Which catalyst layers are most affected in the case of dry suction or a leak in the thermal system?
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Due to the focus on low costs and rapid construction when they were built, domestic sulfuric acid plants have a high failure rate; many of these plants have been in need of renovation (technical upgrades) since they began operating! At the same time, due to factors such as inexperienced operators and misjudgments, a significant number of accidents occur in these devices as well. Here, we discuss the assessment of the impact on the catalyst in case of problems with the dry absorption or thermal system, such as pump failure in the drying tower, severe foaming in one of the absorption towers, or leaks in the thermal system, as well as which layers of catalyst are most affected. This post was last edited by in the blink of an eye on 2009-4-17 12:18]
Only the third stage of catalyst powdering occurred, while stages one and two remained completely intact – how is that possible? http://bbs.hcbbs.com/viewthread.php?tid=441358&page=1#pid2377514
It should be section 3 and section 4, as the average inlet and outlet temperatures in sections 3 and 4 are relatively low
I think when taking in foam, the first thing to be affected is the four stages of alternating cold and hot temperatures. In our sulfur-based acid production process, the boilers leaked several times; it was later found that the main issue was a slight increase in resistance in Stage 1
The effects on the catalyst are mainly caused by condensation and temperature; they vary depending on the process, so it depends on the control parameters
I think it also depends on the location of the thermal equipment. If the thermal equipment at the exit of stage 4 in the sulfuric acid production process fails and water goes to the second absorption stage, it is likely not to affect the catalyst layer. If the economizer after heat exchange at the exit of stage 3 fails, moisture absorption will still occur mainly in the first absorption stage, so it should have little impact on stage 4 as well. However, once there is a problem with the thermal equipment, the system must be shut down; at that point, the leaked water vapor may not follow the intended flow path, and it could affect the nearby equipment.