Metal sludge acid leaching device

Abstract

The utility model discloses a metal sludge acid leaching device, which relates to the technical field of sewage and sludge treatment and comprises a base, an acid pool and a liquid adding device, the acid pool and the liquid adding device are arranged on the base, and the acid pool is sequentially composed of an arc-shaped groove, a connecting groove and an extending groove from bottom to top; a scraping plate is arranged in the acid pool, the scraping plate is of a U-shaped structure, the outer wall of the scraping plate is attached to the inner walls of the arc-shaped groove and the connecting groove, an electric push rod fixedly connected with one side of the scraping plate is arranged on the acid pool, and the scraping plate can reciprocate in the width direction of the acid pool; an auger is arranged in the scraper blade; a stirring motor fixedly connected with one end of the auger is arranged on the acid tank; the liquid adding device comprises a stirring tank, a rotating motor, a stirring rod and a suction pump; a feeding opening is formed in the stirring tank, the stirring rod is vertically arranged in the stirring tank, and the rotating motor is arranged on the stirring tank; the leaching efficiency of metal and acid liquor is improved, and the function of automatically adding the acid liquor is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage and sludge treatment, in particular to a metal sludge acid leaching device. Background Art

[0002] Currently, my country's polymetallic hazardous wastes primarily consist of sludge or wastewater generated by industries such as electroplating, surface treatment, smelting, and the chemical industry. These wastes contain a variety of metals, including iron, chromium, copper, zinc, nickel, cobalt, and manganese. Chromium is a highly toxic heavy metal that easily enters human cells, causing damage to internal organs such as the liver and kidneys, as well as DNA. It accumulates in the human body, is carcinogenic, and may induce genetic mutations. The harmless treatment of chromium-containing wastes is crucial. Harmless treatment technologies for chromium-containing wastes can generally be divided into two categories: solidification and stabilization technology, and recycling technology. Recycling technology involves leaching the primary target metal using a certain leaching agent, followed by extraction, precipitation, electrolysis, and other methods to extract and utilize the metal products for recycling, thereby achieving the recycling of metal resources. This represents a future development trend.

[0003] Acid leaching involves preparing a mixture of sludge containing metal elements, adding water to the sludge to make a pulp, and slowly adding 98% H2SO4. When the pH is adjusted to a stable pH of 0.5, the addition of acid is stopped and the dissolution process continues, allowing the metal elements in the sludge to enter the solution. However, since the sludge contains other impurities besides metals, such as soil and stones, they are prone to precipitation in the leaching tank, affecting the leaching of metals. In addition, existing acid leaching equipment does not have the function of automatically adding acid solution, which reduces work efficiency.

[0004] Therefore, there is an urgent need for a metal sludge acid leaching device that is convenient for adding acid solution and improving the leaching of metals. Utility Model Content

[0005] The purpose of the utility model is to provide a metal sludge acid leaching device, which improves the leaching efficiency of metal and acid solution and realizes the function of automatically adding acid solution.

[0006] To achieve the above-mentioned object, the utility model provides the following technical solutions: a metal sludge acid leaching device, comprising a base, an acid tank arranged on the base, and a liquid adding device, wherein the acid tank is composed of an arc groove, a connecting groove, and an extension groove from bottom to top; a scraper is provided in the acid tank, and the scraper has a U-shaped structure, and the outer wall of the scraper is in contact with the inner wall of the arc groove and the connecting groove; an electric push rod fixedly connected to one side of the scraper is provided on the acid tank, and the scraper can reciprocate along the width direction of the acid tank; an auger is provided inside the scraper; and a stirring motor fixedly connected to one end of the auger is provided on the acid tank;

[0007] The liquid adding device includes a stirring tank, a rotating motor, a stirring rod, and a pump; the stirring tank is provided with a feeding port, the stirring rod is vertically arranged in the stirring tank, the rotating motor is arranged on the stirring tank, the upper end of the stirring rod is fixedly connected to the output end of the stirring motor, and the pump is connected to the stirring tank and the acid tank respectively through pipelines.

[0008] In order to weigh the metal sludge in the acid tank, as a preferred metal sludge acid leaching device of the present invention, a scale is provided on the top of the base, and the acid tank is provided on the scale.

[0009] In order to set the acid tank on the scale, as a preferred metal sludge acid leaching device of the present invention, a group of cylinders and a group of legs are provided on the top of the scale, and the acid tank is set on the scale through the group of cylinders and a group of legs, and a drainage pipe is provided below the front end surface of the acid tank.

[0010] In order to facilitate the control of the amount of acid added, as a preferred metal sludge acid leaching device of the present invention, a radar level meter is provided inside the stirring tank, and a PLC controller is provided on the stirring tank, and the PLC controller is electrically connected to the scale, radar level meter and pump respectively.

[0011] In order to heat the acid solution, as a preferred metal sludge acid leaching device of the present invention, a heating plate and a temperature sensor are provided in the stirring tank, and the PLC controller is electrically connected to the temperature sensor and the heating plate respectively.

[0012] In order to visually check the amount of acid in the stirring tank, as a preferred metal sludge acid leaching device of the present invention, the stirring tank is provided with a visual window.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The utility model starts the electric push rod and the scraper moves back and forth to prevent the metal sludge from settling or accumulating on the inner wall of the acid tank, and starts the stirring motor to rotate the auger to stir the metal sludge and the acid leaching liquid to prevent the metal sludge from settling, so that the covered metal can be turned out to contact the acid liquid, thereby improving the leaching efficiency of the metal and the acid liquid;

[0015] The utility model adds water, sulfuric acid and other ingredients required for preparing acid leaching liquid into a stirring tank in proportion through a feeding port, starts a rotary motor, rotates a stirring rod, and fully mixes the water, sulfuric acid and other ingredients. After stirring and mixing, an acid leaching liquid is formed, and the pump is started to automatically transport the stirred and mixed acid leaching liquid into an acid pool, thereby realizing the function of automatically adding acid liquid and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 AA structural diagram;

[0018] Figure 3 This is a schematic diagram of the top view of the acid pool of the utility model.

[0019] In the figure: 1. Base; 2. Acid tank; 3. Liquid adding device; 4. Arc trough; 5. Connecting trough; 6. Extension trough; 7. Scraper; 8. Electric push rod; 9. Auger; 10. Stirring motor; 11. Stirring tank; 12. Rotating motor; 13. Stirring rod; 14. Pump; 15. Feeding port; 16. Scale; 17. Cylinder; 18. Support leg; 19. Drain pipe; 20. Radar level gauge; 21. PLC controller; 22. Heating plate; 23. Temperature sensor; 24. Viewing window. DETAILED DESCRIPTION

[0020] See also Figures 1 to 3 A metal sludge acid leaching device includes a base 1, an acid tank 2 and a liquid adding device 3 arranged on the base 1. The acid tank 2 is composed of an arc groove 4, a connecting groove 5 and an extension groove 6 from bottom to top; a scraper 7 is provided in the acid tank 2, and the scraper 7 has a U-shaped structure. The outer wall of the scraper 7 is in contact with the inner wall of the arc groove 4 and the connecting groove 5. The acid tank 2 is provided with an electric push rod 8 fixedly connected to one side of the scraper 7, and the scraper 7 can reciprocate along the width direction of the acid tank 2; an auger 9 is provided inside the scraper 7; and a stirring motor 10 fixedly connected to one end of the auger 9 is provided on the acid tank 2;

[0021] The liquid adding device 3 includes a stirring tank 11, a rotating motor 12, a stirring rod 13, and a pump 14; a feeding port 15 is provided on the stirring tank 11, the stirring rod 13 is vertically arranged in the stirring tank 11, the rotating motor 12 is arranged on the stirring tank 11, the upper end of the stirring rod 13 is fixedly connected to the output end of the stirring motor 10, and the pump 14 is connected to the stirring tank 11 and the acid tank 2 respectively through pipelines.

[0022] In this embodiment, metal sludge is poured into the acid pool 2, water, sulfuric acid and other ingredients required for making the acid leaching solution are added to the stirring tank 11 through the feeding port 15, the rotating motor 12 is started, the stirring rod 13 is rotated, and the water, sulfuric acid and other ingredients are easily mixed. By starting the pump 14, the stirred and mixed acid leaching solution can be automatically transported to the acid pool 2, thereby achieving the purpose of automatically adding the acid leaching solution; the electric push rod 8 is started, the scraper 7 moves back and forth to prevent the metal sludge from settling or accumulating on the inner wall of the acid pool 2, and the stirring motor 10 is started, the auger 9 is rotated to stir the metal sludge and the acid leaching liquid to prevent the metal sludge from settling, so that the covered metal can be turned out to contact the acid solution, thereby improving the leaching efficiency of the metal and the acid solution, and the connecting groove 5 and the extension groove 6 prevent the acid leaching solution from splashing outside the acid pool 2.

[0023] As a technical optimization solution of the present invention, a scale 16 is provided on the top of the base 1 , and the acid tank 2 is provided on the scale 16 .

[0024] In this embodiment, the metal sludge on the inner wall of the acid tank 2 is weighed by the scale 16 , so that the amount of acid leaching liquid that needs to be added to the acid tank 2 can be accurately determined.

[0025] As a technical optimization solution of the present invention, a group of cylinders 17 and a group of legs 18 are provided on the top of the scale 16, and the acid pool 2 is set on the scale 16 through the group of cylinders 17 and a group of legs 18; a drainage pipe 19 is provided below the front end surface of the acid pool 2.

[0026] In the present embodiment, the bottom of a group of cylinders 17 is movably mounted on the scale 16, the bottom of a group of legs 18 is fixedly mounted on the scale 16, the output end of the group of cylinders 17 and the upper end of the group of legs 18 are both movably connected to the acid pool 2, and the electric cylinder is started to adjust the inclination of the acid pool 2 so that one end of the acid pool 2 provided with the drain pipe 19 is lowered to clean the metal sludge on the inner wall of the acid pool 2.

[0027] As a technical optimization solution of the present invention, a radar level meter 20 is provided inside the mixing tank 11, and a PLC controller 21 is provided on the mixing tank 11. The PLC controller 21 is electrically connected to the scale 16, the radar level meter 20 and the pump 14 respectively.

[0028] In this embodiment, the scale 16 weighs the metal sludge inside the acid tank 2, and the weighed value is transmitted to the PLC controller 21. After the PLC controller 21 analyzes and processes it, it powers on the pump 14, and the radar level meter 20 monitors the acid leaching liquid inside the mixing tank 11. When the water level reaches the delivery capacity, the PLC controller 21 controls the pump 14 to cut off the power, thereby achieving the purpose of quantitatively delivering the acid leaching liquid in the box acid tank 2, so that the amount of metal sludge and acid leaching liquid is acid-leached according to the standard ratio.

[0029] As a technical optimization solution of the present invention, a heating plate 22 and a temperature sensor 23 are provided in the stirring tank 11, and the PLC controller 21 is electrically connected to the temperature sensor 23 and the heating plate 22 respectively.

[0030] In this embodiment: the heating plate 22 heats the liquid inside the stirring tank 11, which makes it easy for the water added to the stirring tank 11 to quickly and fully blend with the sulfuric acid and other ingredients, and the heated acid leaching liquid is transported to the acid pool 2, which can improve the reaction between the acid leaching liquid and the sludge metal and improve the leaching efficiency of the metal and the acid liquid. The temperature sensor 23 monitors the acid liquid inside the stirring tank 11 in real time. When the temperature reaches the set value, the PLC controller 21 controls the heating plate 22 to cut off the power.

[0031] As a technical optimization solution of the present invention, a visual window 24 is provided on the stirring tank 11 .

[0032] In this embodiment, the remaining amount of the acid leaching liquid inside the stirring tank 11 can be visually checked.

[0033] Working principle: First, water, sulfuric acid and other ingredients required for making the acid leaching solution are added to the stirring tank 11 in proportion through the feeding port 15, the rotating motor 12 is started, and the stirring rod 13 is rotated to fully mix the water, sulfuric acid and other ingredients. Then, the metal sludge is poured into the acid tank 2. The metal sludge on the inner wall of the acid tank 2 is weighed by the scale 16 to accurately determine the amount of acid leaching solution required to be added to the acid tank 2; the pump 14 is started to automatically transport the stirred and mixed acid leaching solution into the acid tank 2. The amount of the transported acid leaching solution can be detected by the radar level meter 20, so that the metal sludge and acid leaching solution are acid-leached according to the standard ratio.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A metal sludge acid leaching device, comprising a base (1), an acid tank (2) arranged on the base (1), and a liquid adding device (3), characterized in that: The acid pool (2) is composed of an arc groove (4), a connecting groove (5) and an extension groove (6) from bottom to top; a scraper (7) is arranged in the acid pool (2); the scraper (7) is in a U-shaped structure; the outer wall of the scraper (7) is in contact with the inner walls of the arc groove (4) and the connecting groove (5); an electric push rod (8) fixedly connected to one side of the scraper (7) is arranged on the acid pool (2); the scraper (7) can reciprocate along the width direction of the acid pool (2); an auger (9) is arranged inside the scraper (7); and a stirring motor (10) fixedly connected to one end of the auger (9) is arranged on the acid pool (2); The liquid adding device (3) comprises a stirring tank (11), a rotating motor (12), a stirring rod (13), and a pump (14); the stirring tank (11) is provided with a feeding port (15); the stirring rod (13) is vertically arranged in the stirring tank (11); the rotating motor (12) is arranged on the stirring tank (11); the upper end of the stirring rod (13) is fixedly connected to the output end of the stirring motor (10); and the pump (14) is connected to the stirring tank (11) and the acid tank (2) through pipelines.

2. A metal sludge acid leaching device according to claim 1, characterized in that: A scale (16) is arranged on the top of the base (1), and the acid tank (2) is arranged on the scale (16).

3. A metal sludge acid leaching device according to claim 2, characterized in that: A group of cylinders (17) and a group of legs (18) are arranged on the top of the scale (16); the acid pool (2) is arranged on the scale (16) via the group of cylinders (17) and the group of legs (18); and a drainage pipe (19) is arranged below the front end surface of the acid pool (2).

4. A metal sludge acid leaching device according to claim 1, characterized in that: A radar level meter (20) is arranged inside the mixing tank (11), and a PLC controller (21) is arranged on the mixing tank (11). The PLC controller (21) is electrically connected to the scale (16), the radar level meter (20) and the pump (14) respectively.

5. A metal sludge acid leaching device according to claim 4, characterized in that: A heating plate (22) and a temperature sensor (23) are provided in the stirring tank (11), and the PLC controller (21) is electrically connected to the temperature sensor (23) and the heating plate (22), respectively.

6. A metal sludge acid leaching device according to claim 1, characterized in that: The stirring tank (11) is provided with a viewing window (24).

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