Abstract:
Ce pulvérisateur permet de projeter un produit de revêtement liquide selon un axe de pulvérisation, et comprend un premier passage (P1) d'une lame de produit (L1), qui est centré sur l'axe de pulvérisation, et un deuxième passage (P2) d'éjection d'une lame d'air (L2) qui entoure coaxialement le premier passage. Le pulvérisateur comprend, en outre, un troisième passage (P3) d'éjection d'une autre lame d'air (L3) qui est disposé coaxialement à l'intérieur du premier passage (P1), une buse (3) centrée sur l'axe (Z222) de pulvérisation, et un noyau (5), disposé coaxialement à l'intérieur de la buse de manière que le premier passage est défini entre le noyau et la buse. Le pulvérisateur comprend en outre un vibreur (31) qui est apte à faire vibrer au moins la buse (3) ou le noyau (5).
Abstract:
Removable nozzle tips, spray head assemblies including the nozzle tips and liquid spray guns that include the nozzle tips are described herein. The removable nozzle tips provide and define both the liquid nozzle openings and the center air outlets for the center air of the liquid spray guns and the spray head assemblies. The nozzle tips are removably attached over a liquid nozzle port formed in the spray head assembly and/or on the spray gun platform or body using any suitable attachment mechanism. The removable nozzle tips can be removed from the liquid spray gun or the spray head assembly without disturbing the remainder of the spray gun or the spray head assembly.
Abstract:
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 contactin the downstream surfaces of the outlet ortion.
Abstract:
A method of forming droplets comprises flowing a liquid (65) through a channel (60); spreading the liquid into a thin film in the channel; and impinging the thin film with a flowing gas (100) to atomize the liquid (65) into droplets. The droplets may then be dried to produce dried particles, such as particles comprising a pharmaceutical active agent. The droplets formed by the disclosed process have improved size and/or size distribution characteristics.
Abstract:
In accordance with certain embodiments, a system includes' a spray device (12) having a liquid pathway leading to a liquid exit (416), an air pathway leading to an air exit (414, 418, 420, 422) directed toward a spray region downstream of the liquid exit (416), and an assembly (400) disposed in the liquid pathway adjacent the liquid exit (416). The assembly (400) includes a threadless pintle (502) generally fit into a sleeve (500) in a concentric manner without threads. The assembly (400) also includes a generally annular passage (520) between the threadless pintle (502) and the sleeve (500) and a passage coupled with the generally annular passage (520). The generally annular passage (520) also has a cross-sectional area that alternatingly increases (584) and decreases (586) in a lengthwise direction along the liquid pathway.
Abstract:
The invention suggests a spray element 20, in particular for die spraying devices 10, comprising supply means 42 for liquid working medium and, optionally, supply means 50 for control air, an atomizing device 78/80b connected with supply means 42 for working medium and a switch valve 62 controlable in dependence of pressure, said switch valve 62 having a flexibly biassed valve body 68 for alternatively establishing or interrupting the connection between the supply means 42 for working medium and the atomizing device 78/80b. In spray element 20, the valve body 68 is designed as having inherent flexible bias.
Abstract:
Systems and methods that provide or restore a coating to a component are provided. The systems and methods utilized an atomizing spray device. A gas and a slurry that comprises fluid and ceramic particles are supplied to the atomizing spray device. The slurry and gas are discharged from the spray device to form two-phase droplets. The fluid within the droplets evaporates to prevent the fluid from becoming part of the coating as the droplets traverse through the air and prior to impacting the surface of the component.