Analysis of the reasons for the detachment of the internal linings in the two devices

During construction, the lining is not laid properly； During the heating process of the two devices, the heating rate was not controlled in accordance with the prescribed heating curve, which led to the detachment of the lining ； In the actual production process, the lining peels off due to catalyst wear and erosion. The preventive measure is to exercise strict control at the source, increase the temperature gradually, and analyze the physical properties of the catalyst in a timely manner during the production process.

We cannot control the construction quality, but we can control the heating curve; it is essential to operate it properly. Some people do not pay attention to the rate of temperature increase before ignition; this is the phase of temperature rise prior to reaching the first threshold. The purpose of maintaining a constant temperature during this phase is to remove surface moisture, and it is also the time when pressure is built up inside the two vessels. People often neglect the temperature increase curve, and some managers, lacking understanding, give arbitrary instructions, resulting in fluctuations in temperature and a deviation from the predetermined curve – which is a serious mistake. When this happens, the seeds of trouble are already sown; no matter how well the curve controlling the removal of crystal water at the second stage is managed afterward, it will be of no use. The heating rate before ignition should be controlled at 5~10°C/h; it must not be too fast.

1. To ensure that the lining can be used in good condition over a long period of time, three key aspects must be properly managed: the quality of the lining material, the quality of the lining installation process, and the baking process for the lining. 2. Since these three aspects fall under different specialized fields, and there are few people who have expertise in all of them, even fewer possess the authority to make decisions; as a result, ensuring high-quality linings remains more of an aspiration than a reality. 3. The reason why the linings of catalytic converters now last much longer than in the past is mainly due to improved material properties – specifically, a significant increase in compressive and flexural strength, while still maintaining an acceptable thermal conductivity. 4. As for controlling the latter two aspects, the results are not satisfactory at all. Some idealistic managers proposed collecting evidence from the constructors; the essence remains unchanged – what’s the use of gathering such evidence? 5. Back to the topic: What are the reasons for the detachment of the catalyst regenerator lining? How to avoid it? It is both simple and complex: in essence, giving it proper attention ensures a long lifespan, while neglecting it makes it difficult to resolve the issues. :lol

Strengthen management during production and place emphasis on quality； Strengthen training during use and pay attention to the manufacturing process.