Junked-tire fluidized gasification device and junked-tire fluidized gasification method based on blast furnace slag waste heat utilization

Abstract

The invention provides a junked-tire fluidized gasification device and a junked-tire fluidized gasification method based on blast furnace slag waste heat utilization. The device comprises a slag granulator and a fluidized-bed gasification reactor. After liquid blast furnace slags are granulated into high-temperature slag particles by the device and catalysts are loaded to surfaces of the high-temperature slag particles, fluidized heat exchange between the high-temperature slag particles and tire rubber powder is performed in the fluidized-bed gasification reactor; a gasification reaction of the rubber powder is generated under the action of slag heat carriers and the catalysts to achieve oil-gas coproduction. The junked-tire fluidized gasification device and the junked-tire fluidized gasification method have the advantages that blast furnace waste heat is taken as a heat source for tire gasification, using waste to treat waste is realized, and accordingly, recycling and reducing of junked tires as well as efficient recovery and utilization of the blast furnace waste heat are achieved; moreover, by the heat exchange mode of fluidized gasification, caloric transfer in the reaction process of tire gasification can be promoted obviously, and quality of pyrolytic oil products can be improved remarkably.

Description

technical field [0001] The invention relates to the technical field of solid waste recycling, in particular to a device and method for fluidization and gasification of waste tires based on utilization of blast furnace slag waste heat. Background technique [0002] Waste tires are highly resistant to heat, machinery and degradation, and are difficult to digest naturally. If they are discarded in the natural environment, they will not only occupy land, waste resources, but also form a new kind of "black pollution". Therefore, realizing environmental protection and efficient utilization of waste tires has become a worldwide problem. The reclaimed rubber industry is the most important way to utilize waste tires in my country. The development of this industry has effectively made up for the serious shortage of rubber resources in my country. However, there are two fatal weaknesses in the development of reclaimed rubber industry - secondary pollution and flammable and explosive. ...

AI Technical Summary

Problems solved by technology

[0004] (1) Rotary kiln devices are mostly used in tire cracking devices, and the heat and mass transfer efficiency is relatively low. Under the same processing capacity, it occupies a large area and the processing efficiency is low;

[0005] (2) Tire pyrolysis mostly uses its own pyrolysis product—gas for external heating, relying on heat conduction and heat radiation on the wall of the reactor. The heat transfer efficiency is low, and the temperature rise rate of tire pyrolysis is low, which also leads to the quality of pyrolysis oil products. and poorer quality;

[0006] (3) The added value of oil in waste tire pyrolysis products is the highest, but the oil yield of the existing tire pyrolysis process is generally about 40% to 45%, and the economic benefits are low;

[0007] (4) Most of the gas generated in the tire pyrolysis process is used for tire pyrolysis heating, resulting in low energy recovery rate of the pyrolysis process

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