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DUCT ENGINEERING

Good duct engineering & design is a key to efficient functioning of a plant.

Faulty Duct Engineering can cause severe problems. Most of the process industries suffer blockages created by poor ducting practices. Often the Bag Filter/ ESP stack is clean but there are fugitive emissions in the plant which are over-looked. Accurate duct engineering can avoid these problems.

New applications are now becoming common like Wagon Tippler & Truck Tippler for which Dust Extraction Systems play an important role.

IFI can design & develop an efficient Ventilation System to help you control fugitive emissions & get the most from your APC equipment. Contact us today to know how efficiently Duct Engineering can be done in 2D & 3D for your plant!

Building
  • Grid lines are created on the 00 elevation for RCC / Metallic Structures.
  • Based on the three views and associated sectional views, an accurate 3D model of the building is created.
  • This being a parametric model any further changes /as build can be incorporated without any delay or compromising accuracy.
  • All cut outs in the slabs are created using grid lines as the reference.
Equipment blocks and void areas
  • The blocks of the equipment to be ventilated are marked in the building drawing
  • Any voids – if specified – are added to the equipment blocks. Such as head rooms, maintenance approach areas, crane movement, staircase, cable treys, piping etc.
Hoods and their locations
  • Hood sizes are calculated in line with design criteria.
  • Guidelines mentioned in the industrial ventilation are used as check list.
  • The hoods are then located at the desired location.
Bag filter location
  • Correctly sized bag filter with accurate locations of the inlet and outlet flanges is located at the desired location

 

Single line for the duct
  • A 3D sketch is made for the duct centre line.
  • Correct duct diameters and duct entries, duct enlargements can be created either from calculated values or from the available sizes.
Duct drawing
  • Duct parts can be sketched around the single line.
  • Clearances from the void areas, duct inclination w.r.t. horizontal can be readily maintained.
  • Additional cut outs to the slab can be accurately marked.
Ventilation system
  • A ventilation system is thus created.
  • It can change its shape based on any changes made to the RCC building, bag filter support structure, location of pick up points or the specifications of ducts.
CFD
  • CFD analysis is done to check pressure drops.
  • Further refinements can be done for balancing the circuit – to achieve uniform suction at all the inlets.
  • Pressure drop optimization can be done to reduce the static pressure requirements of the fan.
Checking turbulence
  • Duct entries can be checked for the turbulence