A device for removing heavy metals from manganese sulfate solution by using sodium sulfide solution

Abstract

The utility model discloses a kind of heavy metal removal devices of manganese sulfate solution using sodium sulfide solution, it is related to solution processing technical field.The utility model includes sodium sulfide dissolving unit, and heavy metal removal unit of reaction with manganese sulfate solution, filter unit and connecting pipeline system;Sodium sulfide dissolving unit includes sodium sulfide dissolving tank, sodium sulfide solution filter and sodium sulfide solution metering pump connected in turn;Heavy metal removal unit of reaction with manganese sulfate solution includes the closed heavy metal removal reaction barrel of being equipped with sodium sulfide solution delivery pipeline spray head, heavy metal removal reaction barrel thermometer, heavy metal removal reaction barrel pH meter and heavy metal removal reaction barrel stirrer.This utility model obtains sodium sulfide solution by dissolving sodium sulfide, and the heavy metal of manganese sulfate solution is removed by adding sodium sulfide solution, avoid directly entering solid sodium sulfide cannot thoroughly react with heavy metal, lead to sodium sulfide utilization rate is low, and heavy metal removal efficiency is low and other disadvantages.

Description

Technical Field

[0001] This utility model relates to the field of solution treatment technology, specifically to a device for removing heavy metals from manganese sulfate solution using sodium sulfide solution. Background Technology

[0002] In the process of removing heavy metals such as cobalt, nickel, and zinc from manganese sulfate solution, various sulfiding agents such as sodium sulfide, barium sulfide, sodium hydrosulfide, ammonium sulfide, and SDD are used. However, when using barium sulfide, a large amount of heavy metal slag is produced, and the heavy metal content of the slag is low, making it difficult to sell and process. When using sodium hydrosulfide and ammonium sulfide, the reaction pH is relatively low, leading to the generation of hydrogen sulfide gas, which poses a hazard to personnel and the environment. SDD is also expensive, resulting in high costs for heavy metal removal. In contrast, when using sodium sulfide, the reaction pH is relatively high, virtually no hydrogen sulfide is produced, and the amount of heavy metal slag produced is small, with a high heavy metal content, making it easy to sell and process. Furthermore, sodium sulfide is inexpensive. Therefore, sodium sulfide has become the main process for heavy metal removal from manganese sulfate solution. Existing processes for removing heavy metals such as cobalt, nickel, and zinc using manganese sulfate solution mainly involve directly adding solid sodium sulfide to a heavy metal removal reaction tank. This process is relatively simple, consisting mainly of a heavy metal removal reaction tank, a stirring device, a sodium sulfide feeding device, a heavy metal removal filter pump, a heavy metal removal filter press, and a qualified manganese sulfate solution storage tank. However, existing methods have drawbacks. Firstly, some of the solid sodium sulfide reacts directly with manganese sulfate to form manganese sulfide, resulting in the loss of both sodium sulfide and manganese. Secondly, the addition of solid sodium sulfide is uneven, preventing uniform reaction with heavy metals and leading to low sodium sulfide utilization and low heavy metal removal efficiency. Thirdly, the rapid addition of solid sodium sulfide results in incomplete reaction with heavy metals, leading to high sodium sulfide consumption and high costs. Furthermore, when sodium sulfide is added directly to the reaction tank, the lack of a sealed environment can generate toxic hydrogen sulfide, posing significant hazards to personnel and the environment.

[0003] Therefore, a device for removing heavy metals from manganese sulfate solution using sodium sulfide solution is proposed. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a device for removing heavy metals from manganese sulfate solution using sodium sulfide solution.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A device for removing heavy metals from manganese sulfate solution using sodium sulfide solution includes a sodium sulfide dissolution unit, a heavy metal removal unit by reacting with manganese sulfate solution, a filter press unit, and a connecting pipeline system.

[0007] The sodium sulfide dissolving unit comprises a sodium sulfide dissolving tank, a sodium sulfide solution filter, and a sodium sulfide solution metering pump connected in sequence.

[0008] The heavy metal removal unit that reacts with manganese sulfate solution includes a sealed heavy metal removal reaction tank equipped with a sodium sulfide solution delivery pipeline nozzle, a heavy metal removal reaction tank thermometer, a heavy metal removal reaction tank pH meter, and a heavy metal removal reaction tank stirrer.

[0009] The filter press unit includes a heavy metal removal reaction tank and a heavy metal removal filter press connected by a heavy metal removal filter press pump, as well as a filtrate storage tank.

[0010] The connecting pipeline system includes tap water pipelines and valves, sodium sulfide solution conveying pipelines and valves, manganese sulfate solution pipelines and valves, heavy metal removal pressure filter pipelines, and heavy metal removal pressure filter liquid pipelines.

[0011] Furthermore, the sodium sulfide dissolving unit also includes: a sodium sulfide dissolving tank agitator and a sodium sulfide dissolving tank level gauge disposed on the sodium sulfide dissolving tank.

[0012] Furthermore, the nozzle of the sodium sulfide solution delivery pipeline is connected to the output end pipeline of the sodium sulfide solution metering pump, and is positioned above the heavy metal removal reaction tank. A sodium sulfide solution delivery pipeline flow meter is installed on the output end pipeline of the sodium sulfide solution metering pump.

[0013] Furthermore, the heavy metal removal reaction tank is equipped with a heavy metal removal reaction tank sampling port and a heavy metal removal reaction tank breathing valve. The heavy metal removal reaction tank sampling port is used to sample, detect, and analyze the reaction status and data of the heavy metal removal reaction process. The heavy metal removal reaction tank breathing valve is used to maintain the air pressure in the heavy metal removal reaction tank during the heavy metal removal process.

[0014] Furthermore, the heavy metal removal reaction tank and the heavy metal removal filtrate storage tank are respectively equipped with a heavy metal removal reaction tank level gauge and a heavy metal removal filtrate storage tank level gauge.

[0015] Furthermore, a flow meter for the heavy metal removal filter press is installed on the heavy metal removal filter press pipeline. One end of the heavy metal removal filter press pipeline is connected to the output end pipeline of the heavy metal removal filter press pump, and the other end is connected to the input end of the heavy metal removal filter press.

[0016] Furthermore, the tap water pipe and valve are used for conveying tap water to the sodium sulfide dissolving tank; the sodium sulfide solution conveying pipe and valve are used for conveying sodium sulfide solution from the sodium sulfide dissolving tank to the heavy metal removal reaction tank; the manganese sulfate solution pipe and valve are used for conveying manganese sulfate solution to the heavy metal removal reaction tank; the heavy metal removal filter press pipe is used for conveying heavy metal removal slurry from the heavy metal removal reaction tank to the heavy metal removal filter press; and the heavy metal removal filter press pipe is used for conveying manganese sulfate filter press liquid from the heavy metal removal filter press to the heavy metal removal filter press liquid storage tank.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention involves dissolving sodium sulfide to obtain a sodium sulfide solution. The sodium sulfide solution is then used to remove heavy metals from manganese sulfate solution. This avoids the drawbacks of directly adding solid sodium sulfide, which may not react completely with heavy metals, resulting in low sodium sulfide utilization and low heavy metal removal efficiency. By using a metering pump with interlocking flow rates, the amount and speed of sodium sulfide added can be controlled, improving utilization, reducing the amount of sodium sulfide used, and increasing the reaction efficiency for heavy metal removal. Adding the sodium sulfide solution to the manganese sulfate solution via spraying allows for uniform reaction between the sodium sulfide and the heavy metals in the manganese sulfate solution, improving utilization and removal efficiency, reducing the drawback of direct reaction between sodium sulfide and manganese sulfate to form manganese sulfide, and also reducing manganese loss. Using sodium sulfide solution under closed conditions to remove heavy metals from manganese sulfate solution avoids the drawbacks of adding sodium sulfide to heavy metal removal tanks, which produces toxic hydrogen sulfide that poses a significant hazard to personnel and the environment. Attached Figure Description

[0019] Figure 1 This is a diagram of the equipment and process apparatus of this utility model.

[0020] Figure labels: 1. Water supply pipe and valve; 2. Sodium sulfide dissolving tank agitator; 3. Sodium sulfide dissolving tank level gauge; 4. Sodium sulfide dissolving tank; 5. Sodium sulfide solution filter; 6. Sodium sulfide solution metering pump; 7. Sodium sulfide solution delivery pipeline flow meter; 8. Sodium sulfide solution delivery pipeline and valve; 9. Sodium sulfide solution delivery pipeline nozzle; 10. Heavy metal removal reaction tank thermometer; 11. Heavy metal removal reaction tank pH meter; 12. Heavy metal removal reaction tank sampling port; 13. Manganese sulfate solution pipe and valve; 14. Heavy metal removal reaction tank agitator; 15. Heavy metal removal reaction tank breather valve; 16. Heavy metal removal reaction tank level gauge; 17. Heavy metal removal reaction tank; 18. Heavy metal removal filter press pump; 19. Heavy metal removal filter press pipeline flow meter; 20. Heavy metal removal filter press pipeline; 21. Heavy metal removal filter press; 22. Heavy metal removal filter press liquid pipeline; 23. Heavy metal removal filter press liquid storage tank. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals 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. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0025] like Figure 1As shown, a device for removing heavy metals from manganese sulfate solution using sodium sulfide solution includes a sodium sulfide dissolution unit, a heavy metal removal unit reacting with manganese sulfate solution, a filter press unit, and a connecting pipeline system. The sodium sulfide dissolution unit comprises a sodium sulfide dissolution tank 4, a sodium sulfide solution filter 5, and a sodium sulfide solution metering pump 6 connected in sequence. The sodium sulfide solution filter 5 filters impurities and coarse particles from the sodium sulfide solution, preventing them from clogging the sodium sulfide solution delivery pipeline nozzle 9 and affecting the normal addition of sodium sulfide solution and the heavy metal removal effect. The sodium sulfide solution is delivered to the heavy metal removal reaction tank via the sodium sulfide solution metering pump 6 for heavy metal removal. The heavy metal removal unit reacting with manganese sulfate solution includes a sodium sulfide solution delivery pipeline nozzle 9, a heavy metal removal reaction tank thermometer 10, and a heavy metal removal reaction tank pH meter. The sealed heavy metal removal reaction tank 17 includes a stirrer 14 and a thermometer 10 and a pH meter 11, which are used to record the reaction temperature and pH value of the heavy metal removal reaction tank, respectively. Sodium sulfide solution is sprayed into the heavy metal removal reaction tank 17 through a nozzle 9 of a sodium sulfide solution delivery pipe to react uniformly with the heavy metals in the manganese sulfate solution, thereby improving the heavy metal removal effect of the sodium sulfide solution and reducing the use of sodium sulfide. The filter press unit includes the heavy metal removal reaction tank 17, the heavy metal removal filter press 21, and the filtrate storage tank 23, which are connected by a heavy metal removal filter press pump 18. The connecting pipeline system includes a tap water pipe and valve 1, a sodium sulfide solution delivery pipe and valve 8, a manganese sulfate solution pipe and valve 13, a heavy metal removal filter press pipe 20, and a heavy metal removal filtrate pipe 22.

[0026] like Figure 1 As shown, the sodium sulfide dissolving unit also includes: a sodium sulfide dissolving tank agitator 2 and a sodium sulfide dissolving tank level gauge 3 installed on the sodium sulfide dissolving tank 4; specifically, the sodium sulfide dissolving tank agitator 2 can accelerate the dissolution rate of sodium sulfide and ensure that the concentration of sodium sulfide solution is uniformly stirred, and the sodium sulfide dissolving tank level gauge 3 can obtain the liquid level of the sodium sulfide dissolving tank 4 in a timely manner, and control the amount of tap water added through the liquid level to ensure the prepared concentration of sodium sulfide.

[0027] like Figure 1 As shown, the nozzle 9 of the sodium sulfide solution delivery pipeline is connected to the output pipe of the sodium sulfide solution metering pump 6, and is positioned above the heavy metal removal reaction tank 17. A flow meter 7 of the sodium sulfide solution delivery pipeline is installed on the output pipe of the sodium sulfide solution metering pump 6. Specifically, the sodium sulfide solution is delivered to the heavy metal removal reaction tank 17 through the sodium sulfide solution metering pump 6 for heavy metal removal. The opening degree of the sodium sulfide solution metering pump 6 is controlled by the value of the flow meter 7 and interlocked to avoid the sodium sulfide solution being added too quickly, generating manganese sulfide, which affects the heavy metal removal effect of the sodium sulfide solution, and the sodium sulfide solution being added too slowly, which reduces the heavy metal removal efficiency.

[0028] like Figure 1 As shown, the heavy metal removal reaction tank 17 is equipped with a heavy metal removal reaction tank sampling port 12 and a heavy metal removal reaction tank breather valve 15. The heavy metal removal reaction tank sampling port 12 is used for sampling, detection and analysis of the reaction status and data of the heavy metal removal reaction process. The heavy metal removal reaction tank breather valve 15 is used to maintain the air pressure of the heavy metal removal reaction tank 17 during the heavy metal removal process. Specifically, because the heavy metal removal reaction tank 17 is a closed container, it is necessary to maintain the pressure of the heavy metal removal reaction tank 17 during the heavy metal removal process through the heavy metal removal reaction tank breather valve 15.

[0029] like Figure 1 As shown, a heavy metal removal reaction tank 17 and a heavy metal removal filtrate storage tank 23 are respectively equipped with a heavy metal removal reaction tank level gauge 16 and a heavy metal removal filtrate storage tank level gauge; specifically, the liquid levels of the heavy metal removal reaction tank 17 and the heavy metal removal filtrate storage tank 23 can be observed through the heavy metal removal reaction tank level gauge 16 and the heavy metal removal filtrate storage tank level gauge, respectively.

[0030] like Figure 1 As shown, a heavy metal removal filter press pipe 20 is equipped with a heavy metal removal filter press pipe flow meter 19. One end of the heavy metal removal filter press pipe 20 is connected to the output end pipe of the heavy metal removal filter press pump 18, and the other end is connected to the input end of the heavy metal removal filter press 21. Specifically, the heavy metal removal filter press pipe flow meter 19 is used to record the heavy metal removal filter press speed.

[0031] like Figure 1As shown, the tap water pipe and valve 1 are used to transport tap water to the sodium sulfide dissolving tank 4; the sodium sulfide solution transport pipe and valve 8 are used to transport the sodium sulfide solution from the sodium sulfide dissolving tank 4 to the heavy metal removal reaction tank 17; the manganese sulfate solution pipe and valve 13 are used to transport the manganese sulfate solution to the heavy metal removal reaction tank 17; the heavy metal removal filter press pipe 20 is used to transport the heavy metal removal slurry from the heavy metal removal reaction tank 17 to the heavy metal removal filter press 21; and the heavy metal removal filter press liquid pipe 22 is used to transport the manganese sulfate filter press liquid from the heavy metal removal filter press 21 to the heavy metal removal filter press liquid storage tank 23. Specifically, tap water enters the sodium sulfide dissolving tank 4 through the tap water pipe and valve 1. Sodium sulfide is dissolved in the solution, and the dissolved sodium sulfide solution is transported to the heavy metal removal reaction tank 17 by the sodium sulfide solution metering pump 6. Manganese sulfate solution is added to the heavy metal removal reaction tank 17 through the manganese sulfate solution pipeline and valve 13. After the manganese sulfate solution completes the heavy metal removal, it is transported to the heavy metal removal filter press 21 by the heavy metal removal filter press pump 18 for filtration. After filtration, the manganese sulfate filter liquid enters the heavy metal removal filter liquid storage tank 23 through the heavy metal removal filter liquid pipeline 22 for storage, providing qualified manganese sulfate solution for the next manganese sulfate crystallization process. All electrical components involved are electrically connected to the controller to form a complete control system.

[0032] Working principle:

[0033] 1. Sodium sulfide dissolution unit: Tap water enters the sodium sulfide dissolution tank 4 through the tap water pipe and valve 1. Under the action of the agitator 2 in the sodium sulfide dissolution tank, the dissolution of sodium sulfide is accelerated. The liquid level gauge 3 in the sodium sulfide dissolution tank monitors the liquid level to ensure uniform solution concentration. The dissolved sodium sulfide solution is filtered by filter 5 to remove impurities. Then, the flow rate is precisely controlled by the sodium sulfide solution metering pump 6 and the sodium sulfide solution delivery pipeline flow meter 7. The solution is delivered to the sodium sulfide solution delivery pipeline nozzle 9 through the sodium sulfide solution delivery pipeline and valve 8 and sprayed into the heavy metal removal reaction tank 17.

[0034] 2. Heavy metal removal reaction unit: Manganese sulfate solution enters the sealed heavy metal removal reaction tank 17 through the manganese sulfate solution pipeline and valve 13, and is fully mixed with the sprayed sodium sulfide solution under the action of the heavy metal removal reaction tank stirrer 14, so that the heavy metals form sulfide precipitates. The heavy metal removal reaction tank thermometer 10 and heavy metal removal reaction tank pH meter 11 monitor the reaction conditions in real time. The heavy metal removal reaction tank sampling port 12 is used to detect the reaction status. The heavy metal removal reaction tank breather valve 15 maintains the pressure balance inside the tank. The heavy metal removal reaction tank level gauge 16 monitors the solution level.

[0035] 3. Filtration Separation Unit: After the reaction is completed, the slurry is transported by the heavy metal removal filter pump 18 through the heavy metal removal filter pipeline 20 to the heavy metal removal filter press 21 for solid-liquid separation. The flow meter 19 of the heavy metal removal filter pipeline records the filtration speed. The filtrate after filtration enters the heavy metal removal filter storage tank 23 through the heavy metal removal filter pipeline 22 for storage and use in subsequent processes. Meanwhile, the heavy metal sulfide residue is filtered out, thus purifying the manganese sulfate solution.

[0036] The entire process utilizes automated control of sodium sulfide dosage, reaction conditions, and filtration speed to ensure efficient impurity removal while reducing sodium sulfide consumption and improving the purity of the manganese sulfate solution.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for removing heavy metals from manganese sulfate solution using sodium sulfide solution, characterized in that: Bag It includes a sodium sulfide dissolution unit, a heavy metal removal unit that reacts with manganese sulfate solution, a pressure filtration unit, and a connecting pipeline system; The sodium sulfide dissolving unit includes a sodium sulfide dissolving tank (4), a sodium sulfide solution filter (5), and a sodium sulfide solution metering pump (6) connected in sequence. The heavy metal removal unit that reacts with manganese sulfate solution includes a sealed heavy metal removal reaction tank (17) equipped with a sodium sulfide solution delivery pipe nozzle (9), a heavy metal removal reaction tank thermometer (10), a heavy metal removal reaction tank pH meter (11), and a heavy metal removal reaction tank stirrer (14). The filter press unit includes a heavy metal removal reaction tank (17) and a heavy metal removal filter press (21) connected by a heavy metal removal filter press pump (18) and a filtrate storage tank (23); The connecting pipeline system includes a tap water pipeline and valve (1), a sodium sulfide solution conveying pipeline and valve (8), a manganese sulfate solution pipeline and valve (13), a heavy metal removal pressure filter pipeline (20), and a heavy metal removal pressure filter liquid pipeline (22).

2. The apparatus for removing heavy metals from manganese sulfate solution using sodium sulfide solution according to claim 1, characterized in that, The sodium sulfide dissolving unit also includes: a sodium sulfide dissolving tank agitator (2) and a sodium sulfide dissolving tank level gauge (3) installed on the sodium sulfide dissolving tank (4).

3. The apparatus for removing heavy metals from manganese sulfate solution using sodium sulfide solution according to claim 1, characterized in that, The nozzle (9) of the sodium sulfide solution delivery pipeline is connected to the output end pipeline of the sodium sulfide solution metering pump (6) and is located above the heavy metal removal reaction tank (17). A sodium sulfide solution delivery pipeline flow meter (7) is installed on the output end pipeline of the sodium sulfide solution metering pump (6).

4. The apparatus for removing heavy metals from manganese sulfate solution using sodium sulfide solution according to claim 1, characterized in that, The heavy metal removal reaction tank (17) is equipped with a heavy metal removal reaction tank sampling port (12) and a heavy metal removal reaction tank breathing valve (15). The heavy metal removal reaction tank sampling port (12) is used to sample, detect and analyze the reaction status and data of the heavy metal removal reaction process. The heavy metal removal reaction tank breathing valve (15) is used to maintain the air pressure of the heavy metal removal reaction tank (17) during the heavy metal removal process.

5. The apparatus for removing heavy metals from manganese sulfate solution using sodium sulfide solution according to claim 1, characterized in that, The heavy metal removal reaction tank (17) and the heavy metal removal filtrate storage tank (23) are respectively equipped with a heavy metal removal reaction tank level gauge (16) and a heavy metal removal filtrate storage tank level gauge.

6. The apparatus for removing heavy metals from manganese sulfate solution using sodium sulfide solution according to claim 1, characterized in that, The heavy metal removal filter press pipe (20) is equipped with a heavy metal removal filter press pipe flow meter (19). One end of the heavy metal removal filter press pipe (20) is connected to the output end pipe of the heavy metal removal filter press pump (18), and the other end is connected to the input end of the heavy metal removal filter press (21).

7. The apparatus for removing heavy metals from manganese sulfate solution using sodium sulfide solution according to claim 1, characterized in that, The tap water pipe and valve (1) are used to transport tap water to the sodium sulfide dissolving tank (4), the sodium sulfide solution transport pipe and valve (8) are used to transport sodium sulfide solution from the sodium sulfide dissolving tank (4) to the heavy metal removal reaction tank (17), the manganese sulfate solution pipe and valve (13) are used to transport manganese sulfate solution to the heavy metal removal reaction tank (17), the heavy metal removal filter press pipe (20) is used to transport heavy metal removal slurry from the heavy metal removal reaction tank (17) to the heavy metal removal filter press (21), and the heavy metal removal filter press pipe (22) is used to transport manganese sulfate filter press liquid from the heavy metal removal filter press (21) to the heavy metal removal filter press liquid storage tank (23).

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