With the increase of unit capacity

the medium pressure of sub-system also changes from low pressure to medium and high pressure

which improves the requirements of debugging and operation. Chemical accidents and anomalies occurred in commissioning of large thermal power units

such as leakage of high-speed mixed bed

low pH value of stator cooling water

water vaporization spewing out directly from artificial sampling tray

turbidity of water clarifying tank of water purification station

pH value of slurry of receiving tower dropping to strong acid

etc. Analysis of its causes are mainly water cap quality

water cap installation quality and other unqualified. Unreasonable resin proportion and selection. Water vapor samples are not cooled in time in the circulating pump; Unreasonable dosage of water purification station

too much water intake load adjustment. Absorption tower wrong slurry supply way

etc. The treatment measures are to check the water cap winding wire and water cap installation gap. Reasonable selection of resin. Timely adjustment of sampling parts of the sampling door

pressure reducing valve. Control the dosage of water purification station

equipment load. Adjust the absorption tower slurry supply mode

etc. The treatment of these accidents is very representative and can provide reference experience for debugging and operation workers when dealing with similar chemical accidents.