KR890005597Y1 - Electric current feeder in fluidized bed electrode reactor - Google Patents

Abstract

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Description

Improved Current Feeder for Fluidized Bed Electrode Reactors

1 is a plan view and a side view of the current feeder of the present invention.

2 is a structural cross-sectional view of a typical fluidized bed electrode reactor.

3 is a general schematic diagram of a typical fluidized bed electrode reactor.

4 is a plan view and a side view of a conventional current feeder.

* Explanation of symbols for main parts of the drawings

10 current feeder 11 metal rod

The present invention relates to a high efficiency current feeder for conductive particles that are fluidized in the electrodeposition reaction of metal ions in an induction layer electrode reactor.

In general, the fluidized bed electrode reactor is a three-dimensional electrochemical reactor in which the entire fluidized particles 2 in the fluidized bed act as electrodes, as shown in FIG. 2. It has many advantages, including the ability to do it.

Particularly, the reaction surface area per unit volume is higher than that of a planar electrode reactor, so the efficiency is high, and the heavy metal recovery and removal can be performed from the ash solution such as the extraction of metals from the solution or the factory wastewater containing heavy metals.

In addition, in the planar electrode, the metal ion concentration in the solution should be in the range of 30-150g / 1 in order to obtain an economically operable current efficiency in electrolyzing the metal, but the metal ion concentration in the fluidized bed electrode reactor 5 is 1 Even as low as 1 mg / 1 is possible.

And the charge transfer mechanism for the fluidized bed electrode reactor has not yet been clearly identified, and so far, to explain the current flow through the fluidized bed electrode, the charge transfer mechanism is transferred to the single particle collision mechanism by the collision of particles. It is known that charge distribution occurs during the collision, so that current is transferred from the current feeder to one particle by mutual collision. In the transfer mechanism, the whole particle is monopolar, and in the polarized fluidized bed electrode reactor It is considered that the cathode reaction occurs in the entire reactor, and the cathode and anode potentials in the electrode potential measurement are not measured, respectively, but are considered as simple potential fluctuations.

In the conventional art in this technique, the current feeder 3 of the induction layer electrode reactor 5 constructed as shown in FIG. 1 has the configuration as shown in FIG.

Since the current feeder 3 allows the cathode and the anode potential to be sensed at the same time according to the reactor position, a region appears to be dissolved in the fluidized bed electrode reactor 5 instead of electrodeposition, resulting in a decrease in current efficiency.

That is, it is considered that the charge transfer mechanism in the fluidized bed electrode reactor is bipolar because the anode potential and the cathode potential are simultaneously measured in the fluidized bed electrode, and the fluidized bed reactor is intended to electrodeposit the metal ions of the heavy metal and the dilute solution in the wastewater. Since the area | region which melt | dissolves in appears, efficiency fell.

In addition, 1 is an anode, 4 is a dispersion plate, 6 is a rotameter, and 7 is a pump here.

The present invention is intended to improve the problems as described above.

This is to provide a current feeder which can reduce the current efficiency drop due to the use of a circular net as a current feeder in a fluidized bed electrode reactor and can supply a current without changing the flow type of the fluidized bed electrode particles.

This will be described in detail below.

That is, in the present invention, as shown in FIG. 1, the height of the fluidized bed h of the metal rod 11 equal to the diameter of the fluidized particle 2 of the induction layer electrode is 4 points that are 1/2 of the center and the radius of the circular mesh 12 and perpendicular to the center. It is designed to be of size.

According to the present invention of the above configuration, first, since the dipolarity in the induction layer electrode reactor 5 as shown in FIG. Must have continuously, the plurality of metal rods 11 of the current feeder 10 of the present invention is to prevent the dipolarization can act as a bridge with another particle group when the particle group is formed during fluidization.

As an example, in the present invention, an induction layer electrode reactor (5) using the current feeder (10), instead of an experiment to recover the heavy metal in the waste water. The efficiency of the current feeder 10 for constant current density and charge expansion in the copper electrodeposition system was examined as the following examples.

Example 1

Experimental the copper sulfate electrolytic solution is a 0.1M copper sulfate solution 1M hanhu the dilute sulfuric acid in distilled water to secondary electrolyte made using a 15L and and a constant current density to 1000A / m ² 22% bed expansion with conventional current feeder used in the Using the current feeder (A) developed in the present invention and the measurement results measured by operating for 1 hour at 25 ° C., respectively, are shown below.

Wn: Net Electrodeposition Weight

Example 2

Other conditions were shown next by comparing the results measured by the same method as Example 1 with the layer expansion of 32% under the same conditions as in Example 1.

The theoretical copper weight to be electrodeposited in Examples 1 and 2 is 0.843 (g) and the net electrodeposition weight (Wn) is as much as the volume change with respect to the copper particle weight change when the weight change of the copper particles is measured by picometer. The change in weight was calculated in consideration of the amount of water and the net crk weight (Wn) is expressed by the following equation.

.

Where Wn =: net electrodeposition weight, W: weight change measured in picometer, P: particle density, W; Density of water.

The present invention as described above is a highly efficient fluidized bed electrode reactor capable of electrodepositing metal ions of wastewater or solution to a thin concentration in a fluidized bed electrode reactor equipped with the current feeder of the present invention in which a plurality of metal rods are upright, and a fluidized bed There is a beneficial feature that reduces the dipolar strength of the particles in the inside and is efficient at low current densities.

Claims (1)

A pair of current feeders 10 in which a plurality of metal rods 11 corresponding to the fluidized bed height h are vertically placed in a circular net 12 to recover heavy metals in the wastewater and to deposit metal ions in the lean solution. A current feeder of a fluidized bed electrode reactor characterized in that the polarity strength is reduced as much as possible and the efficiency of the fluidized bed electrode particles can be improved without changing the flow pattern of the fluidized bed electrode particles.