Firetube Boiler Technology

1. The Furnace In a firetube boiler, the combustion takes place in the furnace. This furnace, usually cylindrical, can either be covered with refractory material like ceramic (dryback furnace) or be in contact with the boiler’s water (wetback furnace) which significantly increases the heat-exchange surface. The end of the furnace is called the reversal chamber…

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