Spray configurations for dual chamber mixing devices

A method of treating a mixing device having a concentric barrel configuration comprising an inner barrel and a concentric outer barrel, the method comprising:

• providing at least one treatment apparatus, each treatment apparatus comprising:
• (i) a manifold having an input end and an output end, a first fluid bore and a second fluid bore formed into the input end of the manifold;
• (ii) a substantially tubular outer conduit body with a manifold end and a nozzle end, the manifold end being connected to the output end of the manifold, the outer conduit body including:
• a plurality of outer nozzles disposed in an annular pattern at the nozzle end of the outer conduit body opposite the manifold end,
• a plurality of outer fluid conduits disposed within the outer conduit body, each of the outer fluid conduits being in fluid communication with both the second fluid bore and one of the plurality of outer nozzles,
• and at least one outer conduit passage formed within the outer conduit body, the at least one outer conduit passage being in fluid communication with both the first fluid bore and at least one of the plurality of outer nozzles;
• wherein the first fluid bore and the at least one outer conduit passage define a first fluid pathway formed between the input end of the manifold and one of the plurality of outer nozzles, and wherein the second fluid bore and each of the plurality of outer fluid conduits define a second fluid pathway formed between the input end of the manifold and one of the plurality of outer nozzles, the first fluid pathway and the second fluid pathway being distinct fluid pathways, the plurality of outer fluid conduits and the at least one outer conduit passage terminating at the outer nozzles disposed at the nozzle end of the outer conduit body such that mixing of fluid from the first fluid pathway and fluid from the second fluid pathway is initiated at the plurality of outer nozzles and occurs upon expulsion of the fluids from the treatment apparatus;
• wherein a recess is formed within and coaxial with the tubular outer conduit body, the recess being configured to receive at least a portion of the mixing device, the recess comprising an opening at the nozzle end of the outer conduit body to receive the concentric barrel configuration of the mixing device;
• the method further comprising
• feeding a first fluid into the first fluid bore such that the first fluid flows along the first fluid pathway and is expelled through the at least one nozzle;
• feeding a second fluid into the second fluid bore simultaneous to feeding the first fluid into the first fluid bore such that the second fluid flows along the second fluid pathway and is expelled through the at least one nozzle simultaneously with the first fluid;
• and
• disposing the at least one nozzle within at least one of the inner barrel or the outer barrel of the mixing device.