JP4963573B2 - Activated carbon production apparatus and activated carbon production method - Google Patents

Description

  The present invention relates to an activated carbon production apparatus, and relates to an energy efficient activated carbon production apparatus and an activated carbon production method capable of producing various activated carbons having different performances from various thinly distributed biomass as raw materials.

  The adsorption performance of activated carbon greatly depends on the specific surface area and pore volume of activated carbon. The specific surface area and pore volume change with the progress of the activation reaction. In order to produce activated carbon having a high specific surface area or a high pore volume, methods such as increasing the activation temperature, increasing the activation gas concentration, or increasing the activation time are employed. Since correspondence with temperature and concentration is limited in terms of apparatus or physical properties, correspondence with time is common. In the industrial production of activated carbon with high adsorption performance, a method of activating for a long time with a large-scale continuous activation apparatus is employed. For this reason, there is no choice but to produce small varieties and large quantities.

The production of activated carbon from biomass is divided into a carbonization step and an activation step for activating the carbide. In general, carbonization is performed in a biomass generation site, and product activation is accumulated and the activation process is performed collectively.
As a method of simultaneously processing the carbonization step and the activation step, the activated carbon manufacturing apparatus that performs carbonization and activation in a continuous manner shown in Patent Documents 1 to 4, and the carbonization and activation in a discontinuous type (batch type) shown in Patent Literature 5 are performed. An activated carbon production apparatus has been proposed.
Japanese Patent Laid-Open No. 2000-154012 JP 2004-034003 A JP 2001-220120 A Japanese Patent No. 3322338 Japanese Patent Laying-Open No. 2005-069772

  However, in order to produce a high-grade activated carbon by the conventional continuous activation methods shown in Patent Documents 1 to 4, a very large-scale activation device is required in order to obtain a long-time activation reaction. In such large-scale equipment, it is necessary to change the activation conditions for producing activated carbon with different performance after all the raw materials and products in the equipment including the carbonization process have been taken out, so there is a loss in terms of production and energy. There is a problem that there are many. For this reason, it was not suitable for multi-product production.

  Patent Documents 1 and 2 are continuous production apparatuses that perform carbonization and activation in the same kiln, and Patent Documents 3 and 4 are continuous production apparatuses in which a continuous carbonization apparatus and a continuous activation apparatus are connected. is there. In either apparatus, the operating range of activation reaction time is narrow, and the types of product activated carbon cannot be increased. Furthermore, since Patent Document 1 cannot adjust the activation gas concentration, there is a problem that the activated carbon quality varies, and Patent Document 4 has a problem that the combustible gas generated in the carbonization and activation process is not effectively used. .

  On the other hand, Patent Document 5 is a discontinuous system in which the carbonization step is performed in the same heat treatment furnace, and then the activation step is performed. Since the total time of the carbonization time and the activation time is one batch of processing time, productivity is increased. Is not good. In addition, there is a problem that the dry distillation gas, which is a combustible gas generated in the carbonization process, cannot be effectively used, which is disadvantageous in terms of energy.

  In addition, a method in which the carbonization step is performed separately and only the activation step is performed in a batch-type activation furnace is suitable for small-quantity multi-product production, but it is not preferable because the combustible gas generated in the carbonization step cannot be effectively used. In a batch type activation furnace, after the activation of the carbide is finished, the product activated carbon is often taken out after cooling the temperature of the activation furnace itself. In such a method, productivity deteriorates due to the cooling time of the furnace, the reheating temperature during the next processing, and the like, and energy loss due to the rising and falling temperature occurs. The batch-type activation furnace is easy to change conditions for each batch and is advantageous for multi-product processing, but has a problem in terms of thermal efficiency and production efficiency.

  Furthermore, thinned wood, bamboo, waste wood, and other biomass that are widely distributed in Japan are all raw materials for activated carbon, but production efficiency is very poor with current activated carbon production systems and devices. For this reason, activated carbon production using unused biomass is not popular in Japan. More than 100,000 tons of activated carbon is used in Japan every year, but most are imported. An energy-efficient small-scale activated carbon production apparatus capable of producing various activated carbons having different performances from various types of biomass widely distributed in Japan is desired.

  Accordingly, an object of the present invention is to provide an activated carbon production apparatus capable of producing a wide variety of activated carbons that can be used in a wide variety of raw materials, which are widely distributed thinly, with energy efficiency and production efficiency.

In order to solve the above problems, the activated carbon manufacturing apparatus according to claim 1, as shown in FIG. 1, a continuous carbonization furnace to carbonize the raw material continuous to yield volumes of carbide discharged from the continuous carbonization furnace carbides yield container, a first connecting portion connecting the carbide container and the continuous carbonization furnace, a non-continuous activation furnace for activated carbides non-continuous, the said carbide yield container discontinuous activation furnace with connecting the door, characterized in that and a second connecting portion having a means for transporting the carbides that yield capacity in the carbide container to the non-continuous activation furnace.
Activated carbon production apparatus according to claim 1 is connected and a continuous carbonizing oven carbides yield container discontinuous activation furnace while continuously producing carbides, temporarily carbide yield container of the carbide It is characterized in that it is stored and activated by supplying the carbide to a discontinuous activation furnace in which the activation conditions can be changed for each batch.

Before SL discontinuous activation furnace, without cooling the non-continuous activation furnace it is preferably provided with a discharge means for discharging the activated product.

The activated carbon production apparatus according to claim 1 , wherein a dry distillation gas quantitatively generated from the continuous carbonization furnace and an activated product gas generated from the activation furnace are used as main fuels, and the dry distillation gas and the activated product gas are simultaneously burned. comprising a hot air generator furnace that generates hot air by the hot air generated in the heat air generating furnace, characterized in that the heat source for the carbonization furnace及beauty vehicle active furnace. Although FIG. 1 shows an example in which hot air is supplied in series to a continuous carbonization furnace and a discontinuous activation furnace, parallel supply may be used .

Activated carbon manufacturing method according to claim 2, transferred and continuously carbonizing step of carbonizing the raw material continuous, carbides yield capacity step of yield volumes of carbide produced in the continuous carbonizing step, the stowed carbide And a discontinuous activation step for activating in a discontinuous manner.

The discontinuous activation step, without cooling the non-continuous activated furnace is preferably provided with a discharge step of discharging the activation thereof.

The activated carbon production method according to claim 1 , wherein the dry distillation gas generated in the continuous carbonization step and the activated product gas generated in the discontinuous activation step are main fuels, and the dry distillation gas and the activated product gas are burned simultaneously. a hot air generator step of generating hot air by the hot air generated in the heat air generating step, the hot air supply step of supplying as a heat source in the continuous carbonizing step及beauty before Symbol discontinuous activation step, further comprising a Features.

According to the present invention, while continuously producing a carbide is activated carbon raw material, and temporarily storing this carbide continuous carbonizing oven and discontinuous activation furnace indirectly linked to that carbides yield container and the since the carbides of a carbide yield container supplies discontinuous activation furnace capable conditions changed for each batch activation processing, can be produced in a single device activated carbon continuously carbonized processed while various kinds.

Also, if you want to change the activation conditions for the purpose of producing a different activated carbon in performance, while carbonization step continues to transport the carbides continue to work in a continuous carbide yield container, since activation process is not continuous mode, each batch It is possible to change the activation time, activation temperature, activated oxidizing gas species, and the like. When changing the activation time by changing the feeding rate of the carbonizing furnace, without exceeding the capacity of the carbide yield container, also it is possible to continue the processing without carbides is insufficient. When it is necessary to produce activated carbon having a different quality, it is only necessary to set the activation conditions required before starting the activation process and start the processing, so switching is easy.

The discontinuous activation furnace, without cooling the non-continuous activation furnace, when provided with a discharge means for discharging the activated product is charcoal step continues to transport the carbides continue to work in a continuous carbide yield container while, activation thereof at the time when the activation process is completed without cooling the non-continuous activation furnace, is discharged from the non-continuous activation furnace, also, since supplying new carbide from said carbide yield container to activation furnace, Although it is a non-continuous activation method, there is no need to lower or raise the temperature between the end of the activation process and the start of the activation process. Therefore, since the activation process of the next batch can be started without spending time and energy for temperature increase / decrease, the energy loss is small and high productivity can be maintained even though it is a discontinuous activation furnace. Therefore, activation processing is possible under various conditions without impairing the productivity of the continuous carbonization furnace, and the production of various types of activated carbon can be realized.

According to the invention of claim 1 , since it is a continuous carbonization furnace, the dry distillation gas generated almost quantitatively and the activation product gas generated from the batch activation furnace are used as the main fuel of the hot air generation furnace, and the generated hot air is used. Since it can be used as a heat source for a carbonization furnace and an activation furnace, and as a preheating heat source for an activation gas used for activation, an activated carbon production apparatus with excellent energy efficiency is obtained.

According to claim 2, the same effect as the effect of the first aspect that describes before.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 2, the activated carbon production apparatus 1 according to the embodiment includes a hopper 2a for continuously feeding raw materials, a screw feeder 2b for continuously transferring the raw materials continuously discharged from the hopper 2a, and a screw. continuous carbonization furnace 3 to receive the raw material coming continuously transferred from is connected to the feeder 2b screw feeder 2b, the carbides container 4 to yield volumes of carbide discharged from the continuous carbonization furnace 3, the continuous carbonization furnace 3 and carbide While connecting the 1st connection part 5 provided with the rear foot and the damper 5a of the carbonization furnace which connects the container 4, the discontinuous activation furnace 6 which activates carbide, the carbide container 4 and the discontinuous activation furnace 6 are connected. And a second connecting portion 7 including a screw feeder 7a for transferring the carbide stored in the carbide storage container 4 to the discontinuous activation furnace 6. Moreover, the discontinuous activation furnace 6 is equipped with the discharge means which can discharge | emit an activation thing, without cooling the temperature of a furnace. This discharge means includes a configuration in which discharge guide vanes are provided on the inner wall of the activation furnace main body 62, a configuration in which a discharge screw is provided at the exit portion of the activation furnace main body 62, or a configuration in which the activation furnace main body 62 is inclined. In this embodiment, the discharge guide vanes 8 as discharge means are provided on the inner wall of the rear portion (exit) of the activation furnace main body 62. Further, hot air is used as a heat source for the continuous carbonization furnace 3 and the discontinuous activation furnace 6 by generating hot air using the dry distillation gas generated from the continuous carbonization furnace 3 and the activation product gas generated from the discontinuous activation furnace 6 as the main fuel. And a generating furnace 9. Details will be described below.

The continuous carbonization furnace 3 includes a carbonization furnace main body 30 having a cylindrical body whose carbonization is performed on a workpiece to be processed and whose axial direction is set in a horizontal direction (for example, a horizontal direction), and the outside of the carbonization furnace main body 30. A carbonization furnace that is coaxially formed in the region, covers most of the length of the cylinder body of the carbonization furnace body 30, has a larger diameter than the cylinder body of the carbonization furnace body 30, and heats the carbonization furnace body 30 with hot air A heating chamber 31 and an exhaust pipe 32 for discharging hot air inside the carbonization furnace heating chamber 31 to the outside are provided. The carbonization furnace main body 30 is set to rotate by a carbonization furnace rotating means 33 constituted by a motor, a gear, and a chain. The inner wall of the carbonization furnace main body 30 is provided with a stirring blade (not shown), and the raw material is set to be heated uniformly by being stirred. The raw material is set to move from the inlet of the carbonization furnace main body 30 toward the rear of the carbonization furnace main body 30 every time the raw material is stirred by the inclination of the stirring blade (not shown). A stirring blade (not shown) is disposed on the entire inner wall from the inlet to the outlet of the carbonization furnace main body 30. By adjusting the rotation speed of the carbonization furnace main body 30 by the carbonization furnace rotating means 33, the residence time of the workpiece in the carbonization furnace can be set. The manufactured carbide is set to be stored in the carbide container 4 through the first connecting portion 5. The processes in the continuous carbonization furnace 3 are performed continuously. The carbonization furnace heating chamber 31 forms a concentrically covering the outside of the carbonization furnace main body 30 that is a cylindrical pipe. It is set so that the carbonization furnace main body 30 is heated and kept warm while hot air passes through the space. The outer wall of the cylindrical body of the carbonization furnace main body 30 and the end of the cylindrical body of the heating chamber 31 are sealed to prevent leakage of hot air from here. The carbide raw material is set so that the inside of the carbonization furnace main body 30 is sequentially moved to the rear of the carbonization furnace main body 30 by the rotation of the carbonization furnace rotating means 33 and the stirring blade (not shown). While moving from the front part of the carbonization furnace main body 30 to the rear part, the raw material of the carbide is steamed and becomes carbide. Continuous carbonization furnace 3 and the carbide yield container 4 is usually made in a vertical relationship, it means for transferring the carbides discharged from the continuous carbonization furnace 3 to carbide container 4 is not dare necessary, may naturally fall. However, there is no problem even if a moving means such as a rotary blade is provided if necessary.

The non-continuous activation furnace 6 is a part that activates carbides, an activation furnace front foot 60, and an activation furnace heating chamber 61 having a cylindrical body whose axial direction is set in the horizontal direction (for example, the horizontal direction), A cylindrical body formed coaxially in the inner region of the activation furnace heating chamber 61, most of the length direction is covered with the activation furnace heating chamber 61, and a cylinder having a smaller diameter than the cylinder of the activation furnace heating chamber 61. An activation furnace body 62 that has a body and is heated by hot air in the activation furnace heating chamber 61 and an activation furnace rear foot 63 are provided. The activation furnace main body 62 is rotated by an activation furnace rotating means 64 composed of a motor, a gear, and a chain. Carbides, which are yield capacity carbides container 4 is supplied to the activated furnace body 62 by the second coupling part 7. The amount of carbide supplied to the activation furnace body 62 can be set by the rotation speed and rotation time of the screw feeder 7a. When the set amount of carbide is supplied to the activation furnace main body 62, the rotation of the screw feeder 7a is stopped. The inner wall of the activation furnace main body 62 is provided with stirring blades (not shown), and the carbide is stirred by the stirring blades (not shown) so that the activation is performed uniformly. The agitating blade (not shown) is provided in a portion where carbide is present in the activation furnace main body 62, and the stirring blade (not shown) of the guide vane 8 serving as an outlet discharge means is provided on the entire inner wall of the activation furnace main body 62. Equipped up to now. During processing, the processed material is set so as to receive a force pushed toward the entrance of the activation furnace main body 62 and move slightly to the entrance. On the other hand, at the time of discharge, the rotation of the activation furnace main body 62 is opposite to that during the processing, so the angle of the stirring blade (not shown) is the angle at which the processed material inside the activation furnace main body 62 is transferred from the inlet to the outlet. It is set to have. The guide vanes 8 are arranged on the outlet side of the stirring vanes (not shown). In the rotational direction of the activation furnace main body 62 during the processing, the guide blade 8 is set to an angle at which the processed material is pushed back inward. Similar to the heating chamber 31 of the carbonization furnace 3, the activation furnace heating chamber 61 forms a concentric space outside the activation furnace body 62, and the hot air passes through the space. The space between the outer wall of the cylindrical body of the activation furnace main body 62 and the end of the cylindrical body of the activation furnace heating chamber 61 is sealed to prevent leakage of hot air from here.

  At the end of the activation processing time, the activation material is set to be discharged from the activation furnace body 62 by the guide vanes 8 by reversing the rotation direction of the activation furnace body 62 without cooling the activation furnace body 62. . The cooling device 10 is connected to the activation furnace rear foot 63, and the discharged activated material is cooled. The activation gas injection pipe 11 is piped into the activation furnace main body 62 via the activation furnace rear foot 63. Thereby, a set amount of activation gas is quantitatively sent to the activation furnace main body 62 via the activation gas injection pipe 11. As the activation gas, water vapor, carbon dioxide, oxygen, air, or a mixed gas of two or more thereof can be used.

  The first connecting part 5 and the hot air generating furnace 9 are connected via a dry distillation gas transfer pipe 12, and the dry distillation gas generated in the carbonization furnace main body 30 passes through the first connecting part 5 and the dry distillation gas transfer pipe 12. Is set to be sent to the hot air generating furnace 9. The activation furnace front foot 60 and the hot air generation furnace 9 are connected via the activation product gas transfer pipe 13, and the product gas containing carbon monoxide and hydrogen gas generated by the activation reaction is connected to the activation product gas transfer pipe 13. It is set to be sent to the hot-air generating furnace 9 via.

  The hot air generating furnace 9 completely burns the supplied dry distillation gas and activated product gas, and the gas temperature in the hot air generating furnace 9 is the air injected from the auxiliary burner 92 and the combustion air injection pipe 93. Adjusted by quantity. The hot air generating furnace 9 and the activation furnace heating chamber 61 are connected via the hot air piping 14, and the hot air generated in the hot air generating furnace 9 is sent to the activation furnace heating chamber 61 via the hot air piping 14, and the activation furnace main body. The temperature 62 is maintained at a predetermined temperature. The activation furnace heating chamber 61 and the carbonization furnace heating chamber 31 are connected via the hot air connecting pipe 15, and the hot air moves from the activation furnace heating chamber 61 to the carbonization furnace heating chamber 31 to keep the carbonization furnace main body 30 at a predetermined temperature. Is set to That is, the dry distillation gas and the activation gas are simultaneously combusted inside the hot air generation furnace 9, and the generated hot air is transmitted from one hot air pipe 14 through the activation furnace heating chamber 61, the hot air connection pipe 15, the carbonization furnace heating chamber 31, and the exhaust pipe 32. It is connected in series to the hot air outlet. The raw material, carbide, activated material, and the like have a structure that does not come into direct contact with the hot air supplied from the hot air generator 9.

  Next, the activated carbon manufacturing method by the activated carbon manufacturing apparatus 1 of embodiment of this invention is demonstrated. The workpieces carried into the hopper 2a are continuously supplied to the carbonization furnace main body 30 by the hopper 2a. The carbonization furnace main body 30 is heated by the carbonization furnace heating chamber 31, and the temperature at the rear part of the carbonization furnace main body is adjusted to an arbitrary temperature of 500 to 1,200 ° C, preferably 700 to 900 ° C. The residence time of the raw material inside the carbonization furnace main body 30 is controlled by the rotation speed of the carbonization furnace rotating means 33 and is operated with a residence time of 20 to 600 minutes, preferably 30 to 120 minutes. The carbide produced in the carbonization furnace main body 30 is stored in the carbide container 4 through the first connecting portion 5. The steps so far are performed continuously.

Carbides, which are yield capacity carbides container 4 by screw feeder 7a which is mounted on the second connecting part 7, is supplied to the activated furnace body 62. When the set amount of carbide is supplied to the activation furnace main body 62, the rotation of the screw feeder 7a is stopped. The activation furnace body 62 is heated by the activation furnace heating chamber 61, and the temperature inside the activation furnace body 62 is adjusted to an arbitrary temperature of 600 to 1,500 ° C., desirably 800 to 1,000 ° C. One or more kinds of activation gases such as water vapor, carbon dioxide, air, and oxygen are supplied to the activation furnace main body 62 through the activation gas injection pipe 11, and the activation reaction starts. In order to perform uniform activation on the supplied carbide, the activation furnace main body 62 is rotated by the activation furnace rotating means 64, and stirring blades (not shown) provided on the inner wall of the activation furnace main body stir the carbide. The activation time is 20 to 2400 minutes, preferably 40 to 600 minutes. The adsorption performance of the product activated carbon can be adjusted by the type of the activation gas, the supply amount of the activation gas, the temperature inside the activation furnace main body 62, the activation time, and the like. In the activation furnace main body 62, the processed material is subjected to a force pushed toward the inlet by the stirring blade (not shown) and the guide blade 8 during the processing, and slightly moves to the inlet. The inclination of the object is corrected by the natural force trying to level. The height of the stirring blade (not shown) is not so high, the amount of the processed material is sufficiently large, and the stirring blade (not shown) is filled with the processed material.

  When the activation setting time in the non-continuous activation furnace 6 is completed, the processed material is discharged. At this time, since the rotation direction of the activation furnace main body 62 is reversed, the stirring blade (not shown) moves the processed material to the position of the guide blade 8 and the guide blade 8 serving as a discharge means for the activated material supplies the processed material. Extruded to the outlet side, the activated material is transferred to the cooling device 10 via the activation furnace rear foot 63 by the guide vanes 8. In this embodiment, guide vanes are used, but any method may be used. After the activation material is discharged from the activation furnace main body 62, new carbide is supplied from the carbide container 4 to the activation furnace main body 62. If you want to change the activation conditions, change them at this point.

  The dry distillation gas generated in the carbonization furnace main body 30 is sent to the hot air generation furnace 9 via the dry distillation gas transfer pipe 12. A product gas containing carbon monoxide and hydrogen gas generated by an activation reaction when steam is used as the activation gas is sent from the activation furnace main body 62 to the hot air generation furnace 9 through the activation product gas transfer pipe 13.

  The dry distillation gas and the activation generating gas are completely burned in the hot air generating furnace 9, adjusted in temperature by the amount of air injected from the auxiliary burner 92 or the combustion air injection pipe 93, etc., and then passed through the hot air piping 14. Is sent to the activation furnace heating chamber 61 to keep the temperature of the activation furnace body 62 at a predetermined temperature. Next, the hot air is sent from the activation furnace heating chamber 61 to the carbonization furnace heating chamber 31 through the hot air connection pipe 15 to keep the carbonization furnace main body 30 at a predetermined temperature. Thereafter, the hot air is discharged from the exhaust pipe 32.

  As described above, according to the embodiment described above, the carbide is temporarily stored in the carbide container 4 in which the continuous carbonization furnace 3 and the discontinuous activation furnace 6 are indirectly connected while continuously producing the carbide as the activated carbon raw material. In order to perform activation processing by supplying carbide from the carbide container 4 to the discontinuous activation furnace 6 capable of changing the conditions for each batch, it is possible to manufacture a variety of activated carbons with a single device while continuously carbonizing. it can.

  While the continuous carbonization furnace 3 continues processing and continues to transfer the carbide to the carbide container 4, the activated material is not cooled in the discontinuous activation furnace 6 when the activation process is completed in the discontinuous activation furnace 6. , Supplying new carbide from the carbide container 4 to the discontinuous activation furnace 6, and starting the activation process of the next batch in the discontinuous activation furnace 6 without spending time in raising the temperature of the discontinuous activation furnace 6 Therefore, although it is a discontinuous activation furnace, the energy loss is small, the productivity is high, and the activation process capable of following the continuous carbonization furnace 3 becomes possible.

  When it is desired to change the activation conditions of the discontinuous activation furnace 6 for the purpose of producing activated carbon having different performances, the continuous carbonization furnace 3 continuously processes and continues to transfer the carbide to the carbide container 4, but the discontinuous activation furnace. Since 6 is not a continuous system, it is possible to change the activation time, activation temperature, activated oxidizing gas species, and the like for each batch. When it is necessary to manufacture activated carbon of different quality, it is only necessary to set the required activation conditions and start the processing before starting the activation process in the discontinuous activation furnace 6, so the conditions can be easily set. . When changing the activation time, it is possible to continue the processing without exceeding the capacity of the carbide container 4 and lacking the carbide by changing the feed rate of the raw material to the continuous carbonization furnace 3. .

  In addition, although it is a discontinuous activation method, it is not necessary to lower the temperature and increase the temperature during the activation process from the end of the activation process, so there is no energy loss and without inhibiting the productivity of the continuous carbonization furnace 3, Activation processing is possible under various conditions, and it is possible to produce various types of activated carbon.

  An almost constant amount of dry distillation gas generated from the continuous carbonization furnace 3 and the activation product gas generated from the discontinuous activation furnace 6 are sent to the hot air generation furnace 9 and used as main fuel for generating hot air. The generated hot air is used as a heat source for the activation furnace 6 and the carbonization furnace 3. Further, it can be used as a preheating heat source for the activation gas. According to the activated carbon production apparatus according to the present invention, depending on the scale of the apparatus, part or all of the thermal energy necessary for the production of activated carbon is obtained by burning dry distillation gas and activation product gas generated from the production process. Can do.

  Next, examples of the present invention will be described. In the following examples, an externally heated rotary kiln was used as the continuous carbonization furnace 3 and the discontinuous activation furnace 6. Carbide was produced under the following conditions using commercially available wood pellets (manufactured by Tsutsui Corporation) as raw materials. Raw materials were continuously charged into an external heating rotary kiln whose internal temperature at the rear was set to 850 ° C., and the internal residence time was maintained for 60 minutes to obtain a carbide. The yield of this carbide based on the raw dry weight was 28.9%. This carbide was used in all the following examples.

  An external heating rotary kiln with an effective internal capacity of 32 Liters is charged with 9.6 Liters (weight 4,550 g) of carbide equivalent to 30% of the effective internal capacity of the kiln, the internal temperature is maintained at 850 ° C., and the rotational speed is 2 revolutions / minute. The activated product was obtained by continuously injecting 12 g of steam per minute for 21 hours. The methylene blue adsorption amount of the activated material according to the activated carbon test method JIS K1474 (hereinafter referred to as methylene blue adsorption amount) was 220 ml / g.

  An activated material was obtained under the same conditions as in Example 1 except that the charged carbide was 4.8 Liters (weight 2,275 g), which was 15% of the effective content of the kiln, and that the holding time was 13 hours. The methylene blue adsorption amount of this activation product was 220 ml / g.

  An activated material was obtained under the same conditions as in Example 1 except that the input carbide was 0.96 Liter (weight 455 g) which was 3% of the effective content of the kiln and that the holding time was 4 hours. The methylene blue adsorption amount of this activation product was 220 ml / g.

  An activated material was obtained by changing the steam supply amount to 6 g / min and holding time to 17 hours under the same conditions as in Example 2. The methylene blue adsorption amount of this activation product was 220 ml / g.

  An activated material was obtained under the same conditions as in Example 4 except that the input carbide was 0.64 Liter (weight: 303 g), which is 2% of the effective content of the kiln, and that the holding time was 4 hours. The methylene blue adsorption amount of this activation product was 220 ml / g.

  Under the same conditions as in Example 2, the retention time was changed to 8 hours to obtain an activation product. The methylene blue adsorption amount of this activation product was 150 ml / g.

  Under the same conditions as in Example 2, the retention time was changed to 3 hours to obtain an activation product. The methylene blue adsorption amount of this activation product was 70 ml / g.

  As is clear from Examples 1, 2, and 3, even if the amount of workpieces in the kiln is different, the adsorption performance of the activated carbon product can be made equal by adjusting the activation time. Thus, products with the same performance can be processed in batches as needed.

  As is apparent from Examples 4 and 5, the adsorption performance of the activated carbon product can be improved by adjusting the activation time under the condition of the supply steam amount different from that in Example 1 and the amount of the object to be processed in the kiln is different. Can be equivalent.

  As is clear from Examples 2, 6, and 7, if the amount of workpieces in the kiln is constant, activated carbon having different performance can be produced by adjusting the activation time.

  As described above, according to the apparatus of the present invention, the carbide generated while continuously processing the carbonization step is once held in the carbide container, and then only the necessary amount is transferred to the discontinuous activation furnace to meet the required adsorption performance. Can be processed under different activation conditions.

  The present invention is not limited to the above-described embodiment, and modifications and the like can be made without departing from the technical idea of the present invention. It is included in the technical scope of the invention. For example, hot air is supplied in series from the activation furnace heating chamber 61 to the carbonization furnace heating chamber 31, but hot air from the hot air generator 9 is supplied in parallel to the activation furnace heating chamber 61 and the carbonization furnace heating chamber 31. May be.

It is a block diagram which shows the structure of this invention. It is a block diagram of activated carbon manufacturing apparatus 1 of an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Activated carbon manufacturing apparatus 2a ... Hopper 2b ... Screw feeder 3 ... Continuous carbonization furnace 4 ... Carbide container 5 ... 1st connection part 5a ... Damper 6 ... Discontinuous activation furnace 7 ... 2nd connection part 7a ... Screw feeder 8 ... Guide Blade 9 ... Hot-air generating furnace 10 ... Cooling device 11 ... Activated gas injection pipe 12 ... Dry distillation gas transfer pipe 13 ... Activated product gas transfer pipe 14 ... Hot-air pipe 15 ... Hot-air connection pipe 30 ... Carbonization furnace body 31 ... Carbonization furnace heating chamber 32 ... exhaust pipe 33 ... carbonization furnace rotating means 60 ... activation furnace front foot 61 ... activation furnace heating chamber 62 ... activation furnace body 63 ... activation furnace rear foot 64 ... activation furnace rotating means 92 ... auxiliary burner 93 ... air inlet

Claims (2)

A continuous carbonization furnace that continuously carbonizes the raw material;
Carbides yield container of the carbide to yield volume discharged from the continuous carbonization furnace,
A first connecting portion that connects the continuous carbonization furnace and the carbide container;
A discontinuous activation furnace that activates carbide in a discontinuous manner;
As well as connecting the discontinuous activation furnace and the carbide yield container, a second connecting part comprising means for transferring the carbides that yield capacity in the carbide container to the non-continuous activation furnace,
With
A hot air generator that generates hot air by burning the dry distillation gas and the activation product gas simultaneously, using as a main fuel the dry distillation gas that is quantitatively generated from the continuous carbonization furnace and the activation product gas that is generated from the discontinuous activation furnace Comprising
An activated carbon production apparatus characterized in that hot air generated in the hot air generator is used as a heat source for the continuous carbonization furnace and the discontinuous activation furnace . A continuous carbonization step for continuously carbonizing the raw material;
A carbide containing step for containing the carbide produced in the continuous carbonization step;
A non-continuous activation step for transferring the contained carbide and activating in a discontinuous manner;
Hot air generating step for generating hot air by simultaneously burning the dry distillation gas and the activation product gas at the same time using the dry distillation gas quantitatively generated in the continuous carbonization step and the activation product gas generated in the discontinuous activation step as a main fuel. When,
A hot air supply step for supplying hot air generated in the hot air generation step as a heat source in the continuous carbonization step and the discontinuous activation step;
The activated carbon manufacturing method characterized by comprising .

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