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Why should the induced and blower ventilation be started for 10-15min before the boiler is ignited?

2020-08-25 09:23    page view:

Guide: In order to prevent combustible gas or pulverized coal remaining in the furnace after the last shutdown, the fuel system may leak into the furnace due to the lack of tight fuel system during the shutdown. If the concentration of combustible gas or coal powder is within the explosion limit, it will cause the furnace to explode, damage the furnace wall, and even cause personal injury. Before ignition, start the induced and blower fans, keep 10%-15% of the rated air volume, and ventilate for 10-15 minutes.

  In order to prevent combustible gas or pulverized coal remaining in the furnace after the last shutdown, the fuel system may leak into the furnace due to the lack of tight fuel system during the shutdown. If the concentration of combustible gas or coal powder is within the explosion limit, it will cause the furnace to explode, damage the furnace wall, and even cause personal injury. Before ignition, start the induced and blower fans, keep 10%-15% of the rated air volume, and ventilate for 10-15min.

  Although the ventilation with large air volume cannot remove all the combustible gas or coal remaining or leaking into the furnace, it can dilute the concentration of combustible gas or coal in the furnace to the lower limit of the explosion limit to ensure the boiler ignition Time equipment and personal safety. Ignition should be carried out as soon as possible after the ventilation is over to avoid leakage of the fuel system, causing the concentration of combustible gas or coal powder in the furnace to rise again to within the explosive range.

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