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Improve lime mud kiln operation. By accurately sensing and controlling mud moisture
A Lime Mud Kiln consists of three sequential operating zones drying, heating, and calcining. To achieve proper calcination, lime is subjected to the calcining temperature for a certain length (time) of the kiln. Since calcining is the final zone, any deviation from its required length causes variations in finished lime carbonate content. If mud moisture disturbances entering the drying zone are not effectively controlled, they will be transmitted through the kiln to the calcining zone, thus producing under or over-calcined lime. Consequently, the best moisture sensing and control technology should be considered for inclusion in the overall kiln control system. Although the (cet) method controls in the right direction, it carries two major problems that render it ineffective (1) poor correlation between (cet) and mud moisture, and (2) no precise method is available for automatically adjusting the (cet) for evaporative load disturbances. Fortunately, a highly effective moisture sensing and control system is available that solves these two problems. It has been validated by numerous applications on industrial dryers. This technology is explained, a trial run on a lime kiln is briefly discussed, and a recommendation to include it in all kiln control system is made.
Improve lime mud kiln operation. By accurately sensing and controlling mud moisture
A Lime Mud Kiln consists of three sequential operating zones drying, heating, and calcining. To achieve proper calcination, lime is subjected to the calcining temperature for a certain length (time) of the kiln. Since calcining is the final zone, any deviation from its required length causes variations in finished lime carbonate content. If mud moisture disturbances entering the drying zone are not effectively controlled, they will be transmitted through the kiln to the calcining zone, thus producing under or over-calcined lime. Consequently, the best moisture sensing and control technology should be considered for inclusion in the overall kiln control system. Although the (cet) method controls in the right direction, it carries two major problems that render it ineffective (1) poor correlation between (cet) and mud moisture, and (2) no precise method is available for automatically adjusting the (cet) for evaporative load disturbances. Fortunately, a highly effective moisture sensing and control system is available that solves these two problems. It has been validated by numerous applications on industrial dryers. This technology is explained, a trial run on a lime kiln is briefly discussed, and a recommendation to include it in all kiln control system is made.
Improve lime mud kiln operation. By accurately sensing and controlling mud moisture
Verbesserung der Leistung des Laugenschlammofens durch genaue Messung und Regelung der Schlammfeuchtigkeit
Robinson, John (author) / Douglas, Roger (author)
TAPPI PEERS Conference, 2011 ; 643-655
2011
13 Seiten, 6 Bilder, 1 Tabelle, 5 Quellen
(+ 13 Folien)
Conference paper
English
Infrared sensing transmitter may improve kiln operation
| Tema Archive | 1995
| Engineering Index Backfile | 1951