Some knowledge points of regenerative oxidation furnace

　　The manufacturer of regenerative oxidation furnace believes that volatile organic compounds (VOC) are an important component of air pollutants. At present, the common VOCs treatment methods at home and abroad mainly include activated carbon pressure swing adsorption, photocatalytic oxidation, solution absorption and high-temperature oxidation. Among them, the high-temperature oxidation method has a high efficiency in treating VOC waste gas and is widely used. Regenerative oxidation furnace (RTO) is a popular high temperature oxidation treatment equipment for VOC waste gas at home and abroad. The mainstream RTO product is car tower RTO. The three box tower RTO furnace can meet the requirements of processing efficiency and economy. The mainstream three chamber RTO is applicable to VOCs purification with waste gas volume of 10,000~30,000 m3/h.

The working principle of the regenerative oxidation furnace is: first, the waste gas is preheated to a certain temperature by the heat accumulator, and then the organic molecules in the waste gas are oxidized and burned into carbon dioxide and water in the combustion chamber. The high-temperature gas generated by combustion flows through the heat accumulator again to heat the heat accumulator. This "heat accumulated" is used to preheat the new exhaust gas entering the furnace. The inlet and outlet air of the regenerator is continuously switched by the reversing valve to form a continuous working cycle.
Regenerative oxidation furnace manufacturers believe that a large number of technologies to control nitrogen emissions during combustion are widely promoted at home and abroad, which can be divided into low NOx burner technology and excessive air combustion technology. From the perspective of NOx generation mechanism, most NOx is generated during combustion. Technicians change the combustion conditions (usually the temperature conditions in the combustion area) and fuel supply during the combustion process by changing the structure of the burner, so as to achieve the purpose of controlling NOx generation. According to the influence of combustion conditions on NOx emission and the formation mechanism of NOx, the burner has been improved from the aspects of "gas classification, air classification, formation of obvious combustion zone, and formation of flue gas reflux" to reduce NOx emission. Heavy oil burners mostly use staged combustion technology, while gas burners mostly use premixed lean oil combustion technology. Compared with the latter premixed lean burn technology, they produce less NOx. During the use of low nitrogen burners, the characteristics of different combustion denitrification technologies are different, and the corresponding burner layout is also different.
The manufacturer of regenerative oxidation furnace believes that the dry denitrification technology is a method to reduce NOx in waste gas to N2 or convert it to nitrate for recycling. At present, dry denitration technologies at home and abroad mainly include selective catalytic reduction SCR technology and non catalytic reduction SNCR technology. The principle of SCR technology is to use catalyst to reduce the temperature of redox reaction. The reduced N2 is pollution-free and has good treatment effect.
The manufacturer of regenerative oxidation furnace believes that V2O5 and MnO2 are commonly used catalysts for SCR technology. When selecting SCR catalyst, it is necessary to analyze the cause of catalyst poisoning caused by impurities in the gas and give reasonable consideration. At present, more durable catalysts are being researched and developed all over the world. The principle of SNCR technology is to directly inject reducing agent into the furnace without catalyst to decompose nitrogen in waste gas into N2 and H2O. The advantage of SNCR technology is less investment. However, its disadvantages are large ammonia consumption and low efficiency.