The state-of-the-art precipitator will cut dust emissions by 90%.
It represents an investment of £3.8m and is a bespoke system manufactured in the UK. It works by extracting dust from gases produced in the cement kiln and has been installed on the plant’s exhaust duct to provide a physical barrier to the dust as it passes from the kiln to the chimney.
Static electricity is generated in the precipitator and gives the dust particles a negative charge. The dust particles pass through positively charged conducting plates to which they are attracted to form a layer. The positive plates are then gently rapped so that the collected dust falls to the bottom of the main hoppers from where it is transported to the dust handling plant for reuse.
The enhanced reduction in dust at the plant and increase in the use of alternative fuels to traditional fossil fuels burnt in the kiln combine to help make cement production more sustainable. Over a three day period in March 2011 the plant set a new record of using 100% alternative fuels.
The alternative fuels used at South Ferriby are secondary liquid fuels (SLF) made from industrial liquid wastes that cannot be recycled and Climafuel, made from domestic, commercial and industrial waste that would otherwise typically go to landfill.