Author :
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (685 download)
Book Synopsis Sorbent Utilization Studies Using a Mini-pilot Spray Dryer. Final Report, 1 September 1992--31 August 1993 by :
Download or read book Sorbent Utilization Studies Using a Mini-pilot Spray Dryer. Final Report, 1 September 1992--31 August 1993 written by and published by . This book was released on 1993 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main body of the report consists of four parts: 1. additives to change process chemistry for SO2 absorption by Ca(OH)2 slurry; 2. recycle tests and hydration of fly ash with Ca(OH)2 to increase reactivity; 3. limestone as an alternative sorbent and additive effects; 4. physical and chemical model developments for some of the additive effects and spray dryer mathematical model application. As the concentration of SO2 in the flue gases increases, the SO2 removal efficiency will go down. Additives such as delinquent salts (NaOH, NaCl, and NaHCO3) have been shown to improve SO2 uptake, and these additive tests have indicated that SO2 uptake may be increased by as much as 60% over baseline conditions. Other additives such as H2O2, sugar, and some organic acids which can change the chemical reaction processes are suggested and tested, and some promising results have been obtained. Recycle has been shown to increase sorbent utilization by allowing partially reacted sorbent to react further with the SO2 in the flue gases. Two types of Ohio coal fly ashes have been extensively studied, and improvement of utilization in spray dryer flue gas desulfurization has been demonstrated. Limestone represents an area where significant cost savings can be realized. The spray dryer tests were designed to provide some results for understanding the magnitude of the limestone performance in the spray dryer system and the additive effects. The additive effects on increasing SO2 absorption by Ca(OH)2 slurry were investigated, and the chemical and physical properties of these tested additives were studied. Some models have been formed to explain the additive phenomena.