JPH0789707A - Continuous production of activated carbon or carbon ceramic - Google Patents

Abstract

PURPOSE:To continuously mass-produce activated carbon or carbon ceramic at a low cost by introducing a specified raw material into a hopper through a quantitative feed line, then transferring the material downward through a cylinder to heat the material, discharging the material and post-treating the material. CONSTITUTION:A paper-making sludge pretreated by a filter press, etc., or an org. material as a carbon source is formed into a shape suitable for firing to obtain a raw material 1, the material 1 is transferred by a conveyor 3 through a quantitative feeder 2, passed through a screen feeder 16, a drying furnace 17 and a roll crusher 8 and charged into a multiple hopper 4, and the fine-grain material is obtained. The fine-grain material is introduced into a vertical cylinder 5 in a lower special rotary kiln 6, externally heated to about 900 deg.C by an outer flame and transferred downward. The material is cooled by a radiator 18, etc., and the obtained carbonized material 7 is crushed by a crusher 8 to produce activated carbon. Meanwhile, the material 7, a ceramic material 9 and water 22 are kneaded, the kneaded material is formed by a machine 10, dried and fired in the vertical cylinder 6 in an unmelted state to produce a granular carbon ceramic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously and automatically mass-producing activated carbon or carbon ceramic (adsorbent) by utilizing sludge and other waste materials.

[0002]

2. Description of the Related Art In the conventional firing process in the production of activated carbons, a method has been adopted in which raw materials are mainly stored in a closed container made of stainless steel and the raw material is fired in a tunnel kiln.

Alternatively, recently, the present inventors have attempted to carry out reduction (non-oxidation) firing in an external flame type muffle kiln or rotary kiln.

[0004]

During the firing process of activated carbons, it is necessary to prevent the inflow of oxygen in order to prevent the combustion of the activated carbons. On the other hand, the combustible dry distillate produced by the heating of the organic raw material is required. (Combustible gas) must be removed and burned, and the volume of the organic raw material is greatly reduced by that amount, and a gap is formed above, and oxygen flows into the gap to burn the activated carbon partially. Tended to.

Therefore, this not only leads to a decrease in yield and quality, but it also makes it extremely difficult to form a low-cost, labor-saving continuous automatic production line, since the auxiliary equipment such as the closed container and the soot processing device and the labor are complicated. There was a problem. An object of the present invention is to solve such a problem.

[0006]

[Means for Solving the Problems] Paper sludge, coconut shell,
Pretreatment of balm oil cake, beer and other sake lees, peels of mandarin oranges, and various organic raw materials (1) that serve as carbon sources into a form suitable for baking such as appropriate dehydration, compression solidification, sizing, and drying. At the same time (before and after that), it is put on the fixed amount supply line by the constant amount supply device (2), the conveyor (3), etc., and this is put into the hopper (4), and the cylindrical body (5) that extends in the vertical direction thereunder is placed. And the organic raw material (1) is introduced therein and gradually transferred downward (by screw rotation or a rotary kiln (6) system) and a temperature sufficient for carbonization is given from the outside thereof to form the tubular body. The carbide (7) discharged from the lower end of the product is appropriately post-treated into a form suitable for the purpose of use and commercialized.

As the "post-treatment", for example, the discharged carbide (7) is pulverized by a roll crusher (8), the ceramic raw material (9) such as clay is blended, and the clay extruder (10) or The activated carbon in the form of a ceramic is obtained by putting the granular material (using a granulator (11) or the like) into a vertical cylindrical body (5) again and moving it downward while heating it from the outside and firing it in a non-melting state. That is, the carbon ceramic (12) is used.

Further, in the above-mentioned "post-treatment", granulation is not carried out and a large-sized molded product (plate shape, U groove shape, pipe shape, lump shape, etc.)
When set to, it will be a relatively high value-added product,
It may be fired in a non-molten state in another reduction or non-oxidation firing line.

When the organic raw material (1) is placed in the vertical cylindrical body (5) and heated from outside to carbonization, a large amount of soot (13) is generated from above the hopper (4). It is advisable to provide a soot collecting duct (14) there and incinerate this together with soot generated from the heating fuel in the soot treating secondary combustion furnace (15).

[0010]

According to the present invention, a relatively bulky raw material containing air is transferred while being compressed as the raw material falls from above in a vertical cylindrical body, and is carbonized by receiving heat from the outside in the anoxic state without forming a gap above. To do. At that time, even if a large amount of volatile substances scatter and the volume decreases, there is no room to create a gap again because the raw material is always introduced and dropped from above, and at least the high heat part of the raw material is always dense and acid. It will be automatically kept in a missing state.

Therefore, it has become much easier to incorporate it into an automation line that does not require a closed container using a constant quantity feeder and a conveyor, and it has become possible to provide a fully continuous automatic production system including carbon ceramics.

[0012]

[Example 1] Papermaking sludge or the above-mentioned organic raw material (1) which has been appropriately pretreated by a filter press, a rotary dewatering device, a compression solidification device or the like is transferred by a conveyor (3) via a constant quantity feeder (2). , Screen feeder (1
6) and drying oven (17) and roll crusher (8)
Then, it is made into fine granules, charged into a multi-type hopper (4), introduced into the vertical cylindrical body (5) in the special rotary kiln (6) below, and heated to about 900 ° C from the outside by the external flame method. While gradually moving downward. In addition, a radiator (18) and a water pump (19) are installed in the lower part for cooling, and the carbide (7) discharged from the lower end is transferred to a roll crusher (8) by a conveyor (3) to be powdered to obtain activated carbon. To get

[0013]

[Example 2] The powdered carbide (7) obtained in the above "Example 1" was introduced into the carbon hopper (20), and the ceramic raw material (9) from another line was introduced into the ceramic raw material hopper (21). Then, these are kneaded with the water from the water tank (22) in the kneading machine (23), shaped into a sommen shape by the earth kneading extrusion molding machine (10), and crushed through the drying furnace (17) to produce a broken product. The granulator (24) and the vibration shaker (25) are put into the hopper (4), and again introduced into the vertical cylindrical body (5) in the external flame type special rotary kiln (6) and gradually moved downward. While heating from the outside, a granular carbon ceramic (12) fired in a non-molten state is obtained. This is transferred to the finished product stock hopper (26) and the quantitative measurement feeder (2
The product (28) is packaged through 7).

[0014]

[Embodiment 3] The material is molded into a plate-like, tubular, or other suitable shape in the clay kneading extruder (10) in the above-mentioned "Example 2", and this is fired in an ordinary reducing or non-oxidizing firing furnace. In this case, it is possible to use a horizontal kiln because it is possible to take into consideration the generation of gaps due to firing and the inflow of oxygen in a large ceramic molded product.

Needless to say, the present invention is not limited to the above embodiments.

[0016]

As described above, according to the present invention, the conventional closed container made of stainless steel and its filling work are not required,
Since even a bulk organic material containing air can be continuously reduced and fired without causing gaps or oxygen inflow, mass production at low cost becomes possible, and simultaneous treatment of soot is facilitated, which is a great effect.

[Brief description of drawings]

FIG. 1 is a process chart showing an embodiment of the present invention.

[Explanation of symbols]

1 ………… Organic raw material 2 ………… Quantitative feeder 3…
…… Conveyor 4 ………… Hopper 5 ………… (Vertical) tubular body 6 ………… Rotary kiln 7 ………… Carbide 8 ………… Roll crusher 9 ………… Indentation material 10 ………… Mixing extruder 11 ………… Granulator 12 ………… Carbon ceramic 13 ………… Smoke 14 ……
Soot collecting duct 15 Soot treatment secondary combustion furnace 16 Screen feeder 17 Drying furnace 18 Radiator 19
……… Water pump 20 ……… Carbon hopper 21 ……… Ceramic raw material hopper 22 ……… Water tank 23 ……… Kneader 24
………… Granulator 25 ………… Vibration shake 26 ………… Completed product stock hopper 27 ………… Quantitative measurement feeder 28 ………… Bagged product

Claims (3)

[Claims] 1. Paper-making sludge and other organic raw material serving as a carbon source are pre-treated into a form suitable for firing, put on a fixed amount supply line and charged into a hopper, and a cylindrical body extending vertically is connected below the hopper. Then, the organic raw material is introduced therein and gradually transferred downward, and a temperature sufficient for carbonization is given from the outside thereof, and the carbide discharged from the lower end of the tubular body is appropriately post-treated. Continuous production method of activated carbon or carbon ceramics. 2. In the "post-treatment", a powdered discharged carbide is blended with a ceramic raw material such as clay and molded into a granular form, which is again stored in a vertical cylindrical body and heated downward from the outside while being transferred. The method for continuously producing activated carbon or carbon ceramics according to claim 1, wherein firing is performed in a non-molten state. 3. In the "post-treatment", a powdered discharged carbide is blended with a ceramic raw material such as clay to form or form a large solid, which is then fired in a non-melting state in a reducing or non-oxidizing firing line. The method for continuously producing activated carbon or carbon ceramic according to claim 1, wherein