SPECO · COMBUSTION SYSTEMS
Burners &
combustion systems
For asphalt plants and thermal oil heaters.
Explore combustion technologies and specifications by model.

PRODUCT LINEUP
Choose a burner for your application
Select a product to view its features, technical information and model specifications.
ecomasterLow-noise burner for dryers02
EBSHigh-precision electronic intelligent burner03
EBS DLow-NOx burner with exhaust-gas recovery04
EC…RBurner with exhaust-gas recovery05
EIAxial-flow burner for asphalt plants06
EC Multi-FuelPulverized-coal, gas and oil multifuel burner07
EPHot-air burner for thermal oil heaters08
ESAir/steam-atomizing burner for thermal oil heaters09
Gas fuelSupply and control system10
Liquid fuelLight/heavy oil supply and control system11
Air supplyDedicated combustion-air blower system12
Integrated controlIntegrated boiler and burner control system13
Online monitoringContinuous exhaust-gas monitoring system14
Intelligent cloudRemote monitoring, alarms, analysis and equipment management01 / ASPHALT PLANT BURNER
ecomaster
Low-noise burner for dryers
Compressed-air atomization and P.I.D control regulate combustion and dryer temperature.
- Model
- LB-080 – LB-320
- Applicable plant
- Ap1000 – Ap4000
- Atomization method
- Compressed-air atomization

View features, technical data and model specifications
- Flexible control methods allow adjustment of firing rate.
- Its compressed-air atomization, described as unique in Korea, produces a fine fuel mist for near-complete combustion.
- Minimized secondary pollution helps extend filter-bag service life.
- The catalogue states the lowest fuel consumption among Korean burners, saving 1ℓ/Ton compared with conventional burners.
- 100% test operation before shipment prioritizes operating reliability.
- Development
- 1997
- Fuel savings
- 1ℓ/Ton
- Temperature control
- P.I.D · 1℃
- Pre-shipment testing
- 100%
Design and validation documents
ecomaster is presented as Korea's first low-noise dryer burner, with performance and reliability supported by extensive testing.








Main components and tests
Compressed-air atomization technology




Low-noise burner
Compressed-air atomization based on proportional, integral and derivative (P.I.D) variables sprays fuel as a fine mist. An assisted purge system enables precise 1℃ temperature control. The catalogue describes fuel-cost savings as among the best in Korea.
Low noise and low NOx
High-pressure mist atomization ignites ultrafine fuel droplets for efficient combustion and low NOx. Compared with conventional designs, very little tar is generated by incomplete combustion, minimizing secondary pollution from unburned exhaust gases. Filter-bag maintenance costs are reduced; the catalogue describes a nearly halved bag-replacement cycle.
Fuel-saving effect
Ultrafine atomization offers higher combustion efficiency than conventional burners. Expected fuel savings are 1ℓ/Ton compared with conventional burners.
Combustion efficiency and flame control
Combustion efficiency
Mist-form fuel injection raises the aggregate temperature evenly and steadily inside the dryer to produce high-quality asphalt mix.
Nozzle configuration
The catalogue contrasts conventional single-nozzle, pump-pressure atomization with SPECO's compressed-air atomization. Large droplets in the former may cause incomplete combustion, bunker-oil coating of aggregate and tar deposits on filter bags. SPECO's nozzle promotes near-complete combustion and fuel savings.




High-quality asphalt aggregate
Avoiding bunker-C oil coating caused by incomplete combustion helps prevent defects such as asphalt-mix separation. Longer filter-bag life also improves durability and reduces consumable replacement costs.
Flame adjustment
Easy adjustment of firing rate and temperature supports stable temperature control when adding materials such as those used in SMA, enabling high-quality asphalt production.
Models and fuel consumption
Model configuration
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| Model | LB-320 | LB-240 | LB-160 | LB-120 | LB-080 |
|---|---|---|---|---|---|
| Applicable plant | Ap4000 | Ap3000 | Ap2000 | Ap1300 | Ap1000 |
Common specifications
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| Burner type Burner type | High-pressure air-jet type (compressed-air atomization) | Combustion-air blower Combustion fan | Turbo fan |
|---|---|---|---|
| Turndown ratio Turndown ratio (TDR) | 5 : 1 | Compressor set pressure Compressor setting | 9 – 7 kg/cm² |
| Fuel pump Fuel pump | Trochoid pump | Temperature control Control | P.I.D proportional control · 1℃ precision |
A2000 BC OIL consumption — in-house test measurements
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| NO | Mix temperature Mix temp. (aggregate at ambient temperature) | Winter (months 11–3) Winter · 0℃ | Spring/autumn (months 4, 9, 10) Spring & Autumn · 10℃ | Summer (months 5–8) Summer · 30℃ | Asphalt mix type Hot mix type | Remarks Remarks |
|---|---|---|---|---|---|---|
| 1 | 180℃ | 9.61 | 8.87 | 7.19 | SMA, LDPE | LDPE = anti-stripping additive |
| 2 | 170℃ | 8.88 | 7.83 | 6.46 | Hot-mix asphalt | |
| 3 | 160℃ | 7.73 | 6.29 | 5.21 | Hot-mix asphalt | |
| 4 | 150℃ | 7.09 | 5.35 | 4.57 | Hot-mix asphalt | |
| 5 | 140℃ | 6.65 | 4.91 | 3.83 | Warm modified asphalt mix | |
| 6 | 130℃ | 5.31 | 4.67 | 3.49 | Warm modified asphalt mix |
Common specifications follow the burner comparison table in the design documents. Contact sales for detailed model specifications. In-house A2000 test: aggregate moisture 4~5%; catalogue unit ℓ. Actual consumption depends on operating conditions.
02 / ASPHALT PLANT BURNER
EBS
High-precision electronic intelligent burner
A burner for asphalt plants with electronic proportional control and a compact, mobile structure.
- Output range
- 415 – 41,500 kW
- Applicable plant
- 1000 – 6000
- Control
- Electronic proportional control

Fuels: light oil, heavy oil, residual oil and blended oil; natural gas, LPG, biogas and coke-oven gas (custom design), etc. / Dual gas–oil operation
View features, technical data and model specifications
The EBS series is a fourth-generation compact digital burner with electronic proportional control, developed for asphalt plants. It follows European design principles for safety, energy savings, environmental performance and intelligence, with testing for China's particular environments and fuels. Its compact, practical design reduces failures. The catalogue states fuel savings of 5%–12% and electricity savings of up to about 40% through new technologies. It suits both stationary and mobile asphalt plants.
- Turndown ratio 1:10. Electronic proportional calculation provides smooth startup and precise temperature control.
- Compact integrated construction and wheels simplify installation and maintenance. Consolidated fuel piping and control circuits simplify connections and provide a clean layout.
- Low-pressure fuel supply and air/steam atomization accommodate lower-quality oils.
- Fuel and combustion oxygen are metered independently; a programmable controller calculates their ratio to support complete combustion and improve efficiency by 2%.
- Inverter blower control reduces average annual electricity use by 30%–40%. High pressure resistance, adaptability and easy flame control.
- Gas-ring injection meets low-NOx emission requirements.
- Meets European requirements for safety, energy savings, environmental performance and intelligent operation.
- Component protection IP55, with key parts rated IP56–IP67, improves safety and reliability.
Specifications by model
Natural-gas output table
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| Model Model | Output Output (kW) | Gas consumption Gas consumption (Nm³/h) | Valve size Valve train size | Blower motor Fan motor (kW) | Control method Control | Combustion method Combustion | Applicable plant Mixing plant |
|---|---|---|---|---|---|---|---|
| EBS600G | 710-7100 | 71-710 | DN65 | 15 | Electronic proportional control Intelligent digital control Electronic modulation Intelligent digital control | Tangential gas ring Tangential gas ring | 1000 |
| EBS900G | 1060-10600 | 106-1060 | DN80 | 30 | 1500 | ||
| EBS1200G | 1420-14200 | 142-1420 | DN100 | 37 | 2000 | ||
| EBS1800G | 2130-21300 | 213-2130 | DN100 | 45 | 3000 | ||
| EBS2500G | 2780-27800 | 278-2780 | DN125 | 55 | 4000 | ||
| EBS3000G | 3550-35500 | 355-3550 | DN125 | 75 | 5000 | ||
| EBS3500G | 4150-41500 | 415-4150 | DN150 | 90 | 6000 |
Heavy/residual oil output table
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| Model Model | Output Output (kW) | Oil consumption Oil consumption (kg/h) | Blower motor Fan motor (kW) | Oil-pump motor Oil pump motor (kW) | Control method Control | Combustion method Combustion | Applicable plant Mixing plant | |
|---|---|---|---|---|---|---|---|---|
| Heavy oil Heavy oil | Light oil Light oil | |||||||
| EBS600NQ | 710-7100 | 63-630 | 60-600 | 15 | 1.5 | Electronic proportional control Intelligent digital control Electronic modulation Intelligent digital control | Low-pressure atomizing medium Low-pressure atomization | 1000 |
| EBS900NQ | 1060-10600 | 95-950 | 90-900 | 30 | 1.5 | 1500 | ||
| EBS1200NQ | 1420-14200 | 127-1270 | 120-1200 | 37 | 2.2 | 2000 | ||
| EBS1800NQ | 2130-21300 | 190-1900 | 180-1800 | 45 | 2.2 | 3000 | ||
| EBS2500NQ | 2780-27800 | 249-2490 | 235-2350 | 55 | 4 | 4000 | ||
| EBS3000NQ | 3550-35500 | 318-3180 | 300-3000 | 75 | 5.5 | 5000 | ||
| EBS3500NQ | 4150-41500 | 371-3710 | 350-3500 | 90 | 7.5 | 6000 | ||
Natural-gas/heavy-oil/residual-oil output table
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| Model Model | Output Output (kW) | Oil consumption Oil consumption (kg/h) | Gas consumption Gas consumption (Nm³/h) | Valve size Valve train size | Blower motor Fan motor (kW) | Oil-pump motor Oil pump motor (kW) | Control method Control | Combustion method Combustion | Applicable plant Mixing plant | |
|---|---|---|---|---|---|---|---|---|---|---|
| Heavy oil Heavy oil | Light oil Light oil | |||||||||
| EBS600GNQ | 710-7100 | 63-630 | 60-600 | 71-710 | DN65 | 15 | 1.5 | Electronic proportional control Intelligent digital control Electronic modulation Intelligent digital control | Gas: tangential gas ring Oil: low-pressure atomizing medium Gas: tangential ring Oil: low-pressure atomization | 1000 |
| EBS900GNQ | 1060-10600 | 95-950 | 90-900 | 106-1060 | DN80 | 30 | 1.5 | 1500 | ||
| EBS1200GNQ | 1420-14200 | 127-1270 | 120-1200 | 142-1420 | DN100 | 37 | 2.2 | 2000 | ||
| EBS1800GNQ | 2130-21300 | 190-1900 | 180-1800 | 213-2130 | DN100 | 45 | 2.2 | 3000 | ||
| EBS2500GNQ | 2780-27800 | 249-2490 | 235-2350 | 278-2780 | DN125 | 55 | 4 | 4000 | ||
| EBS3000GNQ | 3550-35500 | 318-3180 | 300-3000 | 355-3550 | DN125 | 75 | 5.5 | 5000 | ||
| EBS3500GNQ | 4150-41500 | 371-3710 | 350-3500 | 415-4150 | DN150 | 90 | 7.5 | 6000 | ||
Note: Technical figures are laboratory test values and may vary with operating conditions. Calorific values: natural gas 8600 kcal/Nm³, heavy oil 9600 kcal/kg, light oil 10200 kcal/kg. Contact sales for non-standard fuels and other specifications.
03 / ASPHALT PLANT BURNER
EBS D
Low-NOx burner with exhaust-gas recovery
Combines exhaust-gas recovery and reburning with staged-combustion technology.
- Output range
- 415 – 41,500 kW
- Applicable plant
- 1000 – 6000
- Recovery temperature
- Up to 250℃

Fuels: light oil, heavy oil, residual oil and blended oil; natural gas, LPG, biogas and coke-oven gas (custom design), etc. / Dual gas–oil operation
View features and technical data
The ultra-low-NOx EBS D series was developed using computational fluid dynamics and years of testing. It combines emission-reduction technologies with asphalt exhaust-gas reburning to recover and burn exhaust gases while significantly reducing NOx. Optimized oxygen and carbon-monoxide levels support strict environmental requirements and economical operation. Flame shape can be adjusted in real time for different combustion chambers.
Uses V-shaped wind-tunnel combustion, low-oxygen secondary combustion, wind-tunnel reburning and vacuum internal recirculation, combined with zoned oxygen ratios and intersecting staged combustion. It aims to reduce NOx and CO with no or minimal additional energy consumption.
- Independent asphalt exhaust-gas and fuel passages with swirling flow minimize emissions.
- Independent digital calculation and control of fuel, air and exhaust gas enable precise ratio adjustment.
- A movable integrated design improves maintenance access.
- Recovers hot air or exhaust gas up to 250℃ to save fuel.
- Available for standards including China's CSEI, European EN and Russia's EAC.
- Optional NOx emission levels: <30 / <50 / <80 / <120 mg/m³.
- Optional NOx emission levels
- <30 / <50 / <80 / <120 mg/m³
- Recovered air/exhaust gas
- Up to 250℃
Contact sales for detailed model specifications and application conditions.
04 / ASPHALT PLANT BURNER
EC…R
Burner with exhaust-gas recovery
Uses independent passages and digital ratio control, with integrated or separate configurations available.
- Output
- See model specification tables
- Applicable plant
- 500 – 6000
- Configuration
- Integrated / separate

Light, heavy, residual and blended oils; natural gas, LPG, biogas and coke-oven gas (custom design) / Combinations: gas–oil, pulverized coal, gas–coal, oil–coal and gas–oil–coal
View features, technical data and model specifications
- Independent asphalt exhaust-gas and fuel passages with swirling flow minimize emissions.
- Independent digital calculation and control of fuel, air and exhaust gas enable precise ratio adjustment.
- Modular design simplifies installation and maintenance.
- Choose an integrated or separate layout to match user requirements and equipment characteristics.
- Recovers air/exhaust gas up to 250℃ from box-type combustion equipment to save fuel.
- Available for CSEI, EN, EAC and other requirements.
- Optional NOx emission levels: <30 / <50 / <80 / <120 mg/m³.
Benefits of exhaust-gas recovery
Recovery and reburning of exhaust gases support strict environmental standards. Recovering exhaust gas up to 250℃ shortens heating time and saves fuel. Independent control of multiple passages maintains stable flames and exhaust-gas recovery for efficient, environmentally conscious combustion.
Specifications by model
Natural-gas output table
Scroll horizontally to view all specifications ↔
| Model Model | Output Output (kW) | Gas consumption Gas consumption (Nm³/h) | Valve size Valve train size | Control method Control | Combustion method Combustion | Turndown ratio Turndown ratio | Applicable plant Mixing plant |
|---|---|---|---|---|---|---|---|
| EC4GR | 390/650-3900 | 39/65-390 | 2" | Electronic proportional control Intelligent digital control Electronic modulation Intelligent digital control | Tangential gas ring Tangential gas ring | 1:6 1:10 | 500 |
| EC5GR | 698/1160-6980 | 70/116-698 | DN65 | 1000 | |||
| EC8GR | 1563/2600-15630 | 156/260-1563 | DN100 | 2000 | |||
| EC9GR | 2000/3350-20000 | 203/335-2030 | DN100 | 3000 | |||
| EC11GR | 2900/4830-29000 | 292/480-2920 | DN125 | 4000 | |||
| EC12GR | 3350/5580-33500 | 337/558-3370 | DN125 | 5000 | |||
| EC13GR | 3900/6500-39000 | 393/650-3930 | DN150 | 6000 |
Heavy/residual oil output table
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| Model Model | Output Output (kW) | Oil consumption Oil consumption (kg/h) | Control method Control | Combustion method Combustion | Turndown ratio Turndown ratio | Applicable plant Mixing plant | |
|---|---|---|---|---|---|---|---|
| Heavy oil Heavy oil | Light oil Light oil | ||||||
| EC4NQR | 390/650-3900 | 35/70-350 | 33/65-330 | Electronic proportional control Intelligent digital control Electronic modulation Intelligent digital control | Low-pressure atomizing medium Low-pressure atomization | 1:5 1:10 | 500 |
| EC5NQR | 698/1160-6980 | 63/125-625 | 59/120-590 | 1000 | |||
| EC8NQR | 1563/2600-15630 | 140/300-1400 | 132/265-1320 | 2000 | |||
| EC9NQR | 2000/3350-20000 | 180/360-1800 | 170/340-1685 | 3000 | |||
| EC11NQR | 2900/4830-29000 | 260/550-2600 | 245/490-2450 | 4000 | |||
| EC12NQR | 3350/5580-33500 | 300/600-3000 | 280/565-2825 | 5000 | |||
| EC13NQR | 3900/6500-39000 | 350/700-3500 | 329/660-3290 | 6000 | |||
Natural-gas/heavy-oil/residual-oil output table
Scroll horizontally to view all specifications ↔
| Model Model | Output Output (kW) | Gas consumption Gas consumption (Nm³/h) | Oil consumption Oil consumption (kg/h) | Valve size Valve train size | Control method Control | Combustion method Combustion | Turndown ratio Turndown ratio | Applicable plant Mixing plant | |
|---|---|---|---|---|---|---|---|---|---|
| Heavy oil Heavy oil | Light oil Light oil | ||||||||
| EC4GNQR | 390/650-3900 | 39/65-390 | 35/70-350 | 33/65-330 | 2" | Electronic proportional control Intelligent digital control Electronic modulation Intelligent digital control | Gas: tangential gas ring Oil: low-pressure atomizing medium Gas: tangential ring Oil: low-pressure atomization | Gas 1:6 / 1:10 Oil 1:5 / 1:10 | 500 |
| EC5GNQR | 698/1160-6980 | 70/116-698 | 63/125-625 | 59/120-590 | DN65 | 1000 | |||
| EC8GNQR | 1563/2600-15630 | 156/260-1563 | 140/300-1400 | 132/265-1320 | DN100 | 2000 | |||
| EC9GNQR | 2000/3350-20000 | 203/335-2030 | 180/360-1800 | 170/340-1685 | DN100 | 3000 | |||
| EC11GNQR | 2900/4830-29000 | 292/480-2920 | 260/550-2600 | 245/490-2450 | DN125 | 4000 | |||
| EC12GNQR | 3350/5580-33500 | 337/558-3370 | 300/600-3000 | 280/565-2825 | DN125 | 5000 | |||
| EC13GNQR | 3900/6500-39000 | 393/650-3930 | 350/700-3500 | 329/660-3290 | DN150 | 6000 | |||
Note: Technical figures are laboratory test values and may vary with operating conditions. Calorific values: natural gas 8600 kcal/Nm³, heavy oil 9600 kcal/kg, light oil 10200 kcal/kg. Contact sales for non-standard fuels and other specifications.
05 / ASPHALT PLANT BURNER
EI
Axial-flow burner for asphalt plants
Uses an axial-flow blower, electronic proportional control and low-pressure air atomization.
- Output range
- 375 – 31,000 kW
- Applicable plant
- 1000 – 6000
- Type
- Axial-flow type

Fuels: light oil, heavy oil, residual oil and blended oil; natural gas, LPG, biogas and coke-oven gas (custom design), etc. / Dual gas–oil operation
View features, technical data and model specifications
- The EI series is an H-type burner based on an axial-flow blower. Dual frequency/pressure control widens its operating range.
- An axial-flow windbox and vortex mixer improve flame intensity and combustion efficiency.
- An integrated low-noise design combines functionality with appearance.
- A straight cylindrical connection and movable base simplify movement and maintenance, with a low failure rate.
- Independent digital metering of fuel and oxygen, with ratio calculation by a logic controller, improves efficiency and reliability.
- Oil uses low-pressure supply and low-pressure air atomization for various lower-quality fuels. Gas-ring injection improves gas-firing efficiency and reduces emissions.
Specifications by model
Natural-gas output table
Scroll horizontally to view all specifications ↔
| Model Model | Output Output (kW) | Gas consumption Gas consumption (Nm³/h) | Valve size Valve train size | Blower motor Fan motor (kW) | Control method Control | Combustion method Combustion | Applicable plant Mixing plant |
|---|---|---|---|---|---|---|---|
| EI600G | 700-7000 | 75-750 | DN80 | 11 | Electronic proportional control Intelligent digital control Electronic modulation Intelligent digital control | Tangential gas ring Tangential gas ring | 1000 |
| EI900G | 1100-11000 | 110-1100 | DN80 | 15 | 1500 | ||
| EI1200G | 1350-13500 | 139-1390 | DN100 | 15 | 2000 | ||
| EI1800G | 2100-21000 | 220-2200 | DN125 | 22 | 3000 | ||
| EI2500G | 2700-27000 | 280-2780 | DN125 | 37 | 4000 | ||
| EI3000G | 3100-31000 | 330-3250 | DN125 | 45 | 5000 |
Heavy/residual oil output table
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| Model Model | Output Output (kW) | Oil consumption Oil consumption (kg/h) | Blower motor Fan motor (kW) | Oil-pump motor Oil pump motor (kW) | Control method Control | Combustion method Combustion | Applicable plant Mixing plant | |
|---|---|---|---|---|---|---|---|---|
| Heavy oil Heavy oil | Light oil Light oil | |||||||
| EI600NQ | 700-7000 | 65-650 | 60-590 | 11 | 1.5 | Electronic proportional control Intelligent digital control Electronic modulation Intelligent digital control | Low-pressure atomizing medium Medium-pressure atomizing medium Low-pressure atomization Medium-pressure atomization | 1000 |
| EI900NQ | 1100-11000 | 100-1000 | 93-930 | 15 | 1.5 | 1500 | ||
| EI1200NQ | 1350-13500 | 120-1200 | 110-1100 | 15 | 2.2 | 2000 | ||
| EI1800NQ | 2100-21000 | 190-1900 | 170-1740 | 22 | 2.2 | 3000 | ||
| EI2500NQ | 2700-27000 | 240-2400 | 220-2200 | 37 | 4 | 4000 | ||
| EI3000NQ | 3100-31000 | 280-2800 | 260-2600 | 45 | 5.5 | 5000 | ||
Natural-gas/heavy-oil/residual-oil output table
Scroll horizontally to view all specifications ↔
| Model Model | Output Output (kW) | Oil consumption Oil consumption (kg/h) | Gas consumption Gas consumption (Nm³/h) | Valve size Valve train size | Blower motor Fan motor (kW) | Oil-pump motor Oil pump motor (kW) | Control method Control | Combustion method Combustion | Applicable plant Mixing plant | |
|---|---|---|---|---|---|---|---|---|---|---|
| Heavy oil Heavy oil | Light oil Light oil | |||||||||
| EI600GNQ | 700-7000 | 65-650 | 60-590 | 75-750 | DN80 | 11 | 1.5 | Electronic proportional control Intelligent digital control Electronic modulation Intelligent digital control | Gas: tangential gas ring Oil: low/medium-pressure atomizing medium Gas: tangential ring Oil: low/medium-pressure atomization | 1000 |
| EI900GNQ | 1100-11000 | 100-1000 | 93-930 | 110-1100 | DN80 | 15 | 1.5 | 1500 | ||
| EI1200GNQ | 1350-13500 | 120-1200 | 110-1100 | 139-1390 | DN100 | 15 | 2.2 | 2000 | ||
| EI1800GNQ | 2100-21000 | 190-1900 | 170-1740 | 220-2200 | DN125 | 22 | 2.2 | 3000 | ||
| EI2500GNQ | 2700-27000 | 240-2400 | 220-2200 | 280-2780 | DN125 | 37 | 4 | 4000 | ||
| EI3000GNQ | 3100-31000 | 280-2800 | 260-2600 | 330-3250 | DN125 | 45 | 5.5 | 5000 | ||
Note: Technical figures are laboratory test values and may vary with operating conditions. Calorific values: natural gas 8600 kcal/Nm³, heavy oil 9600 kcal/kg, light oil 10200 kcal/kg. Contact sales for non-standard fuels and other specifications.
06 / ASPHALT PLANT BURNER
EC Multi-Fuel
Pulverized-coal, gas and oil multifuel burner
Integrates coal, gas and oil combustion in one system, with automatic operation for each fuel.
- Fuel
- Pulverized coal / gas / oil
- Pulverized-coal turndown ratio
- 1:4
- Control
- Automatic operation by fuel type

View features, technical data and model specifications
Multifuel combustion system
The EC multifuel burner integrates coal, gas and oil combustion through low-NOx technology and staged fuel/air supply. Gas/oil operation uses four-stage air supply; coal operation uses three external air stages to reduce NOx. Selecting a fuel starts its dedicated program for automatic operation, safe changeover and self-diagnosis. Pulverized-coal operation also supports fully automatic intelligent control.
Pulverized-coal combustion system
The pulverized-coal burner combines staged fuel/air supply, rich/lean separation, a flared multi-element flame stabilizer, staged combustion and air-enveloped combustion. Three external air stages effectively reduce NOx emissions.
- A three-stage concentrator in the primary-air passage separates the air/coal mixture into rich and lean streams. A flared multi-element flame stabilizer around the central air pipe directs flow into central and radial recirculation zones. Strong mixing of coal dust with hot exhaust gas rapidly releases combustible volatiles, reduces NOx through stable low-oxygen combustion and improves low-load flame stability.
- A transitional straight airflow outside the primary-air passage reinforces air staging, while an outer swirling flow limits rapid coal dispersion. Straight secondary air supports complete combustion and prevents clinker formation. Tertiary air cools the flame tube and quickly burns remaining coal particles.
- Pulverized-coal combustion turndown ratio
- 1:4
A wider turndown ratio requires a custom design.
Pulverized-coal quality requirements
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| Net calorific value | 5500 - 6500 kcal/kg | Ash | < 7% |
|---|---|---|---|
| Moisture | < 5% | Volatile matter | > 30% |
| Sulfur | < 0.4% | Particle size | 85% passing 200 mesh |
Automatic control system
The intelligent multifuel control system uses a logic controller from an internationally recognized brand to select a dedicated program for each fuel. Functions include automatic ignition, flame-failure protection, automatic load adjustment, air/coal/oil/gas ratio control, combustion-fault detection and alarms, and equipment interlocks. Integration with plant controls automatically matches burner parameters to the specified plant operating values and improves overall automation.
Example configuration for a type-4000 plant
- Maximum thermal output
- 24,500 kW
- Maximum coal feed rate
- 4,200 kg/h
- Combustion-air blower
- 75 kW
- Air supply
- Three external stages
1. Pulverized-coal metering and conveying system
Intermediate hopper 1 m³: high-level indication/alarm, anti-bridging and bridge-breaking devices, and outlet safety gate valve. Metering feeder: maximum 4200 kg/h, 2.2 kW, variable-frequency speed control. Conveying system: maximum 4200 kg/h, 45 kW blower, maximum airflow 54 m³/min, pressure 24 kPa. A mixer evenly combines air and coal for pneumatic conveying through a wear-resistant burner hose, with pipeline-pressure monitoring.
2. Combustion system
Maximum burner thermal output 24500 kW; maximum coal feed 4200 kg/h; blower power 75 kW.
3. Automatic control system
One operating panel and one automatic control system. Automatic ignition, electronic proportional control and intelligent pressure/frequency control.
Pulverized-coal metering and conveying system
Operating principle: Stored pulverized coal enters an intermediate hopper through a rotary feeder or screw conveyor; high-level detection starts/stops supply. During burner operation, a metering feeder delivers coal to an air/coal mixer. Conveying-air velocity and pressure carry it through a wear-resistant hose to the burner. Combustion heat continuously heats material in the drying drum.
① Coal-conveying blower ② Silencer ③ Pulverized-coal hopper ④ Metering feeder ⑤ Air/coal mixer ⑥ Conveying hose ⑦ Burner body
Design features: ① Fully enclosed operation limits dust dispersion. ② Hopper-level monitoring maintains stable inventory. ③ Pneumatic bridge breaking ensures continuous supply. ④ Closed-loop integration of metered feeding and plant material-temperature control adjusts fuel supply to maintain the required material temperature.
Model specifications by fuel combination
Coal output table
Scroll horizontally to view all specifications ↔
| Model Model | Output Output (kW) | Coal consumption Coal consumption (kg/h) | Blower motor Fan motor (kW) | Conveying blower Conveying blower (kW) | Coal feeder Coal feeder (kW) | Control method Control | Applicable plant Mixing plant |
|---|---|---|---|---|---|---|---|
| EC6C | 7100 | 1000 | 15 | 11 | 1.5 | Electronic proportional control Modulation | 1000 |
| EC7C | 10600 | 1500 | 22 | 15 | 1.5 | 1500 | |
| EC8C | 14200 | 2000 | 30 | 18.5 | 2.2 | 2000 | |
| EC9C | 21300 | 3000 | 55 | 30 | 2.2 | 3000 | |
| EC10C | 27800 | 4200 | 75 | 45 | 2.2 | 4000 | |
| EC11C | 35500 | 5000 | 90 | 45 | 2.2 | 5000 |
Coal/natural-gas output table
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| Model Model | Output Output (kW) | Coal consumption Coal consumption (kg/h) | Gas consumption Gas consumption (Nm³/h) | Blower motor Fan motor (kW) | Coal feeder Coal feeder (kW) | Conveying blower Conveying blower (kW) | Gas valve train Gas valve train | Control method Control | Applicable plant Mixing plant |
|---|---|---|---|---|---|---|---|---|---|
| EC6CG | 7100 | 1000 | 710 | 15 | 1.5 | 11 | DN65 | Electronic proportional control Modulation | 1000 |
| EC7CG | 10600 | 1500 | 1060 | 22 | 1.5 | 15 | DN80 | 1500 | |
| EC8CG | 14200 | 2000 | 1420 | 30 | 2.2 | 18.5 | DN80 | 2000 | |
| EC9CG | 21300 | 3000 | 2130 | 55 | 2.2 | 30 | DN100 | 3000 | |
| EC10CG | 27800 | 4200 | 2780 | 75 | 2.2 | 45 | DN125 | 4000 | |
| EC11CG | 35500 | 5000 | 3550 | 90 | 2.2 | 45 | DN125 | 5000 |
Coal/heavy-oil output table
Scroll horizontally to view all specifications ↔
| Model Model | Output Output (kW) | Coal consumption Coal consumption (kg/h) | Oil consumption Oil consumption (kg/h) | Blower motor Fan motor (kW) | Oil-pump motor Ignition oil pump motor (kW) | Coal feeder Coal feeder (kW) | Conveying blower Conveying blower (kW) | Control method Control | Applicable plant Mixing plant |
|---|---|---|---|---|---|---|---|---|---|
| EC6CNQ | 7100 | 1000 | 630 | 15 | 1.5 | 1.5 | 11 | Electronic proportional control Modulation | 1000 |
| EC7CNQ | 10600 | 1500 | 950 | 22 | 1.5 | 1.5 | 15 | 1500 | |
| EC8CNQ | 14200 | 2000 | 1270 | 30 | 2.2 | 2.2 | 18.5 | 2000 | |
| EC9CNQ | 21300 | 3000 | 1900 | 55 | 2.2 | 2.2 | 30 | 3000 | |
| EC10CNQ | 27800 | 4200 | 2490 | 75 | 4 | 2.2 | 45 | 4000 | |
| EC11CNQ | 35500 | 5000 | 3180 | 90 | 5.5 | 2.2 | 45 | 5000 |
Coal/natural-gas/heavy-oil output table
Scroll horizontally to view all specifications ↔
| Model Model | Output Output (kW) | Coal consumption Coal consumption (kg/h) | Oil consumption Oil consumption (kg/h) | Gas consumption Gas consumption (Nm³/h) | Blower motor Fan motor (kW) | Oil-pump motor Ignition oil pump motor (kW) | Coal feeder Coal feeder (kW) | Conveying blower Conveying blower (kW) | Control method Control | Applicable plant Mixing plant |
|---|---|---|---|---|---|---|---|---|---|---|
| EC6CGNQ | 7100 | 1000 | 630 | 710 | 15 | 1.5 | 1.5 | 11 | Electronic proportional control Modulation | 1000 |
| EC7CGNQ | 10600 | 1500 | 950 | 1060 | 22 | 1.5 | 1.5 | 15 | 1500 | |
| EC8CGNQ | 14200 | 2000 | 1270 | 1420 | 30 | 2.2 | 2.2 | 18.5 | 2000 | |
| EC9CGNQ | 21300 | 3000 | 1900 | 2130 | 55 | 2.2 | 2.2 | 30 | 3000 | |
| EC10CGNQ | 27800 | 4200 | 2490 | 2780 | 75 | 4 | 2.2 | 45 | 4000 | |
| EC11CGNQ | 35500 | 5000 | 3180 | 3550 | 90 | 5.5 | 2.2 | 45 | 5000 |
Note: Calorific values — coal 6000 kcal/kg, natural gas 8600 kcal/Nm³, heavy oil 9600 kcal/kg, light oil 10200 kcal/kg. Contact sales for non-standard fuels.
07 / THERMAL OIL HEATER
EP
Hot-air burner for thermal oil heaters
A compact burner for thermal oil heaters, with models available for different fuels.
- Maximum output
- 850 – 4,800 kW
- Applicable heater
- 50 – 300 ×10⁴ kcal/h
- Model
- EP1 – EP4

Natural gas / light oil / heavy oil; dual gas–oil operation
View features, technical data and model specifications
Five reduction technologies
Low carbon / low NOx (NOx <30 / <50 / <80 / <120 mg/m³) / low oxygen / low noise / low electricity use
- Compact, space-saving design
- Fine flame-shape adjustment
- Fully electronic intelligent control (option)
- Multi-passage staging technology
- Multiple fuel options
- Air-damper-free control (option)
- Easy functional expansion
- Frequency control reduces startup electricity use by 70%
- Protection IP44 (contact us for IP54/IP64)
Specifications by model
Natural-gas output table
Scroll horizontally to view all specifications ↔
| Model Model | Maximum output Max. output (kW) | Maximum gas consumption Max. gas consumption (Nm³/h) | Valve size Valve train size | Gas pressure Gas pressure (mbar) | Control method Control | Combustion method Combustion | Applicable thermal oil heater Thermal oil heater spec. (x10⁴ kcal/h) |
|---|---|---|---|---|---|---|---|
| EP1GE | 850 | 85 | 1 1/2" | 150 | Electronic proportional control Electronic modulation | Tangential gas ring Tangential gas ring | 50 |
| EP2GE | 2000 | 200 | 2" | 150 | 70-125 | ||
| EP3GE | 3000 | 300 | 2"*/DN65 | 200 | 150-200 | ||
| EP4GE | 4800 | 480 | DN65 | 300 | 250-300 |
Light/heavy oil output table
Scroll horizontally to view all specifications ↔
| Model Model | Maximum output Max. output (kW) | Light-oil consumption Light oil consumption (kg/h) | Control method Control | Combustion method Combustion | Applicable thermal oil heater Thermal oil heater spec. (x10⁴ kcal/h) |
|---|---|---|---|---|---|
| EP1NQE | 850 | 75 | Electronic proportional control Electronic modulation | Low-pressure atomizing medium Low-pressure atomization | 50 |
| EP2NQE | 2000 | 180 | 70-125 | ||
| EP3NQE | 3000 | 270 | 150-200 | ||
| EP4NQE | 4800 | 430 | 250-300 |
Natural-gas/light-oil/heavy-oil output table
Scroll horizontally to view all specifications ↔
| Model Model | Maximum output Max. output (kW) | Maximum gas consumption Max. gas consumption (Nm³/h) | Light-oil consumption Light oil consumption (kg/h) | Valve size Valve train size | Gas pressure Gas pressure (mbar) | Control method Control | Combustion method Combustion | Applicable thermal oil heater Thermal oil heater spec. (x10⁴ kcal/h) |
|---|---|---|---|---|---|---|---|---|
| EP1GE | 850 | 85 | 75 | 1 1/2" | 150 | Electronic proportional control Electronic modulation | Gas: tangential gas ring Oil: low-pressure atomizing medium Gas: tangential ring Oil: low-pressure atomization | 50 |
| EP2GE | 2000 | 200 | 180 | 2" | 150 | 70-125 | ||
| EP3GE | 3000 | 300 | 270 | 2"*/DN65 | 200 | 150-200 | ||
| EP4GE | 4800 | 480 | 430 | DN65 | 300 | 250-300 |
Note: The standard EP1-EP2 valve train is DUNGS; * indicates a Siemens valve train. Natural-gas calorific value 8600 kcal/Nm³; heavy oil 9600 kcal/kg. Contact sales for non-standard fuels.
Maximum output versus combustion-air temperature
08 / THERMAL OIL HEATER
ES
Air/steam-atomizing burner for thermal oil heaters
An integrated burner using compressed air or steam as the atomizing medium.
- Output range
- 175 – 10,467 kW
- Applicable heater
- 30 – 850 ×10⁴ kcal/h
- Model
- ES50NQ – ES900NQM

Light oil, blended oil, heavy oil, residual oil, gas and dual oil–gas operation
View features, technical data and model specifications
Integrated construction and assisted atomization
Integrated construction and a hinged mounting flange simplify operation and maintenance. It suits thermal oil heaters for asphalt heating under demanding conditions, drying drums in mobile or small stationary plants, and other heating equipment. Output range: 175-10467 kW. It supports light, blended, heavy and residual oils, gas and dual oil–gas operation. Oil burners use compressed air or steam as the atomizing medium, accommodating sites with varied fuels.
Specifications by model
ES oil output table
Scroll horizontally to view all specifications ↔
| Model Model | Output Output (kW) | Oil consumption Oil consumption (kg/h) | Control method Control | Combustion method Combustion | Standard turndown ratio Std. turndown ratio | Applicable thermal oil heater Thermal oil heater spec. (x10⁴ kcal/h) |
|---|---|---|---|---|---|---|
| ES50NQ | 175-581 | 15-50 | Progressive two-stage control Progressive two-stage | Oil: low-pressure air/steam atomization High-pressure atomization Oil: Low-pressure air/steam High-pressure atomization | Oil 1:4 | 30 |
| ES100NQ | 348-1046 | 30-90 | 50-75 | |||
| ES150NQ | 465-1628 | 40-140 | 100 | |||
| ES200NQ | 581-2093 | 50-180 | 150 | |||
| ES250NQ | 698-2791 | 60-240 | 200 | |||
| ES300NQM | 814-3489 | 70-300 | Proportional control Modulating | 250 | ||
| ES380NQM | 1163-4419 | 100-380 | 300 | |||
| ES500NQM | 1279-5349 | 110-460 | 350-400 | |||
| ES600NQM | 1860-6978 | 160-600 | 400-500 | |||
| ES800NQM | 2035-8606 | 175-740 | 600-700 | |||
| ES900NQM | 2093-10467 | 180-900 | 700-850 |
Note: Based on a heavy-oil calorific value of 9,600 kcal/kg.
09 / SYSTEM SOLUTIONS
Gas fuel
Supply and control system
Gas pressure-regulation, shutoff and control valve trains are configured for each project's fuel conditions.
- Supply
- Pressure regulation and filtration
- Control
- Automatic shutoff and leak detection
- Configuration
- Project-specific design

View features and technical data
Gas pressure-regulating valve train
Gas pressure-regulating valve trains are designed and supplied for each project. A typical assembly includes a manual shutoff valve, filter, pressure regulator, expansion joint and pressure gauge to maintain stable pressure and filter the gas.
Gas control valve train
The gas control valve train includes a rapid automatic shutoff valve for main fuel, a combined rapid automatic shutoff valve for ignition fuel, a pressure controller and a valve-tightness leak detector.
Pneumatic gas control valve train (standard, custom and explosion-proof)
Applicable to non-standard gases (coke-oven, coalbed, blast-furnace and producer gases), explosion-proof burners or multiple burners sharing supply valves. Each burner requires separate filtering, metering and control devices.
Main components
10 / SYSTEM SOLUTIONS
Liquid fuel
Light/heavy oil supply and control system
Configures pumps, filters, heavy-oil heaters and safety valves, with specifications for GL and NL models.
- Fuel
- Light oil / heavy oil
- Light-oil supply
- GL500 – GL3000
- Heavy-oil supply
- NL500 – NL3000

View features, technical data and model specifications
Light/heavy oil pump unit
SPECO light/heavy oil pump units include filters, pumps and heaters for heavy oil. Filters and pumps can use a single circuit or duty/standby dual circuits. Dual circuits maintain operation during scheduled servicing or a fault. Heavy oil is heated electrically or with thermal oil or steam to reach the viscosity required for atomization.
Safety valve train for light/heavy oil
The light/heavy oil safety valve train includes rapid automatic shutoff valves for fuel and atomizing medium, shutoff valves for purging the oil piping and lance, pressure controllers/gauges and heavy-oil thermometers. Its modular design enables quick, simple installation.
Main components
Supply-system specifications by model
Light-oil supply system
Light-oil supply system: self-cleaning filter on pump suction / pump with pressure regulator / pressure gauge with switch
GL light-oil supply system specifications
Scroll horizontally to view all specifications ↔
| Model Model | Oil-pump flow rate Oil Pump Flow | Maximum nozzle injection rate Max. Fuel Injection Rate (kg/h) | Motor power Motor Power (kW) |
|---|---|---|---|
| GL500 | 1000 | 500 | 1.5 |
| GL750 | 1500 | 750 | 2.2 |
| GL1000 | 2000 | 1000 | 3.0 |
| GL1500 | 3000 | 1500 | 4.0 |
| GL2250 | 4500 | 2250 | 5.5 |
| GL3000 | 6000 | 3000 | 7.5 |
Heavy-oil supply system
Electrically preheated heavy-oil supply system: self-cleaning suction filter / pump with pressure regulator / electric heater with reinforced housing / pressure gauges and thermometers with valves and switches / high- and low-limit thermostats / oil-water separator connected to the oil circuit
NL heavy-oil supply system specifications
Scroll horizontally to view all specifications ↔
| Model Model | Oil-pump flow rate Oil Pump Flow | Maximum nozzle injection rate Max. Fuel Injection Rate (kg/h) | Motor power Motor Power (kW) | Preheater power Preheater Power (kW) | Number of preheaters No. of Preheaters |
|---|---|---|---|---|---|
| NL500 | 1000 | 500 | 1.5 | 20 | 1 |
| NL750 | 1500 | 750 | 2.2 | 30 | 1 |
| NL1000 | 2000 | 1000 | 3.0 | 40 | 1 |
| NL1500 | 3000 | 1500 | 4.0 | 60 | 2 |
| NL2250 | 4500 | 2250 | 5.5 | 80 | 2 |
| NL3000 | 6000 | 3000 | 7.5 | 80 | 2 |
The catalogue does not specify a unit for oil-pump flow rate. Contact sales to confirm the unit and final specifications.
11 / SYSTEM SOLUTIONS
Air supply
Dedicated combustion-air blower system
Blowers are designed for burner and boiler operating conditions, with control of the intake-air/FGR ratio.
- Design
- CFD-based
- Control
- Electronic proportional control
- Standard equipment
- Inlet, silencer and inspection door

View features and technical data
Dedicated blower design
Computational fluid dynamics, SolidWorks, Unigraphics, AutoCAD and product-data management tools are used to design efficient blowers for burner and boiler conditions. Flow fields, application, stress, resistance, operation and maintenance are considered for compatibility with the burner system. The compact, multifunctional design uses an impeller made from aviation-grade aluminum sheet for improved efficiency. Intake-air and exhaust-gas recirculation ratios are automatically regulated by electronic proportional control. An inlet, silencer and inspection door are standard. Modular components and flange connections simplify transport, installation and maintenance. Blowers are available for burners, boilers, industrial furnaces, asphalt plants, dust collection and cooling.
Blower features
- Computational-fluid-dynamics design
- Aviation-grade aluminum impeller
- Automatic intake-air/FGR ratio control
- Standard inlet, silencer and inspection door
12 / SYSTEM SOLUTIONS
Integrated control
Integrated boiler and burner control system
Combines boiler and burner automation in a single program with an integrated operator interface.
- Control
- Electronic / PLC
- Operation
- Boiler/burner integration
- Management
- BMS / central control

View features and technical data
Integrated boiler and burner operation
SPECO integrated control combines boiler and burner control in one program for precise operation, based on automation concepts widely used in Europe and the United States. It addresses fragmented controls, poor compatibility, multiple separate operating points and uneconomical operation.
Key benefits
Unified software compatibility and electrical control improve precision and save energy. Consistent design and manufacturing improve safety and reliability while reducing production costs. A single intuitive interface improves operability and safety. Consistent professional commissioning supports safe, efficient operation. One-stop after-sales service improves work efficiency and lowers service costs. Components and software can be upgraded easily.
Burner control methods
Dedicated electronic intelligent control / PLC-based intelligent control / liquid-fuel supply and control system / gas-fuel supply and control system
System categories
13 / SYSTEM SOLUTIONS
Online monitoring
Continuous exhaust-gas monitoring system
Continuously measures exhaust-gas concentrations, emissions and operating values, with remote monitoring and data transmission.
- Measurement
- Pollutants and operating values
- Monitoring
- Unattended remote monitoring
- Output
- 4–20 mA

View features and technical data
Continuous measurement items
Continuously measures concentrations and emissions of nitrogen oxides, nitric oxide, oxygen, carbon monoxide, carbon dioxide and particulate matter in exhaust gases, along with temperature, pressure, flow and humidity.
Product features
- Unattended remote monitoring.
- Wireless transmission supports online data-reporting requirements of environmental monitoring authorities and others.
- An insertion probe and multi-door design simplify installation and maintenance.
- 4-20 mA output; double-enclosure construction.
System configuration
14 / SYSTEM SOLUTIONS
Intelligent cloud
Remote monitoring, alarms, analysis and equipment management
Connects real-time operating status, fault alarms, historical-data analysis and equipment maintenance.
- Monitoring
- Real-time operating status
- Alarms
- WeChat, SMS and email
- Management
- Equipment lifecycle and work history

View features and technical data
Real-time monitoring
View equipment operating status in real time.
Fault alarms
Sends WeChat, SMS and email notifications according to user-defined conditions.
Data analysis
Stores and analyzes historical data to support fault diagnosis and preventive maintenance.
Equipment management
Tracks maintenance status through equipment lifecycles and work-order histories.
Service workflow
- Real-time monitoring
- Fault alarms
- Data analysis
- Equipment management
CONTACT SPECO
Discuss the burner specifications for your equipment
We help select products for your fuel, plant capacity and operating conditions.
Source: SPECO Combustion Systems Catalogue 2026, Burner V1.3, pages 8–35. Specifications and performance may vary by model, fuel, test conditions and operating conditions. Contact sales to confirm application conditions and final specifications.
























