Reason of seriously fouling of alkali solution cooler was analyzed for de-carbon system in ammonia synthesis plant,improvement scheme and preventive measures were presented from aspects of changing structure type,adding protective facility and improving operating mode etc.

Choice of grinding wheel and coolant during grinding outer ring raceway and rib of bearing synchronistically;

Choice and management of coolant during bearing grinding;

The reasons and eliminating method of coolant temperature unconventionality of internal combustion engine;