Dehydration anti-corrosion device for constant top equipment

Abstract

The invention discloses a dehydration corrosion prevention device of overhead equipment. The dehydration corrosion prevention device comprises an atmospheric column, an air cooler and a return tank. An inlet of the air cooler is communicated with the top of the atmospheric column through a distillate outlet pipe. An outlet of the air cooler is communicated with the return tank through a fluid conveying pipe. A drying dehydrator is connected to the distillate outlet pipe in series. A delivery pump located between the drying dehydrator and the air cooler is further connected to the distillate outlet pipe in series. The atmospheric column is simple in structure, capable of preventing HCl and H2S from accumulating on the pipes, the air cooler, a condenser and the wall of the return tank and good in corrosion prevention effect.

Description

technical field [0001] The invention belongs to the technical field of petroleum refining, and in particular relates to a dehydration anticorrosion device for constant top equipment. Background technique [0002] Existing anti-corrosion devices for standing roof equipment such as figure 2 As shown, it includes atmospheric tower 1, air cooler 2 and reflux tank 3, the inlet of air cooler 2 communicates with the top of atmospheric tower 1 through distillation pipe 4, and the outlet of air cooler 2 connects with reflux tank 3 through delivery pipe 5 Connected, a condenser 14 is connected in series on the flow pipe 5; an exhaust pipe 9 for exhaust is provided on the return tank 3, and a liquid outlet 10 is provided at the bottom of the tank body, and the inlet of the liquid outlet 10 and the return pump 11 The liquid port is connected, and the liquid outlet of the reflux pump 11 is connected with the production pipe 12 on the one hand, and communicated with the upper part of the...

AI Technical Summary

Problems solved by technology

[0003] However, with the increase in the processing of sulfur-containing crude oil, demulsifiers are relied on to improve the desalination effect in electrical desalination. The instability of crude oil types in many devices affects the use of demulsifiers. The injection volume of corrosion inhibitors and ammonia water is small, and the accuracy of transportation makes the The effect of corrosion inhibitor and ammonia water is greatly reduced, and it is difficult to control the pH value at 6.5-7.5. In addition, the ammonium chloride produced by the reaction of ammonia water and hydrogen chloride is not easy to dissolve in water, and it is deposited on the surface of the tube bundle, which will also cause corrosion under the scale

In other words, one detachment and three injections cannot contain the corrosion of atmospheric tower top equipment

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