What Are The Key Points For Boiler Cleaning And Descaling?

Temporary system pressure: During the pressure process, carefully check the welds to ensure that there is no danger. In the pickling process, hydrogen fluoride ammonia needs to be added, and the tightness and corrosion resistance of the weld are higher than that of pure hydrochloric acid pickling.

Washing: After the acid washing of the water wall system is completed, it is recommended to close the vacuum drain of the drain door, open the drain door after the water is full, and finally maintain the continuous cleaning of the steam level. This saves time compared to the method of not discharging acid and direct draining. Compared with directly maintaining the normally open drain of the drain door, it is not easy to produce secondary rust, and the cleaning effect is also fully guaranteed.

Passivation liquid discharge: When stopping the pump discharge, maintain the high water level of the steam drum, first open the economizer recirculation door, steam drum accident discharge door, continuous row door, fixed discharge door, furnace heating doors, drain discharge door, and discharge After a certain period of time, the passivation liquid in the economizer and the water wall is discharged. In this way, it can be ensured that after the valve is flushed with pressure, the valve core is not easily caused by the corrosion that peeled off during the pickling process.

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