The filter bag is the core filter component of the bag filter, which can be said to be the heart of the bag filter, and its cost accounts for about 10% to 15% of the equipment cost. The material of the filter bag made of the filter bag directly determines the performance parameters of the bag filter, such as the specifications of the dust removal equipment, dust removal efficiency, emission concentration, operation resistance, service life and other indicators. The filter bag plays a decisive role in the use effect of the bag filter. In particular, the high temperature filter bag accounts for a large proportion of the value of the entire dust collector. Protect the filter bag to prevent the filter bag from being damaged due to various reasons. On the one hand, it can ensure the filtering effect and meet the emission concentration; on the other hand, it can reduce the economy. Loss, to ensure the stable operation of the entire equipment. The damage type of the filter bag is mainly manifested as the non-woven layer of the filter material wears and falls off. This phenomenon is caused by uneven air distribution and dust washing on the surface of the filter bag under high filter wind speed; or because the filter bag is not installed in place, It causes friction between the filter bags and damage; or the installation of the injection pipe is not vertical, causing holes in the 30-40 cm range of the mouth and loss of filtering performance. The specific manifestations are damage to the mouth of the filter bag, damage to the body of the filter bag, damage to the bottom of the filter bag, and damage to the bottom of the filter bag. The specific reasons are as follows: 1. There is air leakage in the dust collector. Due to the air leakage in the dust collector, a large amount of cold air from the outside is sucked into the dust collector, causing the local air temperature of the dust collector to drop sharply, and the water in the air is analyzed. This will cause condensation. 2. The moisture content in the flue gas is too high. When the moisture content in the flue gas is too high and the supersaturated water is analyzed, condensation will occur. This phenomenon is particularly prominent in the kiln tail dust collector of the cement dry process line. Because the flue gas at the kiln end of the cement dry process line is generally cooled and tempered by a humidification tower, when the amount of water sprayed is too large, it will cause the smoke in the flue gas. Condensation occurs when the moisture is oversaturated. 3. When the temperature of the flue gas is too low, the temperature of the flue gas processed by the dust collector is close to or lower than the dew point temperature, condensation will also occur. 4. Moisture enters the dust collector due to the phenomenon of 'four-tube burstThe production of the bag filter bag, only through the exquisite sewing technology, can not really exert the performance of the filter bag. It is necessary to consider the filter bag itself when designing the structure of the bag filter and setting the operating parameters. Relatively small air permeability, surface filtration and other characteristics, and corresponding measures can be taken to ensure that the entire bag dust removal system achieves the ideal operating effect to the greatest
extent. The damage phenomenon of the filter bag in the actual application process is normal, but through careful analysis and summary, the filter bag is more damaged due to the above reasons. Improvements in the installation, selection, and maintenance of filter bags in the future can avoid such phenomena. Give full play to the efficiency and economy of filter bag dust removal of the bag filter. Environmental protection is of great responsibility. We hope that our researchers will develop new and more filter materials that can adapt to complex environments and cope with smoke and dust under various working conditions. At the same time, through a large number of actual tests, optimization is carried out to meet the needs of dust removal technology and benefit mankind. . 》》More Bag Dust Collectors
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