OCM reactor temperature monitoring system based on FBG sensor

Abstract

The invention discloses an OCM reactor temperature monitoring system based on an FBG sensor. The OCM reactor temperature monitoring system comprises a broadband light source module, a tunable F-P filter module, a coupler module, a sensing grating array module and a photoelectric detector module, and is characterized in that the broadband light source module is mainly a high-stability light sourcedesigned for scientific research and industrial production, a high-power and wide-spectrum SLD (SLED) module is arranged in the broadband light source module, and aiming at the specificity of an SLD (SLED) laser, the special protection measures are adopted in the circuit design and optical path processing, so that the sudden change of the current and voltage and the damage of the returned light tothe SLD laser are avoided, and the light source can work for a long time stably and safely. The ultrahigh-temperature grating FBG is connected in series to be applied to the temperature monitoring ofa methane oxidative coupling reactor, the distribution monitoring of a temperature field in the reactor is achieved, and the advantages of an optical fiber sensing technology are fully utilized to directly monitor the temperature of the reactor with high precision.

Description

technical field [0001] The invention belongs to the field of petrochemical production process monitoring, in particular to an OCM reactor temperature monitoring system based on an FBG sensor. Background technique [0002] At present, more than 90% of ethylene in foreign countries comes from the cracking of naphtha and ethane, while in China, it mainly comes from the cracking of naphtha and methanol. The production process of this kind of cracking furnace is complex and the production cost is relatively high. With the increasing shortage of petroleum resources, domestic and foreign researches have begun to use new raw materials and new processes to produce ethylene. The most representative of which is the oxidative coupling of methane. Ethylene technology, which uses methane in natural gas as a raw material, can convert methane into ethylene in only one reaction process. If large-scale industrial production can be realized, it will break the bottleneck of raw material sources...

AI Technical Summary

Problems solved by technology

In actual use, in order to prevent the temperature sensor from being eroded, the surface thermocouple is generally used to measure the temperature on the outer surface of the reactor. Although this temperature measurement method solves the erosion problem, the temperature lag and the influence of the external temperature difference are both It cannot truly reflect the accurate temperature and temperature distribution in the reactor, and is an indirect measurement method, which restricts the effect of temperature monitoring

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