Reasons for lower dust removal efficiency

The reasons for the lower dust removal efficiency mainly include large heteropolar spacing difference, uneven distribution of airflow, large air leakage rate, high specific resistance of dust particles, unstable high-voltage power supply, flue gas conditions do not meet the design conditions, mechanical failure and so on. 

Differential spacing is too large: the unreasonable spacing of different poles will lead to uneven distribution of electric field strength, affecting the efficiency of dust removal.
Uneven distribution of airflow: the distribution plate is blocked with ash or uneven distribution of airflow will lead to poor dust removal effect in some areas.
Large air leakage rate: air leakage will lead to an increase in the flue gas flow rate and a decrease in temperature, which will affect the charging performance of dust particles.
High specific resistance of dust particles: High specific resistance will affect the charging and deposition of dust particles, which may lead to anti-corona phenomenon and reduce the dust removal efficiency.
High-voltage power supply instability: unstable power supply will affect the electric field strength, which in turn affects the dust removal effect.
Flue gas conditions do not meet the design conditions: Changes in working conditions lead to the flue gas conditions into the ESP do not match the original design, affecting the dust removal efficiency.
Mechanical failure: Mechanical failures such as poor vibration function and falling off of the ash hopper flow stopper will affect the dust removal efficiency.
In addition, the design and maintenance condition of the dust collector is also an important factor affecting the dust removal efficiency. For example, the performance of the bag used in the dust collector, the nature of the dust, air leakage and resistance, the influence of the dust layer, etc. will have a direct impact on the dust removal efficiency. Therefore, keeping the dust collector in good condition and regular maintenance is the key to improve the dust removal efficiency.