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ＳＯ＿２浓度小于１．２％时，应采用绝热式结构，催化剂为一层；当ＳＯ＿２浓度为１．２％～２．５％时，可采用一点散热式结构，催化剂分为二层；当ＳＯ＿２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ＳＯ＿２浓度为４％～８％时，应采用冷激式结构，催化剂分为三层。非定态ＳＯ＿２转化器自热操作ＳＯ＿２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 SO_2 conversion on a 1500t H_2SO_4/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 SO_2concentration is < 1. 2 %, the one-point heat removalconverter with 2 beds is for SO_2 of 1. 2%-2. 5%,the two-point heat removal convertot with 3 beds isfor SO_2 of 2. 5%-4%, and the quenching converterwith 3 beds is for SO_2 of 4% ￣8%,respectively. Thelower limit of SO_2 concentration for an unsteadystate cohverter to work autothermically is defined as0. 5 % by computer calculation. The exit temperaturebuffer protected the valves and ensured the normaloperation of absorption tower as well.
出处
《硫酸工业》
CAS
1995年第1期3-13,共11页
Sulphuric Acid Industry
