Reaction kettle for making biologic diesel oil

Abstract

This invention relates to a reaction kettle for producing biodiesel oil. This reaction kettle comprises a kettle body and a stirrer equipped on the kettle body. The kettle body has a jacket structure, and the steam inlet and the condensing water outlet on the kettle body are through connected with the jacket. The feed inlet, the product outlet and the catalyst inlet on the kettle body are through connected with the reaction chamber. The feed inlet and the catalyst inlet are set at the upper part of the kettle body. The product outlet is set at the bottom of the kettle body. The solvent inlet is set at the lower part and / or bottom of the kettle body. The reaction kettle has such advantages as simple structure, low investment, adequate esterification reaction, and high production efficiency.

Description

technical field [0001] The invention relates to a reactor, in particular to a reactor for producing biodiesel. Background technique [0002] Biodiesel uses various animal and vegetable oils as raw materials, and undergoes esterification modification with low-carbon alcohols such as methanol or ethanol, so that it can finally become a fuel for internal combustion engines-fatty acid methyl ester or ethyl ester. Biodiesel has excellent environmental protection performance, low sulfur content, the emission of sulfur dioxide and sulfide is about 30% lower than that of ordinary diesel, the oxygen content can reach 11%, and the ignition performance is good, so the harmful substances such as HC and CO emitted during combustion Compared with ordinary diesel oil, it is greatly reduced. Since its emission does not contain harmful substances such as sulfur dioxide, lead, and halogen, it is very conducive to environmental protection and meets environmental protection requirements. There...

AI Technical Summary

Problems solved by technology

However, during the esterification reaction, the low-carbon alcohol solvent used has a relatively low boiling point, such as the boiling point of methanol at 64.7°C and the boiling point of ethanol at 78.3°C, while the grease in the reactor is under the action of steam and a catalyst. The reaction temperature is 120°C to 250°C. Therefore, when methanol or ethanol enters the reactor intermittently from the upper part of the reactor body, the liquid surface of methanol or ethanol will immediately be in a gasified state. Although the material and solvent can be mixed by the stirring device, methanol or ethanol Most of the vaporized ethanol accumulates in the upper part of the kettle, and it is difficult to closely contact with the oil in the kettle, so that the most effective combination of materials cannot be obtained, resulting in insufficient esterification reaction

At present, in order to improve the transesterification reaction, it is usual to increase the amount of methanol or ethanol raw materials and prolong the reaction time, etc., but all the materials cannot be fully reacted, so the yield of diesel oil is not high, usually around 80%.

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