A water washing device for preparing biodiesel

Abstract

The invention discloses a washing device for preparing biodiesel. The washing device comprises a feeding tank, a water inflow tank, a mixer, a settling separator and a vortex mixer. The feeding tank is communicated with the mixer through a feeding pipe, the water inflow tank is communicated with the mixer through a water inflow pipe, and the mixer is communicated with the tangent line position on the lower portion in the vortex mixer through a pipeline. An overflow device is arranged in the vortex mixer, the lower end of the overflow device is connected with the bottom in the vortex mixer, and the upper end of the overflow device is open. The overflow device is communicated with a mixing barrel through a hollow flow guide pipe, the lower end of the mixing barrel is closed, and the upper end of the mixing barrel is open. A flow guide device is arranged outside the mixing barrel, the upper end of the flow guide device is closed, the lower end of the flow guide device is open, and the flow guide device is located in the middle of the settling separator. An oil outflow pipe is arranged on the upper portion of the settling separator, and a water drainage pipe is arranged on the lower portion of the settling separator. The washing device has the advantages of being full in mixing, complete in separation, high in separation efficiency and low in energy consumption.

Description

technical field [0001] The invention relates to the technical field of biodiesel separation equipment, in particular to a water washing device for preparing biodiesel. Background technique [0002] As a clean and cheap renewable energy, biodiesel has developed rapidly in my country. It is estimated that by 2020, the annual output of biodiesel in my country will reach 12 million tons. The domestic large-scale biodiesel preparation process is based on acid-base catalysis-based transesterification method, that is, animal and vegetable oils and methanol are used as reactants, liquid KOH, liquid NaOH, concentrated H 2 SO 4 etc. as catalysts for transesterification to produce biodiesel. The products after the transesterification reaction include crude biodiesel (the main component is fatty acid methyl ester), glycerol, water and other substances, as well as a part of unreacted methanol. have a significant impact on the quality of [0003] Glycerin and methanol have very good w...

AI Technical Summary

Problems solved by technology

That is, a certain proportion of tap water is passed into the water washing device, and then mechanically stirred. After a period of standing and sedimentation, the biodiesel layer and water layer can be separated from the mixture after mechanical stirring; however, the above method has insufficient mixing of the mixture. , Incomplete separation, low separation efficiency and high energy consumption

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