Corrosion-resistant chemical reaction kettle liner structure

Abstract

The utility model discloses a kind of corrosion-resistant chemical reaction kettle inner container structure, including inner container base material layer, transition layer, corrosion-resistant function layer, the inner container base material layer is as the basis support structure of inner container, the inner container base material layer is made of high-strength stainless steel material, the transition layer is set to the inner side surface of inner container base material layer, the transition layer is prepared by plasma spraying process using nickel-chromium alloy material, the corrosion-resistant function layer is set to the inner side surface of transition layer, the corrosion-resistant function layer is the core structure that inner container resists corrosive medium;Corrosion-resistant function layer is closely combined with transition layer, inner container base material layer, not easy to fall off, wear, and with good high-temperature resistance, wear resistance, prolong the service life of inner container, even if corrosion-resistant function layer appears partial damage, can be repaired by the way of local repair, without overall replacement inner container, greatly reduce the maintenance cost and downtime of equipment.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a corrosion-resistant chemical reactor inner liner structure. Background Technology

[0002] In chemical production processes, the reactor is the core equipment for realizing chemical reactions, and the inner liner, as a key component that directly contacts the reaction medium, directly affects the service life and production safety of the reactor. Currently, most commercially available chemical reactor inner liners are made of a single metal material or a simple coating structure.

[0003] However, when dealing with highly corrosive media such as strong acids, strong alkalis, and high-concentration salt solutions, these traditional inner tank structures have obvious shortcomings: single-metal inner tanks, although possessing a certain strength, have limited corrosion resistance and are easily corroded after long-term use, leading to holes and cracks in the inner tank. This not only affects reaction efficiency but may also cause leakage of reaction media, resulting in safety accidents. The coating of simple coated inner tanks has weak adhesion to the metal substrate. Under complex reaction conditions such as high temperature, high pressure, or stirring, the coating is prone to peeling off and cracking, losing its protective function. Moreover, once the coating is damaged, repair is difficult and requires shutdown and replacement of the inner tank, increasing production costs and production cycle. Therefore, we propose a corrosion-resistant chemical reactor inner tank structure. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this utility model provides a corrosion-resistant chemical reactor inner liner structure. The corrosion-resistant functional layer is tightly bonded to the transition layer and the inner liner substrate layer, making it difficult to fall off or wear. It also has good high-temperature resistance and wear resistance, extending the service life of the inner liner. Even if the corrosion-resistant functional layer is partially damaged, it can be repaired through local repair without replacing the entire inner liner, greatly reducing equipment maintenance costs and downtime.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a corrosion-resistant chemical reactor inner liner structure, comprising an inner liner substrate layer, a transition layer, and a corrosion-resistant functional layer. The inner liner substrate layer serves as the basic support structure of the inner liner and is made of high-strength stainless steel. The transition layer is disposed on the inner surface of the inner liner substrate layer and is prepared by plasma spraying using a nickel-chromium alloy material. The corrosion-resistant functional layer is disposed on the inner surface of the transition layer and is the core structure of the inner liner to resist corrosive media. The corrosion-resistant functional layer is made of a composite material of polytetrafluoroethylene and silicon carbide and is tightly bonded to the transition layer by a molding process. The outer wall is provided with a reinforcing structure, which includes annular reinforcing ribs and longitudinal reinforcing ribs disposed on the outer side of the inner liner substrate layer. A discharge port is provided at the center of the bottom end of the inner liner.

[0006] As a preferred technical solution of this utility model, a reaction vessel shell is installed on the outer side of the inner liner substrate layer, and a strip-shaped groove adapted to the outer surface of the longitudinal reinforcing rib is opened on the inner wall of the reaction vessel shell, and a vent is provided on the side wall of the reaction vessel shell.

[0007] As a preferred embodiment of this utility model, the annular reinforcing ribs are spaced apart along the axial direction of the inner liner, and the longitudinal reinforcing ribs are evenly distributed along the circumference of the inner liner. Both the annular and longitudinal reinforcing ribs are made of the same stainless steel material as the inner liner substrate layer, and the annular and longitudinal reinforcing ribs are fixedly connected to the inner liner substrate layer by welding.

[0008] As a preferred embodiment of this utility model, both the annular reinforcing rib and the longitudinal reinforcing rib have circular holes on their surfaces.

[0009] As a preferred embodiment of this utility model, sealing grooves are provided at the top and bottom edges of the inner liner substrate layer, and corrosion-resistant sealing rings are installed in the sealing grooves. The sealing rings are made of fluororubber.

[0010] As a preferred embodiment of this utility model, the cross-section of the annular reinforcing rib is rectangular, the width of the annular reinforcing rib is 8mm, the thickness of the annular reinforcing rib is 8mm, the cross-section of the longitudinal reinforcing rib is trapezoidal, the upper base width of the longitudinal reinforcing rib is 15mm, the lower base width of the longitudinal reinforcing rib is 25mm, and the thickness of the longitudinal reinforcing rib is 15mm.

[0011] As a preferred technical solution of this utility model, the parameters of the plasma spraying process are: spraying voltage 32-35V, current 140-150A, spraying distance 110-120mm; and the parameters of the molding process are: molding pressure 18-20MPa, molding temperature 170-180℃, and holding time 25-30min.

[0012] Compared with the prior art, the beneficial effects that this utility model can achieve are: 1. The corrosion-resistant functional layer is tightly bonded to the transition layer and the inner liner substrate layer, making it difficult to fall off or wear. It also has good high temperature resistance and wear resistance, which extends the service life of the inner liner. Even if the corrosion-resistant functional layer is partially damaged, it can be repaired by local repair without replacing the entire inner liner, which greatly reduces the maintenance cost and downtime of the equipment.

[0013] 2. The inner liner base layer is made of high-strength stainless steel, and is combined with the outer ring reinforcing ribs and longitudinal reinforcing ribs, which significantly improves the overall structural strength and deformation resistance of the inner liner. It can withstand the high temperature, high pressure and stirring impact during the reaction process, avoid the inner liner from bulging and deformation failures, and ensure the safe operation of the reactor. Attached Figure Description

[0014] Figure 1 This is a top view schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a partial sectional view of the inner liner of this utility model.

[0016] Figure 3 This is a side view of the inner liner structure of this utility model.

[0017] The components are: 1. Inner liner substrate layer; 2. Transition layer; 3. Corrosion-resistant functional layer; 4. Annular reinforcing rib; 5. Longitudinal reinforcing rib; 6. Sealing groove; 7. Sealing ring; 8. Round hole; 9. Discharge port; 10. Reactor shell; 11. Vent; 12. Strip groove. Detailed Implementation

[0018] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation are all within the protection scope of this utility model without creative effort.

[0019] For an example, please refer to... Figure 1 , Figure 2 , Figure 3As shown, this utility model provides a corrosion-resistant chemical reactor inner liner structure, including an inner liner substrate layer 1, a transition layer 2, and a corrosion-resistant functional layer 3. The inner liner substrate layer 1 serves as the basic support structure of the inner liner and is made of high-strength stainless steel. The transition layer 2 is located on the inner surface of the inner liner substrate layer 1 and is made of nickel-chromium alloy material through a plasma spraying process. The corrosion-resistant functional layer 3 is located on the inner surface of the transition layer 2 and is the core structure of the inner liner to resist corrosive media. The corrosion-resistant functional layer 3 is made of polytetrafluoroethylene and silicon carbide composite material and is tightly bonded to the transition layer 2 through a molding process. The outer wall of the inner liner substrate layer 1 is provided with a reinforcing structure, including annular reinforcing ribs 4 and longitudinal reinforcing ribs 5 located on the outer side of the inner liner substrate layer 1. A discharge port 9 is provided at the center of the bottom end of the inner liner. Through the dual protective structure of transition layer 2 and corrosion-resistant functional layer 3, the nickel-chromium alloy of transition layer 2 has a certain corrosion resistance and can enhance the bonding force with corrosion-resistant functional layer 3. Corrosion-resistant functional layer 3 is made of polytetrafluoroethylene and silicon carbide composite. The chemical stability of polytetrafluoroethylene and the high strength and high wear resistance of silicon carbide combine to enable the inner liner to effectively resist the erosion of various highly corrosive media such as strong acids, strong alkalis and high concentrations of salt solutions, solving the problem of easy corrosion of traditional inner liners. The corrosion-resistant functional layer 3 is tightly bonded to transition layer 2 and inner liner substrate layer 1, and is not easy to fall off or wear. It also has good high temperature resistance and wear resistance, extending the service life of the inner liner. Even if the corrosion-resistant functional layer 3 is partially damaged, it can be repaired by local repair without replacing the entire inner liner, which greatly reduces the maintenance cost and downtime of the equipment.

[0020] like Figure 1 As shown, a reactor shell 10 is installed on the outer side of the inner liner substrate layer 1. The inner wall of the reactor shell 10 is provided with a strip groove 12 that matches the outer surface of the longitudinal reinforcing rib 5. A vent 11 is provided on the side wall of the reactor shell 10. By providing a strip groove 12 that matches the outer surface of the longitudinal reinforcing rib 5 on the inner wall of the reactor shell 10, the inner liner is limited and installed inside the reactor.

[0021] like Figure 3 As shown, the annular reinforcing ribs 4 are spaced apart along the axial direction of the inner liner, and the longitudinal reinforcing ribs 5 are evenly distributed along the circumference of the inner liner. Both the annular reinforcing ribs 4 and the longitudinal reinforcing ribs 5 are made of the same stainless steel as the inner liner substrate layer. The annular reinforcing ribs 4 and the longitudinal reinforcing ribs 5 are fixedly connected to the inner liner substrate layer 1 by welding. The inner liner substrate layer 1 is made of high-strength stainless steel. With the help of the outer annular reinforcing ribs 4 and the longitudinal reinforcing ribs 5, the overall structural strength and deformation resistance of the inner liner are significantly improved. It can withstand the high temperature, high pressure and stirring impact during the reaction process, avoid the inner liner from bulging and deformation failures, and ensure the safe operation of the reactor.

[0022] like Figure 1 , Figure 3 As shown, both the annular reinforcing rib 4 and the longitudinal reinforcing rib 5 have circular holes 8 on their surfaces.

[0023] like Figure 1 , Figure 2 As shown, sealing grooves 6 are provided at the top and bottom edges of the inner liner substrate layer 1, and corrosion-resistant sealing rings 7 are installed in the sealing grooves 6. The sealing rings 7 are made of fluororubber. The sealing rings 7 are made of fluororubber and can fit tightly with the reactor body to achieve a good sealing effect and prevent leakage of the reaction medium.

[0024] like Figure 3 As shown, the cross-section of the annular reinforcing rib 4 is rectangular, the width of the annular reinforcing rib 4 is 8mm, and the thickness of the annular reinforcing rib 4 is 8mm. The cross-section of the longitudinal reinforcing rib 5 is trapezoidal, the upper base width of the longitudinal reinforcing rib 5 is 15mm, the lower base width of the longitudinal reinforcing rib 5 is 25mm, and the thickness of the longitudinal reinforcing rib 5 is 15mm.

[0025] like Figure 1 As shown, the parameters for plasma spraying are: spraying voltage 32-35V, current 140-150A, spraying distance 110-120mm. The parameters for molding are: molding pressure 18-20MPa, molding temperature 170-180℃, and holding time 25-30min.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant chemical reactor inner liner structure, comprising an inner liner substrate layer (1), a transition layer (2), and a corrosion-resistant functional layer (3), characterized in that: The inner liner substrate layer (1) serves as the basic support structure of the inner liner. The inner liner substrate layer (1) is made of high-strength stainless steel. The transition layer (2) is located on the inner surface of the inner liner substrate layer (1). The transition layer (2) is made of nickel-chromium alloy material through plasma spraying. The corrosion-resistant functional layer (3) is located on the inner surface of the transition layer (2). The corrosion-resistant functional layer (3) is the core structure of the inner liner to resist corrosive media. The corrosion-resistant functional layer (3) is made of polytetrafluoroethylene and silicon carbide composite material. The corrosion-resistant functional layer (3) is tightly bonded to the transition layer (2) through molding. The outer wall of (1) is provided with a reinforcing structure. The reinforcing structure includes annular reinforcing ribs (4) and longitudinal reinforcing ribs (5) located on the outer side of the inner liner substrate layer (1). The discharge port (9) is located at the center of the bottom end of the inner liner.

2. The corrosion-resistant chemical reactor inner liner structure according to claim 1, characterized in that: The outer side of the inner liner substrate layer (1) is fitted with a reactor shell (10). The inner wall of the reactor shell (10) is provided with a strip groove (12) that matches the outer surface of the longitudinal reinforcing rib (5). The side wall of the reactor shell (10) is provided with a vent (11).

3. The corrosion-resistant chemical reactor inner liner structure according to claim 1, characterized in that: The annular reinforcing ribs (4) are spaced apart along the axial direction of the inner liner, and the longitudinal reinforcing ribs (5) are evenly distributed along the circumference of the inner liner. Both the annular reinforcing ribs (4) and the longitudinal reinforcing ribs (5) are made of the same stainless steel material as the inner liner substrate layer. The annular reinforcing ribs (4) and the longitudinal reinforcing ribs (5) are fixedly connected to the inner liner substrate layer (1) by welding.

4. The corrosion-resistant chemical reactor inner liner structure according to claim 1, characterized in that: Both the annular reinforcing rib (4) and the longitudinal reinforcing rib (5) have round holes (8) on their surfaces.

5. The corrosion-resistant chemical reactor inner liner structure according to claim 1, characterized in that: The inner liner substrate layer (1) is provided with sealing grooves (6) at the top and bottom edges, and corrosion-resistant sealing rings (7) are installed in the sealing grooves (6). The sealing rings (7) are made of fluororubber.

6. The corrosion-resistant chemical reactor inner liner structure according to claim 1, characterized in that: The cross-section of the annular reinforcing rib (4) is rectangular, the width of the annular reinforcing rib (4) is 8mm, the thickness of the annular reinforcing rib (4) is 8mm, the cross-section of the longitudinal reinforcing rib (5) is trapezoidal, the upper base width of the longitudinal reinforcing rib (5) is 15mm, the lower base width of the longitudinal reinforcing rib (5) is 25mm, and the thickness of the longitudinal reinforcing rib (5) is 15mm.

7. The corrosion-resistant chemical reactor inner liner structure according to claim 1, characterized in that: The parameters of the plasma spraying process are: spraying voltage 32-35V, current 140-150A, spraying distance 110-120mm; and the parameters of the molding process are: molding pressure 18-20MPa, molding temperature 170-180℃, and holding time 25-30min.

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