Hydrogenation air cooling pipe bundle system for preventing ammonium salt flowing corrosion large leakage pipe blasting risk

Abstract

The invention discloses a hydrogenation air cooling pipe bundle system for preventing ammonium salt flowing corrosion large leakage pipe blasting risk. An inlet pipe box and an outlet pipe box are arranged in parallel; upper and lower two rows of pipe bundles provided with center through holes are horizontally arranged in the inlet pipe box in parallel; two ends of each pipe bundle penetrate through the inlet pipe box, and the pipe bundles are in interference fit with through holes of box plates on two sides of the inlet pipe box; horizontal radial through holes are formed in the side walls of the pipe bundles in the inlet pipe box; the pipe bundles are tightly connected with the inlet pipe box through sealing pressing modules; the pipe bundles are connected with thick wall pipes; the thick wall pipes are connected with through holes of the box plates of the outlet pipe box by pressure sensing modules; and plug modules are mounted in the through holes of the box plates of the outlet pipe box. The system can realize quick positioning of pipe bundle bit positions with ammonium salt flowing corrosion micro leakage in non-inspection period, realizes leakage blockage under the precondition of not stopping working to effectively prevent conversion of the ammonium salt flowing corrosion from micro leakage to large leakage or even pipe blasting, and prominently reduces non-planned stop risk.

Description

technical field [0001] The invention relates to the prevention and control of safety accidents such as leaks and pipe bursts caused by flow corrosion in oil refineries in the petrochemical industry, and specifically relates to a hydrogenation air-cooled tube bundle system that prevents the risk of ammonium salt flow corrosion and large leakage pipe bursts. Background technique [0002] Large-scale high-pressure hydrogenation air coolers are widely used in the petrochemical industry. They usually have the characteristics of complex processes, variable working conditions, long-term and even overloaded operation. The transported medium is flammable, explosive, toxic and harmful, and its reliability is directly related to public safety. Anatomy of a large number of failure cases found that during the multi-component fluid delivery process, due to the coupling effect of flow and heat transfer, flow corrosion caused by ammonium salt crystallization deposition and multiphase flow er...

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Problems solved by technology

[0005] In order to overcome the unplanned shutdown of the air cooler of the hydrogenation unit caused by frequent ammonium salt flow corrosion, the present invention provides a hydrogenation air-cooled tube bundle system that prevents the risk of ammonium salt flow corrosion and large leakage tube explosion. The invention can quickly and effectively determine Flow corrosion leakage tube bundle location number, and through the online plugging technology significantly reduce the frequent shutdown of hydrogenation air cooler caused by ammonium salt flow corrosion small leakage, reduce the level of unplanned shutdown of hydrogenation units, and improve the efficiency of hydrogenation air cooling tube bundles in poor crude oil long-term safe operation adaptability in the process of

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