Converter gas dispersion ignition

  Converter gas discharge ignition
  In order to timely and accurately reflect the anti backfire information, Xi'an Jiahua thermal equipment Co
, Ltd
first proposed to install a micro differential pressure transmitter on each blowoff pipe
When the pressure of the blowoff pipe is less than 3kpa, the nitrogen purge valve will automatically open, and the blowoff cylinder will be purged for 1min to prevent backfire
At the same time, a dynamic fluid flame arrester is set in the flare burner to prevent the converter gas from flowing slowly at low blowoff pressure, To prevent the inflow of air, the two anti backfire devices are used at the same time, which can effectively prevent the generation of backfire and ensure the normal and stable operation of gas emission combustion In order to prevent backfire during the conversion of the three-way water seal check valve, the three-way valve shall be purged with nitrogen during the conversion process (from release to recovery, from recovery to release)
The nitrogen purging time requirements can not only prevent backfire during the conversion of the three-way valve, but also ensure the pressure of the nitrogen main pipe
The nitrogen purging time is set to 20 seconds, Through the field practice of Xi'an Jiahua thermal equipment Co
, Ltd
, it is proved that the nitrogen purging time is set at 20 seconds during the normal conversion of the three-way valve
The influence of the fan on the tempering factor
The fan is a very key equipment in the converter smelting process
The special conditions in operation mainly include five abnormal conditions: Fan interlock protection tripping, fan interlock speed reduction, fan trip point, and excessive oxygen content, In order to determine the process characteristics of the fan under special circumstances, Xi'an Jiahua thermal equipment Co
, Ltd
has developed an anti backfire scheme after repeated research and analysis: ① reduce the fan speed to 30r/min and close the fan inlet valve
② In case of fan failure, the nitrogen purging shall be more than 4min
③ Purge with nitrogen for 20 seconds when releasing and recovering
The above measures are controlled by PLC interlocking