Kellogg Brown + Root LLC

The M.w. Kellogg Company

Richard Brian Miller

Yong-Lin Yang

David L Johnson

Phillip Kent Niccum

Eusebius Anku Gbordzoe

Michael Tallman

Chris Robert Santner

Steven Arthur Tragesser

Iwan Hirsan Chan

Paul L Sestili

Suisheng M Dou

Eusebius Gbordzoe

David Lee Johnson

Michael J Tallmann

Apparatus and method are provided for separating and stripping suspensions comprising catalyst particles transported in vapors from the fluid catalytic cracking riser/reactor. Particles are disentrained from vapor in a vortex zoneof the primary cyclonic separator. The disentrained particles enter a stripping zone, wherein the particles are contacted with a stripping gasto recover vapors entrained and adsorbed onto the catalyst. The stripping gasenters stripping zonevia perforations in the wall of the cyclone. The stripping gaslimits the residual catalytic conversion of hydrocarbon vapors and formation of delta-coke on the catalyst. Stripped catalyst is delivered from the cyclone stripping zonevia a diplegconnected to a bottom of the cyclone, and enters an FCC stripping vessel. Solids-lean stripping gas and vapors from the catalyst particles are blended with the carrier fluid and discharged from the cyclone.

Self-stripping FCC riser cyclone

Integration of gas oil and light olefin catalytic cracking zones with a pyrolytic cracking zone to maximize efficient production of petrochemicals is disclosed. Integration of the units in parallel allows production of an overall product stream with maximum ethylene and/or propylene by routing various feedstreams and recycle streams to the appropriate cracking zone(s), e.g. ethane/propane to the steam pyrolysis zone and CColefins to the light olefin cracking zone. This integration enhances the value of the material balances produced by the integrated units.

Integrated catalytic cracking and steam pyrolysis process for olefins

A multi-cyclone gas/solids separator with reduced solids re-entrainment is disclosed. The separator uses a plurality of cyclones spaced horizontally apart from adjacent cyclones to process flue gas containing residual catalyst fines. Each cyclone has a body that has a feed inlet end for admitting gas and entrained solids into an annular space defined by a sidewall of the cyclone body and a cylindrical gas outlet tube axially aligned with the cyclone body. A solids outlet at an opposing end of the cyclone body has a tangential outlet for solids and a minor amount of gas through a sidewall of the cyclone body. A gas reflux opening is axially aligned with the outlet tube. The plurality of cyclones share both a common catch chamber for solids discharged from the solids outlet, and a common manifold for gas and entrained solids. A plurality of shields are positioned in the catch chamber to inhibit discharge of solids from the tangential outlet of the adjacent cyclones into a vicinity of an inlet of the gas reflux opening.

Separation device to remove fine particles

Staged combustion in a single regenerator of a FCC unit is disclosed. The regenerator has a spent catalyst distributor at the top of the catalyst bed, and an air grid at the lower end of the bed. A baffle separates the catalyst bed into upper and lower stages. Excess oxygen is present in the lower bed; partial CO combustion mode is maintained in the upper bed. The baffle inhibits backmixing flux to achieve sufficient staging to burn the catalyst clean under partial CO combustion. This achieves a clean burn of the catalyst in a single regenerator vessel in the partial CO combustion operating mode. Surprisingly, the baffle also reduces catalyst entrainment in the dilute phase, thereby cutting particulate emissions from the regenerator and reducing cyclone wear.

Staged catalyst regeneration in a baffled fluidized bed

A spent catalyst distributor in a fluid catalytic cracking unit regenerator is self aerated by attaching to the underside of each trough arm a contiguous lip which captures rising aeration fluid and uses the aeration fluid to aerate spent catalyst flowing through the trough arms of the spent catalyst distributor. Orifices in the bottom plate of each trough arm pass the captured aeration fluid up into the spent catalyst flowing within the trough arm. The aeration fluid provides aeration and fluidization of the spent catalyst to facilitate the flow of the spent catalyst through the trough arms of the spent catalyst distributor.

Self-aerating spent catalyst distributor

Growing community of inventors

Katy, TX, United States of America

Richard Brian Miller