converter

Many reasons. What has a fast temperature rise and a large operating range.

Converter tubes have a temperature limit of no more than 1100°C. It is strictly prohibited to extinguish the flame inside the tubes. During normal operation, uneven distribution of the catalyst, bridging, or poisoning or breakdown of the catalyst over time can lead to uneven temperatures inside the tubes. Local overheating occurs, with many instances of hot spots, hot zones, and heat pipes. Generally, after this phenomenon occurs, adjust the fire to lower the temperature in those areas. Hot spots are more dangerous than bright tubes; the temperature throughout a bright tube is relatively uniform, whereas hot spots can easily lead to tube rupture. It happened once in our company: there was a small leak in the furnace tube, which was not detectable through normal operations; it could only be seen inside the furnace, where blue flames were emerging from the crack. Action: Contact the relevant departments to prepare for shutting down operations. The replacement is successful; all the catalyst is removed, the furnace tube is replaced, and the catalyst is replaced or refilled. It’s a type of furnace with pigtail pipes at both the inlet and outlet. I’ve seen some manufacturers simply clamp those ends shut using special pliers; by turning off the heat near those furnace pipes and reducing the load on the equipment, the furnace can still operate.