The hot water boiler KVr ​​0.7 Gcal is distinguished by high efficiency, which is achieved through the use of the following design solutions. The large volume of the combustion chamber ensures complete combustion of fuel, thereby reducing losses with mechanical underburning. Gas-tight design of the furnace and high-quality thermal insulation reduce heat losses through the walls of the boiler and the environment and exclude the suction of cold air into the boiler furnace. The developed convective heating surface ensures a decrease in the temperature of flue gases from the boiler to 200-180 ° C. The use of modern technology of fuel combustion in the bed reduces losses with mechanical and chemical underburning of fuel. The hydraulic circuit in a hot water solid fuel boiler for long burning works according to the counterflow circuit and the convective package acts as an economizer. Numerous partitions installed in the boiler headers direct the coolant flow, excluding the occurrence of stagnant zones and local overheating of heating surfaces, high speeds and turbulization of the water flow minimize the formation of scale, steel boilers operate reliably without special measures for chemical water treatment. Technical characteristics of the KVr 0.7 hot water boiler Boiler power, Gcal / h (MW) 0.6 (0.7) Heated area with a ceiling height of 3 m, m² 6000 < / td> Fuel, coal Kuznetskiy D Kharanorskiy B1 Lower heat combustion 5230 2720 Boiler efficiency, not less,% 82 73 Fuel consumption, kg / h 144 302 Equivalent fuel consumption, kg / h 108 Exhaust gas temperature, ° C 200 Consumption of working medium, m³ / h 24 Water temperature, ° C 70-95 Working medium pressure, MPa (kgf / cm² ) 0.3-0.7 (3-6) Boiler hydraulic resistance at a temperature difference of 25 ° C, MPa (kgf / cm²), no more than 0.07 (0.7) Aerodynamic resistance, Pa (mm.water .st.), Combustion mirror area, m2 no more than 300 Combustion device grate Overall dimensions of the boiler block with a firebox, no more Length, mm 2300 Width, mm 1450 Height, mm 1800