Glycerol subsidence coupling ester exchange continuous reaction apparatus

Abstract

The invention relates to a preparation device for biodiesel, in particular to a special reaction device utilizing neutral grease for an ester exchange reaction. An ester exchange continuous type reaction device is to increase a reactor behind the prior reactor; a guide flow cylinder is arranged in the reactor; a reaction product in the previous reactor enters the reactor and then passes through the guide flow cylinder in the reactor first; the bottom of the guide flow cylinder is provided with a material tray; a filler is placed on the material tray; the bottom of the reactor is provided witha glycerin outlet; and a discharge outlet at the upper part of the reactor is connected with a device for a subsequent process. Through the innovation of an internal structure of the reactor, the device realizes the effective separation of glycerin during the ester exchange reaction, improves the once-through conversion rate of the biodiesel, and simplifies the production flow.

Description

1. Technical field [0001] The invention relates to a biodiesel preparation device, in particular to a special reaction device for transesterification using neutral oil. 2. Technical background [0002] To achieve economies of scale for biodiesel, true continuous production must be achieved. The chemical reaction to prepare biodiesel by transesterification of neutral oil is a reversible chemical reaction, and the by-product glycerol produced by the reaction has a great influence on the conversion rate of the reaction. How to effectively remove the glycerol generated in the reaction is one of the key technologies to realize the continuous production of biodiesel and improve the conversion rate of biodiesel. According to reports, the two-stage transesterification process is used in the production of biodiesel by chemical method at home and abroad to achieve the above purpose. For example, Henkel of Germany adopts the two-stage transesterification process of tubular reactor / se...

AI Technical Summary

Problems solved by technology

However, none of the above processes can directly separate glycerin from the reaction system during the reaction, and fail to minimize the negative impact of glycerin.

The research and development of biodiesel in China started relatively late, and at present, the batch production process is mainly used, and there is a big gap between the continuous production process and foreign countries.

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