The economiser outlet links are taken form the ends of header and they join to form a single lead.
Just before these join the Furnace Inlet headers on left and right side, they are again bifurcated.
As there is no Drum in once through design the feed water after economiser directly enters the
Furnace wall system / evaporators.
Details of Economiser System
Description No off Size thickness Matl. Spec Design Pr. Design/temp
kg/cm.sq deg. C
Eco inlet link 1 457.2 55.5 SA 106 C 306 293.7
Eco. inlet header 1 457.2 79.4 SA106 C 301 321.7
Eco Coils 812 44.5 8 SA210 C 301 358.6
Eco Outlet header 1 508 101.6 SA 335 P22 297.9 375.6
Eco outlet link 2 508 71.6 SA106 C 297.9 348.8
Total Pressure drop calculated in economiser system is around 5.5 kg/cm. sq.
Total Pressure drop calculated in evaporator system is around 14.4 kg/cm.sq.
Total design Pressure calculated is = 1.05 x working pressure.
Pressure Parts design should be in line with IBR ( Indians Boiler Regulation )
There should be provision of Erosion and thinning allowance of 1.00 mm and 10% respectively.
- Above drawing shows the position of ECO coils , headers etc in the system. Economiser
erection will be done after RH coil , 2nd Pass roof erection . The same will be explained
at a later stage.
P.S If you are looking to earn few legitimate extra money from the comfort of your home then please click on the link given below
This article surely helps for all.
ReplyDeleteeco boilers