Impingement mixing Applications

Spray. In spray-on applications the reactive ingredients are impingement mixed at the spray head. Thickness of the foam is controlled by the amoimt applied per unit area, and additional coats are used if greater than 2.5-cm (1.0-in.) thickness is required. This method is commonly used for coating industrial roofs or insulating tanks and pipes. 

Sizing, 451, 453, 455, 459, 462 Sonic flow, 461 Types, illustrations, 411-421 Rupture disk, liquids, 462, 466 Rupture disk/pressure-relief valves combination, 463 Safely relief valve, 400 See Relief valve Safety valve, 400, 434 Safety, vacuum, 343 Scale-up, mixing, 312, 314—316 Design procedure, 316-318 Schedules/summaries Equipment, 30, 31 Lines, 23, 24 Screen particle size, 225 Scrubber, spray, 269, 270 Impingement, 269, 272 Separator applications, liquid particles, 235 Liquid particles, 235 Separator selection, 224, 225 Comparison chart, 230 Efficiency, 231... 

In addition, the method of impinging streams can also be used for systems of single phase, such as gas-gas and liquid-liquid impinging streams etc. In fact, single phase impinging streams have great value for practical application in mixing, gas combustion, etc. 

Benet, N., L. Falk, H. Muhr, and E. Plasari (1999). Experimental study of a two-impinging-jet mixing device for application in precipitation processes. Int. Symp. Ind. Cryst. 14th (computer optical disc), 1007-1016 (IChemE, Rugby, UK). 

A significant problem in applications involving multiple impinging jets is the nonuniform heat and mass transfer profiles that can be generated on the impingement surface. To prevent nonuniform heat and mass transfer, the jets need to be well mixed prior to impingement so that a homogenous postflame environment is produced. 

Vibrating bed dryers—originally developed for solids conveying Impinging streams (opposing jets)—originally developed for mixing, eombus-tion applications... 

Similar is the Y-mixer, that is differentiated by the different impinging angle (160° or smaller instead of 180°), and similar to the previous one has been characterized by CFD and by competitive and precipitation reactions [80-82], This type of mixer has been largely used especially for crystallization applications, but generally it has been employed for mixing the reactants that then had to complete the reaction in a tank. 

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