2012 05 Xu Ningxia High moisture in urea product

Briefly introduce the phenomena of high moisture content in urea product. Investigation of some twelve factors affecting this problem has been done and suggestions for solving the problems are provided. To solve the problem determined above, the booster ejector cracking shall be provided with grinding and repair welding, and after reassembly, the moisture content in product urea returned to 0.2 wt% ~ 0.25 wt%.
The 2nd-stage evaporator booster of the fertilizer urea unit of PetroChina Ningxia Petrochemical Company has never been overhauled after being put into operation in 1988, with no relevant reports from similar enterprises on its failures, which poses some difficulties in problem analysis and determination. Therefore, it is necessary to conduct regular overhauls for key equipment.

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