Mist Collector

What is a mist collector?

The mist collector is a machine that is able to collect mist from the oil-based as well as the water-based coolants that are used in machining operations. This type of machine is widely used industrially in the machining factories or production line. They are similar to the industrial air purifiers except that the mist collectors filter out the oil mist, smoke, machining dust, grinding particulates and fumes.

The industrial mist or fumes refer specifically to the aerosols that are made of dust, liquid, and sticky particulates. The mist collectors are better known as the oil mist collectors. There are different types of the mist collectors; there are compact mist collectors that are mounted directly to the machines, there are ceiling-mounted models and there are floor-mounted collectors as well to fit into different environments. Generally speaking, the mist collectors are commonly seen in the environments of CNC lathe machining settings because they are useful to filter out the dust and mist to which the grinding, milling or other types of lathe machining operations are involved.

Why is the mist collector important?

The industrial mist is a compound of industrial liquids, dust, and particulates. The industrial liquids can be water vapors, lubricants, and oils that are generated or released from the metalworking machineries. When these industrial liquids spread into the air, they capture the dust and particulates easily and make them into aerosols. These kinds of substances, if not well collected and evacuated, will spread throughout the working environment and attach to the walls, ceilings, floors, and machines. These substances are so greasy and gluey that when they cover on the floor, it becomes slippery and can be dangerous for the working staff in the environment.

Also, when the mist covers on the machines, it can compromise the precision and accuracy of the operation; it can even result in malfunction of the machinery to some extent. To make sure the staff members have a safe working environment as well as to guarantee the efficiency and function of the equipment, the application of the mist collectors is quite substantial.

How does the mist collector work?

The anatomy of a mist collector is similar to that of an air purifier. Typically, the most common mist collectors that people can find are the console-styled device which is mounted to the floor against a wall or the ceiling-mounted models that look like the AC. 

Inside the mist collector, the most important component is the filters. The filters are the media which works as the barrier in the way of the air flow path. All the substances in the air are going to be separated from the air when it flows through the filters. A good quality mist collector is expected to filter out at least 95 percent of the substances in the air. Some models can reach the true HEPA level of over 99.5 percent of filtration efficiency. HEPA stands for high efficiency particulate air and the HEPA level of filtration refers to the filtration efficiency to which at least 99.5 percent of the particulates in the size of around 0.3 microns are filtered out.

Three types of mist collectors

There are three main types of mist collectors; each of them has their own features and the mechanism they apply to collect the particulates is different. They are centrifugal mist collectors, cartridge mist collectors and electrostatic precipitator mist collectors.

The centrifugal mist collector has the collecting system that revolves around the rotating filter which combines the small droplets of mist to the bigger droplets. The centrifugal force makes the droplets to stay on the wall of the machine and drain out from it until there is only pure air in the cavity.

The mechanism of the cartridge mist collector is rather simple. It includes HEPA filters to capture the industrial smoke with oily substances when the air flow passes the filters. The maintenance of this type of machine is also easy: just replace the HEPA filters regularly and that is pretty much all about it.

The electrostatic precipitator mist collectors apply high voltage currents to gather the particulate matters and industrial liquids in the air. It works by giving the particulates positive charges and when they pass through plates with negative charges, they are trapped and hence filtered out from the air.

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