University of Technology-IraqEngineering and Technology Journal1681-6900311520130901Reduction of Chemical Effects of Swelling and Shrinkage Phenomenaon of a Boiler in Steam Power Plants Using Silicon Antifoam296029818327510.30684/etj.31.15A.12ENRaheek I. IbrahimJournal Article20130901The swelling /shrinkage are complex phenomenon in the steam power plants.<br /> One of the important reasons is the chemical effects, which causes a bubble<br /> formation and hence serious foaming carryover problems in the boiler. The present<br /> work is devoted to study and measure the chemical effects of the swelling and<br /> shrinkage phenomena due to the disturbance of the variables in the drum boiler of<br /> steam generation unit. The problem was studied and analyzed to find a suitable<br /> solution to reduce the foaming carryover, and hence to control the swelling and<br /> shrinkage phenomena. The theoretical part is describing the mathematical model<br /> for the boiler variables. The drum pressure and drum level at different load<br /> demands of boiler were measured experimentally. The feed water was treated<br /> carefully in order to study the reduction of foam produced from a small amount of<br /> lubricant oil in the boiler water. The foam was treated using silicon antifoam [SN<br /> 6010]. The experimental results proved that the silicon antifoam is efficient to<br /> remove the foam completely and then reduce the disturbance in the pressure by<br /> 18.6% and the reduction in swelling and shrinkage was by 29.4%, and 16%<br /> respectively.https://etj.uotechnology.edu.iq/article_83275_090a9ad492568e7c31ab37fa420393fe.pdf