Automatic pressure regulation for wet electrostatic precipitators can enhance equipment performance and ensure or even improve work efficiency. Let's take a look at the specific methods of automatic pressure regulation.

(1) Adjusting the electrode voltage of a wet electrostatic precipitator to the given frequency of spark discharge: Spark discharge only occurs when the electric field voltage reaches a certain level; as the voltage continues to increase, the frequency of spark discharge also increases until it reaches the breakdown effect. Efficiency of the wet electrostatic precipitator decreases when the spark discharge frequency exceeds 40-70 times per minute, due to increased energy consumption from spark breakdown.

Certainly, there are drawbacks to adjusting electrode voltage based on the frequency of spark discharge: since the system operates at a fixed frequency of spark discharge, the optimal frequency for spark discharge must change with the alteration of airflow parameters and the breakdown strength between electrodes. However, the wet electrostatic precipitator system does not respond to this, so when the frequency of spark discharge is not high but the discharge current is very large, it is prone to arc discharge – that is, an unstable state.

(2) Method for maintaining the peak value of a relatively high average voltage on the electrode: As the primary voltage of the transformer increases, the average voltage on the plate initially rises linearly, then begins to decline after reaching a high point. This is because the intensity of the spark discharge increases, and the larger average voltage on the electrode corresponds to the optimal frequency for spark discharge. Therefore, maintaining a relatively high level of average electrode voltage is equivalent to keeping the operating conditions of the wet electrostatic precipitator below the optimal frequency of spark discharge, which varies within a wide range according to the air flow parameters. This solves the "unstable state" of simply adjusting according to the given number of spark discharges.

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