{"id":1255,"date":"2026-04-28T07:10:00","date_gmt":"2026-04-28T07:10:00","guid":{"rendered":"https:\/\/rtooxidizer.com\/?post_type=product&p=1255"},"modified":"2026-04-28T07:12:16","modified_gmt":"2026-04-28T07:12:16","slug":"ultra-low-nox-burners","status":"publish","type":"product","link":"https:\/\/rtooxidizer.com\/zh_hk\/product\/ultra-low-nox-burners\/","title":{"rendered":"Ultra-Low-NOx Burners"},"content":{"rendered":"
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Ultra-Low-NOx Burners for Strict Emissions Compliance<\/h2>\n

Ever-power ultra-low-NOx burners combine deep staged combustion, internal flue gas recirculation and multi-porous matrix nozzles to deliver NOx emissions below 30 mg\/Nm3 on natural gas, with single-digit ppm performance available on selected duties. Each unit is engineered for the specific firebox, fuel composition and licence limit, and has been proven in process heaters, package boilers, ethylene cracking furnaces and ammonia reformers across Australia, North America and the European Union.<\/p>\n

\"Ultra-low-NOx<\/div>\n

How Ever-power Achieves Ultra-Low-NOx Emissions<\/h2>\n

Thermal NOx forms exponentially with peak flame temperature. Our ultra-low-NOx burners attack that physics on three fronts: they spread combustion across staged zones to lower peak temperature, they recirculate inert flue gas back into the flame to dilute oxygen, and they use a multi-porous matrix nozzle to produce a uniform, low-momentum flame that resists hot spots.<\/p>\n

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Deep Staged Combustion<\/div>\n
Primary, secondary and tertiary air zones lower peak flame temperature by up to 250 \u00b0C versus conventional designs.<\/div>\n<\/div>\n
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Flue Gas Recirculation<\/div>\n
Internal FGR draws inert flue gas back into the throat, reducing oxygen partial pressure and suppressing thermal NOx formation.<\/div>\n<\/div>\n
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Multi-Porous Matrix Nozzle<\/div>\n
A precision-machined matrix distributes fuel across hundreds of small ports, producing a uniform low-momentum flame.<\/div>\n<\/div>\n
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Lean Premix Architecture<\/div>\n
For surface combustion duty, lean premix below the lower flammability limit reduces NOx to single-digit ppm.<\/div>\n<\/div>\n<\/div>\n

Performance Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nUltra-Low-NOx (FGR)<\/th>\nSurface Combustion<\/th>\nTest Reference<\/th>\n<\/tr>\n<\/thead>\n
NOx (natural gas)<\/td>\n\u2264 30 mg\/Nm3<\/td>\n\u2264 9 ppm<\/td>\n3% O2, dry<\/td>\n<\/tr>\n
CO<\/td>\n\u2264 50 mg\/Nm3<\/td>\n\u2264 25 ppm<\/td>\n3% O2, dry<\/td>\n<\/tr>\n
Thermal capacity<\/td>\n100 to 12,000 kW<\/td>\n50 to 3,500 kW<\/td>\nPer unit<\/td>\n<\/tr>\n
Turndown<\/td>\n10:1<\/td>\n8:1<\/td>\nModulating<\/td>\n<\/tr>\n
Excess air<\/td>\n10 to 15%<\/td>\n5 to 10%<\/td>\nAt full load<\/td>\n<\/tr>\n
Sound pressure<\/td>\n\u2264 85 dB(A) at 1 m<\/td>\n\u2264 78 dB(A) at 1 m<\/td>\nFree-field<\/td>\n<\/tr>\n
Fuel options<\/td>\nNG, LPG, refinery gas<\/td>\nNG, LPG, hydrogen blends<\/td>\nSingle or dual<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Configurations for Every Furnace Layout<\/h2>\n
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Bottom-Fired<\/strong><\/p>\n

Vertical upward flame for vertical tubular heaters in steam reforming and hydrogen production. Uniform tube wall temperature reduces coking and tube failure.<\/p>\n<\/div>\n

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Side-Fired<\/strong><\/p>\n

Horizontal flame for reformers and dehydrogenation furnaces. Compact footprint and excellent radiant heat distribution to process tubes.<\/p>\n<\/div>\n

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Radiant Wall<\/strong><\/p>\n

Flat radiant flame embedded in the furnace wall, used in ethylene and hydrogen conversion furnaces where flux uniformity matters most.<\/p>\n<\/div>\n

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Top-Fired<\/strong><\/p>\n

Vertical downward flame for ammonia synthesis converters and large primary reformers. Optimised for high heat flux at the catalyst bed inlet.<\/p>\n<\/div>\n<\/div>\n

NOx Reduction Strategies Compared<\/h2>\n
\n\n\n\n\n\n\n\n\n\n
Technology<\/th>\nNOx Range<\/th>\nCapex<\/th>\nFootprint<\/th>\n<\/tr>\n<\/thead>\n
Conventional burner<\/td>\n150 to 250 mg\/Nm3<\/td>\nBaseline<\/td>\nSmall<\/td>\n<\/tr>\n
Low-NOx burner<\/td>\n80 to 120 mg\/Nm3<\/td>\n+15%<\/td>\nSmall<\/td>\n<\/tr>\n
Ultra-low-NOx burner with FGR<\/td>\n25 to 50 mg\/Nm3<\/td>\n+30%<\/td>\nMedium<\/td>\n<\/tr>\n
Surface combustion ULN<\/td>\n9 to 20 ppm<\/td>\n+45%<\/td>\nMedium<\/td>\n<\/tr>\n
Burner + SCR add-on<\/td>\n\u2264 10 mg\/Nm3<\/td>\n+90%<\/td>\nLarge<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\"Combustion<\/div>\n

Industries and Typical Applications<\/h2>\n
\n
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Oil refining:<\/strong> crude heaters, vacuum heaters, hydrocracker charge heaters<\/div>\n<\/div>\n
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Petrochemicals:<\/strong> ethylene crackers, propane dehydrogenation<\/div>\n<\/div>\n
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Hydrogen and ammonia:<\/strong> primary reformers, secondary reformers<\/div>\n<\/div>\n
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Power and cogen:<\/strong> auxiliary boilers, HRSG duct firing<\/div>\n<\/div>\n
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Food and dairy:<\/strong> spray dryers, package boilers, evaporators<\/div>\n<\/div>\n
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Pulp and paper:<\/strong> lime kilns, recovery boilers, dryer hoods<\/div>\n<\/div>\n<\/div>\n

Why Choose Ever-power Ultra-Low-NOx Burners<\/h2>\n
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Validated CFD Models<\/div>\n
Each design is verified against full-scale combustion test data so emissions guarantees translate directly from rig to field.<\/div>\n<\/div>\n
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Hydrogen-Ready<\/div>\n
All ULN burners are engineered for up to 30% hydrogen blends, with 100% H2 versions available on request.<\/div>\n<\/div>\n
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Robust Mechanical Build<\/div>\n
High-grade alloy components, ceramic-fibre tile insulation and stress-relieved welds for thermal cycling and long service life.<\/div>\n<\/div>\n
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Performance Guarantees<\/div>\n
Written NOx, CO and noise guarantees backed by FAT and SAT, with on-site tuning until limits are met.<\/div>\n<\/div>\n<\/div>\n

More about the people, plants and accreditations behind these burners is on our company page<\/a>.<\/p>\n

Australian Project Highlight<\/h2>\n
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Kwinana Industrial Area, Western Australia<\/div>\n

A heavy chemicals operator in Kwinana faced a tightened DWER licence reducing the NOx limit on their auxiliary boiler from 200 to 80 mg\/Nm3. Ever-power supplied two 8 MW ultra-low-NOx burners with internal FGR. Site acceptance testing confirmed 28 mg\/Nm3 NOx and 18 mg\/Nm3 CO at full load, well inside the new licence.<\/p>\n

\n
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NOx achieved<\/div>\n
28 mg\/Nm3<\/div>\n<\/div>\n
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Licence headroom<\/div>\n
65%<\/div>\n<\/div>\n
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Retrofit downtime<\/div>\n
12 days<\/div>\n<\/div>\n
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Run hours since<\/div>\n
14,000+<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Frequently Asked Questions<\/h2>\n
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\nWhat NOx level qualifies as ultra-low?<\/summary>\n

In Australia, ultra-low-NOx generally means below 30 mg\/Nm3 at 3% O2 on natural gas. North American specifications often quote 9 ppm or lower for surface combustion duty. Both targets are within Ever-power capability.<\/p>\n<\/details>\n

\nDo I still need an SCR if I install an ultra-low-NOx burner?<\/summary>\n

For most Australian licence conditions, no. SCR is generally only required where a permit demands single-digit ppm output. Surface combustion ULN burners can also reach that target without ammonia injection.<\/p>\n<\/details>\n

\nCan ultra-low-NOx burners run on hydrogen blends?<\/summary>\n

Yes. Standard ULN packages are validated for up to 30% hydrogen by volume. Higher fractions need a different mixer and flame arrestor specification, which is available on request.<\/p>\n<\/details>\n

\nHow does internal FGR differ from external FGR?<\/summary>\n

Internal FGR uses the burner’s own aerodynamics to entrain flue gas into the throat, requiring no fan or external duct. External FGR uses a recirculation fan and ducting, achieves higher dilution rates and slightly lower NOx, but adds capex and footprint.<\/p>\n<\/details>\n

\nWill an ultra-low-NOx burner reduce thermal efficiency?<\/summary>\n

No. Excess air is held at 10 to 15% on FGR designs, similar to a tuned conventional burner. Most retrofits actually improve net thermal efficiency by 0.5 to 1.5% due to better flame uniformity and lower exit temperature.<\/p>\n<\/details>\n

\nWhat is the typical service life?<\/summary>\n

A correctly maintained ultra-low-NOx burner has a mechanical life of 20 years or longer. Wear parts such as the gas tip set and pilot are inspected during the annual outage and replaced as needed.<\/p>\n<\/details>\n

\nCan existing burners be retrofitted to ultra-low-NOx?<\/summary>\n

In many cases yes. We assess the existing register, throat geometry and BMS, then provide a retrofit kit. Where the firebox is too small, a complete burner replacement is recommended.<\/p>\n<\/details>\n<\/div>\n

Request Your ULN Burner Datasheet<\/h2>\n
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Hit your NOx target without bolt-on abatement.<\/div>\n

Send us the firebox drawing, fuel composition and licence limit. We will return a datasheet showing predicted NOx, CO, flame envelope and indicative price within five working days.<\/p>\n

Email sales@rtooxidizer.com<\/a>
\nExplore Ever-power Solutions<\/a><\/div>\n<\/div>\n