JP2022011910A - Regeneration method of activated carbon and regenerator of activated carbon - Google Patents

Abstract

To provide a regeneration method of activated carbon capable of reducing more than ever a use amount of inert gas used when regenerating activated carbon and an activated carbon regenerator.SOLUTION: A regeneration method of activated carbon in which inert gas is heated and supplied to the activated carbon tower filled with the activated carbon to which an organic substance is absorbed, followed by flowing the heated inert gas into the activated carbon tower, or, the activated carbon is directly heated, the inert gas is flown into the heated activated carbon tower to heat the activated carbon to regenerate the activated carbon, in which a step of executing a treatment that inhales at least a part of the inert gas exhausted from the activated carbon tower, by an ejector that makes the inert gas supplied from the inert gas supply source into a driving fluid and circulates to the activated carbon tower to reuse to heat the activated carbon.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for regenerating activated carbon and an apparatus for regenerating activated carbon.

Conventionally, as a method of regenerating activated carbon on which an organic substance is adsorbed, a method of supplying a heating gas such as steam to an activated carbon tower containing the activated carbon to heat the activated carbon to desorb the adsorbed organic substance or reactivate the activated carbon. It is used.

For example, Patent Document 1 discloses a water treatment apparatus that allows a high-temperature heating gas to flow through an adsorbent element in order to desorb an organic substance adsorbed on the adsorbent element containing activated carbon as an adsorbent.

Japanese Unexamined Patent Publication No. 2006-55712

However, when the activated carbon is regenerated using an inert gas as the heating gas, the gas cost accounts for a large proportion of the running cost of the activated carbon regenerating device, and it is desired to reduce the amount used.

An object of the present invention is to provide an activated carbon regeneration method and an activated carbon regeneration apparatus capable of reducing the amount of the inert gas used when regenerating activated carbon as compared with the conventional case.

In the present invention, an inert gas is heated and supplied to an activated carbon tower filled with activated carbon adsorbed with an organic substance, and the heated inert gas is circulated in the activated carbon tower, or the activated carbon tower is directly connected. It is a method of regenerating activated carbon that is heated and the activated carbon is circulated in the heated activated carbon tower to heat and regenerate the activated carbon, and drives the activated gas supplied from the inert gas supply source. An activated carbon having a step of sucking at least a part of the inert gas discharged from the activated carbon tower by an ejector as a fluid, circulating the activated carbon in the activated carbon tower, and executing a process of reusing the activated carbon for heating. Regarding the playback method.

Further, in the step of heating and regenerating the activated carbon, the inert gas sucked into the ejector is subjected to a gas-liquid separation operation for separating the gas and the liquid before being sucked into the ejector, and the activated carbon is used as the gas. It is preferable that only the separated inert gas is sucked into the ejector, circulated in the activated carbon column, and reused for heating the activated carbon.

Further, after a treatment in which at least a part of the inert gas discharged from the activated carbon tower is sucked and circulated and reused for heating the activated carbon, the circulation of the inert gas by the ejector is stopped, and the circulation of the inert gas is stopped. It is preferable to carry out the treatment of supplying only the inert gas supplied from the inert gas supply source to the activated carbon column.

Further, in the present invention, the inert gas is heated and supplied to the activated charcoal tower filled with the activated charcoal on which the organic substance is adsorbed, and the heated inert gas is circulated in the activated charcoal tower to heat the activated charcoal. In a method for regenerating activated charcoal, the inert gas is brought into the inside of the filled layer of the activated charcoal by an inert gas supply pipe in which the injection portion of the inert gas is located inside the filled layer of the activated charcoal. The inert gas supply pipe has a heating step of being directly supplied, and has an inert gas injection pipe as the injection portion, which extends in a direction substantially perpendicular to the direction in which the inert gas flows inside the packed bed of the activated charcoal. However, the inert gas relates to a method for regenerating activated charcoal, which is injected in the inert gas injection pipe in a certain direction of the inert gas discharge port of the activated coal tower.

Further, the inert gas injection pipe is preferably located within 10% from the end face of the packed layer of the activated carbon located on the opposite side of the inert gas discharge port of the activated carbon tower toward the inert gas discharge port. ..

Further, in the present invention, an inert gas is heated and supplied to an activated carbon tower filled with activated carbon adsorbed with an organic substance, and the heated inert gas is circulated in the activated carbon tower, or the activated carbon tower is used. Is a method for regenerating activated carbon by directly heating the activated carbon and circulating the activated carbon in the heated activated carbon tower to heat and regenerate the activated carbon. The activated carbon supplied from the activated carbon supply source. At least a part of the activated carbon discharged from the activated carbon tower is sucked by an ejector using The inert gas supply pipe has a heating step in which the inert gas is directly supplied to the inside of the activated carbon packed bed by an inert gas supply pipe whose portion is located inside the activated carbon packed bed. As the injection unit, the activated carbon injection pipe has an inert gas injection pipe extending in a direction substantially perpendicular to the direction in which the activated carbon flows inside the packed layer of the activated carbon, and the activated carbon is the activated carbon tower in the activated carbon injection pipe. The present invention relates to a method for regenerating activated carbon injected in a certain direction of an inert gas discharge port.

Further, the inert gas is preferably water vapor.

Further, in the heating step, it is preferable that the inert gas is heated so that the temperature of the inert gas supplied to the activated carbon is 100 ° C. or higher and 600 ° C. or lower.

Further, according to the present invention, an activated carbon tower accommodating activated carbon, a supply line for supplying the activated carbon tower with an inert gas, and a heating means arranged in the supply line to heat the inert gas supplied to the activated carbon tower. Or, a heating means for directly heating the activated carbon tower, a discharge line for discharging the inert gas from the activated carbon tower, and at least a part of the inert gas discharged from the discharge line are circulated to the supply line. A circulation line and an ejector that uses an inert gas supplied from an inert gas supply source as a driving fluid and sucks at least a part of the inert gas discharged from the activated carbon tower to circulate in the activated carbon tower. The present invention relates to an activated carbon regeneration device.

Further, according to the present invention, an activated carbon tower accommodating activated carbon, a supply line for supplying the activated carbon tower with an inert gas, and a heating means arranged in the supply line to heat the inert gas supplied to the activated carbon tower. The activated carbon supply is provided with a discharge line for discharging the inert gas from the activated carbon tower, and an inert gas supply pipe in which the injection portion of the activated carbon is located inside the packed layer of the activated carbon. The pipe has, as the injection portion, an inert gas injection pipe extending in a direction substantially perpendicular to the direction in which the inert gas flows inside the packed layer of the activated carbon, and the inert gas is said in the inert gas injection pipe. The present invention relates to an activated carbon regeneration device that is injected in a certain direction of an activated carbon discharge port of an activated carbon tower.

According to the present invention, the amount of the inert gas used when regenerating activated carbon can be reduced as compared with the conventional case.

It is a figure which shows the structure of the activated carbon regeneration apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the place where the temperature sensor is installed in the activated carbon tower in the activated carbon regeneration apparatus which concerns on 1st Embodiment of this invention. It is a graph which shows the relationship between the amount of steam used and the temperature change in the heating test in the activated carbon regeneration apparatus which concerns on the prior art. It is a graph which shows the relationship between the amount of steam used in the heating test in the activated carbon regeneration apparatus which concerns on 1st Embodiment of this invention, and a temperature change. It is a figure which shows the structure of the activated carbon tower included in the activated carbon regeneration apparatus which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the activated carbon tower included in the activated carbon regeneration apparatus which concerns on the prior art. It is a graph which shows the relationship between the amount of steam used and the temperature change in the heating simulation in the activated carbon regeneration apparatus which concerns on 2nd Embodiment of this invention. It is a graph which shows the relationship between the amount of steam used and the temperature change in the heating simulation in the activated carbon regeneration apparatus which concerns on the prior art. It is a figure which shows the structure of the heating means of the activated carbon tower which concerns on embodiment of this invention. It is a figure which shows the structure of the heating means of the activated carbon tower which concerns on embodiment of this invention. It is a figure which shows the structure of the heating means of the activated carbon tower which concerns on embodiment of this invention.

[1 First Embodiment]
Hereinafter, the activated carbon regeneration device 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

[1.1 Configuration of Embodiment]
FIG. 1 shows the configuration of the activated carbon regeneration device 1 according to the present embodiment. The activated charcoal regenerating device 1 is discharged from the activated charcoal tower 2 accommodating the activated charcoal, the inert gas supply line L1 whose upstream side is connected to the inert gas supply source and supplies the inert gas to the activated charcoal tower 2, and the activated charcoal tower 2. The inert gas discharge line L2 through which the inert gas flows, the circulation line L3 that circulates a part of the inert gas flowing through the inert gas discharge line L2 to the inert gas supply line L1, and the circulation line L3. The ejector 3 which is arranged at the connection portion with the active gas supply line L1 and uses the inert gas flowing through the circulation line L3 as the suction fluid and the inert gas supplied from the inert gas supply source as the driving fluid, and the upstream side A condensate discharge line L4 connected to the circulation line L3 is provided.

The activated carbon tower 2 accommodates activated carbon and adsorbs and filters organic substances contained in raw water by filtration using the activated carbon. Hereinafter, the activated carbon tower 2 will also be referred to as a “filtration tower 2”.

The activated carbon tower 2 is not particularly limited as long as it can accommodate activated carbon and can flow water or a fluid having a temperature of 200 ° C. or higher, but in order to improve the heating efficiency of the activated carbon, a heating device such as a heater or the like can be used. It may be a fixed bed type including a heat fluid supply pipe or a heat conductor such as a metal rod, or a fluid bed type such as a rotary kiln. Alternatively, the activated carbon may be divided and housed in a plurality of thin tubes to be modularized into one filtration tower, and the activated carbon may be indirectly heated by a heater or a thermal fluid from the outside of the thin tubes. Further, the activated carbon tower 2 may have a backwashing mechanism and a function of switching the water flow direction. Furthermore, after installing two or more such activated carbon towers 2 in parallel or in series, other components are shared, and the lines are switched as appropriate to operate with a time difference such as the merry-go-round method at the timing of water flow and regeneration. You may.

9A-9C are diagrams showing an example of a method of directly heating the activated carbon tower 2 as described above. For example, as shown in FIG. 9A, a branched heating pipe 23 and a super heater 24 are installed in the activated carbon tower 2, and the super heater 24 fills the activated carbon tower 2 via the branched heating pipe 23. The activated carbon 25 may be heated.

Alternatively, as shown in FIG. 9B, an infrared heater 26 such as a ceramic heater or a halogen heater is installed in the activated carbon tower 2, and the activated carbon 25 is surrounded by an infrared reflective material 27 such as aluminum. The activated carbon 25 filled in the activated carbon tower 2 may be heated.

Alternatively, as shown in FIG. 9C, a thin tube 28 filled with activated carbon 25 wound with a surface heater 29 is modularized, and this module 30 and the water supply / steam / treated water / waste steam distribution / water collection unit 31 are modularized. The activated carbon 25 may be heated by forming the activated carbon tower 2 with the above.

Alternatively, although not shown, the activated carbon filled in the activated carbon tower 2 may be heated by microwave heating or high-frequency dielectric heating.

When the activated carbon tower 2 contains a heating device such as a heater or a heat conductor such as a metal rod, or when the activated carbon is indirectly heated by a heater or a thermal fluid from the outside of a modularized thin tube, the activated carbon tower 2 is used. Since it is directly heated, it is not necessary to heat the inert gas in advance in the supply of the inert gas, and the heating means for heating the inert gas such as the heater 5 described later on the inert gas supply line L1. It is not necessary to install.

Further, the activated coal tower 2 is provided with a monitoring system for absorbance, pH, electrical conductivity, temperature, chromaticity, turbidity, odor, surface tension, TOC, tracer, etc., so that water supply, treated water, exhaust steam and condensation can be achieved. While continuously or intermittently monitoring the liquid, it may be possible to feedback-control the timing of transition to each treatment and the treatment conditions such as the temperature and time of each treatment.

Further, the type of this "activated carbon" is not particularly limited, but activated carbon having many relatively large pores facilitates desorption of organic substances. For example, it is more preferable that the activated carbon has a methylene blue adsorption capacity of 250 mL / g or more, more preferably 300 mL / g or more, as defined in JIS K 1474.

As the raw material of this "activated carbon", coal, coconut husk, wood, fiber, and resin are preferable from the viewpoint of distribution and versatility, and from the viewpoint of suppressing the generation of pulverized coal after regeneration as much as possible, coal with high toughness is used as the raw material. Coal charcoal and coconut husk charcoal made from coconut husk are more suitable.

As the shape of this "activated carbon", granular activated carbon is preferable from the viewpoint of suppressing water flow in the activated carbon tower 2 and pressure loss of the regenerated gas, and obtaining good expandability and outflow prevention effect during backwashing, and the average particle size is preferable. It is more preferable that the amount is 0.5 mm or more of granular activated carbon.

Further, two or more types of activated carbon and an adsorbent other than activated carbon such as alumina, silica gel, and zeolite may be filled or mixed in multiple stages and accommodated in the activated carbon tower 2.

The inert gas supply line L1 includes a first inert gas supply line L11 and a second inert gas supply line L12, and the first inert gas supply line L11 and the second inert gas supply line L12. The ejector 3 is arranged between them.

The pressure regulating valve 4, the first flow meter FM1, and the first pressure sensor PS1 may be arranged in order from the upstream on the first inert gas supply line L11.

The pressure regulating valve 4 is a valve that regulates the supply pressure of the inert gas G1 supplied from the inert gas supply source to the ejector 3. The pressure regulating valve 4 is preferably provided with a mechanism capable of keeping the supply pressure to the ejector 3 constant even if the pressure of the inert gas supply source fluctuates. Specifically, the pressure reducing valve and the first pressure sensor PS1 And a proportional valve that automatically adjusts the opening while reading the value of the first flow meter FM1.

The "inert gas" may be any gas that does not decompose activated carbon at a temperature lower than 600 ° C., and examples thereof include steam, nitrogen, carbon dioxide, noble gas, exhaust gas discharged from a boiler, an incineration facility, and the like. , Steam is more suitable from the viewpoint of gas unit price and gas purity.

The first flow meter FM1 is a device for measuring the flow rate of the inert gas G1 flowing through the first inert gas supply line L11. The first flow meter FM1 is electrically connected to a control device (not shown). The control device may acquire the flow rate information of the inert gas G1 based on the measured value of the first flow meter FM1.

The first pressure sensor PS1 is a device that measures the supply pressure of the inert gas G1, which is the driving fluid, to the ejector 3 as the driving side pressure of the ejector 3. The first pressure sensor PS1 may be electrically connected to the control device. The control device may acquire drive-side pressure information of the ejector 3 based on the measured value of the first pressure sensor PS1.

In the ejector 3, the inert gas G6 flowing through the circulation line L3 is used as a suction fluid, the inert gas G1 flowing through the first inert gas supply line L11 is used as a driving fluid, and the inert gas G2 is used as a second inert gas. It is an ejector that discharges to the supply line L12. More specifically, the ejector 3 flows through the circulation line L3 by the flow of the inert gas G1 flowing through the first inert gas supply line L11 after the supply pressure to the ejector 3 is adjusted by the pressure regulating valve 4. The inert gas G6 is sucked in, mixed with each other, and discharged as the inert gas G2 to the second inert gas supply line L12.

The inert gas G6 sucked into the ejector 3 is subjected to a gas-liquid separation operation for separating the gas and the liquid before being sucked into the ejector 3, and only the inert gas separated as a gas is sucked into the ejector 3. It may be.

The second pressure sensor PS2, the second flow meter FM2, and the heater 5 may be arranged in order from the upstream on the second inert gas supply line L12.

The second pressure sensor PS2 is a device that measures the discharge pressure of the inert gas G2, which is the discharge fluid, from the ejector 3 as the discharge side pressure of the ejector 3. The second pressure sensor PS2 may be electrically connected to the control device. The control device may acquire the discharge side pressure information of the ejector 3 based on the measured value of the second pressure sensor PS2.

The second flow meter FM2 is a device for measuring the flow rate of the inert gas G2 flowing through the second inert gas supply line L12. The second flow meter FM2 may be electrically connected to the control device. The control device may acquire the flow rate information of the inert gas G2 based on the measured value of the second flow meter FM2.

The heater 5 is a device for heating the inert gas G2 flowing through the second inert gas supply line L12. The heater 5 is preferably heated so that the temperature of the inert gas G2 is 100 ° C. or higher and 600 ° C. or lower.

Specific examples of the heater 5 include direct heating devices such as cartridge heaters, flange heaters, infrared heaters, tape heaters, and ceramic heaters, or indirect heating devices such as induction heating devices, dielectric heating devices, and microwave heating devices. Be done. Further, a safety device such as a temperature sensor or a temperature fuse may be attached to the heater 5 to prevent overheating. The heater 5 may be attached anywhere as long as it can heat the inert gas and is in the circulation flow path of the inert gas, but in order to reduce heat dissipation, it is located closer to the upstream side of the activated carbon tower 2 or the activated carbon tower. It is preferably inside 2. Further, a plurality of heaters may be installed as the heater 5.

The circulation line L3 is connected to the inert gas discharge line L2 at the connection portion J1. The inert gas G3, which is a part of the inert gas flowing through the inert gas discharge line L2, circulates through the circulation line L3. Further, the remaining inert gas G4 is discharged to the outside of the system after flowing on the downstream side of the connection portion J1 in the inert gas discharge line L2. The on-off valve 6, the check valve 7, and the third pressure sensor PS3 may be arranged on the circulation line L3 in order from the upstream, but the order of the on-off valve 6 and the check valve 7 may be reversed.

At the connection portion J2 upstream of the on-off valve 6 of the circulation line L3, the condensate discharge line L4 is connected to the circulation line L3. The inert gas circulated in the activated charcoal regenerator 1 contains steam used as the inert gas, or water and organic components vaporized from the activated charcoal by heating, and when the circulated inert gas is cooled by heat dissipation or the like, Some of these water and organic components are liquefied as a condensate. The condensate discharge line L4 is a line for discharging the condensate. A gas-liquid separation device 8 as a device for performing a gas-liquid separation operation may be arranged on the condensate discharge line L4.

The gas-liquid separation device 8 is a device that discharges the condensed liquid G5 generated by condensing the low boiling point component contained in the inert gas G3 flowing through the circulation line L3, and prevents the discharge of the inert gas as a gas. .. As the gas-liquid separation device 8, various separators such as gravity type, centrifugal type, and surface tension type, and steam traps may be used as the device for performing the gas-liquid separation operation.
The gas-liquid separation device 8 may be integrated with the condensate discharge line L4.

The on-off valve 6 is a valve that is opened and closed to control the flow of the inert gas G6 on the circulation line L3. More specifically, a part of the inert gas G3 flowing through the circulation line L3 is discharged as the condensed liquid G5, but the on-off valve 6 is used to control the flow of the remaining inert gas G6. It is a valve that opens and closes. By opening the on-off valve 6, the inert gas G6, which is a part of the inert gas flowing through the inert gas discharge line L2, flows through the circulation line L3, and the inert gas is generated in the system of the activated carbon regeneration device 1. It circulates. On the other hand, by closing the on-off valve 6, the inert gas G6 does not flow through the circulation line L3, and the circulation of the inert gas in the system of the activated carbon regeneration device 1 is stopped.

The check valve 7 is a valve that prevents the backflow of the inert gas G6 on the circulation line L3.

The third pressure sensor PS3 is arranged after the check valve 7 in the circulation line L3. The third pressure sensor PS3 is a device that measures the suction pressure of the inert gas G6 into the ejector 3 as the suction side pressure of the ejector 3. The third pressure sensor PS3 may be electrically connected to the control device. The control device may acquire the suction side pressure information of the ejector 3 based on the measured value of the third pressure sensor PS3.

[1.2 Operation of the embodiment]
In the activated carbon regeneration device 1, an activated carbon is heated and supplied to an activated carbon tower 2 filled with activated carbon to which an organic substance is attached, and the heated inert gas is circulated in the activated carbon tower 2 or the activated carbon tower 2 is used. Activated carbon is regenerated by directly heating 2 and circulating an inert gas in the heated activated carbon tower 2 to heat the activated carbon.

In particular, the activated carbon regeneration device 1 includes a circulation line L3, and a part of the inert gas discharged from the activated carbon tower 2 is circulated as the inert gas G3 in the circulation line L3. Further, an ejector 3 is arranged at a connection point between the circulation line L3 and the first inert gas supply line L11 through which the inert gas G1 supplied from the inert gas supply source flows, and the ejector 3 is the inert gas G1. Is used as a driving fluid, the inert gas G6 flowing through the circulation line L3 is sucked in, the two are mixed, and the inert gas G2 is discharged to the second inert gas supply line L12. The inert gas G2 is supplied to the activated carbon tower 2 via the second inert gas supply line L12.

This makes it possible to reduce the amount of the inert gas used when regenerating the activated carbon by circulating a part of the inert gas used for heating the activated carbon and using it again for heating the activated carbon. .. Further, by using the ejector 3 as a means for circulating a part of the inert gas, a power supply device and an electricity bill are not required as compared with the case where the inert gas is circulated by an electrically operated blower or a pump. ..

When the activated coal tower 2 is directly heated, the inert gas does not have to be heated in advance in the supply of the inert gas, and the inert gas is heated on the second inert gas supply line L12. The means (heater 5) does not have to be installed.

Further, after the treatment of sucking and circulating at least a part of the inert gas discharged from the activated carbon tower 2 and reusing it for heating the activated carbon, the circulation of the inert gas by the ejector 3 is stopped and the inert gas is supplied. The process of supplying only the inert gas supplied from the source to the activated carbon tower 2 may be executed. Further, the operation of heating by the circulation of the inert gas by the ejector 3 and the heating by only the inert gas supplied from the inert gas supply source may be repeated a plurality of times.

[1.3 Heating test]
A heating test of the activated carbon regeneration device 1 was performed under the following test conditions.
That is, 400 L of activated carbon as a filter medium was filled in the activated carbon tower 2, and temperature sensors (thermocouples) TC1 to TC14 were installed at the filled points of the activated carbon. FIG. 2 shows the location where the temperature sensor is installed. As shown in FIG. 2, in the activated carbon tower 2, the temperature sensors TC1, TC3, TC5, TC7, TC9, TC11, TC13 are equally spaced from the shallow position to the deep position in the central part in the horizontal direction among the filled points of the activated carbon. Was installed. Further, the temperature sensors TC2, TC4, TC6, TC8, TC10, TC12, and TC14 were installed at equal intervals from the shallow position to the deep position near the outer peripheral portion of the activated carbon tower 2 among the filling points of the activated carbon.

After that, water was replenished to a predetermined height of the activated carbon tower 2, and the water in the activated carbon tower 2 was naturally dropped.

Then, with the on-off valve 6 closed, the supply amount of the driving steam, that is, the inert gas (steam) G1 in FIG. 1 is set to 50 kg / h, and the inert gas (steam) G2 is supplied by the heater 5. It was heated to 400 ° C., and the temperature inside the activated coal tower 2 was measured by temperature sensors (thermocouples) TC1 to TC14.
When the temperature of the temperature sensors (thermocouples) TC 13 and 14 indicates 100 ° C., the exhaust steam starts to be discharged from the activated coal tower 2, and at this stage, the on-off valve 6 is opened and the circulating steam, that is, the inert gas (steam) of FIG. 1 is opened. ) The supply amount of G6 was set to 50 kg / h.
In this case, the amount of the inert gas (steam) G2 supplied to the activated coal tower 2 via the heater 5 is 100 kg / h, and the inert gas is discharged from the inert gas discharge line L2 to the outside of the system. The emission amount of gas (steam) G4 is 50 kg / h.

On the other hand, as a comparative example showing the prior art, the supply amount of the inert gas (steam) G1 in FIG. 1 is set to 100 kg / h with the on-off valve 6 closed, and the inert gas (steam) is used in the heater 5. G2 was heated to 400 ° C., and the temperature inside the activated coal tower 2 was measured by temperature sensors (thermocouples) TC1 to TC14. In this case, the amount of the inert gas (steam) G2 supplied to the activated coal tower 2 via the heater 5 is 100 kg / h, and the inert gas is discharged from the inert gas discharge line L2 to the outside of the system. The emission amount of gas (steam) G4 is also 100 kg / h.

FIG. 3 shows the relationship between the amount of steam used in the prior art and the temperature measured by each temperature sensor. Here, the "steam amount used" is a cumulative value of the steam amount of the inert gas (steam) G1 measured by the first flow rate sensor FM1.

As shown in FIG. 3, as the amount of steam used increases, the temperature measured by each temperature sensor rises to about 350 ° C. in order from the temperature sensor installed on the upper layer of the activated carbon deposited on the activated carbon tower 2, and then. The graph remains flat at approximately 350 ° C. Further, in the graph of FIG. 3, when the amount of steam used reaches about 660 kg, the temperatures of TC13 and TC14, which are the temperature sensors installed in the lowest layer among the temperature sensors installed in the activated carbon tower 2, are measured. , Approximately 350 ° C.

On the other hand, FIG. 4 shows the relationship between the amount of steam used in this embodiment and the temperature measured by each temperature sensor. In addition, in FIG. 4, "the amount of steam used" is the cumulative value of the amount of steam of the inert gas (steam) G1 measured by the first flow rate sensor FM1 as in FIG. 3, but this is an ejector. It is the integrated steam amount on the drive side of 3.

Also in FIG. 4, as in FIG. 3, the amount of steam used increases, and the temperature measured by each temperature sensor reaches approximately 350 ° C. in order from the temperature sensor installed on the upper layer of the activated carbon deposited on the activated carbon tower 2. After rising, the graph remains flat at approximately 350 ° C. However, in the graph of FIG. 4, when the amount of steam used reaches approximately 330 kg, the temperatures of TC13 and TC14, which are the temperature sensors installed in the lowest layer among the temperature sensors installed in the activated carbon tower 2, are measured. , Approximately 350 ° C.

That is, in the present embodiment, it was shown that the amount of steam used for the temperature of the entire activated carbon tower 2 to rise completely is about half of the amount of steam used in the prior art.

[1.4 Effects of the first embodiment]
In the method for regenerating activated carbon according to the present embodiment, an activated carbon is heated and supplied to an activated carbon tower 2 filled with activated carbon adsorbed with an organic substance, and the heated inert gas is distributed in the activated carbon tower 2. Alternatively, it is a method for directly heating the activated carbon tower 2 and circulating an inert gas in the heated activated carbon tower 2 to heat the activated carbon and regenerate the activated carbon, which is supplied from the activated carbon supply source. A step of sucking at least a part of the inert gas discharged from the activated carbon tower 2 by the ejector 3 using the inert gas as a driving fluid, circulating it in the activated carbon tower 2, and executing a process of reusing it for heating the activated carbon. Have.

By circulating a part of the inert gas used for heating the activated carbon and using it for heating the activated carbon again, it is possible to reduce the amount of the inert gas used when regenerating the activated carbon. Further, by using the inert gas, even if the activated carbon is heated above the ignition point, the event that the activated carbon burns does not occur. In addition, compared to the case of using an electrically operated blower, pump, or the like as a means for circulating the inert gas, the use of the ejector 3 eliminates the need for a power supply device or an electricity bill for circulating the inert gas. Become. Furthermore, when using a blower or pump, there is always a risk of failure such as sticking of sliding parts and thermal damage of electrical parts, and a risk of electric leakage and overcurrent, but in the case of circulation by an ejector, these risks are It doesn't exist at all. In addition, since the circulating gas plays a role as a carrier for the heating medium and the desorbed organic matter, if the circulating gas dissipates heat in the circulation flow path or the heat is taken away by the constituent members, the energy efficiency is lowered and the desorbed organic matter is desorbed. Invites the risk of adhesion. Therefore, it is desirable to suppress heat dissipation in the circulation flow path, but since the structure of blowers and pumps is complicated and intake and cooling are required to protect electrical parts, it is difficult to wind heat insulating material, rather it is impossible. If heat is insulated, the electrical parts will be damaged due to heat, but in the case of an ejector, heat insulation can be applied, or heating can be performed with a surface heater or the like.

When the activated carbon tower 2 is directly heated, the heating efficiency can be improved because there is almost no heat dissipation on the inert gas supply line L1. Further, by passing the inert gas through the directly heated activated carbon tower 2, the organic matter desorbed by heating can be discharged to the outside of the filtration tower 2.

Further, in the step of heating and regenerating the activated carbon, the inert gas G6 sucked into the ejector 3 is separated as a gas by performing a gas-liquid separation operation for separating the gas and the liquid before being sucked into the ejector 3. Only the inert gas may be sucked into the ejector 3 and circulated in the activated carbon tower 2 to be reused for heating the activated carbon.

When the activated carbon is heated by the inert gas, the water and organic substances adsorbed on the activated carbon are vaporized, and the inert gas discharged from the activated carbon tower 2 contains water vapor and gaseous organic substances. That is, if the gas-liquid separation operation is not performed, the gaseous organic matter will circulate together with the inert gas, and the organic matter desorbed from the activated carbon will be introduced into the activated carbon tower 2 again and re-introduced into the activated carbon. There is a possibility that it may adhere or adhere to the circulation piping system including the ejector 3. The reattachment of organic matter to the activated carbon leads to a decrease in desorption efficiency, and the adhesion of organic matter to the circulation piping system leads to an obstacle to the long-term operation of the activated carbon regeneration device 1.
Further, before being sucked into the ejector 3, the circulating gas dissipates heat or the heat is taken away by the constituent members, so that water vapor and a part of the gaseous organic matter are cooled to become a condensed / mixed liquid. The organic substance in the state can be partially dissolved in the mixed solution.
Therefore, by utilizing this phenomenon and further performing a gas-liquid separation operation, the amount of organic substances contained in the inert gas can be reduced by circulating the inert gas after separating and discharging this mixed liquid. , The above risks can be reduced.

Further, after the treatment of sucking and circulating at least a part of the inert gas discharged from the activated carbon tower 2 and reusing it for heating the activated carbon, the circulation of the inert gas by the ejector 3 is stopped and the inert gas is supplied. The process of supplying only the inert gas supplied from the source to the activated carbon tower 2 may be executed.

While the inert gas is circulated, a part of the organic matter desorbed from the activated carbon is also circulated in the vaporized state. Therefore, if the regeneration process is completed only by circulating heating and the activated carbon tower 2 is cooled, The organic matter vaporized in the activated carbon tower 2 reattaches to the activated carbon.
In this respect, this problem can be solved by replacing the gas in the filtration column with only the high-purity inert gas supplied from the inert gas supply source. Further, this replacement operation may be repeated a plurality of times during heating, whereby the concentration of organic matter in the circulating gas can be reduced each time, and the reattachment of desorbed organic matter during heating can be suppressed.
The supply of only this high-purity inert gas is not supplied from the inert gas source, but the liquid water is sprayed on the activated charcoal in a high temperature state, and the steam as the inert gas is supplied to the activated coal tower. It may be generated and supplied within 2. In this case, the amount of inert gas used can be further reduced, and the latent heat of vaporization is removed from the activated carbon when the sprayed water evaporates, thereby accelerating the cooling of the activated carbon, thereby accelerating the time required for the filtration process and filtering. It also greatly contributes to improving the operability of the tower.
Furthermore, when regeneration is performed under heating conditions that exceed the ignition temperature of the activated carbon (about 250 ° C.), the pressure becomes negative as the activated carbon cools, and when air is mixed in the filtration tower 2, the activated carbon ignites. Invite. On the other hand, even when the activated carbon is heated below the ignition temperature, when the inert gas is naturally cooled without being supplied to the activated carbon tower 2, it takes time to cool the activated carbon until the normal adsorption treatment becomes possible.
In this respect, by supplying only the inert gas at room temperature supplied from the inert gas supply source to the activated carbon tower 2, it is possible to quickly cool the activated carbon while avoiding the mixing of air.

Further, the inert gas may be water vapor.

Hydrolysis using water vapor makes it possible to reduce the molecular weight of organic substances adsorbed on activated carbon, and lowering the molecular weight makes it possible to lower the boiling point and improve the desorption efficiency. In addition, since the organic matter in the exhaust vapor and the condensed liquid in which the exhaust vapor is condensed is reduced in molecular weight, it becomes easier for microorganisms to nourish the organic matter, and the biodegradability of the exhaust vapor and the condensed liquid is improved, so that biological treatment can be performed. It will be easy. Furthermore, large-scale wastewater treatment equipment is not required because the treatment takes time, management is troublesome, and the load of biological treatment that requires a large site can be reduced.

Further, in the heating step, the inert gas may be heated so that the temperature of the inert gas supplied to the activated carbon is 100 ° C. or higher and 600 ° C. or lower.

When the inert gas is steam, if the temperature of the inert gas is less than 100 ° C, not only the heating effect due to the heat transfer of condensation obtained when the steam condenses cannot be obtained, but also water in a partially liquid state is used in the activated carbon tower. It will be introduced in the above, and the heating efficiency of activated carbon will decrease. By setting the temperature of the inert gas to 100 ° C. or higher, it is possible to suppress the occurrence of such an event. Further, by setting the heating temperature of the activated carbon to 600 ° C. or lower, it is possible to suppress the change and consumption of the pore characteristics of the activated carbon due to the activation reaction.

The activated carbon regeneration device according to the present embodiment is arranged in the activated carbon tower 2 for accommodating the activated carbon, the inert gas supply line L1 for supplying the activated carbon to the activated carbon tower 2, and the activated carbon supply line L1. A heater 5 that heats the inert gas supplied to 2, a heating means that directly heats the activated carbon tower 2, an inert gas discharge line L2 that discharges the inert gas from the activated carbon tower 2, and an inert gas discharge line. A circulation line L3 that circulates at least a part of the inert gas discharged from L2 to the activated carbon supply line L1 and an activated carbon supplied from the inert gas supply source as a driving fluid, and from the activated carbon tower 2. It is provided with an ejector 3 that sucks in at least a part of the discharged inert gas and circulates in the activated carbon tower.

By circulating a part of the inert gas used for heating the activated carbon and using it for heating the activated carbon again, it is possible to reduce the amount of the inert gas used when regenerating the activated carbon. Further, by using the inert gas, even if the activated carbon is heated above the ignition point, the event that the activated carbon burns does not occur. In addition, compared to the case of using an electrically operated blower, pump, or the like as a means for circulating the inert gas, the use of the ejector 3 eliminates the need for a power supply device or an electricity bill for circulating the inert gas. Become. Furthermore, when using a blower or pump, there is always a risk of failure such as sticking of sliding parts and thermal damage of electrical parts, and a risk of electric leakage and overcurrent, but in the case of circulation by an ejector, these risks are It doesn't exist at all. In addition, blowers and pumps have a complicated structure and require intake and cooling to protect electrical parts, so it is difficult to wind heat insulating material. Rather, if heat is forcibly insulated, electrical parts will fail due to heat. However, in the case of an ejector, heat insulation can be provided, or heating can be performed with a surface heater or the like.

[2 Second Embodiment]
Hereinafter, the activated carbon regeneration device 1A according to the second embodiment of the present invention will be described with reference to FIGS. 5 to 8. In the following description, for the sake of simplification of the description, among the elements constituting the activated carbon regeneration device 1A according to the second embodiment, the same components as the activated carbon regeneration device 1 according to the first embodiment are the same. It is shown by the reference numeral of, and the description thereof will be omitted.

[2.1 Configuration of Embodiment]
FIG. 5 shows the configuration of the activated carbon regeneration device 1A according to the present embodiment. Unlike the activated charcoal regenerating device 1, the activated charcoal regenerating device 1A has a circulation line L3, an on-off valve 6 installed in the circulation line L3, a check valve 7, a condensate discharge line L4, and a gas / liquid installed in the condensate discharge line L4. It does not include a separator 8, an ejector 3, a second flow meter FM2, a second pressure sensor PS2, and a third pressure sensor PS3. Instead, the activated carbon regeneration device 1A includes an inert gas supply pipe 21 in the activated carbon tower 2.

The inert gas supply pipe 21 is connected to the second inert gas supply line L12 and is installed at the end of the stretched portion 21a extending toward the inside of the activated carbon tower 2 and the stretched portion 21a, and the inert gas is filled with the activated carbon. It is provided with an inert gas injection pipe 21b extending in a direction substantially perpendicular to the direction in which the layer flows.

The inert gas injection pipe 21b is located inside the packed bed of activated carbon, and is preferably from the end face of the packed bed of activated carbon located on the opposite side of the inert gas discharge port of the activated carbon tower 2 to the inert gas discharge port. It is located within 10% of the direction.

Further, the inert gas injection pipe 21b may have any shape as long as it extends in a direction substantially perpendicular to the direction in which the activated carbon packed bed flows, for example, a tubular shape, a cross shape, a disk shape, or an arbitrary polygonal shape. It may be plate-shaped.

The inert gas injection pipe 21b has a plurality of holes toward the inert gas discharge port of the activated carbon tower 2, and the inert gas is injected from these holes toward the packed layer of activated carbon. .. Here, "toward the inert gas discharge port of the activated coal tower 2" means only when the plurality of holes formed in the Mactive gas injection pipe 21b open straight toward the Mactive gas discharge port. It does not include opening approximately toward the inert gas outlet. In the present embodiment, the plurality of holes formed in the inert gas injection pipe 21b are opened from the position where the inert gas injection pipe 21b is arranged toward the lower side where the inert gas discharge port is formed. There is.

[2.2 Operation of the embodiment]
In the activated carbon regeneration device 1A, the activated carbon is heated and supplied to the activated carbon tower 2 filled with the activated carbon to which the organic substance is attached, and the heated inert gas is circulated in the activated carbon tower 2 or the activated carbon tower 2 is used. Activated carbon is regenerated by directly heating 2 and circulating an inert gas in the heated activated carbon tower 2 to heat the activated carbon.

In particular, in the activated charcoal regenerating device 1A, the inert gas supplied from the inert gas supply source is heated by the heater 5 and then supplied to the inert gas supply pipe 21 by the second inert gas supply line L12. To. The inert gas supplied to the inert gas supply pipe 21 passes through the stretched portion 21a and then is injected into the inside of the packed layer of activated carbon by the inert gas injection pipe 21b.

[1.3 Heating simulation]
A heating simulation of the activated carbon regeneration device 1A was performed under the following conditions.
That is, it is assumed that 400 L of activated carbon as a filter medium is filled in the activated carbon tower 2 and temperature sensors (thermocouples) TC1 to TC14 are installed at the filled points of the activated carbon as in the activated carbon regeneration device 1 according to the first embodiment. ..

After that, it is assumed that water is replenished to a predetermined height of the activated carbon tower 2 and the water in the activated carbon tower 2 is naturally dropped.

Then, the supply amount of the inert gas (steam) G1 in FIG. 5 is set to 50 kg / h, and the inert gas (steam) G2 is heated to 430 ° C. by the heater 5, and the temperature sensor (thermocouple) TC1 is used. It is assumed that the temperature inside the activated coal tower 2 is measured by TC14. The amount of the inert gas (steam) G4 discharged from the inert gas discharge line L2 to the outside of the system is also 50 kg / h.

FIG. 6 shows the inert gas supply pipe 22 according to the prior art as a comparative example of the activated carbon regeneration device 1A. Unlike the inert gas supply pipe 21, the inert gas supply pipe 22 does not include the inert gas injection pipe 21b extending in a direction substantially perpendicular to the direction in which the activated carbon filling layer flows. Further, the end of the inert gas supply pipe is located in the hollow portion above the packed bed of activated carbon in the activated carbon tower 2. Further, the inert gas is sprayed into the space above the activated carbon filling layer from the holes provided on the side surface of the inert gas supply pipe 22 so as not to concentrate on the local portion of the activated carbon end surface and spray the inert gas.

In the comparative example shown in FIG. 6, the same heating simulation as that of the activated carbon regeneration device 1A was performed.

FIG. 7 shows the result of the heating simulation in the comparative example. Similar to the result of the heating test according to the first embodiment, as the amount of steam used increases, the temperature measured by each temperature sensor is substantially reduced in order from the temperature sensor installed on the upper layer of the activated carbon deposited on the activated carbon tower 2. After rising to 350 ° C, the graph remains flat at approximately 350 ° C. Further, in the graph of FIG. 7, when the amount of steam used reaches about 750 kg, the temperatures of TC13 and TC14, which are the temperature sensors installed in the lowest layer among the temperature sensors installed in the activated carbon tower 2, are measured. , Approximately 350 ° C. That is, the difference from the temperature (430 ° C.) of the inert gas (steam) G2 is 80 ° C., indicating a loss of heat due to heat dissipation.

FIG. 8 shows the result of the heating simulation in the activated carbon regeneration device 1A. In the graph of FIG. 8, when the amount of steam used reaches approximately 610 kg, the temperatures of TC13 and TC14, which are the temperature sensors installed in the lowest layer among the temperature sensors installed in the activated carbon tower 2, are approximately. It reaches 430 ° C.

That is, in the present embodiment, as compared with the comparative example, the amount of steam used for the temperature of the entire activated carbon tower 2 to rise completely is not only smaller than the amount of steam used required in the comparative example, but also the activated carbon tower 2 is used. The temperature reached by 2 is higher than that of the comparative example.

[2.4 Effects of the second embodiment]
In the method for regenerating activated carbon according to the present embodiment, an inert gas is heated and supplied to an activated carbon tower 2 filled with activated carbon adsorbed with an organic substance, and the heated inert gas is circulated in the activated carbon tower 2. A process of heating and regenerating activated carbon In a method for regenerating activated carbon, an inert gas injection portion is located inside an activated carbon filling layer, and an inert gas supply pipe 21 allows the inert gas to be transferred to the activated carbon filling layer. The inert gas supply pipe 21 has a heating step of being directly supplied to the inside, and has an inert gas injection pipe 21b as an injection unit extending in a direction substantially perpendicular to the direction in which the inert gas flows inside the packed layer of activated carbon. Then, the inert gas is injected in the activated carbon injection pipe 21b in the direction of the activated carbon discharge port of the activated carbon tower 2.

By arranging the inert gas supply pipe 21 inside the activated carbon tower 2, the supply flow path of the inert gas has a two-layer structure, and a heat retaining effect can be obtained. In addition to this, by directly supplying the inert gas to the inside of the activated carbon layer, the heat insulating effect of the activated carbon itself can be obtained.
On the other hand, in FIG. 6 according to the prior art, when the high-temperature inert gas is injected into the space above the activated carbon packed bed, the high-temperature inert gas stays in the space having a one-layer structure. The heat dissipation loss to the outside air increases.
Compared with the conventional technique having a large heat dissipation loss, the method for regenerating activated carbon according to the present embodiment can reduce the amount of heat released from the inert gas. That is, since the activated carbon can be efficiently heated by supplying the activated carbon with the maximum amount of heat given to the inert gas, the supply time of the inert gas when regenerating the activated carbon, and eventually the inert gas used It is possible to reduce the amount used. Further, by using the inert gas, even if the activated carbon is heated above the ignition point, the event that the activated carbon burns does not occur. Further, the tip of the inert gas supply pipe 21 has a structure extending in a direction substantially perpendicular to the direction in which the inert gas flows inside the activated carbon filling layer, and the direction in which the inert gas discharge port is located from the inert gas injection pipe 21b. By injecting the inert gas toward the above-mentioned space, it is possible to suppress the flow of the high-temperature inert gas into the space having the above-mentioned one-layer structure and to heat the activated carbon evenly. In addition, the higher the temperature of activated carbon, the higher the desorption efficiency of organic matter.

Further, the inert gas injection pipe 21b is preferably located within 10% from the end face of the packed layer of activated carbon located on the opposite side of the inert gas discharge port of the activated carbon tower 2 toward the inert gas discharge port.

By locating the tip of the inert gas supply pipe 21 on the opposite side of the inert gas discharge port, the entire activated charcoal is heated as compared with the case where it is installed near the inert gas discharge port. The passage of the active gas makes it possible to heat efficiently.
Further, when the inert gas injection pipe 21b is installed outside the activated carbon filling layer, the high-temperature inert gas stays in the external space as described above, the heat dissipation loss becomes large, and the heating becomes inefficient. On the other hand, when the inert gas injection pipe 21b is installed in the deep part of the packed bed, the region of the activated carbon layer through which the heated inert gas does not pass increases, resulting in inefficiency in heating. The inert gas injection pipe 21b is located within 10% from the end face of the activated carbon filling layer located on the opposite side of the activated carbon tower 2 to the inert gas discharge port toward the inert gas discharge port, so that the heating efficiency is inefficient. The conversion is suppressed.

The activated charcoal regenerating device according to the present embodiment is arranged in the activated charcoal tower 2 for accommodating the activated charcoal, the inert gas supply line L1 for supplying the activated gas to the activated charcoal tower 2, and the inert gas supply line L1. The heater 5 that heats the inert gas supplied to 2, the inert gas discharge line L2 that discharges the inert gas from the active coal tower 2, and the inert gas injection portion are located inside the packed layer of the active charcoal. The inert gas supply pipe 21 includes an inert gas supply pipe 21, and the inert gas supply pipe 21 has an inert gas injection pipe 21b as an injection unit extending in a direction substantially perpendicular to the direction in which the inert gas flows inside the packed bed of the activated carbon. , The inert gas is injected in the inert gas injection pipe 21b in the direction of the inert gas discharge port of the active coal tower.

By arranging the inert gas supply pipe 21 inside the activated carbon tower 2, the supply flow path of the inert gas has a two-layer structure, and a heat retaining effect can be obtained. In addition to this, by directly supplying the inert gas to the inside of the activated carbon layer, the heat insulating effect of the activated carbon itself can be obtained, and since the inert gas is supplied from the upper or lower part of the activated carbon tower 2, the space in the upper part or the lower part is obtained. It is possible to reduce the amount of heat radiated from the inert gas as compared with the case where the high temperature inert gas stays in the slab and the heat dissipation loss is large. In addition, by supplying the maximum amount of heat given to the inert gas to the activated carbon, the activated carbon can be heated efficiently, so that the supply time of the inert gas when regenerating the activated carbon, and eventually the inert gas used It is possible to reduce the amount used. Further, by using the inert gas, even if the activated carbon is heated above the ignition point, the event that the activated carbon burns does not occur. Further, the tip of the inert gas supply pipe 21 has a structure extending in a direction substantially perpendicular to the direction in which the inert gas flows inside the activated carbon filling layer, and from the inert gas injection pipe 21b, approximately the inert gas discharge port. By injecting an inert gas in a certain direction, the activated charcoal can be heated evenly.

[3 Modification example]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. Moreover, the effects described in the present embodiment are merely a list of the most preferable effects resulting from the present invention, and the effects according to the present invention are not limited to those described in the present embodiment.

For example, in the first embodiment described above, the activated carbon regeneration device 1 has a configuration including an ejector 3 and a circulation line L3. On the other hand, in the above-mentioned second embodiment, the activated carbon regeneration device 1A has a configuration in which the inert gas supply pipe 21 is provided inside the activated carbon tower 2. As a modification, the configuration may include both of these, that is, the ejector 3, the circulation line L3, and the inert gas supply pipe 21. Further, the direction in which the inert gas flows in the activated carbon tower is also shown to flow downward from the upper part of the activated carbon tower in FIGS. 1 and 5, but it may be from the lower part to the upper direction, or may be lateral or diagonal. Further, although only the configuration related to the regeneration of activated carbon is shown in FIGS. 1 and 5, the activated carbon tower 2 may be a dedicated device for regeneration treatment of activated carbon, and a water flow line, a treated water line, a backwash line, and various water qualities. By providing a monitoring sensor or the like, the device may be capable of performing both water purification treatment and activated carbon regeneration treatment by the adsorption action of activated carbon.

1, 1A Activated charcoal regeneration device 2 Activated coal tower 3 Ejector 4 Pressure control valve 5 Heater 6 On-off valve 7 Check valve 8 Gas-liquid separation device L1 Inert gas supply line L2 Inert gas discharge line L3 Circulation line L4 Condensate discharge line L11 1st inert gas supply line L12 2nd inert gas supply line FM1 1st flow meter FM2 2nd flow meter

Claims (10)

An inert gas is heated and supplied to an activated carbon column filled with activated carbon adsorbed with an organic substance, and the heated inert gas is circulated in the activated carbon column, or the activated carbon column is directly heated and the operation is performed. A method for regenerating activated carbon by circulating the inert gas in the heated activated carbon tower to heat and regenerate the activated carbon.
An ejector using the inert gas supplied from the inert gas supply source as a driving fluid sucks at least a part of the inert gas discharged from the activated carbon tower, circulates it in the activated carbon tower, and heats the activated carbon. Has a step of performing a process of reuse in
How to regenerate activated carbon. In the step of heating and regenerating the activated carbon, the inert gas sucked into the ejector is separated as the gas by performing a gas-liquid separation operation for separating the gas and the liquid before being sucked into the ejector. Only the inert gas is sucked into the ejector, circulated in the activated carbon tower, and reused for heating the activated carbon.
The method for regenerating activated carbon according to claim 1. After the treatment of sucking and circulating at least a part of the inert gas discharged from the activated carbon tower and reusing it for heating the activated carbon.
The process of stopping the circulation of the inert gas by the ejector and supplying only the inert gas supplied from the inert gas supply source to the activated carbon tower is executed.
The method for regenerating activated carbon according to claim 1 or 2. The activated carbon is heated and supplied to an activated carbon tower filled with activated carbon adsorbed with organic substances, and the heated inert gas is circulated in the activated carbon tower to heat the activated carbon and regenerate the activated carbon. It ’s a method,
It has a heating step in which the inert gas is directly supplied to the inside of the packed layer of the activated carbon by the inert gas supply pipe in which the injection portion of the inert gas is located inside the packed layer of the activated carbon.
The inert gas supply pipe has, as the injection portion, an inert gas injection pipe extending in a direction substantially perpendicular to the direction in which the inert gas flows inside the packed bed of the activated charcoal, and the inert gas is the inert gas. A method for regenerating activated carbon that is injected in a direction of an inert gas discharge port of the activated coal tower in a gas injection pipe. According to claim 4, the inert gas injection pipe is located within 10% from the end face of the packed layer of the activated carbon located on the side opposite to the inert gas discharge port of the activated carbon tower toward the inert gas discharge port. The method for regenerating activated carbon according to the description. An inert gas is heated and supplied to an activated carbon column filled with activated carbon adsorbed with an organic substance, and the heated inert gas is circulated in the activated carbon column, or the activated carbon column is directly heated and the operation is performed. A method for regenerating activated carbon by circulating the inert gas in the heated activated carbon tower to heat and regenerate the activated carbon.
An ejector using the inert gas supplied from the inert gas supply source as a driving fluid sucks at least a part of the inert gas discharged from the activated carbon tower, circulates it in the activated carbon tower, and heats the activated carbon. While reusing it
It has a heating step in which the inert gas is directly supplied to the inside of the packed layer of the activated carbon by the inert gas supply pipe in which the injection portion of the inert gas is located inside the packed layer of the activated carbon.
The inert gas supply pipe has, as the injection portion, an inert gas injection pipe extending in a direction substantially perpendicular to the direction in which the inert gas flows inside the packed bed of the activated charcoal, and the inert gas is the inert gas. A method for regenerating activated carbon that is injected in a direction of an inert gas discharge port of the activated coal tower in a gas injection pipe. The regeneration method according to any one of claims 1 to 6, wherein the inert gas is water vapor. The regeneration method according to claim 7, wherein in the heating step, the inert gas is heated so that the temperature of the inert gas supplied to the activated carbon is 100 ° C. or higher and 600 ° C. or lower. An activated carbon tower that houses activated carbon,
A supply line that supplies the inert gas to the activated carbon tower,
A heating means arranged in the supply line and heating the inert gas supplied to the activated carbon tower, or a heating means for directly heating the activated carbon tower.
A discharge line that discharges the inert gas from the activated carbon tower,
A circulation line that circulates at least a part of the inert gas discharged from the discharge line to the supply line.
An inert gas supplied from the inert gas supply source is used as a driving fluid, and an ejector that sucks at least a part of the inert gas discharged from the activated carbon tower and circulates in the activated carbon tower is provided. Activated carbon regeneration device. An activated carbon tower that houses activated carbon,
A supply line that supplies the inert gas to the activated carbon tower,
A heating means arranged in the supply line and heating the inert gas supplied to the activated carbon tower,
A discharge line that discharges the inert gas from the activated carbon tower,
The inert gas supply pipe is provided, wherein the injection portion of the inert gas is located inside the packed bed of the activated carbon.
The inert gas supply pipe has, as the injection portion, an inert gas injection pipe extending in a direction substantially perpendicular to the direction in which the inert gas flows inside the packed bed of the activated charcoal, and the inert gas is the inert gas. A regenerating device for activated charcoal, which is injected in a gas injection pipe in a direction of an inert gas discharge port of the activated charcoal tower.

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