The Regenerative Thermal Oxidizer (RTO) is an environmentally friendly equipment used for treating medium to high concentration organic waste gases. The RTO thermal storage incineration equipment oxidizes organic compounds (VOCs) in the exhaust gas into corresponding carbon dioxide and water at high temperatures, thereby achieving the purpose of purifying the exhaust gas and recovering the heat released during the decomposition of the exhaust gas.
The Regenerative Thermal Oxidizer (RTO) is an environmentally friendly equipment used for treating medium to high concentration organic waste gases. The RTO thermal storage incineration equipment oxidizes organic compounds (VOCs) in the exhaust gas into corresponding carbon dioxide and water at high temperatures, thereby achieving the purpose of purifying the exhaust gas and recovering the heat released during the decomposition of the exhaust gas. The three chamber RTO exhaust gas decomposition efficiency reaches over 99%, and the heat recovery efficiency reaches over 95%, which can reduce operating costs. The main structure of RTO thermal storage incineration equipment consists of a combustion chamber, a thermal storage chamber, a burner, a switching valve, a gas and combustion support system, a compressed air system, a control system, etc. Different heat recovery methods and switching valve methods can be selected according to the actual needs of customers.
The principle of RTO regenerative incineration technology is to heat organic waste gas to above 760 ℃, so that VOCs in the waste gas are oxidized and decomposed into carbon dioxide and water. The high-temperature gas generated by oxidation flows through a specially designed ceramic heat storage body, causing the ceramic body to heat up and "store heat", which is used to preheat the organic waste gas that enters later. Thus saving fuel consumption for exhaust gas heating. Ceramic thermal storage bodies should be divided into two or more zones or chambers, with each chamber undergoing a sequence of thermal storage, heat release, and cleaning, repeating the process and working continuously. After the "heat release" of the heat storage chamber, an appropriate amount of clean air should be immediately introduced to clean the chamber (to ensure a VOCs removal rate of over 95%). Only after the cleaning is completed can the "heat storage" program be entered.
RTO equipment components
Regenerator, oxidation combustion chamber, switching valve, burner, gas and combustion support system, compressed air system, control system, etc.
RTO heat storage chamber
The RTO furnace body consists of two or more heat storage chambers and a combustion chamber. The heat storage chamber performs functions such as preheating, blowing, and heat storage, taking turns to do so. The shell is made of 6mm carbon steel plate (surface sandblasted), with reinforcing ribs on the outer surface. The shell is well sealed and coated with heat-resistant paint on the outer surface.
Combustion chamber and insulation
According to the "Technical Specification for Industrial Organic Waste Gas Treatment by Thermal Storage Combustion Method" HJ 1093-2020, the thermal storage combustion device should be internally insulated as a whole, and the external surface temperature should not exceed 60 ℃. The combustion chamber shell is made of 6mm Q235B steel plate, reinforced with steel sections. The insulation layer adopts ceramic fiber insulation with a thickness of about 250mm, including two layers of ceramic fiber felt and one layer of ceramic fiber module. The ceramic fiber module is equipped with a heat-resistant steel skeleton, which is fixed to the furnace shell with anchors. The insulation effect at 1260 ℃ is better than that of ordinary aluminum or high-purity fiber cotton.
Thermal storage ceramics
The equipment uses dense cordierite material as a thermal storage ceramic, which has significant advantages in heat shock resistance and low thermal expansion coefficient compared to ordinary ceramics. It is more suitable for waste gas treatment under heat exchange conditions than materials such as ordinary ceramics.
Characteristics of MLM series ceramics:
1. MLM has good anti clogging properties;
2. Multi layer ceramic board module design, with no residual thermal stress in the heat storage ceramic after heating up;
3. The pressure of the airflow passing through the MLM is reduced, which lowers operating costs;
4. Uniform airflow distribution, high turbulence intensity, and high heat transfer efficiency;
5. MLM 90 degree cross installation avoids the problem of pressure drop surge caused by installation misalignment. It has strong adaptability for on-site installation and is easy to maintain.
RTO combustion system
Adopting Macson/North American industrial burners. The system includes a combustion controller, flame detector, high-pressure igniter, and corresponding valve combination. The high-temperature sensor inside the furnace can provide feedback on the furnace temperature information, which is used to control the heating capacity of the burner and stabilize the furnace temperature at around 800 ℃.
RTO wind direction switching valve
All RTO wind direction switching valves adopt direct push cover valves, which have high precision, small leakage (≤ 1%), long service life (up to 1 million times), rapid opening and closing (1s), and reliable operation. The actuator adopts pneumatic actuator, including solenoid valve and cylinder. The compressed air pressure of the pneumatic actuator is 0.4-0.6MPa.
RTO control system
This system adopts Siemens PLC programmable control. The system mainly consists of regulating objects (furnace temperature), detection components (temperature measuring instruments), regulators, and actuators. Install human-machine interface (HMI) equipment in the control cabinet to provide on-site operation prompts, fault alarms, display operating parameters, set control parameters, and control equipment.
Product Features
1. High concentration exhaust gas treatment achieves self heating combustion, with low operating costs and reasonable cost-effectiveness;
2. High purification efficiency, three chamber RTO can reach 99.5%;
3. Using ceramic thermal storage as heat recovery, preheating and thermal storage alternate operation, with a thermal efficiency of ≥ 95%;
4. The steel structure of the furnace body is reliable, the insulation layer is thick, the operation is safe and reliable, and the stability is high;
5. PLC programmable automation control, high degree of automation;
6. Wide applicability, capable of purifying any organic waste gas;
7. Waste heat utilization has high economic benefits, and excess heat energy is reused in drying rooms, ovens, etc. The heating of the drying room does not require additional fuel or electricity consumption.
