Flow Through Venturi before Mill Inlet

Venturi is a flow measuring device used in Hot Primary Air Duct path before Mill Inlet to control mixed air flow to mill. Generally as many no of mills are constructed for power plant, the same no of venturies are installed in the duct path of hot primary air. There are 6 nos of venturi used in 270 MW coal fired boiler. The flow path inside one venturi is taken under observation. The Boundary Conditions are taken as field values.

• Mass Flow Rate of Mixed Air :- 23.42 Kg/sec.
• Medium Temperature :- 519 K.
• Pressure at Mixed Air Duct Inlet :- 700 mmWC.
• Pressure at Venturi Outlet :- 660 mmWC.

Model View

Applying Boundary Conditions

Results

Pathline Animations

Flow Analysis of Air Foil in a Coal Fired Boiler

Air Foil is placed between Air Preheater and Windbox in Secondary Air flow path in a coal fired boiler. It is a flow measuring device for combustion air and used for maintaining flow of air to corner fired burners connected through Windbox. For 270MW Boiler two nos of Air Foil are used in both left and right side through duct path of Secondary Air. In this analysis the flow path of air inside the Air Foil is taken under observation according to the field values of different parameters.

• Mass Flow Rate :- 92.787 Kg/sec.
• Medium Temperature :- 577 K.
• Pressure at Hot Secondary Air Duct inlet :- 164 mmWC.
• Pressure at Air Foil Duct outlet :- 100 mmWC.

Model View

Mesh View

After Applying Boundary Conditions

Results

Pathline Animations