Control of oxygen content at the inlet of electrostatic precipitators for semi-water gas
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The oxygen content at the inlet of the electrostatic precipitator for semi-water gas is generally kept below 0.5%; an interlock shutdown occurs at 0.6%. Is there a way to control the 0.8% dropout rate? Are there any safety concerns?
Of course, there are security risks! Electrostatic precipitators are among the devices that are most sensitive to high oxygen levels. Generally, an alarm is triggered when O2 exceeds 0.5%, and the system shuts down at 0.6%.
Controlling the 0.8 jump-off is no problem. Many plants are designed to shut down when the oxygen content reaches 0.8%.
At what actual oxygen level does electrostatic dust removal generally become dangerous to safety? Thank you!
The oxygen content limit must not exceed 1.0%!
For safety, the oxygen content should be less than 0.5%. But since it often jumps on its own, we have adjusted it to 0.8% as well
Our unit sets an alarm at 0.4% and triggers shutdown at 0.5%. The oxygen meter is installed at the inlet of the primary electrostatic precipitator.
The normal range for O2 content is ≤0.4%; if it exceeds 0.6%, the output should be reduced, and if it reaches 1.0%, the system must be shut down immediately (power supply to be cut off).
The oxygen content in semi-water gas reaches 0.8%, which poses no safety issues, but it is harmful to the service life of the shift catalyst； If the shutdown threshold for oxygen content set in the electrostatic precipitator is too low, it can cause the device to shut down frequently, which is not favorable for production operations; therefore, the oxygen content is generally set at 0.8%. Now, with the advancement of gas generation technology and the improvement in the standards for gas generation processes, the oxygen content in semi-water gas rarely exceeds 0.8%.