TYPES OF BOILER

Main boiler : Used for the main propulsion. 

  

                                                              

Auxiliary boiler :Heating of heavy fuel oil.

Donkey boiler : used for supplying hot water to 

galley.  

                                                       

Tank boiler : A boiler with large water carrying   

capacity where the shell is being used as 

pressure vessel  most low pressure auxiliary

 boilers will come into this category.   

               

Vertical boiler : The shell is upright  and the

 furnace is within the shell at the lower half. 

Horizontal boiler : Boiler cylindrical shell lying 

across its length parallel to the ships structure.  

                                                                                                                                 

Exhaust gas boiler : operated by hot gas from

 engine or other exhaust gas.   

                                  

Drum boiler : water tube boilers employing 

steam and water drums.also known as bent tube

 type boilers. 

                                                                           
                                              

Package boiler : Fully automatic low capacity 

boilers packed inside a box type casing,capable 

 of quick steam production and flexible in 

positioning. This could be coil or fire tube type.