In thermal power plants, the combustion of coal generates a significant amount of ash as a byproduct. Efficient ash handling systems are crucial for the smooth operation of these plants, ensuring environmental compliance and operational efficiency. This article provides a comprehensive overview of how ash handling systems work in thermal power plants.
In thermal power plants, two main types of ash are produced:
An ash handling system typically consists of the following components:
– Fly ash is collected from the flue gas using electrostatic precipitators or bag filters.
– The collected ash is then transported to storage silos via pneumatic conveyors.
– Bottom ash is collected in water-filled hoppers located beneath the furnace.
– The ash is then removed using submerged scrapers or jet pumps.
– Fly ash is transported through pipelines using pressurized air.
– This method is efficient for long-distance transportation.
– Bottom ash is mixed with water to form a slurry.
– The slurry is pumped through pipelines to disposal areas.
– Ash is temporarily stored in silos equipped with dust suppression systems.
– This prevents ash from becoming airborne and causing environmental pollution.
– Ash is either disposed of in landfills or ash ponds.
– Alternatively, ash can be recycled for use in construction materials, such as cement and bricks.
Thermal power plants must adhere to strict environmental regulations regarding ash disposal. Key considerations include:
Ash handling systems are integral to the operation of thermal power plants, ensuring that ash byproducts are managed efficiently and sustainably. By understanding the components and processes involved, power plants can optimize their operations and reduce their environmental footprint.
