FM Series Low and Medium Velocity Gas, Oil and Combination Burners Bulletin 1.4 February 2012 These large capacity burners utilise a series of different stabilisers in common bodies to provide a wide variety of application capabilities. The burner performance may be optimised over a range of conditions by selecting the appropriate baffle / flame stabiliser for the required duty. For example, combustion air pressures as low as 10 mbar can be accommodated without compromising mixing characteristics. These properties are important, for example, where low CV gases are to be burnt. The burners are available in three design styles: The RFM burner comprises of a refractory air baffle of a simple design that is useful for applications where simplicity and ruggedness are important. The RFM can accept high furnace temperatures, with air preheat temperatures up to 350°C (standard) and is for gas firing only. The burner capacity is based on the air flow resulting from the air temperature and pressure drop across the baffle. A choice of baffle bodies in each body is available – see capacity chart for details. The AFM burner has been developed for use with gas and light oil and offers an alternative to the RFM series, where combustion air pressures are low, for applications where burner turndown and air/gas mixing are important. Each burner air baffle is individually designed to suit the application. The AFM uses a refractory lined alloy baffle and is for gas or light oil firing. The baffle can resist high furnace temperatures and accept air preheat temperatures up to 350°C (standard). The burner capacity is based on the air flow resulting from the air temperature and pressure drop across the baffle. A choice of baffle bodies in each body is available – see capacity chart for details. The RFM and AFM burners are available with two gas lance options: the “A” type gas lance is a simple tubular construction whilst the “B” type gas lance uses a moveable gas disc which is used to give on site adjustment of flame characteristics. The AFM series oil atomiser uses medium pressure compressed air and is easily inserted and withdrawn along the centre of the “B” type gas lance for cleaning and maintenance. The SFM burner incorporates a swirl type flame stabiliser that has been developed primarily for use with gas or liquid fuels. Gaseous fuel is supplied through the centre lance to a number of fuel nozzles, arranged concentrically around the lance. The burner is designed for high or low pressure gas, light oil or dual fuel firing. Maximum furnace temperatures of up to 1,200°C are acceptable with preheat temperatures up to 350°C – refer to FivesNA for applications with higher temperatures. Between the fuel lance and gas nozzles is a spinner assembly to rotate the combustion air. Also, the air inlet of the burner incorporates a spinner vane to impart a rotation to the incoming air to influence the flame swirl and length. Air Preheat Temperatures All standard burners are designed for preheated combustion air with temperatures up to 350°C. Special burners suitable for air preheats up to 600°C are available – contact FivesNA. At air preheat temperatures up to 250°C; the burner body may need to be externally insulated. Over 250°C, the burner body is provided with internal insulation, resulting in typical body surface temperatures of up to 70°C. It should be noted that the air inlet will be restricted and it may be necessary to use a burner one size larger – please refer to FivesNA. In all cases where air is preheated, it is the duty of the purchaser to ensure that the air ducting and burner body are suitably guarded for personnel protection. FM Series – Features ■ Low or medium velocity burner versions ■ Suitable for liquid or gaseous fuels ■ Simple conversion from gas to oil or oil to gas – no lance removal required. ■ Low air and gas pressures ■ Standard air preheat temperatures to 350°C ■ Option of air preheat temperatures to 600°C ■ Excellent flame stability Fives North American Combustion UK, Ltd. Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552 email: [email protected] www.fivesgroup.com/fivesna Fives North American Combustion UK, Ltd.
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FM Series Low and Medium VelocityGas, Oil and Combination Burners
Bulletin 1.4
February 2012
These large capacity burners utilise a series of differentstabilisers in common bodies to provide a wide varietyof application capabilities. The burner performance maybe optimised over a range of conditions by selecting theappropriate baffle / flame stabiliser for the required duty.For example, combustion air pressures as low as 10mbar can be accommodated without compromisingmixing characteristics. These properties are important,for example, where low CV gases are to be burnt.
The burners are available in three design styles:The RFM burner comprises of a refractory air baffle ofa simple design that is useful for applications wheresimplicity and ruggedness are important.
The RFM can accept high furnace temperatures, withair preheat temperatures up to 350°C (standard) and isfor gas firing only. The burner capacity is based on theair flow resulting from the air temperature and pressuredrop across the baffle. A choice of baffle bodies in eachbody is available – see capacity chart for details.
The AFM burner has been developed for use with gasand light oil and offers an alternative to the RFM series,where combustion air pressures are low, for applicationswhere burner turndown and air/gas mixing areimportant. Each burner air baffle is individually designedto suit the application.
The AFM uses a refractory lined alloy baffle and is forgas or light oil firing. The baffle can resist high furnacetemperatures and accept air preheat temperatures up to350°C (standard). The burner capacity is based on theair flow resulting from the air temperature and pressuredrop across the baffle. A choice of baffle bodies in eachbody is available – see capacity chart for details.
The RFM and AFM burners are available with two gaslance options: the “A” type gas lance is a simple tubularconstruction whilst the “B” type gas lance uses amoveable gas disc which is used to give on siteadjustment of flame characteristics.
The AFM series oil atomiser uses medium pressurecompressed air and is easily inserted and withdrawnalong the centre of the “B” type gas lance for cleaningand maintenance.
The SFM burner incorporates a swirl type flamestabiliser that has been developed primarily for use withgas or liquid fuels.
Gaseous fuel is supplied through the centre lance to anumber of fuel nozzles, arranged concentrically aroundthe lance. The burner is designed for high or lowpressure gas, light oil or dual fuel firing. Maximumfurnace temperatures of up to 1,200°C are acceptablewith preheat temperatures up to 350°C – refer toFivesNA for applications with higher temperatures.
Between the fuel lance and gas nozzles is a spinnerassembly to rotate the combustion air. Also, the air inletof the burner incorporates a spinner vane to impart arotation to the incoming air to influence the flame swirland length.
Air Preheat TemperaturesAll standard burners are designed for preheatedcombustion air with temperatures up to 350°C. Specialburners suitable for air preheats up to 600°C areavailable – contact FivesNA.
At air preheat temperatures up to 250°C; the burnerbody may need to be externally insulated. Over 250°C,the burner body is provided with internal insulation,resulting in typical body surface temperatures of up to70°C. It should be noted that the air inlet will berestricted and it may be necessary to use a burner onesize larger – please refer to FivesNA.
In all cases where air is preheated, it is the duty of thepurchaser to ensure that the air ducting and burnerbody are suitably guarded for personnel protection.
FM Series – Features� Low or medium velocity burner versions� Suitable for liquid or gaseous fuels� Simple conversion from gas to oil or oil
to gas – no lance removal required.� Low air and gas pressures� Standard air preheat temperatures
to 350°C� Option of air preheat temperatures
to 600°C� Excellent flame stability
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD EnglandTel +44 (0) 1902 891200 Fax +44 (0) 1902 895552email: [email protected] www.fivesgroup.com/fivesna
Fives North American Combustion UK, Ltd.
630 556 879 378 597635 756 1195 514 812640 988 1562 671 1062645 1250 1976 849 1343650 1544 2441 1049 1659655 1868 2953 1270 2007660 2223 3514 1511 2389665 2609 4125 1773 2801670 3025 4782 2056 3251860 2964 4686 2015 3186865 3478 5499 2364 3738870 4034 6378 2742 4336875 4631 7322 3148 4978880 5269 8330 3582 5664885 5948 9404 4044 6393890 6668 10543 4533 71688100 8232 13015 5597 88498110 9961 15749 6772 107078120 11854 18742 8059 12742
Burner Size Baffle Size Combustion Air Flows (Nm3/h)Baffle Dp (mbar) at 15°C Baffle Dp (mbar) at 350°C
10 25 10 25
FlameLength(mm)
Specifications and Capacities
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552
FivesNA 02/2012 FM
Page 2Bulletin 1.4
1. CapacitiesThe table below gives the air volume in Nm³/h atpredefined pressures and temperatures. It identifiesthe physical size of the burner baffle related to thisair flow, temperature and pressure drop. There areseveral options per body size with the maximum airpressure drop at 25 mbar.
For sizing a baffle, take the required air flow inNm³/h, the air temperature and the pressure dropand use this data to select the nearest baffle andbody size. For other air temperatures, the pressuredrop and volume can be re-calculated using thetable shown.
2. Burner TurndownA turndown of up to 10:1 can be expected whenusing Natural gas – please refer to FivesNA forother fuels.
3. Gas PressureThe burner gas pressure required depends on thegas lance used, the type of gas and gas volume –please refer to the Gas Pressure Table on page 5.
Capacities and specifications
RFM Series Low and Medium Velocity Gas Burner with Refractory Baffle
Note: Values given above are based on a flame temperature of 1400°C and a discharge velocity of 50m/s.
4. Discharge VelocitiesThe burner discharge velocity results from the totalvolume of burner exit gases at a given temperatureand the burner tile discharge opening.
The FM series burners, with the exception of theFM 0, do not employ conventional tiles and thesehave to be formed in the furnace wall refractories.
Since the tile design will depend on the exhaustvelocity required, differing outlet velocities can bechosen. However, discharge velocities higher than80 m/s are not recommended because of theincreased noise levels.
Burner tiles can be supplied by FivesNA on specialrequest.
5. Flame lengthBurner flame lengths are affected by manyoperational parameters such as burner duty, airtemperature and baffle size etc. The values shownon the table below are given as a guide only.
RFMG 1
RFMG 2
RFMG 3
RFMG 4
RFMG 5
RFMG 6
RFMG 7
1800
2000
2300
2600
3000
3800
4500
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552
FivesNA 02/2012 FM
Page 3Bulletin 1.4
01 962 1178 654 80002 1283 1571 872 106803 1603 1963 1089 133411 1924 2356 1308 160112 2244 2748 1525 186813 2565 3141 1743 213521 3206 3926 2179 266922 3257 4319 2398 293623 3847 4711 2615 320231 4489 5497 3052 373732 4809 5889 3269 400333 5130 6282 3487 427141 5771 7068 3923 480542 6412 7853 4359 533943 7054 8639 4796 587351 7965 9424 5231 640752 8336 10209 5667 694153 8977 10994 6103 747461 10260 12565 6975 854362 11542 14136 7847 961163 12826 15708 8720 1068071 14107 17277 9591 1174672 15389 18847 10463 1281473 16671 20417 11334 13881
Burner Size Combustion Air Flows (Nm3/h)Baffle Dp (mbar) at 15°C Baffle Dp (mbar) at 350°C
20 30 20 30
FlameLength(mm)
Specifications and Capacities
1. CapacitiesThe capacity of the AFM series burner is restrictedby the burner air inlet and the air temperature. Thetable below gives the maximum air volumes throughthe burner per body type. Three standard sizebaffles are available per body type.
2. Burner TurndownA turndown of up to 10:1 can be expected whenusing Natural gas – please refer to FivesNA forother fuels.
3. Gas PressureThe burner gas pressure required depends on thegas lance used, the type of gas and gas volume –please refer to the Gas Pressure Table on page 5.
Capacities and specifications
AFM Series Low and Medium Velocity Gas, Light Oil and Combination Burners withAlloy Baffle
Notes: 1. The above figures may be used to obtain the maximum thermal capacity and represents a 10% excess air level.2. For capacities on oil greater than 12MW, refer to FivesNA as a special fuel lance is required.3. This table is based on an air inlet velocity of 20m/s for cold air and 30m/s for hot air. When using preheated combustion air, the bafflehas to be calculated for the maximum capacity and given air pressure drop. The pressure drops for preheated air are indications only.
4. Discharge VelocitiesThe burner discharge velocity results from the totalvolume of burner exit gases at a given temperatureand the burner tile discharge opening.
The FM series burners, with the exception of the FM0, do not employ conventional tiles and these have tobe formed in the furnace wall refractories.
Since the tile design will depend on the exhaustvelocity required, differing outlet velocities can bechosen. However, discharge velocities higher than80 m/s are not recommended because of theincreased noise levels. Burner tiles can be suppliedby FivesNA on special request.
5. Flame lengthBurner flame lengths are affected by manyoperational parameters such as burner duty, airtemperature and baffle size etc. the values shown onthe table below are given as a guide only.
AFM
AFM
AFM
AFM
AFM
AFM
AFM
AFM
1400
1800
2000
2300
2600
3000
3800
4500
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552
FivesNA 02/2012 FM
Page 4Bulletin 1.4
SFM 0 1697 1200 1153 815 1300SFM 1 3040 2150 2066 1461 1300SFM 2 5232 3700 3557 2515 1500SFM 3 8485 6000 5769 4079 1700SFM 4 11313 8000 7691 5439 2000SFM 5 14849 15500 10096 7139 2200SFM 6 23334 16500 15865 11218 2400SFM 7 33941 24000 23076 16317 2600
Burner Size Combustion Air Flows (Nm3/h)Baffle Dp (mbar) at 15°C Baffle Dp (mbar) at 350°C*
10 (no spin) 20 (full spin) 10 (no spin) 20 (full spin)
FlameLength(mm)
Specifications and Capacities
1. CapacitiesThe capacity of the SFM series burner is restrictedby the burner air inlet and the air temperature. Thetable below gives the maximum air volumes throughthe burner. The air pressure drop differs between10mbar when the spinner flap is on 90° (low spin)and 20mbar with full spin setting.
2. Burner TurndownA turndown of up to 10:1 can be expected whenusing Natural gas – please refer to FivesNA forother fuels.
3. Gas PressureThe burner gas pressure required depends on thegas lance used, the type of gas and gas volume –please refer to the Gas Pressure Table on page 5.
Capacities and specifications
SFM Series Low and Medium Velocity Gas, Light Oil and Combination Burners withSpinner Baffle
Notes: 1. For oil capacities greater than 12MW, refer to FivesNA as a special fuel lance is required.2.* Internally insulated body.
4. Discharge VelocitiesThe burner discharge velocity results from the totalvolume of burner exit gases at a given temperatureand the burner tile discharge opening.
The FM series burners, with the exception of the FM0, do not employ conventional tiles and these have tobe formed in the furnace wall refractories.
Since the tile design will depend on the exhaustvelocity required, any outlet velocity can bechosen. Discharge velocities higher than 80 m/s arenot recommended because of the increasednoise levels.
Burner tiles can be supplied by FivesNA on specialrequest.
5. Flame lengthBurner flame lengths are affected by manyoperational parameters such as burner duty, airtemperature and baffle size etc. the values shown onthe table below are given as a guide only.
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552
FivesNA 02/2012 FM
Page 5Bulletin 1.4
0 3 5 41 5 17 122 5 12 103 7 12 104 15 30 205 25 45 306 25 25 157 50 70 50
Burner SizeNatural Gas Pressure (mbar)
SFMG**
Gas Pressures
The above figures are given for Natural gas having an SG of 0.6 and a CV of 8320 kcal/Nm³. For alternate gases,please use the following formula to obtain the correct gas supply pressure:
Dp2 = Dp1 x (SG2/SG1) x (CV1/CV2)2
Where: Dp1 = Natural gas differential pressure listed above
Dp2 = Required differential pressure for new gas
SG1 = Specific Gravity of Natural gas (0.6)
SG2 = Specific Gravity of new gas
CV1 = Calorific Value of Natural gas (8320 kcal/Nm³)
CV2 = Calorific Value of new gas
Gas Pressures required at the Burner Body for the RFMG, AFMG and SFMG Burners
Notes: 1.* Figures shown are given at maximum disc opening - add 10mbar for normal operation with disc par tially closed.2 ** Add 15mbar to these figures for good gas distribution with disc par tially closed.3 Special fuel lances for Bio and other low CV gases are available to special order.4 All CVs given are net.
RFMG/AFMG “A” Lance RFMG/AFMG “B” Lance*
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552
FivesNA 02/2012 FM
Page 6Bulletin 1.4Dimensions
Fives North American Combustion UK, Ltd.Heath Mill Road, Wolverhampton WV5 8BD England Tel +44 (0) 1902 891200 Fax +44 (0) 1902 895552
FivesNA 02/2012 FM
Page 7Bulletin 1.4Dimensions
WARNING: The data outlined is for information only and does not form part of any contract. Our policy is one of continuous improvementand we therefore reserve the right to modify specifications or dimensions without prior warning. Situations dangerous to personnel and propertycan develop from incorrect installation and operation of combustion equipment. Fives North American Combustion UK, Ltd urges compliancewith International, National and Local Safety Standards and that installation is carried out by properly qualified personnel.
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