The RTO regenerative thermal oxidizer utilizes a typical gas-solid phase catalytic reaction, which essentially involves oxygenation reactions with active oxygen. During the regenerative combustion process, the catalyst facilitates complete oxidation of the useful substances at low temperatures (200-400℃). The role of the catalyst is to reduce the activation energy, while its surface also exhibits adsorption properties, concentrating reactant molecules on the surface to enhance reaction rates and accelerate the process.
Utilizing a catalyst enables the effective combustion of waste gases at lower ignition temperatures, resulting in flameless burning and the separation of oxygen into CO2 and H2O, while releasing a significant amount of heat energy. Consequently, it consumes less energy, is easy to operate, and offers a decent purification rate. This technology is widely applied in industries such as chemicals, spray painting, insulation materials, varnished wire, and paint production, where waste gases with little recyclable value need to be purified, and there are numerous standardized equipment options available.
Process Features of the RTO Regenerative Thermal Oxidizer
The RTO regenerative thermal oxidizer boasts a notable purification speed.
2. The RTO regenerative thermal oxidizer process is used for waste gas purification, which can simultaneously remove various useful pollutants. It boasts advantages such as a simple process flow, compact equipment, and stable operation.
3. The RTO regenerative thermal oxidizer boasts the advantage of low operating costs and a decent heat recovery rate.
The RTO regenerative thermal oxidizer's manual oiling and lubrication unit features a simple structure, primarily used for the scattered lubrication points of general machinery equipment. Manual oiling and lubrication results in low lubricant utilization. It is generally used for lubrication of low-load, low-speed friction pairs. The commonly used manual oiling and lubrication units have been standardized. The centralized lubrication unit for regenerative combustion equipment is mainly used for lubrication systems with numerous lubrication points on the equipment, offering both intermittent and continuous lubrication forms. Centralized lubrication reduces manual labor for operators and improves lubrication efficiency. Depending on the lubricating material used, there are centralized lubrication units for thin oil and dry oil. The lubrication systems vary by equipment, with most of the main system components already standardized, making maintenance of the equipment's lubrication systems more convenient.
The selection of RTO regenerative thermal oxidizers should consider the following points:
The ignition process involves detecting the小火's flame with an ultraviolet sensor, followed by opening the main gas valve. At this point, the furnace plate undergoes flame combustion until the temperature signal reaches the set ignition-off temperature. The ignition valve then closes, completing the ignition process and transitioning into the combustion adjustment phase.
2. The ignition temperature and the frequency at which the variable frequency drive starts can be set separately to control the air volume of the fan. The ignition temperature is to determine the characteristics of the ignition process. The start-up frequency determines the flame combustion of the regenerative burner just after ignition, at which point the combustion should not be too low and the air volume should not be excessive.
3. The adjustment of the air-fuel ratio for the combustion operation of the burner, the air ratio range during regenerative combustion is generally between 4% to 11%. Under combustion conditions, it can achieve excellent regenerative combustion effects, with the combustion system having a high thermal rate while also achieving good emission performance.
4. The addition of a catalyst does not alter the original chemical equilibrium; it merely affects the rate of the chemical reaction, and the properties of the catalyst itself do not change before and after the reaction. The regenerative combustion equipment is mainly composed of components such as the activated carbon adsorption box, fire arrester, heat exchanger, catalytic reaction bed, and fans. The selection of regenerative combustion equipment should be based on one's specific needs.
5. When the control system is in standby mode and receives an input start command, it will transition into the combustion operation state. Initially, the control system performs an auto-inspection, followed by a pre-blowing process. The variable frequency inverter outputs a signal to control the fan's rotation, gradually increasing the air flow from low to high and then back to low. Fresh air is blown across the combustion chamber to ensure there are no residual gases inside, thereby confirming the ignition process.
The RTO regenerative thermal oxidizer condenses large volumes of low-concentration waste gases into small volumes of high-concentration gases, reducing both initial investment and operating costs while enhancing VOCs waste gas treatment. It is divided into treatment, circulation, and cooling zones, each operating continuously. As low-concentration volatile useful compounds pass through the honeycomb zeolite, the compounds are adsorbed, and the purified gas is released into the atmosphere or indoors for recovery. Heat energy is recovered through this process. The honeycomb zeolite, which adsorbs VOCs, continuously rotates, and a small amount of hot air undergoes desorption cycles in the desorption module. During this process, high-concentration gases can be obtained from low-concentration waste gases.
RTO regenerative thermal oxidizers primarily come in two types: drum-type and tower-type. Below, we'll delve into a detailed introduction of each:
1. Tube Rotors. Tube rotors are a new type of rotor that has emerged in recent years. These cylindrical rotors have only adsorption and desorption zones, without a cooling area, and rely on their large surface area for natural cooling. The tubular rotating zeolite features a modular design, allowing for single-module installation or replacement, offering good flexibility and ease of replacement.
2. Disc Wheel. The disc wheel is a traditional wheel. The basic structure of the disc wheel system consists mainly of components such as a molecular sieve adsorption rotating core, gas filter unit, rotating mechanism, and fans. The adsorption rotating core is the core part, which can be divided into three zones: adsorption area, circulation area, and cooling area, through the high-temperature-resistant partition plate.
