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Method for preparing fuel oil and carbon black by low-temperature catalytic pyrolysis of automobile waste tires

A technology for low-temperature catalysis and waste tires, which is applied in the petroleum industry, treating hydrocarbon oil, and fibrous fillers. It can solve the problems of slow reaction rate, land occupation, and high cracking temperature, and achieves less catalyst consumption, greater economic value, and The effect of high carbon black quality

Active Publication Date: 2018-05-11
GEM WUHAN URBAN MINE RECYCLING IND PARK DEV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous increase of the number of cars in our country, the number of waste tires produced after the scrapping of cars is increasing day by day, and the accumulation of waste tires is large. If they are not disposed of in time, they will not only occupy land but also cause pollution to the environment.
At present, there are several treatment methods for waste tires: (1) retreading, tire retreading meets the requirements of environmental protection and economy, but compared with natural rubber, recycled rubber is somewhat deficient, and the number of retreadings generally does not exceed two; (2) incineration , after the tire is crushed, it can be used as fuel for daily use. This method is simple and easy, but because a large amount of harmful gas will be produced during the incineration process, it has no advantages in terms of environmental protection; (3) thermal cracking, thermal Pyrolysis is a new industrial technology route for processing waste tires. It can recover oil, gas, carbon black and other products. It is favored by people because of its high economic benefits and the ability to maximize resource utilization. However, the current pyrolysis process has reactions Many disadvantages such as slow rate, high cracking temperature, low quality and yield of pyrolysis oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Separate the waste tires from the steel wires and crush them into waste rubber particles of 5-30 meshes, add 0.3% nickel chloride to mix with them, then add them to the cracking furnace, and heat them at a temperature of 400°C and a pressure of 0MPa-0.01MPa. Cracking for 30 minutes, the high-temperature oil gas and fine carbon black produced during the cracking process are discharged from the oil and gas outlet of the cracking furnace, enter the high-temperature gas-solid separator, and separate high-temperature oil gas and fine carbon black, and the high-temperature oil gas enters the fractionating tower to condense to obtain fuel oil. The coarse carbon black in the cracking slag produced in the cracking furnace is discharged from the slag outlet of the cracking furnace, crushed into fine carbon black, and mixed with the aforementioned fine carbon black to obtain a carbon black product. The yield of pyrolysis products is: fuel oil 42%, carbon black 36%.

Embodiment 2

[0022] Separate the waste tires from the steel wires and crush them into 5-30 mesh waste rubber particles, add 0.5% nickel chloride to mix with them, and then add them to the cracking furnace at a temperature of 450°C and a pressure of -0.01MPa to 0MPa. Thermal cracking for 35 minutes. The high-temperature oil gas and fine carbon black produced during the cracking process are discharged from the oil and gas outlet of the cracking furnace and enter the high-temperature gas-solid separator to separate high-temperature oil gas and fine carbon black. The coarse carbon black in the pyrolysis slag produced in the process is discharged from the slag outlet of the pyrolysis furnace, crushed into fine carbon black, and mixed with the aforementioned fine carbon black to obtain a carbon black product. The yield of pyrolysis products is: fuel oil 49%, carbon black 33%.

Embodiment 3

[0024] Separate the waste tires from the steel wires and break them into 5-30 mesh waste rubber particles, add 0.8% nickel chloride to mix with them, and then add them to the cracking furnace for thermal cracking at a temperature of 520°C and a pressure of -0.01MPa For 40 minutes, the high-temperature oil gas and fine carbon black produced during the cracking process are discharged from the oil and gas outlet of the cracking furnace and enter the high-temperature gas-solid separator to separate high-temperature oil gas and fine carbon black. The high-temperature oil gas enters the fractionation tower to condense to obtain fuel oil. The coarse carbon black in the generated pyrolysis slag is discharged from the slag outlet of the cracking furnace, crushed into fine carbon black, and mixed with the aforementioned fine carbon black to obtain a carbon black product. The yield of pyrolysis products is: fuel oil 52%, carbon black 35%.

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PUM

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Abstract

The invention discloses a method for catalyzing and thermally cracking automobile waste tires at low temperature into gas and oil. The method comprises the following steps: (1) separating steel wires from the waste tires and crushing the waste tires into 5-30-mesh waste rubber particles; (2) adding the waste rubber particles and nickel chloride serving as a catalyst into a cracking furnace, and thermally cracking when the temperature is 400 DEG C to 500 DEG C and the pressure is -0.01 MPa to 0.01 MPa; (3) discharging high-temperature oil and gas as well as fine carbon black generated in the cracking process via an oil-gas discharging opening of the cracking furnace, introducing the oil, the gas and the fine carbon black into a high-temperature gas-solid separator, separating the high-temperature oil and gas as well as the fine carbon black, introducing the high-temperature oil and gas into a fractionating tower, and carrying out condensation to obtain fuel oil; and (4) discharging cracked residue coarse carbon black generated in the cracking process out of a residue discharging opening of the cracking furnace, crushing the coarse carbon black into the fine carbon black, and mixing the crushed fine carbon black with the fine carbon black in the step (3) to obtain a carbon black product. Through the adoption of the method of simultaneously catalyzing and thermally cracking, the activation energy of the reaction can be reduced; the quality and the yield of thermally-cracked oil products can be improved.

Description

technical field [0001] The invention relates to the technical field of thermal cracking of rubber, and more particularly relates to a method for preparing fuel oil and carbon black by low-temperature catalytic thermal cracking of waste automobile tires. Background technique [0002] With the continuous increase of the number of automobiles in our country, the number of waste tires produced after the scrapping of automobiles is increasing day by day, and the accumulation of waste tires is large. If they are not disposed of in time, they will not only occupy land but also cause pollution to the environment. At present, there are several treatment methods for waste tires: (1) retreading, tire retreading meets the requirements of environmental protection and economy, but compared with natural rubber, recycled rubber is somewhat deficient, and the number of retreadings generally does not exceed two; (2) incineration , after the tire is crushed, it can be used as fuel for daily us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/10C09C1/48
CPCC09C1/482C10G1/086C10G1/10C10G2300/1003
Inventor 许开华周继锋
Owner GEM WUHAN URBAN MINE RECYCLING IND PARK DEV