Analysis and countermeasures of desalination water system operation problems in polypropylene plant
The causes of high unit consumption of desalination water in 1×105 t/a polypropylene(PP)plant of Ningxia Petrochemical Company of PetroChina were analyzed,and the corresponding improvement measures were taken.The results showed that the main reason for the high unit con-sumption of desalination water was that the con-sumption of desalination water of the N2 scrubber(T-502)of the drying system and the extrusion granulation section was large,and the washing water of T-502 overflow port was not effectively recycled.The washing water of T-502 overflow port was re-covered by adding a recovery-filtration water tank,and the self-circulating washing water in T-502 was replaced with fresh desalination water regularly,so that the unit consumption of plant desalination water was reduced from 0.45 t/t to 0.23 t/t,and the corro-sion problem of equipment caused by the increase of impurities in washing water and weak acidity was al-leviated.
NETL
NSTL
万方数据
