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SPECO · COMBUSTION SYSTEMS

Burners &
combustion systems

For asphalt plants and thermal oil heaters.
Explore combustion technologies and specifications by model.

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SPECO burner with blue and yellow flames and a lineup of burner models

PRODUCT LINEUP

Choose a burner for your application

Select a product to view its features, technical information and model specifications.

01 / 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
ecomaster · Low-noise burner for dryers
ecomaster · Low-noise burner for dryers
View features, technical data and model specifications
  1. Flexible control methods allow adjustment of firing rate.
  2. Its compressed-air atomization, described as unique in Korea, produces a fine fuel mist for near-complete combustion.
  3. Minimized secondary pollution helps extend filter-bag service life.
  4. The catalogue states the lowest fuel consumption among Korean burners, saving 1ℓ/Ton compared with conventional burners.
  5. 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.

  • P.I.D proportional control
  • Compressed-air atomized spray
  • Assisted purge system
  • Low NOx

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 configuration
ModelLB-320LB-240LB-160LB-120LB-080
Applicable plantAp4000Ap3000Ap2000Ap1300Ap1000

Common specifications

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Common specifications
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 : 1Compressor set pressure
Compressor setting
9 – 7 kg/cm²
Fuel pump
Fuel pump
Trochoid pumpTemperature control
Control
P.I.D proportional control · 1℃ precision

A2000 BC OIL consumption — in-house test measurements

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A2000 BC OIL consumption — in-house test measurements
NOMix 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
1180℃9.618.877.19SMA, LDPELDPE = anti-stripping additive
2170℃8.887.836.46Hot-mix asphalt
3160℃7.736.295.21Hot-mix asphalt
4150℃7.095.354.57Hot-mix asphalt
5140℃6.654.913.83Warm modified asphalt mix
6130℃5.314.673.49Warm 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.

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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
EBS · High-precision electronic intelligent burner
EBS · High-precision electronic intelligent burner

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.

  1. Turndown ratio 1:10. Electronic proportional calculation provides smooth startup and precise temperature control.
  2. Compact integrated construction and wheels simplify installation and maintenance. Consolidated fuel piping and control circuits simplify connections and provide a clean layout.
  3. Low-pressure fuel supply and air/steam atomization accommodate lower-quality oils.
  4. Fuel and combustion oxygen are metered independently; a programmable controller calculates their ratio to support complete combustion and improve efficiency by 2%.
  5. Inverter blower control reduces average annual electricity use by 30%–40%. High pressure resistance, adaptability and easy flame control.
  6. Gas-ring injection meets low-NOx emission requirements.
  7. Meets European requirements for safety, energy savings, environmental performance and intelligent operation.
  8. Component protection IP55, with key parts rated IP56–IP67, improves safety and reliability.
  • Low-pressure fuel supply and air atomization
  • Compact mobile design
  • Fuels of various qualities
  • 2% efficiency improvement with electronic proportional control

Specifications by model

Natural-gas output table

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Natural-gas output table
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
EBS600G710-710071-710DN6515Electronic proportional control
Intelligent digital control
Electronic modulation
Intelligent digital control
Tangential gas ring
Tangential gas ring
1000
EBS900G1060-10600106-1060DN80301500
EBS1200G1420-14200142-1420DN100372000
EBS1800G2130-21300213-2130DN100453000
EBS2500G2780-27800278-2780DN125554000
EBS3000G3550-35500355-3550DN125755000
EBS3500G4150-41500415-4150DN150906000

Heavy/residual oil output table

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Heavy/residual oil output table
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
EBS600NQ710-710063-63060-600151.5Electronic proportional control
Intelligent digital control
Electronic modulation
Intelligent digital control
Low-pressure atomizing medium
Low-pressure atomization
1000
EBS900NQ1060-1060095-95090-900301.51500
EBS1200NQ1420-14200127-1270120-1200372.22000
EBS1800NQ2130-21300190-1900180-1800452.23000
EBS2500NQ2780-27800249-2490235-23505544000
EBS3000NQ3550-35500318-3180300-3000755.55000
EBS3500NQ4150-41500371-3710350-3500907.56000

Natural-gas/heavy-oil/residual-oil output table

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Natural-gas/heavy-oil/residual-oil output table
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
EBS600GNQ710-710063-63060-60071-710DN65151.5Electronic 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
EBS900GNQ1060-1060095-95090-900106-1060DN80301.51500
EBS1200GNQ1420-14200127-1270120-1200142-1420DN100372.22000
EBS1800GNQ2130-21300190-1900180-1800213-2130DN100452.23000
EBS2500GNQ2780-27800249-2490235-2350278-2780DN1255544000
EBS3000GNQ3550-35500318-3180300-3000355-3550DN125755.55000
EBS3500GNQ4150-41500371-3710350-3500415-4150DN150907.56000

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.

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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℃
EBS D · Low-NOx burner with exhaust-gas recovery
EBS D · Low-NOx burner with exhaust-gas recovery

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.

  1. Independent asphalt exhaust-gas and fuel passages with swirling flow minimize emissions.
  2. Independent digital calculation and control of fuel, air and exhaust gas enable precise ratio adjustment.
  3. A movable integrated design improves maintenance access.
  4. Recovers hot air or exhaust gas up to 250℃ to save fuel.
  5. Available for standards including China's CSEI, European EN and Russia's EAC.
  6. Optional NOx emission levels: <30 / <50 / <80 / <120 mg/m³.
  • Vacuum internal recirculation
  • Wind-tunnel reburning
  • Low-oxygen combustion
  • V-shaped sonic technology
  • Intersecting staged-flame combustion
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.

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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
EC…R · Burner with exhaust-gas recovery
EC…R · Burner with exhaust-gas recovery

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
  1. Independent asphalt exhaust-gas and fuel passages with swirling flow minimize emissions.
  2. Independent digital calculation and control of fuel, air and exhaust gas enable precise ratio adjustment.
  3. Modular design simplifies installation and maintenance.
  4. Choose an integrated or separate layout to match user requirements and equipment characteristics.
  5. Recovers air/exhaust gas up to 250℃ from box-type combustion equipment to save fuel.
  6. Available for CSEI, EN, EAC and other requirements.
  7. 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 ↔

Natural-gas output table
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
EC4GR390/650-390039/65-3902"Electronic proportional control
Intelligent digital control
Electronic modulation
Intelligent digital control
Tangential gas ring
Tangential gas ring
1:6
1:10
500
EC5GR698/1160-698070/116-698DN651000
EC8GR1563/2600-15630156/260-1563DN1002000
EC9GR2000/3350-20000203/335-2030DN1003000
EC11GR2900/4830-29000292/480-2920DN1254000
EC12GR3350/5580-33500337/558-3370DN1255000
EC13GR3900/6500-39000393/650-3930DN1506000

Heavy/residual oil output table

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Heavy/residual oil output table
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
EC4NQR390/650-390035/70-35033/65-330Electronic proportional control
Intelligent digital control
Electronic modulation
Intelligent digital control
Low-pressure atomizing medium
Low-pressure atomization
1:5
1:10
500
EC5NQR698/1160-698063/125-62559/120-5901000
EC8NQR1563/2600-15630140/300-1400132/265-13202000
EC9NQR2000/3350-20000180/360-1800170/340-16853000
EC11NQR2900/4830-29000260/550-2600245/490-24504000
EC12NQR3350/5580-33500300/600-3000280/565-28255000
EC13NQR3900/6500-39000350/700-3500329/660-32906000

Natural-gas/heavy-oil/residual-oil output table

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Natural-gas/heavy-oil/residual-oil output table
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
EC4GNQR390/650-390039/65-39035/70-35033/65-3302"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
EC5GNQR698/1160-698070/116-69863/125-62559/120-590DN651000
EC8GNQR1563/2600-15630156/260-1563140/300-1400132/265-1320DN1002000
EC9GNQR2000/3350-20000203/335-2030180/360-1800170/340-1685DN1003000
EC11GNQR2900/4830-29000292/480-2920260/550-2600245/490-2450DN1254000
EC12GNQR3350/5580-33500337/558-3370300/600-3000280/565-2825DN1255000
EC13GNQR3900/6500-39000393/650-3930350/700-3500329/660-3290DN1506000

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.

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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
EI · Axial-flow burner for asphalt plants
EI · Axial-flow burner for asphalt plants

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
  • Axial-flow burner
  • Electronic proportional control
  • Low-pressure air atomization
  • Fuels of various qualities
  1. The EI series is an H-type burner based on an axial-flow blower. Dual frequency/pressure control widens its operating range.
  2. An axial-flow windbox and vortex mixer improve flame intensity and combustion efficiency.
  3. An integrated low-noise design combines functionality with appearance.
  4. A straight cylindrical connection and movable base simplify movement and maintenance, with a low failure rate.
  5. Independent digital metering of fuel and oxygen, with ratio calculation by a logic controller, improves efficiency and reliability.
  6. 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.
  • Low carbon
  • Low NOx
  • Low oxygen
  • Low noise
  • Low electricity use

Specifications by model

Natural-gas output table

Scroll horizontally to view all specifications ↔

Natural-gas output table
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
EI600G700-700075-750DN8011Electronic proportional control
Intelligent digital control
Electronic modulation
Intelligent digital control
Tangential gas ring
Tangential gas ring
1000
EI900G1100-11000110-1100DN80151500
EI1200G1350-13500139-1390DN100152000
EI1800G2100-21000220-2200DN125223000
EI2500G2700-27000280-2780DN125374000
EI3000G3100-31000330-3250DN125455000

Heavy/residual oil output table

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Heavy/residual oil output table
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
EI600NQ700-700065-65060-590111.5Electronic 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
EI900NQ1100-11000100-100093-930151.51500
EI1200NQ1350-13500120-1200110-1100152.22000
EI1800NQ2100-21000190-1900170-1740222.23000
EI2500NQ2700-27000240-2400220-22003744000
EI3000NQ3100-31000280-2800260-2600455.55000

Natural-gas/heavy-oil/residual-oil output table

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Natural-gas/heavy-oil/residual-oil output table
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
EI600GNQ700-700065-65060-59075-750DN80111.5Electronic 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
EI900GNQ1100-11000100-100093-930110-1100DN80151.51500
EI1200GNQ1350-13500120-1200110-1100139-1390DN100152.22000
EI1800GNQ2100-21000190-1900170-1740220-2200DN125222.23000
EI2500GNQ2700-27000240-2400220-2200280-2780DN1253744000
EI3000GNQ3100-31000280-2800260-2600330-3250DN125455.55000

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.

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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
EC Multi-Fuel · Pulverized-coal, gas and oil multifuel burner
EC Multi-Fuel · Pulverized-coal, gas and oil multifuel burner
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.

  • EC…C · coal
  • EC…CG · coal / natural gas
  • EC…CNQ · coal / heavy oil
  • EC…CGNQ · coal / natural gas / heavy oil

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.

  1. 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.
  2. 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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Pulverized-coal quality requirements
Net calorific value5500 - 6500 kcal/kgAsh< 7%
Moisture< 5%Volatile matter> 30%
Sulfur< 0.4%Particle size85% 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

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Coal output table
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
EC6C7100100015111.5Electronic proportional control
Modulation
1000
EC7C10600150022151.51500
EC8C1420020003018.52.22000
EC9C21300300055302.23000
EC10C27800420075452.24000
EC11C35500500090452.25000

Coal/natural-gas output table

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Coal/natural-gas output table
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
EC6CG71001000710151.511DN65Electronic proportional control
Modulation
1000
EC7CG1060015001060221.515DN801500
EC8CG1420020001420302.218.5DN802000
EC9CG2130030002130552.230DN1003000
EC10CG2780042002780752.245DN1254000
EC11CG3550050003550902.245DN1255000

Coal/heavy-oil output table

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Coal/heavy-oil output table
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
EC6CNQ71001000630151.51.511Electronic proportional control
Modulation
1000
EC7CNQ106001500950221.51.5151500
EC8CNQ1420020001270302.22.218.52000
EC9CNQ2130030001900552.22.2303000
EC10CNQ27800420024907542.2454000
EC11CNQ3550050003180905.52.2455000

Coal/natural-gas/heavy-oil output table

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Coal/natural-gas/heavy-oil output table
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
EC6CGNQ71001000630710151.51.511Electronic proportional control
Modulation
1000
EC7CGNQ1060015009501060221.51.5151500
EC8CGNQ14200200012701420302.22.218.52000
EC9CGNQ21300300019002130552.22.2303000
EC10CGNQ278004200249027807542.2454000
EC11CGNQ35500500031803550905.52.2455000

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.

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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
EP · Hot-air burner for thermal oil heaters
EP · Hot-air burner for thermal oil heaters

Natural gas / light oil / heavy oil; dual gas–oil operation

View features, technical data and model specifications
  • For thermal oil heaters
  • Natural gas
  • Light/heavy oil
  • Dual gas–oil operation

Five reduction technologies

Low carbon / low NOx (NOx <30 / <50 / <80 / <120 mg/m³) / low oxygen / low noise / low electricity use

  1. Compact, space-saving design
  2. Fine flame-shape adjustment
  3. Fully electronic intelligent control (option)
  4. Multi-passage staging technology
  5. Multiple fuel options
  6. Air-damper-free control (option)
  7. Easy functional expansion
  8. Frequency control reduces startup electricity use by 70%
  9. Protection IP44 (contact us for IP54/IP64)

Specifications by model

Natural-gas output table

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Natural-gas output table
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)
EP1GE850851 1/2"150Electronic proportional control
Electronic modulation
Tangential gas ring
Tangential gas ring
50
EP2GE20002002"15070-125
EP3GE30003002"*/DN65200150-200
EP4GE4800480DN65300250-300

Light/heavy oil output table

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Light/heavy oil output table
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)
EP1NQE85075Electronic proportional control
Electronic modulation
Low-pressure atomizing medium
Low-pressure atomization
50
EP2NQE200018070-125
EP3NQE3000270150-200
EP4NQE4800430250-300

Natural-gas/light-oil/heavy-oil output table

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Natural-gas/light-oil/heavy-oil output table
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)
EP1GE85085751 1/2"150Electronic proportional control
Electronic modulation
Gas: tangential gas ring
Oil: low-pressure atomizing medium
Gas: tangential ring
Oil: low-pressure atomization
50
EP2GE20002001802"15070-125
EP3GE30003002702"*/DN65200150-200
EP4GE4800480430DN65300250-300

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

Maximum-output curves by combustion-air temperature
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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
ES · Air/steam-atomizing burner for thermal oil heaters
ES · Air/steam-atomizing burner for thermal oil heaters

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.

  • Integrated construction
  • Hinged mounting flange
  • Compressed-air/steam atomization

Specifications by model

ES oil output table

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ES oil output table
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)
ES50NQ175-58115-50Progressive two-stage control
Progressive two-stage
Oil: low-pressure air/steam atomization
High-pressure atomization
Oil: Low-pressure air/steam
High-pressure atomization
Oil 1:430
ES100NQ348-104630-9050-75
ES150NQ465-162840-140100
ES200NQ581-209350-180150
ES250NQ698-279160-240200
ES300NQM814-348970-300Proportional control
Modulating
250
ES380NQM1163-4419100-380300
ES500NQM1279-5349110-460350-400
ES600NQM1860-6978160-600400-500
ES800NQM2035-8606175-740600-700
ES900NQM2093-10467180-900700-850

Note: Based on a heavy-oil calorific value of 9,600 kcal/kg.

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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
Gas fuel · Supply and control system
Gas fuel · Supply and control system
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

  • Manual shutoff valve · filter
  • Pressure regulator · pressure gauge
  • Rapid automatic shutoff valve
  • Pressure controller
  • Leak detector
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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
Liquid fuel · Light/heavy oil supply and control system
Liquid fuel · Light/heavy oil supply and control system
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

  • Filter · oil pump
  • Heavy-oil heater
  • Duty/standby dual circuits
  • Rapid automatic shutoff valve
  • Pressure gauge · thermometer

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

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GL light-oil supply system 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)
GL50010005001.5
GL75015007502.2
GL1000200010003.0
GL1500300015004.0
GL2250450022505.5
GL3000600030007.5

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

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NL heavy-oil supply system 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
NL50010005001.5201
NL75015007502.2301
NL1000200010003.0401
NL1500300015004.0602
NL2250450022505.5802
NL3000600030007.5802

The catalogue does not specify a unit for oil-pump flow rate. Contact sales to confirm the unit and final specifications.

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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
Air supply · Dedicated combustion-air blower system
Air supply · Dedicated combustion-air blower system
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

  1. Computational-fluid-dynamics design
  2. Aviation-grade aluminum impeller
  3. Automatic intake-air/FGR ratio control
  4. Standard inlet, silencer and inspection door
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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
Integrated control · Integrated boiler and burner control system
Integrated control · Integrated boiler and burner control system
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

  • Burner management (BMS)
  • Asphalt plant control
  • Integrated plant/burner control
  • Central control
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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
Online monitoring · Continuous exhaust-gas monitoring system
Online monitoring · Continuous exhaust-gas monitoring system
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

  1. Unattended remote monitoring.
  2. Wireless transmission supports online data-reporting requirements of environmental monitoring authorities and others.
  3. An insertion probe and multi-door design simplify installation and maintenance.
  4. 4-20 mA output; double-enclosure construction.

System configuration

  • Particulate-matter monitoring subsystem
  • Exhaust-gas operating-parameter monitoring subsystem
  • Pollutant monitoring subsystem
  • Data acquisition and control system
  • Data processing and communications system
  • Intelligent monitoring system
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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
Intelligent cloud · Remote monitoring, alarms, analysis and equipment management
Intelligent cloud · Remote monitoring, alarms, analysis and equipment management
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

  1. Real-time monitoring
  2. Fault alarms
  3. Data analysis
  4. Equipment management
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CONTACT SPECO

Discuss the burner specifications for your equipment

We help select products for your fuel, plant capacity and operating conditions.

Product inquiry ↗

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.