The Qingdao Dehui Xin Waste Tyre Pyrolysis equipment boasts an advanced process flow and technological equipment, breaking through the bottleneck of continuous production in waste tyre pyrolysis. It innovatively employs intelligent control technology, high-temperature hot air temperature control technology, granule feeding sealing technology, and carbon black discharge sealing technology, solving the global难题 of oxygen-free pyrolysis of furnace powder and oil-gas cooling congestion.

This technology boasts independent intellectual property rights, with its process flow and complete technical equipment featuring intelligent operation convenience and strong production processing capabilities (approximately processing about 100 tons of rubber powder per line daily).50 tons), low operating costs for equipment, outstanding comprehensive economic benefits, and superior cost-performance ratio of complete sets of equipment. Achieves "zero pollution" and full industrial chain utilization of waste tires, and meets the goal of "utilizing to the fullest" in the recycling process.

One, Petrothermal cracking equipment process flow diagram

Two, Process Description of Pyrolysis Equipment

Cracking process includes cracking furnace inlet, cracking furnace system, cracking furnace outlet, heating system, and oil-gas condensation system.5 processes.

1. Cracker inlet process

Granules are conveyed to the hoist position by a belt conveyor, where they are then lifted into the receiving bin. The receiving bin is equipped with a level sensor that controls the conveyance, stopping the belt conveyor when the material level exceeds the set upper limit. When the level falls below the set lower limit, the belt conveyor is activated to supply more granules, maintaining the ideal material level. Subsequently, a vacuum feeder provides airless granules to the cracking furnace.

2. Cracking Furnace System

The cracking furnace system consists of three levels: upper, middle, and lower cracking. The particles are evenly fed into the cracking furnace for heating and cracking through the entry process of the cracking furnace. A burner supplies hot air to the cracking furnace, and the temperature inside the furnace is precisely controlled by adjusting the size of the flame and turning the burner on or off. The particles in the reaction kettle begin to soften under heat, cracking until they carbonize.

The cracking furnace system operates using a vacuum system, controlling the internal pressure by adjusting the fan speed. The complete sealed system provides an anaerobic cracking environment for the granules, ensuring both safety and energy savings, as well as an increased oil yield. The entire system is leak-free, truly achieving a site without odors and an environment free of pollution.

3. Cracking furnace outlet process

The raw carbon black produced by pyrolysis, with a temperature exceeding 400°C, is transported to the carbon black packaging workshop via a screw conveyor. The conveyor is equipped with a water-cooling system to cool the raw carbon black to below 50°C. The cooled, solid raw carbon black is then lifted by a screw elevator and sent to a magnetic separator for iron removal. The iron content in the pyrolysis-produced carbon black is approximately 2%, which must be completely removed before entering the carbon black powdering and packaging process to ensure the purity and quality of the carbon black product.

4. Heating System

The system is heated by a burner, equipped with a thermoelectric sensor on the furnace body that provides real-time temperature readings to the control panel. The burner's fuel is the gaseous byproduct of pyrolysis, with natural gas serving as the energy source for the initial use.

The furnace body returns heat-inductive feedback to the control panel, allowing for real-time adjustments of the combustion engine's high and low flame, as well as start and stop, to accurately control the furnace temperature. Accurate temperature control within the cracking furnace can enhance oil yield and improve oil quality.

Hot air from heating or jacket is supplied to the dryer system of the granulating equipment, and released after desulfurization and denitrification.

5. Oil and Gas Condensate System

Crude oil and gas enter the condensation system from the cracking furnace, first passing through a collision oil-gas separator. Through the collision effect, heavy oil residue condenses at the bottom of the tank, enhancing the quality of the finished product. The gas post-separator then enters a tubular shell condenser, which has a large contact area, excellent condensation efficiency, and is less prone to clogging, allowing for long-term operation. The condensed finished oil is transferred to an interim storage tank, where the combustible gas is extracted from the top and fed into the gas holder for use in burners. The interim storage tank is equipped with an oil level indicator; when it reaches the set position, the oil pump is activated to pump the oil into the storage tank.