Method and equipment for refining biodiesel through palm oil residue and acidic oil

Abstract

The invention relates to a method for refining biodiesel through palm oil residue and acidic oil. The method comprises the following steps: 1) catalytic cracking the palm oil residue and acidic oil into short chain fatty acid with carbon number of lower than 18; 2) esterifying the short chain fatty acid; and 3) converting the esterified short chain fatty acid into biodiesel. Equipment for refining biodiesel through palm oil residue and acidic oil comprises catalytic cracking equipment, pre-esterification reaction equipment, distillation equipment, a tail gas boiler and a water treatment system. The beneficial effects of the method and equipment disclosed by the invention are as follows: before the pre-esterification reaction, the raw oil contains a large amount of such diesel components as olefin, alkane, and the like, due to the cracking reaction, and after the pre-esterification reaction, the fatty acid in the raw oil is converted into such typical components of biodiesel as fatty acid methyl ester, fatty acid alkyl ester, and the like, so as to directly obtain the biodiesel product without successive modification or preparation, and the biodiesel can be mixed and used with diesel in any proportion.

Description

technical field [0001] The invention belongs to the field of renewable energy, in particular to a method and equipment for refining biodiesel from palm oil residue and acidified oil. Background technique [0002] With the sounding of the alarm bell of China's energy crisis, it has increasingly become a consensus to fully develop and utilize clean energy such as biomass and solar energy on the premise of intensive energy utilization. Experts predict that new energy and renewable energy will become a new field for the development of the world and enterprises. [0003] As a developing country, China is faced with the dual tasks of economic growth and environmental growth protection. In order to protect the environment and achieve sustainable economic growth, change the way of energy development and consumption, the development and utilization of renewable energy is a necessary choice. Therefore, it can Renewable energy has broad potential and development prospects. Its main ra...

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Problems solved by technology

[0012] The currently implemented biodiesel production technology that uses palm oil residues and acidified oil as raw materials for the purpose of producing fatty acid methyl esters has a relatively long production time. It needs to break the long carbon molecular chains in fatty acids into small molecular chains with less than 18 carbons. Subsequent processing requires the use of excess methanol and concentrated acid catalysts, and the subsequent separation and purification are relatively difficult. Therefore, it is necessary to create a new model that can quickly complete the conversion process of fatty acid methyl esters and fatty acid alkyl methyl esters. It is necessary to consider the separation and purification issues and directly produce finished products

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