Seaside cold box device with anti-corrosion performance

Abstract

The utility model discloses a seaside cold box device with anti-corrosion performance, and belongs to the technical field of cold box corrosion prevention. The second cold box comprises a second cold box body and a pipeline, the second cold box body is provided with a box wall, a pipeline hole is formed in the box wall, a flange connector is installed in the pipeline hole and comprises an inner flange and an outer flange, a blind threaded hole is formed in the outer flange, a threaded hole corresponding to the blind threaded hole is formed in the inner flange, and the inner flange and the outer flange are connected through a bolt. An epoxy resin backing ring gasket is arranged between the outer flange and the box wall; the pipeline is arranged in the cylinder channel of the flange connector in a matched mode, the pipe section, located outside the second cold box, of the pipeline is a 6Mo stainless steel pipe subjected to anodizing treatment, the 6Mo stainless steel pipe is welded to the pipe end of the 5083 aluminum alloy pipe, and the welding position is located in the second cold box.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of cold box anticorrosion technology, especially relates to a seaside cold box device with anticorrosive performance. BACKGROUND

[0002] The air separation device built on the seaside will be operated in the environment of high humidity, high salt and high chlorine in the sea for a long time, so the corrosion resistance of the equipment is required to be very high, and the local corrosion and fatigue behavior of 304 stainless steel, aluminum alloy and other alloys in the marine atmosphere and seawater have been reported frequently. The traditional stainless steel and aluminum alloy material is prone to pitting corrosion, crevice corrosion and stress corrosion cracking in such environment, which affects the long-term stable operation of the equipment. SUMMARY

[0003] The utility model discloses a seaside cold box device with anticorrosive performance.

[0004] The utility model discloses the following technical scheme is realized:

[0005] The utility model discloses a seaside cold box device with anticorrosive performance, including second cold box and pipeline, second cold box has the box wall, is opened the pipeline hole on the box wall, is installed in the pipeline hole flange connector, flange connector includes inner flange and outer flange, is opened the blind thread hole on the outer flane, is opened the thread hole of corresponding blind thread hole on the inner flange, passes through bolt connection between the inner flange and the outer flange, is equipped with epoxy resin gasket ring pad between the outer flange and the box wall;

[0006] Pipeline is fitted in the barrel way of flange connector, and the pipe section on the pipeline outside second cold box is 6Mo stainless steel pipe treated by anodization, and the pipe end of 6Mo stainless steel pipe and 5083 aluminum alloy pipe is welded, and the welding position is located in second cold box.

[0007] Further, the outer flange has a stepped sleeve, the inner flange has a stepped cylinder, the outer stepped surfaces of the stepped sleeve and the stepped cylinder each have a concave ring, an epoxy resin gasket ring is arranged between the outer stepped surfaces of the stepped sleeve and the stepped cylinder, and the epoxy resin gasket ring is fitted on the concave ring.

[0008] Further, the outer port of the outer flange is a stepped port, a polytetrafluoroethylene sleeve is fitted in the stepped port, and the polytetrafluoroethylene sleeve is sleeved on the pipeline.

[0009] Further, a retaining ring is arranged on the pipeline, and the retaining ring is attached to the polytetrafluoroethylene sleeve.

[0010] Further, a retaining ring is arranged on the pipeline, and the retaining ring is attached to the polytetrafluoroethylene sleeve.

[0011] Further, the second cold box has a main heat exchanger.

[0012] Further, an instrument pipe is provided, which penetrates the box wall through a sleeve.

[0013] Further, a first cold box is provided, which has a main cooler inside.

[0014] The utility model has the advantages of:

[0015] The inner wall of the box wall is made of stainless steel, and the outer wall of the box wall is made of stainless steel, which improves the corrosion resistance of the equipment and ensures its stable operation for a long time.

[0016] Of course, implementing any product of the utility model does not necessarily need to achieve all the advantages mentioned above. BRIEF DESCRIPTION OF DRAWINGS

[0017] To more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0018] Figure 1 A distribution diagram of cold boxes in the air cooling device is shown in the figure.

[0019] Figure 2 A structure diagram of the flange connector is shown in the figure.

[0020] Figure 3 A structure diagram of the flange connector and the box wall is shown in the figure.

[0021] Figure 4 A structure diagram of the flange connector, the box wall and the pipe is shown in the figure.

[0022] In the drawings, the components represented by the numbers are listed as follows:

[0023] 1, first cold box; 2, main cooler; 3, pipe; 4, second cold box; 5, flange connector; 6, instrument pipe; 7, main heat exchanger; 401, hole; 402, heat insulation layer; 403, box wall; 501, outer flange; 502, blind threaded hole; 503, epoxy resin gasket ring; 504, inner flange; 505, threaded hole; 506, concave ring; 507, stepped port. DETAILED DESCRIPTION

[0024] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0025] In the description of the present application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation of the present application.

[0026] Please refer to Figures 1-4 The utility model discloses a seaside cold box device with anticorrosive performance.

[0027] The second cold box 4 has a wall 403, the wall 403 is hollow, the cavity of the wall 403 is filled with pearlite 402, the inner wall of the wall 403 is made of 304 stainless steel material, the outer wall of the wall 403 is made of 316 stainless steel material, the corrosion resistance of the equipment is improved, and the long-term stable operation is ensured, in addition, the wall 403 can also be made of painted carbon steel.

[0028] The wall 403 is provided with a pipeline hole, a flange connector 5 is arranged in the pipeline hole, the flange connector 5 comprises an inner flange 504 and an outer flange 501, the outer flange 501 is provided with a blind threaded hole 502, the inner flange 504 is provided with a threaded hole 505 corresponding to the blind threaded hole 502, the inner flange 504 and the outer flange 501 are connected through bolts, and the outer flange 501 and the wall 403 are provided with an epoxy resin gasket ring 503, wherein the wall 403 is provided with a hole corresponding to the bolt.

[0029] Further, the outer flange 501 has a stepped sleeve, the stepped sleeve is an inner stepped sleeve, the inner flange 504 has a stepped cylinder, the stepped cylinder is an outer stepped cylinder, the outer stepped surfaces of the stepped sleeve and the stepped cylinder are provided with concave rings 506, and the outer stepped surfaces of the stepped sleeve and the stepped cylinder are provided with the epoxy resin gasket ring 503.

[0030] Further, the outer end of the outer flange 501 is a stepped port 507, a polytetrafluoroethylene sleeve is matched in the stepped port 507, and the polytetrafluoroethylene sleeve is sleeved on the pipeline 3.

[0031] The pipe 3 is matched in the cylinder hole of the flange connector 5, the pipe 3 is 5083 aluminum alloy pipe, the pipe section of the pipe 3 located outside the second cold box 4 is 6Mo stainless steel pipe after anodizing treatment, the pipe end of the 6Mo stainless steel pipe and the 5083 aluminum alloy pipe is welded, and the welding position is located in the second cold box 4.

[0032] The surface of the flange connector 5 is arc sprayed with aluminum magnesium alloy, the spraying thickness is 150-200 μm, and the sealing agent is epoxy resin.

[0033] Further, the pipe 3 is provided with a blocking ring 301, and the blocking ring 301 is attached to the polytetrafluoroethylene sleeve.

[0034] Further, the second cold box 4 has a main heat exchanger 7, and the shell of the main heat exchanger 7 is communicated with the pipe 3.

[0035] Further, the instrument pipe 6 penetrates the box wall 403 through a clamping sleeve, the instrument pipe 6 in the second cold box 4 is made of 304 stainless steel, and the instrument pipe 6 outside the second cold box 4 is made of 6Mo stainless steel.

[0036] The first cold box 1 has a main cooler, the air cooled by the first cold box 1 is guided into the second cold box 4 through a pipe, and then is discharged from the second cold box 4 after heat exchange.

[0037] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details, nor limit the present application to the specific embodiments described. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that the persons skilled in the art can well understand and utilize the present application. The present application is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A seaside cold box device having a corrosion prevention performance, comprising a second cold box (4), characterized in that: The second cold box (4) has a box wall (403) with a pipe hole, a flange connector (5) is installed in the pipe hole, the flange connector (5) comprises an inner flange (504) and an outer flange (501), the outer flange (501) has a blind threaded hole (502), the inner flange (504) has a threaded hole (505) corresponding to the blind threaded hole (502), the inner flange (504) and the outer flange (501) are connected by bolts, and an epoxy resin gasket ring (503) is arranged between the outer flange (501) and the box wall (403). The pipeline (3) is matched in the barrel of the flange connector (5), the pipeline (3) is a 5083 aluminum alloy pipe, a pipe section of the pipeline (3) located outside the second cold box (4) is a 6Mo stainless steel pipe subjected to anodization treatment, the pipe ends of the 6Mo stainless steel pipe and the 5083 aluminum alloy pipe are welded, and the welding position is located in the second cold box (4).

2. A seaside cold box device with anti-corrosion performance according to claim 1, characterized in that, The outer flange (501) has a stepped sleeve, the inner flange (504) has a stepped barrel, the outer stepped surfaces of the stepped sleeve and the stepped barrel have concave rings (506), and the epoxy resin gasket ring (503) is arranged between the outer stepped surfaces of the stepped sleeve and the stepped barrel and is matched in the concave rings (506).

3. A seaside cold box device with anti-corrosion performance according to claim 2, characterized in that, The outer end of the outer flange (501) is a stepped port (507), a polytetrafluoroethylene sleeve is matched in the stepped port (507) and is sleeved on the pipeline (3).

4. A seaside cold box device with anti-corrosion performance according to claim 3, characterized in that, The pipeline (3) is provided with a stop ring (301), and the stop ring (301) is attached to the polytetrafluoroethylene sleeve.

5. A sea-side cold box apparatus having a corrosion prevention function according to any one of claims 1 to 3, characterized in that, The pipeline (3) is provided with a stop ring, the box wall (403) is hollow, the cavity of the box wall (403) is filled with a pearlite filler (402), and the box wall (403) has a hole corresponding to the bolt.

6. A seaside cold box device with anti-corrosion performance according to claim 5, characterized in that, The second cold box (4) has a main heat exchanger (7).

7. A seaside cold box device with anti-corrosion performance according to claim 6, characterized in that, The instrument pipeline (6) penetrates the box wall (403) through a clamping sleeve.

8. A seaside cold box device with anti-corrosion performance according to claim 5, characterized in that, The first cold box (1) has a main cooler.

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