A kind of waste contact body tank erosion-resistant structure and waste contact body tank containing the structure

Abstract

The utility model relates to the polycrystal silicon production technical field discloses a kind of waste trigger body tank erosion-resistant structure and waste trigger body tank containing the structure, the erosion-resistant structure is located on the inner wall of waste trigger body tank silicon powder import place's tank body, by the wear plate combination for blocking silicon powder fluid scouring tank inner wall fixedly installed on the inner wall of waste trigger body tank tank body and the clamping fixed block of fixed wear plate combination are formed, two clamping fixed blocks are respectively fixedly connected with the inner wall of waste trigger body tank tank body, and the upper and lower ends of wear plate combination are respectively abutted on two clamping fixed blocks.The utility model is provided with a section of wear-resistant, erosion-resistant lining structure at the silicon powder import place of waste trigger body tank, the lining structure is more wear-resistant as a whole, greatly improves the erosion-resistant, grinding ability of waste trigger body tank inner wall, to further improve the service life of entire waste trigger body tank;And, also reduce equipment maintenance cost and shutdown maintenance time, and avoid the safety accident caused by high-risk medium leakage.

Description

Technical Field

[0001] This utility model relates to the field of polycrystalline silicon production technology, specifically to a erosion-resistant structure for a waste contact tank and a waste contact tank containing the structure. Background Technology

[0002] Waste catalyst tanks are a type of special pressure vessel used to store and transport waste containing hazardous chemicals, such as waste liquids or hazardous waste. In cold hydrogenation processes, the waste catalyst tank, as a pressure vessel, faces the following long-standing problem at its silicon powder inlet: During hydrogenation furnace maintenance, silicon powder needs to be unloaded into the waste catalyst tank through the silicon powder inlet. At this time, the medium exhibits characteristics of high speed, high pressure (2.6 MPa), high temperature (550℃), and high solid content (greater than 95%). Therefore, during the silicon powder unloading process, solid particles exert a strong erosive effect on the tank wall at the silicon powder inlet. Traditional waste catalyst tanks made of Q345R steel have a wall thickness of only 12 mm, resulting in localized perforation occurring on average every 2-3 maintenance cycles.

[0003] However, waste contact tanks are classified as pressure vessels (special equipment). Damage to special equipment requires outsourcing to qualified external contractors for repairs. Repair and inspection reporting require significant time and costs, and the inability to keep the equipment on standby will also affect normal production. Summary of the Invention

[0004] To address the problems and shortcomings of the existing technology, this utility model proposes a erosion-resistant structure for a waste contact tank and a waste contact tank containing the structure. The inner wall of the waste contact tank at the silicon powder inlet is provided with a wear-resistant structure to resist the erosion of the silicon powder fluid. The erosion force originally acting on the inner wall of the tank is transferred to the wear-resistant structure, thereby improving the erosion and wear resistance of the inner wall of the waste contact tank at the silicon powder inlet and extending the service life of the entire waste contact tank.

[0005] To achieve the above-mentioned objectives, the technical solution of this utility model is as follows:

[0006] This utility model proposes a erosion-resistant structure for a waste catalyst tank. The erosion-resistant structure is located on the inner wall of the tank at the silicon powder inlet of the waste catalyst tank. It includes a wear-resistant sheet assembly fixedly installed on the inner wall of the waste catalyst tank to prevent silicon powder fluid from eroding the inner wall of the tank. The upper and lower ends of the wear-resistant sheet assembly are respectively provided with clamping and fixing blocks. The two clamping and fixing blocks are respectively fixedly connected to the inner wall of the waste catalyst tank, and the upper and lower ends of the wear-resistant sheet assembly abut against the two clamping and fixing blocks.

[0007] Preferably, the clamping and fixing block is an L-shaped fixing frame, and the upper and lower ends of the wear-resistant plate assembly abut against the inner corners of the two L-shaped fixing frames respectively.

[0008] Preferably, ceramic adhesive is provided between the wear-resistant plate assembly and the inner wall of the tank.

[0009] Preferably, the wear-resistant sheet assembly is composed of multiple wear-resistant sheets arranged sequentially along the fluid scouring direction at the silicon powder inlet.

[0010] Preferably, the wear-resistant sheet closest to the silicon powder inlet of the waste contact tank has a bevel.

[0011] Preferably, the inclination angle of the inclined plane is 30-45°.

[0012] Preferably, the clamping and fixing block is welded and fixed to the inner wall of the waste contact tank.

[0013] Preferably, the wear-resistant sheet is a silicon carbide sheet.

[0014] Preferably, the wear-resistant sheet is a silicon nitride wear-resistant sheet.

[0015] Based on the same inventive concept, this utility model also proposes a waste contact tank, which includes the erosion-resistant structure of the waste contact tank described above.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model incorporates a wear-resistant and erosion-resistant inner lining structure at the silicon powder inlet of the waste catalyst tank. The wear-resistant plates within this lining structure are extremely difficult for silicon powder to wear down, resulting in better overall wear resistance. This transfers the erosive force of the silicon powder fluid, which would normally act directly on the inner wall of the tank, to the wear-resistant plate assembly, thereby protecting the inner wall from erosion and wear. Therefore, it significantly improves the erosion and wear resistance of the inner wall at the silicon powder inlet of the waste catalyst tank, thus extending the overall service life of the waste catalyst tank. Furthermore, it reduces equipment maintenance costs and downtime for repairs, and avoids safety accidents caused by leaks of high-risk media.

[0018] 2. In this invention, a ceramic adhesive is provided between the wear-resistant sheet and the inner wall of the tank. The ceramic adhesive can adhere the wear-resistant sheet to the inner wall of the tank, so even if the wear-resistant sheet breaks, it will not fall off in one piece and into the waste material tank, blocking the bottom outlet. Furthermore, the ceramic adhesive also has good buffering and shock absorption properties. When the silica powder fluid exerts a scouring force on the wear-resistant sheet, the ceramic adhesive can effectively absorb and buffer this impact energy, reducing the direct impact of the scouring force on the wear-resistant sheet and the inner wall of the tank, thereby extending the service life of the wear-resistant sheet and the tank, and improving the stability and reliability of the equipment operation.

[0019] 3. This utility model features L-shaped fixing brackets fixedly installed at both the upper and lower ends of the wear-resistant sheet. The concave corner structures of the two L-shaped fixing brackets directly engage with the upper and lower ends of the wear-resistant sheet. Specifically, the opposing right-angled sides of the two L-shaped fixing brackets support and clamp the wear-resistant sheet, while the other two right-angled sides act as a barrier to prevent the wear-resistant sheet from shifting. Therefore, even if the ceramic adhesive melts at high temperatures, the wear-resistant sheet will not fall into the waste contact tank, effectively avoiding the problem of blockage at the bottom outlet caused by the wear-resistant sheet falling off, and ensuring the normal operation of the equipment.

[0020] 4. The wear-resistant sheet closest to the silicon powder inlet of this utility model has an inclined surface, which faces the silicon powder inlet. The inclined surface facilitates the transition of the discharged solid silicon powder and avoids the formation of a step between the wear-resistant sheet and the inner wall of the waste contact tank, which would cause point-to-point erosion of the inner wall of the tank at the step and thus quickly damage the waste contact tank. Attached Figure Description

[0021] The foregoing and hereinafter detailed description of this utility model becomes clearer when read in conjunction with the following drawings, in which:

[0022] Figure 1 This is a top view of the waste contact tank of this utility model;

[0023] Figure 2 This is a front view of the erosion-resistant structure of this utility model;

[0024] Figure 3 This is a side view of the erosion-resistant structure of this utility model;

[0025] Figure 4 This is a top view of the erosion-resistant structure of this utility model.

[0026] In the picture:

[0027] 1. Wear-resistant plate assembly; 2. Clamping and fixing block; 3. Ceramic adhesive; 4. Inner wall of the tank; 101. Wear-resistant plate; N1. Silica powder inlet. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this utility model, the following will further illustrate the technical solutions for achieving the purpose of this utility model through several specific embodiments. It should be noted that the technical solutions claimed by this utility model include, but are not limited to, the following embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this utility model.

[0029] Example 1

[0030] This embodiment discloses a erosion-resistant structure for waste contact tanks. First, as follows: Figure 1As shown, the silicon powder inlet of the waste catalyst tank is located on one side of the tank body, and its direction is along the tangent of the tank body's circumference. Therefore, when silicon powder is unloaded into the waste catalyst tank during hydrogenation furnace maintenance, the waste silicon powder fluid enters the waste catalyst tank through the silicon powder inlet. The silicon powder fluid flows horizontally and at high speed along the tangent of the inlet, scouring the inner wall of the tank body for approximately 600mm of arc length at the silicon powder inlet. This location becomes a weak point in the waste catalyst tank.

[0031] Based on this, in this embodiment, an erosion-resistant structure is provided on the inner wall of the waste catalyst tank at the silicon powder inlet N1, such as... Figure 2 As shown, the erosion-resistant structure includes a wear-resistant sheet assembly 1 fixed to the inner wall 4 of the waste contact tank to prevent silicon powder fluid from eroding the inner wall 4 of the tank, and a clamping and fixing block 2 for clamping and fixing the wear-resistant sheet assembly 1. There are two clamping and fixing blocks 2, which are located at the upper and lower ends of the wear-resistant sheet assembly 1, respectively. The two clamping and fixing blocks 2 are fixedly connected to the inner wall 4 of the waste contact tank by welding. The two clamping and fixing blocks 2 are curved clamping structures, with the curved side connected to the inner wall 4 of the waste contact tank, and the curvature of the two is matched. The upper and lower ends of the wear-resistant sheet assembly 1 abut against the upper and lower clamping and fixing blocks 2, respectively.

[0032] In the embodiment described in this utility model, firstly, one of the clamping and fixing blocks 2 is fixedly installed on the inner wall 4 of the silicon powder inlet of the waste catalyst tank by welding or other means. Then, the wear-resistant assembly 1 is installed on the inner wall 4 of the tank and its bottom abuts against the fixed clamping and fixing block 2. Next, another clamping and fixing block 2 is installed above the wear-resistant assembly 1 and pressed against the top of the wear-resistant assembly 1. Finally, the top clamping and fixing block 2 is connected to the inner wall 4 of the tank by welding, thus achieving the clamping and fixing of the wear-resistant assembly 1 in the waste catalyst tank.

[0033] Preferably, the wear-resistant plate assembly 1 is composed of multiple wear-resistant plates 101 arranged sequentially along the fluid scouring direction at the silicon powder inlet. Furthermore, it is understood that the wear-resistant plates 101 are typically any one of silicon carbide plates, silicon nitride wear-resistant plates, alumina wear-resistant plates, or titanium carbonitride wear-resistant plates.

[0034] Furthermore, although the wear-resistant plate 101 has high wear resistance, the high-speed impact of the fluid flowing into it from the silicon powder inlet N1 can cause significant impact force, leading to localized cracking and breakage. Once the wear-resistant plate 101 breaks, fragments are highly likely to detach and fall into the waste catalyst tank, clogging the bottom outlet. Therefore, to minimize the risk of the wear-resistant plate 101 breaking and falling into the waste catalyst tank, such as... Figure 3As shown, a ceramic adhesive 3 is provided between the wear-resistant sheet 101 and the inner wall 4 of the tank. The ceramic adhesive 3 can not only stick and fix the wear-resistant sheet 101 to the inner wall 4 of the tank, so that even if the wear-resistant sheet 101 breaks, it will not fall off in one piece and fall into the waste contact tank to block the bottom outlet; in addition, the ceramic adhesive 3 also has good buffering and shock absorption performance. When the silica powder fluid generates a scouring force on the wear-resistant sheet, the ceramic adhesive 3 can effectively absorb and buffer this impact energy, reducing the direct impact of the scouring force on the wear-resistant sheet and the inner wall 4 of the tank.

[0035] When the silicon powder fluid is discharged into the waste contact tank from the silicon powder inlet N1, the high-speed impact of the fluid first acts on the wear-resistant sheet assembly 1. The wear-resistant sheet assembly 1, with its high wear resistance, resists the erosion and wear of the silicon powder fluid, protecting the inner wall 4 of the tank. The ceramic adhesive 3 and the L-shaped clamping block 2 work together to ensure that the wear-resistant sheet assembly 1 remains stable during the erosion process, preventing it from falling off or shifting due to impact or melting of the ceramic adhesive 3.

[0036] Example 2

[0037] This embodiment discloses a erosion-resistant structure for a waste contact tank, as shown in the attached description. Figure 2 As shown, based on Embodiment 1, in order to enhance the fixing and clamping effect on the wear-resistant sheet assembly 1 and prevent the wear-resistant sheets from falling off, the clamping and fixing block 2 is an L-shaped fixing frame.

[0038] Furthermore, during fixed installation, the internal corner structure of the L-shaped fixing frame engages with the end of the wear-resistant plate assembly 1, meaning that the upper and lower ends of the wear-resistant plate assembly 1 respectively abut against the internal corner positions of the two L-shaped fixing frames. Specifically, the two right-angled sides of the two L-shaped fixing frames support and clamp the upper and lower ends of the wear-resistant plate 101, while the remaining two right-angled sides press and block the wear-resistant plate assembly 1 from the side. This not only prevents the wear-resistant plate from shifting, but even if the ceramic adhesive melts in a high-temperature environment, the right-angled sides of the L-shaped fixing frames on the side of the wear-resistant plate will hold it in place, effectively preventing it from falling off and causing blockage of the bottom discharge port, thus ensuring the normal operation of the equipment.

[0039] Furthermore, such as Figure 4 As shown, the wear-resistant sheet 101 closest to the silicon powder inlet N1 of the waste contact tank has a slope, the slope angle of which is 30-45°, preferably 45°. Furthermore, this slope faces the silicon powder inlet N1 of the waste contact tank.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0041] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A erosion-resistant structure for waste contact tanks, characterized in that, The erosion-resistant structure is located on the inner wall (4) of the waste anode tank at the silicon powder inlet (N1) of the waste anode tank, and comprises a wear-resistant sheet assembly (1) fixedly installed on the inner wall (4) of the waste anode tank for blocking the fluid erosion of the silicon powder to the inner wall (4) of the waste anode tank, and the upper and lower ends of the wear-resistant sheet assembly (1) are respectively provided with clamping fixing blocks (2), the two clamping fixing blocks (2) are respectively fixedly connected with the inner wall (4) of the waste anode tank, and the upper and lower ends of the wear-resistant sheet assembly (1) are respectively abutted on the two clamping fixing blocks (2).

2. The scouring-resistant structure for a waste contact tank according to claim 1, wherein The clamping fixing block (2) is an L-shaped fixing frame, and the upper and lower ends of the wear-resistant sheet assembly (1) are respectively abutted at the inside corner positions of the two L-shaped fixing frames.

3. The scouring-resistant structure for a waste contact tank according to claim 1, wherein The ceramic glue (3) is arranged between the wear-resistant sheet assembly (1) and the inner wall (4) of the tank.

4. The scouring-resistant structure for a waste contact tank according to claim 1, wherein The wear-resistant sheet assembly (1) is composed of a plurality of wear-resistant sheets (101) arranged in sequence along the fluid erosion direction at the silicon powder inlet.

5. The scouring-resistant structure for a waste contact tank according to claim 4, wherein The wear-resistant sheet (101) closest to the silicon powder inlet (N1) of the waste anode tank has an inclined surface.

6. The scouring-resistant structure for a waste contact tank according to claim 5, wherein The inclination angle of the inclined surface is 30-45°.

7. The scouring-resistant structure for a waste contact tank according to claim 1, wherein The clamping fixing block (2) is welded and fixed on the inner wall (4) of the waste anode tank.

8. The scouring-resistant structure for a waste contact tank according to claim 1, wherein The wear-resistant sheet (101) is a silicon carbide sheet.

9. The scouring-resistant structure for a waste contact tank according to claim 1, wherein The wear-resistant sheet (101) is a silicon nitride wear-resistant sheet.

10. A waste contact body tank characterized by, The waste anode tank comprises the erosion-resistant structure of any one of claims 1-9.

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