Anti-corrosion system and method for cold exchange equipment of alkylation purification fractionation system

Abstract

The invention provides an anti-corrosion system and method for cold exchange equipment of an alkylation purification fractionation system. The system mainly comprises a medicine storage unit which comprises three medicine storage barrels and a stirring mechanism, wherein the three medicine storage barrels are respectively used for storing different medicines, and each medicine storage barrel is provided with a medicine liquid feeding pipe and a water inlet pipe; a water storage unit which comprises a water storage tank and a stirring mechanism arranged in the water storage tank; and a conveying unit which comprises discharging pipes, connecting pipes, medicine feeding pipes, blow-off pipes and a blow-off groove, wherein the discharging pipes and the blow-off pipes are arranged below the medicine storage barrels and communicated with the medicine storage barrels, the blow-off pipes on the three medicine storage barrels are communicated and extend to the blow-off groove, the connecting pipe is arranged between the discharging pipes on any two medicine storage barrels, and the three medicine feeding pipes are arranged below the connecting pipe in a communicating manner. The water quality of the water for the air cooler can be improved, and the service life of the air cooler is prolonged.

Description

technical field [0001] The invention relates to the technical field of alkylation, in particular to an anti-corrosion system and method for a cold exchange equipment of an alkylation purification and fractionation system. Background technique [0002] The fractionation system of the alkylation unit mainly uses the principle of rectification to separate the reaction products to obtain C5, C3, isooctane, isobutane and n-butane products. The top cooling of the fractionation system adopts wet air cooling. Metal ions, sludge, salt, and microorganisms will cause extensive corrosion of the tube bundle, which seriously affects the long-term stable operation of the device. [0003] At present, the total number of tube bundles of a single air cooler is about 1313. During use, it was found that tube bundle leakage began to occur after 26 months of use. In addition, tube bundle leakage generally occurred in multiple air coolers, and the corrosion failure was common. event. [0004] Th...

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Problems solved by technology

The corrosion mechanism is the electrochemical corrosion under the scale caused by the oxygen concentration difference. Due to the scaling, the corrosion environment under the scale deteriorates, and the galvanized layer does not reach the designed service life and is corroded prematurely, and then the heat exchange tube substrate is corroded, eventually causing the air cooling effect reduction or even failure

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