In many industrial plants, boilers are equipment that generally generate polluting particles or gases. These can affect both the environment and worker safety. This is precisely why bag filters play an extremely important role.

In order to reduce the negative effects of particles and pollutants, installing a bag filter in boilers represents an excellent alternative for the industry. This device, when installed in boilers, has the function of controlling particulate emissions, separating the particles present in the flow of industrial gases.

In view of this, we invite you to understand what a bag filter is, as well as the advantages that encourage its adoption by different industrial plants.

Why should you install a bag filter in your boilers?

By definition, every bag filter is known as a device consisting of a bag-type filter element designed to filter gases and particulates, normally installed in industrial processes that generate dry particulate pollutants, such as boilers.

In boilers, the bag filter is associated with an exhaust fan and ducts. These form a system that aims to remove the contaminated air generated, separating the particulate matter using bags in special fabrics that help filter the gases.

Thus, the function of this device is to separate solid particles from effluent gases, allowing the recovery of the solid part resulting from the burning of fuel and purification of gases by removing pollutants.

Therefore, by integrating a bag filter into boilers, it is not only possible to filter, but also eliminate particles from gases resulting from combustion, which is a basic and very beneficial measure in ensuring safety and controlling the pollution generated.

Types of bag filter

The bag filter is characterized as a device that can be round or cycloned, which are more efficient when compared to rectangular filters, since a pre-separation of the larger dust particles is carried out and the smaller particles are retained in the bags.

The rectangular or square filter has a simpler construction design than the cyclone, but the principle related to filtration is different, causing all the material collected in the filter to reach the bags.

Therefore, we need to understand that for each material that will be filtered, the most suitable bag filter must be carefully analyzed. In addition, the characteristics of the product and the emissions requirements of regional environmental agencies mean that the project requires a filter with a greater dust retention capacity than another.

Main advantages of adopting the bag filter

In a bag filter, filtration begins when the gas loaded with particles passes through the filter element(s). As a result, the particles are retained on the surface of the fabric and in the pores of the fibers, forming a residue known as filter cake, which will be removed from the bag once the predetermined maximum pressure is reached.

With this approach, there will be many advantages that every industry will have when investing in a bag filter in its boilers, but certainly the most important of these is the ability to reduce the emission of pollutants into the atmosphere.

Furthermore, as this is a very versatile and customizable device, the bag filter can be used by all types of industries, reducing costs with the post-treatment of particulate material, as the process results in dry waste.

Thus, the installation of a bag filter allows obtaining important economic and technical advantages, such as:

• Cost reduction;
• Meeting future requirements from environmental agencies, which tend to become increasingly restrictive;
• Increased particulate filtration efficiency;
• Elimination of secondary effluents;

The only disadvantage of this device is associated with the high maintenance and operating costs of the equipment. Therefore, maximum efficiency in the use of the bag filter depends on the work of a team that knows how to operate and carry out preventive maintenance on this equipment.

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