How to view the issue of large temperature differences on a flat surface
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How should we view the issue of large temperature differences across the surface? Large temperature differences are a problem that exists to varying degrees in domestically produced towers, as patents are largely monopolized by foreign countries. Making major design breakthroughs is not an easy task either. Patent fees are also very high, and on top of that, ammonia synthesis companies operate with only minimal profits just to break even. There isn’t much money either to purchase advanced patents. Therefore, all basic modifications use domestic products. Internal design cannot also infringe on rights. The efficiency of use is also affected to varying degrees. The temperature difference across a plane can be as high as several hundred degrees, around thirty degrees in moderate cases, and less than ten degrees in minor cases. At the beginning of using the catalyst, pay attention to the dosage issue; as long as it does not affect the dosage and allows the hotspot temperature to remain at the initial operating level, if it affects the flow rate, the hotspot temperature can be increased appropriately in order to raise the low-temperature level as well, keeping it within the temperature range suitable for reactions. (It refers to an axial tower or an axial-radial tower); the maximum circulation rate should be achieved. Remedies ； During major maintenance, adjust the catalyst loading without replacing the basket, so that it tilts toward the lower side. It would be even better if the gas distribution position could be adjusted. Celebrate reaching the second grade once again
Large temperature differences across the surface are usually caused by uneven heating of the catalyst; this can be addressed by reducing the heating rate and increasing the circulation volume. The maximum temperature difference across the plane shall not exceed 30 degrees. The temperature difference across the surface of imported products is usually only a few degrees.
The issue of large temperature differences across the plane is mainly determined by the manufacturers responsible for the design and production of the internal components; in particular, the design of the distributor plays a crucial role
Reply 3# qsy supports it
Reply to 2# wnxxw: This viewpoint is also quite prominent; the relevant factors play a certain role in it, and it is a view that is often mentioned. It is beneficial to manufacturers and catalyst producers. This can be checked with little effort; during a major overhaul, if no baskets or catalysts need to be replaced and no minor modifications are made, it is possible to observe the situation while the vehicle is in use. One can also achieve considerable gains.