Abstract: The method and apparatus are used to disperse a liquid component throughout a gaseous component and to supply a uniform mixture of components to a heat exchanger in a process for thermal cracking hydrocarbons. The method for supplying the mixture of components from a nonuniform mixture includes several supply steps. First, the nonuniform mixture is separated into liquid and gaseous components. Then, the flow of gaseous component is accelerated to a high velocity. Next, the liquid component is dispersed through the gaseous component in a region of its high velocity flow to obtain a uniform mixture. Finally, the uniform mixture is supplied to the heat exchanger through an outlet conduit.The method is preferably accomplished with an assembly that is fabricated from a number of components. An inlet conduit supplies the gaseous component to a venturi which accelerates the flow velocity of the gaseous component in the assembly. A liquid supply conduit provides the liquid component to an atomizer in the assembly.