Catalog excerpts


In use successfully with ­SITRANS TO500: Background information The reliable determination of the temperature profile within the catalyst filling is of crucial importance in the catalytic conversion of gases in tube and tube-bundle reactors. It has a great influence on: • the course of the reaction • the quality of the conversion • the aging process of the catalyst The identification of hotspots – areas with excessive temperatures that move around within the filling – plays an important role. In use at Evonik in Marl, Germany To meet this requirement, Siemens developed the SITRANS TO500 multipoint measuring system, which is being used successfully by Evonik in Marl. On account of the small diameter of the reaction tubes, the required number of measuring points and speed at which the values had to be measured, the use of conventional measuring technology was only possible to a limited extent. Together with Siemens, Evonik therefore decided to use fiber-optic temperature sensing: “The detailed recording and visualization of the complete temperature profile in the reactor enables our plant personnel to detect not only the development of hotspots in good time but also the effectiveness of the catalyst. In the first scenario, we use this information to initiate measures to reduce the temperature. In the second scenario, we can perform maintenance procedures, such as replacing the catalyst at the exact time it becomes necessary due to aging.” Sensor in stainless steel cannula Measurement point The use of fiber-optic sensors in m ­ easuring procedures is new in the chemical industry. Siemens AG Process Industries and Drives Östliche Rheinbrückenstr. 50 76187 Karlsruhe, Germany The advantages of the new system at a glance: • immune to electro-magnetic ­influences • coupler can be easily disconnected for maintenance • chemical resistant • measuring lance can be simply drawn out and rolled up • cable coupling points located directly on the reaction vessel Fiber-optic cable Article No. PDPA-B10203-00-7600 Dispo 27900 Printed in Germany © Siemens AG 2016 Changes and errors excepted. The information provided in this document contains merely general descriptions or performance characteristics which in case of actual use do not always apply as described or which may change as a result of further development of the products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of contract. All product designations may be trademarks or product names of Siemens AG. All other names in this document could be trademarks, third parties using them for their own purposes could infringe the rights of the trademark owners. SITRANS TO500 The fiber-optic sensor – measuring what used to be

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SITRANS TO500 The extremely thin multipoint ­measuring system Simple installation and c ­ ost-effective transport due to rolled-up measuring lance Measured values are transmitted through the extremely thin sensor measuring lance. The ­ iameter of the sensor measuring lance is d independent of the number of measuring points. Technical specifications Input FBG (Fiber Bragg Grating) temperature measuring lances Measuring range Function of the SITRANS TO500 Do you want to install a very large number of measuring points in the smallest possible space with a low thermal mass? The fiber optic...

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