Discharge pipeline assembly and oxygen pressure leaching unit

Abstract

This application relates to the field of hydrometallurgical technology, and in particular to a discharge pipeline assembly and an oxygen pressure leaching device. The discharge pipeline assembly includes a discharge pipeline located outside the oxygen pressure vessel, with its inlet connected to the discharge outlet of the oxygen pressure vessel; and a cooling water pipeline, with its outlet connected to the discharge initiation section of the discharge pipeline, which is located near the discharge outlet of the oxygen pressure vessel. This solves the technical problems of existing leaching solution discharge pipelines being prone to blockage, leading to scaling on the pipeline walls and affecting pipeline operation.

Description

Technical Field

[0001] This application relates to the field of hydrometallurgical technology, and in particular to a discharge pipeline assembly and an oxygen pressure leaching device. Background Technology

[0002] In oxygen pressure leaching units, during the high-temperature, high-pressure, and high-nickel matte oxygen pressure reactor reaction, the existing leaching solution drainage pipeline is prone to blockage, which affects the continuous operation. On the one hand, it can cause scale formation on the pipeline wall, and on the other hand, the precipitation of material products can also affect the operation of the pipeline, and in severe cases, it can cause a shutdown accident. Utility Model Content

[0003] The purpose of this application is to provide a discharge pipeline assembly and an oxygen pressure leaching device to solve the technical problems of existing leachate discharge pipelines being prone to blockage, leading to scaling on the pipeline walls and affecting pipeline operation.

[0004] Firstly, this application provides a discharge pipeline assembly applied to an oxygen pressure vessel, comprising: a discharge pipeline located outside the oxygen pressure vessel, wherein the inlet of the discharge pipeline is connected to the discharge outlet of the oxygen pressure vessel; and

[0005] The cooling water pipeline has its cooling water output end connected to the discharge starting section of the discharge pipeline, which is located near the discharge outlet of the oxygen pressure vessel.

[0006] Furthermore, the discharge pipeline assembly also includes a heat exchange and cooling device installed on the discharge pipeline, wherein the heat exchange and cooling device and the cooling water pipeline are separately and spaced apart on the discharge pipeline.

[0007] Furthermore, the heat exchange cooling device is installed in the downstream section of the discharge pipeline.

[0008] Furthermore, the heat exchange and cooling device includes a shell-and-tube heat exchanger, and a circulating water inlet pipe and a circulating water outlet pipe connected and communicating with the shell-and-tube heat exchanger. The shell-and-tube heat exchanger is sleeved and installed on the outer periphery of the discharge pipe.

[0009] Furthermore, a first temperature detection element is installed on the discharge pipe near the inlet of the heat exchange and cooling device. The first temperature detection element is electrically connected to the control center of the heat exchange and cooling device. When the first temperature detection element detects that the temperature of the discharge pipe reaches a preset temperature range, the heat exchange and cooling device is activated.

[0010] Furthermore, a first shut-off valve is provided on the discharge pipeline near the discharge outlet of the oxygen pressure vessel; and / or

[0011] A second shut-off valve is provided on the discharge pipeline near the outlet end of the heat exchange and cooling device.

[0012] Furthermore, the discharge pipeline is a segmented, detachable pipeline, and the discharge pipeline is composed of multiple detachable segments; and / or

[0013] Multiple supporting and fixing structures are provided at intervals along the extension direction of the outer wall of the discharge pipe.

[0014] Furthermore, the feed inlet of the discharge pipeline is connected to an inner extension pipe that extends into the interior of the oxygen pressure vessel, and the inner extension pipe extends to the lower middle part of the oxygen pressure vessel.

[0015] Furthermore, the discharge pipeline assembly also includes a hot water pipeline connected in parallel with the cooling water pipeline to the discharge starting section of the discharge pipeline.

[0016] Secondly, this application provides an oxygen pressure leaching apparatus, including the discharge pipeline assembly described in any one of the preceding claims, and an oxygen pressure vessel using the discharge pipeline assembly.

[0017] Compared with the prior art, the discharge pipeline assembly and oxygen pressure leaching device provided in this application include a discharge pipeline located outside the oxygen pressure vessel, with its inlet connected to the discharge outlet of the oxygen pressure vessel. A cooling water pipeline is connected to the discharge starting section of the discharge pipeline near the discharge outlet of the oxygen pressure vessel, allowing the leachate just discharged from the oxygen pressure vessel to be directly cooled by the cooling water at the discharge starting section. This enables timely adjustment of the process medium at the material outlet, effectively preventing excessively high leachate temperature and scaling in the discharge pipeline, while also effectively preventing material blockage in the discharge pipeline, ensuring normal operation of the discharge pipeline, reducing the probability of shutdown accidents, and guaranteeing continuous operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the discharge pipeline assembly provided in the embodiments of this application applied to an oxygen pressure vessel.

[0020] Figure label:

[0021] 10-Discharge pipeline;

[0022] 11-Discharge starting section;

[0023] 12-Downstream section;

[0024] 21-Cooling water piping;

[0025] 211 - Cooling water output terminal;

[0026] 22-Hot water pipes;

[0027] 30 - Heat exchange and cooling device;

[0028] 31-Shell-and-tube heat exchanger;

[0029] 311 - Entry point;

[0030] 312 - Export end;

[0031] 32 - Circulating water inlet pipe;

[0032] 33-Circulating water outlet pipe;

[0033] 41-First temperature sensing element;

[0034] 42-Second temperature sensing element;

[0035] 51 - First shut-off valve;

[0036] 52 - Second shut-off valve;

[0037] 60-Inward extension tube;

[0038] 70 - Disassemble the flange;

[0039] 201-Oxygen Pressure Vessel;

[0040] 202-Flash evaporator. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They 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 on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0048] like Figure 1 As shown, this application embodiment provides a discharge pipeline assembly and an oxygen pressure leaching apparatus using the discharge pipeline assembly. The oxygen pressure leaching apparatus may further include an oxygen pressure vessel 201, and the inlet of the discharge pipeline 10 of the discharge pipeline assembly may be connected to the discharge outlet of the oxygen pressure vessel 201; furthermore, the oxygen pressure leaching apparatus may further include a flash tank 202, and the discharge outlet of the discharge pipeline assembly may be connected to the inlet of the flash tank 202 in the next stage of the oxygen pressure leaching process, so that the leaching solution (specifically, high-grade nickel matte leaching solution) leached from the oxygen pressure vessel 201 enters the flash tank 202 in the next stage through the discharge pipeline assembly.

[0049] The discharge pipeline assembly provided in this application includes a discharge pipeline 10 located outside the oxygen pressure vessel 201, the inlet of which is connected to the discharge outlet of the oxygen pressure vessel 201; and a cooling water pipeline 21, the cooling water outlet 211 of which is connected to the discharge starting section 11 of the discharge pipeline 10, the inlet of which is the inlet of the discharge pipeline 10, and the discharge starting section 11 is located near the discharge outlet of the oxygen pressure vessel 201.

[0050] Compared with the prior art, the discharge pipeline assembly and oxygen pressure leaching device provided in this application embodiment include a discharge pipeline 10 located outside the oxygen pressure vessel 201. Its inlet is connected to the discharge outlet of the oxygen pressure vessel 201. The discharge starting section 11 of the discharge pipeline 10 near the discharge outlet of the oxygen pressure vessel 201 is connected to a cooling water pipeline 21. This allows the leachate discharged from the oxygen pressure vessel 201 to be cooled directly by the cooling water in the discharge starting section 11. This can adjust the process medium at the material outlet in a timely manner, effectively prevent the temperature of the discharged leachate from being too high, and prevent scaling and blockage of the discharge pipeline 10. This effectively prevents material blockage in the discharge pipeline 10, ensures the normal operation of the discharge pipeline 10, reduces the probability of shutdown accidents, and ensures continuous operation.

[0051] To further ensure the cooling effect of the leachate in the discharge pipe 10, such as Figure 1 As shown, a heat exchange cooling device 30 can also be installed on the discharge pipe 10. The heat exchange cooling device 30 and the aforementioned cooling water pipe 21 are set separately and at intervals on the discharge pipe 10. In this way, after the leachate of the discharge pipe 10 is cooled by the cooling water introduced in the discharge starting section 11, it can continue to be further cooled and cooled by the heat exchange cooling device 30, so as to achieve a further cooling effect and further effectively prevent scaling and blockage.

[0052] Based on the aforementioned embodiments, the discharge pipeline 10 further includes an upstream section and a downstream section 12 along its discharge direction. The aforementioned discharge starting section 11 is located in the upstream section closer to the discharge outlet of the oxygen pressure vessel 201. Preferably, the aforementioned heat exchange cooling device 30 can be specifically installed in the downstream section 12 of the discharge pipeline 10. This allows for further cooling in the downstream section of the discharge pipeline 10, thereby further controlling the temperature of the leachate about to be discharged from the discharge pipeline 10 and preventing overheated leachate from entering the next stage, such as the flash tank 202, and affecting the reaction in the next stage.

[0053] In one specific embodiment, the aforementioned heat exchange and cooling device 30 may include a shell-and-tube heat exchanger 31, and a circulating water inlet pipe 32 and a circulating water outlet pipe 33 connected and communicating with the shell-and-tube heat exchanger 31. The shell-and-tube heat exchanger 31 is sleeved and installed on the outer periphery of the discharge pipe 10. This shell-and-tube heat exchanger 31 has a more uniform heat exchange and cooling area, faster heat transfer, and better cooling and heat exchange effect.

[0054] More specifically, the shell-and-tube heat exchanger 31 has an inlet port connected to the circulating water inlet pipe 32 and an outlet port connected to the circulating water outlet pipe 33. The inlet port is located near the inlet end 311 of the shell-and-tube heat exchanger 31, and the outlet port is located near the outlet end 312 of the shell-and-tube heat exchanger 31, so as to allow the circulating water to flow through the entire heat exchanger as much as possible, thereby ensuring heat exchange efficiency and heat exchange effect.

[0055] A preferred embodiment is, as follows: Figure 1 As shown, a first temperature detection element 41 may also be installed on the aforementioned discharge pipe 10 near the inlet end 311 of the heat exchange cooling device 30. The first temperature detection element 41 is electrically connected to the control center of the heat exchange cooling device 30. When the first temperature detection element 41 detects that the temperature of the discharge pipe 10 reaches the preset temperature value range, the control center of the heat exchange cooling device 30 automatically controls its start-up.

[0056] In this way, after the leachate in the discharge pipe 10 is cooled by the cooling water introduced at the discharge initiation section 11, its temperature can be measured by the first temperature detection element 41 before it enters the downstream section 12. If the measured temperature is still high and reaches the preset temperature range, the heat exchange cooling device 30 will automatically start for further cooling. Conversely, if the measured temperature is not high and is below the preset temperature range, the heat exchange cooling device 30 will not start, thus saving energy and allowing for more precise control of the leachate discharge temperature. The first temperature detection element 41 can specifically be a temperature sensor.

[0057] An alternative embodiment is, as follows: Figure 1 As shown, a first shut-off valve 51 may be provided on the discharge pipeline 10 near the discharge outlet of the oxygen pressure vessel 201, so that the operation control of opening or closing the discharge pipeline 10 can be performed at the starting position of the discharge pipeline 10 in the first time, which facilitates the automated operation of the pipeline.

[0058] Another alternative embodiment is, as follows: Figure 1As shown, a second shut-off valve 52 may be provided at the outlet end 312 of the aforementioned discharge pipe 10 near the heat exchange cooling device 30 (specifically, a shell-and-tube heat exchanger 31) to facilitate timely opening or closing of the discharge pipe 10 at the end of the discharge pipe 10, and to prevent the discharged material from flowing back into the heat exchange cooling device 30.

[0059] Another preferred embodiment is that the discharge pipeline 10 provided in this application is a segmented, detachable pipeline. The discharge pipeline 10 can be composed of multiple detachable segments, specifically, two adjacent segments can be quickly and detachably connected via a detachable flange 70. This configuration allows for the rapid removal of damaged sections of the discharge pipeline 10, reducing maintenance costs compared to replacing the entire discharge pipeline 10. Furthermore, segmented connections are more convenient, and the segmented pipeline is easier to transport.

[0060] In a further preferred embodiment, at least one segmented connection point is provided at the discharge starting section 11 of the discharge pipeline 10, connected via a disassembly flange 70. This allows for convenient and timely disassembly and replacement or cleaning of the outlet slurry pipeline of the oxygen pressure vessel 201 when it becomes blocked, reducing maintenance and replacement costs and accelerating maintenance and cleaning time.

[0061] An optional embodiment is that multiple supporting and fixing structures (not shown in the figure) are provided at intervals along the extension direction of the outer wall of the discharge pipe 10, which can effectively avoid pipe vibration caused by gas-liquid two-phase flow due to operating conditions and avoid secondary hazards.

[0062] Another preferred embodiment is, as follows: Figure 1 As shown in the embodiment of this application, the inlet of the discharge pipeline 10 is connected to an inner extension pipe 60 extending into the interior of the oxygen pressure vessel 201. The inner extension pipe 60 extends to the lower middle part of the oxygen pressure vessel 201. In this way, the liquid level fluctuation of the oxygen pressure vessel 201 can be reasonably controlled through the inner extension pipe 60 in the oxygen pressure vessel 201, reducing the impact of liquid level fluctuation and further ensuring the continuous and stable operation of production.

[0063] Preferably, the aforementioned inner extension pipe 60 is detachably connected to the inlet of the discharge pipe 10, specifically, a detachable flange connection can also be used. This facilitates the replacement, maintenance, and cleaning of the inner extension pipe 60, reducing maintenance costs.

[0064] Furthermore, such as Figure 1As shown in the embodiments of this application, the discharge pipeline assembly may further include a hot water pipeline 22 connected in parallel with the cooling water pipeline 21 to the discharge starting section 11 of the discharge pipeline 10. When the outlet material medium temperature of the oxygen pressure vessel 201 is too high, and the scaling and crystallization rate is fast, before cooling water can be introduced or before the introduced cooling water can reduce the outlet material medium temperature to below the temperature at which scaling and crystallization will occur, the hot water pipeline 22 can be opened to introduce hot water to remove scale and crystals in time, thus avoiding production interruption. Furthermore, the heat exchange cooling device 30 can be opened simultaneously to introduce circulating water to further remove scale and crystals in time, thus avoiding production interruption. Moreover, this alternating use of hot and cold water can meet the requirements of different process operations and avoid handling various material blockage accidents in the oxygen pressure vessel 201.

[0065] In the aforementioned embodiment, specifically, a second temperature detection element 42 may be provided on the outer wall of the discharge starting section 11 of the discharge pipeline 10. The second temperature detection element 42 is electrically connected to the control valve of the hot water pipeline 22. When the second temperature detection element 42 detects that the temperature of the discharge starting section 11 of the discharge pipeline 10 is too high and reaches the rapid scaling temperature range, the control valve of the hot water pipeline 22 can be automatically opened to introduce hot water for rapid descaling.

[0066] The operation flow of the discharge pipeline assembly provided in this application embodiment can be as follows:

[0067] The high-grade nickel matte leaching solution enters the discharge pipeline 10 from the inner extension pipe 60 located in the oxygen pressure vessel 201. It is first cooled down by the cooling water introduced in the discharge starting section 11 of the discharge pipeline 10, and then enters the shell-and-tube heat exchanger 31 through the detachable segmented pipe. After further cooling and heat exchange in the shell-and-tube heat exchanger 31, it enters the flash tank 202 of the downstream flash evaporation system.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A discharge pipeline assembly, used in an oxygen autoclave, characterized in that, include: A discharge pipeline located outside the oxygen pressure vessel, wherein the inlet of the discharge pipeline is connected to the discharge outlet of the oxygen pressure vessel; and The cooling water pipeline has its cooling water output end connected to the discharge starting section of the discharge pipeline, which is located near the discharge outlet of the oxygen pressure vessel.

2. The discharge pipeline assembly according to claim 1, characterized in that, It also includes a heat exchange and cooling device installed on the discharge pipeline, wherein the heat exchange and cooling device and the cooling water pipeline are separately and spaced apart on the discharge pipeline.

3. The discharge pipeline assembly according to claim 2, characterized in that, The heat exchange cooling device is installed in the downstream section of the discharge pipeline.

4. The discharge pipeline assembly according to claim 3, characterized in that, The heat exchange and cooling device includes a shell-and-tube heat exchanger, and a circulating water inlet pipe and a circulating water outlet pipe connected and communicating with the shell-and-tube heat exchanger. The shell-and-tube heat exchanger is sleeved and installed on the outer periphery of the discharge pipe.

5. The discharge pipeline assembly according to claim 4, characterized in that, A first temperature detection element is also installed on the discharge pipe near the inlet of the heat exchange and cooling device. The first temperature detection element is electrically connected to the control center of the heat exchange and cooling device. When the first temperature detection element detects that the temperature of the discharge pipe reaches a preset temperature range, the heat exchange and cooling device is activated.

6. The discharge pipeline assembly according to any one of claims 2 to 5, characterized in that, A first shut-off valve is provided on the discharge pipeline near the discharge outlet of the oxygen pressure vessel; and / or A second shut-off valve is provided on the discharge pipeline near the outlet end of the heat exchange and cooling device.

7. The discharge pipeline assembly according to any one of claims 1 to 5, characterized in that, The discharge pipeline is a segmented, detachable pipeline, consisting of multiple detachable segments; and / or Multiple supporting and fixing structures are provided at intervals along the extension direction of the outer wall of the discharge pipe.

8. The discharge pipeline assembly according to claim 1, characterized in that, The feed inlet of the discharge pipeline is connected to an inner extension pipe that extends into the interior of the oxygen pressure vessel, and the inner extension pipe extends to the lower middle part of the oxygen pressure vessel.

9. The discharge pipeline assembly according to claim 1, characterized in that, It also includes a hot water pipe that is connected in parallel with the cooling water pipe to the discharge starting section of the discharge pipe.

10. An oxygen pressure leaching apparatus, characterized in that, The invention includes the discharge pipeline assembly according to any one of claims 1 to 9, and the oxygen pressure vessel using the discharge pipeline assembly.

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