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The Ecotube System

Technical overview

The Ecotube system represents an innovative cost-effective optimisation tool for combustion processes and principally comprises retractable lances - Ecotubes - that are equipped with injection nozzles. Various agents can be introduced through the nozzles at high pressure and velocity into the furnace media. The Ecotubes are strategically positioned within the furnace enabling the injected agents to create a radically improved mixing of the combustion products, resulting in destruction of laminar gas columns and the formation of completely mixed turbulent flow patterns.

Watch our Flash Movie of the Ecotube system

Ecotube system advantages by comparison with other emission abatement techniques:
- Engineered for retrofit applications
- Lower plant operation costs
- Radically improved turbulence and mixing of combustion gases
- Reduced NO_x, CO, SO_x, HCl and particles in the flue gas
- Lower stoichiometric ratio (less excess air) in the furnace
- Increased thermal efficiency
- Increased load capacity
- Lower ID fan motor absorbed power
- Reduced boiler-wall metal corrosion
- Reduced erosion of boiler convective surfaces
- Minimum unit down time (3-4 days) needed for installation
- Lower maintenance costs
- No large ducts or furnace modifications required

THE ECOTUBE SYSTEM.

Results from our installations

The first Ecotube System was installed in 1995 and has been installed in Waste to Energy boilers (10-85 MWth), Biomass and Coal boilers (25-270 MWth)

Ecotube Experience List

Installation Results:
- 30-90% NO_x reduction
- 30-90% CO reduction
- 10-30% reduction of flyash
- 5-10% increased boiler load
- Reduced maintenance costs

Why use Ecotube technology?

Common combustion problems WITHOUT Ecotubes

Combustion Problem Areas are:

• Poor mixing/laminar flue gas flow

• Uneven temperatures and gas velocities

• Non utilized furnace volumes

• High NO_x

• Frequent CO spikes

• High SNCR reagent consumption

• High ammonia slip

Combustion WITH Ecotubes

Financial Benefits

• Increased waste throughput

• Increased steam flow

• Reduced flue gas flow

• Reduced fly ash carry-over

• Reduced flue gas temperatures in convection pass

Environmental Benefits

• Reduced emissions of NO_x, SO_x, CO, NH₃ and CO₂

• Increased residence time in temperatures >850°C

• Radically improved mixing

• Distruction of laminar gas content

• Reduced NO_x, CO, SO_x, HCL and particles

• Lower stoichiometric ratio possible

Click here for a fullscreen view of the Ecotube-system (One level SNCR)

Four unique basic packages designed for every application:

A Ecotube assemblies
B Control System
C Air supply system
D Cooling water system
E Injection nozzles

Each Ecotube is fitted with:

	transmission drive to insert and retract the Ecotube
	cleaning mechanism for automatic removal of furnace deposits from the Ecotube surface

Click here for a fullscreen view of the Ecotube-system (Two levels SNCR)

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		Download an Ecotube system brochure (1)
		Download an Ecotube system brochure (2)