摘要
对１５００ｔ／ａ规模的非定态二氧化硫转化技术中间试验进行总结。这次中间试验发现了冷激式非定态转化器；并验证了理论研究提出的出口气体温度稳定器；对已有的三种结构形式：绝热式、一点散热式、二点散热式进行了更为深入的研究。结果表明：当ＳＯ２浓度小于１．５％时，应采用绝热式结构，催化剂为一层；当ＳＯ２浓度为１．５％～２．５％时，可采用一点散热式结构，催化剂分为二层；当ＳＯ２浓度为２．５％～４％时，可采用二点散热式结构，催化剂分为三层；当ＳＯ２浓度为４％～８％时，应采用冷激式结构，催化剂分为三层。非定态ＳＯ２转化器自热操作ＳＯ２浓度下限由理论计算确定为０．５％。所提出的出口气体温度稳定器具有很好的稳定性能，既保护了阀门，又保证了吸收塔的正常操作。
The pilot experiment of unsteady-state SO2 conversion on a 1500 t H2SO4/a scale was summarized.A quenching unsteady-state converter was proposedand the exit temperature buffer proposed on the basisof theoretical research was verified. Three existingconfigurations of unsteady-state converters, here defined as adiabatic, one-point heat removal and twopoint .heat removal, were investigated in more detail.The results indicated that the adiabatic converterwith a single bed is suitable for the case where SO2concentration is <1. 5 %, the one-point heat removalconverter with 2 beds is for SO2 of 1. 5 % ～2. 5% ,the two-point heat removal converter with 3 beds isfor SO2 of 2. 5 %～4 %, and the quenching converterwith 3 beds is for SO2 of 4%～8%, respectively.The lower limit of SO2 concentration for an unsteady-state converter to work autothermically is defined as 0. 5% by computer calculation. The exittemperature buffer protected the valves and ensuredthe normal operation of absorption tower as well.
出处
《硫酸工业》
CAS
1995年第2期3-18,共16页
Sulphuric Acid Industry
