The invention provides a square
emulsion preparing device comprising a main
stream inflow pipeline, a main
stream contraction section, a main
stream throat pipeline, a main stream
diffusion section, a main stream outflow pipeline and a lateral face lead-in
pipe, wherein the main stream inflow pipeline, the main stream contraction section, the main stream
throat pipeline, the main stream
diffusion section and the main stream outflow pipeline are sequentially communicated; the lateral face lead-in
pipe is arranged at the upper end of the main stream
throat pipeline and is communicated with the main stream throat pipeline; the main stream inflow pipeline, the main stream throat pipeline and the main stream outflow pipeline are square pipelines; the main stream throat pipeline and the main stream
diffusion section are in a quadrangular-
pyramid-like structure; channels I and channels II are respectively arranged on the upper lateral wall faces and the lower lateral wall faces of the main stream inflow pipeline, the main stream contraction section, the main stream throat pipeline, the main stream diffusion section and the main stream outflow pipeline; and the mounting positions of the upper wall face and the lower wall face of the
emulsion preparing device can be adjusted according to demands in a quick
assembly process. According to the square
emulsion preparing device provided by the invention, the main stream inflow pipeline, the main stream outflow pipeline and the main stream throat pipeline are designed to be square pipelines, so that the convenience in
machining can be realized, and a plurality of methyl
alcohol solution lead-in pipelines are arranged on the lateral face of the throat part; and diesel flows through the main stream inflow pipeline, the main stream contraction section, the main stream throat pipeline, the main stream diffusion section and the main stream outflow pipeline, so as to form three-phase methyl
alcohol, water and diesel emulsion.