摘要
针对新的国家环保标准要求 ,硫酸装置排放的尾气中SO2 浓度应低于 96 0mg/m3 。分析了常用的“3+1”和“3+2”两种转化工艺的特点 ,结合硫磺制酸工艺指出 :在采用现一种催化剂的情况下 ,“3+2”转化工艺原料气的 φ(SO2 )比“3+1”的更高时 ,仍可获得同样高的最终转化率 ;在原料气中 φ(SO2 )相同的条件下 ,“3+2”转化工艺对达到要求的最终转化率会更有保障。并建议 :采用国产催化剂时宜选用“3+2”五段转化 ;采用进口催化剂时可选用“3+1”四段转化。
According to the new national environmental protection standard, SO 2 content in the tail gas emitted from the sulfuric acid plant shall be lower than 960 mg/m 3. It analyzes the features of '3+1' and '3+2' conversion processes and points out when using one kind of catalyst,φ( SO 2) in '3+2' feed gas conversion is higher than that in '3+1' feed gas conversion, the same final conversion rate can be reached. When φ(SO 2) in '3+2' feed gas conversion is the same as that in '3+1' conversion process gas, '3+2' conversion process can ensure the required final conversion rate. It suggests that it is better to use domestic catalyst for '3+2' conversion and the imported catalyst for '3+1' conversion.
出处
《硫磷设计与粉体工程》
2002年第5期34-37,共4页
Sulphur Phosphorus & Bulk Materials Handling Related Engineering
