CN202823784U - Anticorrosion device of online filming of pipeline of oil refining and chemical engineering device - Google Patents
Anticorrosion device of online filming of pipeline of oil refining and chemical engineering device Download PDFInfo
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- CN202823784U CN202823784U CN 201220450347 CN201220450347U CN202823784U CN 202823784 U CN202823784 U CN 202823784U CN 201220450347 CN201220450347 CN 201220450347 CN 201220450347 U CN201220450347 U CN 201220450347U CN 202823784 U CN202823784 U CN 202823784U
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- pipeline
- film forming
- oil refining
- heating
- anticorrosion
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Abstract
The utility model relates to an anticorrosion device of online filming of a pipeline of an oil refining and chemical engineering device. The anticorrosion device of the online filming of the pipeline of the oil refining and chemical engineering device is characterized by comprising an injection device, a heating sleeve pipe and a heating device. The injection device comprises a temporary connector, a stop valve, a check valve, a metering pump and a film forming matter storage tank. The heating sleeve pipe is provided with a heating medium inlet and a heating medium outlet, and can be wound on the outer surface of an oil hydrocarbon device or a pipeline in a heliciform mode. The heating device is used for heating the heating medium. Through the anticorrosion device of the online filming of the pipeline of the oil refining and chemical engineering device, a coke film is generated on the inner surface of the pipeline, the coke film layer is smooth and compact, and stable in chemical performance, and the anticorrosion device of the online filming of the pipeline of the oil refining and chemical engineering device can prevent corrosive materials in the oil hydrocarbon from contacting with the oil hydrocarbon device or the inner surface of the pipeline, and performs the function of anticorrosion, and is guaranteed to operate safely for a long period.
Description
Technical field
The utility model relates to the anti-corrosive apparatus of the online film forming of pipeline of a kind of oil refining and chemical plant installations, belongs to oil equipment and pipeline corrosion protection technical field.
Background technology
The anticorrosion technique of the pipeline of oil refining and chemical plant installations is one of present petroleum industry urgent problem, and main anti-corrosion method is to apply anticorrosive at equipment and petroleum pipeline inwall at present, forms erosion shield.
Moulding process with the oil refining of erosion shield and chemical plant installations pipeline is comparatively complicated, take petroleum pipeline as example, its moulding process is: the impurity cleaning → steel tube surface dust cleaning → steel pipe heating in medium frequency → hot-extrudable winding of epoxy powder electrostatic spraying → primer (coating) → hot-extrudable winding of outer layer polyethylene (coating) → water cooling moulding → finished product anticorrosive coat divided edge molding → production tube stacking → production tube transportations such as the interior steel sand of steel pipe incoming inspection → steel tube surface preheating → Shot Blasting → pipe, anticorrosion cost is higher.And this erosion shield can't be repaired in case appearance destroys, and must stop using to change pipeline, and this can increase cost significantly, and can affect normally carrying out of production.
Also there are many problems in the erosion shield that forms, for example steel tube head coating alice, coating surface present hemispherical or the bulge of semielliptical shape, form inhomogeneous pit, commissure coating attenuate or break and the corrosion-inhibiting coating bulge, these all have a strong impact on apparent mass and the anticorrosion ability of protective coating.Especially for hydrocarbon, its component is comparatively complicated, and various corrosive substances are combined, corrosivity is very strong, the high-temperature anticorrosion of oil processing unit is even more important, and applies at present the method that anti-corrosion material forms erosion shield, can not satisfy the anticorrosion demand of oil refining and chemical plant installations.
The utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide the anti-corrosive apparatus of the online film forming of pipeline of a kind of oil refining and chemical plant installations, adopt this device by being injected into membrane substance in the upstream that needs the corrosion-resistant pipeline, pipeline is carried out on-line heating, form anticorrosion rete within it on the wall, contacting of corrosive substance in isolation oil refining and the chemical plant installations and inner surface of pipeline played corrosion-resisting function to pipeline.
For achieving the above object, the utility model provides the anti-corrosive apparatus of the online film forming of pipeline of a kind of oil refining and chemical plant installations, it is characterized in that, the anti-corrosive apparatus of the online film forming of pipeline of this oil refining and chemical plant installations comprises injection device, heating muff and firing equipment;
Wherein, described injection device comprises interim joint, stop valve, check valve, measuring pump, film forming matter storage tank;
Described heating muff is provided with heat medium entrance and heat medium outlet, and can be wound in the shape of a spiral the outer surface of described petroleum hydrocarbon device or pipeline;
Described firing equipment is used for heat medium is heated.
In the anti-corrosive apparatus of the online film forming of pipeline of above-mentioned oil refining and chemical plant installations, preferably, described heat medium porch is provided with temperature control equipment.This temperature control equipment is controlled the temperature of the heat medium in the heating muff by the flow of control heat medium porch, it can adopt any existing equipment that can realize its function.
In the anti-corrosive apparatus of the online film forming of pipeline of above-mentioned oil refining and chemical plant installations, preferably, the cross section of described heating jacket is flat.Adopt this shape can be wound in better the outside of petroleum hydrocarbon device or pipeline.
In the anti-corrosive apparatus of above-mentioned online film forming, the injection device that adopts, heating muff and firing equipment can adopt existing conventional equipment, as long as can realize its function.The heat medium that adopts can be water vapour and/or inert gas etc.
In the anti-corrosive apparatus of above-mentioned online film forming, injection device is used for being controlled to injection rate and the injection rate of membrane substance, injection rate can decide according to the character of transportation of substances flow velocity and film forming matter in the pipeline, and flow velocity is little comparatively suitable, but is greater than the green coke speed of film forming matter.In this injection device, interim joint, stop valve, check valve, measuring pump are connected pipeline with the film forming matter storage tank and connect successively.When being injected into membrane substance, at first by interim joint injection device is connected with needs corrosion-resistant pipeline, control injection rate and injection rate by measuring pump.The interim joint of injection device is used for being connected with the row of conduits fluid valve, stop valve is used for preventing that for beginning and termination, the check valve of control implant operation adverse current, measuring pump are used for, the film forming matter storage tank is used for the storage film forming matter.
The anti-corrosive apparatus of the above-mentioned online film forming that the utility model provides can be used for the anti-corrosion method of the online film forming of pipeline of the oil refining that may further comprise the steps and chemical plant installations: be injected into membrane substance in needs corrosion-resistant pipeline upstream in pipeline, and needs corrosion-resistant pipeline heated, be heated to 200-500 ℃ and kept 1 hour-240 hours, making needs the corrosion-resistant inner surface of pipeline to generate burnt film.
Above-mentioned online anti-corrosion method is injected into membrane substance by the anti-corrosive apparatus that utilizes online film forming of the present utility model in the pipeline of oil refining and chemical plant installations, then in the position that needs film forming pipeline is heated, make its temperature reach the temperature of film forming matter reaction green coke, thereby section forms the level and smooth burnt rete of one deck within it, the contacting of material and inner surface of pipeline in the isolating pipelines, thus also the interior corrosive substance of isolating pipelines and inner surface of pipeline contacts the etch-proof effect of playing.
In above-mentioned online film forming anti-corrosion method, character according to the material in the pipeline can be selected different film forming matters, preferably, the film forming matter that adopts is diesel oil, reduced crude or its narrow fraction oil, and boiling point is one or more the combination in 205-500 ℃ the polycyclic aromatic hydrocarbon compounds etc.The density of film forming matter, boiling range or boiling point are greater than or are higher than density, boiling range or the boiling point of the material that pipeline carries.According to the different in kind of film forming matter, can select different heating-up temperatures, preferably, the temperature of heating should be lower than the boiling point of film forming matter or do.The thickness of burnt film may be controlled to 0.01-10mm; Be preferably 1.0-5.0mm.The density of burnt film may be controlled to 900-1500kg/m3.
Character according to film forming matter is different with material transporting velocity in the pipeline, the injection rate of film forming matter can be controlled at different degree, is advisable with less speed, but is greater than the speed of film forming matter green coke.The controlling of injecting quantity of film forming matter gets final product in the degree of the thickness of the burnt film that can guarantee to generate.Can configure pipe wall thickness measuring apparatus in duct bottom, the film forming matter the controlling of injecting quantity increases the degree of 0.01-10mm at required anti-corrosion pipeline bottom wall thickness, finish until burnt film generates.The chemical composition of burnt film is mainly C, two kinds of compositions of H, and stable chemical nature is with contained corrosive substance H in the transportation of substances in oil refining and the chemical pipeline
2Chemical reaction does not occur in S, aphthenic acids, chlorion compound etc., can play contacting of corrosive substance and inner surface of pipeline in the petroleum hydrocarbon of carrying in the isolating pipelines, plays the antisepsis to pipeline.
Generally speaking, the anti-corrosive apparatus of the online film forming that provides of the utility model is the preservative treatment for horizontal pipe.
The anti-corrosive apparatus of the online film forming of pipeline of the oil refining that the utility model provides and chemical plant installations has following advantage:
1, the burnt film that generates by the anti-corrosive apparatus that adopts above-mentioned online film forming is in the inner surface flow boundary layer of pipeline, burnt rete is smoothly fine and close, chemical characteristic is stable, can isolating pipelines internal corrosion material and the contacting of inner surface of pipeline, can play antisepsis to pipeline, but guarantee its long period safe operation;
2, adopt the anti-corrosive apparatus of this online film forming in the situation that do not stop work and carry out, not affect normal production;
The amount of the film forming matter that adds when 3, adopting the anti-corrosive apparatus of this online film forming to prepare burnt film is compared with the amount that pipeline is carried, and unusual pettiness does not affect the character of material in the pipeline;
4, when the burnt film that forms occur damaged, when the problem such as peeling off, needn't stop to produce and change, only need to utilize the position that goes wrong the anti-corrosive apparatus of this online film forming to repeat the film forming operation forms new burnt film and gets final product, both can process quickly and easily problem, not affect again normally carrying out of production.
Description of drawings
The following drawings only is intended to the utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein:
The use view of the anti-corrosion method of the online film forming that Fig. 1 provides for embodiment 1;
Fig. 2 is the inner-walls of duct figure that does not generate burnt film among the embodiment 1;
Fig. 3 generates burnt film inner-walls of duct figure afterwards among the embodiment 1.
Main drawing reference numeral explanation:
The specific embodiment
Understand for technical characterictic of the present utility model, purpose and beneficial effect being had more clearly, referring now to Figure of description the technical solution of the utility model is carried out following detailed description, but but can not be interpreted as restriction to practical range of the present utility model.
The present embodiment provides the anti-corrosive apparatus of the online film forming of pipeline of a kind of oil refining and chemical plant installations, it comprises: injection device, heating muff 4 and firing equipment (not shown), wherein, injection device comprises the interim joint 6 that connects successively, stop valve 7, check valve 8, measuring pump 9 and film forming matter storage tank 10, interim joint 6 is used for being connected with pipeline 1 original draining valve 5 (being positioned at the bottom of pipeline), to be used for being injected into membrane substance, measuring pump 9 is used for the injection rate of the film forming matter of metering injection, and film forming matter storage tank 10 is used for storing film forming matter; Heating muff 4 is provided with heat medium entrance 2 and heat medium outlet 3, be respectively applied to input by the heat medium after the firing equipment heating and finish pipeline 1 is heated heat medium afterwards, 2 places are provided with the temperature control equipment (not shown) at the heat medium entrance, and this temperature control equipment is controlled the temperature of heating muff 4 interior heat mediums by the flow of control heat medium entrance 2.
The anti-corrosive apparatus of the online film forming that the present embodiment provides can be used for the anti-corrosion method of online film forming of the pipeline of oil refining and chemical plant installations, its use state as shown in Figure 1, heating muff 4 is wound on the outer surface of pipeline 1 in the shape of a spiral, can strengthen like this contact area of itself and pipeline 1 inner surface, improve heat transfer effect.
The anti-corrosion method of above-mentioned online film forming may further comprise the steps:
Utilize injection device to be injected into membrane substance in the upstream of pipeline 1 by draining valve 6, film forming matter is the narrow fraction oil (boiling range is 350-400 ℃) of reduced crude, by firing equipment heat medium is heated to 300 ℃, then heat medium is introduced the heating muff 4 from heat medium entrance 2, carry out exchange heat with pipeline 1 outer surface, continued to carry out 24 hours, the outer surface of pipeline 1 is through (its temperature is near 300 ℃) after heating, and film forming matter reacts under this temperature and forms burnt film in its inner surface boundaries layer.
The situation difference of pipeline 1 inner surface before heating and behind the burnt film of generation as shown in Figures 2 and 3.Wherein, Fig. 2 is the front inner surface of pipeline of heating, and it is smoother.Fig. 3 inner surface of pipeline behind the coking film of making a living can find out significantly that from figure the inner surface of pipeline has formed a coke charge film, and the thickness of burnt film is 0-5mm, and density is 1050kg/m
3
In carrying out antiseptic process, can be in the situation that do not stop normally to produce carrying out, be to carry the starting substance in the pipeline on one side, be injected into membrane substance on one side, according to studies show that, corrosion mainly occurs in the latter half of pipeline, when being injected into membrane substance, film forming matter mainly covers the bottom (mainly being for horizontal pipe) of pipeline, does not need to cover the whole inwall of pipeline, as long as the part green coke film forming that covers just can play good antiseptic effect.
The burnt film that inner surface of pipeline generates has been isolated the hydrocarbon of conveying in the pipeline and contacting of inner surface of pipeline, thereby also isolated contacting of ducted corrosive substance and inner surface of pipeline, thereby can play antisepsis to pipeline, but guarantee the safe operation of pipeline long period.
Claims (3)
1. the anti-corrosive apparatus of the online film forming of pipeline of an oil refining and chemical plant installations is characterized in that, the anti-corrosive apparatus of the online film forming of pipeline of this oil refining and chemical plant installations comprises injection device, heating muff and firing equipment;
Wherein, described injection device comprises interim joint, stop valve, check valve, measuring pump, film forming matter storage tank;
Described heating muff is provided with heat medium entrance and heat medium outlet, and can be wound in the shape of a spiral the outer surface of described petroleum hydrocarbon device or pipeline;
Described firing equipment is used for heat medium is heated.
2. the anti-corrosive apparatus of the online film forming of pipeline of oil refining according to claim 1 and chemical plant installations is characterized in that, described heat medium porch is provided with temperature control equipment.
3. the anti-corrosive apparatus of the online film forming of pipeline of oil refining according to claim 1 and chemical plant installations is characterized in that, the cross section of described heating jacket is flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220450347 CN202823784U (en) | 2012-09-05 | 2012-09-05 | Anticorrosion device of online filming of pipeline of oil refining and chemical engineering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220450347 CN202823784U (en) | 2012-09-05 | 2012-09-05 | Anticorrosion device of online filming of pipeline of oil refining and chemical engineering device |
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| Publication Number | Publication Date |
|---|---|
| CN202823784U true CN202823784U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220450347 Expired - Fee Related CN202823784U (en) | 2012-09-05 | 2012-09-05 | Anticorrosion device of online filming of pipeline of oil refining and chemical engineering device |
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| CN (1) | CN202823784U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873003A (en) * | 2012-09-05 | 2013-01-16 | 中国石油天然气集团公司 | Corrosion control method and device for online film formation of pipeline of oil refining and chemical device |
-
2012
- 2012-09-05 CN CN 201220450347 patent/CN202823784U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873003A (en) * | 2012-09-05 | 2013-01-16 | 中国石油天然气集团公司 | Corrosion control method and device for online film formation of pipeline of oil refining and chemical device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20210905 |
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| CF01 | Termination of patent right due to non-payment of annual fee |