SBS Industry Treatment Solutions

RP Techniek BV Rotary RTO has been extensively adopted for waste gas treatment in the production of SBS asphalt waterproof coiled materials and related products. Its robust design ensures efficient destruction of volatile organic compounds (VOCs) and odorous emissions generated during asphalt processing. With high thermal efficiency and stable operation under variable load conditions, this system not only meets stringent environmental regulations but also reduces operational costs through energy recovery.

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regenerative thermal oxidiser-application-Waterproof membrane industry

Characteristics of waste gas: large air volume, complex composition, oil and particulate matter
Source of waste gas: waste gas from batching reactor, waste gas from asphalt storage tank area, waste gas from asphalt forming line oil coating tank and water bed
Waste gas components: more than 80 kinds of polycyclic aromatic hydrocarbons such as benzopyrene, benzoanthracene, carbazole, etc
Process scheme: waste gas capture + pipeline transportation + pipeline fire protection system + cyclone oil removal + tower filtration + heat tracing + rotary RTO
Waste gas concentration: 200mg/m³～400mg/m³
Emission limit: NMHC≤10mg/m³

Waterproofing membranes 3D drawing

Process flow chart of Waterproofing membranes

Exhaust Gas Pretreatment

Asphalt flue gas undergoes 4-stage filtration and oil removal before entering RTO, with an oil and gas separation efficiency of up to 90%.

Exhaust Gas Collection

Fire damper, Proportional valve and Manual regulating valve for gas hood are critical for ensuring safety, precision control, and operational flexibility in industrial ventilation and exhaust gas management systems. The fire damper automatically closes in response to high temperatures, preventing the spread of fire through ductwork. The proportional valve enables precise adjustment of gas or air flow rates, supporting efficient combustion and process control. The manual regulation valve on the capture hood allows operators to finely tune the exhaust air volume based on real-time production needs, ensuring optimal capture efficiency and energy usage. Together, they enhance system safety, performance, and adaptability.

Exhaust Gas Collection and Low-point Oil Drainage

The inclination angle of the pipeline is convenient for collecting the liquid in the pipeline; a drain port is set at the low point.

rto-SBS Industry-exhaust gas collection and low-point oil discharge-1

Exhaust Duct Maintenance Platform and Duct Access Cleaning Openings

RTO Oil Drainage Structure Design

rto-SBS Industry-RTO oil discharge structure design-1

Furnace Base Oil Drainage Design

rto-SBS Industry-furnace bottom oil drainage design-1

The rotary valve RTO furnace base is elevated 2 meters above the ground, with an internal oil drainage structure. Compared to chamber bed RTOs, this design significantly enhances oil drainage efficiency, preventing oil accumulation inside the furnace and eliminating the fire hazard caused by oil retention and rebaking at the base of chamber-type RTOs.