Preparation method of low-sulfur environment-friendly boiler oil

The invention provides a preparation method of low-sulfur environment-friendly boiler oil, belonging to the technical field of chemical engineering. The preparation method comprises the following steps: S1, preparation of raw materials including herbs and wood, organic wastes, dead fishes and livestock, and hospital garbage; S2, separation and catalysis of the raw materials: separating and catalyzing the raw materials into a variety of distillate oil and residual oil through a raw material separating and catalyzing device; S3, lightening of the distillate oil and the residual oil: converting a part or all of the vacuum distillate oil and the residual oil into light oil through a heavy oil lightening device; S4, oil product modification and oil product refining: modifying and refining the oil through an oil product modification and oil product refining device; S5, oil product blending: blending the oil through an oil product blending device; and S6, desulfurization of heavy oil: carrying out desulfurization on