The first layer of the converter is overheating; can we reduce the amount of catalyst in layer 1 and distribute it across layers 2, 3, and 4? ?
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Four-stage conversion, 3-1-4-2 process; the catalyst in stage 1 overheats. Is it possible to reduce the amount of catalyst used in stage 1 and distribute it among stages 2, 3, and 4? Can the conversion rate be guaranteed? Does it have an impact on the acid temperature during the first and second absorption steps? :)
Lowering the inlet temperature of a section will solve the problem. Generally, a section of catalyst is not installed in the later part.
The catalyst is either taken out from that section, screened, and then installed back into the original section. Either load it from back to front. The order cannot be reversed. Furthermore, the four-stage catalyst uses a low-temperature catalyst. For these four sections, we use either S107 or S108; one section uses both S101 and S107. Generally, you should calculate the tonnage for each section before installing the catalyst. It will definitely affect the conversion rate. Those that have no effect on acid temperature
Reducing the amount of catalyst in one layer and using it in the second, third, and fourth layers respectively is definitely not feasible! Excessive temperature indicates that the concentration of the incoming gas is too high. Reducing the inlet temperature will lower the outlet temperature as well; if the temperature remains high, the only solution is to reduce the concentration of the incoming gas.
The catalyst cannot be packaged from stage 1 to stages 2 and 3. If the inlet temperature is high, and the gas concentration is too high, reduce the gas concentration, or partially open the air supply holes for purification.
The best solution is to reduce the gas concentration or appropriately lower the inlet temperature.
Analyze the specific reasons in detail; identify the exact causes of overheating and then take corresponding measures.
It’s better not to. The temperature is high on the first layer; it’s not that high further back, right?
Are there any DCS screenshots of the converted dry absorption? It depends on the concentration of imported SO2 undergoing conversion; if it is no more than 14%, the upper part of Layer 1 can be replaced with a cesium-containing catalyst (such as XCS120), and the heat exchangers and side lines in the primary conversion section must be adjusted so that the inlet temperature of Layer 1 is 390 degrees. To increase the overall conversion rate, it is necessary to advance the reaction and load as much catalyst as possible in the preceding bed layers (provided that the bottom of each layer does not overheat).