A process and device for upgrading waste oil by boiling coal

Abstract

The invention discloses a process and a device for improving the quality of coal by cooking waste oil. The waste oil enters the oil storage tank after passing through the impurity removal purifier, and then is added to the waste oil coal cooking kettle according to the oil-coal mass ratio of 5‑100:1, and mixed with the crushed lignite in the coal cooking device. Stir at high temperature, then discharge, and separate the solid and liquid through a filter screen; the solid upgraded coal is then collected by a filter press to collect the adsorbed oil, and the rest is the product lignite; the separated liquid enters the oil-water separation and settling tank for static The oil in the upper layer is removed through the filter press to remove the slime, the pure oil enters the fractionation tower to distill out the absorbed small molecular organic matter, and the remaining oil enters the oil storage tank for recycling; the separated water in the lower layer passes through the filter press After the minerals are removed, it becomes lignite and dehydrated.

Description

technical field [0001] The present invention relates to a process for improving the quality of coal by boiling waste oil, in particular to a process for dehydrating and demineralizing lignite by using waste oil such as frying oil, gutter oil, hog oil, and expired oil as a medium, thereby improving lignite coal quality. craft. It belongs to the fields of waste oil utilization technology and coal processing. Background technique [0002] The return of waste oil to the dining table will seriously endanger people's health. It comes from a wide range of sources, such as frying oil, waste oil, hog oil, and expired oil. "Gutter oil" generally refers to the oil produced and processed from non-food raw materials such as kitchen waste, meat processing waste, and livestock and poultry products that fail inspection and quarantine. Because animal and vegetable fats and oils will produce highly toxic aflatoxin, benzopyrene and other carcinogens through high-temperature oxidation, which ...

AI Technical Summary

Problems solved by technology

At present, there are many research methods for improving the quality of coal by reducing the water content, especially the dehydration and upgrading of lignite. Chinese patent CN104178191A mentions that lignite accounts for 40% of the global reserves and 13% of China's reserves. Due to the high moisture content (about 20% -60%), low calorific value, easy weathering and spontaneous combustion, high transportation cost per unit energy, not conducive to long-distance transportation and storage

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