A dust extractor is used in many different processes to either recover granular solid from a system or to remove solid pollutants from the exhaust before letting them out in the environment. Collection of dust is an online process from usually another machine that happens continuously. A dust extractor can be of a unit construction or it can also be made up of many devices that work collectively to filter the air. They are basically a type of air pollution control equipment so that they can help in improving the overall air quality. There are basically five distinct types of extractors that are mentioned below.
- Inertial separators
- Fabric filters
- Wet Scrubbers
- Unit Collectors
- Electrostatic precipitators
All of the above-mentioned extractors work quite distinctly in epoxy flooring and they vary widely with respect to their designs, effectiveness, construction, operation, space needs, and the cost of maintenance. Each of them also has its own pros and cons. Therefore, while selecting, certain factors must be kept in mind that can help with a proper selection of a dust extractor.
- The particle size and dust deposition – This aspect is one of the most important to keep in mind while selecting a device. For example, in a mineral processing operation, a dust concentration of 0.32 gm per cubic foot of air and particle size from 0.5 to 100 micrometer in diameter can be expected. Therefore, a suitable dust extractor should be chosen accordingly.
- Amount of dust collection that is needed – While selecting an extractor, its efficiency must be known so that a high-efficiency system can help in removing more dust from an area. That can also help in determining whether an application needs costly devices like an electrostatic precipitator or a piece of average equipment like a wet scrubber or a baghouse.
- Airstream characteristic should also be taken into account – The airstream characteristic can be a major factor while deciding a dust extractor. For instance, cotton fabric filters will not be useful at places where the temperature is more than 82 degrees Celsius. Steam condensation at such places can blind the bags.
- Dust characteristic is important to consider– If there is a heavy concentration of dust like that from mineral ores or silica, it can be very abrasive for dry centrifugal extractors. Similarly, there are some types of dust particles that may not be suitable for fabric collectors. In the same way, while using an electrostatic precipitator, many types of inflammable materials should not be used as they can be combustible and a mishap can occur.
- The disposal technique is very important – The dust disposal technique can vary considerably with the type of extractor, material, volume, and a particular factory process. An extractor can work continuously or it can unload in batches. Wet extractors can be more suitable to handle issues related to secondary dust problem during the disposal process. Therefore, this factor must also be considered while deciding an extractor.
By adhering to these rules, one can easily select the best extractor that can solve a purpose satisfactorily. Keeping these points in mind can be very effective in deciding on the machine.