Sulphur Dioxide

How Sulphur Dioxide is formed and controlled.

How is Sulphur Dioxide formed?

Many waste streams and fossil fuels contain sulphur. Sulphur is present in the waste stream from batteries, plastics, waste oil, and gypsum-filled wallboard. The sulphur is released into the combustion gases during incineration. The sulphur can react with the oxygen in the air to produce sulphur dioxide.

How is Sulphur Dioxide controlled?

The second stage of the gas cleaning process is the Spray Absorber. The combustion gases enter the vessel and an alkali is injected into the flue gas stream to neutralise any acidic gases. This neutralising process converts the gaseous sulphur dioxide into a solid sulphate form, which is then captured by the bag filters, forming part of the APCR.

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