Gas phase deactivation method for petrochemical device

A gas-phase passivation, petrochemical device technology, applied in metal material coating process, fuel test, material inspection, etc., can solve the problems of high cost and large consumption
CN102154612BActive Publication Date: 2013-06-12CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2013-06-12

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Abstract

The invention discloses a gas phase deactivation method for a petrochemical device. The method comprises the following steps of: sequentially opening a tail gas valve, an exhaust valve, a monitoring air inlet valve and a monitoring air outlet valve, and then starting an online gas chromatograph to monitor the concentration of SO2, wherein the SO2 content of the tail gas is high when the gas phasedeactivation process starts, and the volume concentration of the SO2 is reduced to 0.001-0.09 percent after 7 to 19 hours; and finishing the tower reaction when the volume concentration of the SO2 isnot changed in 30 to 60 minutes, finishing the gas phase deactivation, and resetting the valves. Compared with the deactivation method in the prior art, the method has the advantages that: the treatment of waste gas is easy; the gas phase deactivated waste gas can reach discharge standards by simple treatment; the treatment time is short; the cost is low, and the implementation is simple; oxygen rich air is mainly used in the gas phase deactivation, is convenient to use and has low cost; and because of gas phase action, channeling and dead angles are not caused.
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Description

technical field

[0001] The invention relates to a technical method in the petroleum and petrochemical field, in particular to a gas-phase passivation method for a petrochemical device. Background technique

[0002] At present, the treatment methods for ferrous sulfide in petrochemical plants all adopt the method of liquid phase passivation, that is, the liquid phase passivation agent is circulated in the device to realize the full reaction with ferrous sulfide, so as to prevent the oxidation and spontaneous combustion of ferrous sulfide the goal of.

[0003] 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.

[0004] The metal surface is transformed in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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