A reaction kettle for titanium dioxide processing

Abstract

The present invention relates to the technical field of titanium dioxide production and processing equipment, and specifically to a titanium dioxide processing reactor, comprising a tank body, wherein a crushing assembly and a reaction barrel are sequentially arranged in the tank body from top to bottom, wherein the crushing assembly is composed of a plurality of grinding wheels, which are regularly distributed in the tank body from top to bottom, and a feeding port for embryo powder to enter the tank body is provided on the grinding wheel located at the upper end of the tank body, and a grinding track is provided in the grinding wheel and located at the lower end of the feeding port, wherein the grinding track is communicated with the feeding port and is arranged directly below the feeding port, and the embryo powder is provided to perform circular motion in the grinding wheel. The present invention provides a feeding port at the upper part of the reactor, and when the raw material enters the barrel, the embryo material will be crushed in sequence by three grinding wheels, and by providing second outlet holes of different sizes, it is possible to prevent larger raw materials from falling, and at the same time, they will be pushed back into the chute by a pressing rod for secondary crushing, effectively preventing the possibility of agglomeration of the raw material entering the reaction barrel.

Description

Technical Field

[0001] The invention relates to the technical field of titanium dioxide production and processing equipment, and in particular to a reaction kettle for titanium dioxide processing. Background Art

[0002] Titanium dioxide is an important inorganic chemical product. It is used in coatings, inks, papermaking, plastics and rubber, chemical fibers, ceramics and other industries. It is a white pigment whose main component is titanium dioxide. There are two production processes for titanium dioxide: the sulfuric acid process and the chlorination process.

[0003] In the existing production and processing methods, whether it is the sulfuric acid method or the chlorination method, it is necessary to use a separate reaction container for production. During the processing, the raw materials need to be put into the corresponding reactor to allow the raw materials and reactants to react chemically. However, in actual use, the raw materials put in often cause the raw materials to agglomerate due to moisture in the air or other reasons. When reacting with the reactants, the contact area between the agglomerated raw materials and the reactants becomes smaller, resulting in insufficient product in the quantitative feeding process, affecting the efficiency of production and processing.

[0004] Therefore, a titanium dioxide processing reactor is proposed to solve the above-mentioned problems. Summary of the invention

[0005] Technical issues solved

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a reaction kettle for titanium dioxide processing, which can effectively solve the problem in the prior art that titanium dioxide raw materials are easy to agglomerate, resulting in low output efficiency.

[0007] Technical Solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] The present invention provides a reaction kettle for titanium dioxide processing, comprising a tank body, wherein a crushing assembly and a reaction cylinder are arranged in sequence from top to bottom in the tank body;

[0010] The grinding assembly is composed of a plurality of grinding wheels, which are regularly distributed in the tank from top to bottom;

[0011] A feeding port for feeding embryo powder into the tank body is arranged on the grinding wheel located at the upper end of the tank body;

[0012] A grinding track is arranged in the grinding wheel and located at the lower end of the feed inlet. The grinding track is connected to the feed inlet and is arranged directly below the feed inlet, so that the embryo powder can make a circular motion in the grinding wheel. The grinding wheels cooperate with each other and can grind the embryo powder from top to bottom into fine powder and flow into the reaction cylinder for reaction;

[0013] A connecting shaft rotatably mounted in the middle of the tank body;

[0014] A plurality of pressing rods are arranged at the outer end of the connecting shaft, each pressing rod cooperates with the grinding track on each grinding wheel to grind the embryo powder of a larger volume;

[0015] The filter screens installed at the bottom of the grinding wheel are rotated respectively, and the filter screens can periodically filter the embryo powder with a suitable volume to the next layer and prevent the embryo powder with a larger volume from entering the reaction cylinder.

[0016] Furthermore, three grinding wheels are arranged in sequence from top to bottom and are equidistantly distributed in the tank body, and the grinding wheel as a whole is a ring-shaped structure with an opening in the middle, the connecting shaft is vertically arranged in the middle of the grinding wheel, and the outer end of the connecting shaft is sequentially covered with three material retaining rings from top to bottom, the cross-section of the material retaining ring is trapezoidal and is respectively arranged at the opening of each grinding wheel, and the lower side end of the material retaining ring is in contact with the lower end of the grinding track and is on the same horizontal plane.

[0017] Furthermore, one end of the rolling track is concave inward from the inner ring side of the grinding wheel, and the rolling track is composed of two sections of semi-annular inclined grooves connected end to end, the height of the inclined groove gradually decreases, one end of the pressing rod extends into the inclined groove and can push the embryo powder to move in the inclined groove, and the pressing rod cooperates with the upper and lower groove surfaces in the inclined groove to crush larger volume block or granular embryo powder.

[0018] Furthermore, the pressing rod as a whole is a cone structure with an isosceles triangle cross-section, one end of which is vertically mounted on the side end wall of the connecting shaft, and the top angle end of the pressing rod moves in a circular motion along the tangential direction of the rolling track, and the pressing rod has grinding teeth evenly distributed on the upper and lower end faces in the rolling track.

[0019] Furthermore, a leakage hole is provided at the lower end of the chute in each grinding track for powder to fall, and the leakage hole includes:

[0020] A first outlet hole for fine powder to fall out;

[0021] A second outlet hole for the crushed embryo powder to fall out;

[0022] The diameter of the second outlet hole is greater than that of the first outlet hole, and the diameter of the second outlet hole on each grinding wheel decreases from top to bottom. The diameter of the second outlet hole in the grinding wheel at the lower end is the same as the diameter of the first outlet hole.

[0023] Furthermore, the ratio of the area formed by the first outlet holes in each of the rolling tracks to the area formed by the second outlet holes is 1:3.

[0024] Furthermore, the filter screen comprises:

[0025] An annular screen plate rotatably mounted inside the grinding wheel;

[0026] A feeding hopper installed at the lower end of the annular mesh plate;

[0027] The mesh plate is arranged just below the rolling track, and filter holes with the same size and volume as the leakage holes of the current layer are distributed on its end surface.

[0028] Furthermore, the diameter of the lower end of the material discharge funnel is smaller than the diameter of the upper end thereof, and the lower end of the material discharge funnel of each layer is respectively directed toward the upper end of the material blocking ring below.

[0029] Beneficial Effects

[0030] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0031] The present invention provides a feeding port at the upper part of the reaction kettle. When the raw materials enter the cylinder, the three grinding wheels will sequentially crush the blanks. When the blanks enter the grinding path of the grinding wheels of the first layer, the pressing rods will push the blanks to move toward the inclined slot through the rotation of the connecting shaft. The blanks will be crushed through the cooperation between the top angle end of the pressing rod and the upper and lower slot surfaces of the inclined slot. The crushed raw materials will fall from the leakage holes to the next layer of grinding wheels. By providing second outlet holes of different sizes, larger raw materials can be prevented from falling. At the same time, they will be pushed back into the inclined slot by the pressing rods for secondary crushing, which effectively prevents the possibility of agglomeration of the raw materials entering the reaction cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 For the present invention Figure 1 Schematic diagram of the structure at A in the middle;

[0035] Figure 3 It is a schematic diagram of the exploded structure of the crushing assembly of the present invention;

[0036] Figure 4 It is a schematic diagram of the side cross-sectional structure of the crushing assembly of the present invention;

[0037] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at B in the middle;

[0038] Figure 6It is a schematic diagram of the side cross-sectional structure of the grinding wheel of the present invention;

[0039] Figure 7 It is a schematic diagram of the displacement of the pressure rod of the present invention.

[0040] The numbers in the figure represent: 1. tank body; 2. crushing assembly; 21. grinding wheel; 211. feed inlet; 212. grinding track; 2121. chute; 213. filter screen; 2131. mesh plate; 2132. feed hopper; 2133. filter hole; 214. leakage hole; 2141. first outlet hole; 2142. second outlet hole; 3. reaction cylinder; 4. connecting shaft; 41. press rod; 411. grinding gear; 42. material retaining ring. DETAILED DESCRIPTION

[0041] 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.

[0042] The present invention will be further described below in conjunction with the embodiments.

[0043] Embodiment: A reactor for titanium dioxide processing comprises a tank body 1, in which a crushing component 2 and a reaction barrel 3 are arranged from top to bottom. The reaction barrel 3 in this example can make corresponding internal changes according to the actual processing method. The remaining components, such as heating and stirring, are common knowledge, and are not described in detail in this example and are not shown in the figures.

[0044] The grinding assembly 2 is composed of a plurality of grinding wheels 21, which are regularly distributed in the tank body 1 from top to bottom. Three grinding wheels 21 are arranged in sequence from top to bottom and are evenly distributed in the tank body 1. The grinding wheel 21 as a whole is an annular structure with an opening in the middle. The connecting shaft 4 is vertically arranged in the middle of the grinding wheel 21, and the outer end of the connecting shaft 4 is sequentially sleeved with three material blocking rings 42 from top to bottom. The material blocking ring 42 arranged in the first grinding wheel 21 has a small friction force with the grinding wheel 21 when rotating, and is inclined at an angle of 135 degrees with the rolling track 212, and is at the upper end of the rolling track 212 to prevent the blanks from leaking out of the gap between the rolling track 212 and the material blocking ring 42. In addition to playing the role of blocking, the remaining material blocking rings 42 can also guide the blanks flowing down from the upper discharge funnel 2132 to the current layer of the rolling track 212. At the same time, as the connecting shaft 4 rotates, the pressing rod 41 will rotate to push the blank in the rolling track 212. The cross-section of the material blocking ring 42 of the rolling track 212 is trapezoidal and is respectively arranged at the opening of each grinding wheel 21, and the lower side end of the material blocking ring 42 is in contact with the lower end of the rolling track 212 and is on the same horizontal plane.

[0045] A feeding port 211 for feeding embryo powder into the tank body 1 is provided on the grinding wheel 21 located at the upper end of the tank body 1. The feeding port 211 in this example penetrates obliquely downward and penetrates the upper end wall of the grinding channel 212. In actual use, for ease of use, a corresponding plugging structure can also be used to facilitate the unloading process. This is common knowledge and is not shown in this example.

[0046] The grinding track 212 is arranged in the grinding wheel 21 and located at the lower end of the feed port 211. The grinding track 212 is connected to the feed port 211 and is arranged directly below the feed port 211, so that the embryo powder can make a circular motion in the grinding wheel 21. Several grinding wheels 21 cooperate with each other and can grind the embryo powder from top to bottom into fine powder and flow into the reaction cylinder 3 for reaction. One end of the grinding track 212 is concave inward from the inner ring side of the grinding wheel 21, and the grinding track 212 is composed of two sections of semi-annular inclined grooves 2121 connected end to end. The upper and lower end surfaces of the inclined groove 2121 are arranged at symmetrical angles, and the height of the inclined groove 2121 gradually decreases. When feeding, the material will fall to a relatively high position, and the accumulated powder will be pushed by rotation until it contacts a relatively low position in the inclined groove 2121 for extrusion and crushing. One end of the pressing rod 41 extends into the chute 2121 and can push the embryo powder to move in the chute 2121, and the pressing rod 41 cooperates with the upper and lower groove surfaces in the chute 2121 to crush larger block or granular embryo powder. The lower end of the chute 2121 in each rolling channel 212 is provided with a leakage hole 214 for powder to fall, and the leakage hole 214 includes.

[0047] The first outlet hole 2141 for the fine powder to fall out, the powder in the blank that is originally small in volume and meets the requirements of the chemical reaction will fall layer by layer from the first outlet hole 2141 into the reaction tube 3.

[0048] The second outlet hole 2142 is for the crushed pieces of embryo powder to fall out. If the pieces after the crushing of the layer meet the diameter of the second outlet hole 2142, they will pass through the second outlet hole 2142 and fall to the next layer. If they cannot fall down, they will be pushed back into the grinding track 212 by the pressing rod 41 for secondary crushing.

[0049] The diameter of the second outlet hole 2142 is larger than the diameter of the first outlet hole 2141, and the diameter of the second outlet hole 2142 on each grinding wheel 21 decreases from top to bottom. The diameter of the second outlet hole 2142 in the grinding wheel 21 at the lower end is the same as the diameter of the first outlet hole 2141. The ratio of the area formed by the first outlet hole 2141 and the area formed by the second outlet hole 2142 in each grinding channel 212 is 1:3. When the crushing requirement is high, the area coverage of the second outlet hole 2142 can be reduced to reduce the outflow of the blanks in the current layer, and the crushing can be repeated in the grinding channel 212 for multiple cycles to improve the crushing quality.

[0050] The connecting shaft 4 is rotatably mounted in the middle of the tank body 1. The upper end of the connecting shaft 4 in this example is connected to the output shaft end of the driving motor or the cylinder. This is common knowledge and is not described or illustrated in detail in this example.

[0051] A plurality of pressing rods 41 are arranged at the outer end of the connecting shaft 4. The pressing rods 41 are in the form of a cone structure with an isosceles triangle cross section. The two "waist faces" face the upper and lower end faces in the roller track 212. At the same time, the initial rotation direction of the pressing rod 41 will move from a higher position in the roller track 212 to a lower position. The two chute 2121 will be crushed at one of them and then gathered at the connection and moved to the other chute 2121 for crushing again. One end of the pressing rod 41 is vertically mounted on the side end wall of the connecting shaft 4, and the top angle end of the pressing rod 41 moves in a circular motion along the tangential direction of the roller track 212. The pressing rod 41 is evenly distributed with grinding teeth 411 on the upper and lower end faces in the roller track 212. Each pressing rod 41 cooperates with the roller track 212 on each milling wheel 21 to crush a larger volume of embryo powder. In actual use, the upper and lower end faces in the chute 2121 can be covered with grinding teeth 411 in combination with actual needs to increase the force when being squeezed and improve the crushing effect.

[0052] The filter screen 213 installed at the lower part of the grinding wheel 21 is rotated respectively. The filter screen 213 can periodically filter the embryo powder of suitable volume to the next layer and prevent the embryo powder of larger volume from entering the reaction cylinder 3. The filter screen 213 includes.

[0053] An annular mesh plate 2131 is rotatably mounted in the grinding wheel 21. In this example, the mesh plate 2131 is relatively close to the lower end of the grinding track 212, so the amount of blanks falling into the gap is limited and will not affect the normal rotation of the coupling 4.

[0054] The feed hopper 2132 is installed at the lower end of the annular mesh plate 2131. In this example, the cross-section of the feed hopper 2132 is an inverted trapezoidal structure. The powder will slide down from its inner end surface, while the amount and speed of the blanks falling from the rolling track 212 are relatively low. They will not fall vertically, but will pass through the retaining ring 42 at the bottom of the feed hopper 2132 to guide the powder into the rolling track 212 of the current layer.

[0055] The mesh plate 2131 is arranged directly below the roller track 212, and filter holes 2133 of exactly the same size and volume as the leakage holes 214 of the current layer are distributed on its end surface. The lower end diameter of the discharge funnel 2132 is smaller than the upper end diameter, and the lower end of the discharge funnel 2132 of each layer faces the upper end of the lower material blocking ring 42 respectively.

[0056] To summarize, this embodiment proposes a reactor for titanium dioxide processing, comprising a tank body, in which a crushing assembly and a reaction cylinder are arranged in sequence from top to bottom, the crushing assembly is composed of a plurality of grinding wheels, which are regularly distributed in the tank body from top to bottom, and a feeding port for embryo powder to enter the tank body is provided on the grinding wheel located at the upper end of the tank body, and a grinding track is provided in the grinding wheel and located at the lower end of the feeding port, the grinding track is communicated with the feeding port and is arranged directly below the feeding port, so that the embryo powder can make a circular motion in the grinding wheel. Several grinding wheels cooperate with each other and can grind the embryo powder from top to bottom into fine powder and flow into the reaction cylinder for reaction. The connecting shaft installed in the middle of the tank body is rotated, and several pressing rods are arranged at the outer end of the connecting shaft. Each pressing rod cooperates with the grinding path on each grinding wheel to grind the larger volume of embryo powder. The filter screen installed at the bottom of the grinding wheel is rotated respectively. The filter screen can periodically filter the embryo powder of suitable volume to the next layer and prevent the larger volume of embryo powder from entering the reaction cylinder. By setting the feeding port at the upper part of the reactor, when the raw material enters the cylinder, the embryo material will be crushed in sequence by three grinding wheels. When the embryo material enters the grinding path of the grinding wheel of the first layer, the pressing rod pushes the embryo material toward the inclined groove through the rotation of the connecting shaft, and the embryo material is squeezed and crushed by the cooperation between the top angle end of the pressing rod and the upper and lower groove surfaces of the inclined groove. The crushed raw material will fall from the leak hole to the next layer of grinding wheel. By setting second outlet holes of different sizes, larger raw materials can be prevented from falling down, and at the same time, they will be pushed back into the chute by the pressing rod for secondary crushing, effectively avoiding the possibility of agglomeration of the raw materials entering the reaction cylinder.

[0057] 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 titanium dioxide processing reactor, characterized in that: include: A tank body, wherein a crushing assembly and a reaction cylinder are sequentially arranged in the tank body from top to bottom; The grinding assembly is composed of a plurality of grinding wheels, which are regularly distributed in the tank from top to bottom; A feeding port for feeding embryo powder into the tank body is arranged on the grinding wheel located at the upper end of the tank body; A grinding track is arranged in the grinding wheel and located at the lower end of the feed inlet. The grinding track is connected to the feed inlet and is arranged directly below the feed inlet, so that the embryo powder can make a circular motion in the grinding wheel. The grinding wheels cooperate with each other and can grind the embryo powder from top to bottom into fine powder and flow into the reaction cylinder for reaction; A connecting shaft rotatably mounted in the middle of the tank body; A plurality of pressing rods are arranged at the outer end of the connecting shaft, each pressing rod cooperates with the grinding track on each grinding wheel to grind the embryo powder of a larger volume; The filter screens installed at the bottom of the grinding wheel are rotated respectively, and the filter screens can periodically filter the embryo powder of suitable volume to the next layer and prevent the embryo powder of larger volume from entering the reaction cylinder; The three grinding wheels are arranged in sequence from top to bottom and are equidistantly distributed in the tank body, and the grinding wheel as a whole is an annular structure with an opening in the middle part, the connecting shaft is vertically arranged in the middle part of the grinding wheel, and the outer end of the connecting shaft is sequentially sleeved with three retaining rings from top to bottom, the cross-section of the retaining ring is trapezoidal and is respectively arranged at the opening of each grinding wheel, and the lower side end of the retaining ring and the lower end of the grinding track are in contact and are on the same horizontal plane; one end of the grinding track is concave inward from the inner ring side of the grinding wheel, and the grinding track is composed of two sections of semi-annular inclined grooves connected end to end, the height of the inclined groove gradually decreases, one end of the pressing rod extends into the inclined groove and can push the embryo powder to move in the inclined groove, and the pressing rod cooperates with the upper and lower groove surfaces in the inclined groove to squeeze larger volume of block or granular embryo powder.

2. A titanium dioxide processing reactor according to claim 1, characterized in that: The pressing rod is a cone structure with an isosceles triangle cross section. One end of the pressing rod is vertically mounted on the side end wall of the connecting shaft, and the top angle end of the pressing rod moves in a circular motion along the tangential direction of the rolling track. The pressing rod has grinding teeth evenly distributed on the upper and lower end faces in the rolling track.

3. A titanium dioxide processing reactor according to claim 2, characterized in that: A leakage hole for powder to fall is provided at the lower end of the chute in each grinding track, and the leakage hole includes: A first outlet hole for fine powder to fall out; A second outlet hole for the crushed embryo powder to fall out; The diameter of the second outlet hole is greater than that of the first outlet hole, and the diameter of the second outlet hole on each grinding wheel decreases from top to bottom. The diameter of the second outlet hole in the grinding wheel at the lower end is the same as the diameter of the first outlet hole.

4. A titanium dioxide processing reactor according to claim 3, characterized in that: The ratio of the area formed by the first outlet holes in each of the rolling tracks to the area formed by the second outlet holes is 1:

3.

5. A titanium dioxide processing reactor according to claim 1, characterized in that: The filter screen comprises: An annular screen plate rotatably mounted inside the grinding wheel; A feeding hopper installed at the lower end of the annular mesh plate; The mesh plate is arranged just below the rolling track, and filter holes with the same size and volume as the leakage holes of the current layer are distributed on its end surface.

6. A titanium dioxide processing reactor according to claim 5, characterized in that: The diameter of the lower end of the material discharge funnel is smaller than the diameter of the upper end thereof, and the lower end of the material discharge funnel of each layer faces the upper end of the lower material blocking ring respectively.

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