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The (FBC) Fluidised Bed Combustion fired HAG system consists of a Fluidised Bed Combustion Furnace, Radiative Heat Exchanger, Convective Heat Exchanger, Heat Recovery Unit, Air pollution control equipment as well as Invertor controlled fans. |
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Indirect Hot Air Generator |
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Animation of Our Plants |
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Radiative Heat Exchanger comprises of a bank of S.S. Pipes, welded with a free floating Box Header, which rested on rollers, supported on a channel frame.
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Convective Heat Exchanger comprises of a bank of S.S./M.S Pipes, welded with a free floating Box Header rested on rollers, supported on a channel frame. These heat exchangers are in two stages, for increasing the overall system efficiency.
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The system offered is extremely simple and convenient to operate. Alarms and safety interlocks have been provided to ensure correct working of the HAG. The following are few of the safety inter locks.
- Unless C.A. Fan is switched on, the I.D.Fan / F.D.Fan / S.F.D.Fan / Fuel feeders will not operate.
- In case of high hot air temperature audio/visual alarms are activated on the panel.
- In case of high bed temperature audio/visual alarms are activated on the panel and fuel feeder speed is lowered down to minimum.
- In case of high and low condition of hot air duct pressure audio/visual alarms are activated on the panel for required observations and corrections.
- Visual alarms are activated, in case of fault in invertors.
PID Temperature controllers are provided for indicating/controlling:
- Furnace bed temperature
- Flue gas temperature
- Outlet Hot air temperature
Pressure transmitter and controller is provided for controlling :
- Outlet hot air duct pressure.
Draft gauges are provided at
Air wind box
Furnace suction pressure
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The panel is PLC based having sophisticated but user friendly controls enabling the operator to run the HAG in automatic or manual mode as desired. The control panel consists of main MCCB, inverter drives for fans and feeders with individual MCBs, annunciation module with hooter, PID controllers, indicating lamps and one auxiliary contact.
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