Oxidation-resistant and high-temperature-resistant seamless steel tube for petroleum cracking

Abstract

The utility model relates to the technical field of pipe manufacturing, and discloses an anti-oxidation high-temperature-resistant seamless steel pipe for petroleum cracking, which comprises an outer pipe, a connecting rod is fixedly connected to the left side of the outer pipe, external threads are arranged on the outer wall of the connecting rod, a water inlet is arranged at the left end of the outer wall of the outer pipe, and a water outlet is arranged at the right end of the water inlet. A water inlet pipe is fixedly connected to the interior of the water inlet, a water drainage pipe is fixedly connected to the interior of the water drainage port, an anti-oxidation layer is arranged on the outer wall of the water drainage pipe, a plurality of reinforcing ribs are fixedly connected to the inner wall of the anti-oxidation layer, and a first anti-corrosion layer is arranged on the bottom sides of the reinforcing ribs. According to the utility model, the use performance of the seamless steel pipe is optimized, the pipeline is prevented from being eroded by chemical substances in the operation process, the steel pipe is prevented from being oxidized and corroded in a high-temperature environment, and the service life is prolonged; and the mechanical property and the chemical stability of the seamless steel pipe are prevented from being influenced by over-high temperature in the use process.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe manufacturing, in particular to a seamless steel pipe for antioxidant and high-temperature resistant petroleum cracking. Background Art

[0002] Petroleum cracking is a process in which hydrocarbons with relatively large molecular weights and higher boiling points are broken into hydrocarbons with relatively small molecular weights and lower boiling points under certain conditions. The cracking reaction that occurs solely by the action of heat is called thermal cracking. Generally, petroleum is transported through seamless steel pipes. As a key conveying pipeline equipment in the petroleum industry, the background technology of seamless steel pipes for petroleum cracking covers multiple aspects to ensure long-term stable operation and safety in high-temperature, high-pressure, and corrosive environments. Special alloy steels with high strength and corrosion resistance are selected, usually containing elements such as chromium, nickel, and molybdenum. These alloys can maintain stable mechanical properties and chemical stability in high-temperature and corrosive media. The steel pipe material must be able to withstand temperatures above 800 degrees Celsius during the petroleum cracking process. Due to the possible acidic or alkaline environment generated during the cracking process, the steel pipe needs to have good corrosion resistance and is not easily corroded and worn.

[0003] The existing seamless steel pipes for petroleum cracking cannot cool the inside of the steel pipe, which easily leads to damage to the steel pipe structure, and the steel pipe material works in a high-strength environment for a long time. If antioxidant and high-temperature resistant materials are not used, it is easy to affect petroleum cracking. In response to this technical problem, this application proposes a seamless steel pipe for antioxidant and high-temperature resistant petroleum cracking. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose a seamless steel pipe for antioxidant and high-temperature resistant petroleum cracking.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A seamless steel pipe for antioxidant and high-temperature resistant petroleum cracking, including an outer pipe. A connecting rod is fixedly connected to the left side of the outer pipe. The outer wall of the connecting rod is provided with an external thread. An inlet is opened at the left end of the outer wall of the outer pipe. A drain outlet is opened at the right end of the inlet. A water inlet pipe is fixedly connected inside the inlet. A drain pipe is fixedly connected inside the drain outlet. An antioxidant layer is provided on the outer wall of the drain pipe. A plurality of reinforcing ribs are fixedly connected to the inner wall of the antioxidant layer. A first anti-corrosion layer is provided on the bottom side of the reinforcing ribs. A second anti-corrosion layer is provided inside the first anti-corrosion layer. A protective layer is provided inside the second anti-corrosion layer. A high-temperature resistant layer is provided inside the protective layer. A heat conduction layer is provided inside the high-temperature resistant layer. The left side of the heat conduction layer is connected to the right side of the connecting rod.

[0007] Further, a limiting groove is formed at the right end inside the outer pipe, internal threads are provided inside the limiting groove, and the outer wall of the connecting rod is threadedly connected to the inner wall of the limiting groove.

[0008] Further, an inner pipe is fixedly connected inside the outer pipe, and drainage grooves are formed on the outer wall of the inner pipe.

[0009] Further, the antioxidant layer is prepared from silicon dioxide as the raw material.

[0010] Further, the first anti-corrosion layer is prepared from polyvinyl chloride as the raw material, and the second anti-corrosion layer is prepared from acrylic resin as the raw material.

[0011] Further, the protective layer is prepared from epoxy resin as the raw material.

[0012] Further, the high-temperature resistant layer is prepared from chromium-nickel alloy as the raw material, and the heat-conducting layer is prepared from graphite as the raw material.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, through the mutual cooperation of the antioxidant layer, the first anti-corrosion layer, the second anti-corrosion layer and the high-temperature resistant layer, the service performance of the seamless steel pipe is optimized, the pipeline is prevented from being eroded by chemical substances during operation, the steel pipe is prevented from being oxidized and corroded in a high-temperature environment, and the service life is prolonged.

[0015] 2. In the utility model, through the mutual cooperation of the water inlet pipe, the drain pipe and the drainage grooves, water cooling is carried out inside the seamless steel pipe, and the influence of too high temperature on the mechanical properties and chemical stability of the seamless steel pipe during use is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of a seamless steel pipe for petroleum cracking with antioxidant and high-temperature resistance proposed by the utility model;

[0017] Figure 2 is a sectional view of the inside of the steel pipe of a seamless steel pipe for petroleum cracking with antioxidant and high-temperature resistance proposed by the utility model;

[0018] Figure 3 is a schematic diagram of the water cooling structure of a seamless steel pipe for petroleum cracking with antioxidant and high-temperature resistance proposed by the utility model;

[0019] Figure 4 is a schematic diagram of a partial structure of a seamless steel pipe for petroleum cracking with antioxidant and high-temperature resistance proposed by the utility model;

[0020] Figure 5Schematic diagram of the inner pipe structure of a seamless steel pipe for anti-oxidation and high-temperature resistance in petroleum cracking proposed by the present utility model.

[0021] Legend description:

[0022] 1. Outer pipe; 2. Connecting rod; 3. External thread; 4. Water inlet pipe; 5. Drain pipe; 6. Anti-oxidation layer; 7. Reinforcing rib; 8. First anti-corrosion layer; 9. Second anti-corrosion layer; 10. Protective layer; 11. High-temperature resistant layer; 12. Heat conduction layer; 13. Water inlet; 14. Drain outlet; 15. Limit groove; 16. Internal thread; 17. Inner pipe; 18. Drainage groove. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0024] Refer to Figure 1 and Figure 2 , an embodiment provided by the present utility model: A seamless steel pipe for anti-oxidation and high-temperature resistance in petroleum cracking, including an outer pipe 1, a connecting rod 2 is fixedly connected to the left side of the outer pipe 1, an external thread 3 is arranged on the outer wall of the connecting rod 2, a water inlet 13 is opened at the left end of the outer wall of the outer pipe 1, a drain outlet 14 is opened at the right end of the water inlet 13, a water inlet pipe 4 is fixedly connected inside the water inlet 13, a drain pipe 5 is fixedly connected inside the drain outlet 14, an anti-oxidation layer 6 is arranged on the outer wall of the drain pipe 5, a plurality of reinforcing ribs 7 are fixedly connected to the inner wall of the anti-oxidation layer 6, a first anti-corrosion layer 8 is arranged on the bottom side of the reinforcing ribs 7, a second anti-corrosion layer 9 is arranged inside the first anti-corrosion layer 8, a protective layer 10 is arranged inside the second anti-corrosion layer 9, a high-temperature resistant layer 11 is arranged inside the protective layer 10, a heat conduction layer 12 is arranged inside the high-temperature resistant layer 11, the left side of the heat conduction layer 12 is connected to the right side of the connecting rod 2. During the petroleum cracking process, water is injected into it through the water inlet pipe 4 arranged on the outer wall of the seamless steel pipe, the water moves along the drainage groove 18 arranged on the outer wall of the inner pipe 17, and then flows out through the drain pipe 5, realizing continuous water cooling of the inner pipe 17 to avoid damage to the material caused by too high temperature inside the seamless pipe.

[0025] Refer to Figures 3 - 5, a limiting groove 15 is provided at the right end inside the outer tube 1, an internal thread 16 is provided inside the limiting groove 15, and the outer wall of the connecting rod 2 is threadedly connected to the inner wall of the limiting groove 15 to enhance the structural stability. An inner tube 17 is fixedly connected inside the outer tube 1, and a drainage groove 18 is provided on the outer wall of the inner tube 17 to achieve the effect of circulating water cooling. The antioxidant layer 6 is prepared from silicon dioxide. Silicon dioxide can form a stable oxide layer at high temperatures, providing good insulation and chemical corrosion resistance. The first anti-corrosion layer 8 is prepared from polyvinyl chloride, and the second anti-corrosion layer 9 is prepared from acrylic resin. Polyvinyl chloride can be used to cover the metal surface, providing mechanical and chemical protection. Acrylic resin can form a protective film to isolate air and moisture, preventing oxidation and corrosion of the metal surface. The protective layer 10 is prepared from epoxy resin. Epoxy resin can form a corrosion-resistant protective layer 10 on the metal surface, extending the service life of the material. The high-temperature resistant layer 11 is prepared from nickel-chromium alloy, and the heat-conducting layer 12 is prepared from graphite. Nickel-chromium alloy can maintain its mechanical properties and chemical stability at extremely high temperatures and is suitable as a raw material for pipeline materials or coatings. Graphite filler is usually mixed with a suitable adhesive to form a composite material with good heat conductivity, which is used to fill the voids of the pipeline or coat the pipeline surface.

[0026] Working principle: During the petroleum cracking process, water is injected into the seamless steel pipe through the water inlet pipe 4 provided on the outer wall. The water moves along the drainage groove 18 provided on the outer wall of the inner tube 17 and then flows out through the drainage pipe 5, achieving continuous water cooling of the inner tube 17 and preventing damage to the material due to excessive temperature inside the seamless pipe. Silicon dioxide can form a stable oxide layer at high temperatures, providing good insulation and chemical corrosion resistance. Polyvinyl chloride can be used to cover the metal surface, providing mechanical and chemical protection. Acrylic resin can form a protective film to isolate air and moisture, preventing oxidation and corrosion of the metal surface. Epoxy resin can form a corrosion-resistant protective layer 10 on the metal surface, extending the service life of the material. Nickel-chromium alloy can maintain its mechanical properties and chemical stability at extremely high temperatures and is suitable as a raw material for pipeline materials or coatings. Graphite filler is usually mixed with a suitable adhesive to form a composite material with good heat conductivity, which is used to fill the voids of the pipeline or coat the pipeline surface.

[0027] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A seamless steel pipe for antioxidant and high-temperature resistant petroleum cracking, comprising an outer pipe (1), characterized in that: A connecting rod (2) is fixedly connected to the left side of the outer tube (1). An external thread (3) is provided on the outer wall of the connecting rod (2). A water inlet (13) is opened at the left end of the outer wall of the outer tube (1). A drain port (14) is opened at the right end of the water inlet (13). A water inlet pipe (4) is fixedly connected inside the water inlet (13). A drain pipe (5) is fixedly connected inside the drain port (14). An antioxidant layer (6) is provided on the outer wall of the drain pipe (5). A plurality of reinforcing ribs (7) are fixedly connected to the inner wall of the antioxidant layer (6). A first anti-corrosion layer (8) is provided on the bottom side of the reinforcing rib (7). A second anti-corrosion layer (9) is provided inside the first anti-corrosion layer (8). A protective layer (10) is provided inside the second anti-corrosion layer (9). A high-temperature resistant layer (11) is provided inside the protective layer (10). A heat-conducting layer (12) is provided inside the high-temperature resistant layer (11). The left side of the heat-conducting layer (12) is connected to the right side of the connecting rod (2).

2. The seamless steel pipe for antioxidant and high-temperature resistant petroleum cracking according to claim 1, wherein: A limiting groove (15) is opened at the right end inside the outer tube (1). An internal thread (16) is provided inside the limiting groove (15). The outer wall of the connecting rod (2) is threadedly connected to the inner wall of the limiting groove (15).

3. The seamless steel pipe for antioxidant and high-temperature resistant petroleum cracking according to claim 1, wherein: An inner tube (17) is fixedly connected inside the outer tube (1). A drain groove (18) is opened on the outer wall of the inner tube (17).

4. A seamless steel pipe for antioxidant and high-temperature resistant petroleum cracking according to claim 1, characterized in that: The antioxidant layer (6) is prepared from silicon dioxide as a raw material.

5. The seamless steel pipe for antioxidant and high-temperature resistant petroleum cracking according to claim 1, characterized in that: The first anti-corrosion layer (8) is prepared from polyvinyl chloride as a raw material. The second anti-corrosion layer (9) is prepared from acrylic resin as a raw material.

6. The seamless steel pipe for antioxidant and high-temperature resistant petroleum cracking according to claim 1, characterized in that: The protective layer (10) is prepared from epoxy resin as a raw material.

7. A seamless steel pipe for antioxidant and high-temperature resistant petroleum cracking according to claim 1, characterized in that: The high-temperature resistant layer (11) is prepared from chromium-nickel alloy as a raw material. The heat-conducting layer (12) is prepared from graphite as a raw material.

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