A biodiesel production system

Abstract

The invention provides a biodiesel production system which comprises a first production unit and a fine biodiesel production unit. The first production unit sequentially comprises a first esterification kettle, a first heat exchanger, a first centrifugal machine, a first temporary storage tank, a methyl alcohol recovery kettle, a second heat exchanger, a first dryer and a second temporary storage tank which are sequentially communicated through pipelines, the first esterification kettle is communicated with a first methyl alcohol tank and a first catalyst adding tank through pipelines, a feeding pipe is arranged at an inlet of the first esterification kettle, the methyl alcohol recovery kettle is communicated with a first condenser, the first condenser is communicated with a first vacuum pump and a first methyl alcohol collection tank, the fine biodiesel production unit comprises a heat exchanger, a short-path distiller, a light component temporary storage tank, a heavy component temporary storage tank and a vacuum pump, the light component temporary storage tank, the heavy component temporary storage tank and the vacuum pump are communicated with the short-path distiller, the heat exchanger is communicated with the short-path distiller through a pipeline, and the second temporary storage tank is communicated with the heat exchanger through a pipeline. According to the production system, the production efficiency of biodiesel is improved, and product yield is increased.

Description

technical field [0001] The invention relates to the technical field of oil light chemical equipment, in particular to a biodiesel production system. Background technique [0002] Biodiesel is a typical "green energy", a clean and environmentally friendly renewable energy, generally obtained from animal and vegetable oils through esterification and transesterification. Compared with petrochemical diesel, biodiesel has the advantages of non-toxic, sulfur-free, aromatic-free, high cetane number, and good combustion performance. It is an environmentally friendly biofuel that can replace petrochemical diesel. [0003] Biodiesel is composed of three elements, C, H, and O, and the content of oxygen element is higher than that of petrochemical diesel, which is conducive to promoting the complete combustion of fuel during combustion, and can effectively reduce hydrocarbons, carbon monoxide, inhalable particulate matter and The content of sulfur dioxide also reduces the generation of...

AI Technical Summary

Problems solved by technology

The temperature of conventional column vacuum distillation is 220-230°C. During the process of vacuum distillation, the reflux ratio is needed to balance, and the phenomenon of entrainment is unavoidable, which will cause the three items of acid value, free glycerin and total glycerin to exceed the standard; During the long-term distillation process, the carbon-carbon double bonds of unsaturated fatty acids in crude methyl esters will undergo polymerization reactions, resulting in the formation of vegetable pitch, which will greatly reduce the product yield.

In the production process, after the esterification or transesterification reaction, it is necessary to neutralize the acid or alkaline catalyst and wash with water to remove the neutralized product, which will inevitably generate a large amount of industrial wastewater, which will increase the cost of wastewater treatment for enterprises

[0008] In addition, the biodiesel currently produced in the industry is a mixture of fatty acid methyl esters with different carbon numbers. The product can only be sold as biodiesel, and the added value is generally not high.

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