How to Select Filtration System for Industrial Air Cleaning

We are often contacted by organizations asking which cleaning equipment they should purchase.

They ask which information they need to provide us to ensure the most appropriate type and form of filter installation is selected:

This is the primary data required to select the type and shape of filter device – whether it will be a dry device, a wet one, or some other type.

On top of that, our questionnaire contains additional questions on dust which are somewhat uncommon but also affect the choice of equipment and have to do with special requirements for the equipment – whether the dust sticks to it or not, the natural slant angle of the dust, etc. to choose the type of dust detachment.

Abrasive dust affects the wear on the incoming gas current and filtered elements.

The flammability and explosion risk of dust affect grounding, electricity, and special equipment use requirements according to fire safety requirements.

The greater the detail you provide as to the nature of your contamination and its characteristics, the more proper the filtering solution that will be selected.

The equipment must be efficient and thrifty in all tasks that it is intended to accomplish. The technical tasks that the cleaning device is responsible for include:

1. Obstruction or collecting of contaminating substances

The filter elements are responsible for this task. There is a huge number of types and forms of them. Most widespread among the dry forms of filtration are baghouses and cartridge dust collectors, as well as absorbents. Among the wet worms are water and other liquids with various reagents.

Aside from the forms of the filtered elements themselves, also important is the size of the filter element, the shape, as well as its positioning within the equipment. In other words, equipment can be made to be similar in terms of its description, but different in terms of its shape and elements. For instance, if filter elements are to be placed very close to each other, the filter device will become stuffed with dust quicker and require technical maintenance and its filters will require replacement more often. Conversely, if the filters are placed a bit father apart (thus increasing the frame), there won't be any issues. The choice of the placement method of filter elements depends on the nature of the dust.

2. Collecting contaminated substances

A large amount of additional inclusions come into the gas pipes along with the air which require collection after they are caught. That is what the dust collector is for. It can come in different forms – as a conical hopper, as an extended hopper with a screw conveyor, a dust box, a big bag, a sack, and other accumulators.

In order that most of the contaminating substances land right into the dust collector, various dust separation methods are used, such as: contamination entry via a side gas entry, contamination entry via a dust chamber with a damper plate or a contamination entry into a space underneath the bag. These methods are used to direct most of the contaminant right into the dust collector and facilitate the work of the filter elements.

3. Discharge of the captured product

Discharge is divided up into the manual method and the automated method.

In the manual method, a manual hatch is opened, and when it is opened manually the dust is discharged from the dust collector into some volume or in the event that the volume (box) is connected directly to the filter, into which the dust falls.

Automated method: a gate or a double dump is used for the discharge, often along with a screw conveyor.

The difference between the manual and automated methods is the manual labor that has to be exerted to discharge the captured product. The automated method can be connected to a production chain and, for instance, the product can be returned right onto a conveyer.

The choice of a specific discharge method also depends on the amount of captured product and if the concentration is high, continuous discharging will be required. Conversely, if the concentration is low, the discharge will have to be down manually and periodically.

We hope that we've helped you to better understand the operating scheme of the filter device. Also, for your convenience, we've developed equipment catalogs that will help you decide on your device. You can download them below.

Get in touch with us and we will be happy to help!