Sprays, wetting

Self-induced spray wet collectors This is the most common type, and relies on its separating action by the induced air from the fan pulling the contaminated air through a curtain of water. It is simple in operation with no pumps or moving parts except for the fan, which is set on the clean side of the collector. The scrubbing action is dependent on the pressure drop across the collector. When set, this is constant and is determined by the water level within the collector. The removal of sludge is either by automatic ejection or manual drag-out. 

Continuous-spray wet electrostatic precipitators have been applied on many applications, including ... 

Figure 1.55. Typical grade efficiency curves for cyclones and a self-induced spray wet collector 53)...

Disc-core nozzles produce a cone-shaped spray pattern which may be hollow or solid. The spray angle depends on the combination of disc and core used and also, to some extent, on the pressure. Discs made of very hard materials resist abrasion well, so these nozzles are recommended for spraying wet-table powders at high pressures. 

Like many original methods of mechanical process technology, an old technique for the successful removal of airborne dust was first observed in nature. The capacity of rain to clear the air has been used since ancient times to remove suspended dust particles by passing the contaminated gas through a water spray (wet scrubbers). The liquid droplets capture the solid (and some of the gaseous) pollutants and collect them in a sump. While this reduces air pollution it transfers part of the separation problem to a secondary cleaning process the removal of fine particulate solids from a liquid. 

The method of applying vitreous enamel as a slip, usually by spraying. Wet-rubbing Test. A test to determine the degree of attack of a vitreous-enamelled surface after an acid-resistance test (see ASTM - C282). 

Typical fabrication method EVD, plasma spray Wet-sintering Sintering in reducing atmosphere... 

Uses Coemulsifler for personal care and cosmetic prods, such as deodorants/ deodorizing sprays, wet wipes, rInse-off prods., emulsion systems Features Can reduce reliance on preservatives mild can increase efficacy of Zinc Pyrithione (ZPT) in antidandruff shampoos Regulatory Australia AlCS, China lECSC, EU REACh, Korea KECI, Philippines PICCS compliant... 

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