PLUG FLOW REACTOR WITH INTERNAL RECIRCULATION FLUIDIZED BED

摘要

A reactor comprises an outer sidewall and a bottom wall enclosing a hollow chamber comprising a lower fluidized bed zone and an upper freeboard zone. A plurality of inlets is provided for injecting at least one fluidizing medium into the fluidized bed zone and creating a swirling flow. At least one feed inlet communicates with the fluidized bed zone; and at least one product outlet is provided for removing a product from the chamber, the outlet(s) communicating with either the fluidized bed zone or the freeboard zone. The reactor has at least one internal barrier located inside the hollow chamber, and at least partly located in the fluidized bed zone. The internal barrier(s) have at least one opening within the fluidized bed zone, such as an underflow opening, to permit internal recirculation of material from the product zone to the feed zone, thereby simplifying reactor structure.

主权项

1. A reactor comprising:
an outer sidewall and a bottom wall enclosing a hollow chamber in the form of a closed loop for circulation of a fluidized bed, the hollow chamber comprising a lower fluidized bed zone and an upper freeboard zone, wherein the outer sidewall has a substantially cylindrical shape, and has a central axis; a plurality of fluidizing medium inlets for injection of at least one fluidizing medium into the fluidized bed zone, wherein the fluidizing medium inlets comprise gas and/or liquid injectors which are directed in a direction of the swirling fluid flow and which are adapted to create a circumferential, swirling flow of material in the fluidized bed zone; at least one feed inlet communicating with the fluidized bed zone; at least one product outlet for removing a product from the chamber, wherein the at least one product outlet communicates with either the fluidized bed zone or the freeboard zone; and at least one internal barrier located inside the hollow chamber and at least partly located in the fluidized bed zone, wherein each said internal barrier is positioned to face in a direction of said swirling flow, and each said barrier has at least one opening within the fluidized bed zone.