Scale is one of the most harmful sources of cast iron industrial hot water boilerheating system. Therefore, in order to ensure the safe and economical operation of cast iron hot water boiler, it is necessary to remove boiler scale in time. To give you a brief description of three commonly used and effective boiler scale removal methods: mechanical scale removal method, acid washing scale removal method and alkali cooking scale removal method. 1, alkali cooking scale removal method: alkali cooking scale removal method, its effect is worse than the acid washing scale removal method, but after alkali cooking due to water scale loose, Therefore, the scale which is difficult to remove with hydrochloric acid can also be treated once before pickling. The alkali cooking method is simple to operate, and the side effect is relatively small. The disadvantage is that the cooking time is longer, the medicament consumption is more, and the effect is poor.
2. Mechanical scale removal: when the cast ironindustrial hot water boiler heating systemhas loose scale and slag in the furnace, the cast iron hot water boiler is cooled after stopping the furnace, and the furnace water is released. After washing with clean water, the scale can be descaled with flat shovel, steel wire brush and motor tube mill. This method is relatively simple and is often used in small cast iron hot water boilers with simple scaling. However, high labor intensity, poor scale removal effect, easy to damage the boiler body.
3, acid washing scale removal method: most of the acid washing scale removal method is hydrochloric acid or nitric acid to clean. The pickling solution is composed of hydrochloric acid plus corrosion inhibitor or nitric acid plus inhibitor. This kind of pickling solution can not only remove the scale in industrial hot water boiler heating system (when removing nitrate scale, but also need to add it). Hydrofluoric acid), and very little corrosion cast iron hot water boiler. Pickling has the effect of dissolving, peeling and loosening.
