The invention relates to the technical field of essence preparation equipment, in particular to a self-cleaning preparation device and method for blueberry and mint essence, the self-cleaning preparation device comprises a
mixing tank, at least three supporting legs are fixed to the lower portion of the
mixing tank in an
annular array mode, and an
electric control box is fixed to the middle of the outer side wall of the
mixing tank; a discharging
pipe penetrating into an inner cavity of the mixing tank body is fixed to the lower end face of the mixing tank body, a stirring device is fixed to the center of the interior of the mixing tank body, a cleaning device is fixed to the inner side wall of the mixing tank body, and a material injection
pipe and a maintenance manhole are fixed to a top cover of the mixing tank body. And the center of the bottom in the mixing tank body protrudes upwards to form an inner boss. The stirring mechanism has the beneficial effects that the orientation of the stirring
paddle can be adjusted according to different rotating speeds of the rotating shaft, and when the stirring
paddle rotates, the notch grooves in the stirring
paddle can influence the stability of fluid, so that unstable turbulent flow is formed, and materials can be uniformly and quickly mixed.