coupled to a first end of the second leg. The second end of the second leg can be adapted to be coupled to a standpipe. A centerline through the first leg can be oriented at an angle with a centerline through the second leg of from about 40° to about 140°.
Abstract:
Methods and systems for producing diesel arc provided. The method for producing diesel can include cracking a first hydrocarbon Iced in a first riser under first cracking conditions to provide a first effluent containing a first light cycle oil, a heavy cycle oil, and a first bottoms and fractionating at least a portion of the first effluent to separate the first bottoms and the heavy cycle oil from the first light cycle oil. The method can include cracking the separated first bottoms in a second riser under second cracking conditions to produce a second effluent containing a second light cycle oil and a second bottoms. The method can also include cracking the separated heavy cycle oil in the first riser under third cracking conditions to provide a third effluent and mixing the third effluent with the first hydrocarbon feed to provide the first cracking conditions.