Function

The highly acidic flue gases from waste incineration are completely neutralised in the intervex reactor, leaving a gas with negligible corrosive effect. The process is finished in a conventional textile filter in which. active carbon is injected to eliminate the last traces of dust, dioxins, mercury and cadmium at a ptemperature of 80 degrees celsius. At this low temperature and with flue gases without acidic components, a low cost textile filter will function effectively for many years. The active carbon will have a very high efficiency and the consumption of active carbon will be extremely low.

Waste from the Intervex reactor

The dry method is the easiest way to handle the waste products from the reactor. As the stones are released at the bottom of the reactor, dry, powdered material is sieved away from the stones and deposited. The powder contains fly ash, gypsum, calcium chlorides and other reaction products including heavy metals. As the yield of the limestone is extremely high, the amount of waste will be comparatively low.

As an alternative, the waste material can be taken out as sludge. In this case the outgoing stones are sieved in a wet system with a water spray over the sieve. The water-soluble calcium chloride will go to drainage and the non-soluble waste will be concentrated to sludge in a centrifuge. The wastewater must pass through a sand filter and an active carbon filter. The advantage of the wet system is that highly hygroscopic calcium chloride is eliminated from the deposit.

Waste from the textile filter

This waste contains a small proportion of fly ash plus active carbon including dioxins and heavy metals. This waste can be re-circulated to the furnace to destroy the dioxins or it can be deposited with the waste from the Intervex reactor.

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