The utility model relates to boiler construction and is designed to improve the efficiency of a boiler plant using heavy fuels as fuel. It can be used in the design and manufacture of boilers, including ship boilers.;The boiler plant includes a boiler with a flue to which a gas analyzer is connected, as well as a boiler fuel system containing a series-connected fuel type switch, a fuel pump, a coarse filter, a fuel heater, a fine filter, as well as an oil residual tank and a service tank, with one the input of the fuel type switch is connected to the service tank, and the other to the oil residue tank, in addition, it contains a series-connected fresh water tank, a pump, an adjustable valve and a water heater, and the boiler contains a two-channel nozzle, the first channel of which is connected to the output of the fine filter, and also a water superheater, the inlet of which is connected to the outlet of the water heater, and the outlet is connected to the second inlet of the two-channel nozzle.
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