Final answer:
Electrostatic precipitators are used to remove fly ash from bag filters by applying charges to airborne particles and attracting them to a filter. They are effective in both industrial and home settings.
Step-by-step explanation:
Electrostatic precipitators are used to remove fly ash from bag filters. They work by applying charges to the particles in the air and then attracting those charges to a filter, effectively removing them from the airstream. This process is achieved by passing the air through grids of opposite charge, where the first grid charges the particles and the second grid attracts and collects them. Large electrostatic precipitators are commonly used in industries to remove over 99% of the particles from stack gas emissions caused by the burning of coal and oil. They are also effective in home air cleaners, in conjunction with heating and air conditioning systems, to remove polluting particles, irritants, and allergens from the air.