Corrosion issues of ceramic corrugated packing
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The system contains acetic acid and a small amount of hydrochloric acid. The distillation tower uses ceramic corrugated packing, which has suffered severe corrosion and almost no strength left; it turns into powder when squeezed by hand. Everyone, please analyze whether the problem lies in poor firing of the packing, or in an improper formula for the ceramic packing before firing
At least upload some pictures; it’s necessary to consider the physical and chemical properties of the specific material. Additionally, the corrosion resistance of ceramics also needs to be taken into account.
Ceramic fillers based on alumina do tend to become powdered easily, as their strength is already low; silicon carbide materials could be considered as an alternative. There is a company in China that produces such materials: Biaotao Technology (Shanghai) Co., Ltd
Ceramic corrugated packing is a new type of structured packing, composed of many packing units with the same geometric shape. Due to its unique structure, ceramics possess excellent hydrophilic properties; a very thin film of liquid can form on their surface. The turbulence in this film and the tortuous pathways created by the airflow help to facilitate the flow of air without blocking it, allowing ceramic fillers to compete with metal fillers. Moreover, their corrosion resistance and high-temperature tolerance are qualities that metal fillers cannot match. Ceramic corrugated packing has a surface structure that provides good wettability, enabling faster flow of liquids and reducing the amount of liquid retained by the packing. Opportunities for aggregation and coking.
What is the operating temperature of this system?
This may not be the cause of corrosion. It is possible that there is a variation in temperature inside the tower; if the tower’s temperature is not very stable, then the temperature in the packing layer will also fluctuate, which can lead to the ceramic material becoming fragmented and pieces of it falling off