NDFR–1 Smoke Duct Combustion System

1.Summarize

A set of air duct burners is installed on hot air preheater export wind mother tube. Air duct burner oil gun output is 200 ~ 300 kg/h. Using duct burner heating primary air, making primary temperature meet the requirements of rev grinding temperature, rev grinding powder.

Duct burners are using of double strong oil burner. It has characteristics of flame stability and high burn off rate. Duct burner fuel line adopts double off fast valve, ensure the duct burner stopped running fuel zero leakage. Place primary air generating duct burner downstream tube installing 2 thermocouples are used for temperature detection of primary air after heating. Duct burner flame detection and temperature detection means to ensure the safety and reliability of the operation of the.

The wind duct burner used for high pressure fan, but also a fan of a cold wind outlet for oil burner stops blowing wind.

2.Characteristic

-With low pressure forced air distribution burner, oil burning rate above 99%.

-Oil gun head mounted cyclone stable-combustion cover to ensure that the small oil gun steady combustion.

-Combustion air distribution through the butterfly valve adjustment, to ensure the best combustion condition, ensure the burning rate is more than 99%, make sure not happen internal oil leakage, and prevent measures of the coal pulverizing system explosions due to occur.

-In stainless steel cylinder combustion flame, do not contact a duct, ensure the safety of a duct.

Combustion tube front top equipped with stainless steel shield, ensure the flame front is not in contact with a duct, ensure the safety of a duct again.

-Flame detector for detecting combustion state, the fire and no fire signals and fire intensity, to provide fire protection.

-In situ ignition control cabinet: with in situ single-step operation, DCS remote control operating functions, have fire protection function.

3.Safety guarantee measures

Add air duct burner to heat a cold wind cold furnace pulverizing, mother is at the side of the hot primary air pipe installed on the duct burner heating a wind, installation location in a hot wind pipe elbow. The advantages for the system is simple, and ground air temperature quick heating, can provide meet the requirements of the pulverizing hot blast temperature. About adding a wind duct burner after mother tube, security issues and grinding machine is controlled by the following means.

4.Duct burners equipment characteristics

-The duct burner for low pressure forced air distribution burner, oil burning rate above 99%.

-Air duct burner outlet installation of fire protection and internal liner, as well as protect the flame from a wind blew out, and can be in flame envelope lining tube, to avoid oil flame radiation heat transfer directly to the duct wall.

-Air duct burner installation location to the distance between coal mill, there would be no oil mist or Mars into the coal mill.