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A curing agent for acetylene concentration device and its cleaning and passivation method

A technology of thickening device and acetylene, which is applied in the coating process of metal materials, etc., can solve the problems of pipeline equipment blockage, equipment operation cycle shortening, etc., and achieve the effect of prolonging operation efficiency

Active Publication Date: 2018-05-11
SINOPEC SICHUAN VINYLON FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acetylene and higher alkynes, as unsaturated hydrocarbons with high reactivity, are easy to polymerize to produce polymers such as macromolecular aromatic hydrocarbons and chain hydrocarbons. These polymers accumulate in equipment and pipelines, which can easily lead to blockage of pipeline equipment and shorten the operation cycle of equipment. shorten

Method used

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  • A curing agent for acetylene concentration device and its cleaning and passivation method
  • A curing agent for acetylene concentration device and its cleaning and passivation method
  • A curing agent for acetylene concentration device and its cleaning and passivation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A maintenance method for an acetylene concentration device, using the following reagents and methods:

[0032] Cleaning agent: 80% (w / w) naphtha, 10% (w / w) ethoxylated alcohol, 5% (w / w) isopropanol, 1% limonene (w / w), Branched C 12 The content of alkylbenzenesulfonic acid was 1% (w / w).

[0033] Neutralize preservatives: 60% ethanolamine (w / w), 10% methoxypropanol content (w / w), the balance is water;

[0034] Inhibitor: diethanolamine 8000ppm;

[0035] Passivator: 5-10% (w / w) 2-diethylaminoethanol, the balance being water;

[0036] 12m 3 After the acetylene concentration device is out of service, the equipment is isolated and treated, and then 6m deoxygenated water is added to the equipment 3 , add steam to the tower to control the water temperature at 70°C, start the circulating pump to make the tower in the cleaning state, feed 360kg of cleaning agent into the equipment through the dosing pump, stop the circulation after 21.5 hours, and take the packing and cleani...

Embodiment 2

[0040] A method for cleaning and passivating an acetylene concentration device, using the following reagents and methods:

[0041] Cleaning agent: 75% (w / w) naphtha, 15% (w / w) ethoxylated alcohol, 8% (w / w) isopropanol, 1% limonene (w / w), Branched C 12 The content of alkylbenzenesulfonic acid was 1% (w / w).

[0042] Neutralize preservatives: 60% ethanolamine (w / w), 10% methoxypropanol content (w / w), the balance is water;

[0043] Inhibitor: 2-ethylaminoethanol, concentration 8000ppm;

[0044] Passivator: 5-10% (w / w) 2-diethylaminoethanol, the balance being water;

[0045] 12m 3 After the acetylene concentration device is out of service, the equipment is isolated and treated, and then 6m deoxygenated water is added to the equipment 3 , add steam to the tower to control the water temperature at 75°C, start the circulating pump to make the tower in the cleaning state, feed 360kg of cleaning agent into the equipment through the dosing pump, stop the circulation after 24 hours, ...

Embodiment 3

[0049] A method for cleaning and passivating an acetylene concentration device, using the following reagents and methods:

[0050] Cleaning agent: 78% (w / w) naphtha, 15% (w / w) ethoxylated alcohol, 5% (w / w) isopropanol, 1% limonene (w / w), Branched C 12 The content of alkylbenzenesulfonic acid was 1% (w / w).

[0051] Neutralize preservatives: 60% ethanolamine (w / w), 10% methoxypropanol content (w / w), the balance is water;

[0052] Inhibitor: diethanolamine, concentration 12000ppm;

[0053] Passivator: 5-10% (w / w) 2-diethylaminoethanol, the balance being water;

[0054] 12m 3 After the acetylene concentration device is out of service, the equipment is isolated and treated, and then 6m deoxygenated water is added to the equipment 3 , add steam to the tower to control the water temperature at 70°C, start the circulating pump to keep the tower in the cleaning state, feed 360kg of cleaning agent into the equipment through the dosing pump, stop the circulation after 24 hours, and ...

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Abstract

The invention provides a curing agent and a curing method for an acetylene concentration device. The curing agent comprises cleaning agents composed of naphtha, ethoxylated alcohol, isopropyl alcohol, limonene and branch C12 alkyl benzene sulfonic acid, wherein the content of the naphtha is 60-80% (w / w), the content of the ethoxylated alcohol is 10-30% (w / w), the content of the isopropyl alcohol is 5-10% (w / w), the content of the limonene is 1-5% (w / w) and the content of the branch C12 alkyl benzene sulfonic acid is 1-5% (w / w). The curing agent and the curing method are efficient, polymers in the acetylene concentration device are fully cleared, the inner surface of the device and the inner surface of pipelines are effectively passivated, generation of acetylene polymers is reduced in the subsequent operation process of the concentration device, the device is effectively cured, the operation efficiency of the device is improved, and the running time and the service life of the device are prolonged.

Description

technical field [0001] The invention relates to a maintenance method for a concentrating device in the partial oxidation of natural gas to acetylene process. Background technique [0002] Acetylene is a very important basic chemical raw material, which is used to produce organic chemicals such as vinyl acetate and 1.4-butanediol. At present, the methods for producing acetylene mainly include calcium carbide method and natural gas partial oxidation method. Compared with calcium carbide method, natural gas partial oxidation method has the advantages of low energy consumption and low pollution, and is widely used in Western European countries. Partial oxidation of natural gas to produce acetylene is to mix and react a certain proportion of natural gas and oxygen preheated to a certain temperature in an acetylene reactor. After a few milliseconds of reaction, the cracked gas is quenched to within 100°C with water, oil and other media. After dedusting, cooling, and compression, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G5/06C23C22/62
Inventor 安杰陈天文陈林王萍萍郭玉乾
Owner SINOPEC SICHUAN VINYLON FACTORY
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