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Dehydration corrosion prevention device of overhead equipment

An anti-corrosion device and equipment technology, applied in the direction of preventing corrosion during distillation, can solve the problems of corrosion under scale, small and difficult injection of corrosion inhibitors and ammonia water, etc., and achieve the effects of preventing corrosion, eliminating corrosion and having a simple structure.

Inactive Publication Date: 2015-10-21
SHANDONG CHANGYI PETROCHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Embodiment Construction

[0015] The invention is in figure 2 The improvement made on the basis of the anticorrosion device of the existing constant top equipment shown, that is, on the basis of the prior art, the water injection device 15, the ammonia water injection device 16 and the water injection device 16 connected to the distillation pipe 4 are connected. Inject the corrosion inhibitor device 17 and remove it, and then connect the drying water removal system and the delivery pump on the distillation pipe 4 in series. The specific structure is as follows.

[0016] The dehydration anti-corrosion device of constant top equipment provided by the present invention is as figure 1 As shown, it includes an atmospheric column (atmospheric distillation column) 1, an air cooler 2 and a reflux tank 3. The reflux tank 3 includes a tank body, the top of which is provided with a liquid inlet 8 and an exhaust pipe 9 for exhaust, and the bottom of the tank is provided with a liquid outlet 10 . The inlet ...

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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 o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G7/10
Inventor 徐向英董瑜
Owner SHANDONG CHANGYI PETROCHEM
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