Best Time to Replace the Dust Collector Filter Bag

Jun 04, 2021

Replacing the dust collector filter bag too early will increase unnecessary costs and take up maintenance time, which could have been better used for more urgent tasks. Replacing the filter bag of the dust collector too late may expose workers in the facility to dangerous dust and may cause a fire or explosion. In addition, as the filter becomes more and more clogged, the energy cost of the compressed air required for the operation of the system will rise, and the pressure on the fans and bearings of the dust removal system will also increase. So, how do you determine an accurate time to replace the filter bag of the dust collector? Anhui Yuchen Environmental Production Science & Technology Co,Ltd. will tell you as a professional manufacturer of dust collector filter bags.

It is time to change the filter indicators to three categories:

Filter is damaged

The most obvious sign of filter damage is dust flowing from the exhaust pipe of the collector or accumulating in the clean air ventilation system. The sudden and rapid drop in pressure difference is another obvious sign of filter damage, which makes it vital to monitor and map the pressure difference level every day. When choosing a system, consider adding a broken bag sensor.

In addition to obvious abnormal conditions (such as fire or explosion), there are many factors that can damage the filter. Moisture and overheating can damage common filter bag fabrics, such as polyester or aramid, through a phenomenon called hydrolysis. This is a chemical reaction in which water reacts with the fibers of the filter bag, which may cause serious damage, and the filter bag loses dimensional stability and cannot collect dust. Other failure mechanisms include mechanical wear caused by abrasive dust, excessive pulsation, or damaged cages.

Filter dead zone

The most common reason you need to replace the filter is the dead zone of the filter. This means that the bag has reached the end of its useful life. It is already covered with dust, and regular cleaning cycles will not remove enough dust to allow it to handle the required airflow level.

The new filter has a relatively low pressure difference between the "clean" side and the "dirty" side. Over time, it will slowly accumulate. As the filter approaches its useful life, the pressure differential will increase faster. For guidance on properly starting the program after installing a new filter to maximize its life, please watch our dust collector or bag filter startup program video.

The service life of a filter depends on many factors, including the type of dust it handles, the moisture/chemical composition of the airflow, humidity, and operating conditions. Many dust collector purchasers fail to consider the frequency of filter replacement required when specifying the system. Before specifying the system itself and the filter, it is always recommended to consult a dust removal expert and share all available information about the application and site conditions, including temperature, humidity, and continuous operating time, as well as the type and number of dust collectors used with the dust media.

Incorrect filter or filter medium

The filter is selected based on cost, and there is no need to determine whether the filter medium is suitable for the application. Third-party filter bags of inappropriate size will not perform optimally. The filter media may not have the correct temperature or chemical grade for the application. If this is the case, the problem usually occurs quickly. Look for the dust emerging from the chimney or the readings of the collector particle monitoring system.

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