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Cause of filter bag jam in dust collector
filter bag jam reason
Core tip:bag in the use of common damage reason 1, dust bag, improper installation: A installation process chaos, cage and filter bag for irregular, or cause the filter bag bag cage is extruded and deformed; the filter bag is not B, will cause friction between the long vertical filter bag and bag bag and plate. In the bag damaged; C, blowing askew, blowing pressure is too high or the injection frequency is too high, easy to cause the opening ring is damaged, even bag head and a bag body separation.
filter bag in use common damage reason
1, dust bag, improper installation: A installation process chaos, cage and filter bag for irregular, or cause the filter bag bag cage is extruded and deformed; the filter bag is not B, will cause friction between the long vertical filter bag and bag bag and bag wall, cause damage; C, blowing, blowing askew the pressure is too high or too high frequency injection, easy to cause the opening ring is damaged, even bag head and a bag body separation.
2, production equipment is not excellent: A, bag cage rough machining, if there is rust, welding scar, burr, welding and other phenomena, will accelerate the mechanical wear of the filter bag; B, plate deformation, flatness is not up to the requirements of 2/1000, and even distorted uneven phenomenon, resulting in the vertical of the bag cage the bag bottom will cause mutual collision, elastic steel ring and the inside of the bag so that the bag is easy to damage, installation and sealing are not guaranteed, so as to form a leak and filter bag damage; C, plate hole deviation, when the flower board also appeared 2 3mm deviation, the bag will not take the bag in place, will cause the shedding and flower plate hole ash or lead bag, bag type dust collector can not run.
3, dust removal equipment temperature instability: A, the higher the temperature of flue gas, chemical reaction is faster, the oxidation and other chemical reactions of sensitive material, easily damaged in such operating conditions, which lead to its life greatly reduced. B, dust removal equipment in operation, must always keep the temperature in * * above, if the temperature is below this limit, the flue gas water vapor condenses, condensed water vapor mixing dirty smoke may produce corrosive acid dew corrosion, bag or paste bag, bag or dust caused by shortening the life of equipment operation the resistance to increase, will make a serious collector to run. C, dust temperature, smoke with sparks will often burn the filter bag.
4, filter material selection is not reasonable: A, commonly used polyester and aramid filter filter filter is the most prone to hydrolysis, the content and the temperature of the gas in the water is high, the damage caused by hydrolysis faster in contain water vapor or wet conditions, should not use this type of filter material; B, commonly used polypropylene filter and polyphenylene sulfide filter is easily oxidized, so when the oxygen content is more than 15% of the conditions, should not use this kind of dust filter; C, if you use a glass fiber filter material from fluorine gas purification environment damage faster.
some suggestions and measures to prevent filter bag breakage
A, the number of vertical ribs should be reasonable according to the material of the filter material, and smooth, smooth, hairless defects, enough strength, perpendicularity to the industry standards, and good match with the filter bag.
B, flower plate flower plate hole smooth, smooth surface, flower plate hole safe distance between the larger plate spacing, the box wall, to prevent plate error, skeleton tilt, leading to the bag so that the bag between collision wear.
C and pulse nozzles should be vertical, and should be concentric with the flower plate holes, the error is less than 2mm.
D, has an important influence on pulse nozzle arrangement of bag type dust collector pulse cleaning, pulse nozzle has an optimum distance from the filter bag is too small, and the induced air flow is insufficient, the upper opening of the bag is easy to damage; too large, air pressure pulse attenuation is too large, is not conducive to flow towards the inside of the bag. The specific pulse distance is related to pulse nozzle diameter, pulse air flow parameter and bag diameter. It is necessary to ensure that the pulse air flow and the induced air volume are larger than the volume of the filter bag.
E and the air inlet plate of the dust collector need to set an air distribution plate, so that the airflow distribution of each box is relatively uniform, and the position and number of the air distribution plate have a great influence on the distribution of air flow.
There should be a safe distance betweenF and the bag bottom and hopper, hopper should be a high level, an ash discharging excessive, should be timely.
BeforeG, the installation site should be clean, filter bag, filter bag skeleton injection pipe and other facilities placed orderly, clean the impurities and dust removal equipment, the installation process should be arranged in good order, cannot have the effect of filter installation of cross operation.
H, in order to eliminate the possible sparks in the smoke, the most effective precautions are to install the spark trap before the smoke enters the dust collector and remove the sparks from the flue gas.
I, affected by the regional climate difference, requires the sealing of the dust collector is better, the box insulation, to prevent dust removal equipment partial cooling condensation.
J, filter bag installation is complete, before the dust removal equipment starts running, lime powder and talc powder should be used to pre spray the filter bag. The quality of the filter bag is not only related to the quality of the filter bag itself, but also related to the reasonable design of the dust collector and the installation, operation and maintenance of the bag.
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