A method for recycling waste tires through ammonia low-temperature desulfurization

Abstract

The invention relates to the technical field of comprehensive utilization of resources and particularly relates to a method for recycling waste tires through ammonia-process low-temperature desulfurization. According to the method, the waste tires are placed at low temperature and are ground, so that the frangibility of the waste tires is improved, and the grinding difficulty of the waste tires is reduced; the waste tires are mixed with a low-temperature ammonia water solution and are subjected to microwave radiation treatment, so that bond energies of S-S bonds and S-C bonds in the waste tires are damaged, and the bond energy of C-C bonds in the waste tires is protected; by adding a desulfurization agent and carrying out ultrasonic catalysis, the sulfur-containing rate in the waste tires is decreased; by virtue of high-temperature steam treatment in a circulating fluidized bed, the splitting of the waste tires is relatively thorough, and the quality of a prepared carbon black product is improved; particularly, by mixing a secondary desulfurization agent, the sulfur content in carbon black is relatively low, the wide application of the carbon black product in the chemical engineering field is promoted, and the addition value of the recycle of the waste tires is increased.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of resources, in particular to a method for recycling waste tires through low-temperature desulfurization by ammonia method. Background technique [0002] With the rapid development of the automobile industry, the annual output of automobiles has reached more than 80 million units. With the increase of annual output of automobiles, the consumption of automobile tires has also increased year by year, reaching more than 80 million. The tires are landfilled or piled up, which in turn requires a large amount of stacking space to store them, resulting in high processing costs, and the tires decompose slowly due to landfilling, causing serious environmental pollution. Therefore, a large number of researchers recycle waste tires after desulfurization treatment. The main method is to use desulfurizers for desulfurization treatment in the process of pyrolysis or cracking of waste tires. T...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the automobile industry, the annual output of automobiles has reached more than 80 million units. With the increase of annual output of automobiles, the consumption of automobile tires has also increased year by year, reaching more than 80 million. The tires are landfilled or stacked, which in turn requires a large amount of stacking space to store them, resulting in high processing costs, and landfills cause tires to decompose slowly and cause serious environmental pollution.

Therefore, a large number of researchers recycle waste tires after desulfurization treatment. The main method is to use desulfurizers for desulfurization treatment in the process of pyrolysis or cracking of waste tires. This treatment method not only makes a large amount of sulfur components volatilize , and it also requires a lot of energy to break the bond energy of the S-S bond and S-C bond, resulting in a large desulfurization energy consumption, which makes the recycling cost of waste tires higher