The main advantages of drum boiler are: (1) Because there is a lot of water in the drum, it has a large heat storage capacity and can buffer the change of steam pressure caused by load change; (2) The drum boiler has a fixed dividing line between water, steam and superheated steam, so the temperature of superheated steam changes little when the load changes; (3) Because there is a steam cleaning device in the steam drum, the requirements for water quality are low. ...