Award as “Low Carbon Model Company of the Year”
Incinerating fuels containing sulphur produce sulphur dioxide and sulphur trioxide in the flue gases, which must be removed before the flue gases are released into the atmosphere. Coal-fired power stations and incinerations using heavy fuel oil produce a particularly large proportion of these sulphur compounds. Thanks to our proven technologies, we can now remove 95 - 99% of sulphur from flue gases.
Sulphur dioxide (SO2) is an acidic gas and can be chemically bound to alkaline sorbents. Due to their wide availability, calcium (Ca) and sodium (Na) are particularly suited to industrial gas cleaning, and in special applications also ammonia (NH3). Limestone (CaCO3) is available almost all over the world, which is why most plants favour the use of lime products such as CaCO3, CaO and Ca(OH)2 as sorbents.
There are more than 100 methods of flue gas desulphurisation. At Steinmüller Babcock Environment we use only the best technologies. Our methods for acidic pollutant gas removal can be divided into dry, semidry and wet processes. The purely dry process, Circusorb, is more suitable for waste incineration plants and is not offered for industrial power plants. A much better alternative is the semidry method, using rotary atomisers and atomiser nozzles. In terms of wet methods, we offer spray tower scrubbers as single-loop absorbers, dual-loop absorbers and as through-pass absorbers, based on seawater.
A major advantage of the dry method is the small amount of investment needed. In contrast, however, it requires a relatively large consumption of highly reactive sorbents, and the resulting reaction product is a solid deposit. The input material and product disposal lead to relatively high operating costs, so that the method is preferred as an economical option for removing smaller quantities of pollutant gas or for plants with a short service life. The semidry method is suitable for plants up to approx. 1 million Nm³/h, with lower investment costs. With our technology we achieve very good absorbent stoichiometries, in other words we can exploit the available absorbents ideally for removal by means of the type of injection. In contrast to dry and semidry processes, wet methods work with a much more favourable reaction efficiencies. In addition, the use of limestone as an absorbent, which contains calcium, generates a marketable gypsum as a product that can be used widely in the construction materials industry.
There is a perfect solution for every plant – depending on the individual, location-specific requirements. We at Steinmüller Babcock Environment will find it for you!