Bag dust removal

Row-jet pulse dust collectors can use online or offline cleaning methods. Online dust cleaning refers to the process in which the filter bags continue to filter flue gas while pulse jetting is taking place. The injection system requires a relatively high-pressure injection stream to block and filter the flue gas, while simultaneous pulse oscillations are used to dislodge the dust cake and send it into the ash hopper (see the JetPump diagram in A5.1). The interior of the online dust cleaning dust collector is a large, static air chamber with a relatively uniform airflow distribution, which results in minimal variations in the filtering load on the filter media and thus helps to extend the service life of the filter bags. An offline dust cleaning system requires dividing the interior of the dust collector into several sealed air chambers; baffles are installed at the air outlets on the ceiling of each chamber, along with compression air control systems such as cylinders and solenoid valves. Before performing pulse cleaning injection on a certain gas chamber, it is necessary to first control the baffle so that this gas chamber stops filtering flue gas. Therefore, the offline dust cleaning mechanism is relatively complex and features movable mechanical baffles. Therefore, the cost and maintenance requirements of offline dust removal devices are relatively higher compared to those of online dust removal devices. In fact, designers of dust removal and cleaning systems should flexibly choose between online or offline cleaning system designs based on the properties of the flue gas and the requirements of the process. In some special processes such as waste incineration, the dust properties are loose, making it difficult for it to form lumps; thus, effective dust removal is also challenging. The offline dust removal method can reduce \"secondary dust generation\", making the dust removal process more thorough and thereby lowering the resistance of the equipment. On the other hand, after an offline dust removal device has completed dust removal in one air chamber, the resistance of the filter bags in that chamber will be lower than that of the filter bags in the other chambers that are still in use for filtration. At this time, when the baffle is opened, the filter media in the gas chamber will be subjected to a very high filtration load, resulting in excessively high cycles of load variation on the filter media, which in turn shortens their service life. With online dust cleaning, only the resistance of one row of filter bags is reduced at a time; the numerous other filter bags inside the dust collector continue to carry out filtration tasks. As a result, the change in the filtration load on the filter bags that have just been cleaned is relatively mild. For more details, please visit: http://www.btpenghe.com.cn/ser-842.html