Function Of Forced Draft Fan In Boiler

Id fan will take the hot flue gases from furnace via dust collector dust separation system or fume extraction system and wi.

Function of forced draft fan in boiler.

Offered centrifugal type fans are fabricated for a minimum discharge capacity of 20 higher than the theoretical air required at 30 excess air at mcr and head 20 higher than required. We are engaged in manufacturing exporting and supplying wide array of forced draft fans. Forced draft fan fd fan in boilers. Normally it is done with the help of a forced draft fan.

Forced draft fd a fan is used to force air into the boiler to provide more air for combustion. In the case of a steam boiler assembly this fan is of great importance as we know for a steam boiler to generate steam. Draught fans are a type of industrial process fans and are broadly divided into two types forced draft fd fan and induced draft id fan. Forced draft fan is a type of a fan supplying pressurized air to a system.

Id fan is basically mentioned here for induced draft fan and id fan is always located between dust collector and chimney. When mechanical ventilation is supplied to these boilers the heat transfer rate increases. The primary difference between a forced draft and induced draft is fd fan forces outside air into the heating system whereas id fan draws flue gases from the system out into the atmosphere. In this case the system is said to operate under induced draft.

This is called fd fan. The fd fan provides the pressure and flow required to push air fuel and the resulting flue gases created from combustion through the boiler catalysts economizer fgr ductwork and stack. When air or flue gases are maintained above atmospheric pressure. Induced draft fan or id fan is used to create a vacuum or negative pressure in a system like steam boiler or thermal oil heater.

A fd fan moves cooler air into the combustion zone while the id fan removes the products of combustion from that zone. Forced draft fan is used basically for providing the required quantity of hot air to the furnace for smooth and uniform combustion of fuel. A forced draft fan is typically much smaller than an induced draft fan. And this requirement is compensated by a forced draft fan.

When air or flue gases flow under the effect of a gradually decreasing pressure below atmospheric pressure.