Cooling conduit reducer

Abstract

The utility model relates to the technical field of titanium dioxide production, in particular to a cooling conduit reducer which comprises a shell, two sides of the shell are respectively matched with cooling conduits connected with two sides of the reducer, a wear-resistant layer is arranged on the inner side of the shell and comprises a ceramic layer and a metal coating, the ceramic layer is arranged on the inner wall of the shell, and the metal coating is arranged on the outer wall of the shell. The metal coating is arranged on the inner wall of the ceramic layer. The wear-resistant layer is arranged on the inner side of the shell of the cooling conduit reducer, so that the wear resistance and the corrosion resistance of the reducer are effectively improved, the service life of the reducer is greatly prolonged, and the technical problems of high repair cost and poor heat-conducting property of the cooling conduit reducer in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium dioxide production, in particular to a wear-resistant titanium dioxide cooling conduit reducer and reducer. Background Art

[0002] Rutile titanium dioxide obtained by the chlorination process is an important inorganic chemical pigment. In the process of producing titanium dioxide by the chlorination process, the oxidation process is one of the core processes of the chlorination process. The main function of this process is to react titanium tetrachloride and oxygen under certain conditions to generate a gas-solid mixture of titanium dioxide and chlorine, which is then rapidly cooled in a cooling duct and transported to a bag filter for gas-solid separation and dechlorination. The high-speed rotating small particles of titanium dioxide and the substances used for scar removal will rub against the inner wall, reducer and elbow of the cooling duct, resulting in a reduction in the service life of the entire cooling duct. In the prior art, the damaged part of the cooling duct is usually directly processed and repaired, but the entire repair process is difficult and time-consuming, which will greatly reduce production efficiency.

[0003] The utility model patent with the publication number CN207777800U in the prior art discloses a cooling pipe structure that prevents wear and rupture during the production of titanium dioxide, including a material pipe and a cooling water pipe that is coaxial with the material pipe and is sleeved on the outside of the material pipe and closed at both ends. The cooling water pipe is connected to a cooling water circulation mechanism. The inner surface of the material pipe is provided with a wear-resistant layer, and the wear-resistant layer is composed of a metal lining, a filling layer, a ceramic layer and a ceramic glaze layer from the outside to the inside. The material pipe is provided with a cooling water storage pipe that is closed at both ends and connected to the cooling water pipe through a connecting pipe. The wear-resistant layer in the above technical solution is provided with a filling layer and a ceramic glaze layer. Although the wear resistance of the large and small heads is guaranteed to a certain extent, its thermal conductivity will be reduced, resulting in an increased probability of damage in a high-temperature environment. Utility Model Content

[0004] In order to mainly solve the technical problems of high repair cost and poor thermal conductivity of cooling conduit reducers in the prior art of producing titanium dioxide by the chloride method, the utility model proposes a cooling conduit reducer.

[0005] The cooling duct reducer and reducer include a shell, and the two sides of the shell are matched with the cooling ducts connected to the two sides of the reducer and reducer respectively. A wear-resistant layer is provided on the inner side of the shell, and the wear-resistant layer includes a ceramic layer and a metal coating. The ceramic layer is provided on the inner wall of the shell, and the metal coating is provided on the inner wall of the ceramic layer.

[0006] The above-mentioned cooling duct large and small heads have side walls that are bent and bulged outward to form mounting grooves on the inner walls. The wear-resistant layer is installed in the mounting groove so that the surface of the wear-resistant layer and the inner walls of the cooling ducts on both sides of the large and small heads form a smooth connecting pipe. The back plate also includes a through hole in the center of the back plate, which is installed on one side of the large head of the shell, and the through hole has the same inner diameter as the cooling duct on the side of the large head of the shell.

[0007] The beneficial effects of the utility model include: by arranging a wear-resistant layer on the inner side of the shell of the cooling duct reducer and reducer, the wear resistance and corrosion resistance of the reducer and reducer are effectively increased, the service life of the reducer and reducer is greatly extended, and the technical problems of high repair cost and poor thermal conductivity of the cooling duct reducer and reducer in the prior art are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a structural diagram of embodiment 1 of the cooling duct reducer and reducer of the utility model.

[0009] Figure 2 This is a schematic structural diagram of Example 2 of the cooling duct reducer and reducer of the utility model.

[0010] Figure 3 This is a front view of the cooling duct reducer and reducer back plate unit of the present invention.

[0011] Figure 4 This is a side view of the cooling duct reducer and reducer back plate unit of the utility model.

[0012] Markings in the figure are: 1-shell, 2-wear-resistant layer, 21-ceramic layer, 22-metal coating, 3-wear-resistant back plate, 31-back plate unit. DETAILED DESCRIPTION

[0013] The present invention will be described below with reference to the accompanying drawings.

[0014] Example 1:

[0015] like Figure 1-3 As shown, the cooling duct reducer and reducer described in the utility model include a shell 1. In this embodiment, the cross-section of the shell 1 is circular and is made of nickel or its alloy. The two sides of the shell 1 are respectively matched with the cooling ducts connected to the two sides of the reducer and reducer. A wear-resistant layer 2 is provided on the inner side of the shell 1, wherein the wear-resistant layer 2 includes a ceramic layer 21 and a metal coating 22. The ceramic layer 21 is provided on the inner wall of the shell 1, and the metal coating 22 is provided on the inner wall of the ceramic layer 21. The metal coating 22 is provided on the inner wall of the ceramic layer 21. The metal coating 22 in this embodiment adopts chromium carbide or tungsten carbide coating, which improves the wear resistance while ensuring good thermal conductivity and improving the service life of the cooling duct reducer and reducer.

[0016] When this embodiment is put into use, a ceramic layer 21 is first plated inside the shell 1, and then a metal coating 22 is sprayed on the ceramic layer 21. During use, when the titanium oxide particles and the scar removal substance collide and rub against the cooling duct reducer and reducer, the wear-resistant layer 2 composed of the ceramic layer 21 and the metal plating 22 can replace the shell 1 to rub and collide with substances such as titanium oxide particles, thereby greatly reducing the wear of the cooling duct reducer and reducer, thereby extending the service life of the cooling duct reducer and reducer.

[0017] Example 2:

[0018] On the basis of the large and small heads of the cooling duct described in Example 1, the side walls of the shell 1 are bent and bulged outward to form an installation groove 11 on the inner wall, and the wear-resistant layer 2 is installed in the installation groove 11, so that the surface of the wear-resistant layer 2 and the inner side of the cooling duct on both sides of the large and small heads together form a smooth inner wall of the cooling duct, reducing the contact area between the titanium oxide particles and the scar removal substance when they produce friction with the wear-resistant layer, thereby reducing the wear rate of the wear-resistant layer, and also includes a back plate 3, wherein a through hole 31 is provided in the center of the back plate 3, and is installed on the large head side of the shell 1, and the through hole 31 is the same as the inner diameter of the cooling pipe on the large head side of the shell 1, and the side wall on the small head side is pre-bent inward to form a connecting hole with the same inner diameter as the cooling pipe on the small head side.

[0019] The cooling duct reducer and reducer described in this embodiment forms a smooth pipe passage with the inner walls of the pipes on both sides of the reducer and reducer by installing the wear-resistant layer 2 in the installation groove 11, thereby effectively reducing the wear caused by the friction between the titanium oxide particles and the scar removal substance and the cooling duct reducer and reducer.

[0020] Compared with the existing technology, the cooling duct reducer and reducer proposed in the present invention has the following advantages: by providing a wear-resistant layer on the inner wall of the shell of the cooling duct reducer and reducer, the wear resistance and corrosion resistance of the cooling duct reducer and reducer are improved, solving the technical problems of high repair cost and poor thermal conductivity of the cooling duct in the existing technology.

Claims

1. A cooling duct reducer and reducer, comprising a housing (1), wherein both sides of the housing (1) are matched with cooling ducts connected to both sides of the reducer and reducer, and a wear-resistant layer (2) is provided on the inner side of the housing (1), characterized in that: The wear-resistant layer (2) comprises a ceramic layer (21) and a metal coating (22); the ceramic layer (21) is arranged on the inner wall of the shell (1); and the metal coating (22) is arranged on the inner wall of the ceramic layer (21).

2. The cooling duct reducer according to claim 1, characterized in that: The side wall of the shell (1) is bent and bulged outward to form a mounting groove (11) on the inner wall. The wear-resistant layer (2) is installed in the mounting groove (11), so that the surface of the wear-resistant layer (2) and the inner sides of the cooling ducts on both sides of the large and small heads together form a smooth inner wall of the cooling duct. The shell (1) also includes a back plate (3). A through hole (31) is provided in the center of the back plate (3) and is installed on the large head side of the shell (1). The through hole (31) has the same inner diameter as the cooling duct on the large head side of the shell (1).

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