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

This technology boasts independent intellectual property rights, with the process flow and complete technical equipment featuring intelligent operation convenience and strong production and processing capabilities (approximately processing about 100 tons of rubber powder per line daily).50High tonnage output, low operation cost of equipment, outstanding comprehensive economic benefits, and superior cost-performance ratio of complete sets of equipment. Achieves comprehensive utilization of waste tires.“Zero pollution, full industrial chain utilization”Achieved“Leave nothing to chance”Purpose of recycling.

One, Process flow diagram for pyrolysis equipment

Two, 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.5A process.

1Cracking 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 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 material level. Subsequently, a vacuum feeder supplies airless granules to the cracking furnace.

2Cracking 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 entry process, where they are heated and cracked. A burner provides hot air to the cracking furnace, and the temperature inside is precisely controlled by adjusting the burner's flame size and on/off operation. The granules in 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 sealed system provides an anaerobic cracking environment for the particles, ensuring both safety and energy efficiency while increasing oil yield. The entire system is leak-proof, ensuring no odors on-site and a pollution-free environment.

3Cracking Furnace Export Process

   Raw carbon black obtained from thermal cracking has a temperature exceeding400℃The coarse carbon black is transported to the carbon black packaging workshop via a spiral conveyor, which is equipped with a water-cooling unit to cool the temperature of the carbon black.50℃Below, the cooled solid coarse carbon black is conveyed into a magnetic separator by a screw conveyor for iron removal. The iron content in the coarse carbon black produced by pyrolysis is approximately:2%Prior to the carbon black powder packaging process, it is essential to thoroughly clean to ensure the purity and quality of the carbon black product.

4Heating System

  The system is heated by a burner, and a thermocouple is installed on the furnace body to feedback temperature readings in real-time to the control panel. The fuel for the burner is the gaseous byproduct of pyrolysis, with natural gas providing the energy during the initial use.

   The furnace body returns heat-inductive feedback to the control panel, allowing for real-time adjustments of the burner's flame size and 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 exhausted after desulfurization and denitrification.

5Oil 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 and residue settle at the bottom of the tank, improving the finished product's quality. The gas post-separator 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 then transferred to an intermediate storage tank. The recoverable gas is drawn from the top of the intermediate storage tank into a gas holder, and then supplied to the burner. The intermediate storage tank is equipped with an oil level sensor; when it reaches the set position, the oil pump activates to pump oil into the storage tank.