Regenerative Thermal Oxidizer (RTO)
Product Introduction: The regenerative thermal oxidizer (RTO) with a rotary heat storage design is suitable for treatment systems ranging from 5,000 to 100,000 Nm³/h. This compact RTO configuration not only saves space compared with conventional tower-type RTOs but also enhances heat recovery efficiency through the use of a unique rotary valve, thereby reducing exhaust gas carryover caused by valve switching and delivering superior energy-saving and emission-reduction performance. With an exhaust gas purification efficiency of up to 99%, the rotary RTO system represents the most advanced and cost-effective exhaust gas treatment solution available today. Process Principle: ① Organic exhaust gases are heated to above 760°C and held at this temperature for more than 1 second, enabling the complete oxidation and decomposition of VOCs into carbon dioxide and water. ② The high-temperature flue gas produced during oxidation passes through specially designed ceramic heat-storage units, raising their temperature and “storing” heat. This stored heat is then used to preheat the incoming organic exhaust gases, significantly reducing fuel consumption for heating and lowering operating costs. ③ The ceramic heat-storage units are divided into three zones, with each zone sequentially undergoing heat storage, heat release, and cleaning cycles in a continuous, cyclical process. Immediately after the heat-release phase, a controlled amount of clean air is introduced to purge the unit, ensuring that the VOC removal rate remains above 99%. Only after the purging is complete does the unit resume the heat-storage cycle. ④ During cold-start heating, the furnace temperature is raised using the burner system; under normal operating conditions, most of the heat is recovered by the ceramic heat-storage beds. When the concentration of combustible components in the exhaust gas is too low, auxiliary fuel (natural gas) is used to maintain the required furnace temperature. Conversely, when the furnace temperature becomes excessively high, a high-temperature vent valve—controlled by the furnace temperature—releases excess heat. Process Flow Diagram Performance Features: ● Stable heat exchange, excellent gas tightness, high heat recovery efficiency, and reduced operating costs. ● Small footprint, unrestricted by installation site constraints. ● Modular design, short installation time. ● Fully automated operation, with comprehensive monitoring of inlet and outlet points, the combustion chamber, and the heat-storage sections to ensure safe and stable equipment operation. ● Fewer equipment failures and lower maintenance costs. Rotary RTO vs. Conventional Tower RTO: | Feature | Rotary RTO | Conventional Tower RTO | | --- | --- | --- | | Valve Design | No leakage; continuous rotation ensures smooth gas flow and low noise | Leaky valves prone to cross-contamination | | Heat Storage Mechanism | Continuous heat storage and release with minimal interruptions; no pulsating airflow | Intermittent heat storage and release, leading to shorter service life | | Ceramic Heat Storage Units | Durable rubber seals and gear-driven mechanisms; resistant to corrosion and wear | Corrosion-prone seals and frequent wear; potential for cracking | | Heat Recovery Efficiency | High heat recovery efficiency due to continuous heat storage and release | Lower heat recovery efficiency due to intermittent heat storage and release | | Service Life | Longer service life thanks to continuous heat storage and release | Shorter service life due to frequent heat release | | Structural Design | Compact, space-saving design; lightweight and only one-third the footprint of conventional systems | Larger footprint and heavier weight due to less efficient material utilization | | Maintenance Requirements | Minimal maintenance needed | Higher maintenance requirements due to complex multi-valve control systems | Application Scope: ① Widely applicable to painting and coating processes in the automotive, vehicle manufacturing, shipbuilding, and industrial products sectors; as well as in the petroleum, chemical, ink, and dye industries; rubber and plastics, leather, adhesive tape, cable, enameled wire, electronics, and printed circuit board industries; printing, packaging, metal sheet coil coating lines, laminating lines, tinplate can production, and textile dyeing industries; building materials, decoration, and furniture coating and spraying industries; and the pharmaceutical, food, and additive industries. ② Airflow rate: 5,000–10,000 Nm³/h ③ Concentration: ≥1,000 mg/m³
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Keywords: Regenerative Thermal Oxidizer (RTO)
Regenerative Thermal Oxidizer (RTO)
Product Introduction
Regenerative Thermal Oxidizers (RTOs) with a rotary heat storage design are suitable for treatment systems ranging from 5,000 to 100,000 Nm³/h. This configuration features a more compact footprint than conventional tower-type RTOs, while the unique rotary valve design enhances heat storage efficiency, minimizes exhaust gas carryover caused by valve switching, and delivers superior energy-saving and emission-reduction performance. With an exhaust gas purification efficiency of up to 99%, the rotary RTO system represents one of the most advanced and cost-effective exhaust gas treatment solutions available today.
Process Principle
① involves heating organic waste gas to above 760°C and maintaining a residence time of more than 1 second, thereby oxidizing and decomposing the VOCs in the gas into carbon dioxide and water.
② The high-temperature flue gas generated by oxidation flows through a specially designed ceramic heat-storage unit, raising the temperature of the ceramic and “storing heat.” This stored heat is then used to preheat the subsequent organic waste gas entering the furnace, thereby reducing fuel consumption for heating the waste gas and lowering operating costs.
③ The ceramic heat storage units shall be divided into three zones, with each heat storage chamber sequentially undergoing the cycles of heat storage, heat release, and cleaning, repeating continuously. Immediately after a chamber completes the “heat release” phase, an appropriate amount of clean air shall be introduced to purge that chamber (to ensure a VOC removal efficiency of at least 99%), and only after the purging is completed may the chamber proceed to the “heat storage” phase.
④ During cold-start preheating, the burner system is used to raise the furnace temperature; under normal operating conditions, most of the heat is recovered by the heat-storage ceramic beds. When the concentration of combustible components in the exhaust gas is too low, auxiliary fuel (natural gas) is burned to increase the furnace temperature. Conversely, when the furnace temperature becomes excessively high, a high-temperature vent valve controlled by the furnace temperature is opened to release a portion of the heat.
Process Flow Diagram
Performance Features
● Stable heat exchange, excellent air tightness, high heat recovery efficiency, and reduced operating costs.
● Small footprint, with no restrictions on installation space.
● Modular design for a short installation period.
● Automated operation: By monitoring multiple system components—including the inlet and outlet sections, the combustion chamber, and the heat-storage units—system safety and stable operation are ensured.
● Fewer equipment failures and lower subsequent maintenance costs.
| Regenerative Thermal Oxidizer (RTO) | Traditional Tower-Type RTO |
| Leak-free | Valves are prone to leakage and gas crossover. |
| The rotary valve rotates continuously, ensuring smooth airflow and low noise. | The lift valve exhibits significant vibration, and the airflow is pulsating intermittently. |
| Single-valve control is simple, and the system operates stably. | Multiple valves operate in coordination, resulting in numerous control points and a higher likelihood of malfunctions. |
| Contactless airtight design and gear transmission for durability. | Rubber ring sealing is prone to corrosion and wear, and can crack upon impact. |
| Intermittent heat storage and release by the thermal storage medium extends its service life. | Frequent heat release and heat storage by the thermal storage medium shorten its service life. |
| High-strength corrugated panel housing design, accommodating thermal expansion and contraction. | Shell stiffening ribs cannot relieve thermal expansion stresses. |
| Compact design, occupying one-third less space and weighing one-third less. | Low material utilization, large footprint, and bulky. |
Scope of Application
①Can be widely used for spraying and coating applications in the automotive, vehicle, shipbuilding, and industrial product sectors;
Petroleum, chemical, ink, and dye industries;
Rubber and plastic, leather, adhesive tape, cables, enameled wire, electronics, and printed circuit board industries;
Printing, packaging, metal coil coating lines, laminating lines, tinplate printing and canning, and the printing and dyeing industries;
Coating and spraying industries for building materials, interior decoration, and furniture;
Pharmaceutical, food, and additive industries.
② Airflow: 5,000–10,000 Nm 3 /h
① Concentration ≥ 1000 mg/m 3
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