A device for producing titanium dioxide by chlorination method

Abstract

The present invention relates to the technical field of chemical equipment, and in particular to a device for producing titanium dioxide by a chlorination process, comprising a tank body, a ring-shaped heating mechanism for heating the tank body is provided on the middle outer wall of the tank body, a cover body is fixedly installed on the upper end of the tank body, an oxide feed pipe is fixedly installed on the top surface of the cover body, a plurality of discharge pipes are fixedly connected to the outer wall of the cover body, a cover body is fixedly installed inside the cover body, a movable cavity is opened inside the tank body, a fixed ring is also fixedly installed in the middle of the movable cavity, a reaction plate assembly is movably connected to the upper side of the fixed ring, and an air intake assembly is fixedly installed on the bottom surface of the movable cavity. By means of the fixed ring and the reaction plate assembly arranged inside the tank body, turbulence in the reaction area of ​​the tank body can be caused, and the turbulence can enable chlorine to fully react with metal powder oxides, effectively improve the reaction efficiency of metal oxides and chlorine, and increase the yield of reactants.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, and in particular to a device for producing titanium dioxide by a chlorination process. Background Art

[0002] Titanium dioxide is an important inorganic chemical pigment, the main component of which is titanium dioxide. There are two production processes for titanium dioxide: sulfuric acid process and chlorination process. The production process of titanium dioxide by chlorination process is mainly divided into three parts: chlorination, oxidation and post-treatment. In the chlorination stage, there are mainly fixed bed chlorination, molten salt chlorination and fluidized bed chlorination technologies. The fixed bed chlorination process has been eliminated, and the fluidized bed chlorination process is widely used abroad. China is still in the development stage of fast fluidized bed chlorination technology. The main equipment for fluidized bed chlorination is a boiling chlorination furnace. After adding titanium-rich materials such as rutile ore or Gaoqin slag into the chlorination furnace and grinding them, they are added to the boiling furnace from the top of the boiling layer with a certain proportion of petroleum coke, and chlorine is added from the bottom of the boiling furnace. The chlorination reaction is carried out continuously in the boiling furnace, and the oxides of iron, silicon, vanadium, calcium, magnesium and other metals are converted into The corresponding chloride leaves the chlorination furnace along with the gas. The reaction gas first passes through a cyclone separator to separate the unreacted solid dust and non-volatile chloride from the reaction gas, and then separates the chloride ferric chloride. Then, the low-boiling titanium tetrachloride (containing silicon tetrachloride and trichloroaluminate, etc.) is condensed and collected by cold titanium tetrachloride spraying and other methods. The mud is removed by filtering to obtain crude titanium tetrachloride. This is the chlorination process in the production process of titanium dioxide using the chlorination method. However, in the existing fluidized bed furnace, during the chlorination process, the gas and solid in the fluidized bed furnace cannot be fully contacted with the oxides of iron, silicon, alumina, calcium, magnesium and other metals due to the different addition directions of the solid and the gas. This results in less product and lower reaction efficiency. Summary of the invention

[0003] Technical issues solved

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a device for producing titanium dioxide by the chlorination method, which can effectively solve the problem that in the process of producing titanium dioxide by the chlorination method in the prior art, due to the different addition directions of the gas and solid in the boiling furnace, in the actual chlorination process, chlorine gas and oxides of iron, silicon, vanadium, calcium, magnesium and other metals cannot be fully contacted, resulting in less product and lower reaction efficiency.

[0005] Technical Solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a device for producing titanium dioxide by a chlorination process, comprising a tank body, a ring-shaped heating mechanism for heating the tank body is arranged on the middle outer wall of the tank body, a cover body is fixedly installed on the upper end of the tank body, an oxide feed pipe is fixedly installed on the top surface of the cover body, a plurality of discharge pipes are fixedly connected to the outer wall of the cover body, a cover body is fixedly installed inside the cover body, a movable cavity is opened inside the tank body, a fixing ring is also fixedly installed in the middle of the movable cavity, a reaction plate assembly is movably connected to the upper side of the fixing ring, an air intake assembly is fixedly installed on the bottom surface of the movable cavity, chlorine is injected into the movable cavity by means of an external pump body and through the air intake assembly to react with the oxide.

[0008] Furthermore, the annular heating mechanism includes a mounting ring and a heating plate arranged at an internal position thereof, the mounting ring is fixedly mounted on the outer wall of the tank body, an annular groove is opened inside the mounting ring, a baffle is fixedly mounted on the inner wall of the annular groove, two heating plates are symmetrically arranged and distributed inside the annular groove with the baffle as the symmetry axis, a fixing block is fixedly mounted on the outer wall of the mounting ring located at the baffle position, an air inlet pipe and an air outlet pipe connected to the annular groove are fixedly mounted on the inner wall of the fixing block, and the inner ends of the air inlet pipe and the air outlet pipe are respectively arranged on both sides of the baffle.

[0009] Furthermore, the cover body is an inverted copper bell-shaped structure, a through hole is penetrated through the bottom surface of the cover body, and inclined discharge holes are penetrated through the inner wall of the cover body in a ring shape at equal intervals. The inner end of the discharge pipe is connected to the active cavity, and the inner end of the discharge pipe is located at the lower side of the cover body.

[0010] Furthermore, a groove is provided inside the fixing ring, a through groove is provided on the bottom surface of the groove, a circular groove is provided on the upper outer wall of the fixing ring, circular holes are evenly provided on the inner wall of the circular groove, and sliding grooves are provided in a ring shape at equal intervals on the top surface of the circular groove.

[0011] Furthermore, the reaction plate assembly includes a breathable plate, the bottom surface of the breathable plate is ring-shaped and elastically connected to a movable plate at equal intervals, the top surface of the movable plate is connected and fixed to the bottom surface of the breathable plate by a spring, the bottom surface of the movable plate is fixedly connected to a displacement plate by a connecting rod, the outer wall of the displacement plate is slidably matched with the inner wall of the annular groove, and the movable plate is located on the upper side of the fixed ring.

[0012] Furthermore, the air intake assembly includes a mounting plate fixedly mounted on the inner wall of the active cavity, a connecting pipe fixedly mounted on the bottom surface of the mounting plate, a fixing plate fixedly mounted on the top surface of the mounting plate, a cavity is opened between the fixing plate and the middle part of the mounting plate, air outlet holes are evenly opened on the top surface of the fixing plate, the air outlet holes are in an inclined structure, the air outlet holes are connected to the cavity, and the connecting pipe is connected to the cavity.

[0013] Beneficial Effects

[0014] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0015] The present invention can cause turbulence in the reaction area of ​​the tank body by means of a fixing ring and a reaction plate assembly arranged inside the tank body, and the turbulence can enable chlorine to fully react with metal powder oxides, effectively improve the reaction efficiency of the metal oxides and chlorine, and increase the yield of reactants. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall external structure of the boiling furnace of the present invention;

[0018] Figure 2 It is a schematic diagram of the separation structure of the tank body and the annular heating mechanism of the present invention;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the mounting ring of the present invention;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of a tank body of the present invention;

[0021] Figure 5 It is a schematic diagram of the overall cross-sectional structure of the tank body of the present invention;

[0022] Figure 6 It is a schematic diagram of the overall explosion structure inside the active cavity of the present invention;

[0023] Figure 7 It is a schematic diagram of the cross-sectional structure of the air intake assembly of the present invention;

[0024] Figure 8 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0025] The numbers in the figure represent respectively: 1. tank body; 101. movable cavity; 2. mounting ring; 201. annular groove; 202. baffle; 3. fixing block; 301. air inlet pipe; 302. air outlet pipe; 4. heating plate; 5. cover body; 6. oxide feed pipe; 7. discharge pipe; 8. cover body; 801. through hole; 802. discharge hole; 9. fixing ring; 901. circular hole; 902. slide groove; 903. through groove; 904. groove; 905. annular groove; 10. reaction plate assembly; 1001. air permeable plate; 1002. spring; 11. movable plate; 1101. displacement plate; 12. air inlet assembly; 1201. mounting plate; 1202. connecting pipe; 13. fixing plate; 1301. cavity; 1302. air outlet. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The present invention will be further described below in conjunction with the embodiments.

[0028] Embodiment: A device for producing titanium dioxide by a chlorination process comprises a tank body 1, which is placed in a relatively high temperature environment to ensure that chlorine and metal oxides can react normally. An annular heating mechanism for heating the tank body 1 is provided on the outer wall of the middle part of the tank body 1. The annular heating mechanism can heat the tank body 1 or ensure a constant temperature environment for the tank body 1. Specifically, the annular heating mechanism comprises a mounting ring 2 and a heating plate 4 arranged at an inner position thereof. The heating plate 4 is connected to an external power source through a wire. The heating plate 4 is composed of a plurality of groups of bent heating wires. When the heating plate 4 is powered on, the heating plate 4 is heated to a temperature of 100 °C. After that, the heating wire can generate heat to heat up the inside of the tank body 1 or perform heat preservation treatment on it. The mounting ring 2 is fixedly mounted on the outer wall of the tank body 1. An annular groove 201 is provided inside the mounting ring 2. A baffle 202 is fixedly mounted on the inner wall of the annular groove 201. Two heating plates 4 are symmetrically arranged and distributed inside the annular groove 201 with the baffle 202 as the symmetry axis. A fixing block 3 is fixedly mounted on the outer wall of the mounting ring 2 located at the position of the baffle 202. An air inlet pipe 301 and an air outlet pipe 302 communicating with the annular groove 201 are fixedly mounted on the inner wall of the fixing block 3. The inner ends of the air inlet pipe 301 and the air outlet pipe 302 are respectively provided with The air inlet pipe 301 is connected to the outlet end of the external blower, and the air inlet of the blower is connected to the external chlorine source. When the chlorine passes through the heating plate 4, it can be heated to a certain temperature. The middle part of the annular groove 201 inside the mounting ring 2 is divided into a non-connected space by the baffle 202. Since the inner ends of the air inlet pipe 301 and the air outlet pipe 302 are respectively arranged on the two sides of the baffle 202, during use, when the chlorine is input into the tank body 1 through the blower, the chlorine is discharged from the air inlet pipe 301. 01 enters the interior of the annular groove 201, and after surrounding the tank body 1, it can be discharged through the air outlet pipe 302. In this process, the chlorine gas can be heated, and in this process, a heat-insulating layer with a relatively high temperature can be formed on the outer wall of the tank body 1 to ensure the internal temperature of the active cavity 101 inside the tank body 1. It is worth mentioning that the chlorine gas discharged from the air outlet pipe 302 is input into the active cavity 101 from the connecting pipe 1202 of the air inlet assembly 12 arranged on the bottom surface of the tank body 1, and the annular heating mechanism arranged on the outer wall of the tank body 1 is vertically aligned with the reaction position of the active cavity 101.

[0029] Refer to the attached Figure 4-5As shown in the figure, a cover body 5 is fixedly installed on the upper end of the tank body 1, an oxide feed pipe 6 is fixedly installed on the top surface of the cover body 5, a plurality of discharge pipes 7 are fixedly connected to the outer wall of the cover body 5, a cover body 8 is fixedly installed inside the cover body 5, and the cover body 8 is an inverted copper bell-shaped structure, a through hole 801 is penetrated through the bottom surface of the cover body 8, and inclined discharge holes 802 are penetrated through the inner wall of the cover body 8 in a ring shape at equal intervals, the inner end of the discharge pipe 7 is connected to the active cavity 101, and the inner end of the discharge pipe 7 is located at the lower side of the cover body 8. The cover body 5 arranged at the upper side of the tank body 1 can ensure the sealing of the inside of the tank body 1, and the oxide feed pipe 6 is fixedly installed on the outer wall of the cover body 5. The material feed pipe 6 is used to add solid powdered metal oxides into the active cavity 101 inside the tank body 1, and the cover body 8 arranged at the lower side of the cover body 5 is used to guide the added solid powder. When the metal oxide is added from above, it can fall downward due to its own gravity. When the powder falls from the through hole 801 at the lower end of the cover body 8, it can react with the chlorine gas blown in from the lower side. It is mentioned in the above embodiment that the position where the chlorine gas contacts and reacts with the solid powder is also the position where the annular heating mechanism is arranged on the outer wall of the tank body 1, and the discharge hole 802 arranged on the cover body 8 can also be used as a powder adding hole.

[0030] Refer to the attached Figure 4-6 As shown in the figure, an active cavity 101 is provided inside the tank body 1, and a fixing ring 9 is fixedly installed in the middle of the active cavity 101. A groove 904 is provided inside the fixing ring 9, and a through groove 903 is provided on the bottom surface of the groove 904. An annular groove 905 is provided on the upper outer wall of the fixing ring 9, and circular holes 901 are evenly provided on the inner wall of the annular groove 905. The top surface of the annular groove 905 is annular and has sliding grooves 902 at equal intervals. The through groove 903 on the bottom surface of the fixing ring 9 can guide the chlorine gas blown in from the lower side of the tank body 1. During the guiding process, part of the chlorine gas can flow from the through groove 903 to the active cavity 1. 01 is transported to the upper side of the rear tank body 1, and this part of the chlorine can directly react with the metal oxide solid powder dropped from the upper side of the rear tank body 1. Since an annular groove 905 is provided on the outer side of the upper end of the fixed ring 9, and a circular hole 901 is provided on the inner wall of the annular groove 905, another part of the chlorine can be transported to the upper side of the fixed ring 9. The advantage of setting the fixed ring 9 to this structure is that this part of the chlorine can reciprocate the reaction plate assembly 10 movably connected to the fixed ring 9, so that the air permeable plate 1001 inside the active cavity 101 inside the tank body 1 moves back and forth at the reaction position.

[0031] Refer to the attached Figure 4-6As shown in the figure, the upper side of the fixed ring 9 is movably connected with a reaction plate assembly 10, and the reaction plate assembly 10 includes a breathable plate 1001, and the bottom surface of the breathable plate 1001 is annular and elastically connected with a movable plate 11 at equal intervals. The top surface of the movable plate 11 is connected and fixed to the bottom surface of the breathable plate 1001 by a spring 1002, and the bottom surface of the movable plate 11 is fixedly connected to a displacement plate 1101 by a connecting rod. The outer wall of the displacement plate 1101 is slidably matched with the inner wall of the annular groove 905, and the movable plate 11 is located on the upper side of the fixed ring 9. The reaction plate assembly 10 can drive the movable plate 11 and the displacement plate 110 movably connected to the fixed ring 9 under the action of chlorine gas. 1 is adjusted in the vertical direction, and it is worth noting that when the set chlorine gas drives the displacement plate 1101 to move upward from the annular groove 905, after moving a certain distance, the circular hole 901 opened on the inner wall of the annular groove 905 is connected with the chlorine gas on the lower side of the fixed ring 9, so that the chlorine pressure at the lower side of the fixed ring 9 can make the movable plate 11 and the displacement plate 1101 reset. In the process of this reciprocating movement, the air permeable plate 1001 can be reciprocated. This reciprocating movement can cause gas turbulence at the reaction position in the active chamber 101, so that the chlorine gas can fully react with the metal powder oxide.

[0032] Refer to the attached Figure 7As shown in the figure, an air intake assembly 12 is fixedly installed on the bottom surface of the active chamber 101, and the air intake assembly 12 includes a mounting plate 1201 fixedly installed on the inner wall of the active chamber 101, a connecting pipe 1202 is fixedly installed on the bottom surface of the mounting plate 1201, and a fixing plate 13 is fixedly installed on the top surface of the mounting plate 1201. A cavity 1301 is opened between the fixing plate 13 and the middle part of the mounting plate 1201, and air outlet holes 1302 are evenly opened on the top surface of the fixing plate 13. The air outlet holes 1302 are inclined in structure, and the air outlet holes 1302 are connected with the cavity 1301, and the connecting pipe 1202 is connected with the cavity 1301. Chlorine is injected into the active chamber 101 with the help of an external pump body and through the air intake assembly 12 and reacts with the oxide. The connecting pipe 1202 in the air intake assembly 12, as mentioned in the above embodiment, can be connected with the air outlet pipe 302, or directly connected with the output end of the external pump body to supply chlorine. In particular, the air intake assembly 12 is provided. During use, after the chlorine gas is input from the provided connecting pipe 1202, the chlorine gas can enter the air outlet 1302 from the cavity 1301 and be poured into the interior of the tank body 1. Since the air outlet 1302 is provided in an inclined structure, the chlorine gas entering the active cavity 101 is in a spiral shape, so that it can react well with the metal reactant to improve the efficiency of the reaction. It is worth noting that by controlling the flow rate of the chlorine gas entering the active cavity 101, the metal powder falling from the upper side can always be in a relatively fixed area, that is, the reaction area. After the reaction is completed, by controlling the flow rate of the chlorine gas entering, the reacted chloride can be discharged from the discharge pipe 7 opened on the outside of the cover body 8 and located on the outer wall of the tank body 1 for collection. In the process, the addition of metal oxide is stopped and the oxide feed pipe 6 is sealed.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for producing titanium dioxide by chlorination process, characterized in that: The invention comprises a tank body (1), wherein a ring-shaped heating mechanism for heating the tank body (1) is provided on the outer wall of the middle part of the tank body (1), a cover body (5) is fixedly installed on the upper end of the tank body (1), an oxide feed pipe (6) is fixedly installed on the top surface of the cover body (5), a plurality of discharge pipes (7) are fixedly connected to the outer wall of the cover body (5), a cover body (8) is fixedly installed inside the cover body (5), an active cavity (101) is opened inside the tank body (1), a fixing ring (9) is also fixedly installed in the middle part of the active cavity (101), a reaction plate assembly (10) is movably connected to the upper side of the fixing ring (9), an air intake assembly (12) is fixedly installed on the bottom surface of the active cavity (101), chlorine gas is injected into the active cavity (101) by means of an external pump body and through the air intake assembly (12) to react with the oxide.

2. The device for producing titanium dioxide by chlorination process according to claim 1, characterized in that: The annular heating mechanism comprises a mounting ring (2) and a heating plate (4) arranged at an inner position thereof; the mounting ring (2) is fixedly mounted on the outer wall of the tank body (1); an annular groove (201) is provided inside the mounting ring (2); a baffle (202) is fixedly mounted on the inner wall of the annular groove (201); two heating plates (4) are symmetrically arranged and distributed inside the annular groove (201) with the baffle (202) as the axis of symmetry; a fixing block (3) is fixedly mounted on the outer wall of the mounting ring (2) at the position of the baffle (202); an air inlet pipe (301) and an air outlet pipe (302) which are in communication with the annular groove (201) are fixedly mounted on the inner wall of the fixing block (3); the inner ends of the air inlet pipe (301) and the air outlet pipe (302) are respectively arranged at positions on both sides of the baffle (202).

3. The device for producing titanium dioxide by chlorination process according to claim 2, characterized in that: The cover body (8) is in the form of an inverted copper bell-shaped structure. A through hole (801) is formed through the bottom surface of the cover body (8). Inclined discharge holes (802) are formed through the inner wall of the cover body (8) at equal intervals in a ring shape. The inner end of the discharge pipe (7) is connected to the active cavity (101). The inner end of the discharge pipe (7) is located at the lower side of the cover body (8).

4. The device for producing titanium dioxide by chlorination process according to claim 3, characterized in that: The fixing ring (9) has a groove (904) formed inside, a through groove (903) formed on the bottom surface of the groove (904), a circular groove (905) formed on the upper outer wall of the fixing ring (9), circular holes (901) formed evenly on the inner wall of the circular groove (905), and sliding grooves (902) formed in a ring shape and at equal intervals on the top surface of the circular groove (905).

5. The device for producing titanium dioxide by chlorination process according to claim 4, characterized in that: The reaction plate assembly (10) comprises a breathable plate (1001), the bottom surface of the breathable plate (1001) is in a ring shape and is elastically connected to a movable plate (11) at equal intervals, the top surface of the movable plate (11) is connected and fixed to the bottom surface of the breathable plate (1001) via a spring (1002), the bottom surface of the movable plate (11) is fixedly connected to a displacement plate (1101) via a connecting rod, the outer wall of the displacement plate (1101) is slidably matched with the inner wall of the annular groove (905), and the movable plate (11) is located on the upper side of the fixed ring (9).

6. The device for producing titanium dioxide by chlorination process according to claim 5, characterized in that: The air intake assembly (12) comprises a mounting plate (1201) fixedly mounted on the inner wall of the active cavity (101); a connecting pipe (1202) is fixedly mounted on the bottom surface of the mounting plate (1201); a fixing plate (13) is fixedly mounted on the top surface of the mounting plate (1201); a cavity (1301) is provided between the fixing plate (13) and the middle of the mounting plate (1201); air outlet holes (1302) are evenly provided on the top surface of the fixing plate (13); the air outlet holes (1302) are in an inclined structure; the air outlet holes (1302) are in communication with the cavity (1301); and the connecting pipe (1202) is in communication with the cavity (1301).

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