Dust bag cost is not high , but because of its use of the characteristics of a high-quality dust bag in time the average life expectancy is 2–5 years. If the selection of inappropriate or improper use will reduce its service life. But when to replace the filter bag is the most concerned thing. 1. Burning : causes dust bag burned , mainly initial layer thickness is not enough dust bag surface , the flue gas temperature is too high actions . Flue gas temperature exceeds bag filter working conditions if long-term treatment , dust bag easy to cure shrinkage , or melting of holes . If the initial layer thickness is not enough , the flue gas flow into Mars , dust or heat , dust bag may also cause burn out holes. Create new online replacement of the dust bag dust bag mainly burned . Because no post pre-coated gray line replacement , high temperature flue gas direct contact with Mars carry bag, easy to make by burning dust bag . Measures to prevent the burning : Ensure that the initial layer thickness of dust bag surface. 2.Wearing : Wear dust bag dust occurs mainly in the middle part , on a single dust bag mainly occurred within 1 meter away from the bag outlet . The main reason for the uneven distribution of smoke in the middle of the single-chamber flow rate is too high, to rely on a single dust bag filter at the outlet of the gas velocity is too high , resulting in dust impact , wear bag, dust bag also makes fabric fiber tension by loss, partial bag easy perforation cycle is too short . Dust bag frequently for wear parts replaced with wear-resistant bag . 3.The distance between the dust bag is too small , and so easy to wear and tear caused keel bend between the bag . Bags and keel diameter difference relations , poor cleaning effect is too small , will result in shortening cleaning cycle and increasing injection pressure of the air bag when too much friction with the keel , will accelerate wear . For some cloth with large temperature changes , but also the elongation characteristics , require special attention. 4.When bag cage have holes or burrs , or due to corrosion resulting rough surface will also accelerate the wear of the bag . Filter bag with perforated plate , can cause wear on the bag to the top deconvolution . 5. Venturi bag or pulse tube relative alignment is not correct , easy to make the injection tube airflow discharged directly eroded on the bag segment blemishes. Too frequent cleaning bag , the bag will accelerate wear. 6.High filtration gas velocity, initial dust layer will break , and the impact of dust bag and cause excessive wear . If the number is too high can easily lead to the cleaning cloth bag bag of loose fabric , accelerated wear of the bag . Flue gas dust exceeds the design criteria , but also make bags accelerated wear . Small hopper fouling too much, resulting in the smoke chamber flue dust bag over the General Assembly to accelerate the wear and tear . 7.Measures to reduce the wear and tear : dust bag in the production process, the weak parts were thick dust bag ; bag during the installation process, the distance is too small , curved keel to adjust the bag replacement ; dust bag with the keel to the right ( +10 ~ 20 mm ) , and the length should be consistent ; keel in use should be strictly checked damaged keel is strictly prohibited ; dust bag with flowers orifice seal should be checked not leak tight ; venturi tube and the pulse tube to correct . During operation , the speed is too high to prevent the filter , bag cleaning cycle is too short , blowing compressed air pressure is too high factor. In setting precipitator pulse cleaning cycle in order to ensure that dust to work under constant pressure , pulse cleaning cycle time set up as well, pulse cleaning time to be able to ensure that dust does not fall off the initial set time cleaning the shortest as well, if you do not start early enough dust layer can be used to extend the cleaning cycle fill reward , if pressure control , can improve the stability of the outlet pressure filter set . These situations maybe you will meet when you use the filter bag.On the one hand , you need to know how is going on protecting your filter bag, on the other hand, when something happened like before, you need to change the filter bag as soon as you can .
