Gaseous phase circulation production method for biodiesel and device therefor

Abstract

The invention discloses a gaseous phase circulation production method for biodiesel, which comprises that: firstly, a biodiesel raw material is sent into a reaction kettle, and the biodiesel raw material is heated while a catalyst is added into the reaction kettle; and then, methanol vapor after vaporization is injected into the reaction kettle, and the methanol vapor and the raw material are subjected to ester exchange reaction to generate the biodiesel. The invention also discloses a device for implementing the gaseous phase circulation production method for the biodiesel, which comprises the reaction kettle; a lower part of the reaction kettle is connected with an upper part of a methanol generator; an upper part of the reaction kettle is connected with a cooler which is connected witha methanol recovery tower through a storage tank; the methanol recovery tower is connected with a methanol storage tank through a pump; and the methanol storage tank is connected with a lower part ofthe methanol generator. The gaseous phase circulation production method improves the temperature in the reaction kettle so as to shorten the esterification time, improve the oil rate of the biodiesel,reduce ethanol consumption by 50 percent and greatly improve productivity.

Description

technical field [0001] The invention relates to a biodiesel production method and a device thereof, in particular to a biodiesel gas phase cycle production method and a device thereof. Background technique [0002] The existing biodiesel lipidation reaction process is to inject methanol in liquid phase into the reactor, add 20% methanol into the reactor, and the temperature in the reactor must be controlled below 65°C during lipidation, because methanol is in a liquid state. Add the reaction kettle, when the temperature in the kettle exceeds 65°C, the methanol evaporates before undergoing lipid exchange, and the lipidation reaction in the reactor takes 3-3.5 hours, methanol and water are infinitely miscible, because the temperature in the reactor is low, The materials cannot be completely exchanged with methanol. After the esterification is completed, more slag and miscible water are produced, which are discharged into the waste water pool from the bottom of the reactor, res...

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Problems solved by technology

[0002] The existing biodiesel lipidation reaction process is to inject methanol in liquid phase into the reactor, add 20% methanol into the reactor, and the temperature in the reactor must be controlled below 65°C during lipidation, because methanol is in a liquid state. Add the reaction kettle, when the temperature in the kettle exceeds 65°C, the methanol evaporates before undergoing lipid exchange, and the lipidation reaction in the reactor takes 3-3.5 hours, methanol and water are infinitely miscible, because the temperature in the reactor is low, The materials cannot be completely exchanged with methanol. After the lipidation is completed, more slag and miscible water are produced, which are discharged into the waste water pool from the bottom of the reactor, resulting in the loss of raw materials and methanol.

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