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

A waste tire and low temperature technology, applied in the field of comprehensive utilization of resources, can solve the problems of high recycling cost of waste tires, slow tire decomposition speed, high energy consumption of desulfurization, etc., so as to increase the added value of recycling, complete the degree of cracking, reduce The effect of crushing difficulty

Active Publication Date: 2018-07-17
贵州华宇橡胶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for recycling waste tires through ammonia low-temperature desulfurization, comprising the following steps:

[0023] Place the whole waste tire in an environment with a temperature of -10°C for 10 minutes, then place it in a pulverizer and pulverize it into 30-mesh particles, and then place the particles in an ammonia solution at a temperature of 5°C, using a stirring speed of Stir at 100r / min for 20min, then use microwave frequency of 2450Hz to irradiate for 10s, then place it in a magnetic separator for magnetic separation to obtain a mixture; then put the mixture in a grinder and grind it to 60 mesh, Then it is magnetically separated in a magnetic separator, and then desulfurizer is added, and the ultrasonic frequency is 50Hz for 10s to obtain desulfurized materials; then it is continuously added from the top of the circulating fluidized bed, and passed into the bottom of the circulating fluidized bed. Water vapor at a temperature of 100°C is introduced at a ...

Embodiment 2

[0032] A method for recycling waste tires through ammonia low-temperature desulfurization, comprising the following steps:

[0033] Place the whole waste tire in an environment with a temperature of -5°C for 20 minutes, then place it in a pulverizer and pulverize it into 50-mesh particles, and then place the particles in an ammonia solution at a temperature of 10°C, using a stirring speed of Stir at 500r / min for 30min, then use microwave frequency of 2450Hz to irradiate for 20s, then place it in a magnetic separator for magnetic separation to obtain a mixture; then put the mixture in a grinder and grind it to 70 mesh, Then it is magnetically separated in the magnetic separator, and then desulfurizer is added, and the ultrasonic frequency is 80Hz for 20s to obtain the desulfurized material; then it is continuously added from the top of the circulating fluidized bed, and passed into the bottom of the circulating fluidized bed. Water vapor at a temperature of 200°C is introduced ...

Embodiment 3

[0042] A method for recycling waste tires through ammonia low-temperature desulfurization, comprising the following steps:

[0043] Place the whole waste tire in an environment with a temperature of -7°C for 15 minutes, then place it in a pulverizer and pulverize it into 40-mesh particles, and then place the particles in an ammonia solution at a temperature of 8°C. Stir at 300r / min for 25min, then use microwave frequency of 2450Hz to irradiate for 15s, then place it in a magnetic separator for magnetic separation to obtain a mixture; then put the mixture in a grinder and grind it to 65 mesh, Then it is magnetically separated in a magnetic separator, and then desulfurizer is added, and the ultrasonic frequency is 70Hz for 15s to obtain desulfurized materials; then it is continuously added from the top of the circulating fluidized bed, and passed into the bottom of the circulating fluidized bed. Water vapor at a temperature of 150°C is introduced at a rate of 2 cm per kg of desu...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05
Inventor 申建忠袁能汉
Owner 贵州华宇橡胶科技有限公司
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