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 challenge 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 day on a single line).50 tons), low operation costs, 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 achieves the purpose of "utilizing to the fullest" in recycling.

One, Process Flow Diagram for Pyrolysis Equipment

Section II Process Description of Pyrolysis Equipment

Cracking process of polymer particles 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 elevator position by a belt conveyor, where they are then fed into the receiving bin by the elevator. 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 feeding the granules is stopped. When the material level falls below the set lower limit, the belt conveyor feeding the granules is activated. This ensures the material level remains at an ideal position. Subsequently, a vacuum feeder supplies airless granules to the cracking furnace.

2. Cracking Furnace System

The cracking furnace system consists of three levels: upper, middle, and lower. The granules are evenly fed into the cracking furnace through the inlet process for heating and cracking. 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 starting or stopping the burner. The granules in the reaction kettle begin to soften upon heating and undergo cracking until they 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 anaerobic cracking environment for the particles, ensuring both safety and energy savings while enhancing oil yield. The entire system is leak-free, ensuring no odors on-site and no environmental pollution.

3. Cracking furnace export process

The coarse carbon black produced by pyrolysis, with temperatures 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 lower the temperature of the coarse carbon black to below 50°C. The cooled, solid coarse carbon black is then lifted by a screw elevator and sent to a magnetic separator for iron removal. The iron content in the pyrolytic carbon black is approximately 2%, and it must be completely purged 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, which is equipped with a thermoelectric sensor on the furnace body, providing real-time temperature readings to the central control console. The burner's fuel is the gaseous product of pyrolysis, with natural gas as the energy source for the initial use.

The furnace body feeds back thermoelectric signals to the central control panel, allowing for real-time adjustment of the combustion machine's flame size and on/off, to accurately control the furnace temperature. Accurate temperature control in the cracking furnace can subsequently increase oil yield and improve oil quality.

Hot air from the heating or jacket is supplied to the drying system of the granulation equipment, and then 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 the collision oil-gas separator. Through the collision action, heavy oil sludge condenses at the bottom of the tank, thereby enhancing the quality of the finished product. The gas after separation enters the tubular shell condenser, which has a large contact area, excellent condensation performance, and is less prone to clogging, allowing for long-term operation. The condensed finished oil is then transferred to an intermediate storage tank. The gaseous fuel is extracted from the top of the intermediate storage tank and fed into the gas holder, where it is then supplied to the burner. The intermediate storage tank is equipped with an oil level sensor. When the oil level reaches a set position, the oil pump activates to pump the oil to the storage tank.