Operation status and existing problems of dust collectors in power plants. Main element content in coal (percentage of working mass): carbon52.99%; Hydrogen3.63%; Oxygen5.7%; Nitrogen0.57%; Sulfur0.13%; Grey28.1%；水分8.88%Low level calorific value of coal material4902kcal/kg.Dust composition:SiO，67.57%；AlO，19.88%.Coal ash specific resistance (Ω)cm）At room temperature100℃150℃190Design coal type at ℃2.82×101.74×106.77×101.30×10Inlet temperature of flue gas125.4℃, high180℃； Dust content at flue gas inlet23g/m3, high32g/m3; Smoke volume3152760m3/h.

Main Performance Number Item Value1Each dust removal system processes the amount of flue gas/m3h-134677002Each dust collector processes the amount of flue gas/m3h-Dust collector operating temperature/℃125.44Negative pressure during dust collector operationKPa-5.885Dust collector flue gas flow rate/ms-11.0566Smoke treatment time/s14.27Through the resistance of the dust collector bodyKPa≤0.258Dust content at flue gas inlet/kgm-3239Design dust removal efficiency/%99Due to quality issues in the manufacturing and installation of equipment, the failure rate of electrostatic precipitators in the factory is high after production. Parts often fall off inside the electric field, and dust accumulates on the electrode plates and wires. The operating parameters are not ideal, and actual test results show that the inlet dust concentration is high（30～40g/Nm3）Greater than the design concentration (＜30g/Nm3）.

Survey and statistical results on the dust removal efficiency and civilized production of power plant dust collectors: electrostatic precipitator dust removal efficiency98.82%Input rate of vibration system98.5%High voltage system investment rate95%The grey water system has no leakage rate95%.The main factors affecting the efficiency of electrostatic precipitator are the electrode plate line and the vibration system, accounting for80%Leakage of air lock handhole and ash box handhole, accounting for83%, is the main factor causing dust collector leakage in power plants, so solutions should be taken from the above aspects.

Take measures and countermeasures to address these issues:

① During the shutdown period, perform maintenance on the electrostatic precipitator body Check;

② Strengthen the quality of maintenance;

③ New technology is adopted for equipment renovation during major and minor repairs.