How to avoid the coking of diesel fired boiler

Under normal circumstances,with the temperature decreasing,the liquid ash will turn into softening state,and then solid,if the ash maintaining softening state touches the heating surface of diesel fired boiler,the coking will form,for the ash cools down and bonds on the heating surface.The coking will reduce the boiler thermal efficiency, and shorten the service life of the diesel fuel boiler,therefore,this text will give the following measures to avoid the coking of diesel boiler:

Reasonable furnace outlet temperature

Ensuring that the main parameters are qualified and the furnace outlet temperature is lower than the coal ash melting point,as well as the the steam is qualified,which can prevent the furnace outlet coking of diesel fired boiler effectively.

Good mixing of air and fuel

The good mixing of air and fuel can prevent the formation of reduction gas near the water wall ,which can prevent the local severe fouling and coking.

Increasing the primary air speed appropriately

Increasing the primary air speed can delay the ignition of fuel,can make the point of ignition farther from the burner,the high-temperature zone of flame also goes to the center of furnace,which can the coking near the nozzle.

Controlling the load of diesel boiler reasonably

In the process of reducing the load of diesel boiler,if the combustion is not stable,the load reduction should be suspended,it can continue after combustion stability.

Appropriately increasing the air volume

The total air volume into the furnace should not be lower than design value,If necessary,the air volume should be appropriately increased to prevent the serious coking of furnace.

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