What is ID fan in power plant?
The Induced Draft (ID) fans and Forced Draft (FD) fans provide control for draft and forced air zoning of fuel burned furnaces of steam generation plant of a thermal power plant. Forced Draft (FD) fans are used for supplying the combustion air into the furnace of a boiler.
What are ID and FD fans?
The key difference between a forced draft and an induced draft fan is, FD fan forces outside air into the heating system whereas an ID fan draws flue gases from the system out into the atmosphere. ID fan creates a negative pressure or suction to discharge the gases out after combustion from the furnace.
What are ID fans called?
Draught fans whether they are FD fans or ID fans are typically centrifugal fans. Forced draught fan is commonly referred as forced draft fan and induced draught fan as induced draft fan. Centrifugal fans are also called as radial fans and sometimes as centrifugal blowers.
How do you measure fan capacity?
Step 1 Open all air inlets and doors fully. Step 2 Turn on the fan to be tested. All fans should be tested individually and at full speed. Step 4 Average fan speed should be measured at 9 locations across the area of measurement.
What is the use of ID fan?
An induced draught fan (ID fan) is provided to maintain a negative pressure in the furnace by sucking the products of combustion from it with a slight positive pressure at the discharge end vis-à-vis the bottom of the chimney/stack.
Why ID fan is used in boiler?
What is fan capacity?
Fan capacity (m3 / hr) = average air speed (m / s) x area (height x width) through which air speed has been measured (m2) Fan Capacity (ft3 / min) = Average air speed (ft / min) x area (height x width) through which air speed has been measured (ft2)
How to balance an ID fan?
The delicate procedure of balancing involves the adding or removing of weight, in order to move the weight center towards the axis of rotation. Even the smallest layer of dust can produce a significant ID fan imbalance which in turn can cause an increase in mechanical vibration.
What is Idid fan imbalance and how to fix it?
ID fan imbalance is caused when either particulates and fluid build up within hollow compartments of the ID fans or when an uneven layer of build-up accumulates on the fan’s blades. The delicate procedure of balancing involves the adding or removing of weight, in order to move the weight center towards the axis of rotation.
What is ID fan cleaning?
An effective ID fan cleaning method, is a process that should maximise the efficiency of an induced draft fan, whilst maintaining the quality of its working form into the future.
What is the technical data for Nidec servo AC/DC fans and blowers?
Technical Data AC/DC Axial Fans & Blowers Air leak φD L L D＞ 0.5 1 Ai 2 i=1 N Air separation Axial Centrifugal Silent Axial Centrifugal Option Fans&Blowers DCfans ACfans www.nidec-servo.com 2008/2009 The DC fans and blowers of NIDEC SERVO have a function to send an alarm signal when the fan motor revolutions slow down.