Pipe corrosion and scaling
Thread Content
The raw coal used in the multi-component slurry gasification technology contains a certain amount of ash. Therefore, the high solid content in the black ash water will seriously corrode the pipelines. Especially the discharge water from the quenching chamber has a high pH value, which is easy to form Ca2+ and Mg2+ scale layers. A low pH value will seriously corrode the pipelines. PH=4-6 worries about the corrosion of the quenching chamber. PH=8-9 serious scaling, and a 6-9mm scale layer will be formed after precipitation. The pipeline resistance is large and brings inconvenience to the production and operation load. There are many factors that affect the pH value, which need to be discussed during the production process.
Try to use weakly acidic polycarboxylic acids, such as tannins, humic acid, etc., which have the ability to complex metal ions and are one of the components of some pipeline descaling and antiscaling agents on the market.