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Technology Diagram Key:
Air Quality
Turbine and Generator
Syngas Burner & Energy Utilisation
Entech Low Temperature Gasifier
Incoming waste inspection

1: Incoming waste inspection

Incoming waste is inspected and piled within easy reach of the grapple. The grapple carries loads of waste into the feeding device of the gasifier. Feed is not shredded or crushed, as the grapple and gasifier can accept very large items.

2: Entech Low Temperature Gasifier

The waste enters the gasifier via the feeding device. This has an air-lock system, allowing waste feed without escape of fugitive emissions or ingress of air. The gasifier heats the waste to the required temperature (600 – 875°C) and introduces small amounts of air and steam. The air and steam chemically convert the waste from a solid to a synthetic gas or 'syngas'. The syngas rises and exits at the top of the gasifier. All that remains of the waste is an inert ash. This ash exits at the end of the gasifier and is cooled before being sealed in bins.

3: Syngas Burner & Energy Utilisation

The syngas burner receives the syngas and fires it. This high efficiency burner releases all the energy from the syngas to make a hot combustion gas stream. This hot combustion gas is then passed through a boiler to generate steam.

4: Turbine and Generator

The steam from the boiler is sent to the steam turbine and generator system to make electricity. Some of this electricity is returned to the plant to run the process. The majority of the electricity is exported to the local electricity network for supply to homes and businesses.

5: Air Quality

After passing through the boiler, the combustion gas has cooled down. It is sent through two cleaning stages. The first stage removes acidic gases like sulfur dioxide, by injecting lime to absorb them. The second stage removes any metals that have carried into the gas, by injecting activated carbon to adsorb them. The cleaned combustion gas is now largely carbon dioxide and water vapour. It is safely exhausted to atmosphere via the stack.