Integrated preparation method for biological diesel oil and isolated plant

Abstract

The invention belongs to the field of bio-diesel production and discloses an integrated production process and a device, wherein the process includes a step of constructing a continuous reaction system. The process comprises the following steps: (1) adding raw material oil and methanol into the reaction system including independent work units connected with each other through pipelines, pumps and valves, wherein each work unit is composed of a condensation segment, a reaction segment and a separation segment; (2) adding solid nanometer catalyst with a particle diameter of 25 to 50 nm in a reaction tower at an amount of 1 to 6% the weight of the raw material oil, and keeping the molar ratio of alcohol to oil at (6 to 48):1; (3) adding methanol 5 to 8 times the amount of the raw material oil, counter-contacting the methanol steam with the raw material oil, controlling the reaction temperature above the boiling point of methanol, and keeping the temperatures of a separation tower and the reaction tower at 65 to 95 DEG C and the reaction time of 2 to 10 h; (4) adding the catalyst at a height 2 / 3 the main body height of the reaction tower; (5) controlling the pressure in the reaction tower larger than about 25 to 45 mmHg; and (6) online separating glycerol to obtain the neutral bio-diesel. The invention also discloses a special device suitable for the integrated production process.

Description

technical field The invention belongs to the technical field of biodiesel preparation, and in particular relates to an integrated process of biodiesel and a special device thereof. Background technique The production method of biodiesel at home and abroad is basically a chemical method. The common problems are: the reaction temperature is high and the process is complicated; excessive methanol is used in the reaction process, and the subsequent process must have a corresponding alcohol recovery device. High consumption; water and free fatty acids in oil raw materials will seriously affect the yield and quality of biodiesel; product purification is complicated, and esterification products are difficult to recover; by-products generated by the reaction are difficult to remove, and the use of acid-base catalysts produces a large amount of waste water, Waste alkali (acid) liquid, causing secondary pollution to the environment. The existing production process generally adopts "...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the defects of the prior art, and design an integrated process for producing biodiesel and its special device, so as to solve the technical problems in the prior art, such as incomplete catalytic reaction of raw material oil and inability to remove glycerin on-line.

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