Dust Control Handbook for Industrial Minerals Mining and Processing

Accidental DamageInadvertent harm to an orifice can be caused by scratching through the use of improper toolsduring installation or cleaning (Figure 2.19).Figure 2.19. Nozzle damage—new versus used [SSCO 2003].Checking Spray Nozzle PerformanceVisual nozzle inspections alone will not always indicate whether the nozzle is performing tospecifications. The spray tips pictured in Figures 2.18 and 2.19 illustrate that factors such aswear that affect performance are not always obvious.Figure 2.20. Good spray tip showing pattern and distribution graph [Schick 2006].Height of bar indicates distribution of water over pattern width and indicatesrelatively uniform flow over the width of the pattern.Figure 2.21. Worn spray tip showing pattern and distribution graph [Schick 2006].Height of bar indicates distribution of water over pattern width and indicates anincrease of and excessive flow in the center of the pattern due to orifice wear.74 Wet Spray Systems