A direct freezing crystallization device for titanium dioxide produced by sulfuric acid method
Patent Information
- Application Number
- CN202522299768.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-30
AI Technical Summary
而且由于冷却水温度相对较高，所以造成冷却水波动大，影响钛液结晶效率
[0008]本实用新型所得到的一种硫酸法钛白粉直接冷冻结晶装置，实现多套钛液结晶套件连接一套冷却装置，以降低设备成本，同时利用制冷机的冰水直接冷却低温水，让其温度较低，能对喷淋冷凝器更加稳定的冷却，提升钛液结晶的可靠性。
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Figure CN224792881U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of titanium dioxide processing technology, and in particular to a direct freeze crystallization device for sulfuric acid titanium dioxide. Background Technology
[0002] In existing technologies, the titanium liquid crystallization process requires vacuuming and cooling. Currently, a titanium liquid crystallization kit is connected to a heat exchanger to form a cooling water circulation system. However, due to the relatively high temperature of the cooling water, large fluctuations in cooling water temperature occur, affecting the titanium liquid crystallization efficiency. In addition, each titanium liquid crystallization kit requires a separate cooling device, resulting in high equipment and operating costs. Utility Model Content
[0003] To address the aforementioned technical deficiencies, this invention provides a direct freezing crystallization device for titanium dioxide produced via the sulfuric acid process. Multiple titanium liquid crystallization kits are integrated with a cooling device, and low-temperature chilled water is used to directly cool the crystallizer condenser, thereby improving cooling efficiency.
[0004] This utility model discloses a direct cryogenic crystallization device for titanium dioxide produced by the sulfuric acid process, comprising one or more titanium liquid crystallization kits. Each kit includes a vacuum crystallization tank, a spray condenser, a Roots pump, and a liquid ring pump. It also includes a liquid seal tank. The outlets of the spray condenser, Roots pump, and liquid ring pump are connected to the liquid seal tank via pipes. The bottom of the liquid seal tank is connected to a heat exchanger via a low-temperature water circulation pump. The low-temperature water from the heat exchanger is connected to the spray condenser, Roots pump, and liquid ring pump via pipes. Another outlet of the heat exchanger is connected to a chiller via a pipe. The outlet of the chiller is connected to an intermediate water tank via a pipe. The bottom of the intermediate water tank is connected to the heat exchanger via an ice water circulation pump, forming a loop. The cooling water inlet of the chiller is connected to a circulating water pool via a cooling water pump. A spray tower is installed on the circulating water pool, and the cooling water outlet of the chiller is connected to the spray tower via a pipe.
[0005] The top of the vacuum crystallization tank of the titanium liquid crystallization kit is connected to a demister, which is connected to a spray condenser. The top of the spray condenser is connected in sequence to a first Roots pump, a second Roots pump, and a liquid ring pump through pipes. The first Roots pump, the second Roots pump, and the liquid ring pump are combined to evacuate the spray condenser. The first Roots pump, the second Roots pump, and the liquid ring pump are all connected to a heat exchanger. The outlets of the spray condensation chamber, the first Roots pump, the second Roots pump, and the liquid ring pump are all connected to a liquid seal tank.
[0006] It also includes a first titanium liquid tank, the bottom of which is transported to a vacuum crystallization tank by a first titanium liquid transfer pump; the bottom of the vacuum crystallization tank is connected to a second titanium liquid tank.
[0007] An overflow pipe is installed on the upper side wall of the liquid seal tank.
[0008] The present invention provides a direct freezing crystallization device for sulfuric acid titanium dioxide, which connects multiple titanium liquid crystallization kits to a single cooling device to reduce equipment costs. At the same time, it utilizes the ice water from the chiller to directly cool the low-temperature water, resulting in a lower temperature that provides more stable cooling to the spray condenser and improves the reliability of titanium liquid crystallization. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0010] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0011] Example 1:
[0012] like Figure 1 As shown, this utility model discloses a direct cryogenic crystallization device for titanium dioxide produced by the sulfuric acid process, comprising two sets of titanium liquid crystallization kits 1. Each titanium liquid crystallization kit 1 includes a vacuum crystallization tank 11, a spray condenser 13, and a Roots pump and a liquid ring pump 16. It also includes a liquid seal tank 2. The outlets of the spray condenser 13, the Roots pump, and the liquid ring pump 16 are connected to the liquid seal tank 2 via pipes. The bottom of the liquid seal tank 2 is connected to a heat exchanger 4 via a low-temperature water circulation pump 3. The low-temperature water from the heat exchanger 4 is connected to the spray condenser 13, the Roots pump, and the liquid ring pump 16 via pipes. Another outlet of the heat exchanger 4 is connected to a chiller 5 via a pipe. The outlet of the chiller 5 is connected to an intermediate water tank 9 via a pipe. The bottom of the intermediate water tank 9 is connected to the heat exchanger 4 via an ice water circulation pump 10, forming a loop. The cooling water inlet of the chiller 5 is connected to a circulating water pool 7 via a cooling water pump 6. A spray tower 8 is installed on the circulating water pool 7, and the cooling water outlet of the chiller 5 is connected to the spray tower 8 via a pipe. It also includes a first titanium liquid tank 18, the bottom of which is transported to a vacuum crystallization tank 11 by a first titanium liquid transfer pump 19; the bottom of the vacuum crystallization tank 11 is connected to a second titanium liquid tank 20.
[0013] The top of the vacuum crystallization tank 11 of the titanium liquid crystallization kit 1 is connected to a demister 12, which is connected to a spray condenser 13. The top of the spray condenser 13 is connected to a first Roots pump 14, a second Roots pump 15, and a liquid ring pump 16 in sequence through pipes. The first Roots pump 14, the second Roots pump 15, and the liquid ring pump 16 are combined to evacuate the spray condenser 13. The first Roots pump 14, the second Roots pump 15, and the liquid ring pump 16 are all connected to the heat exchanger 4. The outlets of the spray condensation chamber, the first Roots pump 14, the second Roots pump 15, and the liquid ring pump 16 are all connected to the liquid seal tank 2.
[0014] An overflow pipe 17 is provided on the upper side wall of the liquid seal tank 2.
[0015] The first titanium liquid tank 18, the second titanium liquid tank 20, the vacuum crystallizer 11, the demister 12, the Roots pump, the liquid ring pump 16, and the titanium liquid transfer pump are all existing commercially available products, and those skilled in the art know their specific structures. Therefore, their specific structures will not be described here.
[0016] The first titanium liquid tank 18 stores titanium liquid before crystallization and is transported inward through an external pipeline. The titanium liquid in the first titanium liquid tank 18 is transported to the vacuum crystallization tank 11 of each titanium liquid crystallization kit 1 by the first titanium liquid transfer pump 19. The titanium liquid crystallizes in the vacuum crystallization tank 11, and the demister 12 at the top of the vacuum crystallization tank 11 is used to prevent droplets from being discharged. The gas used for vacuuming is condensed and liquefied in the spray condenser 13 and discharged. The vacuum system uses a first Roots pump 14, a second Roots pump 15, and a liquid ring pump 16 connected in series to achieve vacuuming in the spray condenser 13. In order to achieve rapid condensation in the spray condenser 13, the condensate is directly exchanged with the ice water produced by the refrigerator 5 in the heat exchanger 4 to form low-temperature water. Under normal circumstances, the temperature of the low-temperature water is below 10°C. Using low-temperature water for spray condensation in the spray condenser 13 results in good condensation effect and high stability. Meanwhile, low-temperature water is used to cool the first Roots pump 14, the second Roots pump 15, and the liquid ring pump 16 to ensure stable operation.
[0017] Cooling water from the spray condenser 13, Roots pump, and liquid ring pump 16 is piped to the liquid seal tank 2 for temporary storage and collection. The temperature of the cooling water in the liquid seal tank 2 is relatively high, so it needs to be cooled by the heat exchanger 4 before being delivered to the spray condenser 13, Roots pump, and liquid ring pump 16. The heat exchange medium is ice water produced by the chiller 5. After heat exchange with the cooling water, the cooling water is cooled to a low-temperature state. This low-temperature water is then delivered to the spray condenser 13, resulting in good and stable spray condensation. Direct heat exchange between the cooling water and ice water maintains a relatively stable cooling water temperature. The intermediate water tank 9 effectively controls the ice water temperature, minimizing temperature fluctuations and ensuring a stable and efficient condensation process.
[0018] The cooling of the chiller 5 is achieved by connecting the cooling water pump 6 to the circulating water tank 7, which transports the cooling water in the circulating water tank 7 to the chiller 5. After cooling the chiller 5, the water is then transported to the spray tower 8. After spraying, the temperature of the cooling water is reduced, and the water is then recycled back into the circulating water tank 7.
[0019] An overflow pipe 17 is installed on the liquid seal tank 2 to maintain the liquid level inside, so that the cooling water of the spray condenser 13, Roots pump and liquid ring pump 16 can all enter the liquid seal tank 2, making the whole device operate stably.
[0020] Additionally, the drain pipe 21 at the bottom of the vacuum crystallizer 11 is connected to an external sewage pipe. A cleaning pipe 22 can be installed on the demister 12 to supply clean water for cleaning its interior. The bottom of the demister 12 can be connected to the drain pipe 21 to discharge the cleaning water.
[0021] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0024] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A direct cryogenic crystallization apparatus for sulfuric acid process titanium dioxide, characterized in that: The system includes one or more titanium liquid crystallization kits, each comprising a vacuum crystallization tank, a spray condenser, a Roots pump, and a liquid ring pump. It also includes a liquid seal tank, with the outlets of the spray condenser, Roots pump, and liquid ring pump connected to the liquid seal tank via pipes. The bottom of the liquid seal tank is connected to a heat exchanger via a low-temperature water circulation pump. The low-temperature water from the heat exchanger is connected to the spray condenser, Roots pump, and liquid ring pump via pipes. Another outlet of the heat exchanger is connected to a chiller via a pipe. The outlet of the chiller is connected to an intermediate water tank via a pipe. The bottom of the intermediate water tank is connected to the heat exchanger via an ice water circulation pump, forming a loop. The cooling water inlet of the chiller is connected to a circulating water pool via a cooling water pump. A spray tower is installed on the circulating water pool, and the cooling water outlet of the chiller is connected to the spray tower via a pipe.
2. The apparatus for direct cryogenic crystallization of titanium dioxide using the sulfuric acid process according to claim 1, characterized in that: The top of the vacuum crystallization tank of the titanium liquid crystallization kit is connected to a demister, which is connected to a spray condenser. The top of the spray condenser is connected in sequence to a first Roots pump, a second Roots pump, and a liquid ring pump through pipes. The first Roots pump, the second Roots pump, and the liquid ring pump are combined to evacuate the spray condenser. The first Roots pump, the second Roots pump, and the liquid ring pump are all connected to a heat exchanger. The outlets of the spray condensation chamber, the first Roots pump, the second Roots pump, and the liquid ring pump are all connected to a liquid seal tank.
3. The apparatus for direct cryogenic crystallization of titanium dioxide using the sulfuric acid process according to claim 2, characterized in that: It also includes a first titanium liquid tank, the bottom of which is transported to a vacuum crystallization tank by a first titanium liquid transfer pump; the bottom of the vacuum crystallization tank is connected to a second titanium liquid tank.
4. The apparatus for direct cryogenic crystallization of titanium dioxide using the sulfuric acid process according to claim 1, characterized in that: An overflow pipe is installed on the upper side wall of the liquid seal tank.