Capture at the Source
Dedicated headers collect gases from evaporators, digesters, chip bins, tanks and foul-condensate stripping equipment while limiting fugitive release.
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A.H. Lundberg Process Technology
NCG
INCINERATION
SYSTEM
Collect, condition and safely destroy kraft mill non-condensable gases in one coordinated system—with automated protection, optional heat recovery and downstream flue-gas treatment.
CNCGConcentrated gas handling
DNCGDilute gas handling
~850°CTypical combustion duty
One SystemControls, safety & recovery
One Coordinated Solution
From odorous gas source to treated stack gas.
Kraft mill NCG streams can contain reduced sulphur compounds, methanol and turpentine. The system is engineered around their corrosive, toxic and potentially flammable nature—not simply around the burner.
Closed condensate drainage
Stream-specific conditioning
Automatic purge and diversion
Heat recovery integration
Simplified system architectureCOLLECT → CONDITION → DESTROY
01 / SOURCESCNCG · DNCG
Chip Bin · SOG
Chip Bin · SOG
→
02 / CONDITIONCool · Separate
Heat · Motivate
Heat · Motivate
→
03 / INCINERATEControlled combustion
& burner management
& burner management
04 / RECOVERWaste heat boiler
→
05 / TREATQuench · SO₂ scrub
Process Overview
Six linked functions, engineered as one operating system.
Each gas category receives the collection method, moisture control and protection philosophy suited to its pressure, concentration and ignition risk. The complete package is coordinated through the burner management and plant control system.
Cool & Remove Moisture
Coolers and mist eliminators reduce water loading. Condensate drains to a closed foul-condensate system for controlled handling.
Motivate Safely
Steam ejectors typically move concentrated gas; spark-resistant fans and LEL monitoring support dilute-gas transfer and control.
Destroy TRS & Organics
Fuel, primary air and secondary air are managed for stable temperature and complete combustion across changing NCG loads.
Generate Useful Steam
Hot flue gas can pass through a waste heat boiler, converting available thermal energy into plant steam before final treatment.
Quench & Scrub
A high-alloy quench and staged scrubber cool the gas and remove acid-gas loading before discharge or downstream treatment.
NCG Stream Categories
Different streams. Different collection strategies.
The design basis separates high-concentration, low-volume sources from high-volume, low-concentration sources. Chip-bin and stripper-off-gas duties can receive dedicated conditioning and protection.
Concentrated NCG
Low-volume, high-concentration gas commonly motivated by steam ejector and protected by purging, flame arresters and pressure relief.
Dilute NCG
High-volume, low-concentration gas cooled and dehumidified before spark-resistant fan transfer, monitoring and incineration.
Chip-Bin Gas
A variable stream that can require dedicated collection, moisture removal and controlled delivery to the selected destruction point.
Stripper Off-Gas
A methanol-rich stream suitable for dedicated conditioning and controlled combustion, or upstream methanol recovery where justified.
Safety by Design
Protection extends from every source to every incineration point.
Interlocks continuously confirm flow, pressure, temperature, equipment readiness and purge conditions before gases are admitted.
Discuss Your Design Basis →Automatic DiversionGas is diverted when the selected incineration point or transfer equipment is unavailable.
Purge SequencesSteam or air post-purging clears transfer piping during shutdown and changeover.
Flame & Pressure ProtectionFlame arresters and rupture disks protect concentrated-gas collection and injection points.
LEL MonitoringCombustible-gas monitoring supports safe dilute-gas handling and protective action.
Grounding & MaterialsGrounded piping and corrosion-resistant metallurgy address static and aggressive condensates.
BMS & HAZOPBurner management, permissives and hazard review are integrated into the control philosophy.
Typical Integrated Scope
More than an incinerator.
The package is configured around mill sources, available destruction points, fuel strategy, steam conditions, emission targets, plot constraints and plant tie-ins.
Collection & Conditioning
- NCG coolers and mist eliminators
- Steam ejectors and spark-resistant fans
- Foul-condensate drains and collection
- Gas heaters and transfer piping
- LEL monitoring and purge systems
- Flame arresters and rupture disks
Destruction & Recovery
- Refractory-lined NCG incinerator
- Low-NOₓ multi-fuel burner
- Fuel train and burner management
- Waste heat boiler and steam system
- High-alloy quench vessel
- Flue-gas scrubber and stack interfaces
Start With the Source List
Define a safe, integrated NCG strategy.
Share gas sources, flow and composition, available incineration points, utilities and emission targets with our engineering team.