When reinforced concrete collapses amid the roar of machinery at demolition sites, the rising dust, like a beast breaking free, not only obscures visibility but also threatens the surrounding environment and the health of construction workers. As a powerful dust reduction tool, the ease of operation of the mobile fog cannon directly affects its dust reduction effect. Mastering the correct operation method enables this equipment to exert maximum efficiency at demolition sites, easily taming dust.
The preparation work before starting the mobile fog cannon is the basis for ensuring stable operation of the equipment. First, check the water source. The water source at demolition sites often comes from temporary water tanks or fire hydrants. It is necessary to confirm that the connected water pipes are not damaged, and the interfaces are locked with special clips to avoid leakage after water is turned on. If using a water tank for water supply, check the water quality in advance to avoid mixing with sediment or debris that may block the nozzles. A filter can be installed at the water inlet as double protection.
Second, check the power connection. Most mobile fog cannons use 380V industrial electricity. A professional electrician must confirm that the cable specifications are matched and the grounding device is firm and reliable. Especially in open-air demolition sites, check whether the cables are worn or aged. After rain, dry the plug before energizing to prevent short circuits. Finally, walk around the equipment to check the mechanical parts: whether there are foreign objects stuck in the fan impeller, whether the spray angle adjustment lever is flexible, and whether the tire pressure is sufficient to ensure stability during movement.
The two observations are to check the weather and the on-site environment. In case of thunderstorms or winds above level 6, operations must be suspended to prevent equipment damage or fog droplets being blown away, affecting the dust reduction effect. Observe the location of the demolition work point, and park the fog cannon 30-50 meters upwind in advance to ensure that the spray direction is consistent with the dust diffusion direction, so that the fog curtain can accurately intercept the rising dust.
After completing the preparation work, operating the mobile fog cannon only requires four simple steps, even for construction workers who are in contact with it for the first time. The first step is to start the equipment. Press the main power switch on the control panel. At this time, the indicator light is on, and the fan and water pump enter the standby state. Some models are equipped with remote controls, which can realize wireless operation within 50 meters, suitable for flexible control in complex terrain of demolition sites.
The second step is to adjust the spray angle. Rotate the pitch adjustment wheel on the top of the equipment to set the barrel angle between 15° and 60°. For vertical dust when demolishing houses, the angle can be adjusted to about 30° to make the fog droplets form an upward parabolic path, covering the dust cloud generated by building collapse. If dealing with dust raised by ground deposits, a 15° low-angle spray can form a ground fog curtain to prevent dust from spreading to the surrounding area.
The third step is to set the spray volume and wind speed. The knobs on the control panel can adjust the water pump pressure and fan speed respectively. When the dust concentration is high in the early stage of demolition, adjust the water pump pressure to the medium gear (3-5MPa) and the fan to the high-speed gear, so that a large number of 50-100 micron fog droplets can quickly suppress the dust. After the dust concentration decreases, switch to the low gear to maintain the dust reduction effect while saving water. Some intelligent models are equipped with dust sensors, which can automatically adjust parameters according to the dust concentration, reducing manual intervention.
The fourth step is to follow up the operation dynamically. During the demolition process, the mechanical arm keeps moving the work point, so it is necessary to arrange a special person to drive the mobile fog cannon to follow up synchronously. The universal wheels equipped with the equipment have brake devices. After moving to a new position, step on the brake to fix it to avoid the equipment sliding due to uneven ground. If there is a dead corner formed by the accumulation of construction waste, the fan can be temporarily turned off, and the water pump can be turned on alone to rinse the surface to prevent secondary dust.
After the demolition work is completed, a standardized shutdown process can effectively protect the equipment and reduce failures. First, turn off the function switch. First, turn off the water pump to stop the spray, and then turn off the fan after 30 seconds to avoid residual fog droplets condensing into water in the fan and damaging the motor. Then cut off the main power supply. When winding the cable, avoid excessive bending, and it can be hung on the hook on the side of the equipment to prevent crushing.
Three cleanups are essential: clean the water tank. If recycled water is used, it must be completely drained to prevent impurities from settling and blocking the pipeline; disassemble the nozzle assembly, rinse off the residual scale and dust with clean water, and pay special attention to dredging the small-diameter atomizing nozzles; clean the surface of the equipment, wipe off the attached dust and mud with a damp cloth to avoid long-term accumulation and corrosion of the shell.
Finally, perform daily maintenance: check whether the bolts at each connection part are loose, and add lubricating oil to the moving joints to ensure smooth adjustment during the next use. After demolition work in winter, the water in the water pipe must be completely drained to prevent the pipe from freezing and cracking. In northern regions, models with anti-freezing function can be selected, which protect the water system through electric heating devices.
In the battle against dust at demolition sites, the ease of operation of the mobile fog cannon is as important as its dust reduction effect. From careful inspection before startup to precise adjustment during operation, and standardized maintenance after shutdown, every step is responsible for dust control. Mastering these skills can not only keep the equipment in the best condition, control the dust concentration at the demolition site within national standards, but also reduce the impact of construction on surrounding residents, allowing the process of urban renewal to proceed steadily in fresh air.
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