In the production process of potassium hydroxide, it is necessary to heat up. In the production of potassium hydroxide, the liquid alkali must be evaporated, concentrated to a certain concentration, and then processed subsequently.
The traditional pot method directly uses fire to heat the alkali pot. The incineration of coal is incomplete. Ash and soot deposit exist in the furnace and the alkali-fixing pot. The heat transfer power is low. In order to save energy, three-pot method is usually used, that is, preheating pot, cooking pot and color matching pot.
Potassium hydroxide molten salt heating unit is a coal-fueled molten salt heating system, which is used to control the temperature of molten salt reaching the concentrator to meet the process requirements of high concentration units. The temperature of molten salt fueled with coal entering the furnace is 430 C, which is required for the concentrator. When molten salt is separated from high concentration unit, the temperature is 400 C. It flows into molten salt tank by gravity, and then the molten salt is transported by molten salt pump to circulate the whole molten salt system.
Potassium hydroxide enters the steam generator from the high temperature flue gas from the molten salt furnace, and then enters the water film dust collector after cooling by the air preheater. The flue gas enters the induced draft fan after dust removal and desulfurization, and the chimney is introduced by the induced draft fan and discharged to the atmosphere.