Hamon Enviroserv

Paper on selection of best FGD technology for Africa

Paper on selection of best FGD technology for Africa

Aug 10, 2016

July 20, 2016, at Power-Gen Africa, Rüdiger Baege - Senior Sales Manager specialized in Flue Gas Cleaning, from Hamon Enviroserv in Essen,Germany - gave a lecture on FGD Technology, as part of the ‘Emissions Control Technologies’ session.
The full paper, written by Mr Baege in collaboration with Mr Andrew Twyford from Hamon South Africa, can be downloaded here:
 Selection of best FGD Technology_Paper for Power-Gen Africa 2016


Please find the abstract below:
Along with hydro power, coal will remain one of the most important sources of energy in Africa for the foreseeable future. Coal does however bring with it the price of negative environmental impact. This necessitates further installations and the continuous improvement in the efficiency of de-dusting, denitrification and desulphurization equipment used on coal-fired plant, as emission limits become increasingly stricter.
Flue gas desulphurization (FGD) technologies were mainly developed in the 1970’s and ‘80’s in Europe (Germany), America (US) and Asia (Japan). Different types of FGD technologies have emerged over time as a result, an overview of which will be presented in this paper.
The most widely installed FGD technology throughout the world is currently wet limestone desulphurization (WFGD). In order to fulfil the requirements of ever stricter emissions legislation, wet ESPs for SO3 and dust removal need to be installed downstream of a WFGD. This arrangement has already been implemented in a number of power plants and has demonstrated a significant increase in capital and operation costs.
Semi-dry FGD technology, based on circulating dry scrubbing (CDS), has now been further developed and is proving to be highly effective in meeting today’s (and future stronger) emission requirements. Two major advantages of this technology are the total removal of SO3 and the high removal efficiency for mercury without the addition of activated carbon. To ensure that particulate emissions are sufficiently low, a bag filter is installed downstream of the CDS.  
This paper presents a general overview of different FGD technologies including their advantages and disadvantages. Furthermore this paper will highlight the considerable experience which has been gained from power plants and international plant designers over the last 20 years. This paper is intended to be informative when decisions regarding the future implementation of FGD in Africa are made.

For further information about FGD technology, feel free to contact us here.