In a system that uses compressed air, the filter that cleans the air is not very expensive. Even though it doesn't cost a lot compared to the whole system, it is still very important. The liver is an important organ in the body that gets rid of harmful things like toxins and drugs. It is like the body's own cleaner. Even though it is not as well-known as the brain or heart, it plays a big role in keeping us healthy. The filter cleans compressed air by removing harmful substances like water mist, oil mist, tiny dust particles and germs. This makes the air safe to use in machines, tools, production and even for people to breathe in medical settings.

When we need to clean air, we use a machine called a compressed air filter. But every different use of air requires different types of filters. So, how do we design the right filter for each use while keeping cost and technical factors in mind? We look at things like the material of the filter, how much of it we need, how fast the air should go through it, and what shape the filter should be in.

At the start, the decision about what material to use for filtering.

When air is squeezed, it has bad things in it. How clean the air needs to be depends on what it's being used for. As technology improves, there are many different kinds of filters with different strengths and special things about them. There's no filter that can remove all impurities, so when selecting a filter, we should think about two main things.

Rewrite this text in simple words: 1. Original Text: "The government has implemented a new policy to reduce carbon emissions and encourage the use of renewable energy sources." 2. Simplified Text: "The government has made a new rule to make less pollution and use more clean energy." The accuracy and effectiveness of the filter when used in real-life situations.

Different filter materials have different abilities to filter impurities, and their mechanical properties vary as well. Also, the efficiency of filtration for different objects varies greatly. Here are some materials that can filter impurities: - Powder metallurgy and ceramic filters work best for impurities that are 5μm or bigger. - Fiber filters are suitable for filtering impurities that are smaller than 5μm. They can remove 99% of the tiny impurities. When trying to filter oil mist, the fluffy fiber filter material and the glass fiber filter material used for other types of filtration won't work. This is because oil mist is usually smaller than 0.1 micrometers. Instead, a special type of glass fiber filter paper cartridge should be used. To make it work better, the cartridge is usually made by putting different types of filters in it in a special way.

2. Money and business.

If you don't need very clean compressed air, you don't have to use really good filter materials. If you pick this option, it can waste money and the filtering may not work well. When using filters that need to be very accurate in places that have a lot of dust, they can get blocked easily. This type of filter material is not recommended in technical terms.

Next, we need to figure out how much space the filter covers.

The filter area is the part of the filter material that stops air from going through it. When creating a filter, how fast it works is important. This helps to determine how big the filter should be.

The rule for figuring out how quickly the filter works is called the filter speed principle.

When figuring out how quickly fiber-like filter materials like filter paper can filter, we need to think about how fast they can move. How well a filter works and how fast it works are related. If you filter faster, the diffusion effect goes down and the impact effect goes up. The other effects don't matter much for filtration speed. When the thing being filtered is bigger than 0.3 micrometers, the way the filter moves is important. The filter needs to move faster than usual to work well. If you look at the formula, you can see that df and C0 are related. This means that the fiber diameter shouldn't be too big. When you want to filter really tiny particles (like oil mist), the way they stick to the filter is mostly due to diffusion. To make sure the filter works properly, the speed should be slower than C0. If you look at the formula and see that df and C0 are connected, it means that the fiber size should not be too tiny.

The fourth thing is the container for the filter.

The air filter needs to be strong enough to handle air that is pushed together tightly. It's usually shaped like a tube and has a filter part inside that is closed up tight in its cover. The filter can handle a lot of air pressure because it doesn't cause much pressure to build up on it. So, the container that holds the filter has to handle all the pressure. The shell is a part of the pressure vessel. To make it, you need to be qualified to make pressure vessels.

What the thing is made of on the outside. Metal materials are commonly used to make small filter pieces in a process called high-strength zinc-aluminum alloy die-casting. Large, high-flow filter pieces are usually made out of boiler steel plate welded together with strong pressure-bearing abilities. We can now create helpful things with stainless steel because of advancements in technology and changes in what people want. No matter what is used to make it, the finished shell needs to be checked to make sure it doesn't leak and can handle high water pressure.

Shell structure explained in simple words. As shown in Figure 2, there are two parts. The top part is called the "filter cover" and the bottom part is called the "filter cartridge." The filter cover has a place for air to come in and go out. It's the same size as the pipe outside. The filter part hangs on the cover. Look at Figure 7 on the right. Once the air is filtered, it can only come out of the cartridge through the exhaust port. When air is compressed to clean it, it can't have any holes where it can escape or it won't work.

The filter cartridge has two jobs. The first job is to make sure the compressed air flows in the right direction and stays inside the filter housing. The second job is to collect the filtered stuff like water and oil. To prevent dirt from building up, there is a way to drain it out of the bottom of the filter cartridge. The filter cartridge is wider than the filter element by two times, and it should also be longer by 1.25 to 1.5 times to keep the filter element above the filtered liquid.

Usually, the small pipelines have threads to connect the filter and external pipeline, while the bigger ones use flanges.

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