1, pulse injection cycle, the initial lack of dust layer
Studies have shown that excessive filtration of the gas velocity will cause the initial dust layer to break, and the dust will impact the filter bag and cause excessive wear. If the blowing bag is too high at this time, the fabric of the bag is loosened The filter is easy to break.
In the set dust collector pulse injection cycle, in order to ensure that the dust collector work in a stable pressure, set the pulse injection cycle time is the longest, pulse cleaning time to ensure that the initial dust does not fall off, set the The time to blow the shortest as well, if the initial dust layer is insufficient, you can use the extension of the injection cycle to make up, if the use of differential pressure control, can improve the stability of the inlet and outlet pressure regulator set.
2, wear
Too high filtration gas velocity, resulting in dust impact, wear filter bag, but also to filter bag fabric fiber tension damage, the solution: adjust the dust collector exhaust flow, when the expected flow changes, you can increase the flow of automatic control System to ensure that the dust collector work in a stable gas volume.
Dust collector air distribution uneven, easy to make high content of dust and dust directly impact the local filter bag, easy to make part of the exhaust pipe filter bag perforation, the use of the cycle is too short, the solution: in the dust collector inlet installation Inlet distribution guide, or for the frequent wear parts of the filter bag replaced with wear-resistant filter bag.
The distance between the filter bag is too small, keel bending and so easy to cause wear between the filter bag, for example, glass fiber wear between each other is very sensitive, should be adjusted, install a solid filter bag and replace the curved keel.
Filter bag and keel diameter difference between the difference is too large when the injection effect is poor, should increase the injection cycle and improve the pressure of blowing air, too small filter bag and keel friction, will accelerate wear, better with the filter The bag is 10 ~ 20mm longer than the length of the keel. The length should be the same. For some filter cloth with temperature change, and there are elongated characteristics, special attention should be paid.
As the dust collector often work, the temperature is too high and continuous air supply, the wind speed, but between the dust bag and because of the same gap between each other, because the bag is longer (length of 6 meters) when the air supply if there is no fixed, The bottom of the bag may cause friction with each other, resulting in damage to the bag.
Reasonable solution to the most effective way, Zhejiang Feng Dun filter Co., Ltd. engineers technician several times to discuss the discussion, agreed that the bottom of the bag with a fixed object, the main reason for the solution is the bottom of each bag bag cleaning fixed bracket, And in the bracket to install the bottom of each chamber welding fixed bracket, and in the bracket on the installation of vertical pipe with the bag, in the bottom of each bag at the bottom of the center of the welding with the tube perpendicular to the iron bar, then the bottom of the bag Iron bar just inserted into the vertical tube on the bracket, only in this way on the air, no matter how much wind speed, and the bottom of the bag fixed to each other, the same spacing, each other are not producing friction to avoid damage to the bag The Only in this case when the air, the bag does not dry, and filter the wind speed uniformity, in the dust effect has a good change.
Longer welding at the hole or burr, or corrosion due to the rough surface, will also accelerate the wear of the filter bag.
Filter bag and perforated plate seal is not strict, will cause the top of the bag at the fold at the wear, the use of a flexible ring on behalf of the better.
Venturi or pulse tube relative to the filter bag alignment is not correct, easy to make the upper filter bag mechanical friction, should be adjusted.
Exhaust gas dust in excess of design standards, will also make the filter bag to accelerate wear.
Dust collector set dust bucket storage too much dust, will also accelerate the wear of the filter bag.
The above reasons will make the filter bag damage, but also reduce the life of the dust collector components, should pay attention.
3, burned
Causing the dust filter bag burning reasons, mainly the exhaust gas temperature is too high to
If the dust collector's long-term treatment of the exhaust gas temperature exceeds the working conditions of the filter bag, it is easy to shrink the shrinkage of the filter bag, or melt the hole, and the exhaust gas in the exhaustion of Mars, or dust heat, may also make the filter bag into the hole, Filter bag is particularly important.
If you need to cool the exhaust gas, the use of cooling methods, pay attention to the cold air humidity, whether it contains acid and alkali ingredients, and try to ensure that the dust treatment of the exhaust gas flow temperature is higher than the dew point and above, and avoid water droplets directly into the filter bag.
In order to prevent Mars from entering the dust collector, so that the bag is burned, you can use the pretreatment method, such as: the surface of the filter bag prefabricated layer of protective layer, you can use kaolin, limestone powder. At the same time to prevent unburned carbon material in the dust collector secondary combustion.
4 filter bag is blocked
The main reason for the blockage of the filter bag is the filtration rate is too large, the dust is too fine, the dust has a sticky, filter bag cleaning bad, filter bag moisture.
Filter bag cleaning bad, including frequent cleaning times, cleaning time is too long. The amount of cleaning too frequent easy to filter bag fiber tissue loose to increase the fine dust in the exhaust gas clogging the filter bag, cleaning time is too long will filter bag surface of the initial powder layer together washed away.
If the cleaning time is too short, the dust on the surface of the filter bag has not been completely cleaned, then began to filter, dust gradually accumulated in the filter bag surface, resulting in bagging bag, in solving this problem can be several times Test run to adjust.
Filter bag damp reasons: dust collector shell seal lax, into the wet air, for the anti-blowing clean air is not clean (oil, water), for the cleaning of the compressed air is too cold.
In order to prevent the dumplings in the filter bag, in the cold area, can be used for cleaning the compressed air to increase insulation, heating, degreasing, in addition to water, in the dust after the shutdown and then continue to clean 10 to 20 minutes.
Water is the biggest reason for the clogging of the filter bag, resulting in the cause of moisture is usually caused by low temperature condensation, especially in the treatment of combustion or high temperature flue gas, such a situation can be used to prevent the following:
① avoid improper boot
② to avoid the resistance in the dust when the boot;
Open at lower than dew point;
In the dust collector after the cooling bag on the surface of the condensate when the re-boot, so enter a lot of dusty air, coupled with high humidity will lead to muddy bag surface.
In order to prevent this situation, should be preheated dust collector imported dust, or pre-dust layer.
6, filter bag life is too short summary
The quality of the filter bag; filter bag quality; filter gas velocity; dust load; dust ingredients; dust characteristics; cleaning method; cleaning frequency; system boot, downtime; and related maintenance work.
In assessing the service life of the filter bag, you should consider whether to use properly, carefully check, record the work of the dust collector, dust collector is often in the dew point following boot, shutdown, and pulse cleaning cycle, cleaning time is reasonable,
The installation of differential pressure gauge, thermometer is a prerequisite for ensuring the record. But also to ensure the normal operation of the dust collector measures.
浙江天台丰顿滤料有限公司是一家专业从事：液体过滤袋、工业滤布、滤布、滤袋、除尘袋生产销售的滤布厂家，多年来在液体过滤袋、滤袋、工业滤布、除尘袋生产上积累了丰富的经验和领先的技术。
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