1. Through measurement, the dirt of the hot water boiler is above 1.5mm, so you can consider using acidic solution to clean the dirt. If the thickness of the dirt is 0.5-1.5mm, it is not suitable for cleaning with acidic solution, you can consider using a new type of descaling agent or alkaline solution for cleaning.

2. When cleaning with acidic solution, add formalin appropriately to control the corrosion rate of the hot water boiler.

3. Achieve effective maintenance and protection of biomass boilers, and minimize the generation of fouling.