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Anonymous users2024-02-11The acrylic resin glue drying exhaust gas is carbon dioxide.
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Anonymous users2024-02-10Adsorption method, catalytic combustion method, adsorption method, absorption method, incineration method, chemical washing method, biological method, etc. are commonly used in organic waste gas treatment. Because acrylic acid and ester are odorous gases and have strong volatility, Shanghai Anjule Company adopted a regenerative catalytic combustion device after considering the treatment effect and cost.
The regenerative catalytic combustion device is composed of a catalytic burner, a filter, a flame arrester, a control valve, a fan, a pipeline and an electric control box. This device has novel structure, advanced technology, excellent purification performance, and a purification rate of 96. At the same time, due to the use of regenerative heat exchanger, its heat exchange efficiency is more than 95%, the operating energy consumption and operating cost are low, when the VOC concentration is 1000-1500mg m3, it can be self-heating equilibrium (non-consumption operation), and the total average energy consumption is much lower than the energy consumption of various existing combustion treatment methods (TO, CO, RTO), and even lower than the energy consumption of suction and desorption catalytic methods.
The control system of this device adopts PLC, touch screen, inverter and high-quality brand electrical components, with excellent performance, fully automated, intelligent and easy to operate, and a manual control system is set up at the same time for inspection and adjustment.
The main engine of this device is a catalytic burner, which uses a catalyst to oxidize toxic substances (HC compounds) in the exhaust gas into non-toxic CO2 and H2O, and its conversion law conforms to the following chemical reaction equations:
4cmhn+(4m+n)o2→4mco2+2nh2o+q
Generally, the complete oxidation of VOC (direct combustion or thermal combustion) requires a higher temperature and a longer residence time, taking benzene as an example, if there is no catalyst, to achieve the purpose of complete oxidation, its temperature needs to be above 760 800, and the residence time needs to be at least 1 2s, with the participation of the catalyst, the complete oxidation temperature and residence time are significantly reduced, only 280 320 and, some difficult to control VOCs, such as polycyclic aromatic hydrocarbons, waste gases containing resin particles and organic matter that has formed gas melt adhesives, etc., Generally, it can be completely oxidized at a temperature of 450 550 or a little higher. The superiority of the catalytic combustion method is fully demonstrated. There are currently 3 series of catalysts on the market:
Metal honeycomb catalyst, ceramic honeycomb catalyst, ceramic spherical catalyst. Compared with spherical catalysts and ceramic catalysts, metal honeycomb catalysts have the characteristics of high activity, high mechanical strength, good thermal stability, small pressure drop, easy cleaning and long service life, and have been widely used in the petrochemical industry. Therefore, this device adopts the best honeycomb precious ceramic catalyst; Catalyst cross-sectional density:
400 meshes square inches; Catalyst pressure drop: 240mmH2O
After catalytic combustion, the acrylic acid and ester waste gas is discharged through a 20-meter chimney, and the flue gas produced by it reaches the GB16297-1996 "Comprehensive Control Standard for Air Pollutants". Combustion efficiency: ; Incineration removal rate: .
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Oh, it's the ester that reacts polyester with acrylic.
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