Titanium tetrachloride gas phase oxidation reaction cooling section

Abstract

The invention discloses a titanium tetrachloride gas phase oxidation reaction cooling section which comprises a shell, an inlet flange and an outlet flange are arranged at the two ends of the shell respectively, an inner pipe is arranged in the shell, a sealed cooling water jacket is formed between the shell and the inner pipe, and a water inlet pipe and a water outlet pipe are further arranged on the outer jacket. A non-metal pipe is arranged on one side of the material outlet in the shell, the pipe diameter of the non-metal pipe is gradually increased towards the direction of the material outlet, knotting materials are filled among the non-metal pipe, the outlet flange and the shell, and the non-metal pipe and the inner pipe are coaxially arranged. The non-metal pipe, the shell and the outlet flange are combined together at the material inlet through the knotting material, part of an Inconel alloy material is replaced with the non-metal pipe, the complex structure of the Inconel alloy material is reduced, meanwhile, blocking caused by scabbing of the material outlet is effectively avoided, it is guaranteed that the generated material is rapidly cooled, and the service life of the material outlet is prolonged. And the titanium dioxide product quality is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of titanium dioxide production by chloride process, and in particular to a cooling section for titanium tetrachloride gas phase oxidation reaction. Background Art

[0002] The titanium tetrachloride gas phase oxidation reactor is a device for producing titanium dioxide in the chloride process of titanium dioxide production. High-temperature oxygen and high-temperature titanium tetrachloride gas enter the titanium tetrachloride gas phase oxidation reactor through different paths. When the two media are evenly mixed, the titanium tetrachloride gas phase oxidation reaction is quickly completed to generate titanium dioxide and chlorine. The cooling section of the titanium tetrachloride oxidation reaction is made of Inconel material. Titanium dioxide materials are easy to adhere to the metal equipment wall, blocking the product outlet, shortening the equipment operation cycle and affecting the smooth process production. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a cooling section for titanium tetrachloride gas phase oxidation reaction, which solves the problem that metal equipment walls are prone to adhesion and scarring, blocking material outlets, and ensures continuous and smooth operation of the production device.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a titanium tetrachloride gas phase oxidation reaction cooling section, comprising an outer shell, an inlet flange and an outlet flange are respectively arranged at both ends of the outer shell, an inner tube is arranged in the outer shell, a sealed cooling water jacket is formed between the outer shell and the inner tube, and an inlet pipe and an outlet pipe are also arranged on the outer sleeve, a non-metallic tube is arranged on one side of the material outlet in the outer shell, the diameter of the non-metallic tube gradually increases toward the material outlet direction, knotting material is filled between the non-metallic tube, the outlet flange and the outer shell, and the non-metallic tube is coaxially arranged with the inner tube.

[0005] The non-metallic tube is made of mullite.

[0006] The length of the non-metallic tube is 300 mm to 700 mm.

[0007] The diameter of the inner tube gradually increases from the material inlet toward the material outlet.

[0008] One end of the inner tube close to the inlet flange is connected to a scar remover pipeline, and the scar remover pipeline passes through the outer shell.

[0009] A spiral partition is arranged in the cooling water jacket.

[0010] Beneficial effects of the present invention: Compared with the prior art, the present invention combines the non-metallic tube with the outer shell and the outlet flange by knotting material at the material inlet, and replaces the Inconel alloy material at the outlet end with the non-metallic tube, thereby reducing the complex structure of the Inconel alloy material, and effectively improving the corrosion resistance and anti-scarring performance of the equipment, avoiding blockage of the material outlet, ensuring rapid cooling of the generated material, and ensuring the quality of the titanium dioxide product. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 It is a structural schematic diagram of the present invention; In the figure: 1. outer shell; 2. inlet flange; 3. outlet flange; 4. inner pipe; 5. cooling water jacket; 6. water inlet pipe; 7. water outlet pipe; 8. non-metallic pipe; 9. knotting material; 10. scar remover pipeline; 11. spiral partition. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0013] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments. Example

[0014] like Figure 1 As shown, the present invention provides a titanium tetrachloride gas phase oxidation reaction cooling section, comprising an outer shell 1, an inlet flange 2 and an outlet flange 3 are respectively arranged at both ends of the outer shell 1, an inner tube 4 is arranged in the outer shell 1, a sealed cooling water jacket 5 is formed between the outer shell 1 and the inner tube 4, and an inlet pipe 6 and an outlet pipe 7 are also arranged on the outer shell 1, a non-metallic tube 8 is arranged on one side of the material outlet in the outer shell 1, the diameter of the non-metallic tube 8 gradually increases toward the material outlet direction, a knotting material 9 is filled between the non-metallic tube 8 and the outlet flange 2 and the outer shell 1, and the non-metallic tube 8 is coaxially arranged with the inner tube 4; the non-metallic tube 8 is made of mullite, and the length of the non-metallic tube 8 is 300mm to 700mm.

[0015] By using knotting material 9 to combine the non-metallic tube 8 with the outer shell 1 and the outlet flange 3 at the material inlet, the non-metallic tube 8 replaces part of the Inconel alloy material to reduce the complex structure of the Inconel alloy material. At the same time, since the adhesion between the titanium dioxide material and the non-metallic material is reduced, the material outlet can be effectively prevented from being blocked by scarring, thereby ensuring rapid cooling of the generated material and ensuring the quality of the titanium dioxide product.

[0016] Furthermore, in order to increase the cooling effect, the diameter of the inner tube 4 gradually increases from the material inlet toward the material outlet.

[0017] Further, the inner tube 4 is connected to a scar remover pipe 10 at one end close to the inlet flange 2, and the scar remover pipe 10 passes through the outer shell 1. The scar remover pipe 10 is provided to introduce the scar remover, so as to better solve the problem of easy adhesion and scar formation on the wall of metal equipment.

[0018] Furthermore, a spiral baffle 11 is provided in the cooling water jacket 5. The spiral baffle 11 is used to guide the water flow and improve the cooling effect.

[0019] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A cooling section for titanium tetrachloride gas phase oxidation reaction, characterized in that: The invention comprises an outer shell (1), wherein an inlet flange (2) and an outlet flange (3) are respectively arranged at both ends of the outer shell (1), an inner tube (4) is arranged inside the outer shell (1), a sealed cooling water jacket (5) is formed between the outer shell (1) and the inner tube (4), an inlet pipe (6) and an outlet pipe (7) are also arranged on the outer shell (1), a non-metallic tube (8) is arranged on one side of the material outlet in the outer shell (1), the diameter of the non-metallic tube (8) gradually increases towards the material outlet direction, a knotting material (9) is filled between the non-metallic tube (8) and the outlet flange (2) and the outer shell (1), and the non-metallic tube (8) is coaxially arranged with the inner tube (4).

2. A titanium tetrachloride gas phase oxidation reaction cooling section according to claim 1, characterized in that: The non-metallic tube (8) is made of mullite.

3. The titanium tetrachloride gas phase oxidation reaction cooling section according to claim 1, characterized in that: The length of the non-metallic tube (8) is 300 mm to 700 mm.

4. The titanium tetrachloride gas phase oxidation reaction cooling section according to claim 1, characterized in that: The diameter of the inner tube (4) gradually increases from the material inlet toward the material outlet.

5. The titanium tetrachloride gas phase oxidation reaction cooling section according to claim 1, characterized in that: One end of the inner tube (4) close to the inlet flange (2) is connected to a scar remover pipe (10), and the scar remover pipe (10) passes through the outer shell (1).

6. The titanium tetrachloride gas phase oxidation reaction cooling section according to claim 1, characterized in that: A spiral partition plate (11) is provided in the cooling water jacket (5).

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