Through the process reform, the welding operation point is fixed on a certain worktable, or the weldment is operated in a straight line or a fixed area. In this way, advantageous conditions are created in this fixed position for providing a partial suction hood or for providing a movable partial suction hood within this line or area. Based on the process reform, a local ventilation dust removal device is provided for the welding operation. The local ventilation dust removal system consists of a vacuum hood, air duct, dust collector, fan, exhaust pipe and other components. a fixed partial dust collecting cover is arranged at the fixed welding place, and a movable dust collecting cover is arranged above or above the moving welding position, and the dusty flue gas generated by the welding operation is pumped into the cover in situ and in time, thereby The dust generated by the electric welding can be effectively controlled so as not to spread to the surroundings, so that the dust concentration in the air at the working place meets the requirements of the sanitary standard. The dust-laden air sucked into each dust collecting hood is collected by the air duct and sent to the dust collector for dust removal to meet the requirements of the discharge standard. The treated dust-containing air is discharged into the atmosphere through the fan and the exhaust pipe. The local ventilation and dust removal system is the key technology in the comprehensive dustproof technical measures. The design points of the main components are discussed separately below. The dust hood is a key component of the local ventilation system. The design should meet the following requirements: the airflow of the hood is evenly distributed, which can effectively capture the welding dust and save air volume; adapt to the process characteristics and not affect the operation; the airflow resistance is small. According to the increase of the distance in front of the hood and the rapid decrease of the wind speed, the hood should be as close as possible to the dust-producing point under the conditions of operation. The unit consists of a replaceable small vacuum hood, soft connecting tube, lightweight bracket, filter bag dust collector, fan, muffler and so on. A rotatable brush is provided inside the machine to regularly clean the dust adhering to the surface of the filter bag. The unit can be used for welding in fixed positions, and also for welding work where the solder joints are not fixed and move within a certain range. In order to make up for the moving dust hood sometimes fail to move part of the dust into the surrounding air as the welding gun moves, to prevent the dust from harming the operator, the welder must also be equipped with a dust mask. Therefore, for the design of its key technology ventilation and dust removal system, according to the applicable, effective and economical principles, more detailed ventilation design data is proposed. The ventilation and dust removal design has been applied in the grassroots units, which can make the dust concentration in the air of the workplace reach the hygienic standard or close to the requirements of sanitary standards. The dusty air introduced into the ventilation and dust removal system can be treated by the dust collector to meet the emission standards of China. Claim. This modern ceiling fan has LED module which has different color temperature can suit your request. Remote control make sure this ceiling fan can be easily control by the owner. Silent motor make no noise which make sure it be quite when it work. The place will look more modern when it has this modern ceiling fan. Modern Decorative Ceiling Fan,Ceiling Fan With Light,Ceiling Fan With Led,Ceiling Fan With Led Light ZHONGSHAN UFAN ELECTRIC APPLIANCE CO. LTD , https://www.uflightceilingfan.com