RTO and RCO performance comparison.

RTO is the process of heating organic exhaust gases above 760 degrees Celsius, so that VOCs in the exhaust gases are oxidized into carbon dioxide and water. The high temperature gas produced by oxidation flows through the special ceramic heat storage body, which heats up the ceramic body and "heat storage", which is used to preheat the subsequent entry of organic exhaust gas, thus saving the fuel consumption of the exhaust gas heating up. Ceramic heat storage body should be divided into three (including three) or more areas or rooms, each heat storage room in turn through heat storage - heat release - cleaning procedures, round and round, continuous work

. The heat storage chamber "heating" should be immediately introduced after the introduction of some of the treated clean exhaust to clean the heat storage room (to ensure that the VOC removal rate of more than 99%, only after cleaning is completed to enter the "heat storage" procedure. RTO heat storage waste gas treatment equipment, which is characterized by: low operating costs, organic exhaust gas treatment efficiency advantages, adapt to the exhaust gas concentration of 1000 to 10000mg/m3, decomposition efficiency: 99%-99.5%. Is currently the most economical and reliable to meet the 50mg/m3 strict emission standards of VOCs governance technology, has been widely used.
RCO, refers to the heat-storage catalytic combustion method, known in English as "Regenerative Catalytic Oxidation Oxidition". The principle of RCO heat storage catalytic combustion is: combined with heat storage oxidation and catalyst oxidation, fill the catalyst in the upper part of the ceramic heat storage body, with the help of catalyst to make organic exhaust gas at a relatively low ignition temperature (280-500 degrees C) The oxidation is broken down into CO2 and H2O, and the high temperature gas produced by oxidation flows through another heat storage chamber to continue to catalyze the oxidation reaction to release heat, so that the ceramic body heats up and "heat storage", which is used to preheat the subsequent entry of organic exhaust gas.
RCO device is similar to the RTO device, with a bed-type and rotary design, the bottom of the heat storage chamber is filled with ceramic heat storage bodies, and the catalyst is filled between the ceramic heat storage body and the oxidation chamber.
RTO and RCO performance comparison table (processing air volume 30000m3/h) . 1), compliance
RCO is commonly used as a precious metal honeycomb catalyst with zircon ceramic honeycomb as the carrier, and precious gold Pd and Pt as active ingredients. Since catalysts are selective to exhaust gas components and cigarette packet printing is mixed with a variety of component solvents, no catalyst can ensure that all components VOC can be completely oxidized and decomposed
;
2), energy-saving
thermal efficiency refers to the actual use of heat and theoretical use of the ratio of total heat (see formula 1-1). The surface heat loss and residual heat re-use ability of RTO furnace body are two important factors that affect its thermal efficiency. RtO thermal efficiency was tested at 97% and RCO thermal efficiency at 95%.
such as: exhaust gas temperature of 30 degrees C, RTO oxidation chamber temperature of 800 degrees C, import and export temperature difference of 20 degrees C, export temperature of 50 degrees C;
exhaust gas temperature of 30 degrees C, RCO oxidation chamber temperature of 450 degrees C, import and export temperature difference of 20 degrees C, export temperature of 50 degrees C;
the RTO heat storage brick filling capacity of 16m3, in the cold furnace start-up conditions, the rotary RTO power-on heating up to 800 degrees C time of 1.5h. RCO heat storage brick fill is 8m3, and the catalyst of the ceramic carrier is 2.5m3, under normal start-up conditions, the RCO power-on heating up with less ceramic filling amount to 400 degrees C is 0.7h. The RCO consumes less heat during the cold start phase.
3), Economy
In terms of the economic performance of equipment manufacturing, RTO and RCO heat storage ceramic fills 16m3 and 8m3, respectively, but RCO also needs to fill 2.7m3 catalysts (catalysts at 15 air speeds) 000 h-1 selection, catalyst dosing amount (air volume ÷avillation) ×10/12 s 2.4, taking into account the actual filling of the catalyst, the actual need to fill the catalyst at 2.7m3). The price of precious metal catalysts under the common brand is about 170,000 yuan/m3, and the overall structure and other configurations of RCO and RTO are basically the same, i.e. the investment of RCO equipment is about 1.2 times that of RTO equipment.
RCO catalyst has a service life of 8000-10000 hours, e.g. production conditions of 24h, 280 days/year, i.e. the life of the catalyst is about 1.5 years, ceramic heat storage body life of about 8 years. RTO due to the replacement of ceramic heat storage body maintenance costs of about 24,000 yuan / year, RCO due to the replacement of catalysts and ceramic heat storage required maintenance costs of about 318,000 yuan / year, RCO other components maintenance and RTO the same.
4), applicability
. RTO is suitable for the treatment of exhaust gases in production processes with high continuous emission concentrations, and can be effectively treated for all VOCS organic exhaust gases volatile in production processes, and
RCO cold start-up is fast and low cost, and is suitable for intermittent production conditions. The exhaust gas can not have S, P, AS, halogen and other components that poison the catalyst, and the trace dust in the exhaust gas needs to be filtereddeeply, otherwise it will affect the effect of the catalyst
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