Gas distributor nozzles

1. A gas distribution system, comprising:

a header having a flow passage contained therein; and

at least one nozzle body partially disposed within the flow passage, wherein:

the at least one nozzle body has a wall defining an inlet end positioned within the flow passage and in fluid communication with the flow passage and an outlet end positioned outside of the header;

the at least one nozzle body has a longitudinal axis that is substantially perpendicular to a direction of flow through the flow passage; and

the at least one nozzle body has an orifice formed radially through the wall and positioned between the inlet end and the outlet end to regulate fluid flow from the flow passage into the at least one nozzle body,

wherein the at least one nozzle body has an upstream side facing the direction of flow and a downstream side not facing the direction of flow and wherein the orifice positioned between the inlet end and the outlet end is positioned on the downstream side of the at least one nozzle body.

2. The gas distribution system of claim 1 , wherein the inlet end defines an inlet orifice.

3. The gas distribution system of claim 1 , wherein the fluid flows into the at least one nozzle body in a direction substantially perpendicular to the longitudinal axis of the at least one nozzle body.

4. The gas distribution system of claim 1 , wherein the orifice is formed through an outer circumferential surface of the at least one nozzle body and wherein the fluid enters the at least one nozzle body only through the orifice.

5. The gas distribution system of claim 1 , wherein:

the fluid flows into the at least one nozzle body in a direction substantially perpendicular to the longitudinal axis of the at least one nozzle body;

the orifice is formed through an outer circumferential surface of the at least one nozzle body; and

the fluid enters the at least one nozzle body only through the orifice.

6. The gas distribution system of claim 1 , wherein the orifice is not positioned within the at least one nozzle body.

7. The gas distribution system of claim 2 , wherein the fluid flow through the orifice is in a direction transverse to the longitudinal axis of the at least one nozzle body.

8. The gas distribution system of claim 2 , wherein the fluid flow through the inlet orifice is transverse to the fluid flow through the orifice.

9. The gas distribution system of claim 2 , wherein the fluid flow has a first portion and a second portion, and wherein only the first portion flows through the inlet orifice and only the second portion flows through the orifice.

10. The gas distribution system of claim 2 , wherein:

the fluid flow through the inlet orifice is transverse to the fluid flow through the orifice;

the fluid flow has a first portion and a second portion; and

only the first portion flows through the inlet orifice and only the second portion flows through the orifice.

11. A method for distributing gas comprising:

introducing a gas into a header having a flow passage contained therein;

positioning a nozzle body in the flow passage, wherein the nozzle body has a wall defining an inlet end and an outlet end and an orifice formed through the wall, the orifice being positioned between the inlet end and the outlet end to regulate fluid flow from the flow passage into the nozzle body;

flowing the gas through the flow passage and into the nozzle body, wherein the nozzle body has a longitudinal axis that is substantially perpendicular to the direction of flow through the flow passage, wherein the gas enters the nozzle body radially through the orifice; and

flowing the gas through an outlet end of the nozzle body that is positioned outside of the header,

wherein the nozzle body has an upstream side facing the direction of flow and a downstream side not facing the direction of flow and wherein the orifice positioned between the inlet end and the outlet end is positioned on a downstream side of the nozzle body.

12. The method of claim 11 , wherein a first portion of the gas flows into the nozzle body through an inlet orifice defined by the inlet end and a second portion of the gas flows into the nozzle body through the orifice positioned between the inlet end and the outlet end.

13. The method of claim 11 , wherein the nozzle body comprises at least two orifices defined by a wall of the nozzle body and positioned between the inlet end and the outlet end.

14. A catalyst regenerator comprising:

a regenerator vessel;

a coked-catalyst inlet coupled to the regenerator vessel and in fluid communication with a reactor;

a regenerated catalyst outlet coupled to the regenerator vessel and in fluid communication with the reactor;

a waste gas outlet coupled to the regenerator vessel; and

a gas distribution system coupled to the regenerator vessel and in fluid communication with a supply of an oxidant, wherein the gas distribution system comprises:

the at least one nozzle body has a wall defining an inlet end positioned within the flow passage and in fluid communication with the flow passage and an outlet end positioned outside of the header;

the at least one nozzle body has a longitudinal axis that is substantially perpendicular to a direction of flow through the flow passage; and

the at least one nozzle body has an orifice formed radially through the wall and positioned between the inlet end and the outlet end to regulate fluid flow from the flow passage into the at least one nozzle body, wherein the at least one nozzle body has an upstream side facing the direction of flow and a downstream side not facing the direction of flow and wherein the orifice positioned between the inlet end and the outlet end is positioned on a downstream side of the at least one nozzle body.

15. The catalyst regenerator of claim 14 , wherein the inlet end defines an inlet orifice.