초록 ▼

Apparatus for the preparation of emulsions of oil in water comprises: (a) an oil feed line, (b) a source of concentrated surfactant solution, (c) a source of water, (d) a first low shear mixer for mixing concentrated surfactant and water to form a dilute surfactant solution, (e) means for uniting th

Apparatus for the preparation of emulsions of oil in water comprises: (a) an oil feed line, (b) a source of concentrated surfactant solution, (c) a source of water, (d) a first low shear mixer for mixing concentrated surfactant and water to form a dilute surfactant solution, (e) means for uniting the flows of dilute surfactant solution and oil in a controlled manner, (f) a second low shear mixer for mixing the united flow streams of oil and dilute surfactant solution to form an emulsion of oil in water, (g) a third low shear mixer for mixing the emulsion of oil in water to form a dilute emulsion, and, (h) an arrangement of water feed lines and control valves such that, firstly, water can be supplied either to the first low shear mixer only or, secondly, to both first and third low shear mixers. The apparatus is particularly suitable for the preparation of emulsions of fuel oil in water from oils within a wide range of viscosities which burn with low emissions of NOx and particulates.

대표청구항 ▼

A method for the preparation of an emulsion of an oil in water which method comprises the steps of: (i) mixing concentrated surfactant with water in a first low shear mixer to form a dilute surfactant solution, (ii) uniting a flow of oil having a viscosity in the range of 25 to 250,000 mPa\s at the

A method for the preparation of an emulsion of an oil in water which method comprises the steps of: (i) mixing concentrated surfactant with water in a first low shear mixer to form a dilute surfactant solution, (ii) uniting a flow of oil having a viscosity in the range of 25 to 250,000 mPa\s at the mixing temperature with the flow of dilute surfactant solution in a controlled manner such that a core of surfactant solution flows within an annulus of the oil, the combined flow containing 60 to 98% by volume of oil, (iii) passing the united flow of oil and dilute surfactant solution through a second low shear mixer in such a manner that an emulsion is formed comprising oil droplets surrounded by an aqueous film, the oil droplets having a mean droplet diameter in the range 2 to 50 micron, and a high degree of monodispersity.