System and method for catalyst loading/mixing
A catalyst loading system comprising: a vessel comprising at least one gas distribution nozzle at or near the bottom of the vessel, a top fluid distributor located at or near the top of the vessel, a catalyst inlet through which catalyst is introduced into the vessel, a first contact point at which catalyst introduced into the vessel first contacts the contents of the vessel, and a discharge outlet whereby catalyst exits the vessel. Methods of preparing catalyst slurry for introduction into a downstream reactor or in-situ activation within the vessel utilizing the catalyst loading system are also disclosed.
1. A catalyst loading system comprising:
a cylindrical vessel comprising at least one gas distribution nozzle at or near the bottom of the vessel,
a loading hopper connected to the vessel without a pump;
a fixed top fluid distributor located at or near the top of the vessel,
a catalyst inlet through which catalyst is introduced into the vessel,
a first contact point at which catalyst introduced into the vessel first contacts the contents of the vessel, and
a discharge outlet whereby catalyst slurry exits the vessel.
2. The system of claim 1 wherein the vessel further comprises temperature control apparatus whereby the contents of the vessel may be maintained at a desired temperature.
3. The system of claim 1 wherein the vessel is a catalyst activation reactor, a catalytic reactor, or both.
4. The system of claim 1 wherein the first contact point is located at a level below the level of the top fluid distributor.
5. The system of claim 1 wherein the top fluid distributor is a liquid distributor.
6. The system of claim 5 wherein the top fluid distributor comprises a plurality of distribution points or nozzles.
7. The system of claim 5 wherein the top fluid distributor comprises at least 8 nozzles.
8. The system of claim 1 further comprising a bottom distributor comprising the at least one gas distribution nozzle.
9. The system of claim 8 wherein the bottom distributor is a gas distributor.
10. The system of claim 9 wherein the bottom distributor comprises at least 8 distribution points or nozzles.
11. The system of claim 1 further comprising at least one level indicator.
12. The system of claim 11 wherein the at least one level indicator is selected from the group consisting of differential pressure switches and liquid level switches.
13. The system of claim 12 further comprising at least one gas purge nozzle at or near the bottom of the vessel for facilitating nozzle and/or valve flushing.
14. The system of claim 13 wherein the gas purge nozzle is in fluid communication with the vessel discharge outlet.
15. The system of claim 1 further comprising an exit of the loading hopper in fluid communication with the catalyst inlet of the vessel.
16. The system of claim 1 wherein the loading hopper is positioned above the vessel.
17. The system of claim 1 wherein the loading hopper further comprises a gas fluidization inlet.
18. The system of claim 1 wherein the loading hopper further comprises at least one level monitor, at least one weight monitor, or both.
19. The system of claim 1 wherein the loading hopper further comprises at least one gas inlet for loading hopper pressurization, fluidization of loading hopper contents, or both.
20. The system of claim 1 wherein the loading hopper further comprises at least one solenoid valve or solids flow control device for intermittently allowing catalyst to exit the loading hopper via the loading hopper exit.