Biodiesel production system including high acid oil pretreatment using biodiesel by-products

摘要

The present invention relates to a system for producing biodiesel after reducing the free fatty acid content of oil (hereinafter, high acid value oil) containing a large amount (2.6 to 60%) of free fatty acids (FAA, Free Fatty Acid). A high acid value oil pretreatment reaction unit including a high acid value reaction tank for producing low acid value oil with reduced free fatty acid content (less than 2.5%) by mixing glycerin with high acid value oil and low acid value oil, methanol and catalyst discharged from the high acid value oil pretreatment reaction unit A low acid value reactor for injecting and mixing, a precipitation tank for precipitating and discharging glycerin, a methanol recovery tank for recovering methanol, a washing tank for washing after methanol recovery, a drying tank for removing water after washing, and a bio-water from which water is removed from the drying tank It consists of a biodiesel synthesis reaction unit including a biodiesel storage tank for storing diesel, and the glycerin separated and discharged from the settling tank is sent to the high acid value oil pretreatment reaction unit to be used. A biodiesel production system comprising a high acid value oil pretreatment process using biodiesel byproducts is about The biodiesel production system including the high acid value oil pretreatment process using the biodiesel by-product according to the present invention uses glycerin to produce a high acid value oil with a high free fatty acid content into a low acid value oil with a low free fatty acid content to produce biodiesel. It can be applied to a large amount of high acid value oil at a relatively low temperature of 90 ~ 105 ° C. by reducing the overtime and performing the mixing reaction of high acid value oil and glycerin using a static mixer and a cavitation reactor, and when producing biodiesel of low acid value oil By using the generated glycerin, the free fatty acid content of the high acid value oil is lowered and the composition of purifying the glycerin is added to produce biodiesel with a high yield.