Recently, the BBC and non-profit organization Source Material jointly published an investigative report. The report revealed that approximately 70% (nearly 700,000 tons) of the 50 million waste tires generated annually in the UK are exported to countries like India. These resources, which should have been properly recycled, instead became sources of environmental disasters in India, sparking global concern about waste tire disposal. This article analyzes the waste tire treatment technologies discussed in the report, clarifying the root causes of pollution and pathways to a green future.
Footage shows Indian tire processing factories engulfed in thick smoke, devastated environments, and severe health risks for workers and nearby residents. This "tire scandal" has fueled deep fears about the "tire refining" industry. However, such fears stem from confusion about waste tire treatment concepts and technologies. The appalling pollution scenes result from primitive refining—a backward process banned in China and many other countries.
Primitive refining continuously releases toxins:
Air pollution: Incomplete combustion produces massive black smoke containing sulfur dioxide, nitrogen oxides, carbon monoxide, VOCs ( benzene, toluene, PAHs ), and carcinogenic dioxins. Imperial College London experts confirm high risks of respiratory, cardiovascular, and neurological diseases for exposed workers.
Soil/water pollution: Toxic residues with heavy metals leach into soil and groundwater via rainwater, rendering land barren.
Safety hazards: Lack of pressure/temperature monitoring leads to leaks and explosions, as seen in fatal incidents reported by the BBC.
Modern pyrolysis uses precise chemical engineering under controlled industrial conditions to maximize resource recovery from waste tires.
Vary Tech, a leading pyrolysis equipment manufacturer, employs a rotary kiln-based system with subsystems for:
Automated feeding
Continuous oxygen-free pyrolysis
Non-condensable gas purification
Flue gas purification
Automated discharge
Oil-water/gas-liquid separation
Industrial-grade automation with temperature/pressure/flow monitoring.
Environmental protection is integral:
Non-condensable pyrolysis gas is desulfurized and reused to power the system, reducing external fuel needs.
Flue gas undergoes multi-stage purification (e.g., desulfurization towers, pulse dust collectors), exceeding national emission standards.
Pyrolysis achieves 100% resource utilization:
Steel wire ( 15 - 20% yield ):
Sold as high-quality scrap steel to mills.
Processed into steel grit for sandblasting in shipbuilding/machinery.
Pyrolysis oil ( 40 - 45% yield ):
Directly replaces heavy oil in industrial boilers/cement plants.
Refined into diesel for trucks/ships.
Upgraded to sustainable aviation fuel ( SAF ).
Carbon black ( 30 - 35% yield):
Reinforcing agent for rubber/plastics.
Low-sulfur solid fuel or pigment for inks/paints.
Pyrolysis gas:
Purified and reused for system heating.
Excess gas generates electricity.
Unlike primitive refining, pyrolysis receives policy backing. China’s Guidance on Comprehensive Utilization of Waste Tires and Catalog for Strategic Emerging Industries prioritize advanced pyrolysis, encouraging automation and continuous processing.
|
Aspect |
Primitive Refining (Illegal) |
Advanced Pyrolysis |
|
Core Equipment |
Open vertical furnace, brick structure, no standard |
Fully enclosed system, compliant with standards |
|
Process |
Manual, inefficient, incomplete pyrolysis |
Automated, complete pyrolysis, high efficiency |
|
Eco-Safety |
Toxic emissions, soil/water pollution, explosions |
Emissions purified, enclosed process, safe |
|
Automation |
None, high labor intensity |
High automation, minimal labor |
|
Equipment Life |
Usually no more than 2 years |
The design life is not less than 10 years |
|
Product Value |
Low-quality oil, low yield, toxic waste |
High-value oil, carbon black, steel wire |
|
Policy Status |
Banned and penalized |
State-supported, promising market |
The BBC report exposes the stark contrast between polluters and value creators in waste tire processing. The solution lies not in abandoning "refining" but adopting advanced pyrolysis. Rejecting primitive refining and investing in eco-efficient technologies like Vary Tech’s pyrolysis systems transforms "black pollution" into "black gold"—fulfilling environmental responsibilities while unlocking economic value.
