Electrostatic capture current
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The secondary voltage of the electrostatic tar catcher is nearly at full load (rated at 65 KV, currently at 55–60 KV), yet the secondary current is only one-third of the rated value (rated at 1500 mA, currently at 500 mA), resulting in poor tar removal efficiency. The gas volume is only one-third. What’s the reason?
For pre-combustor electrostatic capture, during operation in winter, the electric field voltage rises and the current decreases due to the accumulation of impurities such as naphthalene in the electric field; in such cases, it is necessary to clean the electric field, and significant improvements can be achieved after cleaning. Furthermore, insufficient processing capacity is also a reason for the low current, but it will by no means reduce the efficiency of electrostatic precipitation.
Too much ash has accumulated in the electrostatic precipitator; it needs to be cleaned
Agree with the opinion above. There’s too much tar and dust
Too much accumulation of impurities such as tar and naphthalene crystals; it is recommended to clean it promptly.
The most important maintenance for electrostatic precipitators is to apply spray regularly when necessary. Regarding the issue you mentioned, if possible, use steam for cleaning during power outages to melt the tar and naphthalene and then discharge them. If that doesn’t work, power needs to be cut off for flushing or it needs to be opened for inspection.
1. The primary current (under operating conditions, not in simulation mode) may be insufficient； 2. The internal components need to be cleaned; excessive accumulation of coal ash affects performance.