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Ferrous sulfide vapor phase passivation device

A ferrous sulfide, gas-phase passivation technology, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of long passivation time, high passivation cost, uneven passivation, etc. Long contact time, low cost, uniform passivation effect

Active Publication Date: 2016-03-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the problem of high passivation cost, uneven passivation, long passivation time and complicated operation in the prior art, and a new ferrous sulfide vapor phase passivation device is provided

Method used

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  • Ferrous sulfide vapor phase passivation device

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Embodiment 1

[0025] in such as figure 1 The gas-phase passivation of ferrous sulfide is carried out on the device shown, the vacuum pump is connected to the tower body with a φ6 steel pipe, and the ball valve connected to the pipe is used to control the vacuum degree. The heat preservation system consists of electric heating belt, heat preservation cotton and temperature controller. The temperature sensor of the temperature controller is placed on the tower wall. The outer layer of the tower wall is covered with a layer of thermal insulation cotton. The temperature range of electric heating belt is 0~250℃.

[0026]The passivation tower has a length of 1500mm, an inner diameter of 95mm, and a wall thickness of 20mm. There are four hand holes on the side wall with a diameter of 70mm. Four temperature sensors are installed directly opposite the hand holes to record temperature signals. The tower is equipped with a tray, and the generated ferrous sulfide is placed on the tray for passivation...

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Abstract

The invention relates to a ferrous sulfide gas-phase passivation device mainly used for solving problems of existing technology that passivation cost is relatively high; passivation is nonuniform, passivation time is relatively long, and operation is complex. According to the ferrous sulfide gas-phase passivation device, a inert gas container, a oxygen-enriched air container, and a steam generator are connected with the bottom of a passivation tower body respectively; a ferrous sulfide suspension liquid container is connected with the top of the passivation tower body; side walls of the passivation tower body are provided with hand holes and a temperature sensor installation interface; trays are arranged in the passivation tower body; passivation tower body outlet pipelines are divided into at least two parts, one part is connected with a sulfur dioxide and hydrogen sulfide content detecting device through a condenser and a drier, and the other part is connected with an alkaline liquor absorbing tank. The ferrous sulfide gas-phase passivation device is capable of solving the above problems preferably, and can be used for ferrous sulfide gas-phase passivation.

Description

technical field [0001] The invention relates to a ferrous sulfide vapor phase passivation device. Background technique [0002] Ferrous sulfide is the corrosion product of sulfur in petroleum and its derivatives to petrochemical equipment. During the maintenance of petrochemical equipment, spontaneous combustion or explosion accidents often occur due to the oxidation of ferrous sulfide. Therefore, ferrous sulfide must be passivated before maintenance of petrochemical equipment. or cleaning treatment. [0003] At present, the industrial methods for preventing spontaneous combustion of ferrous sulfide mainly include: isolation method, cleaning method and passivation method. The isolation method is very effective in online protection, but it is difficult to realize in the process of shutting down for maintenance. The treatment method for ferrous sulfide in petrochemical equipment basically adopts the method of liquid phase passivation, that is, the liquid phase passivation age...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/10
Inventor 王振刚
Owner CHINA PETROLEUM & CHEM CORP
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