TWM495369U - Metal recovery equipment - Google Patents

Description

Metal recycling unit

The present invention relates to a metal recovery device, and more particularly to a metal recovery device for recovering metal ions in wastewater.

In the current booming technology, factories or laboratories in various fields can be seen, and the wastewater discharged from these factories or laboratories often contains a large amount of metal ions. If the wastewater is discharged into the river without any treatment, it will not only be The natural environment causes pollution and is more likely to endanger the health of the human body. Therefore, how to reduce the metal ions in the discharged wastewater and at the same time recover the metal has become an urgent problem to be solved.

Electrodeposition is one of the methods currently used to reduce metal ions in wastewater while recovering metals. The metal recovery device using the electrodeposition method is to immerse an anode and a cathode connected to the power supply unit in a reaction tank containing waste water, and then supply a voltage to the anode through the power supply unit. The cathode causes electrodeposition of metal ions in the wastewater to form a metal on the cathode, thereby reducing metal ions in the wastewater and simultaneously recovering the metal. However, since the anode of the conventional metal recovery device is flat, during the recovery process, the metal ions move to the cathode at a slow rate, causing hydrogen ions to collide with the metal ions at the cathode. The area on the surface that competes for the reduction reaction causes a decrease in metal recovery rate and does not effectively reduce metal ions in the wastewater.

Therefore, how to improve the conventional metal recovery device to improve the metal recovery rate has become the goal of current research.

Accordingly, it is an object of the present invention to provide a metal recovery apparatus having high metal recovery.

Therefore, the novel metal recovery device comprises a reaction tank, a cathode, an anode and a power supply unit.

The reaction tank is for containing a liquid containing metal ions. The cathode is disposed in the reaction tank. The anode is disposed in the reaction vessel and spirally surrounds the cathode and is spaced apart from the cathode. The power supply unit connects the cathode and the anode.

The effect of the novel is that the anode spirally surrounds the cathode and is spaced apart from the cathode, so that the anode can provide a magnetic field to increase the speed at which metal ions move to the cathode, and therefore, the metal ions in the liquid are relatively hydrogen. The ions are more likely to reach the surface of the cathode for reduction, thereby increasing the metal recovery rate and effectively reducing metal ions in the wastewater, and it is worth mentioning that the present invention does not require additional means to provide a magnetic field.

The present invention will be described in detail below: Preferably, the cathode is a platinum electrode.

Preferably, the anode is a stainless steel electrode.

Preferably, the power supply unit supplies direct current to the anode and the cathode.

Preferably, the anode is spirally extended from the top to the bottom to gradually expand into a spiral shape.

1‧‧‧Reaction tank

2‧‧‧ cathode

3‧‧‧Anode

4‧‧‧Power supply unit

5‧‧‧Liquid

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is a schematic view showing a first embodiment of the present metal recovery device; and FIG. 2 is a schematic view. A second embodiment of the novel metal recovery apparatus will be described.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

<First Embodiment>

Referring to Figure 1, a first embodiment of the novel metal recovery apparatus is used to reduce metal ions in wastewater while recovering metals and has high metal recovery. The metal recovery device comprises a reaction tank 1, a cathode 2, an anode 3 and a power supply unit 4.

The reaction tank 1 is a 50 mL beaker for containing a liquid 5 containing metal ions. The source of the metal ion-containing liquid 5 may be wastewater discharged from a factory or a laboratory, and the metal ion is a metal ion commonly found in wastewater, such as copper ions.

The cathode 2 is disposed in the reaction vessel 1 as a cylindrical platinum electrode having a diameter of 12 mm, a height of 20 mm, and a surface area of 754 mm ² (the area immersed in the liquid 5). It should be specially noted that the material of the cathode 2 can also be other conductive materials for metal deposition.

The anode 3 is a stainless steel wire having a wire diameter of 2 mm, is disposed in the reaction tank 1, and spirally surrounds the cathode 2 and is spaced apart from the cathode 2, and has a spiral cylindrical shape extending from a top to a bottom. The anode 3 has an inner diameter of 20 mm around the cathode 2 and a number of turns of 20 turns. It must be particularly noted that the material of the anode 3 may also be other conductive materials that do not participate in the electrodeposition reaction and can be made into a spiral, such as platinum metal.

The power supply unit 4 supplies a constant voltage of direct current to the cathode 2 and the anode 3. Since the electric field provided by the constant voltage direct current is a stable electric field of non-frequency oscillation, the electrodeposition reaction of the metal ions occurs only at the cathode 2.

When it is desired to reduce the metal ions in the metal ion-containing liquid 5 and recover the metal, the liquid 5 is first placed in the reaction tank 1, and the cathode 2 and the anode 3 are separately immersed in the liquid 5 And supplying a constant voltage direct current to the cathode 2 and the anode 3 through the power supply unit 4, so that the cathode 2 can provide electrons required for electrodeposition reaction of metal ions in the liquid 5, and since the anode 3 is The cathode 2 is spirally surrounded and spaced apart from the cathode 2, so that the anode 3 can simultaneously provide a magnetic field, increasing the velocity of the metal ions in the liquid 5 to move toward the cathode 2, making metal ions easier than hydrogen ions. Reaching the surface of the cathode 2 to carry out a reduction reaction, thereby improving the metal recovery rate, effectively reducing metal ions in the liquid 5, and solving the conventional metal recovery device using a flat anode, Metal ions move slowly in the liquid, resulting in low metal recovery and ineffective reduction of metal ions in the wastewater.

<Second embodiment>

Referring to Figure 2, a second embodiment of the novel metal recovery apparatus is similar to the first embodiment except that the anode 3 is shaped to spirally extend from top to bottom in a spiral shape that gradually expands.

<Metal recovery test experiment>

Liquids each having a pH of 0.79 and -0.43 and each containing 500 ppm of Cu ²⁺ were separately charged into the reaction tank 1 of the metal recovery apparatus of the first embodiment, and 0.5 was provided to the cathode 2 and the anode 3, respectively. A constant voltage DC of A (applied magnetic field is 0.001T) and 3.0A (applied magnetic field is 0.005T). After 6 hours, the concentration of Cu ²⁺ remaining in the liquid is analyzed and the metal recovery is calculated according to the following formula (I). Rate, the results are shown in Table 1 below.

[Formula I] Metal recovery rate (%) = [1 - (x / 500)] × 100; x: Cu ²⁺ concentration (ppm) remaining in the liquid.

<Comparative example>

The metal recovery apparatus of the comparative example is similar to the first embodiment (not shown) except that the anode of the metal recovery apparatus of the comparative example encloses a flat stainless steel sheet around a cathode and is spaced apart from the cathode. A circular tubular electrode having an inner diameter of 20 mm was formed, wherein the cathode was a cylindrical platinum electrode having a diameter of 12 mm, a height of 20 mm, and a surface area of 754 mm ² (area immersed in a liquid), and the anode was disposed concentrically with the cathode.

<Metal recovery test experiment>

Liquids having pH values of 0.79 and -0.43 and each containing 500 ppm of Cu ²⁺ were separately charged into the reaction tank of the metal recovery apparatus of the above comparative example, and a constant voltage of 1 V was supplied to the anode and the anode, respectively. Without applying a magnetic field, after 6 hours, the concentration of Cu ²⁺ remaining in the liquid was analyzed, and the metal recovery rate was calculated according to the above formula (I). The results are shown in Table 1 below.

<Results and Discussion>

As is clear from the results of Table 1, the anode was spirally surrounded by the first embodiment of the cathode (the applied magnetic fields were 0.001 T and 0.005 T, respectively), and the metal recovery device (without the applied magnetic field) of the comparative example in which the anode was flat was compared. At different pH values, the metal recovery of the first embodiment is significantly improved, and the greater the applied magnetic field, the higher the metal recovery rate.

In summary, the novel metal recovery device is due to the anode 3 Surrounding the cathode 2 in a spiral shape and spacing from the cathode 2, the anode 3 can provide a magnetic field to increase the speed at which metal ions move toward the cathode, and therefore, the metal ions in the liquid 5 are more likely to reach the cathode than the hydrogen ions. 2 The surface is subjected to a reduction reaction, thereby increasing the metal recovery rate, effectively reducing the metal ion content in the wastewater, and the present invention does not require additional use of other means to provide a magnetic field, so the object of the present invention can be achieved.

However, the above description is only for the embodiments of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent changes and modifications made by the present patent application scope and the contents of the patent specification are still It is within the scope of this new patent.

1‧‧‧Reaction tank

2‧‧‧ cathode

3‧‧‧Anode

4‧‧‧Power supply unit

5‧‧‧Liquid

Claims (5)

A metal recovery device comprising: a reaction tank for accommodating a liquid containing metal ions; a cathode disposed in the reaction tank; an anode disposed in the reaction tank and spirally surrounding the cathode and The cathodes are spaced apart; and a power supply unit connecting the cathode and the anode. The metal recovery device of claim 1, wherein the cathode is a platinum electrode. The metal recovery device of claim 1, wherein the anode is a stainless steel electrode. The metal recovery device of claim 1, wherein the power supply unit supplies direct current to the anode and the cathode. The metal recovery device according to claim 1, wherein the anode is spirally extended from a top to a bottom to gradually expand into a spiral shape.