Titanium tetrachloride tail gas recovery device

Abstract

The utility model discloses a titanium tetrachloride tail gas recovery device which comprises a leaching tank, a funnel is horizontally arranged in the leaching tank, a leaching pipe is arranged on the leaching tank, and the lower end of the leaching pipe penetrates through the funnel, extends to the lower side of the funnel and is connected with a first annular spray pipe. A second annular spraying pipe located above the funnel is arranged on the leaching pipe, one side of the leaching tank is communicated with an air inlet pipe located below the funnel, the leaching tank is communicated with an exhaust pipe located above the funnel, and a discharging mechanism is arranged at the bottom of the leaching tank. According to the titanium tetrachloride tail gas recovery device, titanium tetrachloride can be prevented from running out of the spraying tank along with waste gas, and titanium tetrachloride is further hydrolyzed.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium tetrachloride tail gas recovery, in particular to a titanium tetrachloride tail gas recovery device. Background Art

[0002] Titanium tetrachloride is an important chemical and metallurgical product and the main raw material for producing titanium dioxide and sponge titanium. The process method adopts boiling chlorination method for production. Since the chlorinated raw materials contain impurities such as water and volatiles, gaseous mixed products such as hydrogen chloride, silicon tetrachloride and titanium tetrachloride are easily generated during the main reaction in the chlorination furnace. The current method is to recover the product by condensation after multi-stage elution (generally three-stage elution). However, the gas after elution recovery still contains a large amount of hydrogen chloride and mixed gas, and carries some gaseous titanium tetrachloride products. Therefore, a tail gas recovery device that can further hydrolyze titanium tetrachloride is needed. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a titanium tetrachloride tail gas recovery device, which can further hydrolyze the gaseous titanium tetrachloride carried in the exhaust gas.

[0004] To achieve the above purpose, the utility model is implemented through the following technical scheme: a titanium tetrachloride tail gas recovery device, including a leaching tank, a funnel is horizontally arranged in the leaching tank, a leaching pipe is arranged on the leaching tank, the lower end of the leaching pipe passes through the funnel and extends to the lower side of the funnel and is connected to a first annular nozzle, a second annular nozzle located above the funnel is arranged on the leaching pipe, an air intake pipe located below the funnel is connected to one side of the leaching tank, an exhaust pipe located above the funnel is connected to the leaching tank, and a discharge mechanism is arranged at the bottom of the leaching tank.

[0005] Preferably, the first annular nozzle and the second annular nozzle are both coaxially arranged with the elution pipe.

[0006] Preferably, the discharge mechanism comprises a discharge pipe, and a valve is provided on the discharge pipe.

[0007] Preferably, a circular block coaxial with the elution tank is provided at the bottom, an annular groove is horizontally opened at the bottom of the elution tank between the circular block and the inner wall of the elution tank, the vertical section of the annular groove is semicircular, and the discharge mechanism is connected to the annular groove.

[0008] Preferably, a motor is vertically provided at the lower side of the rinsing tank, and the shaft end of the motor passes through the rinsing tank and the circular block and is connected to a scraper matching the inner wall of the rinsing tank.

[0009] The utility model provides a titanium tetrachloride tail gas recovery device, which has the following beneficial effects:

[0010] The titanium tetrachloride tail gas recovery device can separate the leaching tank into two parts by setting the funnel. After the first annular nozzle sprays the waste gas, the gas mixture products such as hydrogen chloride, silicon tetrachloride, titanium tetrachloride and the like in the waste gas are mixed with water, and the titanium tetrachloride and hydrogen chloride and other gases in the tail gas are absorbed. Titanium tetrachloride is hydrolyzed to generate titanium dioxide. Even if a small amount of gaseous titanium tetrachloride product enters the top of the funnel with the waste gas, the second annular nozzle can spray the waste gas again, so that the gaseous titanium tetrachloride in the waste gas is mixed with water, thereby generating titanium dioxide after hydrolysis. When in use, the titanium tetrachloride can be prevented from escaping from the spray tank with the waste gas, and the titanium tetrachloride is further hydrolyzed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0013] Figure 3 For this utility model Figure 2 Schematic diagram of the cross-sectional structure from top view.

[0014] In the figure: 1. rinsing tank; 4. rinsing pipe; 5. funnel; 6. first annular nozzle; 7. second annular nozzle; 8. air inlet pipe; 9. exhaust pipe; 10. discharge pipe; 11. valve; 12. round block; 13. annular groove; 14. motor; 15. scraper. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with specific embodiments. Figures 1 to 3 As shown:

[0016] Embodiment 1: A titanium tetrachloride tail gas recovery device comprises a leaching tank 1, one side of the leaching tank 1 is connected with an air inlet pipe 8 located below a funnel 5, and a gas mixture product such as hydrogen chloride, silicon tetrachloride, titanium tetrachloride, etc. produced in a chlorination furnace is discharged into the leaching tank 1 through the air inlet pipe 8;

[0017] A funnel 5 is horizontally arranged in the elution tank 1, and the air inlet 2 is located at the lower side of the funnel 5. A elution pipe 4 is arranged on the elution tank 1, and a large amount of alkali solution configured externally enters the elution pipe 4 under the transportation of the supply device;

[0018] The lower end of the elution pipe 4 passes through the funnel 5 and extends to the lower side of the funnel 5, where a first annular nozzle 6 is connected. After the gas mixture enters the elution tank 1 through the gas inlet 2, the mixed gas entering the elution tank 1 can be sprayed to fully mix the tail gas with water, absorb gases such as titanium tetrachloride and hydrogen chloride in the tail gas, and generate titanium dioxide precipitation after titanium tetrachloride is hydrolyzed, thereby achieving the purpose of gas recovery;

[0019] A second annular nozzle 7 is provided on the leaching pipe 4 and is located above the funnel 5. If titanium tetrachloride is mixed in the excess exhaust gas and flows to the top of the funnel 5, the exhaust gas flowing to the top of the funnel 5 can be sprayed again by the second annular nozzle 7, so that the gaseous titanium tetrachloride in the exhaust gas is mixed with water.

[0020] The rinsing tank 1 is connected to an exhaust pipe 9 located above the funnel 5 to facilitate exhaust gas discharge from the exhaust pipe 9. A discharge mechanism is provided at the bottom of the rinsing tank 1 to discharge the material remaining in the rinsing tank 1 through the discharge mechanism.

[0021] Embodiment 2: A titanium tetrachloride tail gas recovery device comprises a leaching tank 1, one side of the leaching tank 1 is connected with an air inlet pipe 8 located below a funnel 5, and a gas mixture product such as hydrogen chloride, silicon tetrachloride, titanium tetrachloride, etc. generated in a chlorination furnace is discharged into the leaching tank 1 through the air inlet pipe 8;

[0022] A funnel 5 is horizontally arranged in the elution tank 1, and the air inlet 2 is located at the lower side of the funnel 5. A elution pipe 4 is arranged on the elution tank 1, and a large amount of alkali solution configured externally enters the elution pipe 4 under the transportation of the supply device;

[0023] The lower end of the elution pipe 4 passes through the funnel 5 and extends to the lower side of the funnel 5, where a first annular nozzle 6 is connected. After the gas mixture enters the elution tank 1 through the gas inlet 2, the mixed gas entering the elution tank 1 can be sprayed to fully mix the tail gas with water, absorb gases such as titanium tetrachloride and hydrogen chloride in the tail gas, and generate titanium dioxide precipitation after titanium tetrachloride is hydrolyzed, thereby achieving the purpose of gas recovery;

[0024] A second annular nozzle 7 is provided on the leaching pipe 4 and is located above the funnel 5. If titanium tetrachloride is mixed in the excess exhaust gas and flows to the top of the funnel 5, the exhaust gas flowing to the top of the funnel 5 can be sprayed again by the second annular nozzle 7, so that the gaseous titanium tetrachloride in the exhaust gas is mixed with water.

[0025] The first annular nozzle 6 and the second annular nozzle 7 are both coaxially arranged with the elution pipe 4, and the first annular nozzle 6 and the second annular nozzle 7 are both connected with the elution pipe 4;

[0026] The rinsing tank 1 is connected to an exhaust pipe 9 located above the funnel 5, so that the exhaust gas can be discharged from the exhaust pipe 9. A discharge mechanism is provided at the bottom of the rinsing tank 1. The discharge mechanism includes a discharge pipe 10. A valve 11 is provided on the discharge pipe 10, and the material remaining in the rinsing tank 1 can be discharged through the discharge mechanism.

[0027] A circular block 12 coaxial with the elution tank 1 is provided at the bottom thereof, with a gap between the circular block 12 and the elution tank 1. An annular groove 13 located between the circular block 12 and the inner wall of the elution tank 1 is horizontally opened at the bottom of the elution tank 1. The vertical section of the annular groove 13 is semicircular. The discharge mechanism is connected to the annular groove 13, so that the material remaining in the elution tank 1 can flow into the annular groove 13, and then be discharged from the elution tank 1 through the discharge mechanism.

[0028] A motor 14 is vertically provided on the lower side of the elution tank 1. The motor 14 is coaxially arranged with the elution tank 1. The shaft end of the motor 14 passes through the elution tank 1 and the circular block 12 is connected with a scraper 15 matching the inner wall of the elution tank 1. The motor 14 is vertically arranged with its driving end facing upward. The motor 14 can drive the scraper 15 to rotate in a circle in the elution tank 1 with the axis of the elution tank 1 as the axis, so as to scrape off the residual material on the elution tank 1.

[0029] Working principle:

[0030] The alkaline solution prepared externally is transported to the leaching pipe 4 through the supply mechanism. When the tail gas is discharged into the leaching tank 1 from the air inlet pipe 8, the first annular nozzle 6 on the leaching pipe 4 can spray the waste gas entering the leaching tank 1, so that the tail gas is fully mixed with water, and the titanium tetrachloride and hydrogen chloride and other gases in the tail gas are absorbed. Titanium tetrachloride is hydrolyzed to generate titanium dioxide precipitation. If a small amount of gaseous titanium tetrachloride enters the top of the funnel 5 with the waste gas, the second annular nozzle 7 can be set to spray the waste gas again, so that the gaseous titanium tetrachloride in the waste gas is mixed with water and hydrolyzed, thereby achieving the purpose of tail gas recovery. The circular block 12, the motor and the scraper 15 can be set to scrape the residual material on the inner wall of the leaching tank 1. Through the setting of the annular groove 13, the material in the leaching tank 1 can be discharged from the discharge mechanism after entering the annular groove 13, and the waste gas can be discharged through the exhaust pipe 9.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A titanium tetrachloride tail gas recovery device, characterized in that: The invention comprises a rinsing tank (1), wherein a funnel (5) is horizontally arranged in the rinsing tank (1), a rinsing pipe (4) is arranged on the rinsing tank (1), the lower end of the rinsing pipe (4) passes through the funnel (5) and extends to the lower side of the funnel (5) and is connected to a first annular nozzle (6), the rinsing pipe (4) is provided with a second annular nozzle (7) located above the funnel (5), one side of the rinsing tank (1) is connected to an air inlet pipe (8) located below the funnel (5), the rinsing tank (1) is connected to an exhaust pipe (9) located above the funnel (5), and a discharge mechanism is arranged at the bottom of the rinsing tank (1).

2. A titanium tetrachloride tail gas recovery device according to claim 1, characterized in that: The first annular nozzle (6) and the second annular nozzle (7) are both coaxially arranged with the elution pipe (4).

3. A titanium tetrachloride tail gas recovery device according to claim 1, characterized in that: The discharge mechanism comprises a discharge pipe (10), and a valve (11) is provided on the discharge pipe (10).

4. A titanium tetrachloride tail gas recovery device according to claim 1, characterized in that: The bottom of the elution tank (1) is provided with a circular block (12) coaxial therewith, and an annular groove (13) is horizontally opened at the bottom of the elution tank (1) and located between the circular block (12) and the inner wall of the elution tank (1), the vertical cross-section of the annular groove (13) is semicircular, and the discharge mechanism is connected to the annular groove (13).

5. A titanium tetrachloride tail gas recovery device according to claim 4, characterized in that: A motor (14) is vertically arranged at the lower side of the elution tank (1), and the shaft end of the motor (14) passes through the elution tank (1) and the circular block (12) and is connected to a scraper (15) matching the inner wall of the elution tank (1).

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