BIO, BIOA, ZIO - Combustion 911

Selection > Calculating the burner length > Burners with burner attachment tube
18
L1
L O
L2 L 1-2
Legend
L1 = Burner tube length
L2 = Position of burner head
LO = Furnace wall thickness
L 1-2 = Attachment tube length (distance
from burner head to burner tube
end)
Calculation example
Attachment tube lengths (L 1-2 ):
BIO, BIOA, ZIO
H burner head
R burner head
[mm]
[mm]
50 115 115
65 115 115
80 165 165
100 165 165
125 215 215
140 265 265
165 265 165
200 315 215
Position of the burner head (near the interior furnace wall):
L2 = L O ± 50 mm
The burner tube length (L1) is calculated by adding the position of the burner
head (L2) to the attachment tube length (L 1-2 ):
L1 = L2 + L 1-2
Example
Desired flame shape = H (long) – see [Field of application – p. 13].
Selected burner with 90 kW capacity = BIO 65.
Attachment tube length (L 1-2 ) = 115 mm.
Furnace wall thickness L O = 300 mm.
Calculate shortest length L2:
L2 = L O - 50 mm = 300 - 50 mm = 250 mm.
Compare L2 (here 250 mm) with standard lengths (35, 135, 235, 335 mm, etc.).
Select next longest standard length L2: L2 = 335 mm.
Calculate the related burner tube length (L1):
L1 = L2 + L1-2 = 335 mm + 115 mm = 450 mm.
BIO, BIOA, ZIO · Edition 05.10