What happens the ash in a thermal power station?
There are two ash byproducts in a thermal power station. These are bottom ash and fly ash. Bottom ash as the name implies falls to the bottom of the boiler (incinerator) during combustion. This is transported when cool by means of conveyors or pipes to a collection area. This product is usually quite (relatively) valuable. It is often used in the construction industry as an aggregate in concrete. Fly ash is collected from the smoke that is discharged in the chimney. Electrostatic precipitators ionize the ash particles and they are collected on plates. The ash is then deposited and stored in silos or piled as a waste in fields near the power plant. There are many studies underway to find uses for this product. A third product collected is from the desulpherization of smoke. There are a number of products of this process depending on the method.of cleaning. One popular approach is using a limestone wash on the smoke This results in the production of gypsum. The main ingredient in wall bo
