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A method for swelling modified and strengthened pyrolysis of waste tires to produce oil and carbon black

A waste tire and pyrolysis technology, applied in the field of waste tire resource utilization, can solve the problems of poor product quality and selectivity, long swelling time, easy coking, etc., to save swelling time, improve pyrolysis performance, and reduce energy consumption Effect

Active Publication Date: 2022-05-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) Conventional pyrolysis needs to crush the tire first and strip off the steel wire, which consumes a lot of energy
[0007] (2) The tire pretreatment method is single, which cannot fundamentally improve the tire pyrolysis efficiency
[0008] (3) Different components in the tire (such as steel wire, rubber, carbon black, etc.) have different thermophysical properties. Under the traditional cracking method, all components in the tire are heated simultaneously, and there is no targeted consideration of the heating difference of different components and the difference in the cracking process. effect, poor product quality and selectivity
[0009] (4) Tire rubber is a poor conductor of heat. Under the traditional heating method, the temperature gradient of the material is large, and it is easy to coke, which affects normal operation and low thermal efficiency.
The inventor found that the heavy components in the tire pyrolysis oil swell the waste tires for a longer time, and it is not suitable to use the heavy components to swell the waste tires before pyrolysis

Method used

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  • A method for swelling modified and strengthened pyrolysis of waste tires to produce oil and carbon black
  • A method for swelling modified and strengthened pyrolysis of waste tires to produce oil and carbon black
  • A method for swelling modified and strengthened pyrolysis of waste tires to produce oil and carbon black

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A method for swelling waste tires, the steps are as follows:

[0052] 1) Process the waste tire blocks into the same size (1×1cm small pieces), wash them, and place them in closed storage tanks containing different swelling agents (heavy components of pyrolysis oil (>240°C fraction), coal tar ) in the beaker, the swelling agent has not crossed the surface of the tire block, and stirred evenly with a glass rod;

[0053] 2) Put the beaker in step 1) in a water bath, add the rotor to make full contact, set the temperature of the water bath to 40°C, take out the tire block every 1 hour, wash and weigh it, and record the data for comparison with the swelling under microwave conditions .

[0054] The swelling degree is calculated by the ratio of the mass difference before and after swelling to the mass before swelling, which reflects the swelling effect of different tire blocks.

Embodiment 2

[0056] A method for microwave-enhanced swelling of waste tires, the steps are as follows:

[0057] 1) Process the waste tire blocks into the same size (1×1cm small pieces), wash them, and place them in closed storage tanks containing different swelling agents (heavy components of pyrolysis oil (>240°C fraction), coal tar ) in the beaker, the swelling agent has not crossed the surface of the tire block, and stirred evenly with a glass rod.

[0058] 2) Place the beaker in step 1) in the microwave field, and set the microwave power to 900W. In order to prevent the volatilization of the solvent, first microwave for 20s, control the temperature below 40°C, stop the microwave heating, and when the temperature is lower than 30°C, microwave Heat for 10s, repeat the experiment until the swelling is saturated, and always control the temperature within the range of 0-40°C. In the experiment, the tire blocks were taken out every 3 minutes according to the microwave irradiation time, wash...

Embodiment 3

[0065] A method for swelling modified and strengthened pyrolysis of waste tires to produce oil and carbon black, such as figure 1 As shown, the steps are as follows:

[0066] 1) Weigh 30 g of waste tire blocks before and after swelling, and place figure 2 The shown microwave pyrolysis experimental system includes: a pressure reducing valve 1, a mass flow meter 2, a material 3, a quartz reactor 4, a microwave oven 5, a thermometer 6, a condenser tube 7, a pyrolysis oil collection device 8, a circulation water pump9. The chamber of the quartz reactor is a cylinder with a height of 143mm and a wall thickness of 2mm. There is a porous plate inside, 20mm away from the bottom of the reactor, an air inlet is set in the middle, an air outlet is set at the top of the reactor, and the rest is sealed. The swelling of waste tires uses microwaves to enhance the swelling of waste tires by the heavy components of pyrolysis oil (>240°C fraction).

[0067] 2) Before the start of the experi...

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Abstract

The invention discloses a method for swelling modified and enhanced pyrolysis of waste tires to produce oil and carbon black. The waste tires are swollen, and the swollen waste tires are pyrolyzed to prepare pyrolysis oil and carbon black; wherein, during the swelling process of waste tires , using microwave radiation, the swelling agent is the heavy component of the pyrolysis oil. The invention not only reduces the time for making oil from waste tires, but also improves the production efficiency of pyrolysis oil through swelling modification. At the same time, the cracked carbon pores are more developed.

Description

technical field [0001] The invention relates to resource utilization technology of waste tires, in particular to swelling modification of waste tires, in particular to a method of swelling modification and strengthening pyrolysis of waste tires to produce oil and carbon black. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] In recent years, with the progress of society and economy, the rapid development of the automobile industry has led to an increasing number of scrap tires. It is estimated that the output of waste tires in my country in 2019 is about 340 million. The problem of waste tire disposal has gradually attracted people's attention. Waste tires are high-molecul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/10B01J19/12C09C1/48
CPCC10G1/10B01J19/126C09C1/482
Inventor 宋占龙韩元凯王文龙赵希强孙静毛岩鹏王旭江
Owner SHANDONG UNIV
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