Online sealing and dredging device for producing titanium tetrachloride by using molten salt chlorination method

Abstract

The utility model belongs to the technical field of titanium tetrachloride production, and particularly discloses an on-line sealing and dredging device for producing titanium tetrachloride by a fused salt chlorination process, which is arranged on a pipeline to be dredged and comprises a flange plate connected to a joint of the pipeline to be dredged and a dredging rod arranged along the axial direction of the flange plate, after the dredging rod penetrates through the through hole, the end, located in the pipeline to be dredged, of the dredging rod is provided with a slag removing plate, the other end of the dredging rod is provided with a driving mechanism, and the end, close to the driving mechanism, of the flange plate is provided with a sealing adjusting assembly used for adjusting the gap between the flange plate and the dredging rod. According to the utility model, the gap between the sealing adjusting assembly and the dredging rod can be controlled through the sealing adjusting assembly, and as the conical fastening pipe fitting in the sealing adjusting assembly is in small-gap fit with the dredging rod, the risk of large-amplitude dissipation of gas is reduced, so that the pipeline can be dredged on line at any time, various problems caused by pipeline blockage are avoided, and the service life of the pipeline is prolonged. And the long-time stable operation of the system is ensured, so that the production efficiency of TiCl4 is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of titanium tetrachloride production, and specifically relates to an online sealing and dredging device for producing titanium tetrachloride by a molten salt chlorination method. Background Art

[0002] Titanium tetrachloride (TiCl4) is an important inorganic chemical. It is an intermediate product in the production process of titanium and its compounds, and is also an important raw material for titanium industry production. It is mainly used to produce magnesium-based titanium sponge, chloride-based titanium dioxide, and catalysts for olefin compounds. It can also be widely used in many fields such as chemical industry, electronics, agriculture, and military. In recent years, with the development of the global economy and the growth of emerging industries, the market demand for titanium tetrachloride has also been increasing.

[0003] At present, the production process of titanium tetrachloride mainly consists of three links: batching, chlorination and refining. Among them, the chlorination process mainly includes boiling chlorination method and molten salt chlorination method. However, the boiling chlorination method has extremely high requirements on the grade of titanium slag and the particle size of titanium slag in the production of TiCl4. It requires relatively low impurity components in titanium slag, especially the sum of CaO and MgO content is less than 2%. In addition, the boiling chlorination method has relatively high temperature requirements for the production of TiCl4, which needs to reach above 900°C. The molten salt chlorination method can use raw materials with high CaO and MgO content to produce TiCl4. In addition, the molten salt in the molten salt chlorination furnace is mainly composed of chlorides such as NaCl, CaCl2 and MgCl2. After the temperature of the molten salt reaches 750-780°C, it exists in the molten salt chlorination furnace in liquid form. The waste gas produced by the molten salt chlorination method is mainly CO2, which will not pollute and affect the environment when directly discharged into the air. Therefore, more and more manufacturers choose to use the molten salt chlorination method to produce TiCl4.

[0004] However, when TiCl4 is produced by the molten salt chlorination method, in order to remove the powdery and blocky particulate matter suspended in the pipeline from the molten salt chlorination furnace to the leaching tower, the weight of the impurities themselves is usually used to precipitate at the bottom of the pipeline, but the high-boiling impurities are precipitated very quickly in the pipeline under the high temperature condition of the chlorination furnace, so it is easy to accumulate into a large amount of blocky solids in the pipeline, causing pipeline blockage, forcing the furnace pressure to be too high to cause system abnormality. Therefore, in order to ensure safe production, it is necessary to dredge the pipeline from time to time. At present, the traditional method is to dredge the obstruction in the pipeline after stopping the furnace and opening the pipeline to the dust collecting slag tank. During the dredging process, the mixed gas in the pipeline will be discharged in an unorganized manner, which is more serious, resulting in a bad working environment, affecting physical and mental health. At the same time, the dredging labor intensity is large and time-consuming, which seriously affects the production progress of TiCl4.

[0005] In view of this, this utility model is proposed. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide an online sealing dredging device for producing titanium tetrachloride by a molten salt chlorination method. The dredging device of the utility model is provided with a sealing adjustment component, which greatly reduces the situation of mixed gas escaping when dredging the pipeline, thereby achieving the purpose of online dredging the pipeline, ensuring the production progress of TiCl4, and improving the production competitiveness of the enterprise.

[0007] The purpose of the utility model is to solve the problem through the following technical solutions:

[0008] The utility model provides an online sealing and dredging device for producing titanium tetrachloride by a molten salt chlorination method. The dredging device is arranged on a pipeline to be dredged in a molten salt chlorination workshop, and comprises a flange detachably connected to an interface of the pipeline to be dredged and a dredging rod axially arranged along the pipeline to be dredged, a through hole for the dredging rod to pass through is provided on the flange, after the dredging rod passes through the through hole provided in the flange, a slag cleaning plate is installed at one end of the dredging rod located in the pipeline to be dredged, and a driving mechanism is installed at the other end, the driving mechanism is used to drive the dredging rod and drive the slag cleaning plate to perform reciprocating linear motion along the axial direction in the pipeline to be dredged, a sealing adjustment component is provided on one end of the flange close to the driving mechanism, and the sealing adjustment component is arranged on the circumference of the dredging rod, and is used to adjust the gap between the dredging rod and the dredging rod.

[0009] Furthermore, the sealing adjustment assembly includes a sleeve with an external thread and a conical fastening fitting threadedly connected to the sleeve, one end of the sleeve is fixedly arranged on the end surface of the flange, and the other end is connected to a conical seal, and the conical seal is located on the inner side of the conical fastening fitting. The sleeve, conical fastening fitting and conical seal are all coaxial with the dredging rod and are all located on the circumference of the dredging rod. The position of the conical fastening fitting on the sleeve can be adjusted to change the degree of extrusion of the conical fastening fitting on the conical seal, so as to adjust the gap between the conical seal and the dredging rod.

[0010] Furthermore, an elastic sealing material is filled between the conical fastening pipe and the conical sealing member, and the elastic sealing material is rubber, silicone or polyurethane.

[0011] Furthermore, the tapered fastening pipe and the tapered sealing member have the same taper.

[0012] Furthermore, the inner wall of the large end of the tapered fastening pipe fitting is provided with an internal thread matching the external thread of the sleeve, and the inner wall of the small end of the tapered fastening pipe fitting is gap matched with the dredging rod.

[0013] Furthermore, the conical seal is detachably connected to the sleeve, and the conical seal is a soft-skinned metal seal.

[0014] Furthermore, the sleeve and the flange are fixedly connected as one body by welding or the two themselves are an integrally formed structure.

[0015] Furthermore, the sleeve and the flange are fixedly connected as one body by welding or the two themselves are an integrally formed structure.

[0016] Furthermore, the shape of the slag cleaning plate is semicircular, and the outer arc surface of the semicircular slag cleaning plate fits with the bottom inner wall of the pipeline to be cleared.

[0017] Furthermore, the through hole provided on the flange plate is clearance-matched with the dredging rod.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The dredging device provided by the utility model is directly arranged on the chlorination furnace pipeline in the molten salt chlorination workshop, and is mainly composed of a flange, a dredging rod, a slag cleaning plate, a driving mechanism and a sealing adjustment component. When dredging, it is only necessary to slightly loosen the degree of squeezing of the conical fastening pipe fittings on the conical seal and the elastic sealing material in the sealing adjustment component, so that the dredging rod can move freely along the axial direction of the pipeline. Since the through hole on the flange is matched with the clearance of the dredging rod (so that the amount of mixed gas leaking out is itself very small), and the arrangement of the elastic sealing material and the conical fastening pipe fittings further blocks the possibility of a large escape of the mixed gas, the dredging device of the utility model does not need to shut down the pipeline to open it, and can dredge foreign matter in the pipeline online at any time, thereby effectively solving various problems caused by pipeline blockage. After dredging, tighten the conical fastening pipe fittings, so that the conical seal and the elastic sealing material completely squeeze the circumference of the dredging rod, thereby ensuring the sealing of the dredging device. Based on the above reasons, the dredging device provided by the utility model can realize online dredging of the pipeline at any time, so that the pipeline always remains unobstructed, thereby ensuring the production efficiency of TiCl4 and improving the competitiveness of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings herein are incorporated into and constitute a part of this specification, and together with the description, are used to explain the principles of the present utility model.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of an online sealing and dredging device for producing titanium tetrachloride by a molten salt chlorination method according to the utility model.

[0023] In the figure:

[0024] 1 is a flange;

[0025] 2 is a dredging rod;

[0026] 3 is a slag cleaning plate;

[0027] 4 is a driving mechanism;

[0028] 5 is a sealing adjustment component; 51 is a sleeve; 52 is a tapered fastening pipe; 53 is a tapered sealing member; and 54 is an elastic sealing material. DETAILED DESCRIPTION

[0029] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples consistent with some aspects of the utility model described in detail in the attached claims.

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] See also Figure 1 The embodiment of the utility model provides an online sealing and unblocking device for producing titanium tetrachloride by molten salt chlorination method. The unblocking device is generally arranged on the chlorination pipeline in the molten salt chlorination workshop, and comprises a flange 1 and an unblocking rod 2. The flange 1 is detachably connected to the interface of the pipeline A to be unblocked, and a sealing ring is arranged between the two. The unblocking rod 2 is arranged along the axial direction of the pipeline A to be unblocked, and its length should be greater than the length of the pipeline A to be unblocked. The specific setting can be based on the actual situation. The flange 1 is provided with a through hole for the unblocking rod 2 to pass through. The unblocking rod 2 passes through After the through hole is opened in the flange 1, a slag cleaning plate 3 is installed at one end of the flange 1 located in the pipe A to be dredged, and a driving mechanism 4 is installed at the other end. The driving mechanism 4 is used to drive the dredging rod 2 and drive the slag cleaning plate 3 to make reciprocating linear motion along its axial direction in the pipe A to be dredged, thereby achieving the purpose of pushing foreign matter in the pipe into the dust collecting tank connected to the pipe. A sealing adjustment component 5 is provided on the end of the flange 1 close to the driving mechanism 4, and the sealing adjustment component 5 is arranged on the circumference of the dredging rod 2 for adjusting the gap between it and the dredging rod 2.

[0032] Specifically, in the embodiment of the utility model, the through hole opened on the flange 1 is matched with the clearance of the clearing rod 2, and the smaller the clearance, the better, as long as the clearing rod 2 can be allowed to move freely in a straight line along the axial direction of the pipe A to be cleared. Setting a small clearance can reduce the risk of large-scale escape of mixed gas in the pipe from that place from the source, and reduce the pressure during subsequent sealing.

[0033] In the embodiment of the utility model, the shape of the slag cleaning plate 3 is semicircular, and the outer arc surface of the semicircular slag cleaning plate fits the bottom inner wall of the pipe A to be dredged, so that when the dredging rod 2 drives the slag cleaning plate 3 to clean the foreign matter deposited in the pipe, it can dredge all the foreign matter in the pipe into the dust collecting slag tank as much as possible. Preferably, the end of the dredging rod 2 is connected to the geometric center of the end of the slag cleaning plate 3 to ensure that the slag cleaning plate 3 is balanced by force; in addition, since the slag cleaning plate 3 is easily worn due to long-term friction with the pipe wall, the slag cleaning plate 3 and the dredging rod 2 are detachably connected to facilitate regular replacement. The more preferred slag cleaning plate 3 is made of wear-resistant material to increase its service life and reduce the frequency of replacement.

[0034] In the embodiment of the utility model, the driving mechanism 4 can be driven by a hydraulic cylinder or a motor, as long as it can drive the dredging rod 2 to drive the slag cleaning plate 3 to make reciprocating linear motion along the axial direction of the pipeline A to be dredged. The specific form of the driving mechanism is not limited in the utility model, and the existing structure can be directly used, and no further details are given. Of course, in order to save costs, a driving handle can also be set at the end of the dredging rod 2, and the dredging can be achieved by manpower acting on the driving handle.

[0035] It should be particularly noted that in the embodiment of the utility model, the sealing adjustment component 5 includes a sleeve 51 and a tapered fastening pipe fitting 52, one end of the sleeve 51 is fixedly connected to the outer end surface of the flange 1, for example, by welding or the two are an integrally formed structure, and the other end of the sleeve 51 is detachably connected to an elastic tapered seal 53, and the tapered seal 53 presents a closing structure as the distance from the flange 1 increases from near to far, that is, the outer diameter of the tapered seal 53 close to the flange 1 is larger than the outer diameter of the end away from the flange 1, and the tapered fastening pipe fitting 52 located on the outside of the tapered seal 53 is similar to its structural layout, except that the tapered fastening pipe fitting 52 cannot be deformed, and the inner wall of the large end is provided with an internal thread matching the external thread of the sleeve 51, and the inner wall of the small end is matched with a small gap with the dredging rod 2, and the above sleeve 51, tapered fastening pipe fitting 52 and tapered seal 53 are all coaxially arranged with the dredging rod 2 and are all located on the circumference of the dredging rod 2. It can be known from the above settings that by rotating and driving the conical fastening fitting 52 to different positions on the sleeve 51, the degree of squeezing of the conical fastening fitting 52 on the conical seal 53 can be changed. In addition, the conical seal 53 is a variable elastic conical structure. According to the principle of self-centering of the conical outer surface under force, it can be used to adjust the gap between it and the dredging rod 2, thereby achieving a completely sealed state when not dredging.

[0036] Preferably, in the embodiment of the utility model, the conical fastening fitting 52 and the conical seal 53 have the same taper to ensure that the circumferential surface of the conical seal 53 is subjected to uniform force when it is squeezed, that is, the gap between it and the dredging rod 2 is simultaneously limited until it is completely tightly fitted, thereby achieving a stable and reliable sealing effect. The conical seal 53 can be a soft metal seal.

[0037] When the dredging device of the utility model is used to dredge the pipeline, it is necessary to release the squeezing force applied by the conical fastening pipe 52 to the conical seal 53 so that the dredging rod 2 can move freely along the axial direction of the pipeline, but at this time, it is easy to cause the mixed gas escaping from the dredging rod 2 and the through hole to escape from the sealing adjustment component. For this reason, the embodiment of the utility model is filled with elastic sealing material 54 in the conical fastening pipe 52 and the conical seal 53. The elastic sealing material 54 can be selected from rubber, silicone or polyurethane. Since the elastic sealing material 54 is always squeezed and confined between the conical fastening pipe 52 and the conical seal 53, even when the conical seal 53 is not in close contact with the dredging rod 2, the elastic sealing material 54 can still play a certain sealing role to reduce the amount of mixed gas escaping from the sealing adjustment component 5.

[0038] In addition, since the pipeline A to be dredged is often quite long, the length of the dredging rod 2 may need to be several meters, but the only supports of the dredging rod 2 are the cleaning plate 3 and the flange 1 at the end. This makes it easy for the driving mechanism 4 to swing when driving the dredging rod 2. For this reason, a linear bearing (not marked in the figure) is installed in the sleeve 51 in the embodiment of the utility model, and the linear bearing is slidably connected to the dredging rod 2. That is to say, the stability of the dredging rod 2 is improved by the support of the linear bearing.

[0039] The use process of the utility model dredging device is as follows:

[0040] When it is necessary to dredge the pipeline A to be dredged, operate and rotate the conical fastening fitting 52 threaded on the sleeve 1 to gradually move it away from the flange 1. At this time, the conical seal 53 can gradually get rid of the extrusion force exerted on it by the conical fastening fitting 52 and the elastic sealing material 54, so that a gap is generated between the elastic conical seal 53 and the dredging rod 2. At this time, the dredging rod 2 can be driven by the driving mechanism 4 and the slag cleaning plate 3 can be driven to push the foreign matter in the pipeline into the dust collecting slag tank. When the dredging work is completed; then rotate the conical fastening fitting 52 in the opposite direction to gradually approach the flange 1. At this time, the inner cone surface of the conical fastening fitting 52 first squeezes the elastic sealing material 54 and then the small port of the conical seal 53 gradually shrinks during the squeezing until the conical seal 53 is completely squeezed and fits the outer surface of the dredging rod 2, and the sealing operation is completed.

[0041] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0042] It should be understood that the present invention is not limited to the above-described contents, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. An online sealing dredging device for producing titanium tetrachloride by molten salt chlorination method, wherein the dredging device is arranged on a pipeline (A) to be dredged in a molten salt chlorination workshop, characterized in that: The invention comprises a flange (1) detachably connected to the interface of a pipeline (A) to be dredged and a dredging rod (2) arranged axially along the pipeline (A) to be dredged. The flange (1) is provided with a through hole for the dredging rod (2) to pass through. After the dredging rod (2) passes through the through hole provided in the flange (1), one end of the dredging rod (2) located in the pipeline (A) to be dredged is provided with a slag cleaning plate (3), and the other end is provided with a driving mechanism (4). The driving mechanism (4) is used to drive the dredging rod (2) and drive the slag cleaning plate (3) to perform reciprocating linear motion along the axial direction in the pipeline (A) to be dredged. A sealing adjustment component (5) is arranged on the end of the flange (1) close to the driving mechanism (4), and the sealing adjustment component (5) is arranged on the circumference of the dredging rod (2) and is used to adjust the gap between the sealing adjustment component (5) and the dredging rod (2).

2. The online sealing and dredging device for producing titanium tetrachloride by the molten salt chlorination process according to claim 1, characterized in that: The sealing adjustment assembly (5) comprises a sleeve (51) with an external thread and a conical fastening pipe fitting (52) threadedly connected to the sleeve (51); one end of the sleeve (51) is fixedly arranged on the end surface of the flange (1); the other end is connected to a conical sealing member (53), and the conical sealing member (53) is located on the inner side of the conical fastening pipe fitting (52); the sleeve (51), the conical fastening pipe fitting (52) and the conical sealing member (53) are all coaxial with the dredging rod (2) and are all located on the circumference of the dredging rod (2); the position of the conical fastening pipe fitting (52) on the sleeve (51) is adjusted to change the degree of squeezing of the conical fastening pipe fitting (52) on the conical sealing member (53), so as to adjust the gap between the conical sealing member (53) and the dredging rod (2).

3. The online sealing and dredging device for producing titanium tetrachloride by molten salt chlorination process according to claim 2, characterized in that: An elastic sealing material (54) is filled between the conical fastening pipe (52) and the conical sealing member (53).

4. The online sealing and dredging device for producing titanium tetrachloride by the molten salt chlorination process according to claim 2, characterized in that: The conical fastening pipe member (52) and the conical sealing member (53) have the same taper.

5. The online sealing and dredging device for producing titanium tetrachloride by molten salt chlorination process according to claim 2, characterized in that: The inner wall of the large end of the tapered fastening pipe fitting (52) is provided with an internal thread matching the external thread of the sleeve (51), and the inner wall of the small end of the tapered fastening pipe fitting (52) is clearance-matched with the dredging rod (2).

6. The online sealing and dredging device for producing titanium tetrachloride by molten salt chlorination process according to claim 2, characterized in that: The conical sealing member (53) is detachably connected to the sleeve (51), and the conical sealing member (53) is a soft metal sealing member.

7. The online sealing and dredging device for producing titanium tetrachloride by molten salt chlorination method according to claim 2, characterized in that: A linear bearing is arranged in the sleeve (51), and the linear bearing is slidably connected to the dredging rod (2).

8. The online sealing and dredging device for producing titanium tetrachloride by molten salt chlorination process according to claim 2, characterized in that: The sleeve (51) and the flange (1) are fixedly connected as one body by welding, or the two themselves are an integrally formed structure.

9. The online sealing and unblocking device for producing titanium tetrachloride by molten salt chlorination method according to any one of claims 1 to 8, characterized in that: The shape of the slag cleaning plate (3) is semicircular, and the outer arc surface of the semicircular slag cleaning plate (3) fits the bottom inner wall of the pipeline (A) to be cleared.

10. The online sealing and dredging device for producing titanium tetrachloride by the molten salt chlorination process according to claim 9, characterized in that: The through hole formed on the flange (1) is clearance-matched with the dredging rod (2).

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