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RTO regenerative oxidation furnace
RTO is an efficient organic waste gas treatment facility. With the traditional catalytic combustion, direct combustion type thermal oxidation furnace (TO) compared with high thermal efficiency (more than 95%), low operation cost, can handle large volume of low concentration gas, the concentration is high, but also for the two heat recovery, greatly reduce production cost.
RTO (Regenerative, Thermal, Oxidizer, referred to as RTO), regenerative oxidation furnace. The principle is in the high temperature of exhaust gas in organic matter (VOCs) oxidized into carbon dioxide and water respectively, thereby purifying exhaust gas, exhaust gas recycling and decomposition of released heat, three RTO exhaust gas decomposition efficiency can reach above 99%, the heat recovery efficiency reaches above 95%. The main structure of RTO consists of combustion chamber, regenerator and switching valve. According to the actual needs of customers, choose different heat recovery methods and switching valve mode.
Working principle
The principle is to heat the organic waste gas to 760 degrees Celsius (which needs to be looked at), so that the VOC in the exhaust gas is broken down into carbon dioxide and water by oxidation. The high temperature gas produced by oxidation flows through a specially made ceramic regenerator to raise the temperature of the ceramic body and "heat storage", which is used to preheat the subsequent organic waste gas. Thereby saving exhaust gas heating up fuel consumption. Ceramic regenerator should be divided into two (more than two), each regenerator in turn undergo heat storage, heat release - cleaning procedures, cycle and continuous work. When the regenerator is exothermic, a proper amount of clean air should be introduced immediately to clean the regenerator (to ensure that the VOC removal rate is above 98%), and only after the cleaning has been completed can the heat storage procedure be reached. Otherwise, the residual VOCS will be discharged to the chimney with the flue gas, thereby reducing the treatment efficiency.
Applicable exhaust gas
The use of organic waste gas categories: alkanes, olefins, alcohols, ketones, ethers, esters, aromatics, benzene and other hydrocarbons, organic waste gases.
Low concentrations of organic compounds (both lower than 25%LFL) and large air volume
Waste gases contain a variety of organic ingredients, or organic compounds, which change frequently
Contain exhaust gases that are susceptible to poisoning or active decay of the catalyst
Development classification
The first generation RTO is a single - style structure, with the simplest one in and out for the romantic.
The second generation RTO uses valve switching and is the most common type of RTO. The utility model is composed of two or more ceramic filling beds, and the direction of the air flow is changed through the switching of the valve, so as to achieve the purpose of preheating the VOC exhaust gas.
The third generation RTO with rotary shunt orientation, and the single body sealing unit of heat storage furnace is divided into a plurality of parts, the non-stop rotation of the VOC guide to the regenerator unit for oxidation.
The fourth generation of RTO is the new heating equipment management integration, referred to as BHI (Burning Heating Integrated), the rotary valve shunt, multiple regenerative compact combined into a combustion chamber, a built-in heat exchanger or air conditioning, to control the exhaust gas and meet the demand for heat.
Performance characteristics
Advantage£º
Almost all the waste gases containing organic compounds can be disposed of
It can handle organic waste gases with large air flow rate and low concentration
The flexibility of treating the flow of organic waste gas is very high (nominal flow rate 20%~120%)
It can adapt to the variation and fluctuation of composition and concentration of VOC in organic waste gas
It is insensitive to a small amount of dust and solid particles in the exhaust gas
The highest thermal efficiency (>95%) in all combustion heat cleaning processes
Under proper exhaust gas concentration conditions, self heating operation can be realized without adding auxiliary fuel
Clean efficiency is high (three rooms >99%)
Maintenance little workload, safe and reliable operation
The organic sediment can be periodically removed and the regenerator can be replaced
The pressure loss of the whole device is small
The device has a long service life
Shortcoming:
The device is heavy in weight because of the ceramic regenerator
The device is bulky and can only be placed outdoors
• request continuous operation as much as possible
The one-time investment costs are relatively high
It is not possible to thoroughly purify the organic compounds containing sulfur, nitrogen and halogens