With the widespread application of ultra-low emission transformation of thermal power plants

flue gas waste heat utilization equipments such as low temperature economizer has been widely used. In this paper

the problems occur in low temperature economizer in practical engineering application

such as low temperature corrosion

abrasion

ash deposition and blockage

and vibration

are described

and the causes and main influence factors of these problems are analyzed. Moreover

the corresponding countermeasures are put forward

such as selecting materials with excellent low-temperature corrosion resistance to manufacture heat exchanger

reasonably designing the heating surface structure type

controlling the flue gas flow rate and metal wall temperature of heating surface

installing soot blowing equipment

guide plate and shockproof partition

which effectively solves the problems of low-temperature corrosion

abrasion

ash deposition and blockage

and vibration existing in the flue gas waste heat utilization equipment.