Continuous vacuum crystallizer for titanium liquid

Abstract

The utility model relates to the field of titanium dioxide processing equipment, in particular to a titanium liquid continuous vacuum crystallizer which comprises a titanium liquid input pipe and six crystallization chambers connected in sequence, the bottoms of the adjacent crystallization chambers are communicated with each other, a spray tower is arranged on the first crystallization chamber and communicated with the first crystallization chamber, and the spray tower is communicated with the second crystallization chamber. The titaniferous solution input pipe is connected to the top of the spray tower and extends into the spray tower, a spray head is arranged on the titaniferous solution input pipe in the spray tower, a discharge pipe is arranged at the lower end of the crystallization chamber at the tail end, and a stirring device is arranged in each crystallization chamber and is used for scraping sediments at the bottom of the crystallization chamber. According to the continuous vacuum crystallizer for the titanium liquid, the vacuum pipe connector is connected with a vacuum device to control the vacuum degree of each crystallization chamber, so that the titanium liquid flows through the crystallizer with the gradually increased vacuum degree once after being cooled in the spraying tank, the titanium liquid is continuously crystallized in the process, the crystallization stability is high, the equipment runs uninterruptedly, the efficiency is improved, and the production cost is reduced. And the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the field of titanium dioxide processing equipment, in particular to a titanium liquid continuous vacuum crystallizer. Background Art

[0002] At present, in the production process of titanium dioxide by sulfuric acid method, when the titanium liquid is crystallized to precipitate ferrous sulfate, chilled water is used to cool the titanium liquid, allowing the ferrous sulfate to precipitate in the form of crystals, and then the titanium dioxide and ferrous sulfate are separated through the subsequent process.

[0003] The crystallizer currently used to precipitate ferrous sulfate from titanium liquid is typically a container evacuated to a certain vacuum level. However, due to the large space within the crystallizer and the poor fluidity of the titanium liquid, the crystallization is unstable and prone to incomplete precipitation, which affects subsequent separation. Furthermore, existing crystallizers cannot achieve continuous crystallization and require intermittent start-stopping, which is prone to wear, high energy consumption, and low yield. Utility Model Content

[0004] In order to solve the above technical deficiencies, the utility model provides a titanium liquid continuous vacuum crystallizer, which can realize continuous crystallization during the flow of titanium liquid to ensure the stability and reliability of the crystallization process.

[0005] The utility model discloses a titanium liquid continuous vacuum crystallizer, which comprises a titanium liquid input pipe, at least two crystallization chambers connected in sequence, the bottoms of adjacent crystallization chambers are communicated with each other, a spray tower is provided on the first crystallization chamber, the spray tower is communicated with the first crystallization chamber, the titanium liquid input pipe is connected to the top of the spray tower and extends to the interior, a spray head is provided on the titanium liquid input pipe inside the spray tower, a discharge pipe is provided at the lower end of the terminal crystallization chamber, a vacuum tube connection port is provided on the top of the spray tower on the first crystallization chamber, vacuum tube connection ports are provided on the tops of the remaining crystallization chambers, a stirring device is provided in each crystallization chamber, and the stirring device is used to scrape off the sediment at the bottom of the crystallization chamber.

[0006] As an optimization, the number of crystallization chambers is 4 or more. Except for the first crystallization chamber and the end crystallization chamber, the two adjacent crystallization chambers are connected to the top of the previous crystallization chamber by a reflux pipe from the bottom of the latter crystallization chamber, and a reflux pump is provided on the reflux pipe.

[0007] After further optimization, the number of crystallization chambers is 6, which are defined as: crystallization chamber No. 1, crystallization chamber No. 2, crystallization chamber No. 3, crystallization chamber No. 4, crystallization chamber No. 5, and crystallization chamber No. 6; crystallization chamber No. 1, crystallization chamber No. 2, and crystallization chamber No. 3 are arranged in one crystallization tank, and crystallization chamber No. 4, crystallization chamber No. 5, and crystallization chamber No. 6 are arranged in another crystallization tank; the crystallization tank includes a closed cylinder, and two partitions are arranged in the cylinder at intervals, and the partitions divide the interior of the cylinder into three independent cavities, which are crystallization chamber No. 1, crystallization chamber No. 2, and crystallization chamber No. 3 or crystallization chamber No. 4, crystallization chamber No. 5, and crystallization chamber No. 6 respectively; a through hole is provided at the lower part of the partition for titanium liquid to pass through; crystallization chamber No. 3 is connected to crystallization chamber No. 4 through a pipeline.

[0008] A rotating shaft is placed horizontally in each crystallization tank, and the rotating shaft passes through three crystallization chambers. A motor is arranged outside the crystallization tank, and the motor is connected to the rotating shaft. A blade is arranged on the rotating shaft in each crystallization chamber, and the blade contacts the cylinder at the bottom of the crystallization chamber.

[0009] An inclined guide plate is provided in the first crystallization chamber, namely the No. 1 crystallization chamber, and the guide plate is located below the discharge port of the spray tower.

[0010] The utility model provides a titanium liquid continuous vacuum crystallizer, which is connected to a vacuum device through a vacuum tube connection port to control the vacuum degree of each crystallization chamber, so that the titanium liquid is cooled in a spray tank and then flows through the crystallizer with gradually increasing vacuum degree. During the process, the titanium liquid crystallizes continuously with high crystallization stability, and the equipment operates uninterruptedly, thereby improving efficiency and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0012] Figure 2 for Figure 1 A partial enlarged schematic diagram. DETAILED DESCRIPTION

[0013] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0014] Example 1:

[0015] like Figure 1 、 Figure 2As shown, the utility model discloses a titanium liquid continuous vacuum crystallizer, including a titanium liquid inlet pipe 1, including six crystallization chambers, which are defined as: No. 1 crystallization chamber 3, No. 2 crystallization chamber 4, No. 3 crystallization chamber 5, No. 4 crystallization chamber 6, No. 5 crystallization chamber 7, No. 6 crystallization chamber 8; No. 1 crystallization chamber 3, No. 2 crystallization chamber 4, No. 3 crystallization chamber 5 are arranged in one crystallization tank, and No. 4 crystallization chamber 6, No. 5 crystallization chamber 7, No. 6 crystallization chamber 8 are arranged in another crystallization tank; the crystallization tank includes a closed cylinder 12, and two partitions 13 are arranged in the cylinder 12 at intervals. The partition 13 divides the interior of the cylinder 12 into three independent cavities, which are No. 1 crystallization chamber 3, No. 2 crystallization chamber 4, No. 3 crystallization chamber 5 or No. 4 crystallization chamber 6, No. 5 crystallization chamber 7, No. 6 crystallization chamber 8 in sequence; the lower part of the partition 13 A through hole 19 is provided for the titanium liquid to pass through; the No. 3 crystallization chamber 5 is connected to the No. 4 crystallization chamber 6 through a pipeline, and a spray tower 2 is provided on the No. 1 crystallization chamber 3, and the spray tower 2 is connected to the No. 1 crystallization chamber 3, and the titanium liquid input pipe 1 is connected to the top of the spray tower 2 and extends to the inside, and a spray head is provided on the titanium liquid input pipe 1 inside the spray tower 2, and a discharge pipe 14 is provided at the lower end of the No. 6 crystallization chamber 8, and the discharge pipe 14 is used to output the crystallized titanium liquid, and a vacuum tube connection port 11 is provided on the top of the spray tower 2 on the No. 1 crystallization chamber 3, and a vacuum tube connection port 11 is provided on the top of the remaining crystallization chambers. The vacuum tube connection port 11 can be connected to a vacuum device through a vacuum tube, which is used to adjust the vacuum degree inside the corresponding crystallization chamber, and a stirring device is provided in each crystallization chamber, and the stirring device is used to scrape off the sediment at the bottom of the crystallization chamber.

[0016] According to the process requirements, the vacuum device adjusts the vacuum degree in crystallization chamber No. 1 3 to crystallization chamber No. 6 8 from low to high, that is, the vacuum degree of crystallization chamber No. 1 3 is the lowest, generally controlled at 5-6KPa, and the vacuum degree of crystallization chamber No. 6 8 is the highest, generally controlled at 1-2KPa.

[0017] During actual operation, the titanium liquid enters the spray tank from the titanium liquid inlet pipe 1, where it is sprayed and cooled in a certain vacuum. It then enters the first crystallization chamber 3, where it passes through a series of crystallization chambers with gradually increasing vacuum levels, where it continues to crystallize. Finally, the crystallized titanium liquid is discharged from the discharge pipe 14 to the separation process. As the vacuum level gradually increases from the first crystallization chamber 3 to the sixth crystallization chamber 8, the temperature of the titanium liquid gradually decreases, achieving continuous crystallization.

[0018] Except for the No. 1 crystallization chamber 3 and the No. 6 crystallization chamber 8, the bottom of the next crystallization chamber is connected to the top of the previous crystallization chamber through a reflux pipe 9, and a reflux pump 10 is provided on the reflux pipe 9.

[0019] A temperature sensor is provided in each crystallization chamber, and the vacuum degree and titanium liquid temperature in each crystallization chamber are pre-set process parameters. In actual operation, if the temperature of the titanium liquid in a certain crystallization chamber is higher than the set temperature parameter, the corresponding reflux pump 10 is started to reflux part of the titanium liquid in the crystallization chamber to the previous crystallization chamber to continue to cool the titanium liquid and continue crystallization. Specifically: Crystallization chamber No. 3 5 is connected to crystallization chamber No. 2 4 through a reflux pipe 9, that is, part of the titanium liquid in crystallization chamber No. 3 5 can be refluxed to crystallization chamber No. 2 4 when necessary; crystallization chamber No. 4 6 is connected to crystallization chamber No. 3 5 through a reflux pipe 9, and crystallization chamber No. 5 7 is connected to crystallization chamber No. 4 6 through a reflux pipe 9.

[0020] This solution can reflux the titanium liquid and cool it down again when the temperature of the titanium liquid in the corresponding crystallization chamber does not meet the requirements and affects the crystallization process, so as to improve the stability and reliability of crystallization.

[0021] A rotating shaft 16 is placed horizontally in each crystallization tank, and the rotating shaft 16 runs through the three crystallization chambers. A motor 15 is arranged outside the crystallization tank, and the motor 15 is transmission-connected to the rotating shaft 16. A blade 17 is provided on the rotating shaft 16 in each crystallization chamber, and the blade 17 is in contact with the cylinder 12 at the bottom of the crystallization chamber.

[0022] Each crystallization tank is equipped with a stirring shaft that passes through the corresponding crystallization chamber. A stirring blade 17 is installed on the stirring shaft in the corresponding crystallization chamber. The stirring blade 17 is used to scrape off the ferrous sulfate that has settled at the bottom of the crystallization chamber, allowing it to flow with the titanium liquid to the next crystallization chamber without causing blockage. Of course, the stirring blade 17 can be spiral in shape, with a forward propulsion force, providing a forward thrust for the titanium liquid to flow, making its flow between the various crystallization chambers smoother and more stable.

[0023] An inclined guide plate 18 is installed in the first crystallization chamber, crystallization chamber 3, below the discharge port of the spray tower 2. The guide plate 18 prevents the titanium liquid in the spray tower 2 from vertically falling into crystallization chamber 3, which would cause titanium liquid splashing. It allows the titanium liquid to enter crystallization chamber 3 more smoothly, avoiding excessive fluctuations that could affect the crystallization process.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to the interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0026] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0027] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simplified modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A titanium liquid continuous vacuum crystallizer, including a titanium liquid inlet pipe, characterized by: It comprises at least two crystallization chambers connected in sequence, the bottoms of adjacent crystallization chambers are connected to each other, a spray tower is provided on the first crystallization chamber, the spray tower is connected to the first crystallization chamber, the titanium liquid input pipe is connected to the top of the spray tower and extends to the inside, a spray head is provided on the titanium liquid input pipe inside the spray tower, a discharge pipe is provided at the lower end of the terminal crystallization chamber, a vacuum tube connection port is provided at the top of the spray tower on the first crystallization chamber, a vacuum tube connection port is provided at the top of the remaining crystallization chambers, a stirring device is provided in each crystallization chamber, and the stirring device is used to scrape off the sediment at the bottom of the crystallization chamber.

2. A titanium liquid continuous vacuum crystallizer according to claim 1, characterized in that: The number of crystallization chambers is 4 or more. Except for the first crystallization chamber and the end crystallization chamber, the two adjacent crystallization chambers are connected to the top of the previous crystallization chamber by a reflux pipe from the bottom of the latter crystallization chamber, and a reflux pump is provided on the reflux pipe.

3. A titanium liquid continuous vacuum crystallizer according to claim 2, characterized in that: The number of crystallization chambers is 6, which are defined as: crystallization chamber No. 1, crystallization chamber No. 2, crystallization chamber No. 3, crystallization chamber No. 4, crystallization chamber No. 5, and crystallization chamber No. 6; Crystallization chamber No. 1, crystallization chamber No. 2, and crystallization chamber No. 3 are arranged in one crystallization tank, and crystallization chamber No. 4, crystallization chamber No. 5, and crystallization chamber No. 6 are arranged in another crystallization tank; the crystallization tank includes a closed cylinder, and two partitions are arranged in the cylinder, and the partitions divide the interior of the cylinder into three independent cavities, which are crystallization chamber No. 1, crystallization chamber No. 2, and crystallization chamber No. 3 or crystallization chamber No. 4, crystallization chamber No. 5, and crystallization chamber No. 6 respectively; a through hole is provided at the lower part of the partition for titanium liquid to pass through; crystallization chamber No. 3 is connected to crystallization chamber No. 4 through a pipeline.

4. A titanium liquid continuous vacuum crystallizer according to claim 3, characterized in that: A rotating shaft is placed horizontally in each crystallization tank, and the rotating shaft passes through three crystallization chambers. A motor is arranged outside the crystallization tank, and the motor is connected to the rotating shaft. A blade is arranged on the rotating shaft in each crystallization chamber, and the blade contacts the cylinder at the bottom of the crystallization chamber.

5. The titanium liquid continuous vacuum crystallizer according to claim 1, characterized in that: An inclined guide plate is provided in the first crystallization chamber and is located below the discharge port of the spray tower.

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