Aiming at the problem of pressure difference swift rise of reverse osmosis device of chem?istry water treatment system in operation of 2×660 MW ultra supercritical unit in Datang Nanjing Elec?tric Power Plant

analyzes the cause of fault

the fault reason is that sludge dewatering separated liquidcontaining high polymer coagulant(polyacrylamide) come into reverse osmosis system

which causedthe serious blockage of the reverse osmosis membrane. By using the methods of combining off linephysical clearance with on line chemical cleaning

make reverse osmosis device resuming normal op?eration. The analysis result shows that: the chemical water treatment unit with reverse osmosis systemin new built power plant

the sludge dewatering separated liquid containing macromolecule polyacryl?amide should be discharge solely into the industrial waste water pool or coal rinsing water multiplexingsystem

avoid serious pollution of follow-up membrane element of reverse osmosis system.