Improved reaction kettle for titanium dioxide production

Abstract

The utility model provides an improved reaction kettle for titanium dioxide production, and belongs to the technical field of titanium dioxide production. The reaction kettle comprises a sealing device, a kettle body, a stirring device, a heating device, a cooling device and a tail gas treatment device, the reaction kettle is of a split type, the jacket type heating device is wrapped outside the kettle body, the reaction kettle is heated through an electric heating wire in the jacket type heating device, and the tail gas treatment device is arranged in the kettle body. A coiled pipe type cooling device is arranged in the reaction kettle, circulating water is introduced into the coiled pipe type cooling device to cool reactants in the reaction kettle, meanwhile, the reaction kettle is stirred by a stirring device so as to promote the reaction process in the reaction kettle, and an anti-corrosion nickel alloy layer and an anti-corrosion titanium alloy layer are arranged in the reaction kettle, so that the corrosion resistance of the reaction kettle is improved. In the preparation process of titanium dioxide, when acid, alkali or corrosive organic matters are added, the reaction kettle is corroded to influence the service life of the reaction kettle.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium dioxide production, in particular to an improved reactor used for titanium dioxide production. Background Art

[0002] The production of titanium dioxide often involves the use of corrosive substances such as alkali, nitric acid, sulfuric acid, chlorides, and organic matter. Therefore, the production equipment must be corrosion-resistant. Furthermore, in industrial production, titanium dioxide is produced on a ton-scale, which can lead to problems such as uneven mixing and exothermic reactions during addition and reaction. Reactors are key pieces of equipment in the production of titanium dioxide, and therefore require corrosion resistance, high reaction efficiency, high safety, and environmental friendliness.

[0003] For example, patent CN211436165U discloses a novel magnetically driven reactor, comprising a jacketed head, a lower head, a coil, a jacketed reactor body, an inner reactor body, an ear support, an electrostatic grounding plate, a coil inlet, a connecting pipe, an equipment flange, a sampling port, a magnetic sealing drive structure, a drive motor, a thermometer port, a coupling, a transmission shaft, a coil outlet, a jacket inlet, an open-type turbine self-priming paddle, a discharge port, a jacket outlet, a vacuum port, a feed port, a pressure measuring port, a safety valve port, a remote pressure gauge port, a remote thermometer port, a balance tank port, a bursting disc port, an upper head and a hydrogen inlet. The utility model magnetically driven reactor is driven by magnetic force, has good sealing performance at the drive device, and is connected to each pipe port by a connecting flange, so that the torque that can be borne by the connection of each pipe port is large, and it is not easy to cause damage during use. The later maintenance cost is low, thereby reducing the production cost of the enterprise.

[0004] Patent CN116832758B discloses a magnetically sealed reactor, comprising a reactor body, a reactor cover, a drive mechanism, a magnetic coupler, a rotating shaft, and a stirring blade. The magnetic coupler is arranged on the outside of the output end of the drive mechanism, the rotating shaft is arranged at the lower end of the drive mechanism, the stirring blade is arranged below the outside of the rotating shaft, the reactor cover is arranged on the top of the reactor body, the drive mechanism is located above the outside of the reactor cover, a holder is connected to the upper inside of the reactor body through a support assembly, a drainage assembly is arranged on the inside of the holder, a ring frame is fixedly installed on the upper end surface of the holder, a ring pipe is arranged on the inside of the ring frame, and a blowing assembly is arranged at equal distances on the inside of the ring pipe along the annular direction. The inner sides of both ends of the ring pipe, the ring frame and the holder are connected to an air intake pump through corresponding air intake assemblies.

[0005] In summary, the traditional reactors for producing titanium dioxide have low reaction efficiency, low heat transfer efficiency, poor sealing, and are not corrosion-resistant, which affects the production efficiency and product quality of titanium dioxide. Although the reactors have been continuously improved, the reactors are not corrosion-resistant, the reaction efficiency still does not meet the requirements in large-scale production processes, and the sealing is poor, which are still problems that need to be solved urgently. Utility Model Content

[0006] In response to the above problems, the utility model provides an improved reactor for titanium dioxide production, which solves the problems of corrosion resistance, poor sealing, low heat transfer efficiency and low reaction efficiency of the reactor, recovers the heat of the reactor and improves the production efficiency and product quality of titanium dioxide.

[0007] The utility model provides an improved reactor for titanium dioxide production. The improved reactor comprises, from top to bottom, a sealing device, a reactor body, a stirring device, a heating device, a cooling device and an exhaust gas treatment device; the sealing device is a mechanical sealing device or a magnetic sealing device; a titanium alloy layer or a nickel alloy layer structure is provided on the inner wall of the reactor body; the stirring device comprises, from top to bottom, a motor, a reducer, a linkage, a transmission shaft, a fixed plate and a stirring paddle; the stirring paddle comprises a U-shaped stirring paddle and a paddle-type stirring paddle.

[0008] Furthermore, the sealing device is located directly above the kettle body and is coaxially arranged with the kettle body and the stirring device.

[0009] Furthermore, the kettle body is a split type, including a kettle body and a kettle cover, and the kettle body and the kettle cover are fixed by bolts to keep the kettle body sealed.

[0010] Furthermore, the kettle body and the kettle cover are both integrated.

[0011] Furthermore, the kettle body is cylindrical in shape, and the connections between the top and bottom of the kettle body and the side walls of the kettle body are rounded.

[0012] Furthermore, the titanium alloy layer or nickel alloy layer structure is in close contact with the inner wall of the kettle body, and the titanium alloy layer or nickel alloy layer structure is adhered to the inner wall of the kettle body by electroplating.

[0013] Furthermore, a sealing port, a feed port and an air release port are provided on the top of the kettle cover, and the sealing device is installed on the sealing port on the top of the kettle cover.

[0014] Furthermore, on the left and right sides of the inner wall of the kettle body, a 5-10 cm long slot is provided vertically downward from the upper edge of the kettle body along the inner wall of the kettle body.

[0015] Furthermore, a temperature measuring port, a circulating water inlet and a circulating water outlet are provided on the side wall of the kettle body.

[0016] Furthermore, a discharge port and an exhaust gas treatment port are provided at the bottom of the kettle body.

[0017] Furthermore, the tail gas treatment port at the bottom of the kettle body is connected to the tail gas treatment device through a pipeline.

[0018] Furthermore, the motor is arranged above the sealing device, the transmission shaft is vertically arranged in the center of the kettle body, the transmission shaft includes a top end and a bottom end, the top end of the transmission shaft is connected to the motor, and the bottom end of the transmission shaft is connected to the stirring paddle.

[0019] Furthermore, the reducer and the linkage are sequentially arranged below the motor and connected to the transmission shaft.

[0020] Furthermore, the fixing plate is composed of rectangular strip plates on the left and right sides that are perpendicular to the horizontal plane and a circular ring in the middle that is parallel to the horizontal plane, which are welded together.

[0021] Furthermore, the transmission shaft passes through the circular ring in the middle of the fixed plate, and the rectangular strip plates on both sides of the fixed plate are clamped in the long clamping grooves on the left and right sides of the inner wall of the kettle body.

[0022] Furthermore, the U-shaped stirring paddle is arranged at the bottom end of the transmission shaft and is connected to the transmission shaft by welding. The U-shaped stirring paddle is 20-40 cm away from the inner wall of the kettle body.

[0023] Furthermore, the paddle-type stirring paddle is arranged at the tail end of the transmission shaft and is located below the U-shaped stirring paddle.

[0024] Furthermore, the paddle-type stirring paddle is 20-50 cm away from the bottom of the kettle.

[0025] Furthermore, the paddle-type stirring blade includes 3-4 stirring blades, the stirring blades are stepped, the stirring blades are arranged obliquely to the horizontal plane, and the angle between the stirring blades and the horizontal plane is 30°.

[0026] Furthermore, the heating device is a jacket heating device, the jacket heating device is wrapped around the outer wall of the kettle body, and the jacket heating device is provided with an electric heating wire to heat the kettle body.

[0027] Furthermore, the cooling device is an inner coil cooling device, which is arranged in the kettle body, close to one side of the inner wall of the kettle body, 10-20 cm away from the kettle body, and 10-20 cm away from the U-shaped stirring paddle.

[0028] Furthermore, the inner coil cooling device is provided with a circulating water inlet and a circulating water outlet. The circulating water inlet of the inner coil cooling device is connected to the circulating water inlet of the side wall of the kettle body through a flange. The circulating water outlet of the inner coil cooling device is connected to the circulating water outlet of the side wall of the kettle body through a flange. Circulating water flows through the inner coil of the inner coil cooling device to cool the substance in the kettle body.

[0029] Furthermore, flanges are installed at the feed port, the gas outlet, the discharge port and the tail gas treatment port to seal the feed port, the gas outlet, the discharge port and the tail gas treatment port.

[0030] Beneficial effects of the utility model:

[0031] 1. The reactor in the present invention is of split type. A jacketed heating device is wrapped around the outside of the reactor body. The reactor is heated by the electric heating wire in the jacketed heating device. A coil cooling device is installed inside the reactor. Circulating water flows through the coil cooling device to cool the reactants in the reactor. The circulating water transfers heat with the reactants in the reactor. After heating, the circulating water is discharged from the coil cooling device and used to heat other devices, thereby recovering the heat of the reactor. While ensuring the stable operation of the reactor, the heat energy of the reactor is recovered, achieving the requirements of energy saving and environmental protection.

[0032] 2. The reactor in the present invention is sealed by mechanical sealing or magnetic sealing, and at the same time stirred by a stirring device to promote the reaction process in the reactor. In the present invention, the drive shaft is first fixed by a fixed plate, and the bottom of the drive shaft is equipped with a U-shaped stirring paddle and a paddle-type stirring paddle to prevent the reactants on the side wall of the reactor from being unable to be stirred in the large-volume reactor, affecting the reaction process and reducing product quality.

[0033] 3. In the reactor of the present invention, corrosion-resistant nickel alloy layers and titanium alloy layers are provided to ensure that when acid, alkali or corrosive organic matter is added during the preparation of titanium dioxide, the reactor will be corroded and its service life will be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of the improved reactor for titanium dioxide production described in the present utility model;

[0035] Figure 2 This is a schematic structural diagram of the top of the improved reactor for titanium dioxide production described in the present invention;

[0036] Figure 3 This is a schematic structural diagram of the stirring device in the improved reactor for titanium dioxide production described in the present utility model;

[0037] The numbers in the figure are: 1. Sealing device; 2. Kettle body; 3. Stirring device; 4. Heating device; 5. Cooling device; 6. Exhaust gas treatment device; 201. Kettle cover; 202. Kettle body; 301. Motor; 302. Reducer; 303. Linkage; 304. Drive shaft; 305. Fixed plate; 306. U-shaped stirring paddle; 307. Paddle-type stirring paddle; a. Sealing port; b. Feeding port; c. Vent port; d. Temperature measuring port; e. Circulating water inlet; f. Circulating water outlet; g. Discharge port; h. Exhaust gas treatment port. DETAILED DESCRIPTION

[0038] The utility model is described in detail below with reference to the embodiments:

[0039] The utility model provides an improved reactor for titanium dioxide production. The reactor is sealed by mechanical sealing or magnetic sealing and stirred by a stirring paddle, thereby greatly improving production efficiency and product performance.

[0040] Example 1

[0041] This embodiment provides an improved reactor for titanium dioxide production, which includes, from top to bottom, a sealing device 1, a reactor body 2, a stirring device 3, a heating device 4, a cooling device 5, and an exhaust gas treatment device 6; the sealing device 1 is a mechanical sealing device or a magnetic sealing device; a titanium alloy layer or a nickel alloy layer structure is provided on the inner wall of the reactor body 2; the stirring device 3 includes, from top to bottom, a motor 301, a reducer 302, a linkage 303, a transmission shaft 304, a fixed plate 305, and a stirring paddle; the stirring paddle includes a U-shaped stirring paddle 306 and a paddle-type stirring paddle 307.

[0042] In this embodiment, the sealing device 1 is located directly above the kettle body 2 and is coaxially arranged with the kettle body 2 and the stirring device 3;

[0043] The kettle body 2 is a split type, including a kettle body 202 and a kettle cover 201. The kettle body 202 and the kettle cover 201 are fixed by bolts to keep the kettle body 2 sealed; the kettle body 202 and the kettle cover 201 are both integral;

[0044] The kettle body 2 is cylindrical in shape, and the joints between the top and bottom of the kettle body 2 and the side walls of the kettle body 2 are rounded;

[0045] The titanium alloy layer or nickel alloy layer structure is closely attached to the inner wall of the kettle body 2, and the titanium alloy layer or nickel alloy layer structure is attached to the inner wall of the kettle body 2 by electroplating;

[0046] The top of the kettle cover 201 is provided with a sealing port a, a feed port b and a vent c, and the sealing device 1 is installed on the sealing port a on the top of the kettle cover 201;

[0047] On the left and right sides of the inner wall of the kettle body 202, an 8 cm long slot is provided vertically downward from the upper edge of the kettle body 202 along the inner wall of the kettle body 202;

[0048] The side wall of the kettle body 202 is provided with a temperature measuring port d, a circulating water inlet e and a circulating water outlet f; the bottom of the kettle body 202 is provided with a discharge port g and an exhaust gas treatment port h; the exhaust gas treatment port h at the bottom of the kettle body 202 is connected to the exhaust gas treatment device 6 through a pipeline;

[0049] The motor 301 is arranged above the sealing device 1, and the transmission shaft 304 is vertically arranged at the center of the kettle body 2. The transmission shaft 304 includes a top end and a bottom end. The top end of the transmission shaft 304 is connected to the motor 301, and the bottom end of the transmission shaft 304 is connected to the stirring paddle;

[0050] The reducer 302 and the linkage 303 are sequentially arranged below the motor 301 and connected to the transmission shaft 304; the fixed plate 305 is composed of rectangular strips perpendicular to the horizontal plane on the left and right sides and a circular ring in the middle parallel to the horizontal plane by welding; the transmission shaft 304 passes through the circular ring in the middle of the fixed plate 305, and the rectangular strips on both sides of the fixed plate 305 are clamped in the long grooves on the left and right sides of the inner wall of the kettle body 202;

[0051] The U-shaped stirring paddle 306 is provided at the bottom end of the transmission shaft 304 and is connected to the transmission shaft 304 by welding. The U-shaped stirring paddle 306 is 20 cm away from the inner wall of the kettle body 202. The paddle-type stirring paddle 307 is provided at the tail end of the transmission shaft 304 and is located below the U-shaped stirring paddle 306. The paddle-type stirring paddle 307 is 30 cm away from the bottom of the kettle body 2.

[0052] The paddle-type stirring blade 307 includes four stirring blades, each of which is stepped and arranged obliquely to the horizontal plane, with an angle of 30° between the stirring blades and the horizontal plane.

[0053] The heating device 4 is a jacket heating device; the jacket heating device 4 is wrapped around the outer wall of the kettle body 202, and an electric heating wire is provided in the jacket heating device 4 to heat the kettle body 2;

[0054] The cooling device 5 is an inner coil cooling device, which is arranged in the kettle body 202, close to the inner wall of the kettle body 202, 10 cm away from the kettle body 202, and 10 cm away from the U-shaped stirring paddle 306; the inner coil cooling device is provided with a circulating water inlet and a circulating water outlet, the circulating water inlet of the inner coil cooling device is connected to the circulating water inlet e on the side wall of the kettle body 202 through a flange, and the circulating water outlet of the inner coil cooling device is connected to the circulating water outlet f on the side wall of the kettle body 202 through a flange. Circulating water flows through the inner coil of the inner coil cooling device to cool the material in the kettle body 2;

[0055] Flanges are installed at the feed port b, the gas outlet c, the discharge port g and the tail gas treatment port h to seal the feed port b, the gas outlet c, the discharge port g and the tail gas treatment port h.

[0056] Based on the above, it can be seen that the improved reactor for titanium dioxide production described in the utility model has a wide range of applications, low cost, and extremely high market prospects.

[0057] The above description is merely a preferred embodiment of the present invention and does not constitute any other limitation to the present invention. Any modification or equivalent variation based on the technical essence of the present invention shall still fall within the scope of protection claimed by the present invention.

Claims

1. An improved reactor for titanium dioxide production, characterized in that: The improved reactor comprises, from top to bottom, a sealing device (1), a reactor body (2), a stirring device (3), a heating device (4), a cooling device (5), and an exhaust gas treatment device (6); the sealing device (1) is a mechanical sealing device or a magnetic sealing device; a titanium alloy layer or a nickel alloy layer structure is provided on the inner wall of the reactor body (2); the stirring device (3) comprises, from top to bottom, a motor (301), a reducer (302), a linkage (303), a transmission shaft (304), a fixed plate (305), and a stirring paddle; the stirring paddle comprises a U-shaped stirring paddle (306) and a paddle-type stirring paddle (307).

2. The improved reactor according to claim 1, characterized in that: The kettle body (2) is of a split type, comprising a kettle body (202) and a kettle cover (201); the kettle body (202) and the kettle cover (201) are fixed by bolts, so that the kettle body (2) remains sealed.

3. The improved reactor according to claim 1, characterized in that: The titanium alloy layer or nickel alloy layer structure is in close contact with the inner wall of the kettle body (2), and the titanium alloy layer or nickel alloy layer structure is adhered to the inner wall of the kettle body (2) by electroplating.

4. The improved reactor according to claim 2, characterized in that: On the left and right sides of the inner wall of the kettle body (202), a 5-10 cm long slot is provided vertically downward from the upper edge of the kettle body (202) along the inner wall of the kettle body (202).

5. The improved reactor according to claim 1, characterized in that: The motor (301) is arranged above the sealing device (1), and the transmission shaft (304) is vertically arranged at the center of the kettle body (2). The transmission shaft (304) includes a top end and a bottom end. The top end of the transmission shaft (304) is connected to the motor (301), and the bottom end of the transmission shaft (304) is connected to the stirring paddle.

6. The improved reactor according to claim 2, characterized in that: The transmission shaft (304) passes through the circular ring in the middle of the fixing plate (305), and the rectangular strips on both sides of the fixing plate (305) are clamped in the long clamping grooves on the left and right sides of the inner wall of the kettle body (202).

7. The improved reactor according to claim 2, characterized in that: The U-shaped stirring paddle (306) is arranged at the bottom end of the transmission shaft (304) and is connected to the transmission shaft (304) by welding. The U-shaped stirring paddle (306) is 20-40 cm away from the inner wall of the kettle body (202).

8. The improved reactor according to claim 1, characterized in that: The paddle-type stirring blade (307) includes 3-4 stirring blades, the stirring blades are stepped, the stirring blades are arranged obliquely to the horizontal plane, and the angle between the stirring blades and the horizontal plane is 30°.

9. The improved reactor according to claim 2, characterized in that: The heating device (4) is a jacket heating device (4); the jacket heating device (4) is wrapped around the outer wall of the kettle body (202); an electric heating wire is provided in the jacket heating device to heat the kettle body (2).

10. The improved reactor according to claim 2, characterized in that: The cooling device (5) is an inner coil cooling device, which is arranged in the kettle body (202), close to the inner wall of the kettle body (202), 10-20 cm away from the kettle body (202), and 10-20 cm away from the U-shaped stirring paddle (306).

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