Total height of the packing in the decarbonization tower
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No one noticed this problem. For propylene carbonyl decarboxylation, the total height of the filler was already set at 18 m in the original 40 kt/a urea design (pilot version). Future designs will continue to maintain this height; it seems reasonable to do so. But some people also make modifications. The design parameters for the decarbonization tower of Anhui Linquan Chemical Co., Ltd. are: operating pressure of 2.7 MPa ； 4 layers of filler, with a height of 7 m per layer ； The gas-liquid ratio inside the tower is 103 m3/m3 ； The CO2 emitted from the tower is ≤0.1%. This is a good indicator. The actual operating parameters of the decarbonization tower at Hebei Dongguang Chemical Co., Ltd. are: operating pressure of 1.7 MPa ； 5 layers of filler, with a height of 6 m per layer ； In summer, the CO2 emission from this tower is ≤0.3%. Therefore, the author believes that if possible, making the decarbonization tower taller often yields unexpected results.
Attention to the poster: The main difference between these two operating conditions is the operating pressure. A decarburization tower with an operating pressure of 1.7 MPa cannot achieve a CO2 level of ≤0.1%, no matter how high the packing height is; however, if the operating temperature is lower, it is possible to achieve a CO2 level better than ≤0.3%