Baghouse technology is a fringe science with a complex theoretical basis and influencing factors. So far, great progress has been made in the theoretical study of dust filtration mechanism. However, dust types, particle types, particle shapes, particle size distribution, dust concentration, charge characteristics, gas composition, gas temperature, gas humidity, gas pressure and acid mist dew point and other factors affecting the filtration and separation effect should be considered. It is almost impossible to find a theoretical explanation, or to build a mathematical model to derive it. Therefore, it is more with the help of field tests, laboratory simulations and engineering practice summaries.
To maintain the continuous operation of the baghouse, the filter bags must be cleaned in a timely manner. Pulse cleaning is the most effective cleaning technology at present, and the pulse valve is the most important component of the pulse cleaning system. The effect of pulse cleaning depends on the maximum reverse acceleration generated by the filter bag when the pulse valve is sprayed, and how to make the filter bag produce greater reverse acceleration is the first problem to be solved in the design of the pulse valve. At present, the commonly used indicators to measure the injection performance of pulse valves are Cv value, Kv value, injection volume, injection flow, output pressure, peak pressure, output pressure rise speed, etc., among which some indicators such as Cv value, Kv value, etc. are considered to be irrelevant to the maximum reverse acceleration, some indicators such as output pressure rise rate is considered to be closely related to it, and some indicators have no consistent opinion. A deeper study of the factors affecting the maximum reverse acceleration of the filter bag is conducive to the targeted design of the pulse valve, so as to further improve the injection performance and cleaning effect of the pulse valve.
In the dust removal device, bag filter is a kind of dust removal performance is the best dust removal performance, can meet the current strict pollution law requirements, the most reliable dust collector equipment, but regardless of its design calculation or operating conditions, it is not a theoretical engineering discipline, but an empirical technology. This state of affairs will continue for some time to come, because there are relatively few studies on bag filters and insufficient information on bag filters in books.
Post time: Aug-18-2023