Dust Collectors - Working & Maintenance

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Dust Collectors - Working & Maintenance


Dust Collectors

Dust collector is a device that is used to collect dust via an inlet, filter the dust particles through filter arrangements and then the filtered air is let into the atmosphere through ventilations. Dust Control is must for any kind of industrial processing to safeguard working labors and machineries from hazardous dust. Dust collection system are most widely used to provide a clean work environment so as to protect the employee from harmful and hazardous fumes. Indoor dust particles are more harmful when compared to outdoor dusts. Continuous exposure to fine particles can also affect lung function and worsen medical conditions such as asthma and heart disease. So these dusts must be efficiently captured before it is inhaled by the workers. The health hazards caused by the dust particles depends on the size, type and composition of dust. Very fine dust particles are much more hazardous and can cause adverse effects on the inhaler. Hence fine dust collection systems must be used to collect the coarse dust particles. Industrial dust collectors must be used in large industries and health hazard is a major factor where several employees work. Dust Collecting system can be used in any industries where micron sized dust particles are produced

Working and Maintenance

If there is no adequate airflow at a collection hood, then that is because there is dust everywhere. However, a collection hood can be designed and located to deliver too much airflow or suction, resulting in heavier than desired dust loading into the dust collector system. To design an efficient collection hood, capture velocity and duct velocity must be understood. Duct velocity is the speed of the air once in the ductwork. The duct velocity must be equal to or slightly greater than the minimum air velocity required to move dust particles in the air stream in order to move the air and dust particulate to the dust collector. Capture velocity is the speed of the air at any point in front of the hood or at the hood opening necessary to overcome opposing air currents and to capture the dust laden air at that point. The collection hood must generate a flow pattern and capture velocity sufficient to control dusting without collecting excessive dust. If the capture velocity is too high at the collection hood, excessive particulate will be introduced into the hood, ductwork and eventually to the dust collector. Inside the dust collector the filters will be subjected to heavier than designed dust loading. By correcting the poorly designed and located hoods you will improve the dust collector system by reducing the grain loading. Blast gates need to be installed to achieve system balance. Due to changing airflows through the system, adjustments are needed to ensure proper capture velocity at each hood.