Staged flow distribution grid assembly and method for ebullated bed reactor

Abstract From the Canadian patent

A staged distribution grid assembly and method for uniform fluid flow distribution upwardly into an ebullated catalyst bed of a reactor. In the staged grid assembly the, gas and liquid mixture flows first through a lower secondary flow distribution grid plate into an interim zone and then, flows upwardly through an upper primary flow distribution grid plate into the reactor ebullated bed. The staged grid assembly contains an upper primary grid plate containing multiple flow tubes covered by bubble caps and a lower, secondary grid plate containing multiple flow tubes. The staged flow distribution grid assembly enables the primary grid to provide a more uniform distribution of gas and liquid …