A wear-resistant corrosion-resistant lining structure for a slag cooler

Abstract

The utility model relates to a cold slag machine technical field, concretely for a kind of wear-resistant corrosion-resistant lining structure for cold slag machine, including workbench, the workbench is equipped with drive cylinder, the drive cylinder is supported by four groups of driving roller on workbench;The lining structure of the drive cylinder includes base layer, wear layer and corrosion-resistant layer;The base layer is the base layer of lining structure, material is high-strength heat-resistant alloy steel;The wear layer is arranged at the inner side of base layer, and the wear layer is made of tungsten carbide particle and nickel-based alloy compound, utilizes the high hardness of tungsten carbide and the toughness of nickel-based alloy, can effectively resist the high-frequency scouring and friction of high-temperature furnace slag, reduce lining wear rate, and the chemical nickel-phosphorus alloy corrosion-resistant layer can be isolated sulfide, chloride and other corrosive media by virtue of its dense pore-free structure, so that lining corrosion resistance is improved, the service life of cold slag machine lining is greatly extended, and replacement frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cold slag machine technology, specifically to a wear-resistant and corrosion-resistant inner lining structure for a cold slag machine. Background Technology

[0002] The slag cooler is a key piece of equipment in the slag removal system of a boiler in a thermal power plant. It is mainly used to cool high-temperature slag to a transportable temperature and to facilitate the transport of the slag.

[0003] During the operation of a slag cooler, the lining needs to withstand the scouring and friction of high-temperature slag, as well as the erosion of corrosive gases and media for a long time. Currently, the existing lining structures of slag coolers have poor wear resistance and corrosion resistance, which makes the lining easy to wear and corrode. This not only affects the normal operation and service life of the slag cooler, but also increases the maintenance cost and downtime of the equipment. Therefore, this utility model proposes a wear-resistant and corrosion-resistant lining structure for slag coolers to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a wear-resistant and corrosion-resistant lining structure for a slag cooler, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wear-resistant and corrosion-resistant inner lining structure for a cold slag machine, including a workbench, wherein a drive cylinder is provided on the workbench, and the drive cylinder is supported by four sets of drive rollers on the workbench;

[0006] The inner lining structure of the feed cylinder includes a base layer, a wear-resistant layer, and an anti-corrosion layer;

[0007] The substrate layer is the basic layer of the inner lining structure and is made of high-strength heat-resistant alloy steel.

[0008] The wear-resistant layer is disposed on the inner side of the substrate layer and is composed of tungsten carbide particles and nickel-based alloy through powder metallurgy process, with the tungsten carbide particles uniformly distributed in the nickel-based alloy.

[0009] The anti-corrosion layer is located inside the wear-resistant layer and is a chemically plated nickel-phosphorus alloy layer.

[0010] Preferably, the thickness of the wear-resistant layer is 5-8 mm.

[0011] Preferably, the thickness of the anti-corrosion layer is 0.2-0.5 mm.

[0012] Preferably, the outer surface of the substrate layer is provided with a plurality of raised reinforcing ribs, and the plurality of reinforcing ribs are distributed in an array.

[0013] Preferably, the wear-resistant layer and the substrate layer are connected by a hot-pressing sintering process.

[0014] Preferably, the anti-corrosion layer and the wear-resistant layer are connected by a chemical plating process.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) The wear-resistant layer composed of tungsten carbide particles and nickel-based alloys can effectively resist the high-frequency scouring and friction of high-temperature slag by utilizing the extremely high hardness of tungsten carbide and the toughness of nickel-based alloys, thereby reducing the wear rate of the lining. Meanwhile, the chemically plated nickel-phosphorus alloy anti-corrosion layer can isolate corrosive media such as sulfides and chlorides by virtue of its dense and non-porous structure, thereby improving the corrosion resistance of the lining, greatly extending the service life of the slag cooler lining, and reducing the frequency of replacement.

[0017] (2) A stable mechanical support structure can be formed by the high-strength heat-resistant alloy steel substrate layer and the reinforcing ribs distributed in an array on the outer surface. This effectively disperses the stress caused by high temperature and vibration during the operation of the cold slag machine, and avoids substrate deformation. In addition, the hot pressing sintering process can ensure that the wear-resistant layer and the substrate layer achieve metallurgical bonding with a bonding strength of more than 300MPa. The chemical plating process can make the anti-corrosion layer and the wear-resistant layer fit tightly together. Through the synergistic effect between the layers, the overall reliability of the lining structure is significantly improved, the risk of equipment downtime caused by lining failure is reduced, and maintenance costs and production interruption losses are reduced. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the material drive cylinder structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the inner lining structure of this utility model.

[0021] Figure 4 This is a schematic diagram showing the disassembled inner lining structure of this utility model.

[0022] In the figure: 1. Workbench; 11. Drive roller; 2. Drive cylinder; 3. Base layer; 31. Reinforcing rib; 4. Wear-resistant layer; 5. Corrosion-resistant layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: a wear-resistant and corrosion-resistant inner lining structure for a cold slag machine, including a workbench 1, a drive cylinder 2 on the workbench 1, the drive cylinder 2 being supported by four sets of drive rollers 11 on the workbench 1, and the inner lining structure of the drive cylinder 2 including a base layer 3, a wear-resistant layer 4, and an anti-corrosion layer 5; the base layer 3 is the basic layer of the inner lining structure, and is made of high-strength heat-resistant alloy steel; the wear-resistant layer 4 is disposed on the inner side of the base layer 3, and is composed of tungsten carbide particles and nickel-based alloy through powder metallurgy, with the tungsten carbide particles uniformly distributed in the nickel-based alloy; the anti-corrosion layer 5 is disposed on the inner side of the wear-resistant layer 4, and is a chemically plated nickel-phosphorus alloy layer.

[0025] The wear-resistant layer 4, composed of tungsten carbide particles and nickel-based alloy, effectively resists the high-frequency scouring and friction of high-temperature slag by utilizing the extremely high hardness of tungsten carbide and the toughness of nickel-based alloy, thus reducing the wear rate of the lining. Meanwhile, the chemically plated nickel-phosphorus alloy anti-corrosion layer 5, with its dense and non-porous structure, can isolate corrosive media such as sulfides and chlorides, thereby improving the corrosion resistance of the lining, significantly extending the service life of the slag cooler lining, and reducing the frequency of replacement.

[0026] Please see Figures 1 to 4 The thickness of wear-resistant layer 4 is 5-8mm.

[0027] Please see Figures 1 to 4 The thickness of the anti-corrosion layer 5 is 0.2-0.5mm.

[0028] Please see Figures 1 to 4 The outer surface of the substrate layer 3 is provided with multiple raised reinforcing ribs 31, which are arranged in an array. The high-strength heat-resistant alloy steel substrate layer 3, together with the array of reinforcing ribs 31 on the outer surface, can form a stable mechanical support structure, effectively dispersing the stress caused by high temperature and vibration during the operation of the slag cooler and avoiding substrate deformation.

[0029] Please see Figures 1 to 4 The wear-resistant layer 4 and the base layer 3 are connected by a hot-pressing sintering process. Under high temperature and high pressure, the wear-resistant layer 4, composed of tungsten carbide particles and nickel-based alloy, and the high-strength heat-resistant alloy steel base layer 3 can achieve metallurgical bonding with a bonding strength of over 300 MPa. Compared with ordinary welding or coating processes, this connection method can effectively avoid interlayer peeling and cracking.

[0030] Please see Figures 1 to 4The anti-corrosion layer 5 and the wear-resistant layer 4 are connected by a chemical plating process. Because the anti-corrosion layer 5 and the wear-resistant layer 4 are connected by a chemical plating process, atomic-level diffusion bonding can be achieved. The interfacial bonding strength can reach 200-300MPa, which is much higher than that of conventional bonding processes. Under the complex working conditions of high temperature and frequent vibration in the cold slag machine, the anti-corrosion layer 5 is not easy to fall off or blister. It works closely with the wear-resistant layer 4 to ensure the long-term stability of the lining structure and greatly reduce the risk of failure caused by interlayer separation.

[0031] During the operation of the slag cooler, four sets of drive rollers 11 on the workbench 1 drive the feed cylinder 2 to rotate. High-temperature slag enters the feed cylinder 2. First, the base layer 3, as the basic structure, provides stable support for the entire lining with its high-strength heat-resistant alloy steel material and the array of reinforcing ribs 31 on its outer surface. It withstands the mechanical stress caused by the rotation of the feed cylinder 2 and the gravity of the high-temperature slag. Simultaneously, the reinforcing ribs 31 disperse stress, preventing deformation of the base layer 3. As the feed cylinder 2 rotates, the high-temperature slag tumbles and moves inside, generating friction and erosion with the lining structure. At this time, the wear-resistant layer 4 plays a crucial role. Its uniformly distributed tungsten carbide particles have extremely high hardness, effectively resisting the friction of the slag. The wear-resistant layer 4, with a thickness of 5-8mm, can withstand the continuous erosion of the slag for a long time, reducing wear and extending the service life of the lining. Meanwhile... The corrosive substances such as sulfides and chlorides contained in the slag, as well as the corrosive gases generated at high temperatures, will attempt to corrode the lining. The anti-corrosion layer 5 is made of chemically plated nickel-phosphorus alloy. With its dense structure, it acts as a protective barrier, preventing corrosive media from penetrating inward and protecting the internal wear-resistant layer 4 and substrate layer 3 from corrosion. The anti-corrosion layer 5, with a thickness of 0.2-0.5mm, can effectively isolate corrosion and ensure the stable operation of the lining structure in complex corrosive environments. In addition, the wear-resistant layer 4 and the substrate layer 3 are tightly connected through a hot-pressing sintering process, and the anti-corrosion layer 5 and the wear-resistant layer 4 are firmly bonded through a chemical plating process. This allows the three layers to work synergistically to ensure the wear resistance and corrosion resistance of the slag cooler lining during the continuous operation of the feed cylinder 2 in processing high-temperature slag, reducing the number of maintenance and downtime caused by lining damage.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant and corrosion-resistant inner lining structure for a slag cooler, comprising a workbench (1), wherein a drive cylinder (2) is provided on the workbench (1), and the drive cylinder (2) is supported by four sets of drive rollers (11) on the workbench (1), characterized in that: The inner lining structure of the feed cylinder (2) includes a base layer (3), a wear-resistant layer (4), and an anti-corrosion layer (5); The substrate layer (3) is the base layer of the inner lining structure, and the material is high-strength heat-resistant alloy steel; The wear-resistant layer (4) is disposed on the inner side of the substrate layer (3) and is composed of tungsten carbide particles and nickel-based alloy through powder metallurgy process. The tungsten carbide particles are uniformly distributed in the nickel-based alloy. The anti-corrosion layer (5) is disposed on the inner side of the wear-resistant layer (4) and is a chemically plated nickel-phosphorus alloy layer.

2. The wear-resistant and corrosion-resistant lining structure for a slag cooler according to claim 1, characterized in that: The wear-resistant layer (4) has a thickness of 5-8 mm.

3. The wear-resistant and corrosion-resistant lining structure for a slag cooler according to claim 2, characterized in that: The thickness of the anti-corrosion layer (5) is 0.2-0.5 mm.

4. The wear-resistant and corrosion-resistant lining structure for a slag cooler according to claim 1, characterized in that: The outer surface of the substrate layer (3) is provided with a plurality of raised reinforcing ribs (31), and the plurality of reinforcing ribs (31) are arranged in an array.

5. The wear-resistant and corrosion-resistant lining structure for a slag cooler according to claim 1, characterized in that: The wear-resistant layer (4) and the base layer (3) are connected by a hot pressing sintering process.

6. The wear-resistant and corrosion-resistant lining structure for a slag cooler according to claim 1, characterized in that: The anti-corrosion layer (5) and the wear-resistant layer (4) are connected by a chemical plating process.

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