what is the meaning of second hand boiler or what are the all types of boilers?
Well,second hand means not new or used. a Boiler is a container used to boil water or any liquid. You can use an element that is heated by means of electricity or you can make a fire under the boiler to heat it. so the geyser you get your hotwater from in your house come from a electrical power boiler that is inside a insolated sealed housing to prevent heat loss. On coal fire power stations they make use of coal to super heat the boiler in order to produce steam to drive the turbines.
