A rapid unblocking cryogenic crystallization magnesium removal system

Abstract

This application relates to a rapid unblocking cryogenic crystallization magnesium removal system, belonging to the field of smelting equipment technology. This rapid unblocking cryogenic crystallization magnesium removal system includes: a multi-stage crystallization device, a cooling tower, and a centrifuge. The solution provided in this application, by setting up an unblocking pipeline, allows uncooled waste electrolyte to be directly discharged into the crystallization tank when crystallization occurs on the inner wall of the crystallization tank. This is achieved by controlling the closure of the first input valve, the opening of the second input valve, the unblocking input pump, and the unblocking valve. The high temperature of the waste electrolyte dissolves the crystals, and the system's own heat source enables rapid unblocking, avoiding the safety risks of traditional manual cleaning. This ensures continuous production while maintaining a high magnesium removal rate during the production process.

Description

Technical Field

[0001] This application relates to the field of smelting equipment technology, and in particular to a cryogenic crystallization magnesium removal system that can quickly clear blockages. Background Technology

[0002] Magnesium is a common associated impurity element in zinc concentrate and one of the main impurity ions that are difficult to purify and separate in hydrometallurgical zinc refining. Because magnesium continuously accumulates in the hydrometallurgical system, the lack of an effective open circuit causes problems such as crystallization blockage, decreased current efficiency, and increased energy consumption in normal production.

[0003] The currently used wet zinc smelting waste electrolyte freeze crystallization magnesium removal technology is a physical removal method that does not add any reagents. Its principle is to control the solution properties through temperature changes, directly crystallizing and separating magnesium from the waste electrolyte to form granular magnesium sulfate crystals. The magnesium-removed solution is then returned to the electrolyte preparation for recycling. The freeze crystallization magnesium removal process does not add external reagents, introduces no impurity ions, requires no neutralization reaction, and produces no waste residue or wastewater containing heavy metals, thus avoiding the loss of zinc and sulfuric acid.

[0004] The current cryogenic crystallization magnesium removal system removes magnesium by cooling the waste electrolyte and then allowing it to cool and crystallize naturally through a crystallization tank. However, during operation, crystallization occurs on the inner wall of the crystallization tank, leading to a decrease in cooling and crystallization efficiency, and consequently, a decrease in the magnesium removal rate. Therefore, to ensure the magnesium removal rate, the system needs to be shut down periodically for crystallization tank cleaning. This not only affects production efficiency but also carries high safety risks due to the manual cleaning method. Utility Model Content

[0005] To address or partially address the problems existing in related technologies, this application provides a rapid unblocking cryogenic crystallization magnesium removal system that can utilize the system's own heat source to achieve rapid unblocking, avoiding the safety risks of traditional manual cleaning, and ensuring the magnesium removal rate during the production process while guaranteeing continuous production.

[0006] This application provides a rapid unblocking cryogenic crystallization magnesium removal system, comprising: a multi-stage crystallization device, a cooling tower, and a centrifuge; The multi-stage crystallization device consists of several crystallization tanks connected in stages by overflow pipes. Each crystallization tank is equipped with an agitator and a discharge pipe is installed at the bottom of each crystallization tank. The discharge pipe is connected to the centrifuge and a centrifugal input pump is installed at the input port of the centrifuge. The input end of the cooling tower is connected to the external waste electrolyte pipeline through a pipe. A first input valve is installed at the input end of the cooling tower, and the output end of the cooling tower is connected to the first-stage crystallization tank through a pipe. The external waste electrolyte pipeline is connected to each crystallization tank through a blockage-clearing pipeline. A second input valve and a blockage-clearing input pump are installed at the front end of the blockage-clearing pipeline, and a blockage-clearing valve is installed on the pipeline connecting the blockage-clearing pipeline and each crystallization tank. The centrifuge's liquid outlet is connected to the first-stage crystallization tank via a pipe, and the centrifuge's discharge outlet is connected to the collection tank via a pipe.

[0007] Optionally, in some embodiments of this application: An observation port is installed on the overflow pipe, and observation baffles are installed around the observation port.

[0008] Optionally, in some embodiments of this application: The observation port is equipped with a liquid level sensor and a temperature sensor.

[0009] Optionally, in some embodiments of this application: The discharge pipes of the crystallization tank are all equipped with discharge valves.

[0010] Optionally, in some embodiments of this application: The cryo-crystallization magnesium removal system also includes: a controller; The controller establishes electrical connections with the agitators, cooling towers, centrifuges, centrifugal input pumps, first input valves, second input valves, unblocking input pumps, various unblocking valves, level sensors, temperature sensors, and various discharge valves in each crystallization tank.

[0011] The technical solution provided in this application may include the following beneficial effects: This application utilizes a cooling tower to pre-cool the waste electrolyte before it enters the first-stage crystallization tank. The electrolyte then flows sequentially through six crystallization tanks via an overflow pipe. Controlled stirring achieves efficient cooling and crystallization of the waste electrolyte. Simultaneously, a blockage-clearing pipe is installed. When crystals form on the inner wall of the crystallization tank, the uncooled waste electrolyte is directly discharged into the crystallization tank by controlling the closure of the first input valve, the opening of the second input valve, the blockage-clearing input pump, and the blockage-clearing valve. The high temperature of the waste electrolyte dissolves the crystals, and the system's own heat source enables rapid blockage clearing, avoiding the safety risks of traditional manual cleaning. This ensures continuous production while maintaining a high magnesium removal rate during the production process.

[0012] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0013] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0014] Figure 1 This is a schematic diagram of a frozen crystallization magnesium removal system in an embodiment of this application; Figure 2 This is a schematic diagram of a control structure of the controller in an embodiment of this application.

[0015] Reference numerals in the attached drawings: 1-Multi-stage crystallization device, 101-Crystallization tank, 102-Overflow pipe, 1021-Observation baffle, 103-Agitator, 104-Discharge pipe, 105-Discharge valve, 106-Centrifugal input pump, 2-Cooling tower, 201-First input valve, 3-Centrifuge, 4-Collection tank, 5-External waste electrolyte pipe, 501-Unblocking pipe, 502-Second input valve, 503-Unblocking input pump, 504-Unblocking valve, 6-Level sensor, 7-Temperature sensor, 8-Controller. Detailed Implementation

[0016] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0017] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "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.

[0018] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are 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.

[0019] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction 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.

[0020] The current cryogenic crystallization magnesium removal system removes magnesium by cooling the waste electrolyte and then allowing it to cool and crystallize naturally through a crystallization tank. However, during operation, crystallization occurs on the inner wall of the crystallization tank, leading to a decrease in cooling and crystallization efficiency, and consequently, a decrease in the magnesium removal rate. Therefore, to ensure the magnesium removal rate, the system needs to be shut down periodically for crystallization tank cleaning. This not only affects production efficiency but also carries high safety risks due to the manual cleaning method.

[0021] To address the aforementioned issues, this application provides a cryogenic crystallization magnesium removal system capable of rapid unblocking. This system utilizes its own heat source to achieve rapid unblocking, avoiding the safety risks associated with traditional manual cleaning, and ensuring continuous production while maintaining a high magnesium removal rate during the production process.

[0022] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of a frozen crystallization magnesium removal system in an embodiment of this application; Figure 2 This is a schematic diagram of a control structure of the controller in an embodiment of this application.

[0024] See Figure 1-2 A rapid unblocking cryogenic crystallization magnesium removal system includes: a multi-stage crystallization device 1, a cooling tower 2, and a centrifuge 3.

[0025] The multi-stage crystallization device 1 consists of six crystallization tanks 101 connected in stages via overflow pipes 102. Each crystallization tank 101 is equipped with a stirrer 103, and each crystallization tank 101 has a discharge pipe 104 at its bottom, which is connected to the centrifuge 3. A centrifugal input pump 106 is installed at the input port of the centrifuge 3. The multi-stage crystallization device 1 comprises six crystallization tanks 101 connected in stages from left to right.

[0026] The input end of the cooling tower 2 is connected to the external waste electrolyte pipeline 5 through a pipe. A first input valve 201 is installed at the input end of the cooling tower 2. The output end of the cooling tower 2 is connected to the first-stage crystallization tank 101 through a pipe.

[0027] In this embodiment, by setting up a cooling tower 2, the waste electrolyte is pre-cooled by the cooling tower 2 and then enters the first-stage crystallization tank 101. Subsequently, it flows through six crystallization tanks 101 in sequence through the overflow pipe 102. After controlled stirring, the waste electrolyte is efficiently cooled and crystallized.

[0028] The external waste electrolyte pipeline 5 is connected to each crystallization tank 101 through the unblocking pipeline 501. A second input valve 502 and an unblocking input pump 503 are installed at the front end of the unblocking pipeline 501. An unblocking valve 504 is installed on the pipeline connecting the unblocking pipeline 501 and each crystallization tank 101.

[0029] In this embodiment, by setting up a blockage-clearing pipe 501, when crystals form on the inner wall of the crystallization tank 101, the uncooled waste electrolyte is directly discharged into the crystallization tank 101 by controlling the closure of the first input valve 201, the opening of the second input valve 502, the blockage-clearing input pump 503, and the blockage-clearing valve 504. The high temperature of the waste electrolyte dissolves the crystals, and the system's own heat source is used to achieve rapid blockage clearing, avoiding the safety risks of traditional manual cleaning. This ensures continuous production while maintaining the magnesium removal rate during the production process.

[0030] The liquid outlet of the centrifuge 3 is connected to the first-stage crystallization tank 101 via a pipe, and the material outlet of the centrifuge 3 is connected to the collection tank 4 via a pipe.

[0031] Specifically, each of the discharge pipes 104 of the crystallization tank 101 is equipped with a discharge valve 105.

[0032] In this embodiment, after stirring for a certain period of time, the discharge valve 105 is opened and the centrifuge 3 is controlled to separate the crystals, which are then collected uniformly through the collection tank 4.

[0033] Specifically: The overflow pipe 102 is provided with an observation port, and observation baffles 1021 are provided around the observation port.

[0034] Specifically: a liquid level sensor 6 and a temperature sensor 7 are installed at the observation port.

[0035] In this embodiment, by setting an overflow port, it is convenient to manually observe the crystallization of the waste electrolyte. At the same time, by setting a liquid level sensor 6 and a temperature sensor 7, the overflow height and the temperature of the waste electrolyte can be detected in real time, ensuring the safety of production and the crystallization situation.

[0036] Specifically: the freeze crystallization magnesium removal system also includes: controller 8; The controller 8 establishes electrical connections with the agitator 103, cooling tower 2, centrifuge 3, centrifugal input pump 106, first input valve 201, second input valve 502, unblocking input pump 503, various unblocking valves 504, liquid level sensor 6, temperature sensor 7 and various discharge valves 105 in each crystallization tank 101.

[0037] In this embodiment, the controller 8 is a PLC controller 8. Unified control is achieved through the controller 8 to realize automated operation and improve production efficiency.

[0038] The technical solutions provided in this application have the following beneficial effects: This application incorporates a cooling tower 2, through which the waste electrolyte is pre-cooled before entering the first-stage crystallization tank 101. It then flows sequentially through six crystallization tanks 101 via an overflow pipe 102. After controlled stirring, efficient cooling and crystallization of the waste electrolyte are achieved. Simultaneously, a clearing pipe 501 is installed. When crystallization occurs on the inner wall of the crystallization tank 101, the uncooled waste electrolyte is directly discharged into the crystallization tank 101 by controlling the closure of the first input valve 201, the opening of the second input valve 502, the clearing input pump 503, and the clearing valve 504. The high temperature of the waste electrolyte dissolves the crystals, and the system's own heat source enables rapid clearing, avoiding the safety risks of traditional manual cleaning. This ensures continuous production while maintaining the magnesium removal rate during the production process.

[0039] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0040] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0041] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0042] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A rapid unblocking cryogenic crystallization magnesium removal system, characterized in that, include: Multi-stage crystallization device (1), cooling tower (2) and centrifuge (3); The multi-stage crystallization device (1) is composed of several crystallization tanks (101) connected in stages through overflow pipes (102). A stirrer (103) is provided in each crystallization tank (101), and a discharge pipe (104) is provided at the bottom of each crystallization tank (101). The discharge pipe (104) is connected to the centrifuge (3), and a centrifugal input pump (106) is provided at the input port of the centrifuge (3). The input end of the cooling tower (2) is connected to the external waste electrolyte pipeline (5) through a pipeline. A first input valve (201) is installed at the input end pipeline of the cooling tower (2). The output end of the cooling tower (2) is connected to the first-stage crystallization tank (101) through a pipeline. The external waste electrolyte pipeline (5) is connected to each crystallization tank (101) through the unblocking pipeline (501). A second input valve (502) and an unblocking input pump (503) are provided at the front end of the unblocking pipeline (501). An unblocking valve (504) is provided on the pipeline connecting the unblocking pipeline (501) and each crystallization tank (101). The outlet of the centrifuge (3) is connected to the first-stage crystallization tank (101) through a pipe, and the outlet of the centrifuge (3) is connected to the collection tank (4) through a pipe.

2. The rapid unblocking cryogenic crystallization magnesium removal system according to claim 1, characterized in that: An observation port is provided on the overflow pipe (102), and an observation baffle (1021) is provided around the observation port.

3. The rapid unblocking cryogenic crystallization magnesium removal system according to claim 2, characterized in that: A liquid level sensor (6) and a temperature sensor (7) are installed at the location of the observation port.

4. The rapid unblocking cryogenic crystallization magnesium removal system according to claim 1 or 3, characterized in that: Each of the crystallization tanks (101) has a discharge valve (105) installed on its discharge pipe (104).

5. The rapid unblocking cryogenic crystallization magnesium removal system according to claim 4, characterized in that: The frozen crystallization magnesium removal system also includes: a controller (8); The controller (8) establishes electrical connections with the agitator (103), cooling tower (2), centrifuge (3), centrifugal input pump (106), first input valve (201), second input valve (502), unblocking input pump (503), various unblocking valves (504), liquid level sensor (6), temperature sensor (7) and various discharge valves (105) in each crystallization tank (101).

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