technical NOTES

10. Preheater Cyclone Size

During discussion in one of the project on Preheater cyclone sizing & design the
specific requirement given to all suppliers are

• 350 mmwg pressure at fan inlet on guaranteed output – To reduce the PH fan
  specific power consumption as low as possible, 350 mm is the minimum PH
  fan inlet guaranteed draft offered by suppliers for the first time.


• Bigger Sizing of PH Cyclone - To have lower volumetric loading < 1 tpd/m3 than
  standard and also better future potential on capacity & efficient heat transfer
  will lead to slow and uniform heating of raw mix so that higher calcination can
  be attained in PH tower itself resulting in leaser work for kiln enabling to
  have lower thermal loading inside the kiln and improved refractory life. Also no
  CO and coating in preheater cyclones and risers.
  10.1 Preheater Cyclone Size- Standard V/S. Offered Sizing

Pre-Heater Cyclone Size

Data Unit S1 S2 S3 S4

Standard Sizing (Double Insulation Estimated)

Preheater cyclone Volume

(Cylinder + Cone) Effective

(Approx.)

m^38359889872008052

Preheater (Cyclone + Riser +

Meal Chutes) surface area m2^97051021185818648

Supply + Fabrication Weight

(Approx.) Ton^1938178412761384

Concrete Volume (RCC -

Approx.) m3^927286251060314312

Preheater cyclone loading at

Guaranteed output tpd/m3 0.9 0.8 1.0 0.9

Pressure Drop Across PH mmWG 381 529 456 412

Offered Sizing

Preheater Cyclone Dimensions mm

2 x 8200

2 x 9000

2 x 9000

2 x 9000

2 x 9000

2 x 9000

4 x 7680

2 x 9500

2 x 9500

2 x 9500

2 x 9500

2 x 9500

4 x 8340

2 x 9180

2 x 9690

2 x 9690

2 x 10240

2 x 10240

2 x 7600

2 x 8000

2 x 8600

2 x 8600

2 x 8600

2 x 8600