Causes of evaporator fouling
Release time:
2022-10-18
Cause harm
Evaporator circulating cooling water contains a large number of salts, corrosion products and a variety of microorganisms, due to the lack of water treatment, the evaporator runs for a period of time on the water side there will be a large number of calcium, magnesium and carbonate scale and algae, microbial sludge, slime, etc., the dirt firmly attached to the inner surface of the copper tube, resulting in heat transfer deterioration, circulating pressure rises, the unit vacuum reduces the impact of the unit's operating efficiency, resulting in a larger Economic losses.
The traditional cleaning methods usually use chemical cleaning - acid cleaning, this method is effective for a variety of deposits, than the mechanical method to save time. However, chemical cleaning is corrosive to the system and other metal parts, and it is easy to corrode the equipment pipeline, and pollute the environment when discharging.
Descaling preparation
1, Disconnect the evaporator has nothing to do with other systems.
2, Open the evaporator water side of the high point of the air release valve and the steam side of the low point of the pilot valve, in order to ensure that the cleaning process reaction produced a large number of gases can be discharged in a timely manner and the fullness of the cleaning fluid; at the same time, through the pilot valve to monitor the process of cleaning heat exchanger leakage of the copper tube.
3, In order to monitor the cleaning effect of the system and the cleaning process of the corrosion of the equipment in the cleaning process, before the construction, will be equivalent to the standard corrosion of the equipment material test piece, monitor the pipe section were suspended in the cleaning tank.
Hot news