The Qingdao Dehui Xin waste tire pyrolysis equipment features an advanced process flow and technological equipment, breaking through the bottleneck of continuous production in waste tire 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 challenges 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 ease and strong production and processing capabilities (approximately 100 kg of rubber powder processed per line daily).50 tons), low operation costs, outstanding comprehensive economic benefits, and superior cost-performance ratio of complete sets of equipment. Achieves comprehensive utilization of waste tires with "zero pollution" and full industrial chain utilization, achieving the purpose of "making full use of everything."

One, Process Flow Diagram for Pyrolysis Equipment

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.

Cracking Furnace Inlet Process

Granules are conveyed to the hoist position by a belt conveyor, where the hoist feeds them into the receiving bin. The receiving bin is equipped with a level control transmitter for both upper and lower limits. When the material level exceeds the set upper limit, the belt conveyor stops supplying granules. When the material level falls below the set lower limit, the belt conveyor starts supplying granules again, maintaining the ideal 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 sections. The granules are evenly fed into the cracking furnace through the inlet process, where they are heated and cracked. A burner supplies hot air to the cracking furnace, and the temperature inside is precisely controlled by adjusting the burner's flame size and on/off status. The granules inside the reactor start to soften upon heating, then crack and eventually carbonize.

The cracking furnace system operates using a vacuum system, with the furnace pressure controlled by adjusting the fan speed. The complete enclosed system provides an oxygen-free cracking environment for the particles, ensuring both safety and energy efficiency while enhancing the oil yield. The entire system is leak-free, ensuring no odor on-site and zero environmental pollution.

3. Cracker outlet process

The coarse carbon black produced by thermal cracking has a temperature exceeding 400°C. It is transported to the carbon black packaging workshop via a spiral conveyor, which is equipped with a water-cooling system to lower the temperature of the coarse carbon black to below 50°C. The cooled solid coarse carbon black is then lifted by a spiral hoist and sent to a magnetic separator for iron removal. The iron content in the coarse carbon black from cracking is approximately 2%, and it must be completely purified 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 induction feedback to the control panel, allowing for real-time adjustment of the combustion machine's high and low fire as well as start/stop, to accurately control the furnace temperature. Accurate temperature control within the cracking furnace can improve oil yield and enhance the quality of the produced oil.

Hot air from the heating or jacket is supplied to the dryer system of the granulation equipment, and is vented 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 separator tank. Through the collision effect, heavy oil and residues condense at the bottom of the tank, enhancing the finished product's quality. The gas post-separator then flows into a tubular shell condenser, which boasts 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 intermediate storage tank, with the combustible gas extracted from the top of the tank and fed into the gas holder for use in burners. An oil level sensor is installed in the intermediate storage tank; when it reaches the set position, the oil pump activates to pump the oil into the storage tank.