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01/12/2005 MULTIPOINT TEMPERATURE MEASUREMENT IN REACTOR CATALYSERS  Exterior connections box for the CatTracker® system APLEIN INGENIEROS, S.A. and the American temperature manufacturer DAILY THERMETRICS have signed an agreement for the distribution of its CATTRACKER® equipment in Portugal and Spain. With its resistant aerospace design, the CatTracker® provides measurement systems with multipoint sensors and can offer a practically unlimited number of monitoring points within a reactor. These monitoring points can be located practically anywhere inside the reactor in order to increase the need for information in temperature control. The CatTracker® is designed with safety in mind and includes a containment chamber that permits continuous, uninterrupted operation, including during primary weld failure situations. The CatTracker® support structures are designed for quick, simple installation and, at the same time, to maintain integrity to withstand catalyser discharge - fall. By avoiding the complex, more costly “Wagon Wheel” systems required by competitive systems, we can provide less interference with the Dense Charge process. Our simple support structures also permit a large reduction in installation time, which leads to quicker putting into operation.  Various temperature measurement distributions with the CatTracker® system The Daily Thermetrics support structures are designed so that no bushing is unsupported. Delta T is the temperature difference ratio between the different points of a reactor. Reactor performance is not determined by simple temperature measurement, but instead, by the measurement of the difference in temperature readings between various points. The process engineers typically employ the Radial Temperature Profile information to detect: - Poor distribution: One side of the reactor flows faster than the other - Channelling: The flow through an area of less density in the catalyser is faster than in the rest of the process. - High-temperature points: where the exothermic reaction flows hotter than the reaction in the surrounding area. This temperature can cause this area in particular to flow at even higher temperatures which can lead to the process going out of control. - Determining catalyser wear: which parts of the catalyser react and which do not. For “hydrotreaters” and “hydrocrackers” in the refinery industry, this is accomplished using WABT numeric calculation. - Extinguisher-cooler operation.  Typical installation The more precise the Delta T measurement is for a process engineer then the available information on which to base a decision will be more exact. A typical thermocouple precision is ± ¾%, our CatTracker system complies with the accuracy of the “Special Error Limits”, which involve an accuracy of ± ?%. There is an aspect that is often ignored in new reactors and the choice of the radial temperature profile: the distance required by the system beyond the exterior border, with this distance affecting the exterior platform size. The reactor designers want the nozzles for the thermocouples at the edge of the reactor to reduce interference with the distribution tray, in addition, the lateral installation involves the construction of a maintenance platform and the costs of this platform increase exponentially with increasing diameter of the same; this diameter depends on a safety factor that requires some free distance beyond the Radial temperature Profile System limit and many times this safety factor corresponds to a distance of one metre. provides the “Reduced Space Design” option which reduces the exterior distance of our equipment to 406 mm. The CatTracker® system is accepted by most organisations worldwide that issue process permits. More news |
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