Real time monitoring system for hydrogenation reaction effluent cooling process

Abstract

The invention belongs to the detecting system technical field, relating to a real time monitoring system of a hydrogenation reaction exudate cooling process. The system comprises the following functional modules that: a data fetch module, a data preprocess module, a data manual input module, a model modeling module, a critical characteristics index computation module, a diagnostic module and a real time display module. A user can realize all the functions of fetching data, diagnosing data, and real time displaying data by the system without adding any extra operations. The system can diagnose the specific reaction exudate system in real time effectively. The unserviceable control parameters in the varying duty operation of a specific REAC system can be displayed real time by monitoring various parameters of a reaction exudate air cooler, thereby providing the reliable working condition and various unserviceable control parameters information for site work personnel, effectively avoiding the unscheduled stoppage of the REAC system and improving the security, the stability and the long-time operation of the REAC system substantially.

Description

technical field [0001] The invention belongs to the technical field of detection systems, in particular to a real-time monitoring system for the cooling process of hydrogenation reaction effluent. Background technique [0002] Hydrocracking is the core technology of the petrochemical process of cleaning inferior oil and lightening heavy oil. Its operating conditions are harsh and the process is complex. The process includes reaction, fractionation, heat transfer, mass transfer, deposition, flow, plugging and Erosion and other related processes. [0003] Since Chevron Corporation developed the hydrocracking technology in 1959, the failure of the reaction effluent air cooler (referred to as REAC) system has always been a problem restricting the safe, stable and long-term operation of the hydrocracking unit. Aiming at the frequent failure problems of REAC system, NACE T-8 committee, UOP company, and API Association have conducted a lot of investigations for more than 30 years,...

AI Technical Summary

Problems solved by technology

But there are some problems in the proposal of the above-mentioned technical scheme, because the existing Kp value, NH 4 The range of HS concentration and flow rate is obtained through the statistical analysis of corrosion phenomena, lack of correlation analysis of complex failure process, and the operability is not strong

Therefore, accidents of out-of-control hydrogenation units caused by corrosion of REAC systems at home and abroad still occur frequently

With China's accession to WTO, the processing volume of heavy and sour crude oil in the Middle East has gradually increased, and many hydrocracking units have carried out high-sulfur capacity expansion transformations one after another. The production plan of the enterprise, and frequent unplanned shutdowns have caused serious economic losses

[0004] In 2004, under the influence of API932-B, many petrochemical companies at home and abroad upgraded the REAC tube bundle material to Incoloy825 (its price is more than 10 times that of carbon steel material), in order to improve the wear resistance and corrosion resistance of the REAC system by upgrading the material. Although the corrosion resistance of the REAC system can be improved through material upgrades, which can play a certain role in improving the safe operation of the REAC system, if the failure control parameters in the production process are not properly controlled, blockage or flushing may still occur. The failure of the REAC system caused by solar eclipse, and reports on the failure of the REAC system of Incoloy825 at home and abroad are also common

Therefore, it is difficult to fundamentally solve the failure problem of the REAC system simply by upgrading materials

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