Investigating the methods of starting sulfur recovery (hot and cold substrate) and calibration in a cold bed method

In this paper I will try to compare the presently practised design on warming up of sulfur reactor beds to 300 degree farnhyte in SRU start ups from cold against the concept of cold reactor bed start ups designed & developed by the Ortloff of USA from 1970 and is practiced in their designed plants since then . To me , the cold reactor bed start up is a much better theory and has many advantages. To effect this theory , Ortloff utilises 2 especial controll valves for bypassing the beds during the plant warm up from cold (to keep them safe from harm ) . I have come to realise that the use of those control valves which are so sophisticated and expensive and can be troublesome are not required and installation of 2 hammer blinds can effectively displace those valves and create a more reliable operation.