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Ferrous sulfide gas phase passivation device

A gas-phase passivation and ferrous sulfide technology, which is applied in coating, metal material coating process, solid-state diffusion coating, etc., can solve the problems of high cost and large consumption

Inactive Publication Date: 2011-06-22
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a ferrous sulfide vapor phase passivation device, which can effectively overcome the following defects in the liquid phase passivation in the prior art: (1) large dosage and high cost

Method used

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  • Ferrous sulfide gas phase passivation device
  • Ferrous sulfide gas phase passivation device
  • Ferrous sulfide gas phase passivation device

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Embodiment Construction

[0082] Gas phase passivation is a method of controlled oxidation of ferrous sulfide using water vapor as a carrier and using oxidizing gas to prevent people who open the device from spontaneous combustion and explosion accidents of ferrous sulfide inside the petrochemical plant before maintenance.

[0083] The gas-phase passivation method of ferrous sulfide in the petrochemical device of the present invention is carried out in the middle and later stages of the distillation tower, and the low-pressure steam (0.3-0.4Mpa) carries oxygen-enriched air with a certain oxygen content (21%-35%) into the distillation tower for implementation. The gas phase passivation of ferrous sulfide, the heat released by the passivation is absorbed by the steam with a large heat capacity and will not cause the accumulation of heat in the tower. Part of the sulfur dioxide gas generated by the passivation is carried out of the tower by the steam and then passed through the ammonia It can be directly d...

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Abstract

The invention discloses a ferrous sulfide gas phase passivation device. The gas phase passivation device contains a steam supply part, an oxygen supply part and a sealing part. The gas phase passivation device is connected with a tail gas treatment device and a data analysis device respectively to perform gas phase passivation to a petrochemical device. The steam supply part contains a water softener, a steam generator, a steam flowmeter and an oxygen valve. The oxygen supply part contains a compressed oxygenized air bottle, a gas flowmeter, an oxygen inlet valve and an oxygen valve. The sealing part contains a packed tower, a tail gas valve and a gathering tank valve. Compared with the liquid phase passivation method in the prior art, the phase passivation method of the invention mainly uses oxygenized air, is convenient to use and has lower cost. Waste gas is easy to treat. The waste gas which is easily treated through gas phase passivation can meet the emission standard. The treatment time is short; and passivation can be performed evenly and the channeling phenomenon does not exist.

Description

technical field [0001] The invention relates to the technical field of a processing device for metal products, in particular to a ferrous sulfide gas-phase passivation device for metal surfaces. Background technique [0002] The passivation of the metal can protect the metal from corrosion. The passivation phenomenon is caused by the metal phase and the solution phase, or is caused by the interface phenomenon. The effect of mechanical scraping on metals in a passivated state has been studied. Experiments show that if the metal surface is continuously scratched during measurement, the potential of the metal moves sharply to the negative direction, that is, trimming the metal surface can cause the activation of the passive metal. That is, it is proved that the passivation phenomenon is an interface phenomenon. It changes at the interface between the metal and the medium in contact with each other under certain conditions. Electrochemical passivation is the formation of meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/14
Inventor 王慧欣谢传欣霍明甲姜杰
Owner CHINA PETROLEUM & CHEM CORP
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