Coal-fired boiler

gas lava stove

Structural schematic diagram of horizontal chain molten salt furnace

Technical parameters of molten salt furnace

Coal-fired molten salt furnace

       The molten salt furnace is a special industrial furnace that uses molten salt as the heat carrier, and the high-temperature molten salt is transported to the heating equipment through the forced liquid phase circulation of the molten salt pump, and then returns to the heating furnace for reheating. The molten salt furnace system is mainly composed of a molten salt circulation system, a combustion system, and an electrical control system. Its main equipment includes furnace body, burner, molten salt pump, molten salt tank, electrical control cabinet and other auxiliary equipment.

 Furnace body, molten salt pump, molten salt tank and related delivery pipelines, valves, etc. constitute molten salt furnace circulation system, furnace body, burner, flue gas duct, etc. constitute molten salt furnace combustion system, electrical control cabinet and related temperature measuring components Electric control system of molten salt furnace.

 Molten salt is composed of potassium nitrate (KNO ₃ ), sodium nitrite (NaN0 ₂ ) and sodium nitrate (NaN0 _{3 ), the formula is:}

 KNO ₃    53wt% ； NaN0 ₂   40wt% ； NaN0 ₃   7wt%

 The melting point of the above-mentioned mixed salt is 142°C, and the melting heat is 18kcal/kg. The molten salt heat carrier is heated above this temperature for use, and the use temperature of the molten salt reaches 350~450°C. When the molten salt furnace stops running, the molten salt should be discharged into the molten salt tank. .

 The powdered salt is put into the molten salt tank, heated and melted by the high-pressure steam pipe installed in the tank, until the viscosity of the molten salt in the tank can be circulated by a circulation pump, so that the whole system becomes a flowable and circulatory state, and then sent to Go to the heating furnace to further cycle the temperature to reach the temperature that can be used.

 There are two methods of melting salt, one is to heat and melt the powdered inorganic salt; the other is to add water to the inorganic salt to form an aqueous solution, and the heating is accompanied by the evaporation of water to melt the salt. The latter is easy to cause cavitation erosion of the circulating pump due to the generation of water vapor, making the operation difficult. Regardless of the method used, the salt melting operation only needs to be performed once at the beginning of the entire operation.