Accident case

November 09, 2023
During the maintenance operation in the hot air duct of a thermal power plant,
the thermal control maintenance worker did not check the equipment name and
identification without the conditions for equipment trial operation, and opened
the inlet heat-secondary air pneumatic sliding door air source solenoid valve and
The Air Source manual valve with the safety tagout of "No operation and
manned work" is hung, so that the previously closed thermal primary air
pneumatic sliding door at the inlet of C coal mill is opened, so that hot air with a
temperature of 309C and a pressure of 6kPa is sprayed into the inlet primary air.
In the road, a production safety accident caused 3 deaths.
When a methanol factory was about to complete the maintenance of the
circulating water axial flow fan and replace the fan blades, the workshop
director on site notified to prepare for the start-up trial operation.
Under such circumstances, the main air switch of the axial flow fan in the
power distribution room was closed in violation of regulations, causing the
axial flow fan to start up by mistake, resulting in a production safety
accident in which 3 people were killed and 1 person was slightly injured.
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