Product Guide

Introducing waste into the primary combustion chamber may be carried out manually or automatically with the choice usually determined by the capacity of the plant and the nature of the waste. Practically bagged waste can be manually loaded in an incinerator having a capacity of up to 200kg/hour.

Above the capacity it is generally considered unsafe, physically demanding and operationally/environmentally inefficient.

Above 200kg automatically loading should be considered as mandatory and below this capacity, optional.

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Our Surefire® range of incinerators are engineered to provide a safe efficient solution for the disposal of a wide range of wastes, such as hazardous, medical, animal, general and liquid waste streams.

The scope of supply includes, but is not limited to; Rotary combustion chambers, Fixed hearth units, Hot incandescent hearth units, Stepped hearth combustion chambers, Containerised incinerators, Mobile incinerators, Starved air gasification units, Thermal oxidisers, Sludge/liquid waste incinerators, Waste oil combustion plant and Waste to energy systems.

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The secondary chamber is where waste in the gaseous phase is treated. Combustion gases from the primary chamber are transferred into the secondary chamber via a refractory lined duct.

Where necessary, the design and volume of the chamber will be established by the development of a computer Fluid Dynamic Model using Phoenics 2008 combustion and chemical reaction software.

Constructed as a refractory lined steel structure, as per the primary chamber, additional combustion air is added at the inlet of the secondary chamber via a series of nozzles. Additional heat when required is also provided by an afterburner. Internal baffles and the location of the air jets will induce turbulence into the gases promoting intimate mixing of the combustion products, heat and combustion air.

The gases will reside in these conditions for periods in excess of 2 seconds, when complying with the EU Waste Incineration Directive 76/2000.

The result of this combustion is the reduction of partial combustion products (carbon monoxide) and contaminant combustion products (Nitrogen Oxides and Volatile Organic Compounds) to a minimum.

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Gases exiting the secondary chamber will be ducted directly into the waste heat boiler, which will convert the gaseous energy into useful energy such as steam or hot water.

Flue gases will enter the multipass gas tube boiler at a temperature of approximately 1000°C and exit at a temperature of 180°C. This temperature gradient will promote both maximum heat recovery and to enable the gas entrained heavy metals to be adsorbed by the downstream injection of activated carbon.

The boiler will be constructed to the latest applicable standards and will be heavily insulated and clad in aluminium.

The boiler will also incorporate the necessary level gauges, level switches, crown valves, safety valve, blow down vale and pump.

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To ensure compliance with the EU Waste Incineration Directive 76/2000, the exhaust gases will pass through the dry gas abatement plant.

This will comprise of a bag or ceramic filter house and a storage/feed system for the lime/sodium bicarbonate and activated carbon system.

Gases exiting the energy recovery plant will be injected with lime or sodium bicarbonate and activated carbon which is stored in bulk containers or silos adjacent to the gas cleaning system.

Within the gas stream the lime/sodium bicarbonate will react to neutralise the acid components within the gas such as sulphur dioxide and hydrogen chloride and the carbon will adsorb the heavy meals and any dioxins.

Dust from the combustion process and spent powdered lime/sodium bicarbonate and carbon will be collected on the abatement plants filters.

Periodically this residue will be released from the filters by compressed air, allowing it to be transported into a sealed container for disposal.

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The plant is controlled and policed by an all encompassing supervisory propriety human machine interface based control system.

The system will constantly monitor the plants performance and automatically trim and correct any out of tolerance parameter.

Interfaced with the emission monitoring package, the system will record, report and archive the emissions to atmosphere such as NOx, SO2, HCl, Particulates, O2, CO, H20, TOC, as well as the status of any alarms, charge cycles and system variables.

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