A waste oil pretreatment system

Abstract

The invention discloses a waste oil pretreatment system, comprising a waste oil storage tank, a heating and stirring tank, an oil-water mixer, an ultrasonic demulsification tank, an oil-water separation device and a desulfurization tower. The outlet of the waste oil storage tank is connected to the heating and stirring tank through a pipeline. The inlet is connected; the top of the oil-water mixer is provided with a hot water inlet, the hot water inlet is connected with a hot water pipe, the outlet of the heating and stirring tank is connected with the inlet of the oil-water mixer through a pipeline; the outlet of the oil-water mixer is connected with the inlet of the ultrasonic demulsification tank through a pipeline The upper part of the oil-water separation device is provided with an oil outlet, and the outlet of the ultrasonic demulsification tank is connected to the inlet of the oil-water separation device through a pipeline; the oil outlet is connected to the inlet of the desulfurization tower through a pipeline, and the lower part of the desulfurization tower is provided with an outlet of the desulfurization tower. The invention has the advantages of simple structure, stable operation, convenient maintenance, high heating efficiency of waste oil, good desalination effect, and desulfurization treatment.

Description

technical field [0001] The invention relates to the technical field of waste oil treatment, in particular to a waste oil pretreatment system. Background technique [0002] Waste oil is a recyclable resource, which can be turned into treasure after chemical and physical transformation and physical refining, resulting in considerable economic and social benefits. The production of biodiesel from waste oil is a main way of waste oil resource utilization. The use of waste oil as raw material to produce biodiesel is not only cheap and easy to obtain, but also very beneficial to the comprehensive treatment of waste oil, and the economic benefits are also very considerable. . [0003] However, waste oil contains a large amount of solid substances, fat-soluble substances and water-soluble metal salts. When preparing biodiesel, it will have adverse effects on the equipment and product quality during the operation process, and even lead to serious consequences that the product cannot...

AI Technical Summary

Problems solved by technology

The waste oil pretreatment system has the following defects: (1) The waste oil with impurity particles is dehydrated and removed in the stirring tank, and the flow parallel to the stirring shaft is generated when mixing in the stirring tank (laminar flow mixing form) , the waste oil is heated unevenly (the temperature of the waste oil close to the tank wall is higher), the heating efficiency is low, and the waste oil and hot water cannot be fully mixed, and the soluble salt in the waste oil cannot be fully removed; (2) The centrifugal separation method ( centrifuge) for oil-water separation to remove water, high noise and power consumption, difficult maintenance; (3) oil-water separation effect is poor, water will be entrained in the waste oil (high water content), and additional drying (vacuum dryer) is required ) processing, cumbersome operation and high energy consumption

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