An Evaluation of the Misting Cannon and How It Works To Suppress Dust

In the olden days, sprinklers and hoses were used to suppress dust. The sprinkler is ordinarily used for irrigation while the hose is used for suppression of fire. Although these tools were designed for other uses, they worked well in suppressing dust due to one reason, that they were intended to provide maximum flow of water. However, these two also present some problems, one being that water is a scarce resource and so any effective system of suppressing dust must use little or not water.

As the world continues to industrialize, the problem of dust is becoming much more complex and this has necessitated the development of new methods of dealing with the problem, one of them being the misting cannon. So, how does it work? Here below are some important tips –

 

Airborne can only be suppressed by small size water droplets:

In order to capture airborne, the water droplets must be of a size equivalent to that of the dust. Two important factors determine the size of the droplet namely the nozzle and the pressure. In order to ensure they produce the finest droplets or particles of water, the dust suppression system must atomize the dust control solution. The water should be pumped at high pressure at the right nozzle (in terms of size and shape). The atomized mist technology involves the use of special atomizing nozzles which fracture the water stream in to very fine droplets.

 

Atomization is important as it determines the size of the water droplet used to capture the fugitive dust particles in the air. A water droplet larger than dust particle will cause the fugitive dust particle to follow airstream around that drop. If the water dust particle and water droplet diameters are almost equal, there is likely to be collision between the two, and that will bring down the dust particle, effectively suppressing it. For effective suppression, the atomized mist particles should range between 50 and 200 microns.

 

 

 

Fog systems also work but have their limitations:

 

There is another dust suppression system known as fog systems. The fog systems can generate water droplets of even smaller size than that produced by misting cannon and may be ideal in some situations. The fog systems may create moisture in the air above the area where dust is produced. The moisture will capture the dust particles when they become airborne.

 

The limitation in fog systems is that they are expensive and costly to maintain in that they need compressed air, distilled water and highly controlled conditions. In most cases, fog systems will only arrest the dust particles but cannot control the dust produced on the surface. The atomized mist does both; it arrests the airborne dust particles at the same time wets the source of dust, preventing the dust from getting airborne in the first place.

 

Use of too much water in suppressing dust is costly and create other problems:

 

Use of water in suppressing dust has its own limitations and problems. For example, in the deserts or during summer season when the sun’s temperature are too high, water dries up fast and it may not be economical to pour it on the surface. Additionally, too much water can over wet the surface and cause soil erosion. These are the two factors that have made misting cannon the most preferred method over fog systems and sprinkles and hoses.

 

In the olden days, sprinklers and hoses were used to suppress dust. The sprinkler is ordinarily used for irrigation while the hose is used for suppression of fire. Although these tools were designed for other uses, they worked well in suppressing dust due to one reason, that they were intended to provide maximum flow of water. However, these two also present some problems, one being that water is a scarce resource and so any effective system of suppressing dust must use little or not water.

 

As the world continues to industrialize, the problem of dust is becoming much more complex and this has necessitated the development of new methods of dealing with the problem, one of them being the misting cannon. So, how does it work? Here below are some important tips –

 

Airborne can only be suppressed by small size water droplets:

 

In order to capture airborne, the water droplets must be of a size equivalent to that of the dust. Two important factors determine the size of the droplet namely the nozzle and the pressure. In order to ensure they produce the finest droplets or particles of water, the dust suppression system must atomize the dust control solution. The water should be pumped at high pressure at the right nozzle (in terms of size and shape). The atomized mist technology involves the use of special atomizing nozzles which fracture the water stream in to very fine droplets.

 

Atomization is important as it determines the size of the water droplet used to capture the fugitive dust particles in the air. A water droplet larger than dust particle will cause the fugitive dust particle to follow airstream around that drop. If the water dust particle and water droplet diameters are almost equal, there is likely to be collision between the two, and that will bring down the dust particle, effectively suppressing it. For effective suppression, the atomized mist particles should range between 50 and 200 microns.

 

 

 

Fog systems also work but have their limitations:

 

There is another dust suppression system known as fog systems. The fog systems can generate water droplets of even smaller size than that produced by misting cannon and may be ideal in some situations. The fog systems may create moisture in the air above the area where dust is produced. The moisture will capture the dust particles when they become airborne.

 

The limitation in fog systems is that they are expensive and costly to maintain in that they need compressed air, distilled water and highly controlled conditions. In most cases, fog systems will only arrest the dust particles but cannot control the dust produced on the surface. The atomized mist does both; it arrests the airborne dust particles at the same time wets the source of dust, preventing the dust from getting airborne in the first place.

 

Use of too much water in suppressing dust is costly and create other problems:

 

Use of water in suppressing dust has its own limitations and problems. For example, in the deserts or during summer season when the sun’s temperature are too high, water dries up fast and it may not be economical to pour it on the surface. Additionally, too much water can over wet the surface and cause soil erosion. These are the two factors that have made misting cannon the most preferred method over fog systems and sprinkles and hoses.