Distillation device for producing sponge titanium

Abstract

The utility model discloses a distillation device for producing sponge titanium, which comprises a distillation tower and a cold-end reactor which are communicated through an expansion pipeline, and the cold-end reactor is provided with a vacuum pipe communicated with vacuum equipment. The expansion pipeline is composed of a compensation pipe and an end pipe, the two ends of the end pipe are rotationally connected with top covers of the distillation tower and the cold-end reactor respectively, the middle of the compensation pipe is rotationally connected with a rotating shaft seat on the stabilizing frame through a fixing ring, and displacement generated by thermal expansion can be effectively absorbed. Corrugated pipes are arranged at the two ends of the compensation pipe, and an Al2O3-ZrO2 composite coating is sprayed on the outer layer The compensation pipe is connected with the end pipe through the hinging mechanism, the NiTiNb memory alloy ring is embedded in the flange connecting position, and the gland, the pressing ring and the spring are matched, so that the sealing performance is enhanced, and the operation stability and reliability of the distillation device are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of sponge titanium production equipment, and in particular to a distillation apparatus for producing sponge titanium. Background Technology

[0002] Distillation in the production of sponge titanium involves removing impurities from crude titanium at a high temperature of 650-900℃ to obtain high-purity sponge titanium. The distillation unit, as the core equipment, mainly consists of components such as a distillation column, a passage pipe, and a cold-end reactor. The passage pipe is responsible for connecting different areas of the distillation column to ensure the smooth flow of materials and steam.

[0003] Traditional distillation equipment typically employs rigid connection structures for its piping. Under the high-temperature environment of titanium sponge distillation, this piping undergoes significant thermal expansion, with axial expansion reaching 15mm or even greater. Because rigid connections cannot effectively accommodate this thermal expansion, stress concentration occurs at the flange connections. Prolonged exposure to this stress concentration can cause the gaskets to carbonize due to the high temperature and stress, leading to decreased sealing performance and leaks. This not only affects the quality and efficiency of titanium sponge production and increases costs but may also cause environmental pollution and safety hazards.

[0004] Therefore, it is of great significance to develop distillation equipment that can solve the problem of thermal expansion. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a distillation apparatus for producing sponge titanium, thereby solving the problems mentioned in the background art.

[0006] To achieve the above technical objectives, the present invention provides a distillation apparatus for producing sponge titanium, comprising: a distillation column and a cold-end reactor, wherein the distillation column and the cold-end reactor are connected by an expansion pipe, the cold-end reactor is provided with a vacuum tube connected to a vacuum device, the expansion pipe includes a compensation pipe and end pipes at both ends thereof, both the distillation column and the cold-end reactor are provided with a top cover, one end of the end pipe is rotatably connected to the top cover, and the other end is connected to the compensation pipe, both ends of the compensation pipe are provided with corrugated pipes, one end of the corrugated pipe is connected to the compensation pipe, and the other end is provided with a pipe end flange connected to the end pipe, the compensation pipe and the pipe end flange are connected by a hinge mechanism.

[0007] Furthermore, the end pipe includes a bend and a swivel pipe. One end of the bend is connected to a pipe end flange, and the other end is provided with a limit ring. A positioning ring is provided inside the swivel pipe. The lower end of the swivel pipe is connected to a top cover, and the upper end is provided with a pressure cap. The pressure cap restricts the limit ring to the positioning ring.

[0008] Furthermore, a wear-resistant sealing ring is provided between the limiting ring and the positioning ring, and two pressure rings are provided between the pressure cap and the limiting ring. A spring is provided between the two pressure rings, and the spring is kept in a compressed state.

[0009] Furthermore, a stabilizing frame is provided between the distillation column and the cold-end reactor, and a rotating shaft seat is provided on the stabilizing frame. A fixing ring is provided in the middle of the compensation pipe, and the fixing ring is rotatably connected to the rotating shaft seat. The hinge mechanism includes two connecting pieces, one end of which is connected to the compensation pipe and the pipe end flange respectively, and the other end is hinged together.

[0010] Furthermore, the outer layer of the bellows is coated with an Al2O3-ZrO2 composite coating, and a NiTiNb shape memory alloy ring is embedded at the flange connection between the compensation pipe, the end pipe, and the top cover.

[0011] Compared with the prior art, the beneficial effects of this utility model include:

[0012] 1. This utility model, through the combination of a compensating pipe, an end pipe, a stabilizing frame, and a rotating shaft seat, allows the end pipe to swing freely and the compensating pipe to rotate around the rotating shaft seat when the pipeline shifts due to thermal expansion in high-temperature environments. This effectively absorbs and compensates for axial deformation, thus solving the problems of stress concentration and sealing failure caused by thermal expansion in traditional pipelines. It ensures the continuous and stable operation of the distillation unit under high-temperature conditions. Simultaneously, the Al2O3-ZrO2 composite coating on the outer layer of the corrugated pipe further enhances the pipeline's high-temperature resistance and oxidation resistance, extending its service life and providing a reliable guarantee for the stable production of sponge titanium.

[0013] 2. This utility model incorporates a NiTiNb shape memory alloy ring embedded at the flange connection between the compensating pipe, end pipe, and top cover. This alloy ring automatically adjusts the sealing pressure according to temperature changes, ensuring good sealing performance even in high-temperature environments. Furthermore, the wear-resistant sealing ring between the limiting ring and the positioning ring, along with the combined design of the gland, pressure ring, and spring, forms multiple sealing defenses, further enhancing sealing performance and preventing material leakage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a distillation apparatus for producing sponge titanium provided by this utility model;

[0015] Figure 2 This is an enlarged view at point A of a schematic diagram of a distillation apparatus for producing sponge titanium provided by this utility model;

[0016] Figure 3 This utility model provides a cross-sectional view of the end tube of a distillation apparatus for producing sponge titanium.

[0017] In the picture: Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] Reference Figure 1 This utility model provides a distillation apparatus for producing sponge titanium, including a distillation column 1 and a cold-end reactor 2. The cold-end reactor 2 is provided with a vacuum tube 201 connected to a vacuum device to maintain a vacuum environment during the distillation process.

[0020] Distillation column 1 and cold-end reactor 2 are connected by compensating pipe 5 and end pipe 4. Two end pipes 4 are installed at opposite ends of the compensating pipe 5. One end of the end pipe 4 is rotatably connected to the top cover 3 on both the distillation column 1 and the cold-end reactor 2, allowing the end pipe 4 to swing freely to some extent to accommodate displacement changes caused by thermal expansion. The other end of the end pipe 4 is tightly connected to the compensating pipe 5. A stabilizing frame 6 is also installed between the distillation column 1 and the cold-end reactor 2. The stabilizing frame 6 has a rotating shaft seat 601. A fixing ring 7 is located in the middle of the compensating pipe 5, rotatably connected to the rotating shaft seat 601. The fixing ring 7 not only supports the compensating pipe 5, but also, when the end pipe 4 changes length due to thermal expansion, pushes the compensating pipe 5 to rotate around the rotating shaft seat 601. Simultaneously, the connection end of the end pipe 4 to the top cover 3 rotates, thereby compensating for its axial deformation.

[0021] Reference Figure 2 The expansion pipe 5 is equipped with corrugated pipes 502 at both ends. The corrugated pipes 502 have good extensibility and can effectively absorb the displacement caused by thermal expansion. The outer layer of the corrugated pipes 502 is coated with an Al2O3-ZrO2 composite coating, which has good high temperature resistance and oxidation resistance, and can extend the service life of the corrugated pipes. One end of the corrugated pipe 502 is directly connected to the expansion pipe 5, and the other end is connected to the end pipe 4 through the pipe end flange 501. Both the expansion pipe 5 and the pipe end flange 501 are provided with connecting pieces 503. The two connecting pieces 503 are hinged together. This connection method not only ensures the firmness of the connection, but also allows the expansion pipe 5 to rotate freely in multiple directions, further enhancing the adaptability and flexibility of the expansion pipe.

[0022] Reference Figure 3The end pipe 4 includes a bend 401 and a turning pipe 402; one end of the bend 401 is connected to the pipe end flange 501, and the other end is provided with a limit ring 405. The lower end of the steering tube is connected to the top cover 3 via a flange; a pressure cap 404 is installed at the upper end; a NiTiNb shape memory alloy ring is also embedded at the flange connection between the compensation tube 5, the end tube 4 and the top cover 3, which automatically adjusts the sealing pressure through temperature sensitivity. The preload is 20kN at room temperature, and an additional 30kN of clamping force is generated when the temperature is high (>500℃) to maintain good sealing at each joint. A positioning ring 403 is provided inside the steering tube 402, and a limiting ring 405 is installed inside the steering tube 402, with a wear-resistant sealing ring 406 between it and the positioning ring 403. Two pressure rings 407 are also provided between the pressure cap 404 and the limiting ring 405. A spring 408 is installed between the two pressure rings 407 and is always kept in a compressed state to maintain good airtightness between the limiting ring 405, the wear-resistant sealing ring 406 and the positioning ring 403.

[0023] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A distillation apparatus for producing titanium sponge, comprising a distillation column and a cold-end reactor, the distillation column being in communication with the cold-end reactor through an expansion pipe, and the cold-end reactor being provided with a vacuum pipe in communication with a vacuum device, characterized in that: The expansion pipeline comprises a compensation pipe and end pipes arranged at both ends of the compensation pipe, the distillation column and the top of the cold-end reactor are provided with top covers, one end of the end pipe is rotationally connected with the top cover, the other end is communicated with the compensation pipe, both ends of the compensation pipe are provided with bellows, one end of the bellows is connected with the compensation pipe, the other end is provided with a pipe end flange connected with the end pipe, the compensation pipe and the pipe end flange are connected through a hinged mechanism.

2. The distillation apparatus for producing titanium sponge according to claim 1, characterized by: The end pipe comprises an elbow pipe and a turning pipe, one end of the elbow pipe is connected with the pipe end flange, the other end is provided with a limiting ring, the turning pipe is provided with a positioning ring, the lower end of the turning pipe is connected with the top cover, the upper end is provided with a gland, the limiting ring is limited on the positioning ring by the gland.

3. The distillation apparatus for producing titanium sponge according to claim 2, characterized by: A wear-resistant sealing ring is arranged between the limiting ring and the positioning ring, two pressing rings are arranged between the gland and the limiting ring, a spring is arranged between the two pressing rings, and the spring is kept in a compressed state.

4. A distillation apparatus for the production of titanium sponge according to claim 2 or 3, characterised in that: A stabilizing frame is arranged between the distillation column and the cold-end reactor, the stabilizing frame is provided with a rotating shaft seat, a fixing ring is arranged at the middle part of the compensation pipe, the fixing ring is rotationally connected with the rotating shaft seat, the hinged mechanism comprises two connecting sheets, one end of each of the two connecting sheets is connected with the compensation pipe and the pipe end flange respectively, and the other end is hinged.

5. The distillation apparatus for producing titanium sponge according to claim 4, characterized by: An Al2O3-ZrO2 composite coating is sprayed on the outer layer of the bellows, and a NiTiNb memory alloy ring is embedded at the flange connection between the compensation pipe, the end pipe and the top cover.

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