Biodiesel esterification reaction device

Abstract

The invention discloses a biodiesel esterification reaction device, which comprises a kettle body, an alcohol feeding distributor and a stirring component, wherein the alcohol feeding distributor enters the kettle body from the middle lower part of the kettle body; and the stirring component is a hydrofoil axial flow stirring paddle. The biodiesel esterification reaction device has the advantages that: the alcohol feeding position of the biodiesel esterification reaction device and the stirring component are improved and are combined with an alcohol feeding state, so that the contact area of reaction materials is increased, an esterification reaction is undergone homogeneously, reaction time is shortened, reaction rate is raised, and reaction energy consumption is lowered; meanwhile, reactants are fully reacted, so that energy waste caused by recovery of unreacted alcohol entering from the upper part of the kettle body is reduced; and uniform stirring is performed, so that the phenomenon of carbonization in the esterification reaction caused by local overheat of the kettle body is avoided, and the temperature of a reaction system is convenient to control.

Description

technical field [0001] The invention relates to a biodiesel esterification reaction device. Background technique [0002] The reaction device of biodiesel esterification reaction adopts common propulsion type agitator, and the feed of alcohol is added dropwise in the upper part of the reaction device at the same time. This existing esterification reaction device will The following problem occurs: [0003] One is that the ordinary push-type agitator causes the droplet size of the alcohol to be large and the specific surface area is small, resulting in a small contact area between the triglyceride and fatty acid and the alcohol, and the reaction speed is extremely slow, resulting in serious power consumption in the esterification process. The output is low under the same equipment situation. In response to this problem, some people have changed the propulsive stirrer to other stirrers, but because the stirring intensity is small, the droplet size of the alcohol is large, the...

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Problems solved by technology

[0003] One is that the ordinary push-type agitator causes the droplet size of the alcohol to be large and the specific surface area is small, resulting in a small contact area between the triglyceride and fatty acid and the alcohol, and the reaction speed is extremely slow, resulting in serious power consumption in the esterification process. Low output under the same equipment

In response to this problem, some people have changed the propulsive stirrer to other stirrers, but because the stirring intensity is small, the droplet size of the alcohol is large, the specific surface area is small, and the reaction is slow. When the stirring intensity is high, the alcohol quickly absorbs heat and vaporizes into the The alcohol recovery unit does not fully participate in the reaction in the esterification reaction unit;

[0004] The second is that the feed of alcohol is added from the top of the reaction device. Since the density of alcohol droplets is smaller than that of triglyceride and fatty acid, after the contact between alcohol and triglyceride and fatty acid, part of the alcohol is immediately vaporized and escapes from the reaction device. out, did not participate in the reaction, resulting in an increase in the load of the alcohol recovery device, resulting in waste of energy; at the same time, the alcohol droplets cannot be quickly distributed to the reaction device to participate in the reaction

In response to this problem, someone once used the method of introducing alcohol into the upper part of the reaction device with a pipeline, but because the pipeline is inserted into the reaction device, the partially vaporized alcohol in the pipeline causes air resistance, and the reaction proceeds slowly;

[0005] The 3rd, because alcohol can only be added in the form of liquid phase, the particle size of the material entering the reaction device is large and uneven, so that the reaction is carried out slowly, not only the energy consumption of the reaction device increases, but also the supply of alcohol increases due to the long reaction time, The energy consumption of the alcohol recovery unit also increases

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