JPH0825733B2 - Activated carbon manufacturing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is directed to producing activated carbon by activating it in a firing activation furnace using wood, coconut shells, etc. as a raw material, and regenerating activated carbon having adsorbed pollutants, pigments, odor components and the like. The present invention relates to an apparatus for producing activated carbon.

[0002]

2. Description of the Related Art Conventionally, as a means for producing activated carbon from paper sludge, wood chips, coconut shells, etc., when the firing furnace is in an oxidizing atmosphere, carbon, which is the main component of activated carbon, burns and disappears. Vacuum furnaces that shut off air, sealed furnaces, batch furnaces, etc. are used, but these vacuum furnaces are very expensive devices due to their structure, and the loading of organic substances and activated carbon for batch type, At the time of taking out, the hermetically sealed state is destroyed, so it is not possible to continuously produce activated carbon,
Furthermore, it had the drawback that it would be extremely difficult to automate it.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides an apparatus for producing activated carbon, which is capable of producing and regenerating activated carbon by heat-treating an organic substance in a substantially oxygen-free state and performing continuous production. It is a thing.

[0004]

DISCLOSURE OF THE INVENTION In view of the problem of difficulty in continuous production while maintaining a vacuum state based on the above-mentioned prior art, the present invention has a muffle tube vertically installed in a furnace body to be heated, By providing a raw material input hopper and a product discharge port in the pipe, the organic carbon is continuously heat-treated during the descent of the muffle pipe to manufacture and regenerate the activated carbon,
In the muffle tube, the air thermally expands to become lean and becomes heat-treated in a substantially oxygen-free state to solve the above problems.

[0005]

In the present invention, when the heat treatment is performed in the firing zone of the treatment space in the muffle tube, the air thermally expands and becomes a substantially oxygen-free state of the lean air, and the heat treatment is performed by preventing the carbon component from being burnt and disappearing. The organic substance is continuously dropped from the raw material feeding hopper to the product discharge port, and is continuously heat-treated in a substantially oxygen-free state in the firing zone.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings, in which 1 is an apparatus for producing activated carbon, which is also referred to as a firing activation furnace mainly comprising an upright muffle type rotary kiln according to the present invention, and a furnace body 2 Is composed of a cylindrical wall body 3 made of refractory material and upper and lower partition walls 4, 5, and legs 6 and 6a are fixedly provided at the lower end of the furnace body 2 to provide a discharge work space 7.

Reference numeral 8 is a vertical muffle tube for continuously heat-treating the organic substance M which is a carbon-containing material. The muffle tube 8 is erected at the center of the furnace main body 2 to form an indirect heating system.
Together with, the upper part of the muffle tube 8 is installed a raw material input hopper 9 at its upper end with penetrating the upper partition wall 4 of the furnace body 2, and the lower part of the muffle tube 8 through the lower partition 5 of the furnace body 2, the At the lower end, a product discharge port 10 with a tip inclined downward is installed.

Reference numerals 11, 11a ... Are gas burners provided on the wall 3 of the furnace body 2 and heating sources such as an electric heating type. When the gas burner is used, the heating sources are provided perpendicularly to the wall 3 or of the furnace body 2. An exhaust chimney 13 which is attached in an inclined shape in order to make the internal space 12 uniform and which communicates with the internal space 12 above the wall 3 of the furnace body 2.
Is provided.

Reference numeral 14 is a rotary shaft loaded in the muffle tube 8. The rotary shaft 14 is rotated by a drive motor 15 at an appropriate speed, and a stirring blade 16 for stirring or lowering the organic substance M on the rotary shaft 14 is provided. , 16a are provided to form the stirring device 17, or the muffle tube 8 is configured to be rotatable by a drive motor 18 at an appropriate speed, and similar stirring blades 19, 19a are provided on the inner surface of the muffle tube 8 to provide the stirring device. It is 20.

Reference numeral 21 denotes a cooling device attached to the lower end of the muffle tube 8, which is provided with radiator plates 22, 22a ... At the lower end of the muffle tube 8 and a water jacket 23 surrounding the radiator plates 22, 22a. The water jacket 23 is provided with a radiator 24, a water pump 25, a circulation path 26 and the like.

The muffle tube 8 located in the discharge work space 7 may be extended at its lower end to provide natural cooling.

Further, in order to replenish the muffle tube 8 with air required for smoking the organic substance M and to set various atmospheres such as an alkali atmosphere, a nitrogen atmosphere, a hydrogen atmosphere, etc., the rotary shaft 14 In place of the hollow pipe 27, or the rotary shaft 14 is formed as a hollow pipe 27, and the hollow pipe 27 is provided with jet ports 28, 28a ...
Further, a supply pipe 29 for supplying air or the like to the hollow pipe 27 is provided, or the lower portion of the muffle pipe 8 is provided with a gas jacket 30.
The gas jacket 30 is connected to a supply pipe 31 for supplying air or the like, and the muffle pipe 8 is further provided with communication holes 32, 32a.
Perforate ...

[0013] Next, to explain the action of the activated carbon manufacturing apparatus according to the present invention, when the internal space 12 high temperature heating of the heating source 11, 11a ... by a furnace body 2, the processing space 33 inside the muffle tube 8 is indirectly is heated to, whereas the raw material input hopper 9 of organic substances M of pellets or the like introduced from organic substances M present in the preheating zone 34 in the processing space 33 top is gradually heated, the processing space 33 of central firing zone 35 The existing organic substance M is smoked by high temperature heating in a substantially oxygen-free state in which a trace amount of oxygen is present, and the activated carbon W existing in the cooling zone 36 below the treatment space 33 is gradually cooled, and the smoke treatment by heat treatment is completed. The activated carbon W is continuously discharged and taken out from the product discharge port 10.

As the organic substance M, a wide range of raw materials including plants can be used as carbon-containing substances such as paper sludge, wood chips, coconut shells, wood, charcoal, coconut shell charcoal and lignite. The adsorbed activated carbon is fed as an organic substance M for regeneration. In such regeneration, the activated carbon is somewhat worn away, so new carbon such as the above organic substance M is replenished, and the organic substance M fed from the raw material feeding hopper 9 is replenished. The form may contain a large amount of water, but it is preferable that the organic substance M is crushed to a size of pellets or particles and appropriately dried.

During such heat treatment, when the organic substance M is fed from the raw material feeding hopper 9, some air and moisture are mixed around the organic substance M, and the muffle tube 8
In the firing zone 35 of the treatment space 33, the organic substance M is heat-treated, and the air around the organic matter M is heated to a high temperature and greatly expands, so that the air becomes lean in the firing zone 35.
A substantially oxygen-free state in which a small amount of oxygen is present is obtained, and the carbon component of the organic substance M is not lost, and the heat treatment by smoking is performed.

As a result, at the same time as the organic substance M is introduced from the raw material introduction hopper 9, the air and moisture which try to enter are
The air expanded in the baking zone 35 of the processing space 33 and the evaporated water have a high pressure in the baking zone 35, and the air in the baking zone 35 is
Raw material charging hopper 9 or product outlet 10 with the tip open
The expanded air and the like move toward the side, and the expanded air or the like becomes a wall, and the air that passes through the preheat zone 34 from the raw material input hopper 9 and enters the firing zone 35 is reduced, and the substantially oxygen-free state as described above. Becomes

Further, the organic substance M fed from the raw material feeding hopper 9 descends by its own weight, and the organic substance M is agitated by the driving operation of the drive motors 15 and 18 to rotate the muffle tube 8 or the rotary shaft 14. The heat treatment in the muffle tube 8 is performed uniformly and quickly, and even if the organic substance M is lightweight, it can be easily lowered by stirring.

The heat-treated activated carbon W descends from the muffle tube 8 in the furnace body 2 to the cooling zone 36 of the muffle tube 8 located in the discharge work space 7 and is gradually cooled naturally.
Heat-treated activated carbon W will not be cooled enough
When discharged from 10, there is a risk of spontaneous combustion, so the cooling device 21 at the lower end of the muffle tube 8 controls the cooling rate to set the optimum cooling conditions for the room temperature stability of the activated carbon W.

Further, the jet ports 28, 28a ... Or the communication holes 32, 32
By supplying air or an inert gas to the burning zone 35 of the muffle tube 8 from a ..., it is possible to adjust the optimum amount of air for smoking, or to optimize the relationship between the organic substance M as a material and the activated carbon W as a product. Set the firing conditions.

[0020]

In summary, the present invention is an apparatus for producing activated carbon.
And then vertically muffle tube 8 into the furnace body 2 which is heated by the heating source 11, 11a ..., organic pledge in the muffle tube 8
The quality of the organic matter M
Prevents burnout and sets firing conditions in the furnace body 2.
In comparison, it can be performed only inside the muffle tube 8 of low volume,
Further , a raw material charging hopper 9 is provided in an upper opening state on the upper end of the muffle tube 8 which is projected upward from the furnace main body 2, and
The cooling zone 3 is provided at the lower end of the muffle tube 8 protruding downward from the body 2.
Since 6 and the product discharge port 10 are provided in a state where the tip end is opened, only by feeding the organic substance M from the raw material feeding hopper 9,
By heat-treating in the vertical muffle tube 8 and continuously taking out the activated carbon W from the product discharge port 10, the heat treatment of the organic substance M can be continuously and completely automated, and the muffle tube 8 is fired. In the band 35, the air expands and becomes lean, and the carbon component does not disappear, and the heat treatment can be performed in a substantially oxygen-free state.

Further , the rotary shaft 14 is vertically installed in the muffle tube 8.
And the stirring blades 16, 16a, ...
Since the organic substance M in the muffle tube 8 is freely stirrable, the organic substance M in the muffle tube 8 can be uniformly and rapidly heat-treated by stirring the organic substance M in the muffle tube 8. It is possible to control the passage speed of the organic substance M, to facilitate the fall of the organic substance M having a low specific gravity, and to rotate the stirring of the organic substance M as a rotary shaft.
14 and the stirring blades 16 and 16a constitute a stirring device 17.
By doing so, the organic substance M is stirred with a simple device.
I can do it.

[0022]

The muffle tube 8 is rotatable and the stirring blades 19, 19a are provided on the inner surface of the muffle tube 8.
Since a wide against organic substances M in a synergistic effect of the rotation of both organic substances stirring or can be done with a simple accessory which forms a rotatable muffle tube 8 of M, muffle tube 8 and the rotary shaft 14 Can be stirred.

Further, since the air supply or various atmospheres can be freely set in the muffle tube 8, it is possible to replenish the air required for smoking according to the organic substance M, or the organic substance M and the activated carbon W. It is possible to perform heat treatment in various atmospheres suitable for the type and relationship.

Further, the hollow pipe 27 is inserted into the muffle tube 8 or the rotary shaft 14 having the stirring blades 16, 16a ... Is formed as the hollow pipe 27, and the jet port 2 is provided in the hollow pipe 27.
8 and 28a are bored and a supply pipe 29 is connected to the hollow pipe 27, or the muffle tube 8 in the furnace body 2 is surrounded by a gas jacket 30 and communication holes 32, 32a are bored in the muffle tube 8. With gas jacket 30
Since the supply pipe 31 is connected to, the air replenishment in the muffle pipe 8 and various atmosphere settings can be performed by a simple device such as the hollow pipe 27 and the gas jacket 30.

In addition, although the removal rate of the activated carbon W decreases in natural cooling, since the cooling device 21 is provided at the lower end of the muffle tube 8 or the cooling zone 36, the cooling rate can be improved or controlled, and the continuous activated carbon W is continuously cooled. Can be manufactured, a cooling curve suitable for the types of the organic substance M and the activated carbon W can be obtained, and the practical effect thereof is extremely great.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an activated carbon production apparatus according to the present invention.

FIG. 2 is a schematic configuration diagram of a manufacturing apparatus in which a muffle tube is rotatable and various atmospheres can be freely set.

FIG. 3 is a schematic plan view showing the shape of a furnace body.

FIG. 4 is a schematic configuration diagram of a manufacturing apparatus in which various atmospheres can be freely set in a muffle tube.

5 is a cross-sectional view of the main parts of FIG.

[Explanation of symbols]

 2 Furnace body 8 Muffle tube 9 Raw material input hopper 10 Product discharge port 11, 11a… Heating source 14 Rotating shaft 16, 16a… Stirring blade 17 Stirring device 19, 19a… Stirring blade 20 Stirring device 21 Cooling device 27 Hollow pipe 28, 28a … Spout 29 Supply pipe 30 Gas jacket 31 Supply pipe 32, 32a… Communication hole 36 Cooling zone

Claims (6)

[Claims] 1. A muffle tube is vertically installed in a furnace body heated by a heating source to indirectly add an organic substance in the muffle tube.
In a heated activated carbon manufacturing device, project upward from the furnace body
The material input hopper is opened upward at the upper end of the muffle tube.
In addition , the cooling pipe and the product discharge port are provided at the lower end of the muffle pipe projecting downward from the furnace body with the tip open.
In addition, the rotary shaft is hung vertically in the muffle tube and
An activated carbon manufacturing apparatus characterized in that a stirring blade is provided on the outer circumference of the shaft . With wherein forming rotatable muffle tube, according to characterized in that a stirring blade to the inner surface of the muffle tube
Item 1. The apparatus for producing activated carbon according to item 1 . 3. The muffle tube is configured so that air supply or various atmospheres can be freely set.
Activated carbon manufacturing equipment. 4. A hollow pipe is inserted into the muffle pipe, or a rotary shaft having a stirring blade is formed as a hollow pipe, a jet port is bored in the hollow pipe, and a supply pipe is connected to the hollow pipe. The activated carbon manufacturing apparatus according to claim 3 . The muffle tube 5. A furnace body was surrounded by a gas jacket, characterized in that connecting the supply pipe to the gas jacket with drilling communicating holes into the muffle tube according
Item 3. The activated carbon manufacturing apparatus according to item 3 . 6. claims, characterized in that a cooling device in the lower end or the cooling zone of the muffle tube 1, 2, 3, 4 or 5
Activated carbon manufacturing equipment.