This is also required by the specified “proof test” for SIL capable thermcouple systems. A high-temperature verification test allows for a diagnostic check of the thermocouple, wiring, and transmitters, as well as a confirmation of signal output. That’s where the Gayesco Flex-R ® multipoint thermocouple comes in. Each system is designed with the optimal thermocouple distribution specified by each process licensor for a particular reactor vessel and application, and every installed thermocouple can be verified by a test heating to 700☏ (371☌) – both at the factory and in the field. The ideal way to guard against the potential for a thermal runaway is with accurate, near-real-time temperature monitoring in key areas of a reactor vessel. Gayesco Flex-R ® Multipoint Thermocouple Enables Accurate Reactor Temperature Profile Data Another solution is to reduce the feed rate, which slows down the rate of treating. One solution is to quench with cold hydrogen in order to reduce the inlet temperature, which slows down the rate of cracking. By monitoring the temperature in several zones within the reactor vessel, operators can see when conditions veer outside of the safe range and then adjust the inlet conditions as necessary. Problems occur when this process is not controlled or happens too quickly within the catalyst bed – a situation that can lead to catastrophic vessel failure as the temperature exceeds the design limits of the steel. This process normally occurs within a safe temperature range. As more feed cracks, more material is available to treat, which generates the heat that allows more material to crack, and so on. Treating is a highly exothermic reaction. Thermal Runaways in Hydrocracking Processes The cracked hydrocarbons are then saturated or treated with hydrogen to produce useful products like diesel and jet fuel. In this two-stage chemical reaction, heavy gas oil is broken down (cracked) using a catalyst and high temperatures. Hydrocracking is one of the processes where real-time temperature monitoring is essential. Many of these processes require close temperature monitoring to maintain optimal reaction conditions and to detect potential failures. Temperature measurement is an increasingly important part of many industries today, and this is particularly true in the refining and petrochemical sectors. Comprehensive, real-time temperature monitoring is critical to preventing runaways, which is why most hydrocrackers across the world are equipped with Gayesco Flex-R ® multipoint thermocouple systems by WIKA. Thermal runaways in hydrocracking processes are a serious concern for refiners.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2022
Categories |