Combined-type hydrogenation treatment method of tire pyrolysis oil

Abstract

The invention discloses a combined-type hydrogenation treatment method of tire pyrolysis oil. According to the combined-type hydrogenation treatment method, gasoline and diesel oil ingredients in tire pyrolysis oil are subjected to treatment; tire pyrolysis oil is delivered through a hydrogenation dechlorination reactor, a thermal low pressure separator, and a hydrotreating reactor successively; an obtained reaction effluent is delivered into a hydrogenation high pressure separator; hydrogen-rich gas obtained via separation is subjected to desulfuration, and is mixed with a part of new hydrogen, and obtained mixed gas is taken as mixed hydrogen and cold hydrogen for cycling; a liquid phase obtained from the bottom of the hydrogenation high pressure separator is subjected to further separation so as to obtain dissolved gas; and an product is subjected to separation via a fractionation unit. According to the combined-type hydrogenation treatment method, organic chloride in waste tire pyrolysis oil, especially organic chloride in the gasoline and diesel oil ingredients, is reduced effectively in the dechlorination reactor, so that the downstream hydrotreating reactor is protected from influences of chlorine ions, and equipment investment on hydrogenation equipment is reduced effectively; heat energy utilization ratio of refined products is increased, fuel gas consumption amount is reduced, equipment operation cost is reduced, modification using of tire pyrolysis oil is realized, and economic benefits and environmental benefits are maximized.

Description

technical field [0001] The invention belongs to the field of oil refining, and relates to a method for upgrading tire pyrolysis oil under hydrogen-rich conditions. Gasoline and diesel components are modified to produce refined naphtha and refined diesel combined hydrogenation method. Background technique [0002] With the development of the automobile industry, the number of waste tires in my country has increased dramatically. In 2012, China produced about 283 million waste tires with a weight of 10.18 million tons. It is expected to exceed 20 million tons by 2020, becoming a country with a large resource of waste tires. Pyrolysis of waste tires is one of the ways to recycle waste tires. Pyrolysis oil is one of the main products generated by the pyrolysis of waste tires, and its density is generally greater than 910kg / m 3 , mainly containing aliphatic hydrocarbons, aromatic hydrocarbons, olefins and colloids, as well as non-hydrocarbon compounds such as sulfur, nitrogen, ...

AI Technical Summary

Problems solved by technology

In the prior art, under the premise of not removing chlorine, the oil containing chlorine, sulfur, nitrogen and other impurities is often hydrogenated and refined in one step at high temperature and high pressure. In this way, high-nickel stainless steel must be used to prevent chlorine corrosion. Reactor and other high-temperature and high-pressure equipment and pipelines, equipment investment is greatly increased

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