A method for co-processing solid waste and coal tar to prepare fuel oil

Abstract

A method for preparing fuel oil by co-processing of solid waste and coal tar includes: (1), extracting phenol of light components of coal tar; (2), subjecting heavy distillate of coal tar to prehydrogenation to promote the process of converting gelatine and asphaltene of heavy distillate into partially hydrogenated polycyclic aromatic hydrocarbon so as to improve hydrogen supply performance of theheavy distillate; (3), mixing liquid-phase products with different boiling ranges with the solid waste in a separator after the hydrogenation so as to obtain a mixture, and feeding the mixture in a co-processing reaction device to obtain gasoline, diesel oil and phenolic products, thereby realizing co-processing of the solid waste and coal tar. According to the method, the process of phenol extraction to the coal tar and the co-processing of hydrogenated heavy distillate and the solid waste are combined, a great quantity of solvent oil with good hydrogen supply capacity is provided for liquefying treatment of the solid waste, molecular utilization of the coal tar, and scaled, clean and effective utilization of the solid waste are both achieved, conversion efficiency of the coal tar and the solid waste is increased greatly, and the method has the advantages of needing low hydrogen consumption, having high oil yield and good economic benefit, and facilitating long-cycle scaled running of device, and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and particularly relates to a method for preparing fuel oil by co-processing solid waste and coal tar. Background technique [0002] Coal tar is a liquid product obtained from coal in the process of high temperature dry distillation. Compared with petroleum-based distillate, coal tar has the characteristics of high heteroatom content, high ash content, high polycyclic aromatic hydrocarbon content, colloid and asphaltene content. , so that when using conventional petroleum hydrotreating catalysts and processes, there are problems such as coke deposition in the reaction system and short service life of the catalyst. At the same time, a large amount of solid waste is generated in daily life, such as waste tires, waste plastics, etc. These solid wastes are difficult to degrade in the natural state, causing more and more harm to the environment, which has always been a headache for governmen...

AI Technical Summary

Problems solved by technology

Due to the lack of effective management, a lot of solid waste mostly flows into the hands of local oil refiners, which wastes resources and pollutes the environment

Although many solid waste processing devices have been established at home and abroad, they are mainly thermal cracking, and there are obvious shortcomings in the following technologies: the solid waste cracking oil production process is intermittent or semi-batch. In the operation process, the production scale is small, and the secondary cracking in the thermal cracking process seriously leads to low product yield, which is easy to cause secondary pollution to the environment. The light fuel oil has poor properties and requires secondary processing, which greatly reduces the equipment cost. economy

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