Process of two-chamber RTO incinerator
The organic waste gas is fed into the regenerator 1 through the induced draft fan for heating, absorbs the heat stored in the regenerator, and then enters the incinerator for further combustion and rises to a set temperature. In this process, the organic components are completely decomposed into CO2 and H2O. Because the exhaust gas absorbs the heat recovered in the previous cycle in the regenerator 1, the fuel consumption is reduced.
The treated high-temperature exhaust gas enters the regenerator 2 for heat exchange, and the heat is absorbed by the regenerator and then discharged. The heat stored in the regenerator 2 will be used in the next cycle to heat the newly input exhaust gas.
After the process is completed, the system automatically switches the inlet and outlet valves to change the flow direction of the exhaust gas, so that the organic waste gas enters through the regenerator 2, and is discharged after the heat exchange by the regenerator 1 after the incineration treatment. This alternate switching and continuous operation.
The main body shape is a circular cylinder. The cylinder structure includes a combustion chamber, a regenerator, a rotary valve and so on. The furnace body is divided into 12 chambers, 5 air inlet chambers (preheating zone), 5 air outlet chambers (cooling zone), 1 purge chamber and 1 isolation chamber. The rotary valve is driven by a motor to rotate continuously and at a constant speed. Under the action of the distribution valve, the exhaust gas slowly switches continuously among the 12 chambers. When the organic waste gas VOCs enter the heating zone from the air inlet at the bottom, the gas temperature is heated to a certain temperature and then enters the combustion chamber of the engine at the top, where it is completely oxidized. The cleaned high-temperature gas leaves the combustion and oxidation chamber, enters the cooling zone and sends heat to the heat storage body. The gas is cooled and discharged through the gas regulator, while the porcelain heat storage body in the cooling zone absorbs and preheats, using the following cycle Heat the exhaust gas.
The main application areas of refractory materials for RTO incineration equipment are the regenerator, combustion chamber and chimney. The temperature of the combustion chamber is 760~900℃. The refractory materials mainly require resistance to organic gas corrosion and heat preservation. The current RTO incineration equipment mainly uses ceramic fiber modules; The hot cell material is made of porous mullite honeycomb ceramic; the temperature of the chimney is below 400℃, which is relatively low, and the use of acid-resistant and corrosion-resistant castables can meet the requirements. It should be noted that when the VOCs gas is fluorine-containing acidic gas, it is necessary to make adjustments to the gas composition and concentration to meet the use.