Device for producing biodiesel by continuous ester exchange of waste oil

Abstract

The invention discloses a device for producing biodiesel through continuous ester exchange of waste oil. The device comprises a 1 # reaction kettle, a 1 # precipitation kettle, a 2 # reaction kettle and a 2 # precipitation kettle, which are sequentially connected through pipelines, wherein the 1 # reaction kettle is provided with a waste grease, catalyst and methanol feeding hole; catalyst feedingdistribution discs, heating coils, stirring devices and temperature measuring openings are arranged in the two reaction kettles, and material passing openings are formed in the bottoms of the two reaction kettles; densimeters for automatic measurement are arranged at the bottoms of the two precipitation kettles and glycerol outlets are formed in the bottoms of the two precipitation kettles; the 2# reaction kettle is provided with a catalyst supplementing feeding hole; a feeding hole is formed in the side surface of the upper part of the 2 # precipitation kettle and is connected with a material passing hole pipeline of the 2 # reaction kettle, a biodiesel outlet is formed in the other side surface, and a middle partition plate is arranged at the middle upper part in the kettle, so that materials flow in the 2 # precipitation kettle in a U shape to facilitate separation and discharge of glycerol and biodiesel. The method has the characteristics of low investment, high automation level,good product quality and stability, low production cost and high conversion rate.

Description

technical field [0001] The invention relates to production equipment for producing biodiesel by using waste oil, in particular to a device for continuously transesterifying waste oil to produce biodiesel. Background technique [0002] Domestic biodiesel production mainly uses waste oil as raw material, and waste oil is mainly a mixture of free fatty acids and glycerides in addition to impurities such as water and sediment. After waste oil is purified, esterification is generally used to convert free fatty acids into biodiesel and water. After the water generated by the reaction is separated, glycerides are converted into biodiesel and glycerol through transesterification. The equipment for producing biodiesel by transesterification mainly includes reactors and reaction towers. The existing problems are: the reactor method is an intermittent production of biodiesel, which has problems such as high labor intensity and unstable quality; the reaction tower method uses high-tempe...

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Problems solved by technology

The equipment for producing biodiesel by transesterification mainly includes reactors and reaction towers. The existing problems are: the reactor method is an intermittent production of biodiesel, which has problems such as high labor intensity and unstable quality; the reaction tower method uses high-temperature and high-pressure equipment, and the investment Large, high energy consumption, high operating requirements

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