The Ventilation and Dust Removal System of the Sand Blasting Room

After the sand blasting room works, the air in it needs to be purified to be discharged into the atmosphere. There are many types of dust removal systems for sandblasting room ventilation. The common ones are the cyclone dust collector and the bag dust collectors are available.

The cyclone dust collector for sandblasting room ventilation

Cyclone dust collector: The cyclone dust collector has a long history and it is the oldest one in the family of the dust collector. The cyclone dust collector has no moving parts or any element that requires more ring-shaped filter. The maintenance of it is low and the running cost is also low. It uses the centrifugal force to separate the dust particles from the dusty air. The dust collector can be used as a pre-separation device for high-efficiency dust collectors to separate the large particles of dust from the air. The cyclone dust collectors are divided into single-cylinder and multi-cylinder. The multi-cylinder cyclone dust collector is a combination of several single-cylinder dust collectors, which doubles the processing capacity. As for the single-cylinder cyclone, the smallest diameter of it can be 150mm and the largest diameter of it can be 3300. The multi-cylinder cyclone can be composed of up to 8 single-cylinder dust collectors.

The dust removal efficiency of the cyclone dust collector is higher than 80%, which is not high, and the separation effect to fine particles is not ideal. It is not used very commonly in the sandblasting industry. However, if the ventilation of the sandblasting room is enough, the impurities on the surface of the workpiece are not many, and the quality of the abrasive is good and the cleaning is relatively clean, to use of a cyclone dust collector to purify the air can also meet environmental protection requirements. After all, the cyclone dust collector has advantages that other dust collectors do not have.

The dust removal efficiency of the cyclone dust collector is closely related to the wind speed in the inlet. If the wind speed is high and the dust removal efficiency will be high. When the wind speed is low, the dust removal efficiency is low. The commonly applied wind speed in the inlet is between 18-22m / s.

The bag dust collector in the ventilation of the sandblasting room

The bag dust collector: It is the earliest dust collector using fiber fabric as filter material. It has a history of decades since its introduction. The dust removal efficiency of the bag filter is much higher than that of the cyclone dust collector, which can reach more than 99%, and it also has a good separation effect for fine particles of dust. Therefore, bag dust removal plays an important role in air purification and environmental protection. It is the main dust-containing air purification device in the blast cleaning industry, which can meet the requirements for ventilation and dust removal in blast cleaning. In the sand blasting and shot blasting procedure, the box type bag dust collector can meet the air essence requirements of most of the blasting rooms and is the preferred dust removal device for ventilation and dust removal in the blasting room.