Movable negative-pressure pumping device special for overhauling titanium tetrachloride production equipment

Abstract

The invention relates to the technical field of titanium tetrachloride production equipment. The invention provides a special mobile negative pressure extraction device for overhauling titanium tetrachloride production equipment, which comprises a smoke collecting hood for collecting tail gas; the venturi tube section is used for increasing the flow speed of the tail gas; the tube bundle spray tower is used for separating particulate matters in the tail gas; the negative suction fan is connected with the gas outlet of the tube bundle spray tower and is used for extracting the separated clean gas; the first nozzle is arranged at the throat part of the Venturi tube section and is used for spraying water to the throat part; the water tank is used for supplying water to the first nozzle and / or the tube bundle spray tower; and the movable base, the exhaust fume collecting hood, the Venturi tube section, the tube bundle spray tower, the negative suction fan and the water tank are integrally arranged on the upper side of the device. Through cooperative arrangement of the Venturi tube section and the tube bundle spray tower, the dust collection efficiency is high, the problem that washed tail gas carries water can be solved, blockage is not prone to occurring, maintenance is convenient, and the movable negative suction device can treat high-temperature and high-humidity corrosive gas containing particulate matter.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of titanium tetrachloride production equipment, in particular to a mobile negative pressure extraction device special for titanium tetrachloride production equipment maintenance. BACKGROUND

[0002] In the production process of titanium tetrachloride, some titanium tetrachloride equipment and pipelines need to be switched periodically. When the switched-off titanium tetrachloride equipment and pipelines are opened for maintenance, titanium tetrachloride reacts with external air and moisture to produce titanium oxychloride and hydrogen chloride gas. The hydrogen chloride gas turns into hydrochloric acid white mist when it meets water, which pollutes the on-site environment, increases the difficulty of maintenance for maintenance personnel, and causes harm to the body of the maintenance personnel.

[0003] Publication No. CN211963379U discloses a dust and white mist removal device for flue gas desulfurization outlet, which is characterized in that an outer cylinder is fixed on the shaft support in the vertical direction, a rotating shaft is arranged in the center of the outer cylinder in the vertical direction, the rotating shaft is arranged on the shaft support through a bearing and can rotate on the shaft support, a brush is fixed on the rotating shaft in the outer cylinder, and one end of the rotating shaft is fixedly connected with the output shaft of an electric motor. A ring-shaped water collecting tank is arranged at the lower end of the outer cylinder, and a water outlet is arranged on one side of the ring-shaped water collecting tank. The device provided by the patent removes smoke dust and white mist in flue gas by rotating the brush driven by the electric motor, and has a wide application range. However, the removal effect of the device on smoke dust and white mist is general, and the device cannot be applied to the treatment of flue gas containing hydrochloric acid white mist. SUMMARY

[0004] The problem solved by the present application is that in the prior art, titanium tetrachloride is left in the titanium tetrachloride production equipment and pipelines, which easily reacts with air and moisture during maintenance to produce titanium oxychloride and hydrogen chloride gas. The hydrogen chloride gas turns into hydrochloric acid white mist when it meets water, which pollutes the on-site environment, increases the difficulty of maintenance for maintenance personnel, and causes harm to the body of the maintenance personnel.

[0005] The present application discloses a mobile negative pressure extraction device special for titanium tetrachloride production equipment maintenance, which comprises:

[0006] A smoke collecting hood is used to detachably connect with the titanium tetrachloride production equipment to collect tail gas;

[0007] A Venturi tube section is connected with the outlet of the smoke collecting hood to increase the flow rate of the tail gas;

[0008] A pipe bundle spray tower is connected with the gas outlet of the Venturi tube section to separate particulate matters in the tail gas;

[0009] A negative pressure fan is connected with the spray tower gas outlet of the spray tower through the tail gas outlet pipe, and is used to extract the separated clean gas.

[0010] A first nozzle is arranged at the throat position of the Venturi tube section, and is used to spray water to the throat.

[0011] A water tank is arranged at a position close to the lower side of the spray tower, and is used to supply water to the first nozzle and / or the spray tower.

[0012] A movable base is arranged on the upper side of the movable base, and the smoke hood, the Venturi tube section, the spray tower, the negative pressure fan and the water tank are integrated on the upper side of the movable base.

[0013] Further, the Venturi tube section is a variable-diameter throat pipe structure, which is used to dynamically adjust the matching degree of the gas flow velocity and the liquid droplet size.

[0014] Further, the spray tower includes a spray tower gas inlet, a spray tower gas outlet, a second flushing pipe, a pipe bundle, a demister, a first flushing pipe, a spray pipe and a shell, the spray tower gas inlet is arranged at a position close to the lower side of the shell and is in communication with the Venturi tube section, the spray tower gas outlet is arranged at the upper end of the shell and is in communication with the negative pressure fan, the second flushing pipe, the pipe bundle, the demister, the first flushing pipe and the spray pipe are arranged in the shell from top to bottom, the spray pipe is located on the upper side of the spray tower gas inlet and is used to spray water mist downward, the first flushing pipe is used to spray water to the demister, and the second flushing pipe is used to spray water to the pipe bundle.

[0015] Further, the movable negative pressure device further includes a circulating spray pump, the circulating spray pump is in communication with the water tank, and is used to deliver the water in the water tank to the first nozzle and / or the second flushing pipe and / or the first flushing pipe and / or the spray pipe, and the water tank is at least partially in communication with the bottom of the shell, and is used to recycle the spray water or flushing water collected at the bottom of the shell.

[0016] Further, a liquid level meter is arranged in the water tank, and is used to monitor the liquid level in the water tank in real time.

[0017] Further, the water tank includes a spray water tank and a flushing water tank, the spray water tank is used to provide spray water to the first nozzle and the spray pipe, and the flushing water tank is used to provide flushing water to the second flushing pipe and the first flushing pipe.

[0018] Further, the shell is made of PP material.

[0019] Further, the pipe bundle has a plurality of blades arranged along the axial direction of each pipe bundle, and the centrifugal force generated by the rotation of the blades is used for gas-liquid separation.

[0020] Further, the pipe bundle has 5-20 pipe bundles, and the pipe bundle diameter is 200-300 mm.

[0021] Further, a tower inlet pressure transmitter is arranged on the pipeline close to the inlet of the spray tower, and a tower outlet pressure transmitter is arranged at the position close to the outlet of the spray tower, and the tower inlet pressure transmitter and the tower outlet pressure transmitter are used for cooperating to monitor the pressure drop of the pipe bundle spray tower.

[0022] Compared with the prior art, the mobile negative extraction device special for the titanium tetrachloride production equipment maintenance has the following advantages:

[0023] 1. By cooperating the Venturi tube section and the pipe bundle spray tower, the dust collection efficiency is high, the particulate matters and hydrogen chloride gas in the tail gas can be simultaneously sucked and separated from the tail gas, the problem of water carrying in the tail gas after washing can be solved, the device is suitable for the working condition with high particulate matter concentration, is not easy to be blocked, is convenient to maintain, avoids causing pollution to the on-site environment, and guarantees the personal safety of on-site maintenance personnel.

[0024] 2. The mobile negative extraction device can process high-temperature and high-humidity corrosive gas containing particulate matters, by arranging the inner blade of the pipe bundle, the local blocking and air flow short circuit phenomenon are avoided, and the equipment operation stability and air flow distribution uniformity are improved.

[0025] 3. The mobile negative extraction device is provided with rollers at the bottom, adopts integrated and modular design, is provided with a movable base and a quick connection interface, is convenient to flexibly arrange between different production equipment units, reduces equipment investment and moving cost, and improves the utilization rate of the mobile negative extraction device.

[0026] 4. The smoke collecting hood at the front end of the negative extraction pipe adopts automatic control, the angle and height of the negative extraction port are convenient to adjust, and the dust collection rate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a whole structure schematic view of the mobile negative extraction device special for the titanium tetrachloride production equipment maintenance according to the embodiment of the present application;

[0028] Figure 2 It is a cross section structure schematic view of the pipe bundle spray tower according to the embodiment of the present application.

[0029] MARKED DESCRIPTION:

[0030] 1, Venturi tube section; 2, pipe bundle spray tower; 21, spray tower inlet; 22, spray tower outlet; 23, second flushing pipe; 24, pipe bundle; 25, demister; 26, first flushing pipe; 27, spray pipe; 28, spray water tank; 29, flushing water tank; 3, water tank; 4, circulating spray pump; 5, tail gas outlet pipe; 6, negative extraction fan; 7, tower inlet pressure transmitter. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The specific embodiments described herein are only used to explain the present application, and are not used to limit the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0032] The following specifically describes a mobile negative extraction device for titanium tetrachloride production equipment maintenance with reference to the accompanying drawings.

[0033] Embodiment 1

[0034] The embodiment provides a mobile negative extraction device for titanium tetrachloride production equipment maintenance, as shown in Figure 1 , Figure 2 , comprising:

[0035] A smoke hood is used for detachable connection with the titanium tetrachloride production equipment to collect tail gas;

[0036] A Venturi tube section 1 is connected with the outlet of the smoke hood to lift the flow rate of the tail gas;

[0037] A pipe bundle spray tower 2 is connected with the gas outlet of the Venturi tube section 1 to separate particulate matters in the tail gas;

[0038] A negative extraction fan 6 is connected with the spray tower gas outlet 22 of the pipe bundle spray tower 2 through a tail gas outlet pipe 5 to extract the separated clean gas;

[0039] A first nozzle (not shown in the figure) is arranged at the throat position of the Venturi tube section 1 to spray water to the throat;

[0040] A water tank 3 is arranged at a position close to the lower side of the pipe bundle spray tower 2 to supply water to the first nozzle and / or the pipe bundle spray tower 2;

[0041] A movable base is arranged on the upper side of the movable base, and the smoke hood, the Venturi tube section 1, the pipe bundle spray tower 2, the negative extraction fan 6 and the water tank 3 are integrated on the upper side of the movable base.

[0042] Through the above setting, the mobile exhaust device as a whole adopts an integrated modular design, facilitating flexible arrangement between different production equipment units, collecting the tail gas in the smoke hood into the mobile exhaust device for treatment, reducing equipment investment and mobile cost, and meeting the demand for mobile exhaust. In the example, the Venturi tube section 1 is combined with the pipe bundle spray tower 2, and the first nozzle is arranged, so that the Venturi tube section 1 forms a primary treatment unit. When the tail gas collected by the smoke hood enters the Venturi tube section 1, the cross-sectional area of the converging section decreases, and the flow rate of the tail gas increases sharply. At the throat position of the Venturi tube section 1, water is injected into the high-speed airflow through the first nozzle. Under the high-speed impact of the gas, the water is broken into extremely fine droplets (diameter 10-100 microns), forming a large gas-liquid contact surface area. At this time, the particulate matter (such as dust, acid mist, heavy metal particles, etc.) in the tail gas collides with the droplets due to inertia. Since the smoke particles in the tail gas have a large mass, they cannot quickly turn with the airflow, and the droplets act as "obstacles". The particles are embedded in the droplets due to inertia, and the particle size is greatly increased through the collision and coagulation between the dust-containing gas. The treatment efficiency of particles larger than 0.5 microns in the tail gas in the Venturi tube section 1 is more than 90%. Subsequently, the gas-liquid mixture enters the expanding section of the Venturi tube section 1, the flow rate decreases, the pressure recovers, and enters the subsequent pipe bundle spray tower 2 for further treatment of the particulate matter in the tail gas. In the pipe bundle spray tower 2, the coagulated droplets and particles are further separated through corresponding spraying, flushing, centrifugal force, gravity and interception, thereby realizing the staged treatment of the tail gas. The dust removal efficiency of the tail gas is >99%, and the water removal efficiency is >95%. The mobile exhaust device provided in the example can simultaneously suck and separate the particulate matter and hydrogen chloride gas in the tail gas, effectively solve the problem of water carried by the tail gas after washing, is suitable for high-concentration particulate matter working conditions, is not easy to block, is easy to maintain, avoids pollution to the on-site environment, and also ensures the personal safety of on-site maintenance personnel.

[0043] As a preferred example, the position of the smoke hood relative to the Venturi tube section 1 is adjustable. It should be noted that the tail end of the smoke hood is connected to the Venturi tube section 1 through a flexible pipe, and the smoke hood is provided with a hydraulic system or other structure capable of driving the smoke hood to move. This setting makes the height and angle position of the smoke hood adjustable, so as to adapt to equipment units at different positions and heights, and significantly improves the adaptability of the mobile exhaust device.

[0044] As one optional example, the Venturi section 1 is a variable-diameter throat structure, used to dynamically adjust the matching degree between the airflow velocity and the droplet size. The variable-diameter throat structure means that the flow area of ​​the throat of the Venturi section 1 can be dynamically adjusted, for example, by changing the relative position of a movable conical pin, or by using a flexible material for the throat and applying external force through hydraulic pressure or an airbag to change its diameter; these methods are not limited here. Through the above configuration, the throat diameter of the Venturi section 1 can be adjusted according to the actual exhaust gas conditions to maintain the exhaust gas flow rate within a reasonable range, maximizing the collision efficiency between particles and droplets, thereby ensuring the effective treatment of particles by the Venturi section 1.

[0045] Optional, such as Figure 2 As shown, the tube bundle spray tower 2 includes a spray tower air inlet 21, a spray tower air outlet 22, a second flushing pipe 23, a tube bundle 24, a demister 25, a first flushing pipe 26, a spray pipe 27, and a shell. The spray tower air inlet 21 is located near the lower side of the shell and is connected to the Venturi tube section 1. The spray tower air outlet 22 is located at the upper end of the shell and is connected to the exhaust fan 6. The second flushing pipe 23, the tube bundle 24, the demister 25, the first flushing pipe 26, and the spray pipe 27 are arranged sequentially from top to bottom inside the shell. The spray pipe 27 is located above the spray tower air inlet 21 and is used to spray water mist downwards. The first flushing pipe 26 is used to spray water onto the demister 25, and the second flushing pipe 23 is used to spray water onto the tube bundle 24. The air inlet 21 of the spray tower is used to guide the exhaust gas, which has undergone primary treatment in the Venturi tube section 1, into the tube bundle spray tower 2. The exhaust gas entering the tube bundle spray tower 2 flows upward and collides with the water mist droplets sprayed from the spray pipe 27. Due to the large inertia of the particles, they cannot completely follow the airflow around the droplets and are therefore captured and intercepted by the droplets, thus completing the secondary purification of the exhaust gas. The remaining exhaust gas carries a large number of droplets and flows upward, passing through the demister 25 to remove the droplets and particles in the exhaust gas, reducing the problem of water carryover in the exhaust gas and also reducing the content of particulate matter. The first flushing pipe 26 is used to flush the lower surface of the demister 25 to prevent the channels on the demister 25 from being crystallized or adhered. The tube bundle 24 is used to separate liquid droplets (including captured particulate matter) in the exhaust gas after passing through the demister 25 using centrifugal force. The second flushing pipe 23 is used to flush the tube bundle 24 to remove the small particles accumulated in the tube bundle 24, prevent them from blocking the channels of the tube bundle 24, and ensure the stability of gas-liquid separation. The exhaust gas after being purified in multiple layers in the tube bundle spray tower 2 is drawn by the vacuum fan 6, enters the exhaust gas outlet pipe 5 through the spray tower outlet 22, and is finally discharged. This completes the suction dust removal and white mist removal process of the mobile vacuum device, realizing the graded treatment of exhaust gas with a dust removal efficiency of >99% and a water removal efficiency of >95%.

[0046] Preferably, the mobile pumping device further comprises a circulating spray pump 4, which is in communication with the water tank 3, for delivering water in the water tank 3 to the first nozzle and / or the second flushing pipe 23 and / or the first flushing pipe 26 and / or the spray pipe 27. The water tank 3 is at least partially in communication with the bottom of the shell, for recycling the spray water or flushing water collected in the bottom of the shell. It should be understood that in the present application, the water tank 3 can be provided as a larger tank, as shown in Figure 1 In the case that the water tank 3 is provided at the bottom of the pipe bundle spray tower 2, as shown, a corresponding settling zone can be provided in the water tank 3, and the particulate matter in the liquid collected in the water tank 3 can settle in the water tank 3, so that the circulating spray pump 4 can extract the liquid on the upper side which is relatively clear, thereby avoiding the blockage of the spray or flushing pipeline. More preferably, a corresponding filter or separator can be provided on the suction pipeline of the circulating spray pump 4, to further remove the particulate matter in the circulating water. Preferably, a corresponding blowdown valve or sludge pump is provided at the bottom of the water tank 3, for periodically discharging the high-concentration sludge settled therein, to ensure the stable operation of the system. It should be noted that the circulating spray pump 4 can be one or more than two, to be able to provide stable spray or flushing water for the first nozzle, the second flushing pipe 23, the first flushing pipe 26, and the spray pipe 27. Through the recycling of the flushing water, the water resource consumption and energy consumption of the system are saved.

[0047] As a preferred example, a liquid level gauge is provided in the water tank 3, for real-time monitoring of the liquid level in the water tank 3. Through the above-mentioned arrangement, the water level in the water tank 3 can be real-time regulated, and when the water level is too low, water can be added in time, and when the water level is too high, a part of the high-concentration sludge or water can be discharged, so that the water level in the water tank 3 can be maintained within a reasonable operating range.

[0048] Preferably, the water tank 3 comprises a spray water tank 28 and a flushing water tank 29, the spray water tank 28 being used to provide spray water for the first nozzle and the spray pipe 27, and the flushing water tank 29 being used to provide flushing water for the second flushing pipe 23 and the first flushing pipe 26. It should be understood that the spray water and the flushing water have different requirements for water quality, and the spray water has relatively high requirements for water quality. Through the separate arrangement of the spray water tank 28 and the flushing water tank 29, different filtering structures can be provided for the two, to meet the corresponding spray or flushing water requirements in different levels, thereby greatly reducing the risk of nozzle blockage. Preferably, the spray water tank 28 and the flushing water tank 29 independently perform corresponding water level detection, water replenishment, blowdown, water extraction, and other operations, thereby significantly improving the fineness of system control.

[0049] The pipe bundle 24 has a plurality of blades arranged along the axial direction of the pipe bundle 24, and the centrifugal force generated by the rotation of the blades is used for gas-liquid separation. Specifically, the axial direction of the pipe bundle 24 is arranged vertically. When the tail gas flows through the pipe bundle 24, the rotation of the blades generates corresponding centrifugal force, which throws the liquid droplets in the tail gas to the inner wall of the pipe bundle 24, thereby realizing gas-liquid separation, greatly reducing the content of small liquid droplets in the tail gas, and cooperating with the flushing of the second flushing pipe 23 to flush the liquid on the inner wall of the pipeline to the bottom of the pipe bundle spray tower 2, realizing efficient and precise separation of gas and liquid. Preferably, the pipe bundle 24 is arranged in a spiral staggered manner, which can enhance the gas-liquid turbulent flow, improve the gas-liquid separation efficiency, and reduce the pressure drop loss.

[0050] Optionally, the pipe bundle 24 has 5-20 pipe bundles 24, and the diameter of the pipe bundle 24 is 200-300 mm.

[0051] As one of the optional examples, the shell is made of PP material. The shell made of PP material can effectively resist the corrosion of hydrochloric acid white mist, and ensure the normal operation of the equipment.

[0052] Specifically, a tower inlet pressure transmitter 7 is arranged on the pipeline near the spray tower gas inlet 21, and a tower outlet pressure transmitter is arranged near the spray tower gas outlet 22. The tower inlet pressure transmitter 7 and the tower outlet pressure transmitter are used to monitor the pressure drop of the pipe bundle spray tower 2. Through the above arrangement, the pressure difference in the tower can be monitored in real time to diagnose the blockage in the tower, and / or as a control basis for automatic flushing. In addition, the degree of the tower inlet pressure transmitter 7 can also monitor the operating state of the Venturi tube section 1. The mobile negative pressure device is equipped with a PLC control system to monitor the operating state of the equipment in real time, automatically adjust the spraying amount, airflow speed and other parameters according to the pressure difference and other parameters, ensure that the system operates in the best working condition, and improve the stability of the equipment operation.

[0053] It should be noted that according to different tail gas treatment capacity, the inlet pipe diameter of the Venturi tube section 1, the flow, head, outlet pipe diameter of the pipe bundle spray tower 2, fan air volume and fan pressure and other parameters of the circulating spray pump 4 can be adjusted. Simple adjustment of these parameters is within the protection scope of the present application.

[0054] It should be noted that all the terms indicating the direction and position in the present application, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "top", "low", "tail end", "head end", "center", etc. are only used to explain the relative position relationship, connection condition, etc. between the components in a certain state, and are only for the convenience of describing the present application, and thus cannot be understood as the limitation on the present application which must be constructed and operated in a particular orientation. In addition, the description involving "first", "second", etc. in the present application is only for the description purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features.

[0055] Although the present application is disclosed as above, the present application is not limited to this. Any person skilled in the art, without departing from the spirit and scope of the present application, can make various changes and modifications, and thus the protection scope of the present application should be limited by the scope defined in the claims.

Claims

1. A mobile negative pressure device for maintenance of a titanium tetrachloride production facility, characterized by, The utility model relates to a kind of exhaust gas treatment device, including: Fume hood is used to be detachably connected with titanium tetrachloride production equipment to collect tail gas; Venturi section (1) is connected with the outlet of the fume hood, for lifting the flow rate of tail gas; Pipe bundle spray tower (2) is connected with the gas outlet of the venturi section (1), for separating particulate matters in tail gas; Negative fan (6) is connected with the spray tower gas outlet (22) of the pipe bundle spray tower (2) through tail gas outlet pipe (5), for extracting clean gas after separation; First nozzle is arranged at the throat position of the venturi section (1), for spraying water to throat; Water tank (3) is arranged at the position close to the lower side of the pipe bundle spray tower (2), for supplying water to first nozzle and / or pipe bundle spray tower (2); Movable base, the fume hood, venturi section (1), pipe bundle spray tower (2), negative fan (6) and water tank (3) are integrated on the upper side of the movable base.

2. The mobile negative pressure device for maintenance of a titanium tetrachloride production facility according to claim 1, characterized by The venturi section (1) is a variable-diameter throat pipe structure, for dynamically adjusting the matching degree of gas flow velocity and liquid drop particle size.

3. The mobile negative pressure device for maintenance of a titanium tetrachloride production facility according to claim 1, wherein The pipe bundle spray tower (2) includes spray tower gas inlet (21), spray tower gas outlet (22), second flushing pipe (23), pipe bundle (24), demister (25), first flushing pipe (26), spray pipe (27) and shell, the spray tower gas inlet (21) is arranged at the position close to the lower side of the shell, and is communicated with the venturi section (1), the spray tower gas outlet (22) is arranged at the upper end of the shell, and is communicated with the negative fan (6), the second flushing pipe (23), pipe bundle (24), demister (25), first flushing pipe (26) and spray pipe (27) are sequentially arranged in the shell from top to bottom, the spray pipe (27) is located at the upper side of the spray tower gas inlet (21), for downwardly spraying water mist, the first flushing pipe (26) is used for spraying water to demister (25), and the second flushing pipe (23) is used for spraying water to pipe bundle (24).

4. The mobile negative pressure device for maintenance of a titanium tetrachloride production facility according to claim 3, characterized by The mobile negative extraction device further includes circulating spray pump (4), the circulating spray pump (4) is communicated with the water tank (3), for conveying water in water tank (3) to first nozzle and / or second flushing pipe (23) and / or first flushing pipe (26) and / or spray pipe (27), the water tank (3) is at least partially communicated with the bottom of the shell, for recycling spray water or flushing water collected in the bottom of the shell.

5. The mobile negative pressure device for maintenance of a titanium tetrachloride production facility according to claim 4, characterized by Liquid level gauge is arranged in the water tank (3), for monitoring the liquid level in the water tank (3) in real time.

6. The mobile negative pressure device for maintenance of a titanium tetrachloride production facility according to claim 4, wherein The water tank (3) includes spray water tank (28) and flushing water tank (29), the spray water tank (28) is used to provide spray water to first nozzle and spray pipe (27), and the flushing water tank (29) is used to provide flushing water to second flushing pipe (23) and first flushing pipe (26).

7. The mobile negative pressure device for maintenance of a titanium tetrachloride production facility according to claim 3, wherein The shell is made of PP material.

8. The mobile negative pressure device for maintenance of a titanium tetrachloride production facility according to claim 3, wherein The pipe bundle (24) has a plurality of blades arranged along its axial direction, and the centrifugal force generated by the rotation of the blades is used for gas-liquid separation.

9. The mobile negative pressure device for maintenance of a titanium tetrachloride production facility according to claim 8, characterized by, The pipe bundle (24) has 5-20 blades, and the diameter of the pipe bundle (24) is 200-300 mm.

10. The mobile negative pressure device for maintenance of a titanium tetrachloride production facility according to claim 3, wherein A tower inlet pressure transmitter (7) is arranged on the pipeline close to the inlet (21) of the spray tower, and a tower outlet pressure transmitter is arranged close to the outlet (22) of the spray tower. The tower inlet pressure transmitter (7) and the tower outlet pressure transmitter are used to monitor the pressure drop of the tube bundle spray tower (2).

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