Dear Friends
Any body having information about pyro jet borner i have some question
1. what is the normal position for this burner inside kiln.
2. how can we increase and decrease its burning zone or coating area.
3.what swirl and jet air is normal.
pls reply me soon .
Dear Mr. Shahzad
To answer you i need what below :-
- Type of fuel
- Kiln nominal dia
- Q m/h of your primary air with p and rpm
- type of grate cooler and the Nm3/ kg clinker of
- fuel ratio Main burner and pc
- Temp of oil at the burner ( if oil )
- kiln rotation ( direction )
- swirl air rotation
- kiln t/day production
- O2 at the kiln inlet
- tip clearance for axial air and for swirl air ( circular gaps )
- tip out side dia
- primary oil Q and p and secondary oil too with your kiln long
- type of cement .
Regards
ILA
-
hello
i am sending u burner data which i have
- Type of fuel > coal
- Kiln nominal dia > 4.2
- Q m/h of your primary air with p and rpm >?
- type of grate cooler and the Nm3/ kg clinker of >2.0>iknpendulum
- fuel ratio Main burner and pc >40-42main 58-60cal
- Temp of oil at the burner ( if oil ) coal
- kiln rotation ( direction ) >from cooler anti clockwise
- swirl air rotation ?
- kiln t/day production >4400 upgradtion before 3800t/day
- O2 at the kiln inlet >less than 3
- tip clearance for axial air and for swirl air ( circular gaps ) ?
- tip out side dia ?
- primary oil Q and p and secondary oil too with your kiln long ?
- type of cement >opc
-kiln rpm max >4.0
- kiln length >64m
- swirl air>120mbar
- jet air.>715mbar
- coal convaying air >21mbar
this data i have yet i am trying to find but i didnt find in manual.
thanks for reply
Dear Mr. Shahzad
coal firing involves a single pipe burner through which the mill carrying air together with entrained coal are injected at a
tip velocity of approximately 80M/sec. Tip velocity must always be substantially greater than the flame propagation velocity
which may be up to 25M/sec. Flames produced by coal nozzle velocities in excess of 80M/sec are susceptible to severe
instabilities. The pipe is usually narrowed near the tip to minimize parasitic pipe losses and to convert the flow into the desired
static pressure. For indirect firing, multi-channel burners of various designs are employed. One annulus is used for conveying
pulverized fuel from the mill and one or more separate streams are used to supply primary air for controlling the flame
PF conveying air = 3.8%
Total primary air (axial+swirl) = 4.3 %
Axial velocity, M/sec = 400
Swirl velocity, M/sec = 150
When the angle of burner is being adjusted one must know that the heat radition from material bed to the fuel will speed up the fuel preperation and thus combustion , the more the burner is directed to the material bed , the eccess of secondary air which is not participtate in combusition at that point and which would draw the heat from materials and delay the sentring process , the reaction of fuel and econdary air in case of flame to close to material will be confinde to the remaining ariea of flame coning surface which will slowing down the combusiton .
The burner must be set at the small angle to the kiln axies and sligtly directed to the material
My best sugustion to use the regtangular sectors method to set your burner position inside the kiln .
Best regards
ILA