a furnace for burning the waste material (mazut) produced during petroleum refining; used in boiler units of any steam capacity. The furnace chamber is usually constructed in the shape of a vertical parallelepiped. Nozzles are used to atomize the mazut, since only the gaseous phase enters into the reaction during the combustion of liquid fuel. The nozzles are arranged along the walls or in the corners of the furnace. Air is supplied through ports positioned around the nozzles. In large furnaces the air is heated to 200°-400°C, thereby accelerating the evaporation of fuel. Furnace shields are manufactured from smooth or finned pipes 32-76 mm in diameter, and the chamber is fully shielded in most cases. Mazut furnaces are designed to have the same parameters as gas furnaces. Dense deposits (skins) form along the pipes of the shields and steam superheaters during the combustion of mazut, reducing the heat transfer coefficient, which subsequently brings about an increase in the temperature of waste gases and a decrease in efficiency. To eliminate such skins, special additives are blended into the mazut, making the deposits brittle and easily removable by blowing.
R. G. ZAKH