| Popis: |
Part of the sugar manufacturing process is the concentration of raw sugar or thin juice using multiple effect evaporators. Condensate from. the multiple effect evaporators is commonly used as make-up water to a boiler. Occasionally, juice will mechanically carry over into the boiler condensate system, resulting in a "sugar shot". Immediate detection and notification of a "sugar shot" is critical because sugar juices break down fonning organic acids in the boiler, which rapidly depress boiler water pH causing corrosion. Sugar process evaporators and sugar pan 'boilers use cooling water to maintain vacuum for low temperature operation. The cooling section is open to the process, so sugar contamination can occur during upset conditions. Immediate detection and notification of a sugar contamination of cooling water is critical to prevent microbiological fouling in the cooling system. A fluorescence method developed by Nalco is able to detect sugar contamination in an early stage by measuring naturally occurring non-sugars in the juice that have fluorescent properties. Now this technology has been upgraded on the 3D 'fRASAR platfonn with the advantages of low cost, low maintenance, ease of use and calibration. Laboratory tests and field evaluations have shown that the new 3D TRASAR for Sugar technology can improve boiler corrosion and deposit control with continuous real-time monitoring and diagnostics. This results in safer operation, improved system reliability, and reduced operating costs. Laboratory and field trial data will be presented in this paper. |
