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3.5 Warehouse air preheater
3.5 points empty preheater
Compared with the traditional three compartment design, the 3.5-compartment air preheater has the comprehensive advantages of "low resistance, low air leakage rate, and low exhaust temperature", especially with excellent anti clogging characteristics, which can solve the current common problem of air preheater clogging. The specific implementation method is to recover the air leakage at the hot end of the air preheater (with a temperature of up to 300 ℃) through a leakage fan, and then connect it to the secondary air cold end after being pressurized by the fan. The sealing pair design of the cold end ensures that the recovered high-temperature leakage does not mix with the cold air, and flows independently through a storage element in a compartment, establishing a local high-temperature and high flow rate area. Through "high-temperature gasification, fly ash abrasion, and accelerated stripping", the accumulated ash is removed online and in real time, completely solving the problem of ash blockage in the air preheater caused by denitrification and ultra-low emission transformation.
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Product Features
To prevent ash blockage in the air preheater, maintain the flue gas side resistance at the design value level or no more than 120% of the initial operating value for a long time;
Recovering a large amount of air leakage from the hot end of the air preheater, reducing the air leakage rate to below 3% under full load conditions;
Increase the effective utilization area of thermal storage components, improve the cleanliness of thermal storage components, and reduce the exhaust temperature by 3-15 ℃;
Allow the frequency of steam blowing to be reduced to once per day without causing clogging of the air preheater, thereby saving a large amount of high-quality steam and extending the service life of the thermal storage components;
Allowing up to 10ppm of ammonia to escape from the denitrification system without causing ash blockage in the air preheater, creating conditions for extending the service life of denitrification catalysts;
Allowing the exhaust temperature to be lowered to between 100-115 ℃ for a long time without causing ash blockage in the air preheater, the potential for reducing exhaust losses can be deeply explored by adopting technical measures such as shutting down the warm air heater and hot air recirculation system, using non enamel high-efficiency thermal storage elements, increasing the height of thermal storage elements, and replacing the waveform of thermal storage elements. This is expected to improve boiler efficiency to a high level of 95%.
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