How to distinguish marine main boiler from marine auxiliary boiler?

Perhaps some customers do not know the difference between main and auxiliary boilers. Marine boilers are boilers installed on ships to supply steam (or hot water) for the purpose of promoting the steam power machinery of ships and satisfying the life needs of crew members. Marine boilers can be divided into main and auxiliary boilers according to their uses.

What are the uses and differences between marine main boilers and marine auxiliary boilers? The steam produced by marine main boilers is used to drive propellers and other auxiliary engines. The steam produced by marine auxiliary boilers is mainly for living needs, and sometimes for heating fuel oil, cargo oil and domestic water. At present, most of the marine boilers are marine auxiliary boilers, and the main boilers are mostly replaced by marine diesel engines and gas turbines.