Thin-wall high-temperature-resistant reaction kettle

Abstract

According to the thin-wall high-temperature-resistant reaction kettle provided by the invention, breakthrough improvement of the thin-wall high-temperature-resistant reaction kettle is realized through collaborative innovation of a corrugated-honeycomb composite cylinder structure, a W microalloyed GH4169 material and a gradient heat treatment process; the corrugated outer wall and the honeycomb jacket supporting layer form a space truss type bearing system, so that the equivalent flexural rigidity of the thin-wall cylinder is obviously improved, the critical instability pressure reaches 15 MPa under the working condition of 1100 DEG C, and the strength bottleneck of a traditional thin-wall structure is broken through; after the W-strengthened GH4169 alloy with specific components is subjected to two-stage aging treatment, the size of a gamma ''strengthening phase is controlled to be 20-150nm, and the yield strength at 1100 DEG C is improved to 120MPa and is obviously improved compared with that of a traditional alloy; an aluminizing-chroming composite layer and shot peening strengthening have a synergistic effect, so that the oxidation rate is obviously reduced, and the service life of equipment is prolonged by 3 times; and the vibration transmissibility is effectively reduced by the steel slag-mica damping filler, so that stable operation is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of reactors, in particular to a thin-walled high-temperature resistant reactor. Background Art

[0002] High-temperature reactors are critical equipment in the chemical industry, materials synthesis, and other fields. They must withstand temperatures exceeding 1100°C for extended periods, particularly during CVD coating processes. Traditional high-temperature reactors are typically constructed with nickel-based alloys (such as Inconel 600) with thicker walls (≥15mm). This increased material usage ensures high-temperature strength, but this results in increased weight, high thermal inertia, and a manufacturing cost increase of over 30%.

[0003] Existing technologies attempt to reduce wall thickness through structural optimization, such as through the "reinforcement ring + external support frame" structure, but it still has significant defects:

[0004] 1) The welding point between the reinforcing ring and the cylinder generates stress concentration (stress concentration factor > 2.5) due to the right-angle transition, which is easy to induce cracks under thermal cycling conditions;

[0005] 2) Single-layer thin-walled structures (8-10 mm) have insufficient creep resistance at 1100°C. The yield strength of standard GH4169 alloy at this temperature is only 95 MPa, which cannot meet long-term pressure requirements.

[0006] 3) Conventional aluminized surface treatments are prone to peeling when thin-walled components deform at high temperatures, accelerating oxidation and corrosion of the substrate. Furthermore, traditional rigid support frames transmit equipment vibrations to the piping system, causing fatigue failure at the joints.

[0007] Therefore, there is an urgent need to develop a reactor structure that is thin-walled and lightweight, high-temperature creep resistant, stress-concentration resistant, and vibration-isolating, so as to reduce costs while ensuring the safety of 1100°C working conditions. Summary of the Invention

[0008] The purpose of the present invention is to provide a thin-walled high-temperature resistant reactor to solve the problems existing in the above-mentioned prior art.

[0009] To achieve the above object, the present invention provides the following solutions:

[0010] The present invention provides a thin-walled high-temperature resistant reactor, comprising:

[0011] The top of the cylinder is connected to the kettle cover through a sealing flange, and the bottom of the cylinder is provided with a conical head;

[0012] A feed inlet, the feed inlet being arranged on the top of the kettle cover;

[0013] A discharge port, the discharge port being arranged at the bottom of the conical head;

[0014] A support frame is fixed to the lower part of the cylinder, and a damping shock-absorbing foot is provided at the bottom of the support frame.

[0015] Preferably, the cylinder comprises, from the outside to the inside, a welded corrugated outer wall, a honeycomb jacket support layer and an inner cylinder.

[0016] Preferably, the corrugated outer wall includes an outer base layer with a thickness of 3 mm. The outer base layer is cold rolled to form corrugated reinforcement ribs, and a transverse reinforcement ring is provided in the middle of the outer base layer.

[0017] Preferably, the outer base layer is subjected to aluminizing-chromium composite treatment and shot peening treatment.

[0018] Preferably, the honeycomb jacket support layer is formed by electroforming a nickel alloy substrate to form a honeycomb unit, and the side length of the honeycomb unit is 10 mm and the thickness is 2 mm.

[0019] Preferably, the inner cylinder is made of GH4169 alloy, whose composition includes Ni52.0-53.5wt%, Cr19.0-20.0wt%, Nb and Ta 5.25-5.45wt%, Mo3.0-3.2wt%, W1.0-1.5wt%, C0.04-0.06wt%, and the balance is Fe. Its thickness is 8mm.

[0020] Preferably, the inner cylinder adopts a heat treatment process, and the heat treatment process includes:

[0021] 1) Primary treatment: heating to 715-725°C for 8 hours and cooling to 630°C;

[0022] 2) Secondary treatment: heating to 635-645°C for 10 hours and air cooling to room temperature;

[0023] 3) Tempering treatment: first heat to 900℃ for 1h, then cool to 800℃ for 4h, and air cool to room temperature.

[0024] Preferably, the kettle cover is provided with a pressure gauge, a stirring device, a heating device and a pressure regulating device.

[0025] Preferably, the damping and shock-absorbing foot includes a stuffing bottom box, the bottom of which is provided with a mounting side plate, a pear-shaped support head is provided inside the stuffing bottom box, the pear-shaped support head is fixedly connected to the bottom of the support frame, and damping stuffing is sealed and filled between the stuffing bottom box and the pear-shaped support head.

[0026] Preferably, the damping filler is a mixture of steel slag and mica flakes, with a mass ratio of 1:1.

[0027] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0028] The present invention provides a thin-walled high-temperature resistant reactor. This reactor achieves a breakthrough improvement through the collaborative innovation of a corrugated-honeycomb composite cylinder structure, W microalloyed GH4169 material, and a gradient heat treatment process. The corrugated outer wall and the honeycomb jacket support layer form a spatial truss-type load-bearing system, significantly improving the equivalent bending stiffness of the thin-walled cylinder. The critical buckling pressure reaches 15 MPa at 1100°C, breaking through the strength bottleneck of traditional thin-walled structures. After a two-stage aging treatment, the W-reinforced GH4169 alloy with a specific composition controls the size of the γ" strengthening phase to 20-150 nm, and the yield strength at 1100°C is increased to 120 MPa, significantly higher than that of traditional alloys. The synergistic effect of the aluminized-chromium composite layer and shot peening significantly reduces the oxidation rate, extending the equipment life by three times. The steel slag-mica damping filler effectively reduces the vibration transmissibility, thereby ensuring stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic structural diagram of a thin-walled, high-temperature resistant reactor provided by the present invention;

[0031] Figure 2 A partial cross-sectional view of the thin-walled high-temperature resistant reactor cylinder provided by the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the damping and shock-absorbing feet in the thin-walled high-temperature resistant reactor provided by the present invention. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] The purpose of the present invention is to provide a thin-walled high-temperature resistant reactor to solve the problems existing in the prior art.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1:

[0037] This embodiment provides a thin-walled high-temperature resistant reactor, such as Figure 1 Shown, including:

[0038] Cylinder 1, the top of the cylinder 1 is connected to the kettle cover 2 through a sealing flange, and the bottom of the cylinder 1 is provided with a conical head 3;

[0039] The feed port 4 is provided on the top of the kettle cover 2;

[0040] The discharge port 5 is provided at the bottom of the conical head 3;

[0041] The support frame 6 is fixed to the lower part of the cylinder 1, and the bottom of the support frame 6 is provided with a damping and shock-absorbing foot 7.

[0042] In this embodiment, a detachable kettle cover 2 is used to facilitate maintenance without the need for an additional manhole, thereby avoiding stress concentration. The kettle cover 2 and the cylinder 1 can be connected by bolts, and a sealing ring should be provided in the sealing flange to ensure the sealing effect.

[0043] In this embodiment, the conical head 3 adopts a conical structure, which is not only convenient for discharging, but also adopts a double curvature gradient at the connection with the cylinder 1 (curvature radius R=5D, D is the inner diameter of the cylinder), which can eliminate sharp angles and reduce stress concentration.

[0044] It should be understood that the feed port 4 and the discharge port 5 in this embodiment can be provided with valves to control the inflow and outflow of materials, and they can also be provided with flange structures for connecting pipelines. These are conventional designs in this field and will not be described in detail in this application.

[0045] In this embodiment, the reactor is supported by the support frame 6 and is stably fixed on the work station by the damping and shock-absorbing feet 7, which can achieve the effect of damping and shock-absorbing when in use, ensuring stable operation.

[0046] As an implementation method, Figure 2 As shown, the cylinder 1 includes, from the outside to the inside, a welded corrugated outer wall 11, a honeycomb jacket support layer 12 and an inner cylinder 13. By arranging the corrugated outer wall 11 and the honeycomb jacket support layer 12, a layer of "exoskeleton" can be formed on the outside of the inner cylinder 13, thereby ensuring the overall strength and reducing stress concentration even when the wall thickness of the inner cylinder 13 is reduced.

[0047] Specifically, the corrugated outer wall 11 includes an outer base layer with a thickness of 3 mm. The outer base layer is cold rolled to form corrugated reinforcement ribs with a roller pressure of 50 tons, and then stress annealing is performed at 900°C for 10 minutes to eliminate stress. A transverse reinforcement ring 14 is provided in the middle of the outer base layer to ensure overall strength.

[0048] Furthermore, the outer base layer is subjected to aluminizing-chromium composite treatment and shot peening strengthening treatment. It is first chromized at 1000°C for 4 hours, during which argon gas is introduced for protection to form a Cr2O3 bottom layer; then it is aluminized at 900°C for 2 hours to generate an AlCrO3 outer film, thereby reducing the oxidation rate of the outer layer and improving its service life.

[0049] Furthermore, the honeycomb jacket support layer 12 uses a nickel alloy substrate to electroform a honeycomb unit. The side length of the honeycomb unit is 10 mm and its thickness is 2 mm. It is then connected by vacuum brazing. The brazing material is BNi-5 and the brazing temperature is 1050°C. The corrugated outer wall 11 and the honeycomb jacket support layer 12 form a spatial truss-type bearing system, which significantly improves the equivalent bending stiffness of the thin-walled cylinder. The critical instability pressure reaches 15 MPa under 1100°C working conditions, breaking through the strength bottleneck of traditional thin-walled structures.

[0050] As the core solution of this embodiment, the inner tube 13 is made of GH4169 alloy, whose composition includes Ni53wt%, Cr19wt%, Nb and Ta 5.3wt% in total, Mo3.1wt%, W1.2wt%, C0.05wt%, Fe18.35wt%, and its thickness is 8mm.

[0051] Furthermore, the inner barrel adopts a heat treatment process, and the heat treatment process includes:

[0052] 1) Primary treatment: heating to 720°C for 8 hours, then cooling to 630°C to nucleate the γ" phase;

[0053] 2) Secondary treatment: heating to 640°C for 10 hours and air cooling to room temperature to coarsen the γ" phase;

[0054] 3) Tempering treatment: first heat to 900℃ for 1h, then cool to 800℃ for 4h, and air cool to room temperature to eliminate residual stress.

[0055] In this embodiment, the inner cylinder 13 is made of W-reinforced GH4169 alloy with a specific composition and subjected to a double-stage aging treatment. The size of the γ" strengthening phase is controlled to be 20-150 nm, and the yield strength at 1100°C is increased to 120 MPa, which is significantly higher than that of traditional alloys.

[0056] As an embodiment, the kettle cover 2 is provided with accessories such as a pressure gauge, a stirring device, a heating device and a pressure regulating device, so as to realize functions such as pressure monitoring, stirring, heating, and pressure adjustment. Of course, these functional components can be increased or decreased according to actual needs. In other embodiments, other different functional components can also be selected according to needs. These are all existing technologies in this field, so they will not be repeated in this embodiment.

[0057] As an implementation method, Figure 3 As shown, the damping and shock-absorbing foot 7 includes a stuffing bottom box 71, the bottom of which is provided with a mounting side plate 72, a pear-shaped support head 73 provided inside the stuffing bottom box 71, and the pear-shaped support head 73 is fixedly connected to the bottom of the support frame 6, and a damping filler 74 is sealed and filled between the stuffing bottom box 71 and the pear-shaped support head 73.

[0058] Specifically, the damping filler 74 is made of a mixture of steel slag and mica sheets with a mass ratio of 1:1. The two can effectively increase the damping performance and cooperate with the pear-shaped support head 73 to effectively reduce the vibration transmission rate, thereby ensuring stable operation.

[0059] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] Example 2:

[0061] In this embodiment, the composition of the inner tube 13 is adjusted and GH4169 alloy is also used. The difference from Example 1 is that its composition includes Ni 52wt%, Cr 19wt%, Nb and Ta 5.25wt% in total, Mo 3.0wt%, W 1.0wt%, C 0.04wt%, Fe 19.71wt%, and its thickness is 8 mm.

[0062] Furthermore, the inner barrel adopts a heat treatment process, and the heat treatment process includes:

[0063] 1) Primary treatment: heating to 715°C for 8 hours, then cooling to 630°C to nucleate the γ" phase;

[0064] 2) Secondary treatment: heating to 645°C for 10 hours and air cooling to room temperature to coarsen the γ" phase;

[0065] 3) Tempering treatment: first heat to 900℃ for 1h, then cool to 800℃ for 4h, and air cool to room temperature to eliminate residual stress.

[0066] The inner cylinder 13 using the above materials and processes can also achieve similar effects as Example 1. The size of the γ" strengthening phase is controlled at 20-150nm, and the yield strength at 1100℃ is increased to 120MPa, which is significantly improved compared with traditional alloys.

[0067] Example 3:

[0068] In this embodiment, the composition of the inner cylinder 13 is adjusted and GH4169 alloy is also used. The difference from Example 1 is that its composition includes Ni 53.5wt%, Cr 20wt%, Nb and Ta 5.45wt% in total, Mo 3.2wt%, W 1.5wt%, C 0.06wt%, Fe 16.29wt%, and its thickness is 8 mm.

[0069] Furthermore, the inner barrel adopts a heat treatment process, and the heat treatment process includes:

[0070] 1) Primary treatment: heating to 725°C for 8 hours, then cooling to 630°C to nucleate the γ" phase;

[0071] 2) Secondary treatment: heating to 645°C for 10 hours and air cooling to room temperature to coarsen the γ" phase;

[0072] 3) Tempering treatment: first heat to 900℃ for 1h, then cool to 800℃ for 4h, and air cool to room temperature to eliminate residual stress.

[0073] The inner cylinder 13 using the above materials and processes can also achieve similar effects as Example 1. The size of the γ" strengthening phase is controlled at 20-150nm, and the yield strength at 1100℃ is increased to 120MPa, which is significantly improved compared with traditional alloys.

[0074] It should be noted that the components mentioned in the above embodiments are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0075] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A thin-walled high-temperature resistant reactor, characterized in that: include: The top of the cylinder is connected to the kettle cover through a sealing flange, and the bottom of the cylinder is provided with a conical head; A feed inlet, the feed inlet being arranged on the top of the kettle cover; A discharge port, the discharge port being arranged at the bottom of the conical head; A support frame is fixed to the lower part of the cylinder, and a damping shock-absorbing foot is provided at the bottom of the support frame.

2. The thin-walled high-temperature resistant reactor according to claim 1, characterized in that: The cylinder body comprises, from the outside to the inside, a welded corrugated outer wall, a honeycomb jacket support layer and an inner cylinder.

3. The thin-walled high-temperature resistant reactor according to claim 2, characterized in that: The corrugated outer wall includes an outer base layer with a thickness of 3 mm. The outer base layer is cold rolled to form corrugated reinforcement ribs, and a transverse reinforcement ring is provided in the middle of the outer base layer.

4. The thin-walled high-temperature resistant reactor according to claim 3, characterized in that: The outer base layer is subjected to aluminizing-chromium composite treatment and shot peening treatment.

5. The thin-walled high-temperature resistant reactor according to claim 2, characterized in that: The honeycomb jacket support layer adopts a nickel alloy substrate to electroform a honeycomb unit, and the side length of the honeycomb unit is 10 mm and the thickness is 2 mm.

6. The thin-walled high-temperature resistant reactor according to claim 2, characterized in that: The inner tube is made of GH4169 alloy, whose composition includes Ni52.0-53.5wt%, Cr19.0-20.0wt%, Nb and Ta 5.25-5.45wt%, Mo3.0-3.2wt%, W1.0-1.5wt%, C0.04-0.06wt%, and the balance is Fe. Its thickness is 8mm.

7. The thin-walled high-temperature resistant reactor according to claim 6, characterized in that: The inner cylinder adopts a heat treatment process, and the heat treatment process includes: 1) Primary treatment: heating to 715-725°C for 8 hours and cooling to 630°C; 2) Secondary treatment: heating to 635-645°C for 10 hours and air cooling to room temperature; 3) Tempering treatment: first heat to 900℃ for 1h, then cool to 800℃ for 4h, and air cool to room temperature.

8. The thin-walled high-temperature resistant reactor according to claim 1, characterized in that: The kettle cover is provided with a pressure gauge, a stirring device, a heating device and a pressure regulating device.

9. The thin-walled high-temperature resistant reactor according to claim 1, characterized in that: The damping and shock-absorbing foot includes a stuffing bottom box, the bottom of which is provided with an installation side plate, a pear-shaped support head is provided inside the stuffing bottom box, the pear-shaped support head is fixedly connected to the bottom of the support frame, and damping stuffing is sealed and filled between the stuffing bottom box and the pear-shaped support head.

10. The thin-walled high-temperature resistant reactor according to claim 9, characterized in that: The damping filler is a mixed material of steel slag and mica sheets, with a mass ratio of 1:1.

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