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  • Users: op9
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  1. op9

    Liquid propane fired burners

    I have installed and commissioned a number of large burners on asphalt plants using propane in the liquid form (LP). I have been asked to source a similar fuelled burner of about 13.8 MW for a watertube boiler. I cannot seem to find one. Obviously one difference is that asphalt plant rotary...
  2. op9

    Common exhaust flues

    I have a situation with an existing asphalt plant rotary drier fired with a burner on LPG at 28GJ/Hr (26.5 x 10^6 BTU/hr). This was commissioned by me over 10 yrs ago. To this is to be added another rotary drier to dry RAP (Recycled Asphalt Payment) which is the old pulverized asphalt from old...
  3. op9

    Common exhaust flues

    I have a situation with an existing asphalt plant rotary drier fired with a burner on LPG at 28GJ/Hr (26.5 x 10^6 BTU/hr). This was commissioned by me over 10 yrs ago. To this is to be added another rotary drier to dry RAP (Recycled Asphalt Payment) which is the old pulverized asphalt from old...
  4. op9

    Common Flues

    Hi TBE, Thanks for the response. Would be interested in reading the white paper. However in our case the two systems are dampered off when not in operation. So when the gas fired burner starts the connecting dampers to the RAP system have to be closed and interlocked for the prepurge and will...
  5. op9

    Common Flues

    I have a situation with an existing asphalt plant rotary drier fired with a burner on LPG at 28GJ/Hr (26.5 x 10^6 BTU/hr). This was commissioned by me over 10 yrs ago. To this is to be added another rotary drier to dry RAP (Recycled Asphalt Payment) which is the old pulverized asphalt from old...
  6. op9

    Photoresisistor flame scanner

    Please explain!!! The controller flame relay holds in at >4 microamps and as I said before saturates at around 30 microamps. On a diminishing light source the flame relay drops out at < 4 microamps. There is no adjustment for this. Crude but it works. KISS principle. Rod Nissen. Combustion &...
  7. op9

    Photoresisistor flame scanner

    When covered and not detecting light the resistance of the sensor would be >1 Mohm. It starts passing a holding current of >4microamps at about 230kohm and at max light intensity a current of about 30microamps at 8kohm. Rod Rod Nissen. Combustion & Engineering Diagnostics
  8. op9

    Photoresisistor flame scanner

    Has anyone had practical experience with running long lengths of cable between a photoresistor flame scanner and a burner controller? More specifically a Siemens LAL2.65 and a QRB1 scanner. The documents say it can be run up to 200mtrs with RG62 coax. I have had some other advice not to use it...
  9. op9

    Pumps for Hot oil or thermal fluid.

    Salmson is actually French...if you do a search. A German company Wilo now owns them. Think they may now manufacture all over including "Asia". Rod Nissen. Combustion & Engineering Diagnostics
  10. op9

    Pumps for Hot oil or thermal fluid.

    I have used SIHI pumps for this application many times. I have now been offered a SALMSON pump. The oil I am pumping is only at 200degC max. The pump curves for these two brands are almost identical as is their model numbers. The SIHI pump uses multiple lip seals bearing on a SS wear sleeve...
  11. op9

    Dungs gas valve problems

    As far as I am aware it is posted in another forum only, which may have people who have had exposure to a similar problem. If you can't help, why is that of your concern? Rod Nissen. Combustion & Engineering Diagnostics
  12. op9

    Problems with Dungs Gas valve

    My problem is with a Dungs MVD 515/5 (1 1/2") gas valve here in Australia. It replaced an old 215/5 which had a burnt out rectifier board. Local agent did not have the same so supplied the higher pressure rated version. Has a 110VAC coil for this particular site. It worked for about a month...
  13. op9

    Dungs gas valve problems

    My problem is with a Dungs MVD 515/5 (1 1/2") gas valve here in Australia. It replaced an old 215/5 which had a burnt out rectifier board. Local agent did not have the same so supplied the higher pressure rated version. Has a 110VAC coil for this particular site. It worked for about a month...
  14. op9

    Auto ignition temp of natural gas

    I meant just under 600degC for the auto ignition temp of nat gas. Thanks, Rod Rod Nissen. Combustion & Engineering Diagnostics
  15. op9

    Auto ignition of Natural Gas

    I meant just under 600degC for the auto ignition temp of nat gas. Thanks, Rod Rod Nissen. Combustion & Engineering Diagnostics
  16. op9

    Auto ignition temp of natural gas

    In Australia our gas codes allows burners to be fired into a chamber which has reached a minimum temperature of 750degC (1382degF), without flame monitoring. This being well above the auto-ignition temp of nat gas which is just under 500degC. Other gases like propane being slightly less...
  17. op9

    Auto ignition of Natural Gas

    In Australia our gas codes allows burners to be fired into a chamber which has reached a minimum temperature of 750degC (1382degF), without flame monitoring. This being well above the auto-ignition temp of nat gas which is just under 500degC. Other gases like propane being slightly less...
  18. op9

    Pulse firing gas valve

    I am interested in sourcing a manufacturer of gas valves that can be used for an on/off pulse burner system for a brick kiln. I am aware that Kromschroder have the VAS series valves ideally suited for this application....up to 6 pulses/min. However they are only rated to 50kPa. I need a valve...
  19. op9

    Convert propane to natural gas to fire burner

    Hi there, Firstly propane CAN BE AND IS mixed with air to reproduce natural gas. It is called SNG (S for synthetic, simulated, or substitute depending on the gas supplier's particular persuasion!!). I think the proportion is 55% propane, 45% air. The aim is, is to produce a gas with the same...
  20. op9

    Unusual emissions on heavy fuel oil

    Actually years ago I did a gas burner commissioning (butane) on a rotary kiln where they made cenospheres out of ash from the nearby powerstation boilers. Apparently it was a quite lucrative industry as long as the product was "white" as they used it for filler in the plastics industry.Being...

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