Process and device for improving quality of waste oil coal boiling

Abstract

The invention discloses a process and a device for improving the quality of waste oil coal boiling. The waste oil passes through an impurity removal purifier and then enters an oil storage tank, the waste oil is added into a waste oil coal boiling kettle according to the oil-coal mass ratio of (5-100): 1, the waste oil and the crushed lignite are stirred and mixed in a coal boiling device, stirredat the set temperature and then discharged, and solid and liquid are separated through a filter sieve; the adsorbed oil of the solid upgraded coal is collected through a filter press, and the remaining product lignite is obtained; the separated liquid enters an oil-water separation settling tank for standing, coal slime in upper-layer oil is removed through a filter press, pure oil enters a fractionating tower to distill out absorbed micromolecular organic matters, and residual oil enters an oil storage tank for recycling; and mineral substances in the separated water at the lower layer are removed by a filter press to form lignite dehydrated water.

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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