JPS589048B2 - Katsuseitan Sea Tono Saiseibu Katsuhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for reactivating used activated carbon sheets.

The detoxification of waste water and waste gas discharged from factories and other sources has traditionally been an important issue, but recently, as pollution problems have attracted particular attention, it has become the most important concern.

Various studies have been conducted on these detoxification treatment methods, but in all of them, treatment using activated carbon occupies a very large proportion.

Activated carbon has a very large adsorption power and is very suitable for purifying waste gas, waste water, etc., so it is used in granular or powdered forms depending on the purpose.

Recently, what is called carbon fiber has been perfected, and at the same time activated carbon in the form of paper or woven sheets has also been produced and put into practical use.

This sheet-shaped activated carbon has the same adsorption effect as conventional granular or powdered activated carbon, and since it is sheet-shaped and easy to handle, it is being used in a wide variety of fields.

When activated carbon is sufficiently adsorbed, its adsorption power becomes saturated and its activity gradually decreases.

Moreover, depending on the kind of adsorbed substance, the adsorption force may be easily saturated, and desorption may not be easily carried out.

Therefore, when treating a large amount of waste water or waste gas, the success or failure of a treatment method using activated carbon is determined not only by the availability of desorption, but also by the availability, difficulty, and cost of regeneration treatment.

However, an appropriate method for reactivating it has not yet been established.

The reactivation methods for activated carbon all involve heating at high temperatures, and rolling the activated carbon in order to apply heat evenly. W is suitable for granular activated carbon, but sheet activated carbon cannot be activated by heat. This was not possible because it would disappear and cannot be rolled.

Therefore, when using sheet activated carbon, it was necessary to replace it every time.

The present invention aims to eliminate these drawbacks and provides a simple and effective reactivation method.

In principle, the treatment method of the present invention uses activated carbon in the form of woven fabric or paper, as shown in FIG.
The sheets are stacked as a pair, one sheet is fixed to the workpiece 2 connected to the positive electrode, and the other sheet is fixed to the workpiece 3 connected to the negative electrode, and a voltage is applied between these two sheets. It consists of causing spark discharge by vibrating two sheets in parallel so that they rub against each other.

In reality, a large number of activated carbon sheets are stacked one on top of the other, and the activated carbon sheets are alternately connected to positive and negative electrodes, and a voltage is applied to generate spark discharge while vibrating them so that they slide on each other. Just let it happen.

By doing so, the adsorbed components are easily rendered harmless and desorbed.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a sectional view of a tank showing a method of reactivating an activated carbon sheet incorporated into a purification device.

The purifier main body 4 has a wastewater inlet 5 at the lower part, a purified water outlet 6 and an exhaust port 7 at the upper part, and the inner space 8 of the apparatus main body 4 has a waste water inlet 5 at equal intervals. A large number of pairs of activated carbon sheets 1 are supported by walls 2 and 3.

The works 2 and 3 are connected to vibrators 9 and 10, respectively, and vibrate left and right.

When the purification device configured as described above is used for water treatment, sewage is introduced from the sewage inlet 5 at the bottom of the device main body 4, as in the conventional case, and the activated carbon seam N in the device main body 4,
1.1... It passes through the layer and is taken out from the purification outlet 6 at the top.

At this time, the valve 11 of the exhaust port 7 is kept closed.

Furthermore, by attaching a valve 12 to the inlet 5, the amount of wastewater introduced can be adjusted in relation to the adsorption capacity of activated carbon.

If the purification process is carried out for a long time, the adsorption capacity of the activated carbon sheet 1 will become saturated and the purification capacity will decrease.

At that time, the supply of sewage is stopped and the activated carbon is regenerated and activated.

The reactivation process is performed after the water in the main body 4 of the device is once discharged.

First, the pipe rakes 9 and 10 attached to the workpieces 2 and 3 are activated to vibrate the activated carbon sheets 1, 1.1... in the device, and then when electric current is passed through the workpieces 2 and 3, the activated carbon sheet 1 is activated.
As the activated carbon sheets rub against each other due to vibration, spark discharge occurs violently and the activated carbon sheet is reactivated.

As the activation process progresses, some of the adsorbed impurities become harmless gases and are desorbed, so these are discharged to the outside from the exhaust port 7 provided at the top of the main body 4 of the device.

At this time, the valve 13 of the discharge port 6 is closed.

The sewage treatment method is carried out as described above, and waste gas is also treated in the same manner.

Regarding the discharge phenomenon in the present invention, in the case of a factory or the like, it is preferable to discharge the battery constantly during use, but in the case of a car or the like, it may be discharged intermittently.

In addition, although the said Example described the regeneration of the activated carbon sheet in a purification apparatus, it goes without saying that a dedicated regeneration activation apparatus may be used.

In that case, it is more efficient to carry out the process with the activated carbon sheet hanging vertically.

[Brief explanation of the drawing]

FIG. 1 is an enlarged view of a pair of activated carbon sheets, and FIG. 2 is a cross-sectional view of an activated carbon sheet purification, regeneration, and activation device. In the figure, 1...activated carbon sheet, 2, 3...work, 4...device main body, 5...sewage inlet, 6...outlet, 7...
Exhaust port, 8... device main body internal space, 9, 10... vibrator, 11, 12, 13... valve.

Claims (1)

[Claims] 1. A method for regenerating and activating activated carbon sheets, which comprises vibrating a pair of activated carbon sheets in parallel so as to rub against each other, and applying positive and negative voltages to each activated carbon sheet to generate a discharge phenomenon.