During normal operation, the dust filter bag differential pressure is greater than 1500Pa (electric + bag 1200Pa) began to blow, to 800/900Pa stop cleaning. Typical pressure difference new bag is 1.0kPa, approaching the life of 2.5kPa! (5) When the boiler is in normal operation, the oxygen content in the furnace should be kept at 2% to 3%, and the oxygen content of the filter bag inlet should be less than 8%.
Control the injection pressure and extend the injection interval. The lower the resistance of the new production equipment, the lower the injection pressure/pulse width and the longer the injection interval, which is very beneficial to extend the life of the filter bag. About about 1A, the bag resistance will be Gradually tend to be stable, according to the need can be adjusted to increase the injection pressure and shorten the injection interval.
Before starting, make dust filter bag pre-spray. Check that there is enough ash in the ash storage tank, start the induced draft fan, and pre-spray the filter bag in the dust collector until the surface of the dust bag has a dust layer of 2 to 3 mm thick (approximately 3 h Above), the boiler can be oiled and ignited. To protect the filter bag, the filter bag should be pre-sprayed before each boiler ignition, and the pre-spraying effect should be checked. The ignition oil atomization is better/burning completely to prevent large amounts of unburned oil droplets. After being brought to the furnace, the dust bag of the dust filter bag is caused to reduce the smoke temperature, prevent air leakage, and adjust the cold/hot air distribution. a. Overhaul the air preheater and economizer to improve the heat exchange efficiency and reduce the smoke. Temperature below 150°C.b. Prevent air leakage from the furnace/air preheater and flue/dust catcher and reduce the oxygen content of the dust in the dust collector (less than 8%). C. Better dust collector insulation to prevent condensation Acid corrosion.d. Do a good job in the commissioning of cold/hot gas flow distribution. In the case of varying coal types and non-standard operating conditions in China, the filter bag filter bag has a reasonable service life of more than 20,000 hours. There are examples running for more than 30,000 hours. The dust filter bag service life guarantee is 30,000 hours, which is selected in conjunction with 4a overhaul 1 time. Therefore, if you follow the above design requirements strictly and follow the following operating measures, you can still do it.
Dust filter bag pre-spray principle and role
April 23 13:14:41, 2023
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