The misting canon has five main components: heat exchanger, the pressure pump, fog machine fluid, remote control, and the nozzle. The fog fluid stored in a tank is forced by the pressure pump through the heat exchanger and heats up to 400⁰F. The fog fluid vaporizes at this temperature and is emitted to the atmosphere through the nozzle. This is what we normally see as the fog once the vapor contacts a cool atmosphere.
This is basically a piston pump that conveys the fog juice from its tank to heat exchanger. It normally produces some sounds during the operation.
The heat exchanger
It is a metal block that consists of an inbuilt heating element and a thermostat to regulate temperatures. It heats the fog juice which is expelled via the nozzle. Different fog machines have different wattage ratings ranging from 400W to 1300W. A model with a high ‘Watts’ produces more fog and its heat exchanger is more powerful hence it goes through the re-heat cycle less frequently.
It is normally made of brass and contains a small opening which emits a vapor that is pumped at a high pressure. It becomes extremely hot and no one should touch it or place a flammable substance near it.
Modern misting systems are controlled remotely with a single button and so their operations are very simple. To release the fog, the button is held down and to stop the fog, the button is released. A timer remote control is even a better option because the operator can control the timing, duration, and the amount of fog released.
Most of today’s fog machine fluids are water-based. The fluid is a mixture of water and glycol but there is always a recommended brand for every fog machine. Every type of fluid is designed for a particular fog machine. If these instructions are neglected, adverse outcomes can cause damage to the fog machine, poor emission, or hazardous chemical emissions.
Fog cannon and dust suppression
Dust is usually a major problem when it comes to earthworks, heavy material transportation, or dumping. The misting cannon technology is a solution to dust haze risks such as blinding of site workers and lung complications. These systems help to create conducive and healthy working atmospheres. To suppress dust, the canon attaches water to the suspended dust particles thereby increasing their weight so that they fall to the ground. Water-based cannons are advantageous in that they don’t pose any danger to the workers and the supply is quite easy. The other benefit of using water to suppress dust is that no chemicals are emitted into the environment. Basically, water is pumped through the nozzle and comes out in form of a mist which is scattered by a fan across a large area.