The Qingdao Dehui Xin advanced rubber tire pyrolysis equipment breaks through the bottleneck of continuous production in the thermal pyrolysis of waste tires. 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 challenge of oxygen-free pyrolysis of furnace rubber 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 100 tons of rubber powder processed daily per line).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, and achieves the purpose of "utilizing to the fullest" in a recycling manner.

Section 1: Process flow diagram of thermal cracking equipment

Two, Process Description for 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 transported 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 sensor to control the feeding, stopping the belt conveyor when the material level exceeds the set upper limit and starting it again when it falls below the set lower limit, maintaining the ideal material level. Subsequently, a vacuum feeder supplies the 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, heated and cracked. A burner supplies hot air to the cracking furnace, and the temperature inside the furnace is precisely controlled by adjusting the burner's flame size and on/off status. The granules in the reaction kettle begin to soften upon heating, then crack until they carbonize.

The entire cracking furnace system operates using a vacuum system, with the internal pressure controlled by adjusting the fan speed. The完善 sealed system provides an anaerobic cracking environment for the cracking particles, ensuring both safety and energy savings while also increasing oil yield. The system is completely leak-proof, ensuring there are no odors on-site and no environmental pollution.

3. Cracking furnace 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 cool the coarse carbon black to below 50°C. The cooled solid coarse carbon black is then sent to a magnetic separator for iron removal. The iron content in the carbon black produced by cracking is approximately 2%. It is necessary to remove it completely 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 combustion boiler, equipped with a thermoelectric sensor on the furnace body that provides real-time temperature readings to the control panel. The combustion boiler's fuel is the gaseous byproduct of pyrolysis, and natural gas is used as the energy source during the initial use.

The furnace body returns heat-induced electrical feedback to the control panel, allowing for real-time adjustment of the burner's flame size and on/off, to accurately control the furnace temperature. Accurate temperature control within the cracking furnace can enhance oil yield and improve the quality of the produced oil.

Hot air from the heating or jacket is supplied to the drying system of the granulating equipment, and is exhausted 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 and gas separator. Through the collision action, heavy oil and sludge settle 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 for effective condensation and is less prone to clogging, allowing for long-term operation. The condensed finished oil is transferred to an interim storage tank, with the combustible gas extracted from the top of the tank and fed into a gas holder for use by the burner. The interim storage tank is equipped with a level sensor; when the oil reaches a set position, the pump activates to pump the oil into the storage tank.