During operation, road shot blasting machines generate a large amount of dust due to abrasion caused by shot blasting, rust on the workpiece surface, and the shedding of impurities such as scale. Therefore, a dust collector must be used with the machine to purify the air. What size dust collector should be used for road shot blasting? To achieve effective dust removal, a properly designed dust collector must be able to immediately absorb generated dust, achieving environmental protection while also creating negative pressure to prevent dust from escaping.
The dust collector's dust removal mechanism is to cause the dust-laden airflow to rotate. Centrifugal force separates dust particles from the airflow and traps them on the walls of the device. Gravity then causes the dust particles to fall into the hopper. Multiple cyclones and multiple settling cycles occur. Under normal operating conditions, the centrifugal force acting on the particles is 5 to 2500 times that of gravity. Therefore, a multi-cyclone dust collector is significantly more efficient than a gravity settling chamber. It is generally used to remove particles larger than 0.3μm. Generally, dust-laden air enters the LLT dust collector through the bottom inlet of the side compartment. Due to gravity, part of the dust settles into the ash bin and then falls upward into the filter element. The dust is then blocked on the outer surface of the filter element and enters the clean air chamber through the filter center and is discharged through the exhaust pipe. The cyclone dust collector is constructed of special metal or ceramic materials that are resistant to high temperature, abrasion and corrosion. It can operate at temperatures up to 1000°C and pressures up to 500×105Pa. From technical and economic perspectives, the pressure loss control range of the cyclone dust collector is generally 500 to 2000Pa. The filter is automatically and discontinuously cleaned, that is, only one group (2) of filters is offline cleaned at any given time. During the dust removal process, the pulse controller connects the power supply of the electromagnetic pulse valve, causing the corresponding membrane valve to eject pulsed high-pressure air. The high-pressure air then passes through the filter element from the inside to the outside, removing the dust attached to the outer surface of the filter element. The dust particles fall into the dust hopper and enter the dust removal bucket. The lower the compressed air pressure setting, the lower the air consumption of the pulse valve. The pulse jet controller can generally be adjusted to clear one filter column every two minutes, that is, one pulse valve is connected every two minutes to increase the dust removal energy and increase the compressed air pressure.
