furakh shahzad
4 posts
TimePosted 13/02/2010 09:41:16

khd pyro jet burner

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 .

 

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ILA
49 posts
TimePosted 13/02/2010 14:40:54
ILA says

Re: khd pyro jet burner

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

-

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furakh shahzad
4 posts
TimePosted 14/02/2010 15:33:16

khd pyro jet burner

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

 

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ILA
49 posts
TimePosted 14/02/2010 18:18:38
ILA says

Re: khd pyro jet burner

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

 

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