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Desal plant to cut toxic emissions

The Saline Water Conversion Corporation (SWCC) plans to introduce the clean development mechanism (CDM) for the fourth phase of the Jeddah power and desalination plant to reduce harmful gas emissions, a top SWCC official said here Thursday.
CDM is one of the mechanisms defined in the Kyoto Protocol to help industrial plants reduce emission levels, in line with the goals set out in the United Nations Framework Convention on Climate Change.
Osman Al-Najdi, director general of technical affairs and production, said: "The proposed Jeddah project aims to reduce the emission of greenhouse gases by increasing the efficiency within five boilers by applying the Therma Chem FS12 (FS12) fireside treatment technology to the combustion process."
"FS12 is an on-line post-combustion technology designed for in situ cleaning of steam boilers' internal components to prevent the accumulation of fireside deposits which lead to a decrease in the overall thermal efficiency of boilers," he said.
Al-Najdi said FS12 treatment, which consists of continual injection of the technology into the combustion chamber of boilers, through a specially designed atomizing system, is not a fuel additive and has no effect on the combustion efficiency of fuels.
He said a test trial of FS12 was performed on one of the boilers (No. 13) of the plant from Sept. 20, 2011 to Nov. 21, 2011. The result indicated that the application of FS12 increased the thermal efficiency of a boiler by 6 to 8 percent.
The fourth phase of the Jeddah power and desalination plant, which is located on the west coast near a residential area, requires more advanced technology for emission reductions.
It consist of five thermal units, 10 desalination units, five heavy-fuel oil-based natural circulation, radiant type boilers with a design steam output capacity of 605 t/hr of steam per boiler and a heavy fuel oil consumption of 38.5 t/hr per boiler, Al-Najdi said.
He said the process is used for water desalination and electricity generation, with an electric capacity of 118MW per turbine.

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