JP2001089121A - Microwave-heating method of active carbon and controlling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microwave-heating method of recycling active carbon improved in difficulties of heating the active carbon by utilizing a microwave changing contaminants into carbide and then removing the carbide from the surface and inside pores of the treating active carbon and the obtained recycled active carbon is inferior in quality. SOLUTION: The recycled active carbon excellent in quality having cleaned inside pores is obtained by turning off irradiation of microwave, spraying hot water to the active carbon to be recycled having carbide of pollution on the heated surface and inside pores to remove the carbide and producing cleaned recycled active carbon of excellent quality and at the same time vaporizing the hot water penetrated to the inside pores, and the steam pressure of the vaporized water blasts and exhausts the carbides in the inside pore to outside and cleans the inside pores.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for charging activated carbon in a water treatment process and filtering the same to recycle and reuse the activated carbon in a water treatment process for environmental sanitation. The present invention relates to a microwave heating method and a control device for activated carbon used in a method.

[0002]

2. Description of the Related Art Water supply and sewerage systems are generally operated for 24 hours by a water supply system that collects water from a water intake source from a river or the like, filters the water, and supplies purified water, or a sewerage system that treats organic substances and discharges the water to a river. Here, looking at the water supply facilities, the filtration ponds of the entire process use granular activated carbon to filter and purify impurities, sterilize chlorine, and send water.

Conventionally, granular activated carbon filtration ponds have a step of removing impurities by backwashing about every one week because impurities accumulate in the water and cause clogging.
Even if the backwash cycle is repeated, the removal rate of impurities decreases in one to two years.

[0004] The configuration of a conventional heating and regenerating facility will be described with reference to FIGS. 7 and 8.

[0005] Activated carbon 15-1 is provided in the adsorption equipment 15 shown in FIG. 7 and performs water treatment filtration. Spent activated carbon 19-1
Is carried out by a hoist crane 16, water is taken out by a drain tank 19, transported by a carry-out truck 18, and heated and regenerated
To process. The amount of weight loss at the time of heating regeneration is added with new charcoal 21,
The reclaimed activated carbon 22 is reused in the adsorption equipment 15 by the loading truck 17 again.

FIG. 8 shows an example in which the heating / regenerating apparatus 20 uses city gas. The used coal hopper 23a is mixed with the dilution water 23b, pumped by the slurry transfer pump 23c, drained substantially by the screw dehydrator 23d, and put into the upper part of the regeneration heating furnace 24. At the center rotating link 24c on the side of the multi-stage furnace,
It is raked by the rotating arms of each stage and sequentially moved to the lower stage, heated by the fuel valve 24b using the city gas 24a,
From the upper stage, it is activated by steam 24e in the order of drying ⇒ carbonization ⇒ activation, dropped on quench tank 24f, and stored in regenerated coal tank 24h by slurry transfer pump 24g.
The exhaust gas from the furnace is reheated in the secondary combustion furnace 25,
After cooling at 6, impurities are removed by a scrubber 27 and exhausted from a chimney 29 by an exhaust gas fan 28. Shaft cooling fan 2
4d is for cooling and holding the rotating shaft.

[0007] As can be seen from the above, conventional heating and regeneration equipment for activated carbon using city gas (1) has a large equipment area.

(2) When activated carbon is heated by burning city gas, harmful gas (eg, nitrogen oxide gas such as NOX) is also discharged, so that the equipment for environmentally friendly gas treatment is large and expensive.

(3) Since the activated carbon is heated and steam activated in the lower stage while rotating and scraping off as in a conventional multi-stage furnace, the activated carbon is stirred by high heat, is broken, and the amount of activated carbon is reduced. Was reduced by about 10%, so the regeneration yield was poor.

[0010] Other known external heating regeneration methods include:
For example, the Japan Water Works Association (issued in March 1988) “Advanced Water Supply Technical Data (Activated Carbon Treatment Facility)” describes in detail the regeneration heating method, and the heating source is fuel such as city gas or electricity. Furnace heating is employed.

When city gas is used as a heating source,
As described above, a rotating mechanism is required to homogenize the activated carbon to externally heat it, and a secondary combustor is provided outside, the impurities are separated by a scrubber, and the smoke is exhausted. It is large. In the electric furnace method, an electrode is provided between activated carbons, and electricity is supplied. The activated carbon is heated by Joule heat generated by the resistance of the activated carbon, and the incidental facilities are reduced, but there is a disadvantage that the heating efficiency is poor.

[0012] The conventional external heating and regeneration equipment using city gas has a large equipment area, and particularly large auxiliary equipment for exhaust gas treatment. In addition, since the heating process structure for mechanically scraping the activated carbon is used, the granular (approximately φ1 mm) activated carbon is abraded and powdered, resulting in poor regeneration yield.

On the other hand, JP-A-50-152994, JP-A-53-9293 and JP-A-6-31163 disclose a case in which activated carbon is stored in a container and a microwave oscillator provided outside the container is used. There has been proposed a method of irradiating the activated carbon with microwaves to raise the temperature by the heat generated by the molecular vibration of the particles of the activated carbon, thereby carbonizing the contamination of the activated carbon and using the activated carbon as regenerated activated carbon.

[0014]

However, it is considered that in the conventional microwave heating apparatus, heating occurs in which the regenerated activated carbon becomes uneven, the quality is not uniform, and the yield is deteriorated. In particular, no consideration has been given to the removal of carbonized contamination of the inner pores of activated carbon.

An object of the present invention is to provide a microwave heating apparatus for activated carbon in which the quality and the yield of regenerated activated carbon are improved.

[0016]

In order to achieve this object, a microwave heating method for activated carbon according to a first aspect of the present invention provides a method for heating activated carbon having moisture and dirt and other contaminants from a microwave oscillator. In the method of regenerating spent activated carbon as waste by heating with microwaves, the activated carbon is heated with microwaves, and after stopping the microwave oscillator,
A liquid is sprayed on the heated activated carbon to remove carbides on the surface and inner pores of the activated carbon.

According to a second aspect of the present invention, there is provided a microwave heating control apparatus for an activated carbon, which heats activated carbon having dirt such as moisture and dust with a microwave from a microwave oscillator, and uses the dirt as carbide. In the method of regenerating activated carbon, a reactor having a shape in which microwaves resonate therein, an output window for introducing microwaves from a microwave oscillator provided in the reactor, and an activated carbon in addition to the output window in the reactor were stored. Dispose the storage case, provide a utilization water tank containing liquid at a location corresponding to the output window in the reactor or outside the reactor, provide a pipe communicating between the utilization water tank and the storage case, and install a discharge valve in the piping. After heating the activated carbon with microwaves from the microwave oscillator and carbonizing the filth, the microwave oscillator is turned on by the sequential monitoring and control panel. While stopped, by opening the discharge valve, by spraying liquid from activated water tank to be activated carbon in the housing case, and removing the carbide.

According to a third aspect of the present invention, there is provided a microwave heating control apparatus for activated carbon, comprising: a switch for irradiating each reactor with microwaves from the microwave oscillator between the microwave oscillator and the two reactors. It is provided in claim 2, characterized in that it is provided.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

The principle of microwave generation is basically that a high voltage power supply 1 converts AC 200 V to DC 20 to 25 kV, feeds it to a microwave oscillator 2, generates a hollow electron beam with an electron gun, and generates a high frequency wave in a resonant cavity. The electron beam interacts with the electromagnetic field, and the electron beam is collected by the collector. The generated electromagnetic wave is guided by the waveguide 3 to guide the microwave through the output window 4 of the reactor 5 into the reactor 5.

As a familiar microwave source, a household microwave oven is widely used, and a 2.45 GHz tube is used. In our experiment, microwave heating at 2.45 GHz and 500 W is possible, but since activated carbon is a good conductor of electricity, an arc discharge occurs due to the degree of contact between particles, so that a dispersed arrangement is necessary. The principle of microwave heating is to convert millimeter wave radio wave energy to heat energy,
The larger the intrinsic dielectric loss (tan δ) of the object, the greater the amount of thermal energy conversion.

Since the activated carbon was around tan δ ≒ 0.1, the power loss P0 thermally converted in the dielectric was:

[0023]

P0 = (1 / 1.8) × frequency (f) × electric field strength (V ² ) × relative permittivity (εr) × tan δ × 10 to ¹⁰ (W / cm ³ ) (Equation 1) Thus, when the wet activated carbon was subjected to a heating test at f = 28 GHz, it was found to be about 40 at a microwave power of 2 kW.
The temperature could be uniformly raised to 950 ° C. in minutes. Therefore,
It was found that if the target activated carbon was placed in a portion where the electric field in the reactor was uniform, the reactor was heated uniformly.

[0024]

[Equation 2] Note that the power half-life depth D 深度 3.32 × 10 ⁷ / (f√εr ・ tanδ) (m) (Equation 2) where tanδ ≒ 0.1, where f = 28 GHz is fixed.
In order to uniformly heat the activated carbon of
It was 0 mm. This means that D> 20 in the reactor
When the activated carbon depth was set to 0 mm, it was found that heating was not performed uniformly, and it was found that the activated carbon had a limited mounting arrangement size in the case.

In FIG. 1, the reactor 5 has a cylindrical shape from the resonance shape, and the electric field intensity (W / cm ² ) of the microwave is described at the center YY ′ and XX ′.
The portion immediately below (the left side of XX ′) has a high electric field strength,
As the position moves to the right, a uniform electric field intensity distribution is obtained. Therefore,
By providing the activated carbon 6 in a region where the electric field intensity is uniform, the heating and regeneration temperature control becomes easy, the regeneration heating condition of the activated carbon becomes uniform, and the regeneration quality is stabilized (the temperature of the activated carbon 6 is measured by a thermometer. 9). Storage case 6
The exhaust gas of the activated carbon 6 rises from the upper space 1 and is taken out at the exhaust port 5-3. The lower area of the output window 4 has a high electric field strength and is an empty space 5X where the activated carbon 6 cannot be installed.

As described above, according to the present invention, compared to the case where the activated carbon 6 is disposed in the empty space 5X, the activated carbon 6
Since the uniform electric field intensity was transmitted, the activated carbon 6 was uniformly heated, there was no uneven heating, the quality was uniform, and the product yield of the regenerated activated carbon was improved.

If the activated water tank 7 is disposed in the empty space 5X and used as hot water for steam activation at the final stage of the regeneration step, the activated time can be lengthened, so that the activated carbon can be cleaned well. The hot water in the storage tank 7 is supplied to the water outlet 5-
4 to the outside once through the valve control described later,
The water is again introduced from the water outlet 5-5, and is supplied to the pore water pipe 6-2 arranged at the bottom in the storage case 6-1 to be activated and vaporized.

The microwave output is performed by increasing or decreasing the current of the DC power supply in the high-voltage power supply 1. In order to reduce the microwave power consumption of the utilization water tank 7, the same utilization water is provided outside the reactor 5. The same effect can be obtained even if it becomes a tank and heated inside with an electric heater to make hot water.

FIG. 2 is an explanatory view of the entire configuration of the microwave heating apparatus of the present invention. The activated carbon 6 and the utilization water tank 7 are housed and arranged in the reactor 5. The activated carbon 6 is put in the storage case 6-1.
2, and the opening / closing lid 6-1 is opened to the front side.
-3 and the upper lid 6-4 can insulate and exhaust the gas. In FIG. 2, the water tank 7 is used.
Although the water level in the storage case 6-1 and the water level in the storage case 6-1 are drawn at the same height, the water level in the storage water tank 7 is actually higher than the water level in the storage case 6-1. Has a drop that always flows into the storage case 6-1. The reservoir tank 7 is provided with a water supply valve 7-1 for external replenishment water and a pipe drawn out from the lower part to the discharge valve 7.
-2, water is supplied to the pore water pipe 6-2. The temperature of the regenerated activated carbon 6 is measured by a thermometer 9 and the monitoring control unit 1
2, the current is controlled by the DC generator of the high-voltage power supply 1, and the increase / decrease control of the microwave output is automatically controlled by feedback.

The activated carbon 6 is charged into the activated carbon hopper 10 at the upper part of the reactor, and when the charging valve 10-1 is opened, the activated carbon 6 is naturally dropped inside from the guide 10-2 via the upper lid 6-4. . Exhaust gas due to heating is exhaust 5
-3, and is detoxified by the exhaust gas treatment device 11 and released to the outside. That is, the exhaust gas is mixed (MIX) with ozone gas (from OZN), rendered harmless by an oxidation reaction, then gasified to a low temperature by the ozone-side heat exchanger 11A, and sucked and discharged to the outside by the fan (F). The ozone concentration meter (M) inputs to the ozone generator (OZN) so as to be 0.05 ppm or less, automatically increases or decreases the amount of ozone generated, and mixes and reacts the optimal amount of ozone with (MIX). .

Next, a case will be described in which the sequential monitoring control section 12 shown in FIG. 2 performs the regeneration in accordance with the order of regeneration steps (A to E) for explaining the physical state of the activated carbon 6 shown in FIG.

That is, in the step (A), when the microwave output, for example, Po = 1 kW from the microwave oscillator 2 is turned on, the exhaust gas treatment device 11 starts operating. As shown in FIG. 1, a uniform microwave is applied to the activated carbon 6 except for the empty space 5X. The temperature of the activated carbon 6 is measured by a thermometer 9.

In the step A, since the water content contained in the activated carbon has been evaporated even in the microwave heating, TA = 1
At 00 ° C., water evaporation proceeds. When water evaporation stops,
Although the temperature rises rapidly, since the microwave output is controlled by a control unit described later so that T1 = 500 ° C.,
1 until the moist water contained in the activated carbon is completely evaporated
It is 00 ° C.

When the steam moisture disappears, the temperature rises suddenly and T
When 1 = 500 ° C., the microwave output Po is automatically controlled by the monitoring control unit 12, and the microwave output increases or decreases so that T1 = 500 ° C. becomes constant.

In the step B, TB = 500 ° C., and the deposits on the surface of the activated carbon 6, particularly low-boiling organic substances, are carbonized and desorbed, and carbonized and evaporated. That is, in the step (B), components such as organic substances attached to the activated carbon are desorbed, desorbed and carbonized,
Some are exhausted as exhaust gas.

Next, in the step (C), when the microwave output is increased to Po = 2 kW, for example, the temperature T2 becomes 850 ± 50.
° C. When the constant temperature control starts, the activated carbon deposits are exhausted as oxidizing gas, but the inside of the pores inside the activated carbon particles is hardly exhausted. That is, by increasing the microwave output, T2
= 850 ° C., in the process C, the deposits on the inner pores are further decarbonized, polycondensed, and carbonized and evaporated.

In step (D), the microwave oscillator 2 is stopped by the monitoring control unit 12, the discharge valve 7-2 is opened, and if Po = 0, the water in the water tank 7 already used by microwave heating is discharged. It becomes high temperature water and storage case 6-1 immediately
Hot water spouted from the pore water pipe 6-2 on the lower side of
When sprayed on the heated activated carbon 6, it is immediately steamed and spouts up in the granular activated carbon, while reacting (Cn + H ₂ O) in the pores in the activated carbon particles to be exhausted and activated.

That is, in the process D, when the microwave output is set to zero and hot water is immediately supplied from the utilization water tank 7, steam is immediately blown and the space between the particles of the activated carbon 6 rises, and the exhaust gas is discharged to the exhaust port 5-3. At the time, carbonized deposits on the surface and inner pores of the activated carbon 6 are desorbed and discharged as H ₂ O and CO ₂ gas, and steam cleaning desorption is performed, so that high quality regenerated activated carbon can be produced. it can. That is, the activated carbon 6 is cooled by the microwave power of zero and the high-temperature water spouted from the pore water pipe 6-2, so that the high-temperature water easily penetrates into the inner hole. Therefore, the vaporized water is immediately injected, and the vaporized water is ejected at the vapor pressure, and the carbonized deposits in the inner hole are discharged to the outside together, so that it is possible to produce high-quality regenerated activated carbon in which the inner hole is cleaned. Water may be sprayed on the activated carbon 6, but the activated carbon 6 is cooled by high-temperature water from below with a microwave output of zero, and the temperature decreases. However, since the high-temperature water easily evaporates immediately in the inner hole, water is used. Higher temperature water is more suitable for cleaning and desorption since the activation time is longer without an extra temperature drop.

Further, in the step D, when the discharge valve 7-2 is closed, the steaming stops and the activated carbon which is still dry is kept at 100 ° C.
It can be held as above. In the case where the activated carbon is carried out as dry charcoal and some moisture may remain, the discharge valve 7-2 is turned off at the same time as the microwave output Po is turned off and after a certain time (until RT is reached). It may be closed.

In the cooling step (E), the activated carbon is still activated at a high temperature, so it cannot be carried out of the door 5-1 because it is dangerous. When the gas valve 8-1 is opened (the discharge valve 7-2 is closed), the cooling air diffuses and rises in the activated carbon from the pore water pipe 6-1 to cool it, exhaust the attached gas, and return to room temperature (RT). Become. Then, after opening the opening / closing door 5-1, the opening / closing plate 6-3 of the case is opened to the front side and the activated carbon 6 is scraped out to the carry-out device 13 (the water supply valve 7-1 is kept open to room temperature). However, at that time, the drain valve 5-2 may be opened to drain unnecessary water to the outside. That is, the room temperature (R
When the activated carbon 6 is cooled to room temperature RT by air cooling to cool the activated carbon 6 until T), the regenerated activated carbon can be taken out as a finished product.

In the embodiment shown in FIG. 4, a utilization water tank 7 is disposed outside the reactor 5, and the utilization water tank 7 has an exhaust port 5.
Hot of H ₂ O from -3, the exhaust valve 10-4 exhaust gas such as CO ₂ gas, the hot exhaust gases and lower temperature in the heat exchanger 7A, drain generated for external cold water exhaust box making 7- Collect at 4. The exhaust box 7-4 is provided with an exhaust gas and an automatic drain valve 7-5.
The water is usually separated outside and separated. The water level B of the reservoir water tank 7 is higher than the water level A of the pore water pipe 6-2,
There is a head where water always flows from the utilization water tank 7 to the pore water pipe 6-2.

As a result, the utilized water is turned into warm water, and is sent into the storage case 6-1 through the pore water pipe 6-2 by the discharge valve 7-2. In addition, the utilization water tank 7 is disposed outside the reactor 5 so that measures against microwaves are not required, and ordinary materials such as iron plates can be used instead of expensive materials such as heat insulating materials such as ceramic materials. Not only is it economical, but also the production of the utilized water tank 7 is easy. Further, since the exhaust gas is cooled in the utilization water tank 7, a device having a small capacity can be used as the ozone-side heat exchanger 11A. The exhaust gas from the ozone-side heat exchanger 11A is mixed with a mixer 11B in order to eliminate odors with ozone (OZN) and exhausted to the outside so as not to cause pollution.

Further, by providing the bottom surface of the activation water tank 7 higher (Δh) than the pore water pipe 6-2, the discharge valve 7-2 at the time of the activation step is opened and hot water is supplied to the pore water pipe 6-2. However, since the hot water can be supplied until the natural head is eliminated, a fixed amount of hot water can be supplied without measuring each time, so that the control of the discharge valve 7-2 is simplified.

FIG. 5 shows a case where a single microwave oscillator 2 is provided with a changeover switch, for example, a microwave reflection device 14 in the middle of the waveguide 3, and provided in the reactors 5A and 5B for sequential heating. The left side is a side view and the right side is a plan view. In this case, the carrying-out device is arranged on the side of the open / close doors 5A-1 and 5B-1 of the reactor 5, and the activated carbon that has been regenerated and heated is pulled out by the transport case 13-1 and transported by the transport case 13-1.

On the other hand, when the activated carbon hopper 10 shown in FIG. 2 is omitted, as shown in FIGS.
The activated carbon to be regenerated is put into the transfer case 13-1, and then put into the case inside the reactor 5A with ⇒, and the 5A-1 is closed to start heating regeneration, during which the next activated carbon to be regenerated is ⇒
Then, put in the case of 5B and close 5B-1. When 5A is completed, 5B starts heating regeneration, during which activated carbon is taken out from 5A and transferred with ⇒.

The arrangement described above is suitable for the case where the loading and unloading of the regenerated activated carbon is automated at one end of the reactor. Of course, only the unloading may be performed by the transfer device 13.

As described above, according to the embodiment of the microwave heating method and the control device of the present invention, the following effects can be achieved.

The activated carbon having moisture and dust is heated by microwaves to remove contaminated carbides such as moisture and dust.

Since the heating is performed by the microwave, the activated carbon is not damaged, and the yield of the regenerated activated carbon is good.

Since only the gas generated when the activated carbon is regenerated, no harmful gas such as city gas combustion is generated, which is good for the environment.

Since the activated carbon is merely heated by increasing or decreasing the microwave output without moving the activated carbon,
The processing time for converting the activated carbon into the regenerated activated carbon is shorter than that of the prior art, and the production efficiency of the regenerated activated carbon is good.

[0052]

As described above, according to the present invention, when microwaves are reduced to zero, water or hot water is sprayed on activated carbon in which contamination of the heated surface and inner pores has become carbide to remove the carbide. Thus, it is possible to produce cleaned activated carbon with good quality. Further, the water that has entered the inner hole evaporates, and the evaporated water ejects the evaporating water to discharge the carbide in the inner hole to the outside together, thereby producing a high-quality regenerated activated carbon in which the inner hole is cleaned.

[Brief description of the drawings]

FIG. 1 is a diagram showing a microwave heating apparatus for activated carbon according to one embodiment of the present invention.

FIG. 2 is a diagram illustrating a microwave heating control device used in FIG.

FIG. 3 is a diagram illustrating a regeneration heating order for recycling activated carbon used in a filtration pond.

FIG. 4 is a diagram illustrating a microwave heating control device according to another embodiment of the present invention.

FIG. 5 is a diagram illustrating a changeover switch for switching between a transfer device and a reactor according to another embodiment of the present invention.

FIG. 6 is a time chart for explaining the operation of the changeover switch of FIG. 5;

FIG. 7 is a view for explaining a regenerative heating device for recycling activated carbon used in a conventional filter pond.

FIG. 8 is a diagram illustrating a conventional regeneration heating device.

[Description of Signs] 1 ... High-voltage power supply, 2 ... Microwave oscillator, 3 ... Waveguide, 4
... Output window, 5 ... Reactor, 5-1 ... Opening door, 5-2 ...
Drain valve, 5-3 ... Exhaust port, 5-4 ... Water outlet, 5-5 ...
Water outlet, 5X: Empty space, 6: Activated carbon, 6-1 ...
Storage case, 6-2 ... pore water pipe, 6-3 ... open / close lid,
6-4: Top lid, 6-5: Hinge, 7: Reservoir water tank, 7
-1 ... water supply valve, 7-2 ... discharge valve, 8 ... pneumatic tank, 8
-1: air supply valve, 9: thermometer, 10: activated carbon hopper, 1
0-1: injection valve, 10-2: guide, 11: exhaust gas treatment device, 12: monitoring control unit, 13: transport device, 13-1 ...
Transfer case, 14: microwave reflection device, 15: adsorption equipment, 15-1: activated carbon, 16: hoist crane, 17
... inlet truck, 18 ... outgoing truck, 19 ... drain tank, 19-1 ... used activated carbon, 20 ... heating and regenerating device, 2
DESCRIPTION OF SYMBOLS 1 ... New charcoal, 22 ... Regenerated activated carbon, 23 ... Used carbon processing equipment, 23a ... Used charcoal hopper, 23b ... Dilution water, 23c
... Slurry transfer pump, 23d ... Screw dehydrator,
24: regeneration heating furnace, 24a: city gas, 24b: combustion valve, 24c: rotary link, 24d: shaft cooling fan, 24
e: steam, 24f: quench tank, 24 g: slurry transfer pump, 24 h: regenerated coal tank, 25: secondary combustion furnace, 26: precooler, 27: scrubber, 28: exhaust gas fan, 29: chimney.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiko Okada 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside Kokubu Works, Hitachi, Ltd. (72) Masayuki Yamashita 1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture 1 Hitachi Kokubu Works, Ltd. (72) Inventor Shigeo Shiono 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Hitachi Works Kokubu Works, (72) Inventor Masahiko Oya 2 Tanimachi, Chuo-ku, Osaka, Osaka Chome No. 3-4 F-term in Osaka Prefecture Waterworks Department (reference) 4D024 BA02 BB01 DA07 DB06 4G046 HA09 HC15 HC18

Claims (3)

[Claims] 1. A method for regenerating used activated carbon as a char by heating activated carbon having dirt such as moisture and dust with a microwave from a microwave oscillator. A microwave heating method for activated carbon, characterized in that after the wave oscillator is stopped, a liquid is sprayed on the heated activated carbon to remove carbides on the surface and inner pores of the activated carbon. 2. A method for regenerating spent activated carbon by heating activated carbon having waste such as moisture and dust with microwaves from a microwave oscillator to convert the waste into carbide.
A reactor with a shape that resonates microwaves inside, an output window for introducing microwaves from the microwave oscillator provided in the reactor, and a storage case containing activated carbon besides the output window inside the reactor, the reactor Provide a utilization water tank containing liquid at a location corresponding to the output window inside or outside the reactor, provide a pipe communicating between the utilization water tank and the storage case, provide a discharge valve in the pipe,
After heating the activated carbon with microwaves from the microwave oscillator and carbonizing the filth, the microwave oscillator is stopped by the sequential monitoring and control panel, the discharge valve is opened, and the liquid from the used water tank is stored in the storage case. A microwave heating control apparatus for activated carbon, which sprays activated carbon to remove carbides. 3. The microwave heating control of activated carbon according to claim 2, wherein a switch for irradiating each reactor with microwaves from the microwave oscillator is provided between the microwave oscillator and the two reactors. apparatus.