A method for resource utilization of kerosene co-refining residue modification

Abstract

The invention provides a method for modification and resource utilization of coal-oil coprocessing residues. According to the method, the coal-oil coprocessing residues are micronized and dispersed into micro particles with the diameter of 0.1-10mm through jetting; the micro particles, coal, water and a coal water slurry additive are subjected to roll milling, and coal water slurry is blended, wherein the micro particles are subjected to surface dipping modification in a water solution containing macromolecule surface modifiers; gasifying and coupling integrated utilization is performed to obtain synthesis gas and ash, the synthesis gas can be further converted into products such as methyl alcohol and olefin, the ash is buried or made into cement, and the coal-oil coprocessing residues are subjected to harmless treatment and resource utilization. The defects that due to high adhesiveness caused by high asphaltene content in the coal-oil coprocessing residues, when the water coal slurry is directly blended, the coal-oil coprocessing residues are bonded with coal dust and adhered to milling rods of milling machines, blended slurry has poor stability and high viscosity to cause failure in gasifying utilization and the like are overcome, residue-containing water coal slurry meeting gasification requirements can be prepared directly without change of existing equipment, and resource utilization and harmless treatment of the coal-oil coprocessing residues are truly realized.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste treatment, and in particular relates to a method for resource utilization of kerosene co-refining residue modification. Background technique [0002] Kerosene co-refining technology is an advanced clean utilization of coal and lightening of heavy and low-quality oil. The coal slurry with a concentration of 45% to 50% and a coal particle diameter of less than 100 microns is mixed with residual oil in a certain proportion. Under the condition of temperature and catalyst, the oil and coal slurry pass through the reactor at one time, and the process technology of hydrocracking into light and medium oil and a small amount of hydrocarbon gas at the same time has the advantages of low investment and high energy efficiency. The lightening of heavy and low-quality oil has opened up a new technical route. However, the residue left after conversion of coal and heavy low-quality oil contains a large ...

AI Technical Summary

Problems solved by technology

At the same time, due to the existence of asphaltene, its self-bonding and adhesiveness are relatively large, and it cannot be effectively dispersed into particles. After extrusion, it forms micelles, which greatly limits its transportation and use.

High cohesiveness results in extremely poor grindability of kerosene co-refining residue, and it is easy to form surface adhesion to grinding rods, etc., resulting in failure of grinding rods

The low grindability and high adhesion of kerosene co-refining residue not only make it difficult to effectively disperse in the mill, but also easily bond with coal powder to form agglomerates, resulting in poor stability of coal-water slurry and excessive particle size , high viscosity can not be used for gasification

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