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Product Introduction
The EBS-D is a multi-fuel low-NOx asphalt mixing plant burner configured for natural gas, light oil, or heavy oil. Eight published models cover output capacities from 4,150 to 41,500 kW.
Separate fuel-consumption ratings are provided for each operating mode:
Natural gas: 415–4,150 Nm³/h
Light oil: 350–3,500 kg/h
Heavy oil: 370–3,710 kg/h
The combustion structure uses controlled airflow, internal fuel-air mixing, and staged heat release. These features are intended to limit localized peak flame temperatures while maintaining the heat input required for aggregate drying.
Actual NOx, CO, oxygen, and particulate performance depends on the selected fuel, firing rate, dryer design, aggregate moisture, draft, excess-air setting, and commissioning results. Project-specific emission requirements should therefore be defined before the burner model and fuel configuration are approved.
Product Advantage
The EBS-D product description identifies a V-shaped airflow arrangement that guides combustion air through the burner head. The purpose of this structure is to distribute airflow around the flame rather than concentrating combustion in one narrow high-temperature region.
More even air distribution can support a controlled flame profile, but the final result also depends on the combustion head position, dryer pressure, fan performance, and fuel settings.
The burner divides combustion into multiple functional zones. Fuel and air are introduced and mixed in stages instead of releasing the full heat load at one point.
Staged combustion is commonly used to manage local oxygen availability and peak flame temperature. Both factors influence thermal NOx formation.
The overall combustion process must still provide enough oxygen to complete fuel oxidation. Excessively fuel-rich conditions may reduce NOx while increasing carbon monoxide, smoke, unburned hydrocarbons, or fuel deposits.
The EBS-D uses an internal mixing structure intended to improve turbulence and fuel dispersion before or during ignition. This is particularly relevant to liquid fuels, where droplet size and distribution affect flame stability and combustion completion.
For heavy-oil operation, burner performance also depends on:
Fuel viscosity
Fuel temperature
Filtration
Circulation
Supply pressure
Atomization conditions
Nozzle condition
Fuel contamination
The burner cannot compensate for heavy oil supplied outside the specified temperature, viscosity, or cleanliness range.
Partitioned and staggered combustion zones are intended to spread heat release along the available combustion region. The flame still needs enough space to develop without contacting the aggregate curtain, dryer shell, flights, or other internal structures.
Flame dimensions and burner-head position should be reviewed against the actual dryer drawing before installation.
Natural gas generally provides cleaner fuel handling and contains less bound nitrogen than heavy liquid fuels. It is often evaluated where the project has strict particulate, sulfur, or NOx requirements.
The gas system must supply the required volume and pressure at maximum firing demand. Pipeline capacity, regulator sizing, pressure variation, gas composition, valve-train arrangement, ventilation, and local gas codes must all be reviewed.
The published natural-gas ratings range from 415 to 4,150 Nm³/h across the eight EBS-D models.
Light oil can be used where pipeline gas is unavailable or where the plant requires a liquid-fuel backup. The published light-oil ratings range from 350 to 3,500 kg/h.
The fuel system should include suitable:
Storage
Transfer pumps
Filtration
Pressure control
Safety shut-off valves
Flexible connections
Leak containment
Atomization equipment
Fuel properties should match the approved burner specification.
Heavy oil can support projects where local supply and operating economics make it practical. The published heavy-oil ratings range from 370 to 3,710 kg/h.
Compared with natural gas or light oil, heavy-oil operation normally requires additional fuel preparation. This may include tank heating, pipe tracing, circulation, viscosity control, filtration, and cleaning of atomizing components.
Heavy oil can also contain more fuel-bound nitrogen and contaminants than natural gas. The required low-NOx performance must therefore be assessed separately for heavy-oil operation.
Multi-fuel capability means that the EBS-D platform can be configured to operate with the approved gas and oil systems. It does not automatically mean that different fuels can be blended or burned simultaneously.
A fuel changeover should follow the burner’s approved control sequence. Depending on the system design, this may include:
Reduce or stop the current firing mode.
Close and prove the active fuel safety valves.
Complete the required purge sequence.
Confirm the alternative fuel pressure and temperature.
Select the correct fuel curve and operating limits.
Verify ignition equipment and atomization conditions.
Start at the defined low-fire position.
Confirm flame stability and combustion readings.
Increase load under controlled conditions.
Fuel switching should not rely only on an operator changing a screen selection. The fuel train, valve feedback, flame safeguard, pressure switches, purge logic, and burner management system must all support the selected mode.
Each fuel requires its own approved air-fuel settings. Natural-gas settings should not be copied to light oil or heavy oil.
The EBS-D model should be selected from a heat balance rather than only the nominal asphalt plant classification.
The calculation should include:
Required aggregate throughput
Average and maximum moisture content
Incoming aggregate temperature
Required discharge temperature
Recycled asphalt percentage
Dryer surface and exhaust losses
Fuel heating value
Site altitude
Ambient temperature
Expected operating margin
Removing moisture from aggregate consumes a substantial part of the burner output. The same plant may require different heat input during dry and rainy operating periods.
Selecting a burner only for an extreme theoretical condition can result in oversizing. An oversized burner may spend most of its operating time at a low percentage of rated capacity, where air and fuel velocities may be less suitable for mixing.
Selection should consider both:
Maximum verified heat demand
Normal production load used during most operating hours
The chosen burner should have enough capacity for the maximum condition while retaining a practical operating range during normal production.
Burner capacity does not confirm mechanical or combustion compatibility. The project review should also include:
Dryer type
Drum diameter and length
Combustion-zone dimensions
Flight arrangement
Aggregate curtain location
Burner opening
Required burner nose length
Available negative pressure
Baghouse temperature limit
Burner support structure
A low-NOx flame may have different length or shape from the existing burner flame. Retrofit projects therefore require a review of the complete combustion zone.
The asphalt plant controller should coordinate burner firing demand with the material or exhaust temperature signal. The required control point depends on the plant design.
Temperature-control logic should address:
Start-up and warm-up
Production ramp-up
Aggregate feed changes
Moisture variation
Temporary production stops
High material temperature
High stack temperature
Controlled shutdown
The burner should not continue increasing output when aggregate flow is lost or the dryer operating conditions fall outside the approved sequence.
The burner fan, dryer, baghouse, induced-draft fan, dampers, ductwork, and stack form one airflow system.
Incorrect draft can contribute to:
Unstable ignition
Flame movement
Positive pressure at the burner opening
Excess combustion air
Higher exhaust heat loss
Increased CO
Reduced production
Dust leakage
Draft should be measured and recorded across the firing range during commissioning.
The burner management system may need to exchange signals with the asphalt plant controller, including:
Start permission
Burner demand
Selected fuel
Low-fire position
Flame status
Fuel-pressure status
Fan status
Purge complete
Burner running
Fault and lockout
Emergency shutdown
Material temperature
Stack temperature
The final interface list should be approved before the control cabinet and site wiring are completed.
A multi-fuel burner requires fuel-specific safety devices as well as common combustion interlocks.
The safety sequence should coordinate:
Combustion-air proving
Pre-purge and post-purge
Ignition transformer or pilot
Flame detection
Gas-valve proving
Oil-pressure monitoring
Heavy-oil temperature and viscosity limits
Atomizing-air or medium proving
Low-fire start
High-temperature limits
Dryer rotation and airflow
Emergency shutdown
Manual reset after lockout
Gas and oil safety valves must close when the flame is lost or a required operating condition is not satisfied.
The burner control system does not replace the asphalt plant’s emergency circuit, fire protection, fuel-storage safeguards, ventilation, gas detection, spill containment, or other devices required by local regulations.
Technical Parameters
| Model | Output capacity (KW) | Gas consumption (Nm3/h) | Light oil consumption (kg/h) | Heavy oil consumption (kg/h) | Specifications of the mixing plant |
| EBS350 (D) | 4150 | 415 | 350 | 370 | 500 |
| EBS600 (D) | 7100 | 710 | 600 | 630 | 1000 |
| EBS900 (D) | 10600 | 1060 | 900 | 950 | 1500 |
| EBS1200 (D) | 14200 | 1420 | 1200 | 1270 | 2000 |
| EBS1800 (D) | 21300 | 2130 | 1800 | 1900 | 3000 |
| EBS2500 (D) | 27800 | 2780 | 2350 | 2490 | 4000 |
| EBS3000 (D) | 35500 | 3550 | 3000 | 3180 | 5000 |
| EBS3500 (D) | 41500 | 4150 | 3500 | 3710 | 6000 |
The term “low-NOx” describes the intended combustion category. It is not a universal emission guarantee.
A project emission schedule should identify:
Maximum permitted NOx
Maximum permitted CO
Particulate limit
Measurement units
Dry or wet gas basis
Reference oxygen percentage
Standard temperature and pressure conditions
Test fuel
Test firing rate
Applicable test method
Local permit requirements
Natural gas, light oil, and heavy oil should be evaluated separately. An emission result achieved with natural gas should not be presented as the result for heavy-oil operation.
Combustion adjustments must balance NOx with CO, unburned fuel, excess air, exhaust volume, and production performance. Reducing oxygen or flame temperature too far can produce incomplete combustion.
Commissioning should be carried out by qualified combustion, electrical, and plant-control personnel.
A typical procedure includes:
Verify burner mounting and alignment.
Confirm burner-head position inside the dryer.
Inspect the gas and oil fuel trains.
Check electrical supply and grounding.
Confirm fan rotation and airflow proving.
Test all plant permissive signals.
Verify the purge sequence.
Test ignition and flame detection.
Establish the low-fire point for the selected fuel.
Set fuel and air values across the operating range.
Measure dryer draft and exhaust temperature.
Test material temperature response.
Verify alarm, trip, and emergency-stop functions.
Record the approved settings.
Repeat the relevant process for each fuel mode.
Combustion measurements may include:
Oxygen
Carbon monoxide
Carbon dioxide
Nitrogen oxides
Exhaust temperature
Fuel pressure
Combustion-air pressure
Dryer draft
The final settings should be stored with the selected fuel, firing rate, production rate, aggregate moisture, and test conditions.
Inspect:
Regulators
Filters
Safety shut-off valves
Valve proving
Pressure switches
Flexible connections
Leak-tightness
Vent lines
Gas-system maintenance should follow the applicable local code and approved valve-train documentation.
Check:
Storage and transfer pumps
Filters and strainers
Fuel pressure
Nozzles
Atomizing components
Hoses and connections
Leak containment
A change in spray pattern or fuel pressure can alter flame shape and combustion readings.
Heavy-oil maintenance may also include:
Tank heating
Pipe tracing
Circulation
Viscosity control
Fuel-temperature sensors
Frequent filter cleaning
Carbon-deposit removal
Atomizer inspection
Allowing heavy oil to cool inside lines or components can cause blockage and difficult restarting.
Regularly inspect:
Flame detector
Ignition equipment
Fan and impeller
Air-pressure switches
Actuators
Electrical terminals
Burner head
Refractory interface
Mounting fasteners
Safety interlocks
Retuning should be considered after changing fuel, replacing a nozzle or valve, servicing the fan, modifying the dryer, relocating the burner, or observing abnormal emissions or fuel consumption.
The EBS-D can be evaluated for new plants requiring a defined low-NOx combustion strategy and access to more than one fuel source. Early coordination allows the dryer, burner, fuel systems, exhaust equipment, and controls to be designed together.
For an existing plant, compare the new burner with the original system’s:
Rated heat input
Flame dimensions
Burner opening
Support structure
Fuel pressure
Airflow requirement
Control voltage
Safety sequence
Available service space
A retrofit should not be treated as a direct replacement based only on burner capacity.
Plants exposed to changes in fuel price or availability may use the approved alternative fuel mode to maintain production flexibility. The site must have complete and compliant storage, preparation, supply, and safety systems for every selected fuel.
The EBS-D can be considered where the project requires a low-NOx burner category. Final suitability must be determined from the required emission value and project-specific performance evaluation.
For model and configuration review, provide:
Asphalt plant manufacturer and model
New installation or retrofit status
Dryer diameter and length
Combustion-zone dimensions
Burner opening and available space
Aggregate throughput
Average and maximum moisture
Inlet and discharge temperatures
RAP percentage
Available fuels
Fuel analyses and heating values
Gas pressure and flow capacity
Oil temperature and viscosity
Site altitude and climate
Baghouse and exhaust-fan information
Required emission limits
Electrical supply
Control-system interface list
The project documentation should define the burner model, approved fuels, fuel-train arrangement, installation dimensions, control interfaces, safety sequence, commissioning scope, and performance conditions.
FAQ
Not necessarily. The published information supports natural-gas, light-oil, and heavy-oil operating modes. Simultaneous blending should not be assumed unless a specific mixed-fuel configuration and control sequence are approved.
Fuel changeover should follow the approved burner management sequence. It may require load reduction, fuel shut-off, valve proving, purging, curve selection, and controlled reignition.
No. Fuel composition, particularly fuel-bound nitrogen, affects NOx formation. Natural-gas results should not be applied to light-oil or heavy-oil operation without separate test data.
The public page does not state a numerical NOx guarantee, reference oxygen level, or test standard. A project-specific requirement and performance condition should be agreed before ordering.
Compatibility depends on the approved light-oil specification, heating value, viscosity, sulfur content, supply pressure, and atomization system. Submit the fuel datasheet for review.
Not automatically. Heavy oil may contain more sulfur, contaminants, and fuel-bound nitrogen than natural gas. Local NOx, SOx, particulate, and opacity limits must be evaluated.
The page does not identify these figures as t/h. They should be treated as reference mixing plant specifications until the manufacturer provides the corresponding model definition.
RAP percentage affects heat transfer, moisture, exhaust conditions, and process design. Provide the RAP ratio and plant configuration for engineering review rather than assuming compatibility from burner output alone.
Provide the existing burner data, dryer drawings, burner opening, flame dimensions, fuel systems, fan and baghouse information, electrical supply, control signals, and required emission limits.
Yes. Each fuel has different flow, heating value, atomization, and air requirements. Approved fuel-air settings and combustion measurements should be established for every operating mode.
Contact Us
Plan Your Multi-Fuel Burner Project
Send us your dryer dimensions, aggregate throughput and moisture, available fuels, fuel analyses, site conditions and required emission limits. Our engineering team will review the EBS-D model and fuel configuration.
Provide the required NOx reference conditions and actual fuel data for an accurate technical review.
