초록 ▼

A fluid catalytic cracking (FCC) unit for the production of hydrocarbon products includes a fluid injection system coupled to a reactor by a standpipe. The fluid injection system includes a plurality of nozzles for injecting oil feedstock into the standpipe to react with a catalyst flowing therethro

A fluid catalytic cracking (FCC) unit for the production of hydrocarbon products includes a fluid injection system coupled to a reactor by a standpipe. The fluid injection system includes a plurality of nozzles for injecting oil feedstock into the standpipe to react with a catalyst flowing therethrough.

대표청구항 ▼

1. A fluid injection system for a fluid catalytic cracking unit having a cracking standpipe into which feed oil, residual oil, steam and a catalyst are directed at elevated pressure and temperature to crack the oil into constituent portions, the fluid injection system comprising: a manifold position

1. A fluid injection system for a fluid catalytic cracking unit having a cracking standpipe into which feed oil, residual oil, steam and a catalyst are directed at elevated pressure and temperature to crack the oil into constituent portions, the fluid injection system comprising: a manifold positioned around the outer periphery of the cracking standpipe, the manifold having inlets and outlets each connected to and continuous with inner passages, wherein each of the inner passages begins with an inlet on an outer peripheral surface of the manifold and terminates with an outlet on an inner peripheral surface of the manifold;a plurality of multiflow control blocks each coupled to the plural inlets for directing feed oil, steam, and residual oil through the inner passages in a controlled manner or for diverting feed oil, steam, or residual oil from the inner passages, the multiflow control blocks disposed radially about the outer peripheral surface of the manifold;a plurality of mixing chambers disposed radially about the manifold, wherein each of the mixing chambers is coupled to a respective outlet and inner passage combination to the control blocks for feed oil, steam, and residual oil, and adapted to atomize the feed oil and residual oil and mix the atomized feed and residual oil with the steam; anda plurality of nozzles each coupled to a respective mixing chamber and extending through a respective aperture in the standpipe for directing the feed and residual oil and steam mixture into the standpipe in a controlled manner, wherein the nozzles are arranged in a spaced manner about the circumference of the standpipe. 2. The fluid injection system of claim 1, wherein each of the control blocks includes a plurality of valves, and further including a hydraulic control system coupled to each of the valves for controlling the operation of the valves and the flow of the feed oil, residual oil, and steam to the standpipe. 3. The fluid injection system of claim 2, wherein the control blocks include respective first and second valves for controlling the flow of the feed oil, residual oil, and steam, respectively, to the standpipe. 4. The fluid injection system of claim 3, wherein each of the control blocks further include a third valve for diverting the feed oil, residual oil, and steam, respectively, from the standpipe. 5. The fluid injection system of claim 4, wherein each of the valves is a dual block and bleed valve. 6. The fluid injection system of claim 5, wherein each of the dual block and bleed valves includes first and second independently movable members for either blocking or allowing the flow of the feed oil, residual oil, or steam through the valve. 7. The fluid injection system of claim 6, wherein each of the dual block and bleed valves further includes a manually operable input for controlling the blocking or the flow of the feed oil, residual oil, or steam by or through the valve. 8. The fluid injection system of claim 1, wherein the control blocks are disposed substantially symmetrically on the manifold about the standpipe. 9. The fluid injection system of claim 8, wherein a feed oil control block, a residual oil control block, and a steam control block are each coupled to a mixing chamber. 10. The fluid injection system of claim 9, further including a refractory liner disposed on an inner surface of the standpipe and having a plurality of apertures each aligned with apertures in the standpipe, and wherein each nozzle is inserted through respective aligned first and second apertures into the standpipe. 11. The fluid injection system of claim 10, further including a plurality of shutoff valves each coupled to a respective nozzle for terminating flow of feed oil, residual oil and steam to the respective nozzle. 12. The fluid injection system of claim 11, further including a plurality of threaded couplings attaching a respective nozzle to an inner portion of the manifold in a removable manner. 13. The fluid injection system of claim 12, further including a removal tool coupled to one of the nozzles and engaging the manifold for removing the nozzle from the manifold in a sealed manner during operation of the fluid catalytically cracking unit and preventing escape of unwanted feed oil, residual oil, and steam from the standpipe. 14. The fluid injection system of claim 13, wherein the removal tool is adapted for replacing the first nozzle with a second nozzle while preventing escape of feed oil, resid oil, and steam from the standpipe. 15. The fluid injection system of claim 1, wherein the feed and residual oil are provided at a pressure between about 50 and 300 psig and at a temperature of about 500° F., and steam is provided at a pressure between about 50 and 350 psig and at a temperature of about 550° F. 16. The fluid injection system of claim 2, wherein the hydraulic control system includes a primary and a backup diversion controller for redundancy in diverting the feed oil in the event of an emergency or fluid catalytic cracking unit shutdown. 17. The fluid injection system of claim 16, wherein the primary and backup feed oil diversion controllers are arranged in parallel or in series.