Method: add H-1056, and the cleaning time will be decided by the condition of the system. (Generally, the cleaning time is about 2-5hours.) The degreasing work could be finished while there are no obvious oil droplets.
Method: add complex abluent H-1070 to the expansion tank and the cleaning work should be kept for 24-36 hours. After the abluent interact with the scale on the tube and the rust, the soluble substance, the resultant, should be discharged.
Technical requirements: main detect two indexes:
PH value should be around 6 ( organic complex abluent are used by our company);
Turbidity: with the effect of the abluent, the turbidity of water will be higher, and the water will be yellow and black.
No reagent should be added to the water while blanching. It would be better if the circulating water of the system could be fully discharged while blanching. Watering while discharging water is also a good way to reduce the concentration of water. It is required that the circulating water and the water added while blanching should have the similar PH value.
Purpose: molecular film should form on the tube wall to prevent corrosion.
Method: add H-1072, an agent used for passivation film, and H-1045 to the expansion tank and it should be circulated for 24-36 hours.
After finishing the passivation film of the tube, it could be in the routine maintenance stage if the water quality reach the requirement. Then enough corrosion and scale inhibitor H-8800 should be added and the concentration should be 2000-3000 mg/L.
While the water quality is stable, corrosion and scale inhibitor H-8800 should be added according to the detect result and the quantity of added water.
Technical services provided by our company could reach the following standard:
Corrosion rate: carbon steel ≤0.125mm/a,
copper/copper alloy ≤0.005mm/a
Water quality control indexes
Total of bacteria
Water treatment series reagent:
H-1070络合清洗剂H-1070 complex abluent
H-1072络合钝化预膜剂H-1072 complex Passivation film reagent
H-8800密闭及冷冻系统缓蚀阻垢剂H-8800 corrosion and scale inhibitor for sealed and chilled system
H-2011锅炉水缓蚀阻垢剂H-2011corrosion and scale inhibitor for boiler water