pyrolysis technology

Process principle of pyrolysis of waste tires

Date:2021-12-23 Author: Click:

Pyrolysis, or pyrolysis, thermal cracking, thermal cracking, or high-temperature cracking, refers to the high-temperature pyrolysis reaction of organic substances in the absence of oxygen, which can convert one sample (mainly polymer compounds) into several other substances ( Mainly refers to the chemical process of low-molecular substances). Waste tire cracking is the method, and waste tire oil refining is the purpose. The waste tires are processed through the waste tire cracking reaction to achieve the purpose of waste tire oil refining.

Waste tires are used to prepare fuel oil using rotary kiln pyrolysis technology. The pyrolysis technology of waste tires rotary kiln is more extensive than other processes. The advantage of rotary kiln pyrolysis furnace is that it has low requirements for the particle size of waste tires and the properties of pyrolytic charcoal. It is very uniform and does not require high negative pressure. Instead, it adopts the micro-negative pressure condition caused by the fan. The production is safe, the equipment investment is small, and the profit is fast. It is currently a widely used production process.

The basic process of pyrolysis and refining of Hubei kebos waste tires:

Put the waste tire into the cracking axe, heat it up, dehydrate, and then heat up. The tire is melted and then vaporized, condensed by a condenser, separated by a separator, and filtered to obtain liquid tire oil.


Detailed introduction of Hubei kebos Waste Tire Pyrolysis Refining:

1. Feeding

Feeding is to put waste tires into the cracking axe. This process can be manually fed, fed by a flat conveyor, and fed by a hydraulic feeder. The Z new process factory usually uses a hydraulic feeder for its production efficiency. It is high, save manpower, does not need to cool the cracking kettle to shorten the production cycle, and is widely used by many factories for its advantages such as safety.

2. Pyrolysis and gasification

The waste tires are put into the cracking axe, and then the temperature of the cracking axe is heated up, so that the temperature in the cracking axe gradually rises to 100°C. During this process, the water and small molecules in the waste wheel will volatilize, and then precipitate and settle into the separator for release. As the moisture and small molecular substances gradually evaporate, the temperature in the cracking axe will continue to rise. When it reaches 140°C, the waste tires will begin to melt into a liquid state. Turn on and rotate, causing the converter to rotate, and the temperature will continue to rise. Gradually vaporize as the temperature rises. When the temperature in the cracking axe rises to 260℃-280℃, then maintain it for 6-12h (depending on the vaporization situation). At this time, the pressure is 1.2kg/㎡ until Completely vaporized, the vaporized gas will be condensed in the condenser.

3. Combustion oil condensation

The gas vaporized by the cracking axe passes through a centrifugal separator to remove dust and other impurities, and then enters the coarse-mouth, straight-through condenser for cooling. The liquid oil obtained by the condenser cooling enters the crude oil storage tank, and then is pumped into the oil pump for vibration filtration. Filter in the machine to further remove impurities to obtain refined oil.

4. Combustible gas recovery

The uncondensed gas in the condenser, here called "non-condensable gas", is further cooled and fully recovered by the condenser tail gas cooling system, then enters the gas-liquid separator, and then enters the cracking axe through the tail gas burner to be burned again.

5. Cracking waste gas filtration

The exhaust gas generated during the heating process of the cracking axe is pumped by the fan to the water circulation type dust removal system, enters the gas purification box, is adsorbed by harmful substances such as sulfur and other substances, and the relatively clean exhaust gas after Z is discharged into the air.

6. Collection of by-products such as pyrolysis carbon black and steel wire

The carbon ash generated after combustion in the cracking axe is sealed and transported out dust-free by a screw conveyor and packed. The steel wires remaining after the waste tires are melted and burned are drawn out and sorted.






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