Comparison of ultra large scale rectisol process and analysis of common production problems
The development process of rectisol technology was briefly introduced,and the characteristics of the ultra large scale rectisol process developed by Lurgi and Linde were analyzed.Taking two Chinese production units that had been put into operation and used the Lurgi process and Linde process respectively,with a feed gas treatment capacity of over 1 million m3/h,as an example,their advantages and disadvantages were analyzed from the aspects of feed gas pretreatment and cooling,absorption tower and thermal regeneration tower,key process parameters,etc.The introduction was also made on the problems occurred and measures taken during the production of the two units in recent years,such as leakage of rich and lean methanol heat exchanger,leakage of coiled tube heat exchanger and total sulfur exceeding the limit.
ultra large scale rectisolLurgi processLinde processanalysis and comparison