Regenerated catalyst thermoregulation device for catalytic cracking equipment

[0014] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The accompanying drawings are drawn only to illustrate the basic content of the present invention and do not limit the scope of the present invention.

[0015] As shown in the figure, the temperature adjustment equipment for regenerating catalyst of the catalytic cracking unit of the present invention includes a regenerator dense phase bed 1 and a riser reactor reaction section 12. A partition plate 14 is arranged in the regenerator dense phase bed 1 to divide the regenerator dense phase The bed 1 is divided into two zones, one zone is the regeneration coking zone, the other zone is the catalyst desuperheater zone 7, and the lower part of the partition plate 14 is provided with a desuperheater catalyst inlet 4. The catalyst desuperheater zone 7 is provided with a heat pipe 5, along the vertical height of the catalyst desuperheater zone 7, a fluidization ring 6 is arranged in sections, a feed nozzle 11 is arranged in the middle of the reaction section 12 of the riser reactor, and a pre-lifter 10 is arranged in the lower part. , The pre-lifter 10 communicates with the catalyst desuperheater zone 7 through the regenerated catalyst delivery pipe 8 and the regeneration slide valve 9.

[0016] The main operation process of using the catalytic cracking unit shown in the figure to regenerate the catalyst temperature adjustment equipment is: the spent catalyst is burnt and regenerated in the regenerated coking zone in the dense bed 1 of the regenerator, and the regenerated catalyst passes through the lower part of the partition 14 The desuperheater catalyst inlet 4 enters the catalyst desuperheater zone 7, and the catalyst desuperheater zone 7 is provided with a heat pipe 5, and the desuperheater zone 7 is adjusted by adjusting the air volume of the fluidizing air entering through the segmented fluidization ring 6 in the cooling zone. The height of the inner catalyst bed can adjust the catalyst submerged area and heat transfer coefficient of the heat pipe 5, and adjust the amount of heat to reduce the temperature of the catalyst to 630-660°C and then enter the riser through the regeneration catalyst delivery pipe 8 and the regeneration slide valve 9 for reaction The pre-lifter 10 at the lower part of the reactor is mixed and contacted with the raw materials atomized through the feed nozzle 11 after pre-lifting and rectification, and gasified and reacted in the reaction section 12 of the riser reactor; The reaction temperature is automatically controlled by the regeneration slide valve 9. This method of flexibly increasing the catalyst-oil ratio is particularly suitable when the dense bed has a surplus of coking capacity or the regenerated dense bed is only used as the buffer volume of the regenerated catalyst.