Spray nozzles

摘要

A nozzle for discharging first and second fluids in a spray pattern into a vessel, such as oil and steam in a catalytic cracking unit, includes various configurations for preventing erosion of the outlet portion of the nozzle that otherwise might be due, for example, to contact with a catalyst or other predetermined substance. In one such nozzle, the exterior surface of the outlet portion substantially conforms to the internal contour of the vessel. In another such nozzle, the outlet portion defines a plurality of substantially concentric, substantially elliptical-shaped outlet apertures. In another nozzle, the outlet portion is formed of ceramic and is connected to the inlet portion by a metal connector. In another nozzle, the outlet portion defines a plurality of apertures angularly spaced about a peripheral region of the outlet portion for discharging a substantially flat fan spray pattern, and a second outlet portion extending along an upstream portion of the outlet portion for discharging at least part of its spray to prevent any catalyst from contacting the downstream surfaces of the outlet portion.

主权项

1. A spray nozzle for discharging at least one fluid in an atomized spray, comprising:
a ceramic outlet defining at least one outlet aperture; a metallic inlet defining at least one inlet conduit for receiving the at least one fluid; and a metallic connector that connects the ceramic outlet to the metallic inlet and provides a compressive preload to the ceramic outlet to prevent looseness between the metallic inlet and the ceramic outlet following differential thermal expansion and contraction; wherein the metallic connector comprises a ring and a socket, the ring is sized to fit into the ceramic outlet and the socket, the ceramic outlet has a reverse step on an inside portion, the outlet engages the socket, and the ring has a first diameter at one end that is approximately equal to an inside diameter of the socket, and a second diameter at the opposite end that is larger than a smallest diameter of the outlet to engage the reverse step in the outlet.