MTO regenerator multi-pass grids

摘要

A process and device for the regeneration of catalyst is presented. The device includes a series of grids within a regeneration vessel, where each grid includes small openings for the passage of gas, and larger openings for the passage of catalyst. The grids span horizontally across the vessel, and are spaced vertically apart to create a flow of catalyst down through the regenerator.

主权项

1. A catalyst regenerator comprising:
a vessel having a catalyst inlet, a catalyst outlet, a gas inlet and a gas outlet; a plurality of grids disposed within the vessel and extend horizontally across the vessel, and with a vertical spacing between pairs of grids, wherein each grid has an upper surface defined by the top of the grid and a lower surface defined by the bottom of the grid, wherein each grid comprises: a plurality of small openings of sufficient size to allow gas through, but small enough to prevent the passage of catalyst particles, and at least one large opening for allowing catalyst to flow through the grid, wherein each grid does not have a lip or rim extending vertically either above the upper surface or below the lower surface around the large opening.