JP2004352538A - Method and device for producing active carbide - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing active carbide which can attain the improvement in the quality of active carbide, and also, can correspond to the increase in the temperature of a device, and to provide the device. <P>SOLUTION: In the device for producing active carbide where drying, carbonization and activation are performed at the inside of a screw conveyer, a cylindrical casing in the downstream part of the flow of an object to be treated in an activation zone 38 at the rear side is covered with refractories, the covering refractories 40 and the cylindrical casing are provided with a dry distillation gas exhaust port 42, the circumference of the exhaust port is partitioned by a shielding wall 44 so as to be a hot blast generation part 46, and a burner 48 is connected to the hot blast generation part. Thus, high temperature corrosion in the cylindrical casing is prevented, further, dry distillation gas is effectively utilized, also, clogging by the dry distillation gas is suppressed, and stable operation is made possible. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention manufactures activated carbon which can be used as activated carbon for adsorption and other activated carbon having a wide range of uses from organic combustibles containing carbon such as sewage sludge, livestock waste, food waste, coal, and RDF. And a method and apparatus for performing the method.
[0002]
[Prior art]
The technology for carbonizing and effectively utilizing organic waste has been increasing recently, but the effective utilization range is limited in the state of carbides, so value-added such as converting activated carbon into activated carbon with excellent adsorption performance. There are proposed techniques for improving the quality.
Conventionally, as an activated carbide production apparatus, a plurality of screw conveyors having a gas flow path secured in the axial center of the cylindrical casing, in the combustion furnace, the former stage is a drying zone, the middle stage is a carbonization zone, and the latter stage is an activation zone. Connected and arranged so as to connect the water-containing organic matter supply means to the end entrance of the screw conveyor of the preceding drying zone, the steam generated in the drying zone and the carbonized gas generated in the carbonization zone with the carbide from the carbonization zone. The screw conveyors in each zone are connected at their ends so that the carbides can be activated and activated by being brought into contact in the screw conveyor in the activation zone in the latter stage, and steam and A carbonization gas / steam outlet is provided to discharge the carbonization gas into the combustion furnace. Having a configuration that exhaust port part is provided has been proposed (e.g., see Patent Document 1).
[0003]
In addition, a carbonized pipe having a screw conveyor inside is arranged in the combustion furnace, and a carbonization furnace is configured with a drying zone at the former stage, a carbonization zone at the middle stage, and an activation zone at the latter stage, and a burner below the carbonization furnace. A raw material supply device is provided at the end inlet of the carbonized pipe, and an activated carbide discharge device is provided at the end end of the carbonized pipe. The carbonized raw material supplied from the raw material supply device is indirectly heated in the carbonized pipe. Then, drying and generation of steam in the first stage, carbonization and generation of carbonized gas in the middle stage, and activation and activation by steam and carbonized gas in the subsequent stage, become activated carbide, and are discharged from the carbonized pipe by the activated carbide discharge device. A pyrolysis gas extraction pipe is connected immediately above the carbonized pipe, and the extraction pipe is connected to the washing scrubber.The outlet of the washing scrubber is connected to a burner or a scrubber. Is connected in the vicinity, heavy metal production apparatus of the active carbides as carbonization gas separated and removed is burned in the burner has been proposed (e.g., see Patent Document 2).
[0004]
In addition, a plurality of screw conveyors provided with a dry distillation gas combustion nozzle in an outer jacket penetrating the heating furnace in the horizontal direction are installed vertically, a heating burner for heating the screw conveyor is installed, and the raw material supplied to the upper screw conveyor is provided. A steam or water spray nozzle that cools the furnace and lowers the furnace temperature in a carbonization furnace that has a structure in which pyrolysis is performed under a low oxygen atmosphere to remove carbide from the lower screw conveyor while conveying A multi-stage screw conveyor type carbonization device is known, which is provided above a screw conveyor or in the middle and both of the screw conveyors (for example, see Patent Document 3).
[0005]
[Patent Document 1]
Japanese Patent No. 3055686 (1st page, 2nd page, FIG. 1)
[Patent Document 2]
JP 2001-322809 A (Page 2, Page 3, FIG. 1)
[Patent Document 3]
JP-A-2001-172639 (page 2, FIG. 1)
[0006]
[Problems to be solved by the invention]
As described above, various types of activated carbide manufacturing apparatuses have been conventionally proposed, but in order to meet the demands of the market, it is possible to manufacture products with higher performance and stable quality, and at high temperatures. It is necessary to provide an activated carbide production apparatus that can handle the above.
[0007]
In a conventional activated carbon production apparatus or activated carbon furnace, the cylindrical casing locally becomes high in temperature due to the radiant heat generated by burning the burner and the carbonization gas, and the cylindrical casing may be corroded at a high temperature. Therefore, as a measure against high-temperature corrosion, a method of providing a separate hot-air generator outside the carbonization furnace system may be adopted. At that time, it is necessary to guide the carbonized gas generated from the treated material to the hot air generating furnace, but even if the carbonized gas guide tube is heated or kept warm, it is blocked by tar char etc. in the carbonized gas and stable operation is performed. Cause trouble.
In addition, when the flow of hot air is not controlled in the high temperature part of the carbonization furnace, the temperature distribution becomes uneven in the upper part and lower part in the carbonization furnace. Due to this influence, the temperature distribution of the cylindrical casing is different between the upper and lower portions of the cylindrical casing, and the thermal expansion of the cylindrical casing also becomes uneven, that is, the thermal expansion of the lower portion of the cylindrical casing is larger than that of the upper portion of the cylindrical casing. In some cases, deformation may occur, which may adversely affect the cylindrical casing.
[0008]
Further, a gap is formed between the screw and the cylindrical casing due to the structure of the device and due to a difference in thermal expansion, and the gap is expanded in a portion where the processed material passes, so that scaling is likely to occur and remain. Therefore, the processed material is insulated by the scaling, and the heating due to the direct contact between the processed material and the cylindrical casing is hindered, thereby lowering the heat transfer efficiency and adversely affecting the stability of the product quality.
In the activated carbonization furnace, heat transfer to the processing object is mainly performed at a contact surface with the cylindrical casing. However, the processed material transported by the screw or the paddle can contact the cylindrical casing only up to the angle of repose of the transport, so that only a part of the heat transfer area of the cylindrical casing can be used.
[0009]
The present invention has been made in view of the above-mentioned points, and an object of the present invention is to manufacture an activated carbide capable of improving the quality of an activated carbide, which is a product, and responding to a high temperature of an apparatus. It is to provide a method and an apparatus.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the method for producing an activated carbide of the present invention is characterized in that a screw conveyor containing screws so that a gas flow path is formed in an axially central portion in a cylindrical casing is passed through a furnace body. So that the drying process is performed at the front, the carbonization process is performed at the middle, and the activation process is performed at the rear.The organic combustibles are supplied to the front screw conveyor while being shielded from the outside air, and the flue gas The organic combustibles are indirectly heat-treated through the front cylindrical casing to dry and generate steam, and then the dried organic matter is subjected to indirect heat treatment with the combustion exhaust gas in the middle cylindrical casing for dry distillation. Carbonization and the generation of dry distillation gas (reducing gas or pyrolysis gas), and furthermore, the carbide from the carbonization process is indirectly heated by combustion exhaust gas in the rear cylindrical casing. A method for producing an activated carbide, which is activated and activated by contacting and reacting with steam generated in a drying step and a dry distillation gas generated in a carbonization step, wherein a treated material is processed from a part where an activation step of a rear screw conveyor is performed. The cylindrical casing at the downstream part of the flow is covered with a refractory material, and a carbonized gas exhaust port is provided at the coated refractory material portion, the area around the exhaust port is divided by a shielding wall, and the carbonized gas is burned to generate hot air. The heat source is used as a heat source to prevent high-temperature corrosion of the cylindrical casing (see FIGS. 1 and 2).
[0011]
In addition, the method for producing activated carbide of the present invention, a plurality of screw conveyors containing screws so as to form a gas flow path in the axial center in the cylindrical casing, arranged by penetrating the furnace body, The drying process in the first stage, the carbonization process in the middle stage, and the activation process in the second stage are performed.The organic combustibles are supplied to the screw conveyor of the previous stage while being shut off from the outside air, and the combustion exhaust gas passes through the cylindrical casing of the previous stage. The organic combustibles are dried by indirect heat treatment to generate water vapor, and then the dried organic substances are indirectly heat treated with combustion exhaust gas in a middle-stage cylindrical casing to carbonize and carbonize and generate carbonized gas. Further, the carbide from the carbonization step is indirectly heat-treated with the combustion exhaust gas in the subsequent cylindrical casing, and the steam generated in the drying step and the carbonization step A method for producing an activated carbide that is activated and activated by contacting and reacting with a generated carbonization gas, wherein a cylindrical casing at a downstream portion of a processed material flow at a portion where an activation process of a subsequent screw conveyor is performed is coated with a refractory material. Then, a carbonized gas exhaust port is provided in the coated refractory material portion, the area around the exhaust port is divided by a shielding wall, and the carbonized gas is burned to generate hot air to serve as a heating source to prevent high-temperature corrosion of the cylindrical casing. (See FIGS. 7 and 8).
[0012]
In these methods, it is preferable to automatically or manually adjust the gap between the inner wall of the cylindrical casing and the screw (see FIGS. 5 and 6). In this case, for example, it is preferable to decenter the screw shaft with respect to the cylindrical casing (see FIGS. 3 and 4).
In some of these methods, the screw may be rotated forward and backward repeatedly to stir the contents of the screw conveyor at the same time as stirring.
[0013]
The activated carbide manufacturing apparatus of the present invention is configured such that a screw conveyor accommodating a screw such that a gas flow path is formed in a central portion in an axial direction in a cylindrical casing is passed through a furnace body, a front portion is a drying zone, and a middle portion. The carbonization zone, the rear is provided so as to be an activation zone, a raw material input port for charging organic combustibles at the end inlet of the screw conveyor of the front drying zone, the rear of the screw conveyor of the activation zone is provided. A product outlet is provided at the end outlet, and the steam generated in the drying zone and the dry distillation gas generated in the carbonization zone are brought into contact with the carbide from the carbonization zone in the screw conveyor of the rear activation zone to activate and activate the carbide. A device for producing activated carbide, which is capable of covering a cylindrical casing in a downstream portion of a processing material flow from a rear activation zone with a refractory material, A dry gas exhaust port is provided in the coated refractory material and the cylindrical casing, and the area around the exhaust port is divided by a shielding wall to form a hot air generating section, and a burner is connected to the hot air generating section (FIG. 1). (See FIG. 2).
[0014]
Further, the activated carbide manufacturing apparatus of the present invention is characterized in that a plurality of screw conveyors accommodating screws are passed through a furnace body so that a gas flow path is formed in a central portion in an axial direction in a cylindrical casing, and a former stage is dried. Zone, the middle stage is connected to the carbonization zone, the latter stage is connected and arranged so as to be the activation zone, and a raw material inlet for introducing organic combustibles is provided at the end entrance of the screw conveyor of the former drying zone, and the latter stage is provided. A product outlet is provided at the end exit of the screw conveyor in the activation zone, and the steam generated in the drying zone and the dry distillation gas generated in the carbonization zone are brought into contact with the carbide from the carbonization zone in the screw conveyor of the subsequent activation zone to form the carbide. In order to be able to activate and activate, the screw conveyor of each zone is an activated carbide production device whose ends are connected to each other, The cylindrical casing in the downstream portion of the processing flow in the activation zone of the screw conveyor of the step is coated with a refractory material, and the coated refractory material and the cylindrical casing are provided with a carbonization gas exhaust port, and the area around the exhaust port is divided by a shielding wall. And a burner is connected to the hot air generating section (see FIGS. 7 and 8).
[0015]
In the above device, it is preferable that the screw conveyor is alternately staggered by the vertical rectifying wall so that the gas flow meanders (see FIGS. 1 and 2).
In addition, the screw conveyor of the subsequent activation zone is alternately separated in a zigzag manner by vertical rectifying walls, and a reversing partition wall is provided between the hot air generating section and the uppermost rectifying wall of the flow of the processed material, so that the gas flow is reduced. Is preferably meandering (see FIGS. 7 and 8).
[0016]
In these devices, it is preferable to provide a mechanism for automatically or manually adjusting the gap between the inner wall of the cylindrical casing and the screw (see FIGS. 5 and 6).
Further, in this device, it is preferable that the screw shaft is eccentrically attached to the cylindrical casing (see FIGS. 3 and 4).
Furthermore, it is preferable that a scraping / stirring plate is provided on the periphery of the screw (see FIGS. 3 and 4).
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to the following embodiments, and can be implemented with appropriate modifications. FIG. 1 is an explanatory vertical sectional view showing a schematic configuration of an apparatus for producing an activated carbide according to a first embodiment of the present invention, FIG. 2 is an explanatory sectional view (AA sectional view), and FIG. Is a vertical cross-sectional explanatory view of the screw conveyor, and FIG. 4 is a horizontal cross-sectional explanatory view of the same.
[0018]
This embodiment shows a case where a single screw conveyor is installed. Reference numeral 10 denotes a screw conveyor disposed in the furnace body 12, and both end portions of the screw conveyor 10 protrude from the furnace body 12. The screw conveyor 10 accommodates a screw, for example, a ribbon screw 18 so that a gas flow path 16 is formed at a central portion in the axial direction within a cylindrical casing (retort) 14. Instead of the ribbon screw 18, a structure or a paddle in which a hole for gas flow is provided in a normal screw may be used. Reference numeral 20 denotes a fixing member for attaching the ribbon screw 18 to the screw shaft (main shaft) 22; 24, a scraping / stirring plate provided on the ribbon screw 18; 26, a cleaning tool such as a rod-shaped body or a ring; 28, a chimney; Is a raw material input port, and 32 is a product discharge port.
[0019]
The screw conveyor 10 has a drying zone 34 at the front, a carbonization zone (carbonized carbonization zone) 36 at the center, and an activation zone 38 at the rear in the furnace body 12 near the raw material inlet 30, and the steam and carbonization generated in the drying zone 34. The carbonized gas generated in the zone 36 is brought into contact with the carbide from the carbonization zone in the activation zone 38 at the rear to activate and activate the carbide.
[0020]
The cylindrical casing 14 in the furnace body 12 downstream of the activation zone 38 in the flow direction of the treated material is coated with a refractory material, and the coated refractory material 40 and the cylindrical casing are provided with a concentric carbonization gas exhaust port 42. Further, the periphery of the exhaust port 42 is divided by a shielding wall 44 to form a hot air generating section (hot air generating chamber) 46, and a burner 48 is connected to the hot air generating section 46. In the present embodiment, the purpose is only to supply heat from the activation zone, and therefore, it is configured so that the temperature can be adjusted by operating the burner.
[0021]
The screw conveyor 10 is partitioned by a plurality of vertical rectifying walls 50 such that the flow of the high-temperature combustion gas flowing out of the hot-air generating section 46 is meandering as indicated by a broken-line arrow. In this case, the shielding wall 44 of the hot air generating unit and the rectifying wall 50 at the outlet of the hot air generating unit may be formed of the same member as shown in FIG.
[0022]
Further, a mechanism for automatically or manually adjusting (adjusting or aligning) the gap between the inner wall of the cylindrical casing 14 and the peripheral edge of the screw 18 is provided. As shown in FIGS. 3 and 4, the screw shaft 22 is mounted eccentrically with respect to the center axis of the cylindrical casing 14.
[0023]
One example of the screw automatic adjustment mechanism is shown in FIGS. Before the operation of the activated carbide manufacturing apparatus, the lifting device 52 and the traversing device 54 are operated to adjust the gap between the peripheral portion of the screw and the cylindrical casing 14 to a minimum. At this time, the lifting amount and the traversing amount are measured in advance at the transport position of the processed material by the screw (because it advances while being scraped up, so it is located on the rotation direction side from immediately below), and the lifting / lowering / traversing adjustment amount ratio is measured. Is determined.
During operation, the electric power or current of the screw conveyor driving motor M1 is measured, and the elevation device 52 and the traversing device 54 are feedback-controlled within a range that does not increase to the measured value at the time of contact with the cylindrical casing. M2 is a motor for a lifting device, M3 is a motor for a traversing device, 56 is a bearing, 58 is a slide cover, and 60 is a slide cover holder.
[0024]
In addition, the forward rotation and the reverse rotation of the screw shaft (main shaft) 22 are repeated, for example, the forward rotation is performed a plurality of times, and then the reverse rotation is performed a plurality of times less than the forward rotation. In some cases, the agitation is performed at the same time as the transfer of the processed material).
In the case of an apparatus having a single-stage screw conveyor in the present embodiment, it is preferable to change the interval or inclination of the screw or paddle in the drying zone, the carbonization zone, and the activation zone.
[0025]
FIG. 7 is an elevational sectional view showing a schematic configuration of an activated carbide manufacturing apparatus according to a second embodiment of the present invention, and FIG. 8 is an explanatory sectional view (a sectional view taken along line CC) of the same. The present embodiment shows a case where three stages of screw conveyors are installed. Reference numerals 10a, 10b, and 10c denote screw conveyors arranged in three stages in the furnace body 12, and both end portions of the screw conveyor protrude from the furnace body 12. These screw conveyors 10a, 10b, and 10c house screws, for example, a ribbon screw 18, so that a gas flow path 16 is formed in the central portion in the axial direction within the cylindrical casings 14a, 14b, and 14c. Instead of the ribbon screw 18, a structure or a paddle in which a hole for gas flow is provided in a normal screw may be used. 28 is a chimney, 30 is a raw material input port, and 32 is a product discharge port.
[0026]
The three-stage screw conveyor includes a drying zone 62 in the first stage (upper stage), a carbonization zone (dry distillation carbonization zone) 64 in the middle stage, and an activation zone 66 in the second stage, and steam generated in the drying zone 62 and dry distillation gas generated in the carbonization zone 64. Is brought into contact with the carbide from the carbonization zone in the activation zone 66 in the subsequent stage, so that the carbide can be activated and activated.
[0027]
In the activation zone 66 of the subsequent screw conveyor, the cylindrical casing in the furnace body 12 at the downstream portion of the processing material flow is coated with a refractory material, and the coated refractory material 40 and the cylindrical casing are provided with a concentric carbonized gas exhaust port 42. I have. Further, the periphery of the exhaust port 42 is divided by a shielding wall 44 to form a hot air generating section (hot air generating chamber) 46, and a burner 48 is connected to the hot air generating section 46. Reference numerals 68 and 70 denote vertical passages of the processed material.
[0028]
The screw conveyor 10c in the activation zone 66 is divided by a plurality of flow straightening walls 50 in a vertical direction so that the flow of the high-temperature combustion gas flowing out of the hot-air generating section 46 is meandered as shown by a broken-line arrow. I have. In this case, the shielding wall 44 of the hot air generating unit and the rectifying wall 50 at the outlet of the hot air generating unit may be formed of the same member as shown in FIG. In addition, the shielding wall 44 of the hot air generating unit 46 and the upper end of the rectifying wall 50 at the uppermost stream (right side in FIG. 7) of the flow of the processing object are connected via a reversing partition wall 72. As described above, the high temperature part in the furnace is partitioned by the rectifying wall 50 in the vertical direction. The middle and low temperature sections are partitioned by a horizontal partition wall 74.
[0029]
In the conventional activated carbide manufacturing apparatus, although the air is exhausted from the upper part of the screw in the activation zone, the burner is located below the lower stage and is used for supplying heat to the drying zone and the carbonization zone. Therefore, it does not contribute to the heat supply of the activation zone, and it is difficult to adjust the temperature of the drying zone / carbonization zone. In the present embodiment, the purpose is only to supply heat from the activation zone, and therefore, it is configured so that the temperature can be adjusted by operating the burner.
In the present embodiment, as an example, a case in which a three-stage screw conveyor is provided has been described. However, two or four or more stages may be provided. Other configurations and operations are the same as those of the first embodiment.
[0030]
【The invention's effect】
The present invention is configured as described above, and has the following effects.
(1) By covering the cylindrical casing downstream of the activation zone with a refractory material to protect it, providing an exhaust port for the carbonization gas at the site, and dividing the site by a shielding wall to form a hot air generating section. In addition, since high-temperature corrosion of the cylindrical casing is prevented, and a guide pipe for the carbonization gas as in the related art is not required, the carbonization gas can be more effectively and effectively used, and the blockage due to the carbonization gas is suppressed. Therefore, stable operation becomes possible.
(2) The inside of the furnace in the high-temperature section, that is, the activation zone, is divided alternately in a staggered manner by the rectifying walls so that the hot air flows to the chimney side while being rectified up and down, so that the high and low temperature distribution can be reduced. By reducing the temperature unevenness in the vertical direction in the circumferential direction of the cylindrical casing in the longitudinal direction, the deformation of the cylindrical casing is equalized. That is, deformation that adversely affects the cylindrical casing does not occur.
(3) By providing a structure that can automatically or manually adjust the gap between the inner wall of the cylindrical casing and the peripheral edge of the screw, or by further eccentricizing the screw with respect to the cylindrical casing, the gap at the processed object passage portion is reduced. As a result, the scaling is naturally eliminated and the deterioration of the heat transfer efficiency can be prevented, so that the product quality is stabilized.
(4) When a structure is used in which a scraping / stirring plate is provided between the blades of the screw at an angle with a high scraping effect of the processed material, the circumference of the screw or paddle is optimized so as to optimize the effect. By paying attention to the installation number in the direction and the longitudinal direction as necessary, the treated object can contact the heat transfer part of the cylindrical casing higher than the angle of repose, and the heat transfer area is greatly improved. Can be. In addition, since the processed material is stirred up and stirred, an agitation effect not generated by transport alone is exhibited, and the processed material is uniformly heated, which is also effective for quality improvement. Furthermore, by appropriately using the scraping / stirring plate parallel to the main shaft, inclined in the feed direction, and inclined in the return direction, it is possible to secure an optimum residence time in each heating step.
[Brief description of the drawings]
FIG. 1 is a schematic vertical cross-sectional configuration explanatory view showing an apparatus for producing activated carbide according to a first embodiment of the present invention.
FIG. 2 is an explanatory cross-sectional view taken along line AA in FIG.
FIG. 3 is an explanatory longitudinal sectional view of the screw conveyor in FIGS. 1 and 2;
FIG. 4 is an explanatory cross-sectional view of the same.
FIG. 5 is an explanatory front view showing an example of an automatic screw adjustment mechanism.
FIG. 6 is a sectional view taken along the line BB in FIG. 5;
FIG. 7 is a schematic vertical sectional view illustrating an apparatus for producing activated carbide according to a second embodiment of the present invention.
FIG. 8 is a sectional view taken along line CC in FIG. 7;
[Explanation of symbols]
10, 10a, 10b, 10c Screw conveyor 12 Furnace body 14, 14a, 14b, 14c Cylindrical casing 16 Flow path 18 Ribbon screw 20 Fixing member 22 Screw shaft (main shaft)
24 Raising / stirring plate 26 Cleaning tool 28 Chimney 30 Raw material inlet 32 Product outlet 34, 62 Drying zone 36, 64 Carbonization zone 38, 66 Activation zone 40 Coated refractory material 42 Carbonized gas exhaust port 44 Shield wall 46 Hot air generator 48 Burner 50 Straightening wall 52 Lifting device 54 Traversing device 56 Bearing 58 Slide cover 60 Slide cover retainer 68, 70 Vertical passage 72 Reversing partition 74 Horizontal partition

Claims (11)

A screw conveyor housing the screws so that a gas flow path is formed in the central part in the axial direction in the cylindrical casing is disposed so as to penetrate the furnace body, and the drying step is performed in the front part, the carbonization step is performed in the middle part, and the rear part is performed. So that the activation process is performed in
The organic combustibles are supplied into the front screw conveyor while being shielded from the outside air, and the combustion combustibles are dried by indirect heating treatment of the organic combustibles through the front cylindrical casing through the front cylindrical casing, and steam is generated.
Then, the dried organic matter is subjected to indirect heating treatment with combustion exhaust gas in the middle cylindrical casing to dry-distill and carbonize, and generate a dry-distilled gas.
In addition, the carbide from the carbonization process is indirectly heat-treated with the combustion exhaust gas in the rear cylindrical casing, and the activated carbon is activated and activated by contacting and reacting with the steam generated in the drying process and the dry distillation gas generated in the carbonization process. A manufacturing method,
From the part where the activation process of the rear screw conveyor is performed, the cylindrical casing in the downstream part of the processing material flow is coated with a refractory material, a carbonization gas exhaust port is provided in this coated refractory material part, and the surroundings of this exhaust port with a shielding wall. A method for producing an activated carbide, comprising dividing and heating a dry distillation gas to generate hot air to serve as a heating source to prevent high-temperature corrosion of a cylindrical casing. A plurality of screw conveyors accommodating screws so that a gas flow path is formed in the central portion in the axial direction in the cylindrical casing, the furnace body is penetrated and arranged, a drying step in the former stage, a carbonizing step in the middle stage, So that the activation process is performed at a later stage,
Organic combustibles are supplied to the screw conveyor of the preceding stage while being shut off from the outside air, and the organic combustibles are indirectly heated and dried by the combustion exhaust gas through the cylindrical casing of the preceding stage, and steam is generated.
Then, the dried organic matter is subjected to indirect heating treatment by combustion exhaust gas in a middle cylindrical casing to dry-distill and carbonize, and generate a dry-distilled gas.
Furthermore, the carbide from the carbonization step is indirectly heated with combustion exhaust gas in the cylindrical casing at the subsequent stage, and activated and activated by contacting and reacting with the steam generated in the drying step and the dry distillation gas generated in the carbonization step. A manufacturing method,
The cylindrical casing in the downstream part of the flow of the processed material in the part where the activation process of the subsequent screw conveyor is performed is coated with a refractory material, a carbonization gas exhaust port is provided in the coated refractory material portion, and the surroundings of the exhaust port with a shielding wall. A method for producing an activated carbide, wherein the activated carbon is divided, and the carbonized gas is burned to generate hot air to be used as a heating source to prevent high-temperature corrosion of the cylindrical casing. The method according to claim 1 or 2, wherein the gap between the inner wall of the cylindrical casing and the screw is adjusted automatically or manually. 4. The method for producing activated carbide according to claim 1, wherein the screw is rotated forward and backward repeatedly to stir the contents of the screw conveyor while stirring. A screw conveyor containing screws so that a gas flow path is formed in the central part in the axial direction in the cylindrical casing is passed through the furnace body, the front part becomes a drying zone, the middle part becomes a carbonization zone, and the rear part becomes an activation zone. So that
A raw material inlet for charging organic combustibles is provided at an end entrance of the screw conveyor in the front drying zone,
A product outlet is provided at the end exit of the screw conveyor in the rear activation zone,
Manufacture of activated carbide in which the steam generated in the drying zone and the dry distillation gas generated in the carbonization zone are brought into contact with the carbide from the carbonization zone in the screw conveyor of the rear activation zone to activate and activate the carbide. A device,
The cylindrical casing in the downstream part of the processing material flow from the rear activation zone is coated with a refractory material, and the coated refractory material and the cylindrical casing are provided with a carbonized gas exhaust port, and the area around the exhaust port is divided by a shielding wall to generate hot air. And a burner connected to the hot air generating section. A plurality of screw conveyors containing screws so that a gas flow path is formed in the central portion in the axial direction in the cylindrical casing, the furnace body is penetrated, the former stage is a drying zone, the middle stage is a carbonization zone, and the latter stage is an activation zone. Connect and arrange so that
A raw material input port for charging organic combustibles is provided at the end entrance of the screw conveyor in the preceding drying zone,
A product outlet is provided at the end exit of the screw conveyor in the subsequent activation zone,
The screw of each zone is activated so that the steam generated in the drying zone and the dry distillation gas generated in the carbonization zone are brought into contact with the carbide from the carbonization zone in the screw conveyor of the subsequent activation zone to activate and activate the carbide. The conveyor is an activated carbide manufacturing device whose ends are connected to each other,
The cylindrical casing at the downstream portion of the flow of the processed material in the activation zone of the subsequent screw conveyor is coated with a refractory material, and the coated refractory material and the cylindrical casing are provided with a carbonization gas exhaust port, and the area around the exhaust port is divided by a shielding wall. A hot air generating section, and a burner connected to the hot air generating section. 6. The activated carbide manufacturing apparatus according to claim 5, wherein the screw conveyor is divided in a zigzag manner by vertical straightening walls so that the gas flow meanders. The screw conveyor of the subsequent activation zone is alternately separated in a staggered manner by vertical rectifying walls, and a reversing partition wall is provided between the hot air generating section and the uppermost rectifying wall of the uppermost stream of the processing object flow, so that the gas flow is reduced. 7. The apparatus for producing activated carbide according to claim 6, wherein the apparatus is arranged to meander. 9. The activated carbide producing apparatus according to claim 5, further comprising a mechanism for automatically or manually adjusting a gap between the inner wall of the cylindrical casing and the screw. The activated carbide manufacturing apparatus according to claim 9, wherein the screw shaft is eccentric with respect to the cylindrical casing. The activated carbide producing apparatus according to any one of claims 5 to 10, wherein a scraping / stirring plate is provided at a peripheral portion of the screw.

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