Green’s designs, manufactures, services and supplies spares for economisers for industrial uses, power stations and marine vessels to enhance efficiency, reduce energy usage, lower emissions and cut costs.
What are economisers?
Economisers enable the waste heat generated by boilers to be captured for a range of applications.
We design and fabricate economisers in our factory in Wakefield, where we’ve been manufacturing since 1845 when our founder Edward Green patented his design. Every one of them is bespoke to meet our customers’ specific needs and operational requirements.
A common application of economisers in steam power plants is to capture the waste heat from boiler stack gases (sometimes known as flue gas) and transfer it to the boiler feedwater. This raises the temperature of the boiler feedwater, lowering the needed energy input, in turn reducing the firing rates needed for the rated boiler output. Economisers lower stack temperatures which may cause condensation of acidic combustion gases and serious equipment corrosion damage if care is not taken in their design and material selection. To avoid these problems we recommend regular inspections so that potential problems are identified and rectified before they become performance issues which affect business efficiency.
How are economisers used?
Power stations, whether they are coal-fired, waste to energy or biomass plants, benefit from increased efficiency by using Green’s economisers which enables them to produce more electricity or reduce their fuel consumption.
Industrial plants such as pulp and paper or steel mills, chemical producers and food processors use our economisers to take pre-heat boiler water to produce hot water or steam water for various on-site uses such as drying ovens, kilns, heating, sterilisation, cooking and electricity generation for their own use or to export to the grid as an additional revenue stream.