Product Line

Providing energy-efficient, environmentally friendly equipment and integrated solutions.

Film coating

Film coating

Film coating

Film coating

Film coating

Film coating

Incinerator

Incinerator

Incinerator

Incinerator

Incinerator

Incinerator

Three-bed RTO

Product Introduction: The three-bed regenerative thermal oxidizer (RTO) is a medium- to low-concentration organic waste gas treatment system that features the lowest operating energy consumption and exceptionally high removal efficiency. Compared with conventional catalytic combustion units, direct-fired thermal oxidizers (TO), and two-bed thermal oxidizers, the RTO boasts high thermal efficiency (≥95%), low operating costs, and the ability to handle large air volumes of low-concentration waste gases. When the concentration is slightly higher, secondary waste heat recovery can be implemented, further reducing production and operational expenses. Process Principle: The low-temperature organic waste gas to be treated is drawn by the inlet fan into the ceramic media bed of Regeneration Chamber A, where the ceramic media has already “stored” the heat from the previous cycle. As the ceramic releases heat, its temperature drops, while the organic waste gas is heated to a higher temperature before entering the combustion chamber. In the combustion chamber, the burner combusts fuel and releases heat, raising the gas temperature to the set oxidation temperature of 760°C, at which point the organic compounds in the waste gas are decomposed into CO2 and H2O. Because the waste gas has been preheated by the regenerative chamber, the oxidation process itself also releases some heat, thereby reducing the amount of fuel required by the burner. The oxidation chamber serves two functions: first, to ensure that the waste gas reaches the set oxidation temperature; and second, to provide sufficient residence time for complete oxidation. After the waste gas is purified and becomes high-temperature clean gas, it exits the combustion chamber and enters Regeneration Chamber C (where the ceramic media from the previous two cycles have already been cooled and purged), releasing heat and lowering its temperature before being discharged. Meanwhile, the ceramic in Regeneration Chamber C absorbs heat and stores a large amount of thermal energy for use in heating during the next cycle. During this cycle, Regeneration Chamber B performs the purging function. Once the cycle is complete, the inlet and outlet valves of the regenerative chambers are switched: Regeneration Chamber C takes in the incoming gas, Regeneration Chamber B exhausts the treated gas, and Regeneration Chamber A is purged. In the subsequent cycle, Regeneration Chamber B takes in the gas, Regeneration Chamber A exhausts the treated gas, and Regeneration Chamber C is purged, and this alternating sequence continues indefinitely. When the RTO is not yet ready to operate or is shut down, the waste gas can temporarily bypass the RTO and be discharged directly through the stack. To enhance environmental protection and energy efficiency, a heat exchanger can be installed at the RTO’s tail end for waste heat recovery. Process Flow Diagram Performance Characteristics: ● Can treat virtually all waste gases containing organic compounds. ● Capable of handling large air volumes and organic waste gases across a wide range of concentrations. ● Offers great flexibility in processing organic waste gas flow rates (nominal flow rate ranging from 20% to 120%). ● Adapts well to variations and fluctuations in the composition and concentration of VOCs in the waste gas. ● Insensitive to small amounts of dust and solid particles entrained in the waste gas. ● Achieves the highest thermal efficiency among all thermal combustion-based purification methods (>95%). ● Under appropriate waste gas concentration conditions, can operate on self-generated heat without the need for auxiliary fuel. ● High purification efficiency (three-chamber system >99%). ● Requires minimal maintenance and offers safe, reliable operation. ● Organic deposits can be periodically removed, and the heat storage media can be replaced. ● The entire system exhibits low pressure drop. ● Long service life. Application Fields: Widely used in painting and coating processes for automobiles, vehicles, shipbuilding, and industrial products; in the petroleum, chemical, ink, and dye industries; in the rubber and plastics, leather, adhesive tape, electrical insulation, enameled wire, electronics, and printed circuit board industries; in printing, packaging, metal sheet coil coating lines, laminating lines, tinplate can manufacturing, and textile dyeing industries; in the building materials, decoration, and furniture painting and coating sectors; as well as in the pharmaceutical, food, and additive industries. Applicable Waste Gases: ● Types of organic waste gases: alkanes, alkenes, alcohols, ketones, ethers, esters, aromatics, benzenes, and other hydrocarbon-based organic waste gases. ● Low concentrations of organic compounds (simultaneously meeting the requirement of being below 25% of the lower flammable limit) and large air volumes. ● Waste gases containing multiple organic components, or those whose organic composition frequently changes. ● Waste gases containing substances that can easily poison catalysts or reduce their activity. ● Not suitable for waste gases with high silicon resin content.

Three-bed RTO

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

Regenerative Thermal Oxidizer (RTO)

Rotary Concentration + RTO

Product Introduction: For low-concentration, high-volume VOC exhaust gases, the heat generated by the oxidative decomposition of VOCs is insufficient to sustain the RTO’s self-circulating operation, necessitating the consumption of additional fuel. The concentrated rotor–RTO incineration system utilizes a rotary wheel packed with zeolite as the adsorbent material to first adsorb the exhaust gas, then desorb it, and finally feed the desorbed, concentrated exhaust into the RTO for incineration. This approach significantly reduces the energy consumption associated with the combustion process during exhaust gas treatment. The process principle involves dividing a circular rotor filled with zeolite adsorbent material into three zones: the adsorption zone, the desorption zone, and the cooling zone. First, the low-temperature, low-concentration, high-volume exhaust gas is allowed to

Rotary Concentration + RTO

Exhaust Gas Incinerator (Continuous RTO)

Product Introduction: This continuous regenerative thermal oxidizer (RTO) is designed to treat, through high-temperature, harmless incineration, orderly-discharged, high-concentration, toxic, hazardous, and malodorous organic exhaust gases generated during industrial production processes. Thanks to the company’s patented continuous heat exchange (regenerative) technology, this RTO offers superior stability compared with conventional RTOs during continuous production operations, while also reducing energy consumption in the original production process. The process principle involves a regenerative high-temperature exhaust gas incinerator that treats exhaust gases produced during coating baking operations—gases that contain a certain concentration and temperature—and directs them into a multi-stage heat exchanger for preheating (regenerative heat storage).

Exhaust Gas Incinerator (Continuous RTO)

Steel Drum Drying Production Line

Steel Drum Drying Production Line

WJF-Type Mechanical Iron-Flipping Machine

This machine is primarily used for flipping metal sheets after printing, coating, varnishing, and stacking, making it an indispensable auxiliary equipment in the process flow of the metal packaging industry.

WJF-Type Mechanical Iron-Flipping Machine

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Contact Us

Phone

+86-519-88522586
+86-519-88522589
+86-519-88522585(Abroad)

Email

info@dingma.com

Address

No. 4, Innovation Road, Luoyang Industrial Park, Wujin District, Changzhou City

Copyright © Changzhou Dinglong Environmental Protection Equipment Co., Ltd.

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