A pH adjustment device for gold refining waste liquid

Abstract

This application provides a pH adjustment device for gold refining waste liquid, including a reaction chamber internally containing the waste liquid and a reaction body with a first discharge port and a second discharge port communicating with the reaction chamber. It also includes two feeding hoppers connected to the first and second discharge ports. The first discharge port is used to add solid NaOH to adjust the pH of the waste liquid, and the second discharge port is used to add Polygonatum sibiricum waste liquid into the reaction chamber. It further includes a stirring mechanism, with a first stirring assembly and a second stirring assembly extending into the reaction chamber. The first and second stirring assemblies are symmetrically arranged along the width of the reaction chamber and staggered along the height of the reaction chamber. The first stirring assembly is located near the bottom of the reaction chamber and adheres to the inner wall of the reaction body, while the second stirring assembly is located near the top of the reaction chamber. This structure improves the mixing efficiency between the upper and lower layers.

Description

Technical Field

[0001] This application relates to the field of gold, and more particularly to a pH adjustment device for gold refining waste liquid. Background Technology

[0002] The gold refining process typically involves the use of chemicals containing cyanide, acids, and alkalis, resulting in highly corrosive and polluting wastewater. To meet environmental emission standards, the wastewater must undergo pH adjustment treatment, generally to a neutral or slightly alkaline state, thereby reducing the solubility of heavy metal ions and promoting precipitation reactions.

[0003] Existing technologies using solid NaOH to directly add waste liquid suffer from localized excessively high concentrations while other areas experience insufficient reaction, leading to inaccurate overall pH adjustment. Current solutions often employ a single-unit reaction chamber with a central stirring structure in pH adjustment equipment, resulting in inconsistent reactions between the upper and lower layers of gold refining waste liquid. Therefore, a pH adjustment device for gold refining waste liquid that improves the mixing efficiency between the upper and lower layers is needed. Utility Model Content

[0004] In view of this, it is necessary to provide a pH adjustment device for gold refining waste liquid that improves the mixing efficiency between upper and lower layers in order to solve the above problems.

[0005] An embodiment of this application provides a pH adjustment device for gold refining waste liquid, comprising:

[0006] The reaction body includes a reaction chamber with waste liquid inside, and a first discharge port and a second discharge port connected to the reaction chamber;

[0007] The two feeding hoppers are connected to the first discharge port and the second discharge port. The first discharge port is used to add solid NaOH to adjust the pH value of the waste liquid, and the second discharge port is used to add Polygonatum odoratum waste liquid into the reaction chamber.

[0008] The stirring mechanism includes a first stirring component and a second stirring component extending into the reaction chamber. The first stirring component and the second stirring component are symmetrically arranged along the width direction of the reaction chamber, and the first stirring component and the second stirring component are offset along the height direction of the reaction chamber. The first stirring component is close to the bottom of the reaction chamber and fits against the inner wall of the reaction body, and the second stirring component is close to the top of the reaction chamber.

[0009] In at least one embodiment of this application, the stirring mechanism further includes:

[0010] A drive motor, connected to the reaction body and located at one end away from the reaction chamber, is used to generate rotational force;

[0011] A rotating component is located away from the reaction chamber and connected to the drive motor to receive rotational force. The rotating component is connected to the first stirring component and the second stirring component respectively to drive the first stirring component and the second stirring component to rotate.

[0012] In at least one embodiment of this application, the first stirring assembly includes:

[0013] The first extension rod has one end fixedly connected to the rotating assembly;

[0014] The scraper is fixedly connected to the other end of the extension rod and is located at the bottom of the reaction chamber, and is in contact with the inner wall of the reaction body.

[0015] In at least one embodiment of this application, the cross-section of the scraper is an arc-shaped structure, and the direction of the concave surface of the scraper is consistent with the rotation direction generated by the rotating component.

[0016] In at least one embodiment of this application, the second stirring assembly includes:

[0017] The second extension rod has one end fixedly connected to the rotating assembly, and the first extension rod and the second extension rod are symmetrically arranged in the width direction of the reaction chamber;

[0018] A stirring plate is fixedly connected to the other end of the second extension rod, and the stirring plate and the scraper are offset along the height direction of the reaction chamber.

[0019] In at least one embodiment of this application, the reaction chamber further includes:

[0020] The discharge port is located at the end away from the feeding hopper.

[0021] In at least one embodiment of this application, the first extension rod and the scraper are integrally formed, and the second extension rod is integrally formed with the stirring plate.

[0022] In at least one embodiment of this application, the feeding bin is made of stainless steel.

[0023] In at least one embodiment of this application, the reaction body is configured as a funnel shape.

[0024] In at least one embodiment of this application, a conveyor belt is provided between the drive motor and the rotating assembly.

[0025] The aforementioned pH adjustment device for gold refining waste liquid achieves three-dimensional stirring of the upper and lower layers of liquid within the reaction chamber through two staggered stirring components. The first stirring component, located near the bottom of the reactor and close to the inner wall of the chamber, effectively agitates sediments in the waste liquid and eliminates dead zones. The second stirring component, located at the top of the reaction chamber, enhances the flow of the upper layer of waste liquid, creating a convective circulation with the lower layer. Simultaneously, the first and second stirring components are symmetrically arranged on both sides of the chamber, forming a bidirectional swirling flow, resulting in more uniform mixing of the entire liquid. Attached Figure Description

[0026] Figure 1 This is a perspective view of the pH adjustment device for gold refining waste liquid described in this application;

[0027] Figure 2 This is a top view of the pH adjustment device for gold refining waste liquid described in this application;

[0028] Figure 3 for Figure 2 Cross-sectional view of AA in the middle;

[0029] Figure 4 This is a perspective view of the scraper described in this application;

[0030] Explanation of main component symbols

[0031] 100. pH adjustment device for gold refining waste liquid; 10. Reaction body; 11. Reaction chamber; 12. First discharge port; 13. Second discharge port; 14. Discharge port; 20. Feeding bin; 30. Stirring mechanism; 31. First stirring assembly; 311. First extension rod; 312. Scraper; 3121. Concave surface; 32. Second stirring assembly; 321. Second extension rod; 322. Stirring plate; 33. Drive motor; 34. Rotating assembly; F1. Width direction of reaction chamber; F2. Height direction of reaction chamber. Detailed Implementation

[0032] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0033] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0034] This application provides a pH adjustment device for gold refining waste liquid, comprising: a reaction body, a feeding chamber, and a stirring mechanism. The reaction body includes a reaction chamber internally formed to hold the waste liquid, and a first discharge port and a second discharge port connected to the reaction chamber. Two feeding chambers are connected to the first discharge port and the second discharge port. The first discharge port is used to add solid NaOH to adjust the pH value of the waste liquid. The second discharge port is used to add Polygonatum sibiricum waste liquid into the reaction chamber. The stirring mechanism includes a first stirring component and a second stirring component extending into the reaction chamber. The first stirring component and the second stirring component are symmetrically arranged along the width direction of the reaction chamber. Furthermore, the first stirring component and the second stirring component are offset along the height direction of the reaction chamber. The first stirring component is located near the bottom of the reaction chamber and adheres to the inner wall of the reaction body, while the second stirring component is located near the top of the reaction chamber.

[0035] The aforementioned pH adjustment device for gold refining waste liquid achieves three-dimensional stirring of the upper and lower layers of liquid within the reaction chamber through two staggered stirring components. The first stirring component, located near the bottom of the reactor and close to the inner wall of the chamber, effectively agitates sediments in the waste liquid and eliminates dead zones. The second stirring component, located at the top of the reaction chamber, enhances the flow of the upper layer of waste liquid, creating a convective circulation with the lower layer. Simultaneously, the first and second stirring components are symmetrically arranged on both sides of the chamber, forming a bidirectional swirling flow, resulting in more uniform mixing of the entire liquid.

[0036] 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.

[0037] Please see Figures 1-4 This application provides a pH adjustment device 100 for gold refining waste liquid, comprising: a reaction body 10, a feeding chamber 20, and a stirring mechanism 30. The reaction body 10 includes a reaction chamber 11 internally formed to hold the waste liquid, and a first discharge port 12 and a second discharge port 13 connected to the reaction chamber 11. The two feeding chambers 20 are connected to the first discharge port 12 and the second discharge port 13. The first discharge port 12 is used to add solid NaOH to adjust the pH value of the waste liquid. The second discharge port 13 is used to add Polygonatum sibiricum waste liquid to the reaction chamber 11. The stirring mechanism 30 includes a first stirring component 31 and a second stirring component 32 extending into the reaction chamber 11. The first stirring component 31 and the second stirring component 32 are symmetrically arranged along the width direction F1 of the reaction chamber 11. Furthermore, the first stirring component 31 and the second stirring component 32 are offset along the height direction F2 of the reaction chamber. The first stirring assembly 31 is close to the bottom of the reaction chamber 11 and fits against the inner wall of the reaction body 10, while the second stirring assembly 32 is close to the top of the reaction chamber 11.

[0038] Specifically, the reaction body 10 has a hollow reaction chamber 11 for receiving the gold waste liquid to be treated. To facilitate the centralized discharge of precipitates, the reaction body 10 is preferably funnel-shaped, with a discharge port 14 at its lower end. The discharge port 14 is located at the end away from the feeding direction, so that the adjusted waste liquid can be discharged promptly after the reaction is completed. The reaction body 10 can be made of corrosion-resistant stainless steel, suitable for treating waste liquids containing cyanide, acids, or alkalis.

[0039] The upper part of the reaction body 10 is provided with two feeding ports, which are respectively connected to two feeding chambers 20. One feeding chamber 20 is used to add solid NaOH to neutralize or adjust the pH of the waste liquid. The other feeding chamber 20 is used to pour the original waste liquid into the reaction chamber 11. The two feeding ports are located in different positions to prevent NaOH from reacting violently with the waste liquid as it enters the reaction chamber 11. The feeding chambers 20 are preferably made of stainless steel and can be equipped with a corrosion-resistant sealing structure to prevent the leakage of corrosive vapors.

[0040] To address the issues of liquid stratification and uneven stirring within the reaction chamber 11 during pH adjustment of waste liquid, this application provides a first stirring assembly 31 and a second stirring assembly 32 inside the reaction chamber 11. The first stirring assembly 31 is located near the bottom of the reaction chamber 11, and the second stirring assembly 32 is located near the top of the reaction chamber 11, forming a staggered arrangement of the two components along the height direction F2 of the reaction chamber.

[0041] Furthermore, the first stirring assembly 31 and the second stirring assembly 32 are relatively symmetrically distributed in the width direction of the reaction chamber 11. The first stirring assembly 31 is close to the bottom of the reaction chamber 11 and is mainly used to stir the deposited waste liquid and unreacted substances. The first stirring assembly 31 is set in close contact with the inner wall of the chamber, which is beneficial for scraping off the sediment attached to the bottom.

[0042] The first stirring assembly 31 includes a vertically arranged first extension rod 311. An arc-shaped scraper 312 is fixedly connected to the end of the first extension rod 311. The concave surface 3121 of the arc-shaped scraper 312, i.e. the concave direction of the arc-shaped scraper 312, is consistent with the rotation direction, so that the scraper 312 can continuously keep in contact with the bottom of the reaction chamber 11 during the rotation process, thereby improving the bottom fluidity.

[0043] The second stirring assembly 32 is located near the top of the reaction chamber 11 and is used to drive the upper liquid flow to form downward convection. The second stirring assembly 32 includes a second extension rod 321, the end of which is connected to a straight or slightly angled stirring plate 322. By stirring the upper liquid, it forms an alternating circulating flow with the lower liquid, thereby enhancing the mixing uniformity of the entire chamber.

[0044] The first stirring component 31 and the second stirring component 32 are structurally independent but functionally complementary, forming a bidirectional swirling structure inside the entire reaction chamber 11, flowing from top to bottom and from bottom to top.

[0045] Both the first stirring assembly 31 and the second stirring assembly 32 are powered by a unified rotary drive device. The drive mechanism is located outside the reaction body 10 and includes a drive motor 33 and a rotary assembly 34. To prevent damage from long-term exposure to a corrosive environment, the drive motor 33 is positioned away from the reaction chamber 11. The drive motor 33 can be connected to the rotary assembly 34 via a transmission belt; the transmission belt is just one method of connecting the drive motor 33 to the transmission belt. The rotary assembly 34 is simultaneously connected to the extension rods of both stirring assemblies to synchronously drive the upper and lower stirring components to rotate. The transmission belt can be made of an alkali-resistant and heat-resistant elastic material, such as fluororubber, to ensure reliability during long-term operation.

[0046] Preferably, the first stirring assembly 31 and the second stirring assembly 32 are respectively integrally formed, that is, the first extension rod 311 and its corresponding scraper 312 or the second extension rod 321 and its corresponding stirring plate 322 are integrally formed by welding, casting or integral machining, so as to enhance the assembly accuracy and transmission stability.

[0047] In practical use, the gold refining waste liquid to be treated is first added to the reaction chamber 11 through the second feeding hopper 20. The drive motor 33 is started to rotate the stirring assembly, and then NaOH powder is slowly added through the first feeding hopper 20 to the bottom of the reaction chamber 11. When the first stirring assembly 31 rotates and stirs, the bottom scraper 312 runs in close contact with the inner wall of the chamber, effectively breaking up the sediment in the bottom dead corner. When the second stirring assembly 32 rotates and stirs, the stirring plate 322 enhances the liquid flow, improves the contact efficiency between NaOH and the waste liquid, and accelerates the pH adjustment reaction. Through the first stirring assembly 31 and the second stirring assembly 32, the liquid in the entire reaction chamber 11 can be uniformly mixed in a short time, and the pH value adjustment is faster and more accurate. After the reaction is completed, the pH is tested and confirmed to be up to standard, and the waste liquid is discharged through the bottom outlet 14.

[0048] Therefore, the aforementioned pH adjustment device 100 for gold refining waste liquid achieves three-dimensional stirring of the upper and lower layers of liquid within the reaction chamber 11 through two staggered stirring components. The first stirring component 31, located near the bottom of the reactor and close to the inner wall of the chamber, effectively agitates sediments in the waste liquid and eliminates dead zones. The second stirring component 32, located at the top of the reaction chamber 11, enhances the flow of the upper layer of waste liquid within the chamber, forming a convection circulation with the lower layer. Simultaneously, the first stirring component 31 and the second stirring component 32 are symmetrically arranged on both sides of the chamber, forming a bidirectional swirling flow, resulting in more uniform mixing of the entire liquid.

[0049] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A gold refining waste liquid pH adjusting device, characterized by, include: The reaction body includes a reaction chamber with waste liquid inside, and a first discharge port and a second discharge port connected to the reaction chamber; The two feeding hoppers are connected to the first discharge port and the second discharge port. The first discharge port is used to add solid NaOH to adjust the pH value of the waste liquid, and the second discharge port is used to add Polygonatum odoratum waste liquid into the reaction chamber. The stirring mechanism includes a first stirring component and a second stirring component extending into the reaction chamber. The first stirring component and the second stirring component are symmetrically arranged along the width direction of the reaction chamber, and the first stirring component and the second stirring component are offset along the height direction of the reaction chamber. The first stirring component is close to the bottom of the reaction chamber and fits against the inner wall of the reaction body, and the second stirring component is close to the top of the reaction chamber.

2. The gold refining effluent pH adjustment device of claim 1, wherein, The stirring mechanism also includes: A drive motor, connected to the reaction body and located at one end away from the reaction chamber, is used to generate rotational force; A rotating component is located away from the reaction chamber and connected to the drive motor to receive rotational force. The rotating component is connected to the first stirring component and the second stirring component respectively to drive the first stirring component and the second stirring component to rotate.

3. The gold refining effluent pH adjustment device of claim 2, wherein, The first stirring assembly includes: The first extension rod has one end fixedly connected to the rotating assembly; The scraper is fixedly connected to the other end of the extension rod and is located at the bottom of the reaction chamber, and is in contact with the inner wall of the reaction body.

4. The gold refining effluent pH adjustment device of claim 3, wherein, The scraper has an arc-shaped cross-section, and the concave surface of the scraper is oriented in the same direction as the rotation direction generated by the rotating component.

5. The gold refining effluent pH adjustment device of claim 4, wherein, The second stirring assembly includes: The second extension rod has one end fixedly connected to the rotating assembly, and the first extension rod and the second extension rod are symmetrically arranged in the width direction of the reaction chamber; A stirring plate is fixedly connected to the other end of the second extension rod, and the stirring plate and the scraper are offset along the height direction of the reaction chamber.

6. The gold refining effluent pH adjustment device of claim 1, wherein, The reaction chamber also includes: The discharge port is located at the end away from the feeding hopper.

7. The pH adjustment device for gold refining waste liquid according to claim 5, characterized in that, The first extension rod and the scraper are integrally formed, and the second extension rod and the stirring plate are integrally formed.

8. The gold refining effluent pH adjustment device of claim 1, wherein, The feeding hopper is made of stainless steel.

9. The gold refining effluent pH adjustment device of claim 1, wherein, The reaction body is designed in a funnel shape.

10. The gold refining effluent pH adjustment device of claim 2, wherein A conveyor belt connects the drive motor and the rotating assembly.

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