PROCESS FOR BURNING COKE PRESENT IN SOLID PARTICLES

摘要

Process and apparatus for the combustion of coke present on solid particles from which hydrocarbons have been substantially removed by heating, and for the production of recoverable heat from hydrocarbon-bearing solid particles, in a series of at least two combustion stages. The process comprises the followng steps: (a) feeding the solid particles into the first combustion stage of the series through an inlet near its bottom; (b) introducing an oxygen-containing gas into the bottom of each combustion stage, whereby at least part of the particles are entrained towards an upper outlet and at least part of the coke on the particles is combusted, yielding a flue gas; (c) passing the particles and the flue gas from the upper outlet of each combustion stage into a separation stage, following each combustion stage; (d) separating the flue gas from the particles in each separation stage, discharging the flue gas at the top of the said stage and withdrawing the particles at the bottom thereof; (e) introducing at least a part of the withdrawn particles into the next combustion stage subsequent to the separation stage through an inlet near its bottom, thereby starting a new sequence essentially the same as in (a) through (d), at least a part of the particles withdrawn from the last separation stage being discharged.