The Design And Research Of Corrugated Catalyst Plate

As an effective innovation of the traditional random dumped catalysts in fixed bed reactors, Structured Catalyst Packing(SCP) has been widely used in the treatments of flue/waste gases, due to the advantages of low pressure drop, good fluid distribution, dustproof , and so on. In sulfuric acid production, the production capacity is seriously influenced by the pressure drop of SO2 conversion section. It is of great importance to develop a novel SCP to reduce the pressure drop of the catalysts bed.Based on the geometric shape of corrugated packings adopted in the fields ofseparation engineering, and considering the peculiar characteristics of catalysts, anew type of structured catalyst packing, Corrugated Catalyst Plate(CCP) for 502conversion, was designed and studied.The experiments showed that CCP can sustain the normal stress of 15kg/cm2, which is competent for the industrial production. The mechanic strength of CCP is notably affected by the shaping pressure below 1 OMpa., and the pressure above lOMpa affects the strength insignificantly.The fluid dynamic characteristics of CCP were studied in the paper. The results indicated that the pressure drop of CCP bed is only 1/10?1/5 of that of the traditional fixed bed at the same voidage. The pressure drop of CCP bed is determined by the folding angle of corrugation, corrugation inclination angle, corrugation height and plate thickness. The pressure drop is in concordance with the model:The exterior mass transfer was also researched. Intense turbulence may be acquired in the CCP bed at relatively low fluid velocity. At the range from 400 to 1200, the Renold number(Re) has little effect on the mass transfer. The exterior mass transfer coefficient may be correlated as follows: j,, = 0.0351 Re~~5.Finally theoretical calculation was made on the effective factor of CCP. For a first order irreversible reaction: A?B, the effective factor of CCP lies between that of cylindrical catalyst and thinplate catalyst. The effective factor is to some extent affected by corrugation height and folding angle.