2019 02 BADOTHERM Pressure Measurement Benefits For Urea Plants
Like many chemical processes, also in urea plants pressure safety valves safeguard against too high pressures. Urea plants are however unique because the very corrosive and easy crystallizing ammonium-carbamate poses challenges to assure a safe and reliable operation of these safety valves. Passing safety valves can cause clogging of the outlet line and is a serious threat for safeguarding your equipment against too high pressures. Also loosing valuable ammonia and risking a negative environmental impact are related consequences. The synthesis section of a urea plant is safeguarded against too high pressures by synthesis safety valves. Operators prefer to operate the synthesis at a maximum operating pressure to realize a maximum conversion of ammonium carbamate into urea. But at the same time they need to be careful not to pop up the safety valves causing a major environmental impact and an unplanned expensive shut-down. This technical paper addresses abovementioned issues and presents the innovative BADOTHERM solution, which realizes a reliable and accurate measurement of the synthesis pressure and a detection method for passing safety valves. This solution can also be applied in other sections of a urea plant such as the recirculation section and hydrolyzer/desorber section.