an apparatus for producing an emulsion by agitatedly mixing liquid fuel and water . low pollutant level emissions and an efficient combustion system are realized by burning this emulsion . an agitator chamber supplies liquid fuel and water from a liquid fuel tank and a water tank and agitating blades are arranged inside agitator chamber to agitatedly mix liquid fuel and water . movable permanent magnets are fixed on agitator disks and an agitating blade driving motor rotates agitating blades to produce an ionized emulsion . a pump pressurizes the emulsion and a burner sprays it for burning .