Confined Space Survey for Boilers and Flue Stacks in Energy from Waste Plants
How Elios 3 Drone Technology Delivers Safer, Faster Internal Inspections
Energy from Waste (EfW) plants rely on high-performance equipment operating under extreme conditions. From the boiler’s first gas pass to the flue stack, these systems demand regular inspection to ensure structural integrity, thermal efficiency, and regulatory compliance.
At DJM Aerial Solutions, we deliver precise, risk-free confined space surveys using the Elios 3, the most advanced drone platform available for internal asset inspection. From the depths of boiler chambers to the vertical heights of flue stacks, our confined space surveys provide high-resolution, actionable data—without putting human life at risk.
Why Confined Space Survey Is Essential for EfW Plants
Traditional inspections of boilers and gas stacks often require full asset shutdown, scaffolding builds, manned entry permits, and significant downtime. Even then, visibility is limited and conditions are hazardous.
Using the Elios 3, we access and inspect internal spaces remotely—capturing every surface, weld, and seam with precision. This not only mitigates risk, but also dramatically reduces inspection time and cost.
Boiler Inspection: Gas Pass 1, 2, and 3
EfW boiler systems typically feature a multi-stage gas pass setup:
Gas Pass 1 – High heat zone, subject to intense thermal stress
Gas Pass 2 – Transitional area, where flow slows and deposits build
Gas Pass 3 – Final heat extraction stage, vulnerable to soot accumulation and corrosion
Each pass must be inspected for:
Lining degradation
Thermal distortion
Blockages or slag buildup
Weld integrity
Refractory damage
With the Elios 3, we conduct complete visual and spatial documentation of each gas pass—flying into the heart of the boiler with real-time FPV control, 4K video, and onboard lighting.
Confined Space Survey of Waste Gas Flue Stacks (Scrubbers)
Waste gas stacks, also known as scrubbers or flue stacks, are vital components in the emissions control chain. After combustion, residual gases pass through these stacks where they are filtered, cooled, and safely vented.
Common failure points include:
Lining failure or chemical attack
Weld defects
Soot and residue buildup
Condensation damage
Structural misalignment
Inspecting these components manually is often impractical and dangerous. Using the Elios 3, we provide full internal visualisation and LiDAR mapping from base to tip—without scaffolding or confined space entry. This allows your engineering team to assess internal condition quickly and safely and plan corrective action where needed.
Benefits of Using Elios 3 for Confined Space Surveys
Zero human entry into hazardous environments
No scaffolding or rope access required
4K stabilised video and high-resolution stills
10,000 lumen onboard lighting for total darkness
LiDAR spatial data for internal 3D mapping
FPV control for precise navigation
Rapid mobilisation and fast reporting
Ideal for shutdown or turnaround projects
Why This Matters for Energy from Waste Operators
EfW plants operate under strict safety and environmental regulations. Missed defects in high-risk areas like boilers or stacks can result in costly unplanned outages, equipment damage, or environmental compliance breaches.
With confined space drone surveys, you get:
Full visibility of internal asset health
Clear documentation for regulators or insurers
Smarter maintenance planning and budgeting
Minimized downtime and labour costs
A digital audit trail for every inspection cycle
Our Approach
At DJM Aerial Solutions, we work closely with your operations and maintenance teams to plan each inspection. We assess access, atmospheric safety, and risk before deploying the Elios 3 into the asset. Surveys are typically completed in a single shift, with reports delivered within 24 to 72 hours.
Deliverables include:
4K footage and still images
Annotated video timeline
Visual defect tags
LiDAR point cloud or 3D model (on request)
Full condition report and media package
Frequently Asked Questions About Drone Surveys
A confined space survey is the remote inspection of internal, enclosed, or hazardous spaces using specialised drone technology like the Elios 3.
Each gas pass is subject to different temperatures, pressures, and flow rates. Inspections ensure that refractory linings, welds, and surfaces are intact and operating safely.
It’s a vertical structure used to discharge treated exhaust gases safely into the atmosphere. In EfW plants, scrubbers also remove pollutants before release.
Lining failure, weld cracking, soot accumulation, corrosion, condensation damage, and structural misalignments are all common defects.
The Elios 3 flies directly inside the boiler chambers with no human entry, capturing high-resolution images, 4K video, and LiDAR data for full condition reporting.
Yes. The Elios 3 is operated remotely, eliminating the need for confined space entry, scaffolding, or rope access.
You’ll get 4K video, still images, annotated reports, optional 3D models or point clouds, and clearly tagged defects for each asset inspected.
Most inspections are completed in a single shift, including flight, data capture, and debrief. Reports are delivered within 24–72 hours.
Yes. Boilers, flue stacks, and scrubbers must be safely isolated and gas-free prior to drone entry for inspection.
Yes. DJM Aerial Solutions provides nationwide coverage with rapid mobilisation for both scheduled and emergency inspection work.
Book a Confined Space Survey Today
If you operate an Energy from Waste facility and need to inspect boilers, stacks, scrubbers, or pressure vessels, our confined space drone survey service offers a faster, safer alternative to traditional methods.
Contact DJM Aerial Solutions today to discuss your requirements or request a quote.