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Manufacturing Technology Insights | Thursday, June 22, 2023
A quick grounding in the six E’s of effective air filtration can help managers save time and money and avoid costly mistakes.
FREMONT, CA: In manufacturing operations, air filtration is sometimes disregarded. Even though air filtration has a significant impact on production effectiveness, efficiency, and safety, many find it intimidating. It doesn't have to be that way, though. Managers can save time and money by learning the six E's of effective air filtration and avoiding costly mistakes. Frequently, an air filtering assessment begins with minimising contaminants' exposure and stops when that box is checked, with little consideration given to best practices or system performance. Exposures are a good place to start when designing an air filtration system, but it's only the first step to implementing a system that will provide many years of dependable service.
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The Six E's of Effective Air Filtration
1. Exposure: The material in question determines the level of exposure. Various types of dust and mist have different exposure limits and measurement methodologies, whether it's steel, wood, plastics, composites, or food goods. Working with a vendor who understands the regulatory standards as well as the demand for demonstrable performance is critical. Given the rise of lawsuits involving Welder's Condition (a neurological disease related to Parkinson's Disease), demonstrating a commitment to worker safety is more crucial than ever. Particulate exposure must be closely monitored while working with certain materials, such as stainless steel. Only a few items on the market can reach the upcoming manganese restriction of 0.02 mg/cu m, which the industry must adhere to manually weld stainless steel. Other elements, such as wood dust, can induce asthma, hypersensitivity pneumonitis, and chronic bronchitis, among other respiratory problems. Mist treatments can also cause odour and microbiological problems. The expectations of workers frequently surpass those of OSHA or other agencies. Employees are more aware of health concerns than ever before, which means the workplace is being investigated more closely. Failure to exceed workers' expectations for exposure levels may result in more attrition and, ultimately, higher expenses.
2. Explosive and Flammable Dust: Certain specks of dust or mists might be explosive or flammable depending on the composition. Each application must be examined separately. Some criteria are dictated by insurance obligations, while others are governed by regulations. Experts in explosion applications can evaluate projects using the NFPA 652, 654, 664, 484, and 61 standards. Wood, metal types, food products, and other sorts of particles have different requirements. No-return valves, abort gates, explosive vents, and other devices may be required by industry specialists.
3. Efficiency: In air filtration systems, filter effectiveness is usually the only factor that uneducated purchasers consider. Filter efficiency refers to the filter's ability to restrict particle flow rather than its energy consumption. Filter efficiency is measured as a percentage of particle that is prevented from passing through the filter, based on particulate size. A filter may, for example, prevent 99 per cent of particles at 3 microns but only 30% at 0.5 microns. Tiny holes obstruct the passage of smaller particles. As a result, the filter efficiency should be determined by the type of dust collection and the size of the particles present. Welding smoke, grinding dust, wood dust, and aluminium polishing all have varied particle sizes and thus efficiency requirements.
4. Evacuation: The emphasis and end goal of any filtration project is always particle evacuation. The methods used will vary depending on the application, but they will usually fall into one of two categories:
• Capture solutions for sources
• Alternatives to the environment
5. Emissions: The maximum authorised amounts that can be exhausted to the outside or restored into the building are known as permissible emissions requirements. Emission levels show the quality of the air leaving the collector, which can contain a variety of contaminants in various volumes and types, including gases, vapours, and particulates.
6. Energy: Energy efficiency is often neglected when it comes to dust collection, yet it has the greatest impact on the producer. A well-built system can reduce the collecting system's operational expenses by up to 85 per cent.
When considering an air filtering system in an industrial environment, all six of these characteristics are critical. Fortunately for operations managers, each one represents an opportunity to improve productivity, reduce costs, save money, and promote safer working conditions.
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