Burner Piping Elevation

There should be almost no differences except for the lengths of various pieces of pipe and the number of elbows. A fuel and/or feed water pump may need to be upsized on account of increased head.

dear sir,

we have changed elevation of FG/FO/MP line from bottom to 5 ft.earlier it was in the bottom platfom.due to this elevation pressure drop of this lines being increased. is this PD doesnt effet on burner duty.

A full answer would require dimensioned drawings of both situations, or a fully detailed description.

pls find below mensioned data as you required for calculations:

1st situation:

FG/FO/MP Line Elevation :Ground level

Pressure Drop : 50 mmwc

Burner Heat Duty :2.82

2 nd situation :

FG/FO/MP Line Elevation :5 Ft above from Ground level

PD : data not available exactly how much woud been increased(if reqired assume any value)

Remaing data has been same in second situation.

if any more data required ple let me soon.

I'm sorry to say so, but that is far from full detail.

i need to know how to calculate the burner heat duty.will you pls tell me roughly the basis of calculations,equations,data required

Take the inverse of the square of the elevation change, times the altitude change, divided by any values as original wherever required.

i dont understand exactly ,will you do the calculations with below mensioned data as you required for calculations:

1st situation:

FG/FO/MP Line Elevation :Ground level

Pressure Drop : 50 mmwc

Burner Heat Duty :2.82

2 nd situation :

FG/FO/MP Line Elevation :5 Ft above from Ground level

PD : data not available exactly how much woud been increased(if reqired assume any value)

Remaing data has been same in second situation.

if any more data required ple let me soon.

In the above issue ,Due To elevation change PD will change.Is the pressure drop will effect on any process parameter like burner duty and heat distribution.if it is yes how?

If the elevation changed what are the main parameters will change.

5 feet of head = 2.17 PSI.

Is there any calculation for above mensioned value or any basis.

The conversion factor for psi to feet of head (60°F water) is 1 psi = 2.31 feet. This factor varies with the density of the liquid. Thus 5 feet ÷ 2.31 ≈ 2.17 psi. For oil it will be something like 1 psi = 2.8 feet.

Depending on where the equipment is in relation to the piping, raising the pipe by 5 feet could either increase or decrease various pressure drops involved. That is why a dimensioned drawing, or a FULL description, is required.

You haven't explained FG and FO (fuel gas, fuel oil?; is this a dual-fueled boiler?) What units is the 2.85 burner heat requirement?

You should get an engineer involved who knows what constitutes sufficient information for doing calculations, and can then ask correct questions.

Yes this duel(FG and FO) fired heater and the unit of Heat duty is 2.82 MMkcal/hr.

For the FG line, it should be at most 5 feet shorter or longer overall; this should make no significant difference in the FG pressure drop.

For the FO line, the length won't make much difference. If there is a net difference in elevation (which may or may not be true, depending on exact specifics), this could increase/decrease the FO pressure drop by about 2 psi. That might make a difference , but not much.

For the MP steam line, ±5 feet of length should be insignificant.

The burner duty and fuel requirement will not change.

You haven't yet mentioned feedwater piping. Here, moving anything 5 feet up or down could be really significant.

Once again, correct and complete details are essential, but have not yet been provided.

pls let me know exactly what data you need. then i'll provide

A dimensioned drawing would be best, as mentioned several times previously.

Is this the "burner heat duty" that you are concerned with?

Heat Duty: Total furnace heat duty is the sum of heat transferred to all process streams, including auxiliary services such as steam superheaters. Amount of heat duty affects the selection of type and configuration of heater.

If so then there is much more to this than simply worrying about the effect of 5 ft of additional piping. You have changed where the flame's radiant/convective energy hits the boiler tubes and therefore the overall performance of the boiler. Sounds like your question is beyond the reach of a process/piping designer/engineer and requires the paid assistance of a competent boiler engineer or you'll be going through lots of design iterations. Have you contacted the burner or boiler manufacturer?

No.I tried alone

Then a phone call to the boiler manufacturer's Technical Helpline is overdue.