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Method for preparing pyrolytic tar and limonene by pressurizing and pyrolyzing waste tires

A waste tire and pyrolysis oil technology, which is applied in the preparation of liquid hydrocarbon mixtures, petroleum industry, organic chemistry, etc., can solve the problem that the yield of waste tire pyrolysis oil cannot reach a more ideal value, so as to improve the total yield, The effect of increasing the mass ratio and increasing the concentration

Active Publication Date: 2020-03-31
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, the pyrolysis oil yield of waste tires may not reach the ideal value at medium and low temperatures
[0007] As for the effect of pyrolysis pressure on the yield of limonene, there are only preliminary studies

Method used

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  • Method for preparing pyrolytic tar and limonene by pressurizing and pyrolyzing waste tires
  • Method for preparing pyrolytic tar and limonene by pressurizing and pyrolyzing waste tires
  • Method for preparing pyrolytic tar and limonene by pressurizing and pyrolyzing waste tires

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] The invention provides a method for preparing pyrolysis oil and limonene by pressurized pyrolysis of waste tires. figure 1 The pyrolysis system shown includes: a nitrogen cylinder 1, an inlet gas mass flow meter 2, a pyrolysis reactor 3, a temperature controller 4, a first back pressure valve 5, a condensation device 6, a second back pressure valve 7, Gas mass flow meter 8 at the outlet end.

[0028] in:

[0029] The first back pressure valve 5 and the second back pressure valve 7 control the pressure in the system, the temperature controller 4 controls the pyrolysis temperature in combination with the heater of the pyrolysis reactor, the gas mass flow meter 2 at the inlet end, and the gas mass flow meter at the outlet end The flow meter 8 monitors and controls the flow of the shielding gas.

[0030] The pyrolysis reactor 3 ...

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Abstract

The invention discloses a method for preparing pyrolytic tar by pressurizing and pyrolyzing waste tires. The method comprises the following steps: putting crushed waste tires into a pyrolysis reactor,continuously introducing a protective gas at a preset flow rate, controlling the reaction pressure at 0.5-2.0 Mpa, heating to fully pyrolyze the waste tires, and collecting a pyrolysis product to obtain limonene-containing pyrolytic tar. The invention also provides a preparation method of limonene, which comprises the following steps: preparing the limonene-containing pyrolytic tar by using the above method, and separating and purifying to obtain limonene. According to the method disclosed by the invention, the pyrolytic reaction of the waste tires is controlled to be carried out in a properpressure interval, so that the mass ratio of limonene in the pyrolytic tar is effectively increased, and the concentration of limonene in the pyrolytic tar product is remarkably increased compared with normal-pressure and vacuum pyrolysis at the same temperature.

Description

technical field [0001] The invention relates to the utilization technology of waste tires, in particular to a method for preparing pyrolysis oil and limonene by pressurized pyrolysis of waste tires. Background technique [0002] Since the last century, the output of motor vehicles and the number of households have increased sharply in society, and the production rate of waste tires has also increased sharply. The use of pyrolysis technology to treat waste tires has the advantages of high product calorific value and high recovery rate, and can realize the recycling, harmlessness and reduction of waste treatment. [0003] Tire pyrolysis oil is one of the main products of pyrolysis, and its yield can reach more than 45% at an appropriate temperature. Comparing the pyrolysis products of tires at different temperatures, the oil yield generally reaches its peak around 500°C, and the specific value varies according to the pyrolysis reactor, heating rate, and final temperature resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/07C10G1/10C07C7/04C07C13/21
CPCC07C7/04C10B53/07C10G1/10C07C13/21Y02P20/143
Inventor 胡松马思杰李艾书梁惠妮韩亨达徐俊江龙汪一苏胜向军
Owner HUAZHONG UNIV OF SCI & TECH
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